//usr/lib64/python3.9/site-packages/cryptography/hazmat/backends/openssl
21 items
NAME ↑ SIZE MODIFIED PERMS ACTIONS
.. / Parent Directory
__pycache__ — dir
2026-06-04 04:18 · rwxr-xr-x
— 2026-06-04 04:18 rwxr-xr-x
__init__.py — 271 B
2021-12-14 21:49 · rw-r--r--
271 B 2021-12-14 21:49 rw-r--r--
aead.py — 6.1 KB
2021-12-14 21:49 · rw-r--r--
6.1 KB 2021-12-14 21:49 rw-r--r--
backend.py — 86.21 KB
2025-09-18 08:50 · rw-r--r--
86.21 KB 2025-09-18 08:50 rw-r--r--
ciphers.py — 10.15 KB
2025-09-18 08:50 · rw-r--r--
10.15 KB 2025-09-18 08:50 rw-r--r--
cmac.py — 2.78 KB
2021-12-14 21:49 · rw-r--r--
2.78 KB 2021-12-14 21:49 rw-r--r--
decode_asn1.py — 1.09 KB
2021-12-14 21:49 · rw-r--r--
1.09 KB 2021-12-14 21:49 rw-r--r--
dh.py — 10.95 KB
2021-12-14 21:49 · rw-r--r--
10.95 KB 2021-12-14 21:49 rw-r--r--
dsa.py — 10.46 KB
2021-12-14 21:49 · rw-r--r--
10.46 KB 2021-12-14 21:49 rw-r--r--
ec.py — 12.54 KB
2021-12-14 21:49 · rw-r--r--
12.54 KB 2021-12-14 21:49 rw-r--r--
ed25519.py — 5.65 KB
2021-12-14 21:49 · rw-r--r--
5.65 KB 2021-12-14 21:49 rw-r--r--
ed448.py — 5.61 KB
2021-12-14 21:49 · rw-r--r--
5.61 KB 2021-12-14 21:49 rw-r--r--
encode_asn1.py — 570 B
2021-12-14 21:49 · rw-r--r--
570 B 2021-12-14 21:49 rw-r--r--
hashes.py — 3.03 KB
2021-12-14 21:49 · rw-r--r--
3.03 KB 2021-12-14 21:49 rw-r--r--
hmac.py — 2.87 KB
2021-12-14 21:49 · rw-r--r--
2.87 KB 2021-12-14 21:49 rw-r--r--
poly1305.py — 2.29 KB
2021-12-14 21:49 · rw-r--r--
2.29 KB 2021-12-14 21:49 rw-r--r--
rsa.py — 20.95 KB
2025-09-18 08:50 · rw-r--r--
20.95 KB 2025-09-18 08:50 rw-r--r--
utils.py — 2.39 KB
2021-12-14 21:49 · rw-r--r--
2.39 KB 2021-12-14 21:49 rw-r--r--
x25519.py — 4.51 KB
2021-12-14 21:49 · rw-r--r--
4.51 KB 2021-12-14 21:49 rw-r--r--
x448.py — 4.04 KB
2021-12-14 21:49 · rw-r--r--
4.04 KB 2021-12-14 21:49 rw-r--r--
x509.py — 1.42 KB
2021-12-14 21:49 · rw-r--r--
1.42 KB 2021-12-14 21:49 rw-r--r--
ONLINE
openssl
21 items
22:56:05
TERMINAL FM
NAVIGATION
ACTIONS
SELECTION
Edit
Preview
Download
Rename
Copy
Chmod
Delete
# 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 cryptography.exceptions import InvalidSignature from cryptography.hazmat.primitives import constant_time _POLY1305_TAG_SIZE = 16 _POLY1305_KEY_SIZE = 32 class _Poly1305Context(object): def __init__(self, backend, key): self._backend = backend key_ptr = self._backend._ffi.from_buffer(key) # This function copies the key into OpenSSL-owned memory so we don't # need to retain it ourselves evp_pkey = self._backend._lib.EVP_PKEY_new_raw_private_key( self._backend._lib.NID_poly1305, self._backend._ffi.NULL, key_ptr, len(key), ) self._backend.openssl_assert(evp_pkey != self._backend._ffi.NULL) self._evp_pkey = self._backend._ffi.gc( evp_pkey, self._backend._lib.EVP_PKEY_free ) ctx = self._backend._lib.EVP_MD_CTX_new() self._backend.openssl_assert(ctx != self._backend._ffi.NULL) self._ctx = self._backend._ffi.gc( ctx, self._backend._lib.EVP_MD_CTX_free ) res = self._backend._lib.EVP_DigestSignInit( self._ctx, self._backend._ffi.NULL, self._backend._ffi.NULL, self._backend._ffi.NULL, self._evp_pkey, ) self._backend.openssl_assert(res == 1) def update(self, data): data_ptr = self._backend._ffi.from_buffer(data) res = self._backend._lib.EVP_DigestSignUpdate( self._ctx, data_ptr, len(data) ) self._backend.openssl_assert(res != 0) def finalize(self): buf = self._backend._ffi.new("unsigned char[]", _POLY1305_TAG_SIZE) outlen = self._backend._ffi.new("size_t *", _POLY1305_TAG_SIZE) res = self._backend._lib.EVP_DigestSignFinal(self._ctx, buf, outlen) self._backend.openssl_assert(res != 0) self._backend.openssl_assert(outlen[0] == _POLY1305_TAG_SIZE) return self._backend._ffi.buffer(buf)[: outlen[0]] def verify(self, tag): mac = self.finalize() if not constant_time.bytes_eq(mac, tag): raise InvalidSignature("Value did not match computed tag.")