def test_equals(self):
print("\nTEST: hash.equals")
a = '\xb5\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x89'
b = '\xb5\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x89'
self.assertTrue(_hash.equals(a, b))
b = '\xb4\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x89'
self.assertFalse(_hash.equals(a, b))
b = '\xb5\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x90'
self.assertFalse(_hash.equals(a, b))
b = '\xb4\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02'
self.assertFalse(_hash.equals(a, b))
def test_equals(self):
print("\nTEST: hash.equals")
a = '\xb5\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x89'
b = '\xb5\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x89'
self.assertTrue(_hash.equals(a, b))
b = '\xb4\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x89'
self.assertFalse(_hash.equals(a, b))
b = '\xb5\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02\x90'
self.assertFalse(_hash.equals(a, b))
b = '\xb4\x85/\xe80\xfa\x04\xdf\x07\x83\x17P\x9dw\x02'
self.assertFalse(_hash.equals(a, b))
def decrypt(self, data, ciphername='aes-256-cbc'):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:])
i += i2
ciphertext = data[i:len(data) - 32]
i += len(ciphertext)
mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
if not equals(hmac_sha256(key_m, data[:len(data) - 32]), mac):
raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername)
return ctx.ciphering(ciphertext)
def decrypt(self, data, ciphername='aes-256-cbc'):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:])
i += i2
ciphertext = data[i:len(data)-32]
i += len(ciphertext)
mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
if not equals(hmac_sha256(key_m, data[:len(data) - 32]), mac):
raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername)
return ctx.ciphering(ciphertext)