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📄 __init__.py
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📁 __pycache__/
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📄 aead.py
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📄 backend.py
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📄 ciphers.py
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📄 cmac.py
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📄 decode_asn1.py
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📄 dh.py
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📄 dsa.py
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📄 ec.py
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📄 ed25519.py
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📄 ed448.py
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📄 encode_asn1.py
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📄 hashes.py
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📄 hmac.py
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📄 poly1305.py
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📄 rsa.py
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📄 utils.py
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📄 x25519.py
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📄 x448.py
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📄 x509.py
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BERHASIL DIUBAH!
EDITING: dsa.py
# 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. import typing from cryptography import utils from cryptography.exceptions import InvalidSignature from cryptography.hazmat.backends.openssl.utils import ( _calculate_digest_and_algorithm, _check_not_prehashed, _warn_sign_verify_deprecated, ) from cryptography.hazmat.primitives import hashes, serialization from cryptography.hazmat.primitives.asymmetric import ( AsymmetricSignatureContext, AsymmetricVerificationContext, dsa, utils as asym_utils, ) def _dsa_sig_sign(backend, private_key, data): sig_buf_len = backend._lib.DSA_size(private_key._dsa_cdata) sig_buf = backend._ffi.new("unsigned char[]", sig_buf_len) buflen = backend._ffi.new("unsigned int *") # The first parameter passed to DSA_sign is unused by OpenSSL but # must be an integer. res = backend._lib.DSA_sign( 0, data, len(data), sig_buf, buflen, private_key._dsa_cdata ) backend.openssl_assert(res == 1) backend.openssl_assert(buflen[0]) return backend._ffi.buffer(sig_buf)[: buflen[0]] def _dsa_sig_verify(backend, public_key, signature, data): # The first parameter passed to DSA_verify is unused by OpenSSL but # must be an integer. res = backend._lib.DSA_verify( 0, data, len(data), signature, len(signature), public_key._dsa_cdata ) if res != 1: backend._consume_errors() raise InvalidSignature class _DSAVerificationContext(AsymmetricVerificationContext): def __init__(self, backend, public_key, signature, algorithm): self._backend = backend self._public_key = public_key self._signature = signature self._algorithm = algorithm self._hash_ctx = hashes.Hash(self._algorithm, self._backend) def update(self, data: bytes): self._hash_ctx.update(data) def verify(self) -> None: data_to_verify = self._hash_ctx.finalize() _dsa_sig_verify( self._backend, self._public_key, self._signature, data_to_verify ) class _DSASignatureContext(AsymmetricSignatureContext): def __init__( self, backend, private_key: dsa.DSAPrivateKey, algorithm: hashes.HashAlgorithm, ): self._backend = backend self._private_key = private_key self._algorithm = algorithm self._hash_ctx = hashes.Hash(self._algorithm, self._backend) def update(self, data: bytes) -> None: self._hash_ctx.update(data) def finalize(self) -> bytes: data_to_sign = self._hash_ctx.finalize() return _dsa_sig_sign(self._backend, self._private_key, data_to_sign) class _DSAParameters(dsa.DSAParameters): def __init__(self, backend, dsa_cdata): self._backend = backend self._dsa_cdata = dsa_cdata def parameter_numbers(self) -> dsa.DSAParameterNumbers: p = self._backend._ffi.new("BIGNUM **") q = self._backend._ffi.new("BIGNUM **") g = self._backend._ffi.new("BIGNUM **") self._backend._lib.DSA_get0_pqg(self._dsa_cdata, p, q, g) self._backend.openssl_assert(p[0] != self._backend._ffi.NULL) self._backend.openssl_assert(q[0] != self._backend._ffi.NULL) self._backend.openssl_assert(g[0] != self._backend._ffi.NULL) return dsa.DSAParameterNumbers( p=self._backend._bn_to_int(p[0]), q=self._backend._bn_to_int(q[0]), g=self._backend._bn_to_int(g[0]), ) def generate_private_key(self) -> dsa.DSAPrivateKey: return self._backend.generate_dsa_private_key(self) class _DSAPrivateKey(dsa.DSAPrivateKey): def __init__(self, backend, dsa_cdata, evp_pkey): self._backend = backend self._dsa_cdata = dsa_cdata self._evp_pkey = evp_pkey p = self._backend._ffi.new("BIGNUM **") self._backend._lib.DSA_get0_pqg( dsa_cdata, p, self._backend._ffi.NULL, self._backend._ffi.NULL ) self._backend.openssl_assert(p[0] != backend._ffi.NULL) self._key_size = self._backend._lib.BN_num_bits(p[0]) key_size = utils.read_only_property("_key_size") def signer( self, signature_algorithm: hashes.HashAlgorithm ) -> AsymmetricSignatureContext: _warn_sign_verify_deprecated() _check_not_prehashed(signature_algorithm) return _DSASignatureContext(self._backend, self, signature_algorithm) def private_numbers(self) -> dsa.DSAPrivateNumbers: p = self._backend._ffi.new("BIGNUM **") q = self._backend._ffi.new("BIGNUM **") g = self._backend._ffi.new("BIGNUM **") pub_key = self._backend._ffi.new("BIGNUM **") priv_key = self._backend._ffi.new("BIGNUM **") self._backend._lib.DSA_get0_pqg(self._dsa_cdata, p, q, g) self._backend.openssl_assert(p[0] != self._backend._ffi.NULL) self._backend.openssl_assert(q[0] != self._backend._ffi.NULL) self._backend.openssl_assert(g[0] != self._backend._ffi.NULL) self._backend._lib.DSA_get0_key(self._dsa_cdata, pub_key, priv_key) self._backend.openssl_assert(pub_key[0] != self._backend._ffi.NULL) self._backend.openssl_assert(priv_key[0] != self._backend._ffi.NULL) return dsa.DSAPrivateNumbers( public_numbers=dsa.DSAPublicNumbers( parameter_numbers=dsa.DSAParameterNumbers( p=self._backend._bn_to_int(p[0]), q=self._backend._bn_to_int(q[0]), g=self._backend._bn_to_int(g[0]), ), y=self._backend._bn_to_int(pub_key[0]), ), x=self._backend._bn_to_int(priv_key[0]), ) def public_key(self) -> dsa.DSAPublicKey: dsa_cdata = self._backend._lib.DSAparams_dup(self._dsa_cdata) self._backend.openssl_assert(dsa_cdata != self._backend._ffi.NULL) dsa_cdata = self._backend._ffi.gc( dsa_cdata, self._backend._lib.DSA_free ) pub_key = self._backend._ffi.new("BIGNUM **") self._backend._lib.DSA_get0_key( self._dsa_cdata, pub_key, self._backend._ffi.NULL ) self._backend.openssl_assert(pub_key[0] != self._backend._ffi.NULL) pub_key_dup = self._backend._lib.BN_dup(pub_key[0]) res = self._backend._lib.DSA_set0_key( dsa_cdata, pub_key_dup, self._backend._ffi.NULL ) self._backend.openssl_assert(res == 1) evp_pkey = self._backend._dsa_cdata_to_evp_pkey(dsa_cdata) return _DSAPublicKey(self._backend, dsa_cdata, evp_pkey) def parameters(self) -> dsa.DSAParameters: dsa_cdata = self._backend._lib.DSAparams_dup(self._dsa_cdata) self._backend.openssl_assert(dsa_cdata != self._backend._ffi.NULL) dsa_cdata = self._backend._ffi.gc( dsa_cdata, self._backend._lib.DSA_free ) return _DSAParameters(self._backend, dsa_cdata) def private_bytes( self, encoding: serialization.Encoding, format: serialization.PrivateFormat, encryption_algorithm: serialization.KeySerializationEncryption, ) -> bytes: return self._backend._private_key_bytes( encoding, format, encryption_algorithm, self, self._evp_pkey, self._dsa_cdata, ) def sign( self, data: bytes, algorithm: typing.Union[asym_utils.Prehashed, hashes.HashAlgorithm], ) -> bytes: data, algorithm = _calculate_digest_and_algorithm( self._backend, data, algorithm ) return _dsa_sig_sign(self._backend, self, data) class _DSAPublicKey(dsa.DSAPublicKey): def __init__(self, backend, dsa_cdata, evp_pkey): self._backend = backend self._dsa_cdata = dsa_cdata self._evp_pkey = evp_pkey p = self._backend._ffi.new("BIGNUM **") self._backend._lib.DSA_get0_pqg( dsa_cdata, p, self._backend._ffi.NULL, self._backend._ffi.NULL ) self._backend.openssl_assert(p[0] != backend._ffi.NULL) self._key_size = self._backend._lib.BN_num_bits(p[0]) key_size = utils.read_only_property("_key_size") def verifier( self, signature: bytes, signature_algorithm: hashes.HashAlgorithm, ) -> AsymmetricVerificationContext: _warn_sign_verify_deprecated() utils._check_bytes("signature", signature) _check_not_prehashed(signature_algorithm) return _DSAVerificationContext( self._backend, self, signature, signature_algorithm ) def public_numbers(self) -> dsa.DSAPublicNumbers: p = self._backend._ffi.new("BIGNUM **") q = self._backend._ffi.new("BIGNUM **") g = self._backend._ffi.new("BIGNUM **") pub_key = self._backend._ffi.new("BIGNUM **") self._backend._lib.DSA_get0_pqg(self._dsa_cdata, p, q, g) self._backend.openssl_assert(p[0] != self._backend._ffi.NULL) self._backend.openssl_assert(q[0] != self._backend._ffi.NULL) self._backend.openssl_assert(g[0] != self._backend._ffi.NULL) self._backend._lib.DSA_get0_key( self._dsa_cdata, pub_key, self._backend._ffi.NULL ) self._backend.openssl_assert(pub_key[0] != self._backend._ffi.NULL) return dsa.DSAPublicNumbers( parameter_numbers=dsa.DSAParameterNumbers( p=self._backend._bn_to_int(p[0]), q=self._backend._bn_to_int(q[0]), g=self._backend._bn_to_int(g[0]), ), y=self._backend._bn_to_int(pub_key[0]), ) def parameters(self) -> dsa.DSAParameters: dsa_cdata = self._backend._lib.DSAparams_dup(self._dsa_cdata) dsa_cdata = self._backend._ffi.gc( dsa_cdata, self._backend._lib.DSA_free ) return _DSAParameters(self._backend, dsa_cdata) def public_bytes( self, encoding: serialization.Encoding, format: serialization.PublicFormat, ) -> bytes: return self._backend._public_key_bytes( encoding, format, self, self._evp_pkey, None ) def verify( self, signature: bytes, data: bytes, algorithm: typing.Union[asym_utils.Prehashed, hashes.HashAlgorithm], ) -> None: data, algorithm = _calculate_digest_and_algorithm( self._backend, data, algorithm ) return _dsa_sig_verify(self._backend, self, signature, data)
SIMPAN PERUBAHAN