def raw_check_key(self, privkey, pubkey_x, pubkey_y, curve=None):
if curve == None: curve = self.curve
elif type(curve) == str: curve = openssl.get_curve(curve)
else: curve = curve
try:
key = openssl.EC_KEY_new_by_curve_name(curve)
if key == 0:
raise Exception("[OpenSSL] EC_KEY_new_by_curve_name FAIL ...")
if privkey != None:
priv_key = openssl.BN_bin2bn(privkey, len(privkey), 0)
pub_key_x = openssl.BN_bin2bn(pubkey_x, len(pubkey_x), 0)
pub_key_y = openssl.BN_bin2bn(pubkey_y, len(pubkey_y), 0)
if privkey != None:
if (openssl.EC_KEY_set_private_key(key, priv_key)) == 0:
raise Exception("[OpenSSL] EC_KEY_set_private_key FAIL ...")
group = openssl.EC_KEY_get0_group(key)
pub_key = openssl.EC_POINT_new(group)
if (openssl.EC_POINT_set_affine_coordinates_GFp(group, pub_key, pub_key_x, pub_key_y, 0)) == 0:
raise Exception("[OpenSSL] EC_POINT_set_affine_coordinates_GFp FAIL ...")
if (openssl.EC_KEY_set_public_key(key, pub_key)) == 0:
raise Exception("[OpenSSL] EC_KEY_set_public_key FAIL ...")
if (openssl.EC_KEY_check_key(key)) == 0:
raise Exception("[OpenSSL] EC_KEY_check_key FAIL ...")
return 0
finally:
openssl.EC_KEY_free(key)
openssl.BN_free(pub_key_x)
openssl.BN_free(pub_key_y)
openssl.EC_POINT_free(pub_key)
if privkey != None: openssl.BN_free(priv_key)
def __init__(self, pubkey = None, privkey = None, pubkey_x = None, pubkey_y = None, raw_privkey = None, curve = 'sect283r1'):
"""
For a normal and High level use, specifie pubkey, privkey (if you need) and the curve
"""
if type(curve) == str:
self.curve = openssl.get_curve(curve)
else: self.curve = curve
if pubkey_x != None and pubkey_y != None:
self._set_keys(pubkey_x, pubkey_y, raw_privkey)
elif pubkey != None:
curve, pubkey_x, pubkey_y, i = ecc._decode_pubkey(pubkey)
if privkey != None:
curve2, raw_privkey, i = ecc._decode_privkey(privkey)
if curve != curve2: raise Exception("Bad ECC keys ...")
self.curve = curve
self._set_keys(pubkey_x, pubkey_y, raw_privkey)
else:
self.privkey, self.pubkey_x, self.pubkey_y = self._generate()