Current Path: > > opt > cloudlinux > venv > lib > python3.11 > site-packages > cryptography > hazmat > backends > > openssl
Operation : Linux premium131.web-hosting.com 4.18.0-553.44.1.lve.el8.x86_64 #1 SMP Thu Mar 13 14:29:12 UTC 2025 x86_64 Software : Apache Server IP : 162.0.232.56 | Your IP: 216.73.216.111 Domains : 1034 Domain(s) Permission : [ 0755 ]
Name | Type | Size | Last Modified | Actions |
---|---|---|---|---|
__pycache__ | Directory | - | - | |
__init__.py | File | 305 bytes | April 17 2025 13:10:59. | |
aead.py | File | 15967 bytes | April 17 2025 13:10:59. | |
backend.py | File | 73231 bytes | April 17 2025 13:10:59. | |
ciphers.py | File | 10358 bytes | April 17 2025 13:10:59. | |
cmac.py | File | 3035 bytes | April 17 2025 13:10:59. | |
decode_asn1.py | File | 1148 bytes | April 17 2025 13:10:59. | |
ec.py | File | 11474 bytes | April 17 2025 13:10:59. | |
rsa.py | File | 21825 bytes | April 17 2025 13:10:59. | |
utils.py | File | 2190 bytes | April 17 2025 13:10:59. |
# This file is dual licensed under the terms of the Apache License, Version # 2.0, and the BSD License. See the LICENSE file in the root of this repository # for complete details. from __future__ import annotations import typing from cryptography.exceptions import ( InvalidSignature, UnsupportedAlgorithm, _Reasons, ) from cryptography.hazmat.primitives import constant_time from cryptography.hazmat.primitives.ciphers.modes import CBC if typing.TYPE_CHECKING: from cryptography.hazmat.backends.openssl.backend import Backend from cryptography.hazmat.primitives import ciphers class _CMACContext: def __init__( self, backend: Backend, algorithm: ciphers.BlockCipherAlgorithm, ctx=None, ) -> None: if not backend.cmac_algorithm_supported(algorithm): raise UnsupportedAlgorithm( "This backend does not support CMAC.", _Reasons.UNSUPPORTED_CIPHER, ) self._backend = backend self._key = algorithm.key self._algorithm = algorithm self._output_length = algorithm.block_size // 8 if ctx is None: registry = self._backend._cipher_registry adapter = registry[type(algorithm), CBC] evp_cipher = adapter(self._backend, algorithm, CBC) ctx = self._backend._lib.CMAC_CTX_new() self._backend.openssl_assert(ctx != self._backend._ffi.NULL) ctx = self._backend._ffi.gc(ctx, self._backend._lib.CMAC_CTX_free) key_ptr = self._backend._ffi.from_buffer(self._key) res = self._backend._lib.CMAC_Init( ctx, key_ptr, len(self._key), evp_cipher, self._backend._ffi.NULL, ) self._backend.openssl_assert(res == 1) self._ctx = ctx def update(self, data: bytes) -> None: res = self._backend._lib.CMAC_Update(self._ctx, data, len(data)) self._backend.openssl_assert(res == 1) def finalize(self) -> bytes: buf = self._backend._ffi.new("unsigned char[]", self._output_length) length = self._backend._ffi.new("size_t *", self._output_length) res = self._backend._lib.CMAC_Final(self._ctx, buf, length) self._backend.openssl_assert(res == 1) self._ctx = None return self._backend._ffi.buffer(buf)[:] def copy(self) -> _CMACContext: copied_ctx = self._backend._lib.CMAC_CTX_new() copied_ctx = self._backend._ffi.gc( copied_ctx, self._backend._lib.CMAC_CTX_free ) res = self._backend._lib.CMAC_CTX_copy(copied_ctx, self._ctx) self._backend.openssl_assert(res == 1) return _CMACContext(self._backend, self._algorithm, ctx=copied_ctx) def verify(self, signature: bytes) -> None: digest = self.finalize() if not constant_time.bytes_eq(digest, signature): raise InvalidSignature("Signature did not match digest.")
SILENT KILLER Tool