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✏️ /lib64/python3.9/site-packages/cryptography/hazmat/backends/openssl/ed448.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 cryptography import exceptions
from cryptography.hazmat.primitives import serialization
from cryptography.hazmat.primitives.asymmetric.ed448 import (
    Ed448PrivateKey,
    Ed448PublicKey,
)

_ED448_KEY_SIZE = 57
_ED448_SIG_SIZE = 114

class _Ed448PublicKey(Ed448PublicKey):
    def __init__(self, backend, evp_pkey):
        self._backend = backend
        self._evp_pkey = evp_pkey

def public_bytes(
        self,
        encoding: serialization.Encoding,
        format: serialization.PublicFormat,
    ) -> bytes:
        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()

return self._backend._public_key_bytes(
            encoding, format, self, self._evp_pkey, None
        )

def _raw_public_bytes(self) -> bytes:
        buf = self._backend._ffi.new("unsigned char []", _ED448_KEY_SIZE)
        buflen = self._backend._ffi.new("size_t *", _ED448_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] == _ED448_KEY_SIZE)
        return self._backend._ffi.buffer(buf, _ED448_KEY_SIZE)[:]

def verify(self, signature: bytes, data: bytes) -> None:
        evp_md_ctx = self._backend._lib.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.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

class _Ed448PrivateKey(Ed448PrivateKey):
    def __init__(self, backend, evp_pkey):
        self._backend = backend
        self._evp_pkey = evp_pkey

def public_key(self) -> Ed448PublicKey:
        buf = self._backend._ffi.new("unsigned char []", _ED448_KEY_SIZE)
        buflen = self._backend._ffi.new("size_t *", _ED448_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] == _ED448_KEY_SIZE)
        public_bytes = self._backend._ffi.buffer(buf)[:]
        return self._backend.ed448_load_public_bytes(public_bytes)

def sign(self, data: bytes) -> bytes:
        evp_md_ctx = self._backend._lib.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.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[]", _ED448_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] == _ED448_SIG_SIZE)
        return self._backend._ffi.buffer(buf, buflen[0])[:]

def private_bytes(
        self,
        encoding: serialization.Encoding,
        format: serialization.PrivateFormat,
        encryption_algorithm: serialization.KeySerializationEncryption,
    ) -> bytes:
        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()

return self._backend._private_key_bytes(
            encoding, format, encryption_algorithm, self, self._evp_pkey, None
        )

def _raw_private_bytes(self) -> bytes:
        buf = self._backend._ffi.new("unsigned char []", _ED448_KEY_SIZE)
        buflen = self._backend._ffi.new("size_t *", _ED448_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] == _ED448_KEY_SIZE)
        return self._backend._ffi.buffer(buf, _ED448_KEY_SIZE)[:]

Batal

⬅ backends 21 item

Nama	Tipe	Ukuran	Diubah	Perm	Aksi
📁 __pycache__	dir	—	28/11/25 19:18	0755	📂
🐍 __init__.py	py	271 B	15/12/21 04:49	0644	✏️ ⬇
🐍 aead.py	py	6.1 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 backend.py	py	86.2 KB	18/09/25 15:50	0644	✏️ ⬇
🐍 ciphers.py	py	10.1 KB	18/09/25 15:50	0644	✏️ ⬇
🐍 cmac.py	py	2.8 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 decode_asn1.py	py	1.1 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 dh.py	py	10.9 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 dsa.py	py	10.5 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 ec.py	py	12.5 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 ed25519.py	py	5.7 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 ed448.py	py	5.6 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 encode_asn1.py	py	570 B	15/12/21 04:49	0644	✏️ ⬇
🐍 hashes.py	py	3 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 hmac.py	py	2.9 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 poly1305.py	py	2.3 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 rsa.py	py	21 KB	18/09/25 15:50	0644	✏️ ⬇
🐍 utils.py	py	2.4 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 x25519.py	py	4.5 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 x448.py	py	4 KB	15/12/21 04:49	0644	✏️ ⬇
🐍 x509.py	py	1.4 KB	15/12/21 04:49	0644	✏️ ⬇

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