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__init__.py
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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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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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Editing: ed25519.py
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# 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 absolute_import, division, print_function from cryptography import exceptions, utils from cryptography.hazmat.primitives import serialization from cryptography.hazmat.primitives.asymmetric.ed25519 import ( Ed25519PrivateKey, Ed25519PublicKey, _ED25519_KEY_SIZE, _ED25519_SIG_SIZE ) @utils.register_interface(Ed25519PublicKey) class _Ed25519PublicKey(object): def __init__(self, backend, evp_pkey): self._backend = backend self._evp_pkey = evp_pkey def public_bytes(self, encoding, format): if ( encoding is serialization.Encoding.Raw or format is serialization.PublicFormat.Raw ): if ( encoding is not serialization.Encoding.Raw or format is not serialization.PublicFormat.Raw ): raise ValueError( "When using Raw both encoding and format must be Raw" ) return self._raw_public_bytes() if ( encoding in serialization._PEM_DER and format is not serialization.PublicFormat.SubjectPublicKeyInfo ): raise ValueError( "format must be SubjectPublicKeyInfo when encoding is PEM or " "DER" ) return self._backend._public_key_bytes( encoding, format, self, self._evp_pkey, None ) def _raw_public_bytes(self): buf = self._backend._ffi.new("unsigned char []", _ED25519_KEY_SIZE) buflen = self._backend._ffi.new("size_t *", _ED25519_KEY_SIZE) res = self._backend._lib.EVP_PKEY_get_raw_public_key( self._evp_pkey, buf, buflen ) self._backend.openssl_assert(res == 1) self._backend.openssl_assert(buflen[0] == _ED25519_KEY_SIZE) return self._backend._ffi.buffer(buf, _ED25519_KEY_SIZE)[:] def verify(self, signature, data): evp_md_ctx = self._backend._lib.Cryptography_EVP_MD_CTX_new() self._backend.openssl_assert(evp_md_ctx != self._backend._ffi.NULL) evp_md_ctx = self._backend._ffi.gc( evp_md_ctx, self._backend._lib.Cryptography_EVP_MD_CTX_free ) res = self._backend._lib.EVP_DigestVerifyInit( evp_md_ctx, self._backend._ffi.NULL, self._backend._ffi.NULL, self._backend._ffi.NULL, self._evp_pkey ) self._backend.openssl_assert(res == 1) res = self._backend._lib.EVP_DigestVerify( evp_md_ctx, signature, len(signature), data, len(data) ) if res != 1: self._backend._consume_errors() raise exceptions.InvalidSignature @utils.register_interface(Ed25519PrivateKey) class _Ed25519PrivateKey(object): def __init__(self, backend, evp_pkey): self._backend = backend self._evp_pkey = evp_pkey def public_key(self): buf = self._backend._ffi.new("unsigned char []", _ED25519_KEY_SIZE) buflen = self._backend._ffi.new("size_t *", _ED25519_KEY_SIZE) res = self._backend._lib.EVP_PKEY_get_raw_public_key( self._evp_pkey, buf, buflen ) self._backend.openssl_assert(res == 1) self._backend.openssl_assert(buflen[0] == _ED25519_KEY_SIZE) public_bytes = self._backend._ffi.buffer(buf)[:] return self._backend.ed25519_load_public_bytes(public_bytes) def sign(self, data): evp_md_ctx = self._backend._lib.Cryptography_EVP_MD_CTX_new() self._backend.openssl_assert(evp_md_ctx != self._backend._ffi.NULL) evp_md_ctx = self._backend._ffi.gc( evp_md_ctx, self._backend._lib.Cryptography_EVP_MD_CTX_free ) res = self._backend._lib.EVP_DigestSignInit( evp_md_ctx, self._backend._ffi.NULL, self._backend._ffi.NULL, self._backend._ffi.NULL, self._evp_pkey ) self._backend.openssl_assert(res == 1) buf = self._backend._ffi.new("unsigned char[]", _ED25519_SIG_SIZE) buflen = self._backend._ffi.new("size_t *", len(buf)) res = self._backend._lib.EVP_DigestSign( evp_md_ctx, buf, buflen, data, len(data) ) self._backend.openssl_assert(res == 1) self._backend.openssl_assert(buflen[0] == _ED25519_SIG_SIZE) return self._backend._ffi.buffer(buf, buflen[0])[:] def private_bytes(self, encoding, format, encryption_algorithm): if ( encoding is serialization.Encoding.Raw or format is serialization.PublicFormat.Raw ): if ( format is not serialization.PrivateFormat.Raw or encoding is not serialization.Encoding.Raw or not isinstance(encryption_algorithm, serialization.NoEncryption) ): raise ValueError( "When using Raw both encoding and format must be Raw " "and encryption_algorithm must be NoEncryption()" ) return self._raw_private_bytes() if ( encoding in serialization._PEM_DER and format is not serialization.PrivateFormat.PKCS8 ): raise ValueError( "format must be PKCS8 when encoding is PEM or DER" ) return self._backend._private_key_bytes( encoding, format, encryption_algorithm, self._evp_pkey, None ) def _raw_private_bytes(self): buf = self._backend._ffi.new("unsigned char []", _ED25519_KEY_SIZE) buflen = self._backend._ffi.new("size_t *", _ED25519_KEY_SIZE) res = self._backend._lib.EVP_PKEY_get_raw_private_key( self._evp_pkey, buf, buflen ) self._backend.openssl_assert(res == 1) self._backend.openssl_assert(buflen[0] == _ED25519_KEY_SIZE) return self._backend._ffi.buffer(buf, _ED25519_KEY_SIZE)[:]