diff options
Diffstat (limited to 'cryptography/hazmat/backends/openssl/backend.py')
-rw-r--r-- | cryptography/hazmat/backends/openssl/backend.py | 53 |
1 files changed, 2 insertions, 51 deletions
diff --git a/cryptography/hazmat/backends/openssl/backend.py b/cryptography/hazmat/backends/openssl/backend.py index 81f944e5..5776ea6f 100644 --- a/cryptography/hazmat/backends/openssl/backend.py +++ b/cryptography/hazmat/backends/openssl/backend.py @@ -39,13 +39,14 @@ from cryptography.hazmat.backends.openssl.ec import ( _ECDSASignatureContext, _ECDSAVerificationContext, _EllipticCurvePrivateKey, _EllipticCurvePublicKey ) +from cryptography.hazmat.backends.openssl.hashes import _HashContext from cryptography.hazmat.backends.openssl.hmac import _HMACContext from cryptography.hazmat.backends.openssl.rsa import ( _RSAPrivateKey, _RSAPublicKey, _RSASignatureContext, _RSAVerificationContext ) from cryptography.hazmat.bindings.openssl.binding import Binding -from cryptography.hazmat.primitives import hashes, interfaces +from cryptography.hazmat.primitives import hashes from cryptography.hazmat.primitives.asymmetric import dsa, ec, rsa from cryptography.hazmat.primitives.asymmetric.padding import ( MGF1, OAEP, PKCS1v15, PSS @@ -1179,54 +1180,4 @@ class GetCipherByName(object): return backend._lib.EVP_get_cipherbyname(cipher_name.encode("ascii")) -@utils.register_interface(interfaces.HashContext) -class _HashContext(object): - def __init__(self, backend, algorithm, ctx=None): - self.algorithm = algorithm - - self._backend = backend - - if ctx is None: - ctx = self._backend._lib.EVP_MD_CTX_create() - ctx = self._backend._ffi.gc(ctx, - self._backend._lib.EVP_MD_CTX_destroy) - evp_md = self._backend._lib.EVP_get_digestbyname( - algorithm.name.encode("ascii")) - if evp_md == self._backend._ffi.NULL: - raise UnsupportedAlgorithm( - "{0} is not a supported hash on this backend.".format( - algorithm.name), - _Reasons.UNSUPPORTED_HASH - ) - res = self._backend._lib.EVP_DigestInit_ex(ctx, evp_md, - self._backend._ffi.NULL) - assert res != 0 - - self._ctx = ctx - - def copy(self): - copied_ctx = self._backend._lib.EVP_MD_CTX_create() - copied_ctx = self._backend._ffi.gc( - copied_ctx, self._backend._lib.EVP_MD_CTX_destroy - ) - res = self._backend._lib.EVP_MD_CTX_copy_ex(copied_ctx, self._ctx) - assert res != 0 - return _HashContext(self._backend, self.algorithm, ctx=copied_ctx) - - def update(self, data): - res = self._backend._lib.EVP_DigestUpdate(self._ctx, data, len(data)) - assert res != 0 - - def finalize(self): - buf = self._backend._ffi.new("unsigned char[]", - self._backend._lib.EVP_MAX_MD_SIZE) - outlen = self._backend._ffi.new("unsigned int *") - res = self._backend._lib.EVP_DigestFinal_ex(self._ctx, buf, outlen) - assert res != 0 - assert outlen[0] == self.algorithm.digest_size - res = self._backend._lib.EVP_MD_CTX_cleanup(self._ctx) - assert res == 1 - return self._backend._ffi.buffer(buf)[:outlen[0]] - - backend = Backend() |