cis-kuldeep/PyBitmessage-2021-04-27
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OpenSSL improve memory handling

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- replace void * with BIGNUM * where applicable
- fixes #1622
- replace 0 with None when using a NULL pointer as parameter
- maybe needs more work in how the data is accessed
- EC_POINT struct is now defined but isn't used yet
This commit is contained in:
Peter Šurda 2021-01-03 18:23:00 +01:00
parent 574b60ed0e
commit 3e85e9d60e
Signed by untrusted user: PeterSurda
GPG Key ID: 0C5F50C0B5F37D87
5 changed files with 153 additions and 113 deletions
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50
src/pyelliptic/ecc.py
View File

@ -82,7 +82,6 @@ class ECC(object):
self.pubkey_y = None self.pubkey_y = None
self.privkey = None self.privkey = None
raise Exception("Bad ECC keys ...") raise Exception("Bad ECC keys ...")
else:
self.pubkey_x = pubkey_x self.pubkey_x = pubkey_x
self.pubkey_y = pubkey_y self.pubkey_y = pubkey_y
self.privkey = privkey self.privkey = privkey
@ -211,8 +210,8 @@ class ECC(object):
if other_key == 0: if other_key == 0:
raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...") raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...")
other_pub_key_x = OpenSSL.BN_bin2bn(pubkey_x, len(pubkey_x), 0) other_pub_key_x = OpenSSL.BN_bin2bn(pubkey_x, len(pubkey_x), None)
other_pub_key_y = OpenSSL.BN_bin2bn(pubkey_y, len(pubkey_y), 0) other_pub_key_y = OpenSSL.BN_bin2bn(pubkey_y, len(pubkey_y), None)
other_group = OpenSSL.EC_KEY_get0_group(other_key) other_group = OpenSSL.EC_KEY_get0_group(other_key)
other_pub_key = OpenSSL.EC_POINT_new(other_group) other_pub_key = OpenSSL.EC_POINT_new(other_group)
@ -233,7 +232,7 @@ class ECC(object):
if own_key == 0: if own_key == 0:
raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...") raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...")
own_priv_key = OpenSSL.BN_bin2bn( own_priv_key = OpenSSL.BN_bin2bn(
self.privkey, len(self.privkey), 0) self.privkey, len(self.privkey), None)
if (OpenSSL.EC_KEY_set_private_key(own_key, own_priv_key)) == 0: if (OpenSSL.EC_KEY_set_private_key(own_key, own_priv_key)) == 0:
raise Exception("[OpenSSL] EC_KEY_set_private_key FAIL ...") raise Exception("[OpenSSL] EC_KEY_set_private_key FAIL ...")
@ -279,16 +278,14 @@ class ECC(object):
curve = self.curve curve = self.curve
elif isinstance(curve, str): elif isinstance(curve, str):
curve = OpenSSL.get_curve(curve) curve = OpenSSL.get_curve(curve)
else:
curve = curve
try: try:
key = OpenSSL.EC_KEY_new_by_curve_name(curve) key = OpenSSL.EC_KEY_new_by_curve_name(curve)
if key == 0: if key == 0:
raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...") raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...")
if privkey is not None: if privkey is not None:
priv_key = OpenSSL.BN_bin2bn(privkey, len(privkey), 0) priv_key = OpenSSL.BN_bin2bn(privkey, len(privkey), None)
pub_key_x = OpenSSL.BN_bin2bn(pubkey_x, len(pubkey_x), 0) pub_key_x = OpenSSL.BN_bin2bn(pubkey_x, len(pubkey_x), None)
pub_key_y = OpenSSL.BN_bin2bn(pubkey_y, len(pubkey_y), 0) pub_key_y = OpenSSL.BN_bin2bn(pubkey_y, len(pubkey_y), None)
if privkey is not None: if privkey is not None:
if (OpenSSL.EC_KEY_set_private_key(key, priv_key)) == 0: if (OpenSSL.EC_KEY_set_private_key(key, priv_key)) == 0:
@ -338,9 +335,11 @@ class ECC(object):
if key == 0: if key == 0:
raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...") raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...")
priv_key = OpenSSL.BN_bin2bn(self.privkey, len(self.privkey), 0) priv_key = OpenSSL.BN_bin2bn(self.privkey, len(self.privkey), None)
pub_key_x = OpenSSL.BN_bin2bn(self.pubkey_x, len(self.pubkey_x), 0) pub_key_x = OpenSSL.BN_bin2bn(self.pubkey_x, len(self.pubkey_x),
pub_key_y = OpenSSL.BN_bin2bn(self.pubkey_y, len(self.pubkey_y), 0) None)
pub_key_y = OpenSSL.BN_bin2bn(self.pubkey_y, len(self.pubkey_y),
None)
if (OpenSSL.EC_KEY_set_private_key(key, priv_key)) == 0: if (OpenSSL.EC_KEY_set_private_key(key, priv_key)) == 0:
raise Exception("[OpenSSL] EC_KEY_set_private_key FAIL ...") raise Exception("[OpenSSL] EC_KEY_set_private_key FAIL ...")
@ -405,8 +404,10 @@ class ECC(object):
if key == 0: if key == 0:
raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...") raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...")
pub_key_x = OpenSSL.BN_bin2bn(self.pubkey_x, len(self.pubkey_x), 0) pub_key_x = OpenSSL.BN_bin2bn(self.pubkey_x, len(self.pubkey_x),
pub_key_y = OpenSSL.BN_bin2bn(self.pubkey_y, len(self.pubkey_y), 0) None)
pub_key_y = OpenSSL.BN_bin2bn(self.pubkey_y, len(self.pubkey_y),
None)
group = OpenSSL.EC_KEY_get0_group(key) group = OpenSSL.EC_KEY_get0_group(key)
pub_key = OpenSSL.EC_POINT_new(group) pub_key = OpenSSL.EC_POINT_new(group)
@ -477,9 +478,9 @@ class ECC(object):
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest() key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:] key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey() pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize()) _iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername) ctx = Cipher(key_e, _iv, 1, ciphername)
ciphertext = iv + pubkey + ctx.ciphering(data) ciphertext = _iv + pubkey + ctx.ciphering(data)
mac = hmac_sha256(key_m, ciphertext) mac = hmac_sha256(key_m, ciphertext)
return ciphertext + mac return ciphertext + mac
@ -488,16 +489,21 @@ class ECC(object):
Decrypt data with ECIES method using the local private key Decrypt data with ECIES method using the local private key
""" """
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize() blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize] _iv = data[:blocksize]
i = blocksize i = blocksize
_, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:]) _, pubkey_x, pubkey_y, _i2 = ECC._decode_pubkey(data[i:])
i += i2 i += _i2
ciphertext = data[i:len(data) - 32] ciphertext = data[i:len(data) - 32]
i += len(ciphertext) i += len(ciphertext)
mac = data[i:] mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest() key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:] key_e, key_m = key[:32], key[32:]
if not equals(hmac_sha256(key_m, data[:len(data) - 32]), mac): if not equals(hmac_sha256(key_m, data[:len(data) - 32]), mac):
print "b1"
raise RuntimeError("Fail to verify data") raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername) print "b2"
return ctx.ciphering(ciphertext) ctx = Cipher(key_e, _iv, 0, ciphername)
print "c"
retval = ctx.ciphering(ciphertext)
print "d"
return retval

29
src/pyelliptic/eccblind.py
View File

@ -110,7 +110,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
""" """
ECC inversion ECC inversion
""" """
inverse = OpenSSL.BN_mod_inverse(0, a, self.n, self.ctx) inverse = OpenSSL.BN_mod_inverse(None, a, self.n, self.ctx)
return inverse return inverse
def ec_gen_keypair(self): def ec_gen_keypair(self):
@ -120,7 +120,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
""" """
d = self.ec_get_random() d = self.ec_get_random()
Q = OpenSSL.EC_POINT_new(self.group) Q = OpenSSL.EC_POINT_new(self.group)
OpenSSL.EC_POINT_mul(self.group, Q, d, 0, 0, 0) OpenSSL.EC_POINT_mul(self.group, Q, d, None, None, None)
return (d, Q) return (d, Q)
def ec_Ftor(self, F): def ec_Ftor(self, F):
@ -140,7 +140,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
x = OpenSSL.BN_new() x = OpenSSL.BN_new()
y = OpenSSL.BN_new() y = OpenSSL.BN_new()
OpenSSL.EC_POINT_get_affine_coordinates( OpenSSL.EC_POINT_get_affine_coordinates(
self.group, point, x, y, 0) self.group, point, x, y, None)
y_byte = (OpenSSL.BN_is_odd(y) & Y_BIT) | COMPRESSED_BIT y_byte = (OpenSSL.BN_is_odd(y) & Y_BIT) | COMPRESSED_BIT
l_ = OpenSSL.BN_num_bytes(self.n) l_ = OpenSSL.BN_num_bytes(self.n)
try: try:
@ -161,7 +161,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
def _ec_point_deserialize(self, data): def _ec_point_deserialize(self, data):
"""Make a string into an EC point""" """Make a string into an EC point"""
y_bit, x_raw = unpack(EC, data) y_bit, x_raw = unpack(EC, data)
x = OpenSSL.BN_bin2bn(x_raw, OpenSSL.BN_num_bytes(self.n), 0) x = OpenSSL.BN_bin2bn(x_raw, OpenSSL.BN_num_bytes(self.n), None)
y_bit &= Y_BIT y_bit &= Y_BIT
retval = OpenSSL.EC_POINT_new(self.group) retval = OpenSSL.EC_POINT_new(self.group)
OpenSSL.EC_POINT_set_compressed_coordinates(self.group, OpenSSL.EC_POINT_set_compressed_coordinates(self.group,
@ -185,7 +185,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
def _bn_deserialize(self, data): def _bn_deserialize(self, data):
"""Make a BigNum out of string""" """Make a BigNum out of string"""
x = OpenSSL.BN_bin2bn(data, OpenSSL.BN_num_bytes(self.n), 0) x = OpenSSL.BN_bin2bn(data, OpenSSL.BN_num_bytes(self.n), None)
return x return x
def _init_privkey(self, privkey): def _init_privkey(self, privkey):
@ -262,7 +262,7 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
# R = kG # R = kG
self.R = OpenSSL.EC_POINT_new(self.group) self.R = OpenSSL.EC_POINT_new(self.group)
OpenSSL.EC_POINT_mul(self.group, self.R, self.k, 0, 0, 0) OpenSSL.EC_POINT_mul(self.group, self.R, self.k, None, None, None)
return self._ec_point_serialize(self.R) return self._ec_point_serialize(self.R)
@ -287,17 +287,18 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
# F = b^-1 * R... # F = b^-1 * R...
self.binv = self.ec_invert(self.b) self.binv = self.ec_invert(self.b)
OpenSSL.EC_POINT_mul(self.group, temp, 0, self.R, self.binv, 0) OpenSSL.EC_POINT_mul(self.group, temp, None, self.R, self.binv,
None)
OpenSSL.EC_POINT_copy(self.F, temp) OpenSSL.EC_POINT_copy(self.F, temp)
# ... + a*b^-1 * Q... # ... + a*b^-1 * Q...
OpenSSL.BN_mul(abinv, self.a, self.binv, self.ctx) OpenSSL.BN_mul(abinv, self.a, self.binv, self.ctx)
OpenSSL.EC_POINT_mul(self.group, temp, 0, self.Q, abinv, 0) OpenSSL.EC_POINT_mul(self.group, temp, None, self.Q, abinv, None)
OpenSSL.EC_POINT_add(self.group, self.F, self.F, temp, 0) OpenSSL.EC_POINT_add(self.group, self.F, self.F, temp, None)
# ... + c*G # ... + c*G
OpenSSL.EC_POINT_mul(self.group, temp, 0, self.G, self.c, 0) OpenSSL.EC_POINT_mul(self.group, temp, None, self.G, self.c, None)
OpenSSL.EC_POINT_add(self.group, self.F, self.F, temp, 0) OpenSSL.EC_POINT_add(self.group, self.F, self.F, temp, None)
# F = (x0, y0) # F = (x0, y0)
self.r = self.ec_Ftor(self.F) self.r = self.ec_Ftor(self.F)
@ -356,10 +357,10 @@ class ECCBlind(object): # pylint: disable=too-many-instance-attributes
lhs = OpenSSL.EC_POINT_new(self.group) lhs = OpenSSL.EC_POINT_new(self.group)
rhs = OpenSSL.EC_POINT_new(self.group) rhs = OpenSSL.EC_POINT_new(self.group)
OpenSSL.EC_POINT_mul(self.group, lhs, s, 0, 0, 0) OpenSSL.EC_POINT_mul(self.group, lhs, s, None, None, None)
OpenSSL.EC_POINT_mul(self.group, rhs, 0, self.Q, self.m, 0) OpenSSL.EC_POINT_mul(self.group, rhs, None, self.Q, self.m, None)
OpenSSL.EC_POINT_mul(self.group, rhs, 0, rhs, self.r, 0) OpenSSL.EC_POINT_mul(self.group, rhs, None, rhs, self.r, None)
OpenSSL.EC_POINT_add(self.group, rhs, rhs, self.F, self.ctx) OpenSSL.EC_POINT_add(self.group, rhs, rhs, self.F, self.ctx)
retval = OpenSSL.EC_POINT_cmp(self.group, lhs, rhs, self.ctx) retval = OpenSSL.EC_POINT_cmp(self.group, lhs, rhs, self.ctx)

8
src/pyelliptic/hash.py
View File

@ -41,7 +41,13 @@ def hmac_sha256(k, m):
d = OpenSSL.malloc(m, len(m)) d = OpenSSL.malloc(m, len(m))
md = OpenSSL.malloc(0, 32) md = OpenSSL.malloc(0, 32)
i = OpenSSL.pointer(OpenSSL.c_int(0)) i = OpenSSL.pointer(OpenSSL.c_int(0))
print("calculating")
try:
OpenSSL.HMAC(OpenSSL.EVP_sha256(), key, len(k), d, len(m), md, i) OpenSSL.HMAC(OpenSSL.EVP_sha256(), key, len(k), d, len(m), md, i)
except Exception as e:
print(e)
raise e
# print(i.contents)
return md.raw return md.raw
@ -53,7 +59,9 @@ def hmac_sha512(k, m):
d = OpenSSL.malloc(m, len(m)) d = OpenSSL.malloc(m, len(m))
md = OpenSSL.malloc(0, 64) md = OpenSSL.malloc(0, 64)
i = OpenSSL.pointer(OpenSSL.c_int(0)) i = OpenSSL.pointer(OpenSSL.c_int(0))
print("calculating")
OpenSSL.HMAC(OpenSSL.EVP_sha512(), key, len(k), d, len(m), md, i) OpenSSL.HMAC(OpenSSL.EVP_sha512(), key, len(k), d, len(m), md, i)
print(i.contents)
return md.raw return md.raw

167
src/pyelliptic/openssl.py
View File

@ -72,6 +72,29 @@ def get_version(library):
return (version, hexversion, cflags) return (version, hexversion, cflags)
class BIGNUM(ctypes.Structure): # pylint: disable=too-few-public-methods
"""OpenSSL's BIGNUM struct"""
_fields_ = [
('d', ctypes.POINTER(ctypes.c_ulong)),
('top', ctypes.c_int),
('dmax', ctypes.c_int),
('neg', ctypes.c_int),
('flags', ctypes.c_int),
]
class EC_POINT(ctypes.Structure): # pylint: disable=too-few-public-methods
"""OpenSSL's EC_POINT struct"""
_fields_ = [
('meth', ctypes.c_void_p),
('curve_name', ctypes.c_int),
('X', ctypes.POINTER(BIGNUM)),
('Y', ctypes.POINTER(BIGNUM)),
('Z', ctypes.POINTER(BIGNUM)),
('Z_is_one', ctypes.c_int),
]
class _OpenSSL(object): class _OpenSSL(object):
""" """
Wrapper for OpenSSL using ctypes Wrapper for OpenSSL using ctypes
@ -91,38 +114,38 @@ class _OpenSSL(object):
self.create_string_buffer = ctypes.create_string_buffer self.create_string_buffer = ctypes.create_string_buffer
self.BN_new = self._lib.BN_new self.BN_new = self._lib.BN_new
self.BN_new.restype = ctypes.c_void_p self.BN_new.restype = ctypes.POINTER(BIGNUM)
self.BN_new.argtypes = [] self.BN_new.argtypes = []
self.BN_free = self._lib.BN_free self.BN_free = self._lib.BN_free
self.BN_free.restype = None self.BN_free.restype = None
self.BN_free.argtypes = [ctypes.c_void_p] self.BN_free.argtypes = [ctypes.POINTER(BIGNUM)]
self.BN_clear_free = self._lib.BN_clear_free self.BN_clear_free = self._lib.BN_clear_free
self.BN_clear_free.restype = None self.BN_clear_free.restype = None
self.BN_clear_free.argtypes = [ctypes.c_void_p] self.BN_clear_free.argtypes = [ctypes.POINTER(BIGNUM)]
self.BN_num_bits = self._lib.BN_num_bits self.BN_num_bits = self._lib.BN_num_bits
self.BN_num_bits.restype = ctypes.c_int self.BN_num_bits.restype = ctypes.c_int
self.BN_num_bits.argtypes = [ctypes.c_void_p] self.BN_num_bits.argtypes = [ctypes.POINTER(BIGNUM)]
self.BN_bn2bin = self._lib.BN_bn2bin self.BN_bn2bin = self._lib.BN_bn2bin
self.BN_bn2bin.restype = ctypes.c_int self.BN_bn2bin.restype = ctypes.c_int
self.BN_bn2bin.argtypes = [ctypes.c_void_p, ctypes.c_void_p] self.BN_bn2bin.argtypes = [ctypes.POINTER(BIGNUM), ctypes.c_void_p]
try: try:
self.BN_bn2binpad = self._lib.BN_bn2binpad self.BN_bn2binpad = self._lib.BN_bn2binpad
self.BN_bn2binpad.restype = ctypes.c_int self.BN_bn2binpad.restype = ctypes.c_int
self.BN_bn2binpad.argtypes = [ctypes.c_void_p, ctypes.c_void_p, self.BN_bn2binpad.argtypes = [ctypes.POINTER(BIGNUM), ctypes.c_void_p,
ctypes.c_int] ctypes.c_int]
except AttributeError: except AttributeError:
# optional, we have a workaround # optional, we have a workaround
pass pass
self.BN_bin2bn = self._lib.BN_bin2bn self.BN_bin2bn = self._lib.BN_bin2bn
self.BN_bin2bn.restype = ctypes.c_void_p self.BN_bin2bn.restype = ctypes.POINTER(BIGNUM)
self.BN_bin2bn.argtypes = [ctypes.c_void_p, ctypes.c_int, self.BN_bin2bn.argtypes = [ctypes.c_void_p, ctypes.c_int,
ctypes.c_void_p] ctypes.POINTER(BIGNUM)]
self.EC_KEY_free = self._lib.EC_KEY_free self.EC_KEY_free = self._lib.EC_KEY_free
self.EC_KEY_free.restype = None self.EC_KEY_free.restype = None
@ -156,9 +179,9 @@ class _OpenSSL(object):
self._lib.EC_POINT_get_affine_coordinates_GFp self._lib.EC_POINT_get_affine_coordinates_GFp
self.EC_POINT_get_affine_coordinates_GFp.restype = ctypes.c_int self.EC_POINT_get_affine_coordinates_GFp.restype = ctypes.c_int
self.EC_POINT_get_affine_coordinates_GFp.argtypes = [ctypes.c_void_p, self.EC_POINT_get_affine_coordinates_GFp.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
try: try:
@ -170,20 +193,20 @@ class _OpenSSL(object):
self._lib.EC_POINT_get_affine_coordinates_GF2m self._lib.EC_POINT_get_affine_coordinates_GF2m
self.EC_POINT_get_affine_coordinates.restype = ctypes.c_int self.EC_POINT_get_affine_coordinates.restype = ctypes.c_int
self.EC_POINT_get_affine_coordinates.argtypes = [ctypes.c_void_p, self.EC_POINT_get_affine_coordinates.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.EC_KEY_set_private_key = self._lib.EC_KEY_set_private_key self.EC_KEY_set_private_key = self._lib.EC_KEY_set_private_key
self.EC_KEY_set_private_key.restype = ctypes.c_int self.EC_KEY_set_private_key.restype = ctypes.c_int
self.EC_KEY_set_private_key.argtypes = [ctypes.c_void_p, self.EC_KEY_set_private_key.argtypes = [ctypes.c_void_p,
ctypes.c_void_p] ctypes.POINTER(BIGNUM)]
self.EC_KEY_set_public_key = self._lib.EC_KEY_set_public_key self.EC_KEY_set_public_key = self._lib.EC_KEY_set_public_key
self.EC_KEY_set_public_key.restype = ctypes.c_int self.EC_KEY_set_public_key.restype = ctypes.c_int
self.EC_KEY_set_public_key.argtypes = [ctypes.c_void_p, self.EC_KEY_set_public_key.argtypes = [ctypes.c_void_p,
ctypes.c_void_p] ctypes.POINTER(EC_POINT)]
self.EC_KEY_set_group = self._lib.EC_KEY_set_group self.EC_KEY_set_group = self._lib.EC_KEY_set_group
self.EC_KEY_set_group.restype = ctypes.c_int self.EC_KEY_set_group.restype = ctypes.c_int
@ -194,9 +217,9 @@ class _OpenSSL(object):
self._lib.EC_POINT_set_affine_coordinates_GFp self._lib.EC_POINT_set_affine_coordinates_GFp
self.EC_POINT_set_affine_coordinates_GFp.restype = ctypes.c_int self.EC_POINT_set_affine_coordinates_GFp.restype = ctypes.c_int
self.EC_POINT_set_affine_coordinates_GFp.argtypes = [ctypes.c_void_p, self.EC_POINT_set_affine_coordinates_GFp.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
try: try:
@ -208,9 +231,9 @@ class _OpenSSL(object):
self._lib.EC_POINT_set_affine_coordinates_GF2m self._lib.EC_POINT_set_affine_coordinates_GF2m
self.EC_POINT_set_affine_coordinates.restype = ctypes.c_int self.EC_POINT_set_affine_coordinates.restype = ctypes.c_int
self.EC_POINT_set_affine_coordinates.argtypes = [ctypes.c_void_p, self.EC_POINT_set_affine_coordinates.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
try: try:
@ -219,38 +242,39 @@ class _OpenSSL(object):
except AttributeError: except AttributeError:
# OpenSSL docs say only use this for backwards compatibility # OpenSSL docs say only use this for backwards compatibility
self.EC_POINT_set_compressed_coordinates = \ self.EC_POINT_set_compressed_coordinates = \
self._lib.EC_POINT_set_compressed_coordinates_GF2m self._lib.EC_POINT_set_compressed_coordinates_GFp
self.EC_POINT_set_compressed_coordinates.restype = ctypes.c_int self.EC_POINT_set_compressed_coordinates.restype = ctypes.c_int
self.EC_POINT_set_compressed_coordinates.argtypes = [ctypes.c_void_p, self.EC_POINT_set_compressed_coordinates.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_int, ctypes.c_int,
ctypes.c_void_p] ctypes.c_void_p]
self.EC_POINT_new = self._lib.EC_POINT_new self.EC_POINT_new = self._lib.EC_POINT_new
self.EC_POINT_new.restype = ctypes.c_void_p self.EC_POINT_new.restype = ctypes.POINTER(EC_POINT)
self.EC_POINT_new.argtypes = [ctypes.c_void_p] self.EC_POINT_new.argtypes = [ctypes.c_void_p]
self.EC_POINT_free = self._lib.EC_POINT_free self.EC_POINT_free = self._lib.EC_POINT_free
self.EC_POINT_free.restype = None self.EC_POINT_free.restype = None
self.EC_POINT_free.argtypes = [ctypes.c_void_p] self.EC_POINT_free.argtypes = [ctypes.POINTER(EC_POINT)]
self.BN_CTX_free = self._lib.BN_CTX_free self.BN_CTX_free = self._lib.BN_CTX_free
self.BN_CTX_free.restype = None self.BN_CTX_free.restype = None
self.BN_CTX_free.argtypes = [ctypes.c_void_p] self.BN_CTX_free.argtypes = [ctypes.c_void_p]
self.EC_POINT_mul = self._lib.EC_POINT_mul self.EC_POINT_mul = self._lib.EC_POINT_mul
self.EC_POINT_mul.restype = None self.EC_POINT_mul.restype = ctypes.c_int
self.EC_POINT_mul.argtypes = [ctypes.c_void_p, self.EC_POINT_mul.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.EC_KEY_set_private_key = self._lib.EC_KEY_set_private_key self.EC_KEY_set_private_key = self._lib.EC_KEY_set_private_key
self.EC_KEY_set_private_key.restype = ctypes.c_int self.EC_KEY_set_private_key.restype = ctypes.c_int
self.EC_KEY_set_private_key.argtypes = [ctypes.c_void_p, self.EC_KEY_set_private_key.argtypes = [ctypes.c_void_p,
ctypes.c_void_p] ctypes.POINTER(BIGNUM)]
if self._hexversion >= 0x10100000 and not self._libreSSL: if self._hexversion >= 0x10100000 and not self._libreSSL:
self.EC_KEY_OpenSSL = self._lib.EC_KEY_OpenSSL self.EC_KEY_OpenSSL = self._lib.EC_KEY_OpenSSL
@ -469,70 +493,71 @@ class _OpenSSL(object):
self.BN_CTX_new.argtypes = [] self.BN_CTX_new.argtypes = []
self.BN_dup = self._lib.BN_dup self.BN_dup = self._lib.BN_dup
self.BN_dup.restype = ctypes.c_void_p self.BN_dup.restype = ctypes.POINTER(BIGNUM)
self.BN_dup.argtypes = [ctypes.c_void_p] self.BN_dup.argtypes = [ctypes.POINTER(BIGNUM)]
self.BN_rand = self._lib.BN_rand self.BN_rand = self._lib.BN_rand
self.BN_rand.restype = ctypes.c_int self.BN_rand.restype = ctypes.c_int
self.BN_rand.argtypes = [ctypes.c_void_p, self.BN_rand.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_int,
ctypes.c_int, ctypes.c_int,
ctypes.c_int] ctypes.c_int]
self.BN_set_word = self._lib.BN_set_word self.BN_set_word = self._lib.BN_set_word
self.BN_set_word.restype = ctypes.c_int self.BN_set_word.restype = ctypes.c_int
self.BN_set_word.argtypes = [ctypes.c_void_p, self.BN_set_word.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_ulong] ctypes.c_ulong]
self.BN_mul = self._lib.BN_mul self.BN_mul = self._lib.BN_mul
self.BN_mul.restype = ctypes.c_int self.BN_mul.restype = ctypes.c_int
self.BN_mul.argtypes = [ctypes.c_void_p, self.BN_mul.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.BN_mod_add = self._lib.BN_mod_add self.BN_mod_add = self._lib.BN_mod_add
self.BN_mod_add.restype = ctypes.c_int self.BN_mod_add.restype = ctypes.c_int
self.BN_mod_add.argtypes = [ctypes.c_void_p, self.BN_mod_add.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.BN_mod_inverse = self._lib.BN_mod_inverse self.BN_mod_inverse = self._lib.BN_mod_inverse
self.BN_mod_inverse.restype = ctypes.c_void_p self.BN_mod_inverse.restype = ctypes.POINTER(BIGNUM)
self.BN_mod_inverse.argtypes = [ctypes.c_void_p, self.BN_mod_inverse.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.BN_mod_mul = self._lib.BN_mod_mul self.BN_mod_mul = self._lib.BN_mod_mul
self.BN_mod_mul.restype = ctypes.c_int self.BN_mod_mul.restype = ctypes.c_int
self.BN_mod_mul.argtypes = [ctypes.c_void_p, self.BN_mod_mul.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.BN_lshift = self._lib.BN_lshift self.BN_lshift = self._lib.BN_lshift
self.BN_lshift.restype = ctypes.c_int self.BN_lshift.restype = ctypes.c_int
self.BN_lshift.argtypes = [ctypes.c_void_p, self.BN_lshift.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_int] ctypes.c_int]
self.BN_sub_word = self._lib.BN_sub_word self.BN_sub_word = self._lib.BN_sub_word
self.BN_sub_word.restype = ctypes.c_int self.BN_sub_word.restype = ctypes.c_int
self.BN_sub_word.argtypes = [ctypes.c_void_p, self.BN_sub_word.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_ulong] ctypes.c_ulong]
self.BN_cmp = self._lib.BN_cmp self.BN_cmp = self._lib.BN_cmp
self.BN_cmp.restype = ctypes.c_int self.BN_cmp.restype = ctypes.c_int
self.BN_cmp.argtypes = [ctypes.c_void_p, self.BN_cmp.argtypes = [ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.POINTER(BIGNUM)]
try: try:
self.BN_is_odd = self._lib.BN_is_odd self.BN_is_odd = self._lib.BN_is_odd
self.BN_is_odd.restype = ctypes.c_int self.BN_is_odd.restype = ctypes.c_int
self.BN_is_odd.argtypes = [ctypes.c_void_p] self.BN_is_odd.argtypes = [ctypes.POINTER(BIGNUM)]
except AttributeError: except AttributeError:
# OpenSSL 1.1.0 implements this as a function, but earlier # OpenSSL 1.1.0 implements this as a function, but earlier
# versions as macro, so we need to workaround # versions as macro, so we need to workaround
@ -540,7 +565,7 @@ class _OpenSSL(object):
self.BN_bn2dec = self._lib.BN_bn2dec self.BN_bn2dec = self._lib.BN_bn2dec
self.BN_bn2dec.restype = ctypes.c_char_p self.BN_bn2dec.restype = ctypes.c_char_p
self.BN_bn2dec.argtypes = [ctypes.c_void_p] self.BN_bn2dec.argtypes = [ctypes.POINTER(BIGNUM)]
self.EC_GROUP_new_by_curve_name = self._lib.EC_GROUP_new_by_curve_name self.EC_GROUP_new_by_curve_name = self._lib.EC_GROUP_new_by_curve_name
self.EC_GROUP_new_by_curve_name.restype = ctypes.c_void_p self.EC_GROUP_new_by_curve_name.restype = ctypes.c_void_p
@ -549,43 +574,43 @@ class _OpenSSL(object):
self.EC_GROUP_get_order = self._lib.EC_GROUP_get_order self.EC_GROUP_get_order = self._lib.EC_GROUP_get_order
self.EC_GROUP_get_order.restype = ctypes.c_int self.EC_GROUP_get_order.restype = ctypes.c_int
self.EC_GROUP_get_order.argtypes = [ctypes.c_void_p, self.EC_GROUP_get_order.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.EC_GROUP_get_cofactor = self._lib.EC_GROUP_get_cofactor self.EC_GROUP_get_cofactor = self._lib.EC_GROUP_get_cofactor
self.EC_GROUP_get_cofactor.restype = ctypes.c_int self.EC_GROUP_get_cofactor.restype = ctypes.c_int
self.EC_GROUP_get_cofactor.argtypes = [ctypes.c_void_p, self.EC_GROUP_get_cofactor.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(BIGNUM),
ctypes.c_void_p] ctypes.c_void_p]
self.EC_GROUP_get0_generator = self._lib.EC_GROUP_get0_generator self.EC_GROUP_get0_generator = self._lib.EC_GROUP_get0_generator
self.EC_GROUP_get0_generator.restype = ctypes.c_void_p self.EC_GROUP_get0_generator.restype = ctypes.POINTER(EC_POINT)
self.EC_GROUP_get0_generator.argtypes = [ctypes.c_void_p] self.EC_GROUP_get0_generator.argtypes = [ctypes.c_void_p]
self.EC_POINT_copy = self._lib.EC_POINT_copy self.EC_POINT_copy = self._lib.EC_POINT_copy
self.EC_POINT_copy.restype = ctypes.c_int self.EC_POINT_copy.restype = ctypes.c_int
self.EC_POINT_copy.argtypes = [ctypes.c_void_p, self.EC_POINT_copy.argtypes = [ctypes.POINTER(EC_POINT),
ctypes.c_void_p] ctypes.POINTER(EC_POINT)]
self.EC_POINT_add = self._lib.EC_POINT_add self.EC_POINT_add = self._lib.EC_POINT_add
self.EC_POINT_add.restype = ctypes.c_int self.EC_POINT_add.restype = ctypes.c_int
self.EC_POINT_add.argtypes = [ctypes.c_void_p, self.EC_POINT_add.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p] ctypes.c_void_p]
self.EC_POINT_cmp = self._lib.EC_POINT_cmp self.EC_POINT_cmp = self._lib.EC_POINT_cmp
self.EC_POINT_cmp.restype = ctypes.c_int self.EC_POINT_cmp.restype = ctypes.c_int
self.EC_POINT_cmp.argtypes = [ctypes.c_void_p, self.EC_POINT_cmp.argtypes = [ctypes.c_void_p,
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p, ctypes.POINTER(EC_POINT),
ctypes.c_void_p] ctypes.c_void_p]
self.EC_POINT_set_to_infinity = self._lib.EC_POINT_set_to_infinity self.EC_POINT_set_to_infinity = self._lib.EC_POINT_set_to_infinity
self.EC_POINT_set_to_infinity.restype = ctypes.c_int self.EC_POINT_set_to_infinity.restype = ctypes.c_int
self.EC_POINT_set_to_infinity.argtypes = [ctypes.c_void_p, self.EC_POINT_set_to_infinity.argtypes = [ctypes.c_void_p,
ctypes.c_void_p] ctypes.POINTER(EC_POINT)]
self._set_ciphers() self._set_ciphers()
self._set_curves() self._set_curves()
@ -722,9 +747,9 @@ class _OpenSSL(object):
if data != 0: if data != 0:
if sys.version_info.major == 3 and isinstance(data, type('')): if sys.version_info.major == 3 and isinstance(data, type('')):
data = data.encode() data = data.encode()
buffer_ = self.create_string_buffer(data, size) buffer_ = self.create_string_buffer(data, size + 1)
else: else:
buffer_ = self.create_string_buffer(size) buffer_ = self.create_string_buffer(size + 1)
return buffer_ return buffer_

4
src/tests/test_blindsig.py
View File

@ -57,7 +57,7 @@ class TestBlindSig(unittest.TestCase):
x = OpenSSL.BN_new() x = OpenSSL.BN_new()
y = OpenSSL.BN_new() y = OpenSSL.BN_new()
OpenSSL.EC_POINT_get_affine_coordinates( OpenSSL.EC_POINT_get_affine_coordinates(
obj.group, obj.Q, x, y, 0) obj.group, obj.Q, x, y, None)
self.assertEqual(OpenSSL.BN_is_odd(y), self.assertEqual(OpenSSL.BN_is_odd(y),
OpenSSL.BN_is_odd_compatible(y)) OpenSSL.BN_is_odd_compatible(y))
@ -84,7 +84,7 @@ class TestBlindSig(unittest.TestCase):
self.assertEqual(OpenSSL.BN_cmp(y0, y1), 0) self.assertEqual(OpenSSL.BN_cmp(y0, y1), 0)
self.assertEqual(OpenSSL.BN_cmp(x0, x1), 0) self.assertEqual(OpenSSL.BN_cmp(x0, x1), 0)
self.assertEqual(OpenSSL.EC_POINT_cmp(obj.group, randompoint, self.assertEqual(OpenSSL.EC_POINT_cmp(obj.group, randompoint,
secondpoint, 0), 0) secondpoint, None), 0)
finally: finally:
OpenSSL.BN_free(x0) OpenSSL.BN_free(x0)
OpenSSL.BN_free(x1) OpenSSL.BN_free(x1)