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)
if len(key) not in key_size:
raise ValueError("Incorrect ARC2 key length (%d bytes)" % len(key))
if not (40 < effective_keylen <= 1024):
raise ValueError("'effective_key_len' must be no larger than 1024 "
"(not %d)" % effective_keylen)
start_operation = _raw_arc2_lib.ARC2_start_operation
stop_operation = _raw_arc2_lib.ARC2_stop_operation
cipher = VoidPointer()
result = start_operation(c_uint8_ptr(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 _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, 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 __init__(self, data=None):
state = VoidPointer()
result = _raw_md2_lib.md2_init(state.address_of())
if result:
raise ValueError("Error %d while instantiating MD2" % result)
self._state = SmartPointer(state.get(), _raw_md2_lib.md2_destroy)
if data:
self.update(data)
def __init__(self, data=None):
state = VoidPointer()
result = _raw_keccak_lib.keccak_init(state.address_of(), c_size_t(32),
0x1F)
if result:
raise ValueError("Error %d while instantiating SHAKE128" % result)
self._state = SmartPointer(state.get(), _raw_keccak_lib.keccak_destroy)
self._is_squeezing = False
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-3/256" % 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 _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_in = dict_parameters.pop("key")
except KeyError:
raise TypeError("Missing 'key' parameter")
key = adjust_key_parity(bstr(key_in))
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 _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)
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 (16, 20, 28, 32) and not key:
self.oid = "1.3.6.1.4.1.1722.12.2.2." + str(digest_bytes)
state = VoidPointer()
result = _raw_blake2s_lib.blake2s_init(state.address_of(),
c_uint8_ptr(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 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 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))