Python crypto_sign_ed25519_pk_to_curve25519 예제들

예제 #1

파일: crypto_sign.py 프로젝트: superdarkbit/pynacl

def crypto_sign_ed25519_pk_to_curve25519(public_key_bytes):
    """
    Converts a public Ed25519 key (encoded as bytes ``public_key_bytes``) to
    a public Curve25519 key as bytes.

    Raises a ValueError if ``public_key_bytes`` is not of length
    ``crypto_sign_PUBLICKEYBYTES``

    :param public_key_bytes: bytes
    :rtype: bytes
    """
    if len(public_key_bytes) != crypto_sign_PUBLICKEYBYTES:
        raise exc.ValueError("Invalid curve public key")

    curve_public_key_len = crypto_sign_curve25519_BYTES
    curve_public_key = ffi.new("unsigned char[]", curve_public_key_len)

    rc = lib.crypto_sign_ed25519_pk_to_curve25519(curve_public_key,
                                                  public_key_bytes)
    ensure(rc == 0, 'Unexpected library error', raising=exc.RuntimeError)

    return ffi.buffer(curve_public_key, curve_public_key_len)[:]

예제 #2

파일: crypto_sign.py 프로젝트: NegativeMjark/pynacl

def crypto_sign_ed25519_pk_to_curve25519(public_key_bytes):
    """
    Converts a public Ed25519 key (encoded as bytes ``public_key_bytes``) to
    a public Curve25519 key as bytes.

    Raises a ValueError if ``public_key_bytes`` is not of length
    ``crypto_sign_PUBLICKEYBYTES``

    :param public_key_bytes: bytes
    :rtype: bytes
    """
    if len(public_key_bytes) != crypto_sign_PUBLICKEYBYTES:
        raise ValueError("Invalid curve public key")

    curve_public_key_len = crypto_sign_curve25519_BYTES
    curve_public_key = ffi.new("unsigned char[]", curve_public_key_len)

    rc = lib.crypto_sign_ed25519_pk_to_curve25519(curve_public_key,
                                                  public_key_bytes)
    assert rc == 0

    return ffi.buffer(curve_public_key, curve_public_key_len)[:]