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| author | Alex Gaynor <alex.gaynor@gmail.com> | 2013-11-12 14:27:55 -0800 |
|---|---|---|
| committer | Alex Gaynor <alex.gaynor@gmail.com> | 2013-11-12 14:27:55 -0800 |
| commit | 3f3921e2d082fd99c6186ed7bb174caf481819bd (patch) | |
| tree | b611101e6e2c9bdabdb1d3c4615548f1d14f3e38 | |
| parent | 906e195b2ea255d0e8153c25d273c918ea313ce3 (diff) | |
| download | cryptography-3f3921e2d082fd99c6186ed7bb174caf481819bd.tar.gz cryptography-3f3921e2d082fd99c6186ed7bb174caf481819bd.tar.bz2 cryptography-3f3921e2d082fd99c6186ed7bb174caf481819bd.zip | |
Don't query OpenSSL for block sizes, we already know them
| -rw-r--r-- | cryptography/hazmat/bindings/openssl/backend.py | 7 | ||||
| -rw-r--r-- | cryptography/hazmat/primitives/ciphers/algorithms.py | 1 |
2 files changed, 4 insertions, 4 deletions
diff --git a/cryptography/hazmat/bindings/openssl/backend.py b/cryptography/hazmat/bindings/openssl/backend.py index 235a8e30..89ee2b53 100644 --- a/cryptography/hazmat/bindings/openssl/backend.py +++ b/cryptography/hazmat/bindings/openssl/backend.py @@ -140,6 +140,7 @@ class _CipherContext(object): def __init__(self, backend, cipher, mode, operation): self._backend = backend + self._cipher = cipher ctx = self._backend.lib.EVP_CIPHER_CTX_new() ctx = self._backend.ffi.gc(ctx, self._backend.lib.EVP_CIPHER_CTX_free) @@ -185,9 +186,8 @@ class _CipherContext(object): self._ctx = ctx def update(self, data): - block_size = self._backend.lib.EVP_CIPHER_CTX_block_size(self._ctx) buf = self._backend.ffi.new("unsigned char[]", - len(data) + block_size - 1) + len(data) + self._cipher.block_size - 1) outlen = self._backend.ffi.new("int *") res = self._backend.lib.EVP_CipherUpdate(self._ctx, buf, outlen, data, len(data)) @@ -195,8 +195,7 @@ class _CipherContext(object): return self._backend.ffi.buffer(buf)[:outlen[0]] def finalize(self): - block_size = self._backend.lib.EVP_CIPHER_CTX_block_size(self._ctx) - buf = self._backend.ffi.new("unsigned char[]", block_size) + buf = self._backend.ffi.new("unsigned char[]", self._cipher.block_size) outlen = self._backend.ffi.new("int *") res = self._backend.lib.EVP_CipherFinal_ex(self._ctx, buf, outlen) assert res != 0 diff --git a/cryptography/hazmat/primitives/ciphers/algorithms.py b/cryptography/hazmat/primitives/ciphers/algorithms.py index cbfaceb8..61e93b0e 100644 --- a/cryptography/hazmat/primitives/ciphers/algorithms.py +++ b/cryptography/hazmat/primitives/ciphers/algorithms.py @@ -120,6 +120,7 @@ class CAST5(object): class ARC4(object): name = "RC4" + block_size = 1 key_sizes = frozenset([40, 56, 64, 80, 128, 192, 256]) def __init__(self, key): |