新增lib

Include/site/python3.11/greenlet/greenlet.h

+/* -*- indent-tabs-mode: nil; tab-width: 4; -*- */
+
+/* Greenlet object interface */
+
+#ifndef Py_GREENLETOBJECT_H
+#define Py_GREENLETOBJECT_H
+
+
+#include <Python.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* This is deprecated and undocumented. It does not change. */
+#define GREENLET_VERSION "1.0.0"
+
+#ifndef GREENLET_MODULE
+#define implementation_ptr_t void*
+#endif
+
+typedef struct _greenlet {
+    PyObject_HEAD
+    PyObject* weakreflist;
+    PyObject* dict;
+    implementation_ptr_t pimpl;
+} PyGreenlet;
+
+#define PyGreenlet_Check(op) (op && PyObject_TypeCheck(op, &PyGreenlet_Type))
+
+
+/* C API functions */
+
+/* Total number of symbols that are exported */
+#define PyGreenlet_API_pointers 12
+
+#define PyGreenlet_Type_NUM 0
+#define PyExc_GreenletError_NUM 1
+#define PyExc_GreenletExit_NUM 2
+
+#define PyGreenlet_New_NUM 3
+#define PyGreenlet_GetCurrent_NUM 4
+#define PyGreenlet_Throw_NUM 5
+#define PyGreenlet_Switch_NUM 6
+#define PyGreenlet_SetParent_NUM 7
+
+#define PyGreenlet_MAIN_NUM 8
+#define PyGreenlet_STARTED_NUM 9
+#define PyGreenlet_ACTIVE_NUM 10
+#define PyGreenlet_GET_PARENT_NUM 11
+
+#ifndef GREENLET_MODULE
+/* This section is used by modules that uses the greenlet C API */
+static void** _PyGreenlet_API = NULL;
+
+#    define PyGreenlet_Type \
+        (*(PyTypeObject*)_PyGreenlet_API[PyGreenlet_Type_NUM])
+
+#    define PyExc_GreenletError \
+        ((PyObject*)_PyGreenlet_API[PyExc_GreenletError_NUM])
+
+#    define PyExc_GreenletExit \
+        ((PyObject*)_PyGreenlet_API[PyExc_GreenletExit_NUM])
+
+/*
+ * PyGreenlet_New(PyObject *args)
+ *
+ * greenlet.greenlet(run, parent=None)
+ */
+#    define PyGreenlet_New                                        \
+        (*(PyGreenlet * (*)(PyObject * run, PyGreenlet * parent)) \
+             _PyGreenlet_API[PyGreenlet_New_NUM])
+
+/*
+ * PyGreenlet_GetCurrent(void)
+ *
+ * greenlet.getcurrent()
+ */
+#    define PyGreenlet_GetCurrent \
+        (*(PyGreenlet * (*)(void)) _PyGreenlet_API[PyGreenlet_GetCurrent_NUM])
+
+/*
+ * PyGreenlet_Throw(
+ *         PyGreenlet *greenlet,
+ *         PyObject *typ,
+ *         PyObject *val,
+ *         PyObject *tb)
+ *
+ * g.throw(...)
+ */
+#    define PyGreenlet_Throw                 \
+        (*(PyObject * (*)(PyGreenlet * self, \
+                          PyObject * typ,    \
+                          PyObject * val,    \
+                          PyObject * tb))    \
+             _PyGreenlet_API[PyGreenlet_Throw_NUM])
+
+/*
+ * PyGreenlet_Switch(PyGreenlet *greenlet, PyObject *args)
+ *
+ * g.switch(*args, **kwargs)
+ */
+#    define PyGreenlet_Switch                                              \
+        (*(PyObject *                                                      \
+           (*)(PyGreenlet * greenlet, PyObject * args, PyObject * kwargs)) \
+             _PyGreenlet_API[PyGreenlet_Switch_NUM])
+
+/*
+ * PyGreenlet_SetParent(PyObject *greenlet, PyObject *new_parent)
+ *
+ * g.parent = new_parent
+ */
+#    define PyGreenlet_SetParent                                 \
+        (*(int (*)(PyGreenlet * greenlet, PyGreenlet * nparent)) \
+             _PyGreenlet_API[PyGreenlet_SetParent_NUM])
+
+/*
+ * PyGreenlet_GetParent(PyObject* greenlet)
+ *
+ * return greenlet.parent;
+ *
+ * This could return NULL even if there is no exception active.
+ * If it does not return NULL, you are responsible for decrementing the
+ * reference count.
+ */
+#     define PyGreenlet_GetParent                                    \
+    (*(PyGreenlet* (*)(PyGreenlet*))                                 \
+     _PyGreenlet_API[PyGreenlet_GET_PARENT_NUM])
+
+/*
+ * deprecated, undocumented alias.
+ */
+#     define PyGreenlet_GET_PARENT PyGreenlet_GetParent
+
+#     define PyGreenlet_MAIN                                         \
+    (*(int (*)(PyGreenlet*))                                         \
+     _PyGreenlet_API[PyGreenlet_MAIN_NUM])
+
+#     define PyGreenlet_STARTED                                      \
+    (*(int (*)(PyGreenlet*))                                         \
+     _PyGreenlet_API[PyGreenlet_STARTED_NUM])
+
+#     define PyGreenlet_ACTIVE                                       \
+    (*(int (*)(PyGreenlet*))                                         \
+     _PyGreenlet_API[PyGreenlet_ACTIVE_NUM])
+
+
+
+
+/* Macro that imports greenlet and initializes C API */
+/* NOTE: This has actually moved to ``greenlet._greenlet._C_API``, but we
+   keep the older definition to be sure older code that might have a copy of
+   the header still works. */
+#    define PyGreenlet_Import()                                               \
+        {                                                                     \
+            _PyGreenlet_API = (void**)PyCapsule_Import("greenlet._C_API", 0); \
+        }
+
+#endif /* GREENLET_MODULE */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_GREENLETOBJECT_H */

Lib/site-packages/Crypto/Cipher/AES.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/AES.py : AES
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  c_size_t, c_uint8_ptr)
+
+from Crypto.Util import _cpu_features
+from Crypto.Random import get_random_bytes
+
+MODE_ECB = 1        #: Electronic Code Book (:ref:`ecb_mode`)
+MODE_CBC = 2        #: Cipher-Block Chaining (:ref:`cbc_mode`)
+MODE_CFB = 3        #: Cipher Feedback (:ref:`cfb_mode`)
+MODE_OFB = 5        #: Output Feedback (:ref:`ofb_mode`)
+MODE_CTR = 6        #: Counter mode (:ref:`ctr_mode`)
+MODE_OPENPGP = 7    #: OpenPGP mode (:ref:`openpgp_mode`)
+MODE_CCM = 8        #: Counter with CBC-MAC (:ref:`ccm_mode`)
+MODE_EAX = 9        #: :ref:`eax_mode`
+MODE_SIV = 10       #: Synthetic Initialization Vector (:ref:`siv_mode`)
+MODE_GCM = 11       #: Galois Counter Mode (:ref:`gcm_mode`)
+MODE_OCB = 12       #: Offset Code Book (:ref:`ocb_mode`)
+
+
+_cproto = """
+        int AES_start_operation(const uint8_t key[],
+                                size_t key_len,
+                                void **pResult);
+        int AES_encrypt(const void *state,
+                        const uint8_t *in,
+                        uint8_t *out,
+                        size_t data_len);
+        int AES_decrypt(const void *state,
+                        const uint8_t *in,
+                        uint8_t *out,
+                        size_t data_len);
+        int AES_stop_operation(void *state);
+        """
+
+
+# Load portable AES
+_raw_aes_lib = load_pycryptodome_raw_lib("Crypto.Cipher._raw_aes",
+                                         _cproto)
+
+# Try to load AES with AES NI instructions
+try:
+    _raw_aesni_lib = None
+    if _cpu_features.have_aes_ni():
+        _raw_aesni_lib = load_pycryptodome_raw_lib("Crypto.Cipher._raw_aesni",
+                                                   _cproto.replace("AES",
+                                                                   "AESNI"))
+# _raw_aesni may not have been compiled in
+except OSError:
+    pass
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a handle to a low-level
+    base cipher. It will absorb named parameters in the process."""
+
+    use_aesni = dict_parameters.pop("use_aesni", True)
+
+    try:
+        key = dict_parameters.pop("key")
+    except KeyError:
+        raise TypeError("Missing 'key' parameter")
+
+    if len(key) not in key_size:
+        raise ValueError("Incorrect AES key length (%d bytes)" % len(key))
+
+    if use_aesni and _raw_aesni_lib:
+        start_operation = _raw_aesni_lib.AESNI_start_operation
+        stop_operation = _raw_aesni_lib.AESNI_stop_operation
+    else:
+        start_operation = _raw_aes_lib.AES_start_operation
+        stop_operation = _raw_aes_lib.AES_stop_operation
+
+    cipher = VoidPointer()
+    result = start_operation(c_uint8_ptr(key),
+                             c_size_t(len(key)),
+                             cipher.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the AES cipher"
+                         % result)
+    return SmartPointer(cipher.get(), stop_operation)
+
+
+def _derive_Poly1305_key_pair(key, nonce):
+    """Derive a tuple (r, s, nonce) for a Poly1305 MAC.
+
+    If nonce is ``None``, a new 16-byte nonce is generated.
+    """
+
+    if len(key) != 32:
+        raise ValueError("Poly1305 with AES requires a 32-byte key")
+
+    if nonce is None:
+        nonce = get_random_bytes(16)
+    elif len(nonce) != 16:
+        raise ValueError("Poly1305 with AES requires a 16-byte nonce")
+
+    s = new(key[:16], MODE_ECB).encrypt(nonce)
+    return key[16:], s, nonce
+
+
+def new(key, mode, *args, **kwargs):
+    """Create a new AES cipher.
+
+    Args:
+      key(bytes/bytearray/memoryview):
+        The secret key to use in the symmetric cipher.
+
+        It must be 16 (*AES-128)*, 24 (*AES-192*) or 32 (*AES-256*) bytes long.
+
+        For ``MODE_SIV`` only, it doubles to 32, 48, or 64 bytes.
+      mode (a ``MODE_*`` constant):
+        The chaining mode to use for encryption or decryption.
+        If in doubt, use ``MODE_EAX``.
+
+    Keyword Args:
+      iv (bytes/bytearray/memoryview):
+        (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``,
+        and ``MODE_OPENPGP`` modes).
+
+        The initialization vector to use for encryption or decryption.
+
+        For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 16 bytes long.
+
+        For ``MODE_OPENPGP`` mode only,
+        it must be 16 bytes long for encryption
+        and 18 bytes for decryption (in the latter case, it is
+        actually the *encrypted* IV which was prefixed to the ciphertext).
+
+        If not provided, a random byte string is generated (you must then
+        read its value with the :attr:`iv` attribute).
+
+      nonce (bytes/bytearray/memoryview):
+        (Only applicable for ``MODE_CCM``, ``MODE_EAX``, ``MODE_GCM``,
+        ``MODE_SIV``, ``MODE_OCB``, and ``MODE_CTR``).
+
+        A value that must never be reused for any other encryption done
+        with this key (except possibly for ``MODE_SIV``, see below).
+
+        For ``MODE_EAX``, ``MODE_GCM`` and ``MODE_SIV`` there are no
+        restrictions on its length (recommended: **16** bytes).
+
+        For ``MODE_CCM``, its length must be in the range **[7..13]**.
+        Bear in mind that with CCM there is a trade-off between nonce
+        length and maximum message size. Recommendation: **11** bytes.
+
+        For ``MODE_OCB``, its length must be in the range **[1..15]**
+        (recommended: **15**).
+
+        For ``MODE_CTR``, its length must be in the range **[0..15]**
+        (recommended: **8**).
+
+        For ``MODE_SIV``, the nonce is optional, if it is not specified,
+        then no nonce is being used, which renders the encryption
+        deterministic.
+
+        If not provided, for modes other than ``MODE_SIV``, a random
+        byte string of the recommended length is used (you must then
+        read its value with the :attr:`nonce` attribute).
+
+      segment_size (integer):
+        (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext
+        are segmented in. It must be a multiple of 8.
+        If not specified, it will be assumed to be 8.
+
+      mac_len (integer):
+        (Only ``MODE_EAX``, ``MODE_GCM``, ``MODE_OCB``, ``MODE_CCM``)
+        Length of the authentication tag, in bytes.
+
+        It must be even and in the range **[4..16]**.
+        The recommended value (and the default, if not specified) is **16**.
+
+      msg_len (integer):
+        (Only ``MODE_CCM``). Length of the message to (de)cipher.
+        If not specified, ``encrypt`` must be called with the entire message.
+        Similarly, ``decrypt`` can only be called once.
+
+      assoc_len (integer):
+        (Only ``MODE_CCM``). Length of the associated data.
+        If not specified, all associated data is buffered internally,
+        which may represent a problem for very large messages.
+
+      initial_value (integer or bytes/bytearray/memoryview):
+        (Only ``MODE_CTR``).
+        The initial value for the counter. If not present, the cipher will
+        start counting from 0. The value is incremented by one for each block.
+        The counter number is encoded in big endian mode.
+
+      counter (object):
+        (Only ``MODE_CTR``).
+        Instance of ``Crypto.Util.Counter``, which allows full customization
+        of the counter block. This parameter is incompatible to both ``nonce``
+        and ``initial_value``.
+
+      use_aesni: (boolean):
+        Use Intel AES-NI hardware extensions (default: use if available).
+
+    Returns:
+        an AES object, of the applicable mode.
+    """
+
+    kwargs["add_aes_modes"] = True
+    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
+
+
+# Size of a data block (in bytes)
+block_size = 16
+# Size of a key (in bytes)
+key_size = (16, 24, 32)

Lib/site-packages/Crypto/Cipher/AES.pyi

+from typing import Dict, Optional, Tuple, Union, overload
+from typing_extensions import Literal
+
+Buffer=bytes|bytearray|memoryview
+
+from Crypto.Cipher._mode_ecb import EcbMode
+from Crypto.Cipher._mode_cbc import CbcMode
+from Crypto.Cipher._mode_cfb import CfbMode
+from Crypto.Cipher._mode_ofb import OfbMode
+from Crypto.Cipher._mode_ctr import CtrMode
+from Crypto.Cipher._mode_openpgp import OpenPgpMode
+from Crypto.Cipher._mode_ccm import CcmMode
+from Crypto.Cipher._mode_eax import EaxMode
+from Crypto.Cipher._mode_gcm import GcmMode
+from Crypto.Cipher._mode_siv import SivMode
+from Crypto.Cipher._mode_ocb import OcbMode
+
+MODE_ECB: Literal[1]
+MODE_CBC: Literal[2]
+MODE_CFB: Literal[3]
+MODE_OFB: Literal[5]
+MODE_CTR: Literal[6]
+MODE_OPENPGP: Literal[7]
+MODE_CCM: Literal[8]
+MODE_EAX: Literal[9]
+MODE_SIV: Literal[10]
+MODE_GCM: Literal[11]
+MODE_OCB: Literal[12]
+
+# MODE_ECB
+@overload
+def new(key: Buffer,
+        mode: Literal[1],
+        use_aesni : bool = ...) -> \
+        EcbMode: ...
+
+# MODE_CBC
+@overload
+def new(key: Buffer,
+        mode: Literal[2],
+        iv : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        CbcMode: ...
+
+@overload
+def new(key: Buffer,
+        mode: Literal[2],
+        IV : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        CbcMode: ...
+
+# MODE_CFB
+@overload
+def new(key: Buffer,
+        mode: Literal[3],
+        iv : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        use_aesni : bool = ...) -> \
+        CfbMode: ...
+
+@overload
+def new(key: Buffer,
+        mode: Literal[3],
+        IV : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        use_aesni : bool = ...) -> \
+        CfbMode: ...
+
+# MODE_OFB
+@overload
+def new(key: Buffer,
+        mode: Literal[5],
+        iv : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        OfbMode: ...
+
+@overload
+def new(key: Buffer,
+        mode: Literal[5],
+        IV : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        OfbMode: ...
+
+# MODE_CTR
+@overload
+def new(key: Buffer,
+        mode: Literal[6],
+        nonce : Optional[Buffer] = ...,
+        initial_value : Union[int, Buffer] = ...,
+        counter : Dict = ...,
+        use_aesni : bool = ...) -> \
+        CtrMode: ...
+
+# MODE_OPENPGP
+@overload
+def new(key: Buffer,
+        mode: Literal[7],
+        iv : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        OpenPgpMode: ...
+
+@overload
+def new(key: Buffer,
+        mode: Literal[7],
+        IV : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        OpenPgpMode: ...
+
+# MODE_CCM
+@overload
+def new(key: Buffer,
+        mode: Literal[8],
+        nonce : Optional[Buffer] = ...,
+        mac_len : int = ...,
+        assoc_len : int = ...,
+        use_aesni : bool = ...) -> \
+        CcmMode: ...
+
+# MODE_EAX
+@overload
+def new(key: Buffer,
+        mode: Literal[9],
+        nonce : Optional[Buffer] = ...,
+        mac_len : int = ...,
+        use_aesni : bool = ...) -> \
+        EaxMode: ...
+
+# MODE_GCM
+@overload
+def new(key: Buffer,
+        mode: Literal[10],
+        nonce : Optional[Buffer] = ...,
+        use_aesni : bool = ...) -> \
+        SivMode: ...
+
+# MODE_SIV
+@overload
+def new(key: Buffer,
+        mode: Literal[11],
+        nonce : Optional[Buffer] = ...,
+        mac_len : int = ...,
+        use_aesni : bool = ...) -> \
+        GcmMode: ...
+
+# MODE_OCB
+@overload
+def new(key: Buffer,
+        mode: Literal[12],
+        nonce : Optional[Buffer] = ...,
+        mac_len : int = ...,
+        use_aesni : bool = ...) -> \
+        OcbMode: ...
+
+
+block_size: int
+key_size: Tuple[int, int, int]

Lib/site-packages/Crypto/Cipher/ARC2.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/ARC2.py : ARC2.py
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+"""
+Module's constants for the modes of operation supported with ARC2:
+
+:var MODE_ECB: :ref:`Electronic Code Book (ECB) <ecb_mode>`
+:var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) <cbc_mode>`
+:var MODE_CFB: :ref:`Cipher FeedBack (CFB) <cfb_mode>`
+:var MODE_OFB: :ref:`Output FeedBack (OFB) <ofb_mode>`
+:var MODE_CTR: :ref:`CounTer Mode (CTR) <ctr_mode>`
+:var MODE_OPENPGP:  :ref:`OpenPGP Mode <openpgp_mode>`
+:var MODE_EAX: :ref:`EAX Mode <eax_mode>`
+"""
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util.py3compat import byte_string
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  c_size_t, c_uint8_ptr)
+
+_raw_arc2_lib = load_pycryptodome_raw_lib(
+                        "Crypto.Cipher._raw_arc2",
+                        """
+                        int ARC2_start_operation(const uint8_t key[],
+                                                 size_t key_len,
+                                                 size_t effective_key_len,
+                                                 void **pResult);
+                        int ARC2_encrypt(const void *state,
+                                         const uint8_t *in,
+                                         uint8_t *out,
+                                         size_t data_len);
+                        int ARC2_decrypt(const void *state,
+                                         const uint8_t *in,
+                                         uint8_t *out,
+                                         size_t data_len);
+                        int ARC2_stop_operation(void *state);
+                        """
+                        )
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a handle to a low-level
+    base cipher. It will absorb named parameters in the process."""
+
+    try:
+        key = dict_parameters.pop("key")
+    except KeyError:
+        raise TypeError("Missing 'key' parameter")
+
+    effective_keylen = dict_parameters.pop("effective_keylen", 1024)
+
+    if len(key) not in key_size:
+        raise ValueError("Incorrect ARC2 key length (%d bytes)" % len(key))
+
+    if not (40 <= effective_keylen <= 1024):
+        raise ValueError("'effective_key_len' must be at least 40 and no larger than 1024 "
+                         "(not %d)" % effective_keylen)
+
+    start_operation = _raw_arc2_lib.ARC2_start_operation
+    stop_operation = _raw_arc2_lib.ARC2_stop_operation
+
+    cipher = VoidPointer()
+    result = start_operation(c_uint8_ptr(key),
+                             c_size_t(len(key)),
+                             c_size_t(effective_keylen),
+                             cipher.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the ARC2 cipher"
+                         % result)
+
+    return SmartPointer(cipher.get(), stop_operation)
+
+
+def new(key, mode, *args, **kwargs):
+    """Create a new RC2 cipher.
+
+    :param key:
+        The secret key to use in the symmetric cipher.
+        Its length can vary from 5 to 128 bytes; the actual search space
+        (and the cipher strength) can be reduced with the ``effective_keylen`` parameter.
+    :type key: bytes, bytearray, memoryview
+
+    :param mode:
+        The chaining mode to use for encryption or decryption.
+    :type mode: One of the supported ``MODE_*`` constants
+
+    :Keyword Arguments:
+        *   **iv** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``,
+            and ``MODE_OPENPGP`` modes).
+
+            The initialization vector to use for encryption or decryption.
+
+            For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 8 bytes long.
+
+            For ``MODE_OPENPGP`` mode only,
+            it must be 8 bytes long for encryption
+            and 10 bytes for decryption (in the latter case, it is
+            actually the *encrypted* IV which was prefixed to the ciphertext).
+
+            If not provided, a random byte string is generated (you must then
+            read its value with the :attr:`iv` attribute).
+
+        *   **nonce** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_EAX`` and ``MODE_CTR``).
+
+            A value that must never be reused for any other encryption done
+            with this key.
+
+            For ``MODE_EAX`` there are no
+            restrictions on its length (recommended: **16** bytes).
+
+            For ``MODE_CTR``, its length must be in the range **[0..7]**.
+
+            If not provided for ``MODE_EAX``, a random byte string is generated (you
+            can read it back via the ``nonce`` attribute).
+
+        *   **effective_keylen** (*integer*) --
+            Optional. Maximum strength in bits of the actual key used by the ARC2 algorithm.
+            If the supplied ``key`` parameter is longer (in bits) of the value specified
+            here, it will be weakened to match it.
+            If not specified, no limitation is applied.
+
+        *   **segment_size** (*integer*) --
+            (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext
+            are segmented in. It must be a multiple of 8.
+            If not specified, it will be assumed to be 8.
+
+        *   **mac_len** : (*integer*) --
+            (Only ``MODE_EAX``)
+            Length of the authentication tag, in bytes.
+            It must be no longer than 8 (default).
+
+        *   **initial_value** : (*integer*) --
+            (Only ``MODE_CTR``). The initial value for the counter within
+            the counter block. By default it is **0**.
+
+    :Return: an ARC2 object, of the applicable mode.
+    """
+
+    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
+
+MODE_ECB = 1
+MODE_CBC = 2
+MODE_CFB = 3
+MODE_OFB = 5
+MODE_CTR = 6
+MODE_OPENPGP = 7
+MODE_EAX = 9
+
+# Size of a data block (in bytes)
+block_size = 8
+# Size of a key (in bytes)
+key_size = range(5, 128 + 1)

Lib/site-packages/Crypto/Cipher/ARC2.pyi

+from typing import Union, Dict, Iterable, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+from Crypto.Cipher._mode_ecb import EcbMode
+from Crypto.Cipher._mode_cbc import CbcMode
+from Crypto.Cipher._mode_cfb import CfbMode
+from Crypto.Cipher._mode_ofb import OfbMode
+from Crypto.Cipher._mode_ctr import CtrMode
+from Crypto.Cipher._mode_openpgp import OpenPgpMode
+from Crypto.Cipher._mode_eax import EaxMode
+
+ARC2Mode = int
+
+MODE_ECB: ARC2Mode
+MODE_CBC: ARC2Mode
+MODE_CFB: ARC2Mode
+MODE_OFB: ARC2Mode
+MODE_CTR: ARC2Mode
+MODE_OPENPGP: ARC2Mode
+MODE_EAX: ARC2Mode
+
+def new(key: Buffer,
+        mode: ARC2Mode,
+        iv : Optional[Buffer] = ...,
+        IV : Optional[Buffer] = ...,
+        nonce : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        mac_len : int = ...,
+        initial_value : Union[int, Buffer] = ...,
+        counter : Dict = ...) -> \
+        Union[EcbMode, CbcMode, CfbMode, OfbMode, CtrMode, OpenPgpMode]: ...
+
+block_size: int
+key_size: Iterable[int]

Lib/site-packages/Crypto/Cipher/ARC4.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/ARC4.py : ARC4
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib, VoidPointer,
+                                  create_string_buffer, get_raw_buffer,
+                                  SmartPointer, c_size_t, c_uint8_ptr)
+
+
+_raw_arc4_lib = load_pycryptodome_raw_lib("Crypto.Cipher._ARC4", """
+                    int ARC4_stream_encrypt(void *rc4State, const uint8_t in[],
+                                            uint8_t out[], size_t len);
+                    int ARC4_stream_init(uint8_t *key, size_t keylen,
+                                         void **pRc4State);
+                    int ARC4_stream_destroy(void *rc4State);
+                    """)
+
+
+class ARC4Cipher:
+    """ARC4 cipher object. Do not create it directly. Use
+    :func:`Crypto.Cipher.ARC4.new` instead.
+    """
+
+    def __init__(self, key, *args, **kwargs):
+        """Initialize an ARC4 cipher object
+
+        See also `new()` at the module level."""
+
+        if len(args) > 0:
+            ndrop = args[0]
+            args = args[1:]
+        else:
+            ndrop = kwargs.pop('drop', 0)
+
+        if len(key) not in key_size:
+            raise ValueError("Incorrect ARC4 key length (%d bytes)" %
+                             len(key))
+
+        self._state = VoidPointer()
+        result = _raw_arc4_lib.ARC4_stream_init(c_uint8_ptr(key),
+                                                c_size_t(len(key)),
+                                                self._state.address_of())
+        if result != 0:
+            raise ValueError("Error %d while creating the ARC4 cipher"
+                             % result)
+        self._state = SmartPointer(self._state.get(),
+                                   _raw_arc4_lib.ARC4_stream_destroy)
+
+        if ndrop > 0:
+            # This is OK even if the cipher is used for decryption,
+            # since encrypt and decrypt are actually the same thing
+            # with ARC4.
+            self.encrypt(b'\x00' * ndrop)
+
+        self.block_size = 1
+        self.key_size = len(key)
+
+    def encrypt(self, plaintext):
+        """Encrypt a piece of data.
+
+        :param plaintext: The data to encrypt, of any size.
+        :type plaintext: bytes, bytearray, memoryview
+        :returns: the encrypted byte string, of equal length as the
+          plaintext.
+        """
+
+        ciphertext = create_string_buffer(len(plaintext))
+        result = _raw_arc4_lib.ARC4_stream_encrypt(self._state.get(),
+                                                   c_uint8_ptr(plaintext),
+                                                   ciphertext,
+                                                   c_size_t(len(plaintext)))
+        if result:
+            raise ValueError("Error %d while encrypting with RC4" % result)
+        return get_raw_buffer(ciphertext)
+
+    def decrypt(self, ciphertext):
+        """Decrypt a piece of data.
+
+        :param ciphertext: The data to decrypt, of any size.
+        :type ciphertext: bytes, bytearray, memoryview
+        :returns: the decrypted byte string, of equal length as the
+          ciphertext.
+        """
+
+        try:
+            return self.encrypt(ciphertext)
+        except ValueError as e:
+            raise ValueError(str(e).replace("enc", "dec"))
+
+
+def new(key, *args, **kwargs):
+    """Create a new ARC4 cipher.
+
+    :param key:
+        The secret key to use in the symmetric cipher.
+        Its length must be in the range ``[1..256]``.
+        The recommended length is 16 bytes.
+    :type key: bytes, bytearray, memoryview
+
+    :Keyword Arguments:
+        *   *drop* (``integer``) --
+            The amount of bytes to discard from the initial part of the keystream.
+            In fact, such part has been found to be distinguishable from random
+            data (while it shouldn't) and also correlated to key.
+
+            The recommended value is 3072_ bytes. The default value is 0.
+
+    :Return: an `ARC4Cipher` object
+
+    .. _3072: http://eprint.iacr.org/2002/067.pdf
+    """
+    return ARC4Cipher(key, *args, **kwargs)
+
+
+# Size of a data block (in bytes)
+block_size = 1
+# Size of a key (in bytes)
+key_size = range(1, 256+1)

Lib/site-packages/Crypto/Cipher/ARC4.pyi

+from typing import Any, Union, Iterable
+
+Buffer = bytes|bytearray|memoryview
+
+class ARC4Cipher:
+    block_size: int
+    key_size: int
+
+    def __init__(self, key: Buffer, *args: Any, **kwargs: Any) -> None: ...
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    def decrypt(self, ciphertext: Buffer) -> bytes: ...
+
+def new(key: Buffer, drop : int = ...) -> ARC4Cipher: ...
+
+block_size: int
+key_size: Iterable[int]

Lib/site-packages/Crypto/Cipher/Blowfish.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/Blowfish.py : Blowfish
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+"""
+Module's constants for the modes of operation supported with Blowfish:
+
+:var MODE_ECB: :ref:`Electronic Code Book (ECB) <ecb_mode>`
+:var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) <cbc_mode>`
+:var MODE_CFB: :ref:`Cipher FeedBack (CFB) <cfb_mode>`
+:var MODE_OFB: :ref:`Output FeedBack (OFB) <ofb_mode>`
+:var MODE_CTR: :ref:`CounTer Mode (CTR) <ctr_mode>`
+:var MODE_OPENPGP:  :ref:`OpenPGP Mode <openpgp_mode>`
+:var MODE_EAX: :ref:`EAX Mode <eax_mode>`
+"""
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer, c_size_t,
+                                  c_uint8_ptr)
+
+_raw_blowfish_lib = load_pycryptodome_raw_lib(
+        "Crypto.Cipher._raw_blowfish",
+        """
+        int Blowfish_start_operation(const uint8_t key[],
+                                     size_t key_len,
+                                     void **pResult);
+        int Blowfish_encrypt(const void *state,
+                             const uint8_t *in,
+                             uint8_t *out,
+                             size_t data_len);
+        int Blowfish_decrypt(const void *state,
+                             const uint8_t *in,
+                             uint8_t *out,
+                             size_t data_len);
+        int Blowfish_stop_operation(void *state);
+        """
+        )
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a smart pointer to
+    a low-level base cipher. It will absorb named parameters in
+    the process."""
+
+    try:
+        key = dict_parameters.pop("key")
+    except KeyError:
+        raise TypeError("Missing 'key' parameter")
+
+    if len(key) not in key_size:
+        raise ValueError("Incorrect Blowfish key length (%d bytes)" % len(key))
+
+    start_operation = _raw_blowfish_lib.Blowfish_start_operation
+    stop_operation = _raw_blowfish_lib.Blowfish_stop_operation
+
+    void_p = VoidPointer()
+    result = start_operation(c_uint8_ptr(key),
+                             c_size_t(len(key)),
+                             void_p.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the Blowfish cipher"
+                         % result)
+    return SmartPointer(void_p.get(), stop_operation)
+
+
+def new(key, mode, *args, **kwargs):
+    """Create a new Blowfish cipher
+
+    :param key:
+        The secret key to use in the symmetric cipher.
+        Its length can vary from 5 to 56 bytes.
+    :type key: bytes, bytearray, memoryview
+
+    :param mode:
+        The chaining mode to use for encryption or decryption.
+    :type mode: One of the supported ``MODE_*`` constants
+
+    :Keyword Arguments:
+        *   **iv** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``,
+            and ``MODE_OPENPGP`` modes).
+
+            The initialization vector to use for encryption or decryption.
+
+            For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 8 bytes long.
+
+            For ``MODE_OPENPGP`` mode only,
+            it must be 8 bytes long for encryption
+            and 10 bytes for decryption (in the latter case, it is
+            actually the *encrypted* IV which was prefixed to the ciphertext).
+
+            If not provided, a random byte string is generated (you must then
+            read its value with the :attr:`iv` attribute).
+
+        *   **nonce** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_EAX`` and ``MODE_CTR``).
+
+            A value that must never be reused for any other encryption done
+            with this key.
+
+            For ``MODE_EAX`` there are no
+            restrictions on its length (recommended: **16** bytes).
+
+            For ``MODE_CTR``, its length must be in the range **[0..7]**.
+
+            If not provided for ``MODE_EAX``, a random byte string is generated (you
+            can read it back via the ``nonce`` attribute).
+
+        *   **segment_size** (*integer*) --
+            (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext
+            are segmented in. It must be a multiple of 8.
+            If not specified, it will be assumed to be 8.
+
+        *   **mac_len** : (*integer*) --
+            (Only ``MODE_EAX``)
+            Length of the authentication tag, in bytes.
+            It must be no longer than 8 (default).
+
+        *   **initial_value** : (*integer*) --
+            (Only ``MODE_CTR``). The initial value for the counter within
+            the counter block. By default it is **0**.
+
+    :Return: a Blowfish object, of the applicable mode.
+    """
+
+    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
+
+MODE_ECB = 1
+MODE_CBC = 2
+MODE_CFB = 3
+MODE_OFB = 5
+MODE_CTR = 6
+MODE_OPENPGP = 7
+MODE_EAX = 9
+
+# Size of a data block (in bytes)
+block_size = 8
+# Size of a key (in bytes)
+key_size = range(4, 56 + 1)

Lib/site-packages/Crypto/Cipher/Blowfish.pyi

+from typing import Union, Dict, Iterable, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+from Crypto.Cipher._mode_ecb import EcbMode
+from Crypto.Cipher._mode_cbc import CbcMode
+from Crypto.Cipher._mode_cfb import CfbMode
+from Crypto.Cipher._mode_ofb import OfbMode
+from Crypto.Cipher._mode_ctr import CtrMode
+from Crypto.Cipher._mode_openpgp import OpenPgpMode
+from Crypto.Cipher._mode_eax import EaxMode
+
+BlowfishMode = int
+
+MODE_ECB: BlowfishMode
+MODE_CBC: BlowfishMode
+MODE_CFB: BlowfishMode
+MODE_OFB: BlowfishMode
+MODE_CTR: BlowfishMode
+MODE_OPENPGP: BlowfishMode
+MODE_EAX: BlowfishMode
+
+def new(key: Buffer,
+        mode: BlowfishMode,
+        iv : Optional[Buffer] = ...,
+        IV : Optional[Buffer] = ...,
+        nonce : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        mac_len : int = ...,
+        initial_value : Union[int, Buffer] = ...,
+        counter : Dict = ...) -> \
+        Union[EcbMode, CbcMode, CfbMode, OfbMode, CtrMode, OpenPgpMode]: ...
+
+block_size: int
+key_size: Iterable[int]

Lib/site-packages/Crypto/Cipher/CAST.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/CAST.py : CAST
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+"""
+Module's constants for the modes of operation supported with CAST:
+
+:var MODE_ECB: :ref:`Electronic Code Book (ECB) <ecb_mode>`
+:var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) <cbc_mode>`
+:var MODE_CFB: :ref:`Cipher FeedBack (CFB) <cfb_mode>`
+:var MODE_OFB: :ref:`Output FeedBack (OFB) <ofb_mode>`
+:var MODE_CTR: :ref:`CounTer Mode (CTR) <ctr_mode>`
+:var MODE_OPENPGP:  :ref:`OpenPGP Mode <openpgp_mode>`
+:var MODE_EAX: :ref:`EAX Mode <eax_mode>`
+"""
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util.py3compat import byte_string
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  c_size_t, c_uint8_ptr)
+
+_raw_cast_lib = load_pycryptodome_raw_lib(
+                    "Crypto.Cipher._raw_cast",
+                    """
+                    int CAST_start_operation(const uint8_t key[],
+                                             size_t key_len,
+                                             void **pResult);
+                    int CAST_encrypt(const void *state,
+                                     const uint8_t *in,
+                                     uint8_t *out,
+                                     size_t data_len);
+                    int CAST_decrypt(const void *state,
+                                     const uint8_t *in,
+                                     uint8_t *out,
+                                     size_t data_len);
+                    int CAST_stop_operation(void *state);
+                    """)
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a handle to a low-level
+    base cipher. It will absorb named parameters in the process."""
+
+    try:
+        key = dict_parameters.pop("key")
+    except KeyError:
+        raise TypeError("Missing 'key' parameter")
+
+    if len(key) not in key_size:
+        raise ValueError("Incorrect CAST key length (%d bytes)" % len(key))
+
+    start_operation = _raw_cast_lib.CAST_start_operation
+    stop_operation = _raw_cast_lib.CAST_stop_operation
+
+    cipher = VoidPointer()
+    result = start_operation(c_uint8_ptr(key),
+                             c_size_t(len(key)),
+                             cipher.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the CAST cipher"
+                         % result)
+
+    return SmartPointer(cipher.get(), stop_operation)
+
+
+def new(key, mode, *args, **kwargs):
+    """Create a new CAST cipher
+
+    :param key:
+        The secret key to use in the symmetric cipher.
+        Its length can vary from 5 to 16 bytes.
+    :type key: bytes, bytearray, memoryview
+
+    :param mode:
+        The chaining mode to use for encryption or decryption.
+    :type mode: One of the supported ``MODE_*`` constants
+
+    :Keyword Arguments:
+        *   **iv** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``,
+            and ``MODE_OPENPGP`` modes).
+
+            The initialization vector to use for encryption or decryption.
+
+            For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 8 bytes long.
+
+            For ``MODE_OPENPGP`` mode only,
+            it must be 8 bytes long for encryption
+            and 10 bytes for decryption (in the latter case, it is
+            actually the *encrypted* IV which was prefixed to the ciphertext).
+
+            If not provided, a random byte string is generated (you must then
+            read its value with the :attr:`iv` attribute).
+
+        *   **nonce** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_EAX`` and ``MODE_CTR``).
+
+            A value that must never be reused for any other encryption done
+            with this key.
+
+            For ``MODE_EAX`` there are no
+            restrictions on its length (recommended: **16** bytes).
+
+            For ``MODE_CTR``, its length must be in the range **[0..7]**.
+
+            If not provided for ``MODE_EAX``, a random byte string is generated (you
+            can read it back via the ``nonce`` attribute).
+
+        *   **segment_size** (*integer*) --
+            (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext
+            are segmented in. It must be a multiple of 8.
+            If not specified, it will be assumed to be 8.
+
+        *   **mac_len** : (*integer*) --
+            (Only ``MODE_EAX``)
+            Length of the authentication tag, in bytes.
+            It must be no longer than 8 (default).
+
+        *   **initial_value** : (*integer*) --
+            (Only ``MODE_CTR``). The initial value for the counter within
+            the counter block. By default it is **0**.
+
+    :Return: a CAST object, of the applicable mode.
+    """
+
+    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
+
+MODE_ECB = 1
+MODE_CBC = 2
+MODE_CFB = 3
+MODE_OFB = 5
+MODE_CTR = 6
+MODE_OPENPGP = 7
+MODE_EAX = 9
+
+# Size of a data block (in bytes)
+block_size = 8
+# Size of a key (in bytes)
+key_size = range(5, 16 + 1)

Lib/site-packages/Crypto/Cipher/CAST.pyi

+from typing import Union, Dict, Iterable, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+from Crypto.Cipher._mode_ecb import EcbMode
+from Crypto.Cipher._mode_cbc import CbcMode
+from Crypto.Cipher._mode_cfb import CfbMode
+from Crypto.Cipher._mode_ofb import OfbMode
+from Crypto.Cipher._mode_ctr import CtrMode
+from Crypto.Cipher._mode_openpgp import OpenPgpMode
+from Crypto.Cipher._mode_eax import EaxMode
+
+CASTMode = int
+
+MODE_ECB: CASTMode
+MODE_CBC: CASTMode
+MODE_CFB: CASTMode
+MODE_OFB: CASTMode
+MODE_CTR: CASTMode
+MODE_OPENPGP: CASTMode
+MODE_EAX: CASTMode
+
+def new(key: Buffer,
+        mode: CASTMode,
+        iv : Optional[Buffer] = ...,
+        IV : Optional[Buffer] = ...,
+        nonce : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        mac_len : int = ...,
+        initial_value : Union[int, Buffer] = ...,
+        counter : Dict = ...) -> \
+        Union[EcbMode, CbcMode, CfbMode, OfbMode, CtrMode, OpenPgpMode]: ...
+
+block_size: int
+key_size : Iterable[int]

Lib/site-packages/Crypto/Cipher/ChaCha20.pyi

+from typing import Union, overload, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+def _HChaCha20(key: Buffer, nonce: Buffer) -> bytearray: ...
+
+class ChaCha20Cipher:
+    block_size: int
+    nonce: bytes
+
+    def __init__(self, key: Buffer, nonce: Buffer) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    def seek(self, position: int) -> None: ...
+
+def new(key: Buffer, nonce: Optional[Buffer] = ...) -> ChaCha20Cipher: ...
+
+block_size: int
+key_size: int

Lib/site-packages/Crypto/Cipher/ChaCha20_Poly1305.pyi

+from typing import Union, Tuple, overload, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+class ChaCha20Poly1305Cipher:
+    nonce: bytes
+
+    def __init__(self, key: Buffer, nonce: Buffer) -> None: ...
+    def update(self, data: Buffer) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, received_mac_tag: Buffer) -> None: ...
+    def hexverify(self, received_mac_tag: str) -> None: ...
+    def encrypt_and_digest(self, plaintext: Buffer) -> Tuple[bytes, bytes]: ...
+    def decrypt_and_verify(self, ciphertext: Buffer, received_mac_tag: Buffer) -> bytes: ...
+
+def new(key: Buffer, nonce: Optional[Buffer] = ...) -> ChaCha20Poly1305Cipher: ...
+
+block_size: int
+key_size: int

Lib/site-packages/Crypto/Cipher/DES.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/DES.py : DES
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+"""
+Module's constants for the modes of operation supported with Single DES:
+
+:var MODE_ECB: :ref:`Electronic Code Book (ECB) <ecb_mode>`
+:var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) <cbc_mode>`
+:var MODE_CFB: :ref:`Cipher FeedBack (CFB) <cfb_mode>`
+:var MODE_OFB: :ref:`Output FeedBack (OFB) <ofb_mode>`
+:var MODE_CTR: :ref:`CounTer Mode (CTR) <ctr_mode>`
+:var MODE_OPENPGP:  :ref:`OpenPGP Mode <openpgp_mode>`
+:var MODE_EAX: :ref:`EAX Mode <eax_mode>`
+"""
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util.py3compat import byte_string
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  c_size_t, c_uint8_ptr)
+
+_raw_des_lib = load_pycryptodome_raw_lib(
+                "Crypto.Cipher._raw_des",
+                """
+                int DES_start_operation(const uint8_t key[],
+                                        size_t key_len,
+                                        void **pResult);
+                int DES_encrypt(const void *state,
+                                const uint8_t *in,
+                                uint8_t *out,
+                                size_t data_len);
+                int DES_decrypt(const void *state,
+                                const uint8_t *in,
+                                uint8_t *out,
+                                size_t data_len);
+                int DES_stop_operation(void *state);
+                """)
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a handle to a low-level
+    base cipher. It will absorb named parameters in the process."""
+
+    try:
+        key = dict_parameters.pop("key")
+    except KeyError:
+        raise TypeError("Missing 'key' parameter")
+
+    if len(key) != key_size:
+        raise ValueError("Incorrect DES key length (%d bytes)" % len(key))
+
+    start_operation = _raw_des_lib.DES_start_operation
+    stop_operation = _raw_des_lib.DES_stop_operation
+
+    cipher = VoidPointer()
+    result = start_operation(c_uint8_ptr(key),
+                             c_size_t(len(key)),
+                             cipher.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the DES cipher"
+                         % result)
+    return SmartPointer(cipher.get(), stop_operation)
+
+
+def new(key, mode, *args, **kwargs):
+    """Create a new DES cipher.
+
+    :param key:
+        The secret key to use in the symmetric cipher.
+        It must be 8 byte long. The parity bits will be ignored.
+    :type key: bytes/bytearray/memoryview
+
+    :param mode:
+        The chaining mode to use for encryption or decryption.
+    :type mode: One of the supported ``MODE_*`` constants
+
+    :Keyword Arguments:
+        *   **iv** (*byte string*) --
+            (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``,
+            and ``MODE_OPENPGP`` modes).
+
+            The initialization vector to use for encryption or decryption.
+
+            For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 8 bytes long.
+
+            For ``MODE_OPENPGP`` mode only,
+            it must be 8 bytes long for encryption
+            and 10 bytes for decryption (in the latter case, it is
+            actually the *encrypted* IV which was prefixed to the ciphertext).
+
+            If not provided, a random byte string is generated (you must then
+            read its value with the :attr:`iv` attribute).
+
+        *   **nonce** (*byte string*) --
+            (Only applicable for ``MODE_EAX`` and ``MODE_CTR``).
+
+            A value that must never be reused for any other encryption done
+            with this key.
+
+            For ``MODE_EAX`` there are no
+            restrictions on its length (recommended: **16** bytes).
+
+            For ``MODE_CTR``, its length must be in the range **[0..7]**.
+
+            If not provided for ``MODE_EAX``, a random byte string is generated (you
+            can read it back via the ``nonce`` attribute).
+
+        *   **segment_size** (*integer*) --
+            (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext
+            are segmented in. It must be a multiple of 8.
+            If not specified, it will be assumed to be 8.
+
+        *   **mac_len** : (*integer*) --
+            (Only ``MODE_EAX``)
+            Length of the authentication tag, in bytes.
+            It must be no longer than 8 (default).
+
+        *   **initial_value** : (*integer*) --
+            (Only ``MODE_CTR``). The initial value for the counter within
+            the counter block. By default it is **0**.
+
+    :Return: a DES object, of the applicable mode.
+    """
+
+    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
+
+MODE_ECB = 1
+MODE_CBC = 2
+MODE_CFB = 3
+MODE_OFB = 5
+MODE_CTR = 6
+MODE_OPENPGP = 7
+MODE_EAX = 9
+
+# Size of a data block (in bytes)
+block_size = 8
+# Size of a key (in bytes)
+key_size = 8

Lib/site-packages/Crypto/Cipher/DES.pyi

+from typing import Union, Dict, Iterable, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+from Crypto.Cipher._mode_ecb import EcbMode
+from Crypto.Cipher._mode_cbc import CbcMode
+from Crypto.Cipher._mode_cfb import CfbMode
+from Crypto.Cipher._mode_ofb import OfbMode
+from Crypto.Cipher._mode_ctr import CtrMode
+from Crypto.Cipher._mode_openpgp import OpenPgpMode
+from Crypto.Cipher._mode_eax import EaxMode
+
+DESMode = int
+
+MODE_ECB: DESMode
+MODE_CBC: DESMode
+MODE_CFB: DESMode
+MODE_OFB: DESMode
+MODE_CTR: DESMode
+MODE_OPENPGP: DESMode
+MODE_EAX: DESMode
+
+def new(key: Buffer,
+        mode: DESMode,
+        iv : Optional[Buffer] = ...,
+        IV : Optional[Buffer] = ...,
+        nonce : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        mac_len : int = ...,
+        initial_value : Union[int, Buffer] = ...,
+        counter : Dict = ...) -> \
+        Union[EcbMode, CbcMode, CfbMode, OfbMode, CtrMode, OpenPgpMode]: ...
+
+block_size: int
+key_size: int

Lib/site-packages/Crypto/Cipher/DES3.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/DES3.py : DES3
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+"""
+Module's constants for the modes of operation supported with Triple DES:
+
+:var MODE_ECB: :ref:`Electronic Code Book (ECB) <ecb_mode>`
+:var MODE_CBC: :ref:`Cipher-Block Chaining (CBC) <cbc_mode>`
+:var MODE_CFB: :ref:`Cipher FeedBack (CFB) <cfb_mode>`
+:var MODE_OFB: :ref:`Output FeedBack (OFB) <ofb_mode>`
+:var MODE_CTR: :ref:`CounTer Mode (CTR) <ctr_mode>`
+:var MODE_OPENPGP:  :ref:`OpenPGP Mode <openpgp_mode>`
+:var MODE_EAX: :ref:`EAX Mode <eax_mode>`
+"""
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util.py3compat import byte_string, bchr, bord, bstr
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  c_size_t)
+
+_raw_des3_lib = load_pycryptodome_raw_lib(
+                    "Crypto.Cipher._raw_des3",
+                    """
+                    int DES3_start_operation(const uint8_t key[],
+                                             size_t key_len,
+                                             void **pResult);
+                    int DES3_encrypt(const void *state,
+                                     const uint8_t *in,
+                                     uint8_t *out,
+                                     size_t data_len);
+                    int DES3_decrypt(const void *state,
+                                     const uint8_t *in,
+                                     uint8_t *out,
+                                     size_t data_len);
+                    int DES3_stop_operation(void *state);
+                    """)
+
+
+def adjust_key_parity(key_in):
+    """Set the parity bits in a TDES key.
+
+    :param key_in: the TDES key whose bits need to be adjusted
+    :type key_in: byte string
+
+    :returns: a copy of ``key_in``, with the parity bits correctly set
+    :rtype: byte string
+
+    :raises ValueError: if the TDES key is not 16 or 24 bytes long
+    :raises ValueError: if the TDES key degenerates into Single DES
+    """
+
+    def parity_byte(key_byte):
+        parity = 1
+        for i in range(1, 8):
+            parity ^= (key_byte >> i) & 1
+        return (key_byte & 0xFE) | parity
+
+    if len(key_in) not in key_size:
+        raise ValueError("Not a valid TDES key")
+
+    key_out = b"".join([ bchr(parity_byte(bord(x))) for x in key_in ])
+
+    if key_out[:8] == key_out[8:16] or key_out[-16:-8] == key_out[-8:]:
+        raise ValueError("Triple DES key degenerates to single DES")
+
+    return key_out
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a handle to a low-level base cipher.
+    It will absorb named parameters in the process."""
+
+    try:
+        key_in = dict_parameters.pop("key")
+    except KeyError:
+        raise TypeError("Missing 'key' parameter")
+
+    key = adjust_key_parity(bstr(key_in))
+
+    start_operation = _raw_des3_lib.DES3_start_operation
+    stop_operation = _raw_des3_lib.DES3_stop_operation
+
+    cipher = VoidPointer()
+    result = start_operation(key,
+                             c_size_t(len(key)),
+                             cipher.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the TDES cipher"
+                         % result)
+    return SmartPointer(cipher.get(), stop_operation)
+
+
+def new(key, mode, *args, **kwargs):
+    """Create a new Triple DES cipher.
+
+    :param key:
+        The secret key to use in the symmetric cipher.
+        It must be 16 or 24 byte long. The parity bits will be ignored.
+    :type key: bytes/bytearray/memoryview
+
+    :param mode:
+        The chaining mode to use for encryption or decryption.
+    :type mode: One of the supported ``MODE_*`` constants
+
+    :Keyword Arguments:
+        *   **iv** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_CBC``, ``MODE_CFB``, ``MODE_OFB``,
+            and ``MODE_OPENPGP`` modes).
+
+            The initialization vector to use for encryption or decryption.
+
+            For ``MODE_CBC``, ``MODE_CFB``, and ``MODE_OFB`` it must be 8 bytes long.
+
+            For ``MODE_OPENPGP`` mode only,
+            it must be 8 bytes long for encryption
+            and 10 bytes for decryption (in the latter case, it is
+            actually the *encrypted* IV which was prefixed to the ciphertext).
+
+            If not provided, a random byte string is generated (you must then
+            read its value with the :attr:`iv` attribute).
+
+        *   **nonce** (*bytes*, *bytearray*, *memoryview*) --
+            (Only applicable for ``MODE_EAX`` and ``MODE_CTR``).
+
+            A value that must never be reused for any other encryption done
+            with this key.
+
+            For ``MODE_EAX`` there are no
+            restrictions on its length (recommended: **16** bytes).
+
+            For ``MODE_CTR``, its length must be in the range **[0..7]**.
+
+            If not provided for ``MODE_EAX``, a random byte string is generated (you
+            can read it back via the ``nonce`` attribute).
+
+        *   **segment_size** (*integer*) --
+            (Only ``MODE_CFB``).The number of **bits** the plaintext and ciphertext
+            are segmented in. It must be a multiple of 8.
+            If not specified, it will be assumed to be 8.
+
+        *   **mac_len** : (*integer*) --
+            (Only ``MODE_EAX``)
+            Length of the authentication tag, in bytes.
+            It must be no longer than 8 (default).
+
+        *   **initial_value** : (*integer*) --
+            (Only ``MODE_CTR``). The initial value for the counter within
+            the counter block. By default it is **0**.
+
+    :Return: a Triple DES object, of the applicable mode.
+    """
+
+    return _create_cipher(sys.modules[__name__], key, mode, *args, **kwargs)
+
+MODE_ECB = 1
+MODE_CBC = 2
+MODE_CFB = 3
+MODE_OFB = 5
+MODE_CTR = 6
+MODE_OPENPGP = 7
+MODE_EAX = 9
+
+# Size of a data block (in bytes)
+block_size = 8
+# Size of a key (in bytes)
+key_size = (16, 24)

Lib/site-packages/Crypto/Cipher/DES3.pyi

+from typing import Union, Dict, Tuple, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+from Crypto.Cipher._mode_ecb import EcbMode
+from Crypto.Cipher._mode_cbc import CbcMode
+from Crypto.Cipher._mode_cfb import CfbMode
+from Crypto.Cipher._mode_ofb import OfbMode
+from Crypto.Cipher._mode_ctr import CtrMode
+from Crypto.Cipher._mode_openpgp import OpenPgpMode
+from Crypto.Cipher._mode_eax import EaxMode
+
+def adjust_key_parity(key_in: bytes) -> bytes: ...
+
+DES3Mode = int
+
+MODE_ECB: DES3Mode
+MODE_CBC: DES3Mode
+MODE_CFB: DES3Mode
+MODE_OFB: DES3Mode
+MODE_CTR: DES3Mode
+MODE_OPENPGP: DES3Mode
+MODE_EAX: DES3Mode
+
+def new(key: Buffer,
+        mode: DES3Mode,
+        iv : Optional[Buffer] = ...,
+        IV : Optional[Buffer] = ...,
+        nonce : Optional[Buffer] = ...,
+        segment_size : int = ...,
+        mac_len : int = ...,
+        initial_value : Union[int, Buffer] = ...,
+        counter : Dict = ...) -> \
+        Union[EcbMode, CbcMode, CfbMode, OfbMode, CtrMode, OpenPgpMode]: ...
+
+block_size: int
+key_size: Tuple[int, int]

Lib/site-packages/Crypto/Cipher/PKCS1_OAEP.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/PKCS1_OAEP.py : PKCS#1 OAEP
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+from Crypto.Signature.pss import MGF1
+import Crypto.Hash.SHA1
+
+from Crypto.Util.py3compat import _copy_bytes
+import Crypto.Util.number
+from Crypto.Util.number import ceil_div, bytes_to_long, long_to_bytes
+from Crypto.Util.strxor import strxor
+from Crypto import Random
+from ._pkcs1_oaep_decode import oaep_decode
+
+
+class PKCS1OAEP_Cipher:
+    """Cipher object for PKCS#1 v1.5 OAEP.
+    Do not create directly: use :func:`new` instead."""
+
+    def __init__(self, key, hashAlgo, mgfunc, label, randfunc):
+        """Initialize this PKCS#1 OAEP cipher object.
+
+        :Parameters:
+         key : an RSA key object
+                If a private half is given, both encryption and decryption are possible.
+                If a public half is given, only encryption is possible.
+         hashAlgo : hash object
+                The hash function to use. This can be a module under `Crypto.Hash`
+                or an existing hash object created from any of such modules. If not specified,
+                `Crypto.Hash.SHA1` is used.
+         mgfunc : callable
+                A mask generation function that accepts two parameters: a string to
+                use as seed, and the lenth of the mask to generate, in bytes.
+                If not specified, the standard MGF1 consistent with ``hashAlgo`` is used (a safe choice).
+         label : bytes/bytearray/memoryview
+                A label to apply to this particular encryption. If not specified,
+                an empty string is used. Specifying a label does not improve
+                security.
+         randfunc : callable
+                A function that returns random bytes.
+
+        :attention: Modify the mask generation function only if you know what you are doing.
+                    Sender and receiver must use the same one.
+        """
+        self._key = key
+
+        if hashAlgo:
+            self._hashObj = hashAlgo
+        else:
+            self._hashObj = Crypto.Hash.SHA1
+
+        if mgfunc:
+            self._mgf = mgfunc
+        else:
+            self._mgf = lambda x, y: MGF1(x, y, self._hashObj)
+
+        self._label = _copy_bytes(None, None, label)
+        self._randfunc = randfunc
+
+    def can_encrypt(self):
+        """Legacy function to check if you can call :meth:`encrypt`.
+
+        .. deprecated:: 3.0"""
+        return self._key.can_encrypt()
+
+    def can_decrypt(self):
+        """Legacy function to check if you can call :meth:`decrypt`.
+
+        .. deprecated:: 3.0"""
+        return self._key.can_decrypt()
+
+    def encrypt(self, message):
+        """Encrypt a message with PKCS#1 OAEP.
+
+        :param message:
+            The message to encrypt, also known as plaintext. It can be of
+            variable length, but not longer than the RSA modulus (in bytes)
+            minus 2, minus twice the hash output size.
+            For instance, if you use RSA 2048 and SHA-256, the longest message
+            you can encrypt is 190 byte long.
+        :type message: bytes/bytearray/memoryview
+
+        :returns: The ciphertext, as large as the RSA modulus.
+        :rtype: bytes
+
+        :raises ValueError:
+            if the message is too long.
+        """
+
+        # See 7.1.1 in RFC3447
+        modBits = Crypto.Util.number.size(self._key.n)
+        k = ceil_div(modBits, 8)            # Convert from bits to bytes
+        hLen = self._hashObj.digest_size
+        mLen = len(message)
+
+        # Step 1b
+        ps_len = k - mLen - 2 * hLen - 2
+        if ps_len < 0:
+            raise ValueError("Plaintext is too long.")
+        # Step 2a
+        lHash = self._hashObj.new(self._label).digest()
+        # Step 2b
+        ps = b'\x00' * ps_len
+        # Step 2c
+        db = lHash + ps + b'\x01' + _copy_bytes(None, None, message)
+        # Step 2d
+        ros = self._randfunc(hLen)
+        # Step 2e
+        dbMask = self._mgf(ros, k-hLen-1)
+        # Step 2f
+        maskedDB = strxor(db, dbMask)
+        # Step 2g
+        seedMask = self._mgf(maskedDB, hLen)
+        # Step 2h
+        maskedSeed = strxor(ros, seedMask)
+        # Step 2i
+        em = b'\x00' + maskedSeed + maskedDB
+        # Step 3a (OS2IP)
+        em_int = bytes_to_long(em)
+        # Step 3b (RSAEP)
+        m_int = self._key._encrypt(em_int)
+        # Step 3c (I2OSP)
+        c = long_to_bytes(m_int, k)
+        return c
+
+    def decrypt(self, ciphertext):
+        """Decrypt a message with PKCS#1 OAEP.
+
+        :param ciphertext: The encrypted message.
+        :type ciphertext: bytes/bytearray/memoryview
+
+        :returns: The original message (plaintext).
+        :rtype: bytes
+
+        :raises ValueError:
+            if the ciphertext has the wrong length, or if decryption
+            fails the integrity check (in which case, the decryption
+            key is probably wrong).
+        :raises TypeError:
+            if the RSA key has no private half (i.e. you are trying
+            to decrypt using a public key).
+        """
+
+        # See 7.1.2 in RFC3447
+        modBits = Crypto.Util.number.size(self._key.n)
+        k = ceil_div(modBits, 8)            # Convert from bits to bytes
+        hLen = self._hashObj.digest_size
+
+        # Step 1b and 1c
+        if len(ciphertext) != k or k < hLen+2:
+            raise ValueError("Ciphertext with incorrect length.")
+        # Step 2a (O2SIP)
+        ct_int = bytes_to_long(ciphertext)
+        # Step 2b (RSADP) and step 2c (I2OSP)
+        em = self._key._decrypt_to_bytes(ct_int)
+        # Step 3a
+        lHash = self._hashObj.new(self._label).digest()
+        # y must be 0, but we MUST NOT check it here in order not to
+        # allow attacks like Manger's (http://dl.acm.org/citation.cfm?id=704143)
+        maskedSeed = em[1:hLen+1]
+        maskedDB = em[hLen+1:]
+        # Step 3c
+        seedMask = self._mgf(maskedDB, hLen)
+        # Step 3d
+        seed = strxor(maskedSeed, seedMask)
+        # Step 3e
+        dbMask = self._mgf(seed, k-hLen-1)
+        # Step 3f
+        db = strxor(maskedDB, dbMask)
+        # Step 3b + 3g
+        res = oaep_decode(em, lHash, db)
+        if res <= 0:
+            raise ValueError("Incorrect decryption.")
+        # Step 4
+        return db[res:]
+
+
+def new(key, hashAlgo=None, mgfunc=None, label=b'', randfunc=None):
+    """Return a cipher object :class:`PKCS1OAEP_Cipher`
+       that can be used to perform PKCS#1 OAEP encryption or decryption.
+
+    :param key:
+      The key object to use to encrypt or decrypt the message.
+      Decryption is only possible with a private RSA key.
+    :type key: RSA key object
+
+    :param hashAlgo:
+      The hash function to use. This can be a module under `Crypto.Hash`
+      or an existing hash object created from any of such modules.
+      If not specified, `Crypto.Hash.SHA1` is used.
+    :type hashAlgo: hash object
+
+    :param mgfunc:
+      A mask generation function that accepts two parameters: a string to
+      use as seed, and the lenth of the mask to generate, in bytes.
+      If not specified, the standard MGF1 consistent with ``hashAlgo`` is used (a safe choice).
+    :type mgfunc: callable
+
+    :param label:
+      A label to apply to this particular encryption. If not specified,
+      an empty string is used. Specifying a label does not improve
+      security.
+    :type label: bytes/bytearray/memoryview
+
+    :param randfunc:
+      A function that returns random bytes.
+      The default is `Random.get_random_bytes`.
+    :type randfunc: callable
+    """
+
+    if randfunc is None:
+        randfunc = Random.get_random_bytes
+    return PKCS1OAEP_Cipher(key, hashAlgo, mgfunc, label, randfunc)

Lib/site-packages/Crypto/Cipher/PKCS1_OAEP.pyi

+from typing import Optional, Union, Callable, Any, overload
+from typing_extensions import Protocol
+
+from Crypto.PublicKey.RSA import RsaKey
+
+class HashLikeClass(Protocol):
+    digest_size : int
+    def new(self, data: Optional[bytes] = ...) -> Any: ...
+
+class HashLikeModule(Protocol):
+    digest_size : int
+    @staticmethod
+    def new(data: Optional[bytes] = ...) -> Any: ...
+
+HashLike = Union[HashLikeClass, HashLikeModule]
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+class PKCS1OAEP_Cipher:
+    def __init__(self,
+                 key: RsaKey,
+                 hashAlgo: HashLike,
+                 mgfunc: Callable[[bytes, int], bytes],
+                 label: Buffer,
+                 randfunc: Callable[[int], bytes]) -> None: ...
+    def can_encrypt(self) -> bool: ...
+    def can_decrypt(self) -> bool: ...
+    def encrypt(self, message: Buffer) -> bytes: ...
+    def decrypt(self, ciphertext: Buffer) -> bytes: ...
+
+def new(key: RsaKey,
+        hashAlgo: Optional[HashLike] = ...,
+        mgfunc: Optional[Callable[[bytes, int], bytes]] = ...,
+        label: Optional[Buffer] = ...,
+        randfunc: Optional[Callable[[int], bytes]] = ...) -> PKCS1OAEP_Cipher: ...

Lib/site-packages/Crypto/Cipher/PKCS1_v1_5.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/PKCS1-v1_5.py : PKCS#1 v1.5
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+__all__ = ['new', 'PKCS115_Cipher']
+
+from Crypto import Random
+from Crypto.Util.number import bytes_to_long, long_to_bytes
+from Crypto.Util.py3compat import bord, is_bytes, _copy_bytes
+from ._pkcs1_oaep_decode import pkcs1_decode
+
+
+class PKCS115_Cipher:
+    """This cipher can perform PKCS#1 v1.5 RSA encryption or decryption.
+    Do not instantiate directly. Use :func:`Crypto.Cipher.PKCS1_v1_5.new` instead."""
+
+    def __init__(self, key, randfunc):
+        """Initialize this PKCS#1 v1.5 cipher object.
+
+        :Parameters:
+         key : an RSA key object
+          If a private half is given, both encryption and decryption are possible.
+          If a public half is given, only encryption is possible.
+         randfunc : callable
+          Function that returns random bytes.
+        """
+
+        self._key = key
+        self._randfunc = randfunc
+
+    def can_encrypt(self):
+        """Return True if this cipher object can be used for encryption."""
+        return self._key.can_encrypt()
+
+    def can_decrypt(self):
+        """Return True if this cipher object can be used for decryption."""
+        return self._key.can_decrypt()
+
+    def encrypt(self, message):
+        """Produce the PKCS#1 v1.5 encryption of a message.
+
+        This function is named ``RSAES-PKCS1-V1_5-ENCRYPT``, and it is specified in
+        `section 7.2.1 of RFC8017
+        <https://tools.ietf.org/html/rfc8017#page-28>`_.
+
+        :param message:
+            The message to encrypt, also known as plaintext. It can be of
+            variable length, but not longer than the RSA modulus (in bytes) minus 11.
+        :type message: bytes/bytearray/memoryview
+
+        :Returns: A byte string, the ciphertext in which the message is encrypted.
+            It is as long as the RSA modulus (in bytes).
+
+        :Raises ValueError:
+            If the RSA key length is not sufficiently long to deal with the given
+            message.
+        """
+
+        # See 7.2.1 in RFC8017
+        k = self._key.size_in_bytes()
+        mLen = len(message)
+
+        # Step 1
+        if mLen > k - 11:
+            raise ValueError("Plaintext is too long.")
+        # Step 2a
+        ps = []
+        while len(ps) != k - mLen - 3:
+            new_byte = self._randfunc(1)
+            if bord(new_byte[0]) == 0x00:
+                continue
+            ps.append(new_byte)
+        ps = b"".join(ps)
+        # Step 2b
+        em = b'\x00\x02' + ps + b'\x00' + _copy_bytes(None, None, message)
+        # Step 3a (OS2IP)
+        em_int = bytes_to_long(em)
+        # Step 3b (RSAEP)
+        m_int = self._key._encrypt(em_int)
+        # Step 3c (I2OSP)
+        c = long_to_bytes(m_int, k)
+        return c
+
+    def decrypt(self, ciphertext, sentinel, expected_pt_len=0):
+        r"""Decrypt a PKCS#1 v1.5 ciphertext.
+
+        This is the function ``RSAES-PKCS1-V1_5-DECRYPT`` specified in
+        `section 7.2.2 of RFC8017
+        <https://tools.ietf.org/html/rfc8017#page-29>`_.
+
+        Args:
+          ciphertext (bytes/bytearray/memoryview):
+            The ciphertext that contains the message to recover.
+          sentinel (any type):
+            The object to return whenever an error is detected.
+          expected_pt_len (integer):
+            The length the plaintext is known to have, or 0 if unknown.
+
+        Returns (byte string):
+            It is either the original message or the ``sentinel`` (in case of an error).
+
+        .. warning::
+            PKCS#1 v1.5 decryption is intrinsically vulnerable to timing
+            attacks (see `Bleichenbacher's`__ attack).
+            **Use PKCS#1 OAEP instead**.
+
+            This implementation attempts to mitigate the risk
+            with some constant-time constructs.
+            However, they are not sufficient by themselves: the type of protocol you
+            implement and the way you handle errors make a big difference.
+
+            Specifically, you should make it very hard for the (malicious)
+            party that submitted the ciphertext to quickly understand if decryption
+            succeeded or not.
+
+            To this end, it is recommended that your protocol only encrypts
+            plaintexts of fixed length (``expected_pt_len``),
+            that ``sentinel`` is a random byte string of the same length,
+            and that processing continues for as long
+            as possible even if ``sentinel`` is returned (i.e. in case of
+            incorrect decryption).
+
+            .. __: https://dx.doi.org/10.1007/BFb0055716
+        """
+
+        # See 7.2.2 in RFC8017
+        k = self._key.size_in_bytes()
+
+        # Step 1
+        if len(ciphertext) != k:
+            raise ValueError("Ciphertext with incorrect length (not %d bytes)" % k)
+
+        # Step 2a (O2SIP)
+        ct_int = bytes_to_long(ciphertext)
+
+        # Step 2b (RSADP) and Step 2c (I2OSP)
+        em = self._key._decrypt_to_bytes(ct_int)
+
+        # Step 3 (not constant time when the sentinel is not a byte string)
+        output = bytes(bytearray(k))
+        if not is_bytes(sentinel) or len(sentinel) > k:
+            size = pkcs1_decode(em, b'', expected_pt_len, output)
+            if size < 0:
+                return sentinel
+            else:
+                return output[size:]
+
+        # Step 3 (somewhat constant time)
+        size = pkcs1_decode(em, sentinel, expected_pt_len, output)
+        return output[size:]
+
+
+def new(key, randfunc=None):
+    """Create a cipher for performing PKCS#1 v1.5 encryption or decryption.
+
+    :param key:
+      The key to use to encrypt or decrypt the message. This is a `Crypto.PublicKey.RSA` object.
+      Decryption is only possible if *key* is a private RSA key.
+    :type key: RSA key object
+
+    :param randfunc:
+      Function that return random bytes.
+      The default is :func:`Crypto.Random.get_random_bytes`.
+    :type randfunc: callable
+
+    :returns: A cipher object `PKCS115_Cipher`.
+    """
+
+    if randfunc is None:
+        randfunc = Random.get_random_bytes
+    return PKCS115_Cipher(key, randfunc)

Lib/site-packages/Crypto/Cipher/PKCS1_v1_5.pyi

+from typing import Callable, Union, Any, Optional, TypeVar
+
+from Crypto.PublicKey.RSA import RsaKey
+
+Buffer = Union[bytes, bytearray, memoryview]
+T = TypeVar('T')
+
+class PKCS115_Cipher:
+    def __init__(self,
+                 key: RsaKey,
+                 randfunc: Callable[[int], bytes]) -> None: ...
+    def can_encrypt(self) -> bool: ...
+    def can_decrypt(self) -> bool: ...
+    def encrypt(self, message: Buffer) -> bytes: ...
+    def decrypt(self, ciphertext: Buffer,
+                sentinel: T,
+                expected_pt_len: Optional[int] = ...) -> Union[bytes, T]: ...
+
+def new(key: RsaKey,
+        randfunc: Optional[Callable[[int], bytes]] = ...) -> PKCS115_Cipher: ...

Lib/site-packages/Crypto/Cipher/Salsa20.py

+# -*- coding: utf-8 -*-
+#
+# Cipher/Salsa20.py : Salsa20 stream cipher (http://cr.yp.to/snuffle.html)
+#
+# Contributed by Fabrizio Tarizzo <fabrizio@fabriziotarizzo.org>.
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+from Crypto.Util.py3compat import _copy_bytes
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  create_string_buffer,
+                                  get_raw_buffer, VoidPointer,
+                                  SmartPointer, c_size_t,
+                                  c_uint8_ptr, is_writeable_buffer)
+
+from Crypto.Random import get_random_bytes
+
+_raw_salsa20_lib = load_pycryptodome_raw_lib("Crypto.Cipher._Salsa20",
+                    """
+                    int Salsa20_stream_init(uint8_t *key, size_t keylen,
+                                            uint8_t *nonce, size_t nonce_len,
+                                            void **pSalsaState);
+                    int Salsa20_stream_destroy(void *salsaState);
+                    int Salsa20_stream_encrypt(void *salsaState,
+                                               const uint8_t in[],
+                                               uint8_t out[], size_t len);
+                    """)
+
+
+class Salsa20Cipher:
+    """Salsa20 cipher object. Do not create it directly. Use :py:func:`new`
+    instead.
+
+    :var nonce: The nonce with length 8
+    :vartype nonce: byte string
+    """
+
+    def __init__(self, key, nonce):
+        """Initialize a Salsa20 cipher object
+
+        See also `new()` at the module level."""
+
+        if len(key) not in key_size:
+            raise ValueError("Incorrect key length for Salsa20 (%d bytes)" % len(key))
+
+        if len(nonce) != 8:
+            raise ValueError("Incorrect nonce length for Salsa20 (%d bytes)" %
+                             len(nonce))
+
+        self.nonce = _copy_bytes(None, None, nonce)
+
+        self._state = VoidPointer()
+        result = _raw_salsa20_lib.Salsa20_stream_init(
+                        c_uint8_ptr(key),
+                        c_size_t(len(key)),
+                        c_uint8_ptr(nonce),
+                        c_size_t(len(nonce)),
+                        self._state.address_of())
+        if result:
+            raise ValueError("Error %d instantiating a Salsa20 cipher")
+        self._state = SmartPointer(self._state.get(),
+                                   _raw_salsa20_lib.Salsa20_stream_destroy)
+
+        self.block_size = 1
+        self.key_size = len(key)
+
+    def encrypt(self, plaintext, output=None):
+        """Encrypt a piece of data.
+
+        Args:
+          plaintext(bytes/bytearray/memoryview): The data to encrypt, of any size.
+        Keyword Args:
+          output(bytes/bytearray/memoryview): The location where the ciphertext
+            is written to. If ``None``, the ciphertext is returned.
+        Returns:
+          If ``output`` is ``None``, the ciphertext is returned as ``bytes``.
+          Otherwise, ``None``.
+        """
+        
+        if output is None:
+            ciphertext = create_string_buffer(len(plaintext))
+        else:
+            ciphertext = output
+           
+            if not is_writeable_buffer(output):
+                raise TypeError("output must be a bytearray or a writeable memoryview")
+        
+            if len(plaintext) != len(output):
+                raise ValueError("output must have the same length as the input"
+                                 "  (%d bytes)" % len(plaintext))
+
+        result = _raw_salsa20_lib.Salsa20_stream_encrypt(
+                                         self._state.get(),
+                                         c_uint8_ptr(plaintext),
+                                         c_uint8_ptr(ciphertext),
+                                         c_size_t(len(plaintext)))
+        if result:
+            raise ValueError("Error %d while encrypting with Salsa20" % result)
+
+        if output is None:
+            return get_raw_buffer(ciphertext)
+        else:
+            return None
+
+    def decrypt(self, ciphertext, output=None):
+        """Decrypt a piece of data.
+        
+        Args:
+          ciphertext(bytes/bytearray/memoryview): The data to decrypt, of any size.
+        Keyword Args:
+          output(bytes/bytearray/memoryview): The location where the plaintext
+            is written to. If ``None``, the plaintext is returned.
+        Returns:
+          If ``output`` is ``None``, the plaintext is returned as ``bytes``.
+          Otherwise, ``None``.
+        """
+
+        try:
+            return self.encrypt(ciphertext, output=output)
+        except ValueError as e:
+            raise ValueError(str(e).replace("enc", "dec"))
+
+
+def new(key, nonce=None):
+    """Create a new Salsa20 cipher
+
+    :keyword key: The secret key to use. It must be 16 or 32 bytes long.
+    :type key: bytes/bytearray/memoryview
+
+    :keyword nonce:
+        A value that must never be reused for any other encryption
+        done with this key. It must be 8 bytes long.
+
+        If not provided, a random byte string will be generated (you can read
+        it back via the ``nonce`` attribute of the returned object).
+    :type nonce: bytes/bytearray/memoryview
+
+    :Return: a :class:`Crypto.Cipher.Salsa20.Salsa20Cipher` object
+    """
+
+    if nonce is None:
+        nonce = get_random_bytes(8)
+
+    return Salsa20Cipher(key, nonce)
+
+# Size of a data block (in bytes)
+block_size = 1
+
+# Size of a key (in bytes)
+key_size = (16, 32)
+

Lib/site-packages/Crypto/Cipher/Salsa20.pyi

+from typing import Union, Tuple, Optional, overload, Optional
+
+Buffer = bytes|bytearray|memoryview
+
+class Salsa20Cipher:
+    nonce: bytes
+    block_size: int
+    key_size: int
+
+    def __init__(self,
+                 key: Buffer,
+                 nonce: Buffer) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+
+def new(key: Buffer, nonce: Optional[Buffer] = ...) -> Salsa20Cipher: ...
+
+block_size: int
+key_size: Tuple[int, int]
+

Lib/site-packages/Crypto/Cipher/_EKSBlowfish.py

+# ===================================================================
+#
+# Copyright (c) 2019, Legrandin <helderijs@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+# ===================================================================
+
+import sys
+
+from Crypto.Cipher import _create_cipher
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer, c_size_t,
+                                  c_uint8_ptr, c_uint)
+
+_raw_blowfish_lib = load_pycryptodome_raw_lib(
+        "Crypto.Cipher._raw_eksblowfish",
+        """
+        int EKSBlowfish_start_operation(const uint8_t key[],
+                                        size_t key_len,
+                                        const uint8_t salt[16],
+                                        size_t salt_len,
+                                        unsigned cost,
+                                        unsigned invert,
+                                        void **pResult);
+        int EKSBlowfish_encrypt(const void *state,
+                                const uint8_t *in,
+                                uint8_t *out,
+                                size_t data_len);
+        int EKSBlowfish_decrypt(const void *state,
+                                const uint8_t *in,
+                                uint8_t *out,
+                                size_t data_len);
+        int EKSBlowfish_stop_operation(void *state);
+        """
+        )
+
+
+def _create_base_cipher(dict_parameters):
+    """This method instantiates and returns a smart pointer to
+    a low-level base cipher. It will absorb named parameters in
+    the process."""
+
+    try:
+        key = dict_parameters.pop("key")
+        salt = dict_parameters.pop("salt")
+        cost = dict_parameters.pop("cost")
+    except KeyError as e:
+        raise TypeError("Missing EKSBlowfish parameter: " + str(e))
+    invert = dict_parameters.pop("invert", True)
+
+    if len(key) not in key_size:
+        raise ValueError("Incorrect EKSBlowfish key length (%d bytes)" % len(key))
+
+    start_operation = _raw_blowfish_lib.EKSBlowfish_start_operation
+    stop_operation = _raw_blowfish_lib.EKSBlowfish_stop_operation
+
+    void_p = VoidPointer()
+    result = start_operation(c_uint8_ptr(key),
+                             c_size_t(len(key)),
+                             c_uint8_ptr(salt),
+                             c_size_t(len(salt)),
+                             c_uint(cost),
+                             c_uint(int(invert)),
+                             void_p.address_of())
+    if result:
+        raise ValueError("Error %X while instantiating the EKSBlowfish cipher"
+                         % result)
+    return SmartPointer(void_p.get(), stop_operation)
+
+
+def new(key, mode, salt, cost, invert):
+    """Create a new EKSBlowfish cipher
+    
+    Args:
+
+      key (bytes, bytearray, memoryview):
+        The secret key to use in the symmetric cipher.
+        Its length can vary from 0 to 72 bytes.
+
+      mode (one of the supported ``MODE_*`` constants):
+        The chaining mode to use for encryption or decryption.
+
+      salt (bytes, bytearray, memoryview):
+        The salt that bcrypt uses to thwart rainbow table attacks
+
+      cost (integer):
+        The complexity factor in bcrypt
+
+      invert (bool):
+        If ``False``, in the inner loop use ``ExpandKey`` first over the salt
+        and then over the key, as defined in
+        the `original bcrypt specification <https://www.usenix.org/legacy/events/usenix99/provos/provos_html/node4.html>`_.
+        If ``True``, reverse the order, as in the first implementation of
+        `bcrypt` in OpenBSD.
+
+    :Return: an EKSBlowfish object
+    """
+
+    kwargs = { 'salt':salt, 'cost':cost, 'invert':invert }
+    return _create_cipher(sys.modules[__name__], key, mode, **kwargs)
+
+
+MODE_ECB = 1
+
+# Size of a data block (in bytes)
+block_size = 8
+# Size of a key (in bytes)
+key_size = range(0, 72 + 1)

Lib/site-packages/Crypto/Cipher/_EKSBlowfish.pyi

+from typing import Union, Iterable
+
+from Crypto.Cipher._mode_ecb import EcbMode
+
+MODE_ECB: int
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+def new(key: Buffer,
+        mode: int,
+	salt: Buffer,
+	cost: int) -> EcbMode: ...
+
+block_size: int
+key_size: Iterable[int]

Lib/site-packages/Crypto/Cipher/__init__.py

+#
+# A block cipher is instantiated as a combination of:
+# 1. A base cipher (such as AES)
+# 2. A mode of operation (such as CBC)
+#
+# Both items are implemented as C modules.
+#
+# The API of #1 is (replace "AES" with the name of the actual cipher):
+# - AES_start_operaion(key) --> base_cipher_state
+# - AES_encrypt(base_cipher_state, in, out, length)
+# - AES_decrypt(base_cipher_state, in, out, length)
+# - AES_stop_operation(base_cipher_state)
+#
+# Where base_cipher_state is AES_State, a struct with BlockBase (set of
+# pointers to encrypt/decrypt/stop) followed by cipher-specific data.
+#
+# The API of #2 is (replace "CBC" with the name of the actual mode):
+# - CBC_start_operation(base_cipher_state) --> mode_state
+# - CBC_encrypt(mode_state, in, out, length)
+# - CBC_decrypt(mode_state, in, out, length)
+# - CBC_stop_operation(mode_state)
+#
+# where mode_state is a a pointer to base_cipher_state plus mode-specific data.
+
+import os
+
+from Crypto.Cipher._mode_ecb import _create_ecb_cipher
+from Crypto.Cipher._mode_cbc import _create_cbc_cipher
+from Crypto.Cipher._mode_cfb import _create_cfb_cipher
+from Crypto.Cipher._mode_ofb import _create_ofb_cipher
+from Crypto.Cipher._mode_ctr import _create_ctr_cipher
+from Crypto.Cipher._mode_openpgp import _create_openpgp_cipher
+from Crypto.Cipher._mode_ccm import _create_ccm_cipher
+from Crypto.Cipher._mode_eax import _create_eax_cipher
+from Crypto.Cipher._mode_siv import _create_siv_cipher
+from Crypto.Cipher._mode_gcm import _create_gcm_cipher
+from Crypto.Cipher._mode_ocb import _create_ocb_cipher
+
+_modes = { 1:_create_ecb_cipher,
+           2:_create_cbc_cipher,
+           3:_create_cfb_cipher,
+           5:_create_ofb_cipher,
+           6:_create_ctr_cipher,
+           7:_create_openpgp_cipher,
+           9:_create_eax_cipher
+           }
+
+_extra_modes = { 8:_create_ccm_cipher,
+                10:_create_siv_cipher,
+                11:_create_gcm_cipher,
+                12:_create_ocb_cipher
+                }
+
+def _create_cipher(factory, key, mode, *args, **kwargs):
+
+    kwargs["key"] = key
+
+    modes = dict(_modes)
+    if kwargs.pop("add_aes_modes", False):
+        modes.update(_extra_modes)
+    if not mode in modes:
+        raise ValueError("Mode not supported")
+
+    if args:
+        if mode in (8, 9, 10, 11, 12):
+            if len(args) > 1:
+                raise TypeError("Too many arguments for this mode")
+            kwargs["nonce"] = args[0]
+        elif mode in (2, 3, 5, 7):
+            if len(args) > 1:
+                raise TypeError("Too many arguments for this mode")
+            kwargs["IV"] = args[0]
+        elif mode == 6:
+            if len(args) > 0:
+                raise TypeError("Too many arguments for this mode")
+        elif mode == 1:
+            raise TypeError("IV is not meaningful for the ECB mode")
+
+    return modes[mode](factory, **kwargs)

Lib/site-packages/Crypto/Cipher/_mode_cbc.pyi

+from typing import Union, overload
+
+from Crypto.Util._raw_api import SmartPointer
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['CbcMode']
+
+class CbcMode(object):
+    block_size: int
+    iv: Buffer
+    IV: Buffer
+
+    def __init__(self,
+                 block_cipher: SmartPointer,
+                 iv: Buffer) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+

Lib/site-packages/Crypto/Cipher/_mode_ccm.pyi

+from types import ModuleType
+from typing import Union, overload, Dict, Tuple, Optional
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['CcmMode']
+
+class CcmMode(object):
+    block_size: int
+    nonce: bytes
+
+    def __init__(self,
+                 factory: ModuleType,
+                 key: Buffer,
+                 nonce: Buffer,
+                 mac_len: int,
+                 msg_len: int,
+                 assoc_len: int,
+                 cipher_params: Dict) -> None: ...
+    
+    def update(self, assoc_data: Buffer) -> CcmMode: ...
+
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, received_mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer) -> Tuple[bytes, bytes]: ...
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer,
+                           output: Buffer) -> Tuple[None, bytes]: ...
+    def decrypt_and_verify(self,
+                           ciphertext: Buffer,
+                           received_mac_tag: Buffer,
+                           output: Optional[Union[bytearray, memoryview]] = ...) -> bytes: ...

Lib/site-packages/Crypto/Cipher/_mode_cfb.pyi

+from typing import Union, overload
+
+from Crypto.Util._raw_api import SmartPointer
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['CfbMode']
+
+
+class CfbMode(object):
+    block_size: int
+    iv: Buffer
+    IV: Buffer
+    
+    def __init__(self,
+                 block_cipher: SmartPointer,
+                 iv: Buffer,
+                 segment_size: int) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...

Lib/site-packages/Crypto/Cipher/_mode_ctr.pyi

+from typing import Union, overload
+
+from Crypto.Util._raw_api import SmartPointer
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['CtrMode']
+
+class CtrMode(object):
+    block_size: int
+    nonce: bytes
+
+    def __init__(self,
+                 block_cipher: SmartPointer,
+                 initial_counter_block: Buffer,
+                 prefix_len: int,
+                 counter_len: int,
+                 little_endian: bool) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+

Lib/site-packages/Crypto/Cipher/_mode_eax.pyi

+from types import ModuleType
+from typing import Any, Union, Tuple, Dict, overload, Optional
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['EaxMode']
+
+class EaxMode(object):
+    block_size: int
+    nonce: bytes
+    
+    def __init__(self,
+                 factory: ModuleType,
+                 key: Buffer,
+                 nonce: Buffer,
+                 mac_len: int,
+                 cipher_params: Dict) -> None: ...
+    
+    def update(self, assoc_data: Buffer) -> EaxMode: ...
+
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, received_mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer) -> Tuple[bytes, bytes]: ...
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer,
+                           output: Buffer) -> Tuple[None, bytes]: ...
+    def decrypt_and_verify(self,
+                           ciphertext: Buffer,
+                           received_mac_tag: Buffer,
+                           output: Optional[Union[bytearray, memoryview]] = ...) -> bytes: ...

Lib/site-packages/Crypto/Cipher/_mode_ecb.py

+# -*- coding: utf-8 -*-
+#
+#  Cipher/mode_ecb.py : ECB mode
+#
+# ===================================================================
+# The contents of this file are dedicated to the public domain.  To
+# the extent that dedication to the public domain is not available,
+# everyone is granted a worldwide, perpetual, royalty-free,
+# non-exclusive license to exercise all rights associated with the
+# contents of this file for any purpose whatsoever.
+# No rights are reserved.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+# ===================================================================
+
+"""
+Electronic Code Book (ECB) mode.
+"""
+
+__all__ = [ 'EcbMode' ]
+
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, create_string_buffer,
+                                  get_raw_buffer, SmartPointer,
+                                  c_size_t, c_uint8_ptr,
+                                  is_writeable_buffer)
+
+raw_ecb_lib = load_pycryptodome_raw_lib("Crypto.Cipher._raw_ecb", """
+                    int ECB_start_operation(void *cipher,
+                                            void **pResult);
+                    int ECB_encrypt(void *ecbState,
+                                    const uint8_t *in,
+                                    uint8_t *out,
+                                    size_t data_len);
+                    int ECB_decrypt(void *ecbState,
+                                    const uint8_t *in,
+                                    uint8_t *out,
+                                    size_t data_len);
+                    int ECB_stop_operation(void *state);
+                    """
+                                        )
+
+
+class EcbMode(object):
+    """*Electronic Code Book (ECB)*.
+
+    This is the simplest encryption mode. Each of the plaintext blocks
+    is directly encrypted into a ciphertext block, independently of
+    any other block.
+
+    This mode is dangerous because it exposes frequency of symbols
+    in your plaintext. Other modes (e.g. *CBC*) should be used instead.
+
+    See `NIST SP800-38A`_ , Section 6.1.
+
+    .. _`NIST SP800-38A` : http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
+
+    :undocumented: __init__
+    """
+
+    def __init__(self, block_cipher):
+        """Create a new block cipher, configured in ECB mode.
+
+        :Parameters:
+          block_cipher : C pointer
+            A smart pointer to the low-level block cipher instance.
+        """
+        self.block_size = block_cipher.block_size
+
+        self._state = VoidPointer()
+        result = raw_ecb_lib.ECB_start_operation(block_cipher.get(),
+                                                 self._state.address_of())
+        if result:
+            raise ValueError("Error %d while instantiating the ECB mode"
+                             % result)
+
+        # Ensure that object disposal of this Python object will (eventually)
+        # free the memory allocated by the raw library for the cipher
+        # mode
+        self._state = SmartPointer(self._state.get(),
+                                   raw_ecb_lib.ECB_stop_operation)
+
+        # Memory allocated for the underlying block cipher is now owned
+        # by the cipher mode
+        block_cipher.release()
+
+    def encrypt(self, plaintext, output=None):
+        """Encrypt data with the key set at initialization.
+
+        The data to encrypt can be broken up in two or
+        more pieces and `encrypt` can be called multiple times.
+
+        That is, the statement:
+
+            >>> c.encrypt(a) + c.encrypt(b)
+
+        is equivalent to:
+
+             >>> c.encrypt(a+b)
+
+        This function does not add any padding to the plaintext.
+
+        :Parameters:
+          plaintext : bytes/bytearray/memoryview
+            The piece of data to encrypt.
+            The length must be multiple of the cipher block length.
+        :Keywords:
+          output : bytearray/memoryview
+            The location where the ciphertext must be written to.
+            If ``None``, the ciphertext is returned.
+        :Return:
+          If ``output`` is ``None``, the ciphertext is returned as ``bytes``.
+          Otherwise, ``None``.
+        """
+
+        if output is None:
+            ciphertext = create_string_buffer(len(plaintext))
+        else:
+            ciphertext = output
+            
+            if not is_writeable_buffer(output):
+                raise TypeError("output must be a bytearray or a writeable memoryview")
+        
+            if len(plaintext) != len(output):
+                raise ValueError("output must have the same length as the input"
+                                 "  (%d bytes)" % len(plaintext))
+
+        result = raw_ecb_lib.ECB_encrypt(self._state.get(),
+                                         c_uint8_ptr(plaintext),
+                                         c_uint8_ptr(ciphertext),
+                                         c_size_t(len(plaintext)))
+        if result:
+            if result == 3:
+                raise ValueError("Data must be aligned to block boundary in ECB mode")
+            raise ValueError("Error %d while encrypting in ECB mode" % result)
+        
+        if output is None:
+            return get_raw_buffer(ciphertext)
+        else:
+            return None
+
+    def decrypt(self, ciphertext, output=None):
+        """Decrypt data with the key set at initialization.
+
+        The data to decrypt can be broken up in two or
+        more pieces and `decrypt` can be called multiple times.
+
+        That is, the statement:
+
+            >>> c.decrypt(a) + c.decrypt(b)
+
+        is equivalent to:
+
+             >>> c.decrypt(a+b)
+
+        This function does not remove any padding from the plaintext.
+
+        :Parameters:
+          ciphertext : bytes/bytearray/memoryview
+            The piece of data to decrypt.
+            The length must be multiple of the cipher block length.
+        :Keywords:
+          output : bytearray/memoryview
+            The location where the plaintext must be written to.
+            If ``None``, the plaintext is returned.
+        :Return:
+          If ``output`` is ``None``, the plaintext is returned as ``bytes``.
+          Otherwise, ``None``.
+        """
+        
+        if output is None:
+            plaintext = create_string_buffer(len(ciphertext))
+        else:
+            plaintext = output
+
+            if not is_writeable_buffer(output):
+                raise TypeError("output must be a bytearray or a writeable memoryview")
+            
+            if len(ciphertext) != len(output):
+                raise ValueError("output must have the same length as the input"
+                                 "  (%d bytes)" % len(plaintext))
+
+        result = raw_ecb_lib.ECB_decrypt(self._state.get(),
+                                         c_uint8_ptr(ciphertext),
+                                         c_uint8_ptr(plaintext),
+                                         c_size_t(len(ciphertext)))
+        if result:
+            if result == 3:
+                raise ValueError("Data must be aligned to block boundary in ECB mode")
+            raise ValueError("Error %d while decrypting in ECB mode" % result)
+
+        if output is None:
+            return get_raw_buffer(plaintext)
+        else:
+            return None
+
+
+def _create_ecb_cipher(factory, **kwargs):
+    """Instantiate a cipher object that performs ECB encryption/decryption.
+
+    :Parameters:
+      factory : module
+        The underlying block cipher, a module from ``Crypto.Cipher``.
+
+    All keywords are passed to the underlying block cipher.
+    See the relevant documentation for details (at least ``key`` will need
+    to be present"""
+
+    cipher_state = factory._create_base_cipher(kwargs)
+    cipher_state.block_size = factory.block_size
+    if kwargs:
+        raise TypeError("Unknown parameters for ECB: %s" % str(kwargs))
+    return EcbMode(cipher_state)

Lib/site-packages/Crypto/Cipher/_mode_ecb.pyi

+from typing import Union, overload
+
+from Crypto.Util._raw_api import SmartPointer
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = [ 'EcbMode' ]
+
+class EcbMode(object):
+    def __init__(self, block_cipher: SmartPointer) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+

Lib/site-packages/Crypto/Cipher/_mode_gcm.pyi

+from types import ModuleType
+from typing import Union, Tuple, Dict, overload, Optional
+
+__all__ = ['GcmMode']
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+class GcmMode(object):
+    block_size: int
+    nonce: Buffer
+    
+    def __init__(self,
+                 factory: ModuleType,
+                 key: Buffer,
+                 nonce: Buffer,
+                 mac_len: int,
+                 cipher_params: Dict) -> None: ...
+    
+    def update(self, assoc_data: Buffer) -> GcmMode: ...
+
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, received_mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer) -> Tuple[bytes, bytes]: ...
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer,
+                           output: Buffer) -> Tuple[None, bytes]: ...
+    def decrypt_and_verify(self,
+                           ciphertext: Buffer,
+                           received_mac_tag: Buffer,
+                           output: Optional[Union[bytearray, memoryview]] = ...) -> bytes: ...

Lib/site-packages/Crypto/Cipher/_mode_ocb.pyi

+from types import ModuleType
+from typing import Union, Any, Optional, Tuple, Dict, overload
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+class OcbMode(object):
+    block_size: int
+    nonce: Buffer
+
+    def __init__(self,
+                 factory: ModuleType,
+                 nonce: Buffer,
+                 mac_len: int,
+                 cipher_params: Dict) -> None: ...
+    
+    def update(self, assoc_data: Buffer) -> OcbMode: ...
+
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, received_mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+
+    def encrypt_and_digest(self,
+                           plaintext: Buffer) -> Tuple[bytes, bytes]: ...
+    def decrypt_and_verify(self,
+                           ciphertext: Buffer,
+                           received_mac_tag: Buffer) -> bytes: ...

Lib/site-packages/Crypto/Cipher/_mode_ofb.pyi

+from typing import Union, overload
+
+from Crypto.Util._raw_api import SmartPointer
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['OfbMode']
+
+class OfbMode(object):
+    block_size: int
+    iv: Buffer
+    IV: Buffer
+    
+    def __init__(self,
+                 block_cipher: SmartPointer,
+                 iv: Buffer) -> None: ...
+    @overload
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def encrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+    @overload
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+    @overload
+    def decrypt(self, plaintext: Buffer, output: Union[bytearray, memoryview]) -> None: ...
+

Lib/site-packages/Crypto/Cipher/_mode_openpgp.py

+# ===================================================================
+#
+# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+# ===================================================================
+
+"""
+OpenPGP mode.
+"""
+
+__all__ = ['OpenPgpMode']
+
+from Crypto.Util.py3compat import _copy_bytes
+from Crypto.Random import get_random_bytes
+
+class OpenPgpMode(object):
+    """OpenPGP mode.
+
+    This mode is a variant of CFB, and it is only used in PGP and
+    OpenPGP_ applications. If in doubt, use another mode.
+
+    An Initialization Vector (*IV*) is required.
+
+    Unlike CFB, the *encrypted* IV (not the IV itself) is
+    transmitted to the receiver.
+
+    The IV is a random data block. For legacy reasons, two of its bytes are
+    duplicated to act as a checksum for the correctness of the key, which is now
+    known to be insecure and is ignored. The encrypted IV is therefore 2 bytes
+    longer than the clean IV.
+
+    .. _OpenPGP: http://tools.ietf.org/html/rfc4880
+
+    :undocumented: __init__
+    """
+
+    def __init__(self, factory, key, iv, cipher_params):
+
+        #: The block size of the underlying cipher, in bytes.
+        self.block_size = factory.block_size
+
+        self._done_first_block = False  # True after the first encryption
+
+        # Instantiate a temporary cipher to process the IV
+        IV_cipher = factory.new(
+                        key,
+                        factory.MODE_CFB,
+                        IV=b'\x00' * self.block_size,
+                        segment_size=self.block_size * 8,
+                        **cipher_params)
+
+        iv = _copy_bytes(None, None, iv)
+
+        # The cipher will be used for...
+        if len(iv) == self.block_size:
+            # ... encryption
+            self._encrypted_IV = IV_cipher.encrypt(iv + iv[-2:])
+        elif len(iv) == self.block_size + 2:
+            # ... decryption
+            self._encrypted_IV = iv
+            # Last two bytes are for a deprecated "quick check" feature that
+            # should not be used. (https://eprint.iacr.org/2005/033)
+            iv = IV_cipher.decrypt(iv)[:-2]
+        else:
+            raise ValueError("Length of IV must be %d or %d bytes"
+                             " for MODE_OPENPGP"
+                             % (self.block_size, self.block_size + 2))
+
+        self.iv = self.IV = iv
+
+        # Instantiate the cipher for the real PGP data
+        self._cipher = factory.new(
+                            key,
+                            factory.MODE_CFB,
+                            IV=self._encrypted_IV[-self.block_size:],
+                            segment_size=self.block_size * 8,
+                            **cipher_params)
+
+    def encrypt(self, plaintext):
+        """Encrypt data with the key and the parameters set at initialization.
+
+        A cipher object is stateful: once you have encrypted a message
+        you cannot encrypt (or decrypt) another message using the same
+        object.
+
+        The data to encrypt can be broken up in two or
+        more pieces and `encrypt` can be called multiple times.
+
+        That is, the statement:
+
+            >>> c.encrypt(a) + c.encrypt(b)
+
+        is equivalent to:
+
+             >>> c.encrypt(a+b)
+
+        This function does not add any padding to the plaintext.
+
+        :Parameters:
+          plaintext : bytes/bytearray/memoryview
+            The piece of data to encrypt.
+
+        :Return:
+            the encrypted data, as a byte string.
+            It is as long as *plaintext* with one exception:
+            when encrypting the first message chunk,
+            the encypted IV is prepended to the returned ciphertext.
+        """
+
+        res = self._cipher.encrypt(plaintext)
+        if not self._done_first_block:
+            res = self._encrypted_IV + res
+            self._done_first_block = True
+        return res
+
+    def decrypt(self, ciphertext):
+        """Decrypt data with the key and the parameters set at initialization.
+
+        A cipher object is stateful: once you have decrypted a message
+        you cannot decrypt (or encrypt) another message with the same
+        object.
+
+        The data to decrypt can be broken up in two or
+        more pieces and `decrypt` can be called multiple times.
+
+        That is, the statement:
+
+            >>> c.decrypt(a) + c.decrypt(b)
+
+        is equivalent to:
+
+             >>> c.decrypt(a+b)
+
+        This function does not remove any padding from the plaintext.
+
+        :Parameters:
+          ciphertext : bytes/bytearray/memoryview
+            The piece of data to decrypt.
+
+        :Return: the decrypted data (byte string).
+        """
+
+        return self._cipher.decrypt(ciphertext)
+
+
+def _create_openpgp_cipher(factory, **kwargs):
+    """Create a new block cipher, configured in OpenPGP mode.
+
+    :Parameters:
+      factory : module
+        The module.
+
+    :Keywords:
+      key : bytes/bytearray/memoryview
+        The secret key to use in the symmetric cipher.
+
+      IV : bytes/bytearray/memoryview
+        The initialization vector to use for encryption or decryption.
+
+        For encryption, the IV must be as long as the cipher block size.
+
+        For decryption, it must be 2 bytes longer (it is actually the
+        *encrypted* IV which was prefixed to the ciphertext).
+    """
+
+    iv = kwargs.pop("IV", None)
+    IV = kwargs.pop("iv", None)
+
+    if (None, None) == (iv, IV):
+        iv = get_random_bytes(factory.block_size)
+    if iv is not None:
+        if IV is not None:
+            raise TypeError("You must either use 'iv' or 'IV', not both")
+    else:
+        iv = IV
+
+    try:
+        key = kwargs.pop("key")
+    except KeyError as e:
+        raise TypeError("Missing component: " + str(e))
+
+    return OpenPgpMode(factory, key, iv, kwargs)

Lib/site-packages/Crypto/Cipher/_mode_openpgp.pyi

+from types import ModuleType
+from typing import Union, Dict
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['OpenPgpMode']
+
+class OpenPgpMode(object):
+    block_size: int
+    iv: Union[bytes, bytearray, memoryview]
+    IV: Union[bytes, bytearray, memoryview]
+    
+    def __init__(self,
+                 factory: ModuleType,
+                 key: Buffer,
+                 iv: Buffer,
+                 cipher_params: Dict) -> None: ...
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+

Lib/site-packages/Crypto/Cipher/_mode_siv.pyi

+from types import ModuleType
+from typing import Union, Tuple, Dict, Optional, overload
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+__all__ = ['SivMode']
+
+class SivMode(object):
+    block_size: int
+    nonce: bytes
+    
+    def __init__(self,
+                 factory: ModuleType,
+                 key: Buffer,
+                 nonce: Buffer,
+                 kwargs: Dict) -> None: ...
+    
+    def update(self, component: Buffer) -> SivMode: ...
+
+    def encrypt(self, plaintext: Buffer) -> bytes: ...
+    def decrypt(self, plaintext: Buffer) -> bytes: ...
+
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, received_mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer) -> Tuple[bytes, bytes]: ...
+    @overload
+    def encrypt_and_digest(self,
+                           plaintext: Buffer,
+                           output: Buffer) -> Tuple[None, bytes]: ...
+    def decrypt_and_verify(self,
+                           ciphertext: Buffer,
+                           received_mac_tag: Buffer,
+                           output: Optional[Union[bytearray, memoryview]] = ...) -> bytes: ...

Lib/site-packages/Crypto/Cipher/_pkcs1_oaep_decode.py

+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib, c_size_t,
+                                  c_uint8_ptr)
+
+
+_raw_pkcs1_decode = load_pycryptodome_raw_lib("Crypto.Cipher._pkcs1_decode",
+                        """
+                        int pkcs1_decode(const uint8_t *em, size_t len_em,
+                                         const uint8_t *sentinel, size_t len_sentinel,
+                                         size_t expected_pt_len,
+                                         uint8_t *output);
+
+                        int oaep_decode(const uint8_t *em,
+                                        size_t em_len,
+                                        const uint8_t *lHash,
+                                        size_t hLen,
+                                        const uint8_t *db,
+                                        size_t db_len);
+                        """)
+
+
+def pkcs1_decode(em, sentinel, expected_pt_len, output):
+    if len(em) != len(output):
+        raise ValueError("Incorrect output length")
+
+    ret = _raw_pkcs1_decode.pkcs1_decode(c_uint8_ptr(em),
+                                         c_size_t(len(em)),
+                                         c_uint8_ptr(sentinel),
+                                         c_size_t(len(sentinel)),
+                                         c_size_t(expected_pt_len),
+                                         c_uint8_ptr(output))
+    return ret
+
+
+def oaep_decode(em, lHash, db):
+    ret = _raw_pkcs1_decode.oaep_decode(c_uint8_ptr(em),
+                                        c_size_t(len(em)),
+                                        c_uint8_ptr(lHash),
+                                        c_size_t(len(lHash)),
+                                        c_uint8_ptr(db),
+                                        c_size_t(len(db)))
+    return ret

Lib/site-packages/Crypto/Hash/BLAKE2b.py

+# ===================================================================
+#
+# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+# ===================================================================
+
+from binascii import unhexlify
+
+from Crypto.Util.py3compat import bord, tobytes
+
+from Crypto.Random import get_random_bytes
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  create_string_buffer,
+                                  get_raw_buffer, c_size_t,
+                                  c_uint8_ptr)
+
+_raw_blake2b_lib = load_pycryptodome_raw_lib("Crypto.Hash._BLAKE2b",
+                        """
+                        int blake2b_init(void **state,
+                                         const uint8_t *key,
+                                         size_t key_size,
+                                         size_t digest_size);
+                        int blake2b_destroy(void *state);
+                        int blake2b_update(void *state,
+                                           const uint8_t *buf,
+                                           size_t len);
+                        int blake2b_digest(const void *state,
+                                           uint8_t digest[64]);
+                        int blake2b_copy(const void *src, void *dst);
+                        """)
+
+
+class BLAKE2b_Hash(object):
+    """A BLAKE2b hash object.
+    Do not instantiate directly. Use the :func:`new` function.
+
+    :ivar oid: ASN.1 Object ID
+    :vartype oid: string
+
+    :ivar block_size: the size in bytes of the internal message block,
+                      input to the compression function
+    :vartype block_size: integer
+
+    :ivar digest_size: the size in bytes of the resulting hash
+    :vartype digest_size: integer
+    """
+
+    # The internal block size of the hash algorithm in bytes.
+    block_size = 64
+
+    def __init__(self, data, key, digest_bytes, update_after_digest):
+
+        # The size of the resulting hash in bytes.
+        self.digest_size = digest_bytes
+
+        self._update_after_digest = update_after_digest
+        self._digest_done = False
+
+        # See https://tools.ietf.org/html/rfc7693
+        if digest_bytes in (20, 32, 48, 64) and not key:
+            self.oid = "1.3.6.1.4.1.1722.12.2.1." + str(digest_bytes)
+
+        state = VoidPointer()
+        result = _raw_blake2b_lib.blake2b_init(state.address_of(),
+                                               c_uint8_ptr(key),
+                                               c_size_t(len(key)),
+                                               c_size_t(digest_bytes)
+                                               )
+        if result:
+            raise ValueError("Error %d while instantiating BLAKE2b" % result)
+        self._state = SmartPointer(state.get(),
+                                   _raw_blake2b_lib.blake2b_destroy)
+        if data:
+            self.update(data)
+
+
+    def update(self, data):
+        """Continue hashing of a message by consuming the next chunk of data.
+
+        Args:
+            data (bytes/bytearray/memoryview): The next chunk of the message being hashed.
+        """
+
+        if self._digest_done and not self._update_after_digest:
+            raise TypeError("You can only call 'digest' or 'hexdigest' on this object")
+
+        result = _raw_blake2b_lib.blake2b_update(self._state.get(),
+                                                 c_uint8_ptr(data),
+                                                 c_size_t(len(data)))
+        if result:
+            raise ValueError("Error %d while hashing BLAKE2b data" % result)
+        return self
+
+
+    def digest(self):
+        """Return the **binary** (non-printable) digest of the message that has been hashed so far.
+
+        :return: The hash digest, computed over the data processed so far.
+                 Binary form.
+        :rtype: byte string
+        """
+
+        bfr = create_string_buffer(64)
+        result = _raw_blake2b_lib.blake2b_digest(self._state.get(),
+                                                 bfr)
+        if result:
+            raise ValueError("Error %d while creating BLAKE2b digest" % result)
+
+        self._digest_done = True
+
+        return get_raw_buffer(bfr)[:self.digest_size]
+
+
+    def hexdigest(self):
+        """Return the **printable** digest of the message that has been hashed so far.
+
+        :return: The hash digest, computed over the data processed so far.
+                 Hexadecimal encoded.
+        :rtype: string
+        """
+
+        return "".join(["%02x" % bord(x) for x in tuple(self.digest())])
+
+
+    def verify(self, mac_tag):
+        """Verify that a given **binary** MAC (computed by another party)
+        is valid.
+
+        Args:
+          mac_tag (bytes/bytearray/memoryview): the expected MAC of the message.
+
+        Raises:
+            ValueError: if the MAC does not match. It means that the message
+                has been tampered with or that the MAC key is incorrect.
+        """
+
+        secret = get_random_bytes(16)
+
+        mac1 = new(digest_bits=160, key=secret, data=mac_tag)
+        mac2 = new(digest_bits=160, key=secret, data=self.digest())
+
+        if mac1.digest() != mac2.digest():
+            raise ValueError("MAC check failed")
+
+
+    def hexverify(self, hex_mac_tag):
+        """Verify that a given **printable** MAC (computed by another party)
+        is valid.
+
+        Args:
+            hex_mac_tag (string): the expected MAC of the message, as a hexadecimal string.
+
+        Raises:
+            ValueError: if the MAC does not match. It means that the message
+                has been tampered with or that the MAC key is incorrect.
+        """
+
+        self.verify(unhexlify(tobytes(hex_mac_tag)))
+
+
+    def new(self, **kwargs):
+        """Return a new instance of a BLAKE2b hash object.
+        See :func:`new`.
+        """
+
+        if "digest_bytes" not in kwargs and "digest_bits" not in kwargs:
+            kwargs["digest_bytes"] = self.digest_size
+
+        return new(**kwargs)
+
+
+def new(**kwargs):
+    """Create a new hash object.
+
+    Args:
+        data (bytes/bytearray/memoryview):
+            Optional. The very first chunk of the message to hash.
+            It is equivalent to an early call to :meth:`BLAKE2b_Hash.update`.
+        digest_bytes (integer):
+            Optional. The size of the digest, in bytes (1 to 64). Default is 64.
+        digest_bits (integer):
+            Optional and alternative to ``digest_bytes``.
+            The size of the digest, in bits (8 to 512, in steps of 8).
+            Default is 512.
+        key (bytes/bytearray/memoryview):
+            Optional. The key to use to compute the MAC (1 to 64 bytes).
+            If not specified, no key will be used.
+        update_after_digest (boolean):
+            Optional. By default, a hash object cannot be updated anymore after
+            the digest is computed. When this flag is ``True``, such check
+            is no longer enforced.
+
+    Returns:
+        A :class:`BLAKE2b_Hash` hash object
+    """
+
+    data = kwargs.pop("data", None)
+    update_after_digest = kwargs.pop("update_after_digest", False)
+
+    digest_bytes = kwargs.pop("digest_bytes", None)
+    digest_bits = kwargs.pop("digest_bits", None)
+    if None not in (digest_bytes, digest_bits):
+        raise TypeError("Only one digest parameter must be provided")
+    if (None, None) == (digest_bytes, digest_bits):
+        digest_bytes = 64
+    if digest_bytes is not None:
+        if not (1 <= digest_bytes <= 64):
+            raise ValueError("'digest_bytes' not in range 1..64")
+    else:
+        if not (8 <= digest_bits <= 512) or (digest_bits % 8):
+            raise ValueError("'digest_bits' not in range 8..512, "
+                             "with steps of 8")
+        digest_bytes = digest_bits // 8
+
+    key = kwargs.pop("key", b"")
+    if len(key) > 64:
+        raise ValueError("BLAKE2b key cannot exceed 64 bytes")
+
+    if kwargs:
+        raise TypeError("Unknown parameters: " + str(kwargs))
+
+    return BLAKE2b_Hash(data, key, digest_bytes, update_after_digest)

Lib/site-packages/Crypto/Hash/BLAKE2b.pyi

+from typing import Any, Union
+from types import ModuleType
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+class BLAKE2b_Hash(object):
+    block_size: int
+    digest_size: int
+    oid: str
+
+    def __init__(self,
+                 data: Buffer,
+		 key: Buffer,
+		 digest_bytes: bytes,
+		 update_after_digest: bool) -> None: ...
+    def update(self, data: Buffer) -> BLAKE2b_Hash: ...
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+    def new(self,
+            data: Buffer = ...,
+	    digest_bytes: int = ...,
+	    digest_bits: int = ...,
+	    key: Buffer = ...,
+	    update_after_digest: bool = ...) -> BLAKE2b_Hash: ...
+
+def new(data: Buffer = ...,
+	digest_bytes: int = ...,
+	digest_bits: int = ...,
+	key: Buffer = ...,
+	update_after_digest: bool = ...) -> BLAKE2b_Hash: ...

Lib/site-packages/Crypto/Hash/BLAKE2s.py

+# ===================================================================
+#
+# Copyright (c) 2014, Legrandin <helderijs@gmail.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in
+#    the documentation and/or other materials provided with the
+#    distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+# ===================================================================
+
+from binascii import unhexlify
+
+from Crypto.Util.py3compat import bord, tobytes
+
+from Crypto.Random import get_random_bytes
+from Crypto.Util._raw_api import (load_pycryptodome_raw_lib,
+                                  VoidPointer, SmartPointer,
+                                  create_string_buffer,
+                                  get_raw_buffer, c_size_t,
+                                  c_uint8_ptr)
+
+_raw_blake2s_lib = load_pycryptodome_raw_lib("Crypto.Hash._BLAKE2s",
+                        """
+                        int blake2s_init(void **state,
+                                         const uint8_t *key,
+                                         size_t key_size,
+                                         size_t digest_size);
+                        int blake2s_destroy(void *state);
+                        int blake2s_update(void *state,
+                                           const uint8_t *buf,
+                                           size_t len);
+                        int blake2s_digest(const void *state,
+                                           uint8_t digest[32]);
+                        int blake2s_copy(const void *src, void *dst);
+                        """)
+
+
+class BLAKE2s_Hash(object):
+    """A BLAKE2s hash object.
+    Do not instantiate directly. Use the :func:`new` function.
+
+    :ivar oid: ASN.1 Object ID
+    :vartype oid: string
+
+    :ivar block_size: the size in bytes of the internal message block,
+                      input to the compression function
+    :vartype block_size: integer
+
+    :ivar digest_size: the size in bytes of the resulting hash
+    :vartype digest_size: integer
+    """
+
+    # The internal block size of the hash algorithm in bytes.
+    block_size = 32
+
+    def __init__(self, data, key, digest_bytes, update_after_digest):
+
+        # The size of the resulting hash in bytes.
+        self.digest_size = digest_bytes
+
+        self._update_after_digest = update_after_digest
+        self._digest_done = False
+
+        # See https://tools.ietf.org/html/rfc7693
+        if digest_bytes in (16, 20, 28, 32) and not key:
+            self.oid = "1.3.6.1.4.1.1722.12.2.2." + str(digest_bytes)
+
+        state = VoidPointer()
+        result = _raw_blake2s_lib.blake2s_init(state.address_of(),
+                                               c_uint8_ptr(key),
+                                               c_size_t(len(key)),
+                                               c_size_t(digest_bytes)
+                                               )
+        if result:
+            raise ValueError("Error %d while instantiating BLAKE2s" % result)
+        self._state = SmartPointer(state.get(),
+                                   _raw_blake2s_lib.blake2s_destroy)
+        if data:
+            self.update(data)
+
+
+    def update(self, data):
+        """Continue hashing of a message by consuming the next chunk of data.
+
+        Args:
+            data (byte string/byte array/memoryview): The next chunk of the message being hashed.
+        """
+
+        if self._digest_done and not self._update_after_digest:
+            raise TypeError("You can only call 'digest' or 'hexdigest' on this object")
+
+        result = _raw_blake2s_lib.blake2s_update(self._state.get(),
+                                                 c_uint8_ptr(data),
+                                                 c_size_t(len(data)))
+        if result:
+            raise ValueError("Error %d while hashing BLAKE2s data" % result)
+        return self
+
+
+    def digest(self):
+        """Return the **binary** (non-printable) digest of the message that has been hashed so far.
+
+        :return: The hash digest, computed over the data processed so far.
+                 Binary form.
+        :rtype: byte string
+        """
+
+        bfr = create_string_buffer(32)
+        result = _raw_blake2s_lib.blake2s_digest(self._state.get(),
+                                                 bfr)
+        if result:
+            raise ValueError("Error %d while creating BLAKE2s digest" % result)
+
+        self._digest_done = True
+
+        return get_raw_buffer(bfr)[:self.digest_size]
+
+
+    def hexdigest(self):
+        """Return the **printable** digest of the message that has been hashed so far.
+
+        :return: The hash digest, computed over the data processed so far.
+                 Hexadecimal encoded.
+        :rtype: string
+        """
+
+        return "".join(["%02x" % bord(x) for x in tuple(self.digest())])
+
+
+    def verify(self, mac_tag):
+        """Verify that a given **binary** MAC (computed by another party)
+        is valid.
+
+        Args:
+          mac_tag (byte string/byte array/memoryview): the expected MAC of the message.
+
+        Raises:
+            ValueError: if the MAC does not match. It means that the message
+                has been tampered with or that the MAC key is incorrect.
+        """
+
+        secret = get_random_bytes(16)
+
+        mac1 = new(digest_bits=160, key=secret, data=mac_tag)
+        mac2 = new(digest_bits=160, key=secret, data=self.digest())
+
+        if mac1.digest() != mac2.digest():
+            raise ValueError("MAC check failed")
+
+
+    def hexverify(self, hex_mac_tag):
+        """Verify that a given **printable** MAC (computed by another party)
+        is valid.
+
+        Args:
+            hex_mac_tag (string): the expected MAC of the message, as a hexadecimal string.
+
+        Raises:
+            ValueError: if the MAC does not match. It means that the message
+                has been tampered with or that the MAC key is incorrect.
+        """
+
+        self.verify(unhexlify(tobytes(hex_mac_tag)))
+
+
+    def new(self, **kwargs):
+        """Return a new instance of a BLAKE2s hash object.
+        See :func:`new`.
+        """
+
+        if "digest_bytes" not in kwargs and "digest_bits" not in kwargs:
+            kwargs["digest_bytes"] = self.digest_size
+
+        return new(**kwargs)
+
+
+def new(**kwargs):
+    """Create a new hash object.
+
+    Args:
+        data (byte string/byte array/memoryview):
+            Optional. The very first chunk of the message to hash.
+            It is equivalent to an early call to :meth:`BLAKE2s_Hash.update`.
+        digest_bytes (integer):
+            Optional. The size of the digest, in bytes (1 to 32). Default is 32.
+        digest_bits (integer):
+            Optional and alternative to ``digest_bytes``.
+            The size of the digest, in bits (8 to 256, in steps of 8).
+            Default is 256.
+        key (byte string):
+            Optional. The key to use to compute the MAC (1 to 64 bytes).
+            If not specified, no key will be used.
+        update_after_digest (boolean):
+            Optional. By default, a hash object cannot be updated anymore after
+            the digest is computed. When this flag is ``True``, such check
+            is no longer enforced.
+
+    Returns:
+        A :class:`BLAKE2s_Hash` hash object
+    """
+
+    data = kwargs.pop("data", None)
+    update_after_digest = kwargs.pop("update_after_digest", False)
+
+    digest_bytes = kwargs.pop("digest_bytes", None)
+    digest_bits = kwargs.pop("digest_bits", None)
+    if None not in (digest_bytes, digest_bits):
+        raise TypeError("Only one digest parameter must be provided")
+    if (None, None) == (digest_bytes, digest_bits):
+        digest_bytes = 32
+    if digest_bytes is not None:
+        if not (1 <= digest_bytes <= 32):
+            raise ValueError("'digest_bytes' not in range 1..32")
+    else:
+        if not (8 <= digest_bits <= 256) or (digest_bits % 8):
+            raise ValueError("'digest_bits' not in range 8..256, "
+                             "with steps of 8")
+        digest_bytes = digest_bits // 8
+
+    key = kwargs.pop("key", b"")
+    if len(key) > 32:
+        raise ValueError("BLAKE2s key cannot exceed 32 bytes")
+
+    if kwargs:
+        raise TypeError("Unknown parameters: " + str(kwargs))
+
+    return BLAKE2s_Hash(data, key, digest_bytes, update_after_digest)

Lib/site-packages/Crypto/Hash/BLAKE2s.pyi

+from typing import Any, Union
+
+Buffer = Union[bytes, bytearray, memoryview]
+
+class BLAKE2s_Hash(object):
+    block_size: int
+    digest_size: int
+    oid: str
+
+    def __init__(self,
+                 data: Buffer,
+		 key: Buffer,
+		 digest_bytes: bytes,
+		 update_after_digest: bool) -> None: ...
+    def update(self, data: Buffer) -> BLAKE2s_Hash: ...
+    def digest(self) -> bytes: ...
+    def hexdigest(self) -> str: ...
+    def verify(self, mac_tag: Buffer) -> None: ...
+    def hexverify(self, hex_mac_tag: str) -> None: ...
+    def new(self, **kwargs: Any) -> BLAKE2s_Hash: ...
+
+def new(data: Buffer = ...,
+	digest_bytes: int = ...,
+	digest_bits: int = ...,
+	key: Buffer = ...,
+	update_after_digest: bool = ...) -> BLAKE2s_Hash: ...