Python _raw_api.VoidPointer类代码示例

    def __init__(self, data, key, digest_bytes):
        """
        Initialize a BLAKE2s hash object.
        """

        #: The size of the resulting hash in bytes.
        self.digest_size = digest_bytes

        # See https://tools.ietf.org/html/draft-saarinen-blake2-02
        if digest_bytes in (16, 20, 28, 32) and not key:
            self.oid = "1.3.6.1.4.1.1722.12.2.2." + str(digest_bytes)

        expect_byte_string(key)

        state = VoidPointer()
        result = _raw_blake2s_lib.blake2s_init(state.address_of(),
                                               key,
                                               c_size_t(len(key)),
                                               c_size_t(digest_bytes)
                                               )
        if result:
            raise ValueError("Error %d while instantiating BLAKE2s" % result)
        self._state = SmartPointer(state.get(),
                                   _raw_blake2s_lib.blake2s_destroy)
        if data:
            self.update(data)

def _create_base_cipher(dict_parameters):
    """This method instantiates and returns a handle to a low-level base cipher.
    It will absorb named parameters in the process."""

    try:
        key = dict_parameters.pop("key")
    except KeyError:
        raise TypeError("Missing 'key' parameter")

    expect_byte_string(key)

    if len(key) not in key_size:
        raise ValueError("Incorrect TDES key length (%d bytes)" % len(key))

    start_operation = _raw_des3_lib.DES3_start_operation
    stop_operation = _raw_des3_lib.DES3_stop_operation

    cipher = VoidPointer()
    result = start_operation(key,
                             c_size_t(len(key)),
                             cipher.address_of())
    if result:
        raise ValueError("Error %X while instantiating the TDES cipher"
                         % result)
    return SmartPointer(cipher.get(), stop_operation)

    def __init__(self, data, key, digest_bytes, update_after_digest):

        # The size of the resulting hash in bytes.
        self.digest_size = digest_bytes

        self._update_after_digest = update_after_digest
        self._digest_done = False

        # See https://tools.ietf.org/html/rfc7693
        if digest_bytes in (20, 32, 48, 64) and not key:
            self.oid = "1.3.6.1.4.1.1722.12.2.1." + str(digest_bytes)

        expect_byte_string(key)

        state = VoidPointer()
        result = _raw_blake2b_lib.blake2b_init(state.address_of(),
                                               key,
                                               c_size_t(len(key)),
                                               c_size_t(digest_bytes)
                                               )
        if result:
            raise ValueError("Error %d while instantiating BLAKE2b" % result)
        self._state = SmartPointer(state.get(),
                                   _raw_blake2b_lib.blake2b_destroy)
        if data:
            self.update(data)

def _create_base_cipher(dict_parameters):
    """This method instantiates and returns a handle to a low-level
    base cipher. It will absorb named parameters in the process."""

    try:
        key = dict_parameters.pop("key")
    except KeyError:
        raise TypeError("Missing 'key' parameter")

    effective_keylen = dict_parameters.pop("effective_keylen", 1024)

    expect_byte_string(key)

    if len(key) not in key_size:
        raise ValueError("Incorrect ARC2 key length (%d bytes)" % len(key))

    if not (0 <= effective_keylen <= 1024):
        raise ValueError("'effective_key_len' must be positive and no larger than 1024")

    start_operation = _raw_arc2_lib.ARC2_start_operation
    stop_operation = _raw_arc2_lib.ARC2_stop_operation

    cipher = VoidPointer()
    result = start_operation(key,
                             c_size_t(len(key)),
                             c_size_t(effective_keylen),
                             cipher.address_of())
    if result:
        raise ValueError("Error %X while instantiating the ARC2 cipher"
                         % result)

    return SmartPointer(cipher.get(), stop_operation)

    def __init__(self, data, truncate):
        self._truncate = truncate

        if truncate is None:
            self.oid = "2.16.840.1.101.3.4.2.3"
            self.digest_size = 64
        elif truncate == "224":
            self.oid = "2.16.840.1.101.3.4.2.5"
            self.digest_size = 28
        elif truncate == "256":
            self.oid = "2.16.840.1.101.3.4.2.6"
            self.digest_size = 32
        else:
            raise ValueError("Incorrect truncation length. It must be '224' or '256'.")

        state = VoidPointer()
        result = _raw_sha512_lib.SHA512_init(state.address_of(),
                                             c_size_t(self.digest_size))
        if result:
            raise ValueError("Error %d while instantiating SHA-512"
                             % result)
        self._state = SmartPointer(state.get(),
                                   _raw_sha512_lib.SHA512_destroy)
        if data:
            self.update(data)

def _create_base_cipher(dict_parameters):
    """This method instantiates and returns a handle to a low-level
    base cipher. It will absorb named parameters in the process."""

    use_aesni = dict_parameters.pop("use_aesni", True)

    try:
        key = dict_parameters.pop("key")
    except KeyError:
        raise TypeError("Missing 'key' parameter")

    if len(key) not in key_size:
        raise ValueError("Incorrect AES key length (%d bytes)" % len(key))

    if use_aesni and _raw_aesni_lib:
        start_operation = _raw_aesni_lib.AESNI_start_operation
        stop_operation = _raw_aesni_lib.AESNI_stop_operation
    else:
        start_operation = _raw_aes_lib.AES_start_operation
        stop_operation = _raw_aes_lib.AES_stop_operation

    cipher = VoidPointer()
    result = start_operation(c_uint8_ptr(key),
                             c_size_t(len(key)),
                             cipher.address_of())
    if result:
        raise ValueError("Error %X while instantiating the AES cipher"
                         % result)
    return SmartPointer(cipher.get(), stop_operation)

 def __init__(self, data=None):
     state = VoidPointer()
     result = _raw_keccak_lib.keccak_init(state.address_of(), c_size_t(64), 0x1F)
     if result:
         raise ValueError("Error %d while instantiating SHAKE256" % result)
     self._state = SmartPointer(state.get(), _raw_keccak_lib.keccak_destroy)
     self._is_squeezing = False
     if data:
         self.update(data)

 def __init__(self, data=None):
     state = VoidPointer()
     result = _raw_sha3_384_lib.SHA3_384_init(state.address_of())
     if result:
         raise ValueError("Error %d while instantiating SHA-3/384"
                          % result)
     self._state = SmartPointer(state.get(),
                                _raw_sha3_384_lib.SHA3_384_destroy)
     if data:
         self.update(data)

 def __init__(self, data=None):
     state = VoidPointer()
     result = _raw_ripemd160_lib.ripemd160_init(state.address_of())
     if result:
         raise ValueError("Error %d while instantiating RIPEMD160"
                          % result)
     self._state = SmartPointer(state.get(),
                                _raw_ripemd160_lib.ripemd160_destroy)
     if data:
         self.update(data)

    def __init__(self, data, update_after_digest):
        self._update_after_digest = update_after_digest
        self._digest_done = False

        state = VoidPointer()
        result = _raw_keccak_lib.keccak_init(state.address_of(),
                                             c_size_t(self.digest_size * 2),
                                             0x06)
        if result:
            raise ValueError("Error %d while instantiating SHA-3/384"
                             % result)
        self._state = SmartPointer(state.get(),
                                   _raw_keccak_lib.keccak_destroy)
        if data:
            self.update(data)

    def __init__(self, data, digest_bytes, update_after_digest):
        #: The size of the resulting hash in bytes.
        self.digest_size = digest_bytes

        self._update_after_digest = update_after_digest
        self._digest_done = False

        state = VoidPointer()
        result = _raw_keccak_lib.keccak_init(state.address_of(),
                                             c_size_t(self.digest_size * 2),
                                             0x01)
        if result:
            raise ValueError("Error %d while instantiating keccak" % result)
        self._state = SmartPointer(state.get(),
                                   _raw_keccak_lib.keccak_destroy)
        if data:
            self.update(data)

def init_p256():
    p = 0xffffffff00000001000000000000000000000000ffffffffffffffffffffffff
    b = 0x5ac635d8aa3a93e7b3ebbd55769886bc651d06b0cc53b0f63bce3c3e27d2604b
    order = 0xffffffff00000000ffffffffffffffffbce6faada7179e84f3b9cac2fc632551
    Gx = 0x6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296
    Gy = 0x4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5

    p256_modulus = long_to_bytes(p, 32)
    p256_b = long_to_bytes(b, 32)
    p256_order = long_to_bytes(order, 32)

    ec_p256_context = VoidPointer()
    result = _ec_lib.ec_ws_new_context(ec_p256_context.address_of(),
                                       c_uint8_ptr(p256_modulus),
                                       c_uint8_ptr(p256_b),
                                       c_uint8_ptr(p256_order),
                                       c_size_t(len(p256_modulus)),
                                       c_ulonglong(getrandbits(64))
                                       )
    if result:
        raise ImportError("Error %d initializing P-256 context" % result)

    context = SmartPointer(ec_p256_context.get(), _ec_lib.ec_free_context)
    p256 = _Curve(Integer(p),
                  Integer(b),
                  Integer(order),
                  Integer(Gx),
                  Integer(Gy),
                  None,
                  256,
                  "1.2.840.10045.3.1.7",    # ANSI X9.62
                  context,
                  "NIST P-256",
                  "ecdsa-sha2-nistp256")
    global p256_names
    _curves.update(dict.fromkeys(p256_names, p256))

def init_p521():
    p = 0x000001ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
    b = 0x00000051953eb9618e1c9a1f929a21a0b68540eea2da725b99b315f3b8b489918ef109e156193951ec7e937b1652c0bd3bb1bf073573df883d2c34f1ef451fd46b503f00
    order = 0x000001fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffa51868783bf2f966b7fcc0148f709a5d03bb5c9b8899c47aebb6fb71e91386409
    Gx = 0x000000c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66
    Gy = 0x0000011839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650

    p521_modulus = long_to_bytes(p, 66)
    p521_b = long_to_bytes(b, 66)
    p521_order = long_to_bytes(order, 66)

    ec_p521_context = VoidPointer()
    result = _ec_lib.ec_ws_new_context(ec_p521_context.address_of(),
                                       c_uint8_ptr(p521_modulus),
                                       c_uint8_ptr(p521_b),
                                       c_uint8_ptr(p521_order),
                                       c_size_t(len(p521_modulus)),
                                       c_ulonglong(getrandbits(64))
                                       )
    if result:
        raise ImportError("Error %d initializing P-521 context" % result)

    context = SmartPointer(ec_p521_context.get(), _ec_lib.ec_free_context)
    p521 = _Curve(Integer(p),
                  Integer(b),
                  Integer(order),
                  Integer(Gx),
                  Integer(Gy),
                  None,
                  521,
                  "1.3.132.0.35",   # SEC 2
                  context,
                  "NIST P-521",
                  "ecdsa-sha2-nistp521")
    global p521_names
    _curves.update(dict.fromkeys(p521_names, p521))

def init_p384():
    p = 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffeffffffff0000000000000000ffffffff
    b = 0xb3312fa7e23ee7e4988e056be3f82d19181d9c6efe8141120314088f5013875ac656398d8a2ed19d2a85c8edd3ec2aef
    order = 0xffffffffffffffffffffffffffffffffffffffffffffffffc7634d81f4372ddf581a0db248b0a77aecec196accc52973
    Gx = 0xaa87ca22be8b05378eb1c71ef320ad746e1d3b628ba79b9859f741e082542a385502f25dbf55296c3a545e3872760aB7
    Gy = 0x3617de4a96262c6f5d9e98bf9292dc29f8f41dbd289a147ce9da3113b5f0b8c00a60b1ce1d7e819d7a431d7c90ea0e5F

    p384_modulus = long_to_bytes(p, 48)
    p384_b = long_to_bytes(b, 48)
    p384_order = long_to_bytes(order, 48)

    ec_p384_context = VoidPointer()
    result = _ec_lib.ec_ws_new_context(ec_p384_context.address_of(),
                                       c_uint8_ptr(p384_modulus),
                                       c_uint8_ptr(p384_b),
                                       c_uint8_ptr(p384_order),
                                       c_size_t(len(p384_modulus)),
                                       c_ulonglong(getrandbits(64))
                                       )
    if result:
        raise ImportError("Error %d initializing P-384 context" % result)

    context = SmartPointer(ec_p384_context.get(), _ec_lib.ec_free_context)
    p384 = _Curve(Integer(p),
                  Integer(b),
                  Integer(order),
                  Integer(Gx),
                  Integer(Gy),
                  None,
                  384,
                  "1.3.132.0.34",   # SEC 2
                  context,
                  "NIST P-384",
                  "ecdsa-sha2-nistp384")
    global p384_names
    _curves.update(dict.fromkeys(p384_names, p384))

def _create_base_cipher(dict_parameters):
    """This method instantiates and returns a smart pointer to
    a low-level base cipher. It will absorb named parameters in
    the process."""

    try:
        key = dict_parameters.pop("key")
    except KeyError:
        raise TypeError("Missing 'key' parameter")

    if len(key) not in key_size:
        raise ValueError("Incorrect Blowfish key length (%d bytes)" % len(key))

    start_operation = _raw_blowfish_lib.Blowfish_start_operation
    stop_operation = _raw_blowfish_lib.Blowfish_stop_operation

    void_p = VoidPointer()
    result = start_operation(c_uint8_ptr(key),
                             c_size_t(len(key)),
                             void_p.address_of())
    if result:
        raise ValueError("Error %X while instantiating the Blowfish cipher"
                         % result)
    return SmartPointer(void_p.get(), stop_operation)