try: import unittest2 as unittest except ImportError: import unittest try: buffer except NameError: buffer = memoryview import os import array import pytest import hashlib from .keys import VerifyingKey, SigningKey, MalformedPointError from .der import ( unpem, UnexpectedDER, encode_sequence, encode_oid, encode_bitstring, ) from .util import ( sigencode_string, sigencode_der, sigencode_strings, sigdecode_string, sigdecode_der, sigdecode_strings, ) from .curves import NIST256p, Curve, BRAINPOOLP160r1, Ed25519, Ed448 from .ellipticcurve import Point, PointJacobi, CurveFp, INFINITY from .ecdsa import generator_brainpoolp160r1 class TestVerifyingKeyFromString(unittest.TestCase): """ Verify that ecdsa.keys.VerifyingKey.from_string() can be used with bytes-like objects """ @classmethod def setUpClass(cls): cls.key_bytes = ( b"\x04L\xa2\x95\xdb\xc7Z\xd7\x1f\x93\nz\xcf\x97\xcf" b"\xd7\xc2\xd9o\xfe8}X!\xae\xd4\xfah\xfa^\rpI\xba\xd1" b"Y\xfb\x92xa\xebo+\x9cG\xfav\xca" ) cls.vk = VerifyingKey.from_string(cls.key_bytes) def test_bytes(self): self.assertIsNotNone(self.vk) self.assertIsInstance(self.vk, VerifyingKey) self.assertEqual( self.vk.pubkey.point.x(), 105419898848891948935835657980914000059957975659675736097, ) self.assertEqual( self.vk.pubkey.point.y(), 4286866841217412202667522375431381222214611213481632495306, ) def test_bytes_memoryview(self): vk = VerifyingKey.from_string(buffer(self.key_bytes)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytearray(self): vk = VerifyingKey.from_string(bytearray(self.key_bytes)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytesarray_memoryview(self): vk = VerifyingKey.from_string(buffer(bytearray(self.key_bytes))) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_array_array_of_bytes(self): arr = array.array("B", self.key_bytes) vk = VerifyingKey.from_string(arr) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_array_array_of_bytes_memoryview(self): arr = array.array("B", self.key_bytes) vk = VerifyingKey.from_string(buffer(arr)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_array_array_of_ints(self): arr = array.array("I", self.key_bytes) vk = VerifyingKey.from_string(arr) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_array_array_of_ints_memoryview(self): arr = array.array("I", self.key_bytes) vk = VerifyingKey.from_string(buffer(arr)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytes_uncompressed(self): vk = VerifyingKey.from_string(b"\x04" + self.key_bytes) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytearray_uncompressed(self): vk = VerifyingKey.from_string(bytearray(b"\x04" + self.key_bytes)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytes_compressed(self): vk = VerifyingKey.from_string(b"\x02" + self.key_bytes[:24]) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytearray_compressed(self): vk = VerifyingKey.from_string(bytearray(b"\x02" + self.key_bytes[:24])) self.assertEqual(self.vk.to_string(), vk.to_string()) class TestVerifyingKeyFromDer(unittest.TestCase): """ Verify that ecdsa.keys.VerifyingKey.from_der() can be used with bytes-like objects. """ @classmethod def setUpClass(cls): prv_key_str = ( "-----BEGIN EC PRIVATE KEY-----\n" "MF8CAQEEGF7IQgvW75JSqULpiQQ8op9WH6Uldw6xxaAKBggqhkjOPQMBAaE0AzIA\n" "BLiBd9CE7xf15FY5QIAoNg+fWbSk1yZOYtoGUdzkejWkxbRc9RWTQjqLVXucIJnz\n" "bA==\n" "-----END EC PRIVATE KEY-----\n" ) key_str = ( "-----BEGIN PUBLIC KEY-----\n" "MEkwEwYHKoZIzj0CAQYIKoZIzj0DAQEDMgAEuIF30ITvF/XkVjlAgCg2D59ZtKTX\n" "Jk5i2gZR3OR6NaTFtFz1FZNCOotVe5wgmfNs\n" "-----END PUBLIC KEY-----\n" ) cls.key_pem = key_str cls.key_bytes = unpem(key_str) assert isinstance(cls.key_bytes, bytes) cls.vk = VerifyingKey.from_pem(key_str) cls.sk = SigningKey.from_pem(prv_key_str) key_str = ( "-----BEGIN PUBLIC KEY-----\n" "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE4H3iRbG4TSrsSRb/gusPQB/4YcN8\n" "Poqzgjau4kfxBPyZimeRfuY/9g/wMmPuhGl4BUve51DsnKJFRr8psk0ieA==\n" "-----END PUBLIC KEY-----\n" ) cls.vk2 = VerifyingKey.from_pem(key_str) cls.sk2 = SigningKey.generate(vk.curve) def test_load_key_with_explicit_parameters(self): pub_key_str = ( "-----BEGIN PUBLIC KEY-----\n" "MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA\n" "AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////\n" "///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd\n" "NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5\n" "RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA\n" "//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABIr1UkgYs5jmbFc7it1/YI2X\n" "T//IlaEjMNZft1owjqpBYH2ErJHk4U5Pp4WvWq1xmHwIZlsH7Ig4KmefCfR6SmU=\n" "-----END PUBLIC KEY-----" ) pk = VerifyingKey.from_pem(pub_key_str) pk_exp = VerifyingKey.from_string( b"\x04\x8a\xf5\x52\x48\x18\xb3\x98\xe6\x6c\x57\x3b\x8a\xdd\x7f" b"\x60\x8d\x97\x4f\xff\xc8\x95\xa1\x23\x30\xd6\x5f\xb7\x5a\x30" b"\x8e\xaa\x41\x60\x7d\x84\xac\x91\xe4\xe1\x4e\x4f\xa7\x85\xaf" b"\x5a\xad\x71\x98\x7c\x08\x66\x5b\x07\xec\x88\x38\x2a\x67\x9f" b"\x09\xf4\x7a\x4a\x65", curve=NIST256p, ) self.assertEqual(pk, pk_exp) def test_load_key_with_explicit_with_explicit_disabled(self): pub_key_str = ( "-----BEGIN PUBLIC KEY-----\n" "MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA\n" "AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////\n" "///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd\n" "NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5\n" "RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA\n" "//////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABIr1UkgYs5jmbFc7it1/YI2X\n" "T//IlaEjMNZft1owjqpBYH2ErJHk4U5Pp4WvWq1xmHwIZlsH7Ig4KmefCfR6SmU=\n" "-----END PUBLIC KEY-----" ) with self.assertRaises(UnexpectedDER): VerifyingKey.from_pem( pub_key_str, valid_curve_encodings=["named_curve"] ) def test_load_key_with_disabled_format(self): with self.assertRaises(MalformedPointError) as e: VerifyingKey.from_der(self.key_bytes, valid_encodings=["raw"]) self.assertIn("enabled (raw) encodings", str(e.exception)) def test_custom_hashfunc(self): vk = VerifyingKey.from_der(self.key_bytes, hashlib.sha256) self.assertIs(vk.default_hashfunc, hashlib.sha256) def test_from_pem_with_custom_hashfunc(self): vk = VerifyingKey.from_pem(self.key_pem, hashlib.sha256) self.assertIs(vk.default_hashfunc, hashlib.sha256) def test_bytes(self): vk = VerifyingKey.from_der(self.key_bytes) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytes_memoryview(self): vk = VerifyingKey.from_der(buffer(self.key_bytes)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytearray(self): vk = VerifyingKey.from_der(bytearray(self.key_bytes)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_bytesarray_memoryview(self): vk = VerifyingKey.from_der(buffer(bytearray(self.key_bytes))) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_array_array_of_bytes(self): arr = array.array("B", self.key_bytes) vk = VerifyingKey.from_der(arr) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_array_array_of_bytes_memoryview(self): arr = array.array("B", self.key_bytes) vk = VerifyingKey.from_der(buffer(arr)) self.assertEqual(self.vk.to_string(), vk.to_string()) def test_equality_on_verifying_keys(self): self.assertEqual(self.vk, self.sk.get_verifying_key()) def test_inequality_on_verifying_keys(self): self.assertNotEqual(self.vk, self.vk2) def test_inequality_on_verifying_keys_not_implemented(self): self.assertNotEqual(self.vk, None) def test_VerifyingKey_inequality_on_same_curve(self): self.assertNotEqual(self.vk, self.sk2.verifying_key) def test_SigningKey_inequality_on_same_curve(self): self.assertNotEqual(self.sk, self.sk2) def test_inequality_on_wrong_types(self): self.assertNotEqual(self.vk, self.sk) def test_from_public_point_old(self): pj = self.vk.pubkey.point point = Point(pj.curve(), pj.x(), pj.y()) vk = VerifyingKey.from_public_point(point, self.vk.curve) self.assertEqual(vk, self.vk) def test_ed25519_VerifyingKey_repr__(self): sk = SigningKey.from_string(Ed25519.generator.to_bytes(), Ed25519) string = repr(sk.verifying_key) self.assertEqual( "VerifyingKey.from_string(" "bytearray(b'K\\x0c\\xfbZH\\x8e\\x8c\\x8c\\x07\\xee\\xda\\xfb" "\\xe1\\x97\\xcd\\x90\\x18\\x02\\x15h]\\xfe\\xbe\\xcbB\\xba\\xe6r" "\\x10\\xae\\xf1P'), Ed25519, None)", string, ) def test_edwards_from_public_point(self): point = Ed25519.generator with self.assertRaises(ValueError) as e: VerifyingKey.from_public_point(point, Ed25519) self.assertIn("incompatible with Edwards", str(e.exception)) def test_edwards_precompute_no_side_effect(self): sk = SigningKey.from_string(Ed25519.generator.to_bytes(), Ed25519) vk = sk.verifying_key vk2 = VerifyingKey.from_string(vk.to_string(), Ed25519) vk.precompute() self.assertEqual(vk, vk2) def test_parse_malfomed_eddsa_der_pubkey(self): der_str = encode_sequence( encode_sequence(encode_oid(*Ed25519.oid)), encode_bitstring(bytes(Ed25519.generator.to_bytes()), 0), encode_bitstring(b"\x00", 0), ) with self.assertRaises(UnexpectedDER) as e: VerifyingKey.from_der(der_str) self.assertIn("trailing junk after public key", str(e.exception)) def test_edwards_from_public_key_recovery(self): with self.assertRaises(ValueError) as e: VerifyingKey.from_public_key_recovery(b"", b"", Ed25519) self.assertIn("unsupported for Edwards", str(e.exception)) def test_edwards_from_public_key_recovery_with_digest(self): with self.assertRaises(ValueError) as e: VerifyingKey.from_public_key_recovery_with_digest( b"", b"", Ed25519 ) self.assertIn("unsupported for Edwards", str(e.exception)) def test_load_ed25519_from_pem(self): vk_pem = ( "-----BEGIN PUBLIC KEY-----\n" "MCowBQYDK2VwAyEAIwBQ0NZkIiiO41WJfm5BV42u3kQm7lYnvIXmCy8qy2U=\n" "-----END PUBLIC KEY-----\n" ) vk = VerifyingKey.from_pem(vk_pem) self.assertIsInstance(vk.curve, Curve) self.assertIs(vk.curve, Ed25519) vk_str = ( b"\x23\x00\x50\xd0\xd6\x64\x22\x28\x8e\xe3\x55\x89\x7e\x6e\x41\x57" b"\x8d\xae\xde\x44\x26\xee\x56\x27\xbc\x85\xe6\x0b\x2f\x2a\xcb\x65" ) vk_2 = VerifyingKey.from_string(vk_str, Ed25519) self.assertEqual(vk, vk_2) def test_export_ed255_to_pem(self): vk_str = ( b"\x23\x00\x50\xd0\xd6\x64\x22\x28\x8e\xe3\x55\x89\x7e\x6e\x41\x57" b"\x8d\xae\xde\x44\x26\xee\x56\x27\xbc\x85\xe6\x0b\x2f\x2a\xcb\x65" ) vk = VerifyingKey.from_string(vk_str, Ed25519) vk_pem = ( b"-----BEGIN PUBLIC KEY-----\n" b"MCowBQYDK2VwAyEAIwBQ0NZkIiiO41WJfm5BV42u3kQm7lYnvIXmCy8qy2U=\n" b"-----END PUBLIC KEY-----\n" ) self.assertEqual(vk_pem, vk.to_pem()) def test_ed25519_export_import(self): sk = SigningKey.generate(Ed25519) vk = sk.verifying_key vk2 = VerifyingKey.from_pem(vk.to_pem()) self.assertEqual(vk, vk2) def test_ed25519_sig_verify(self): vk_pem = ( "-----BEGIN PUBLIC KEY-----\n" "MCowBQYDK2VwAyEAIwBQ0NZkIiiO41WJfm5BV42u3kQm7lYnvIXmCy8qy2U=\n" "-----END PUBLIC KEY-----\n" ) vk = VerifyingKey.from_pem(vk_pem) data = b"data\n" # signature created by OpenSSL 3.0.0 beta1 sig = ( b"\x64\x47\xab\x6a\x33\xcd\x79\x45\xad\x98\x11\x6c\xb9\xf2\x20\xeb" b"\x90\xd6\x50\xe3\xc7\x8f\x9f\x60\x10\xec\x75\xe0\x2f\x27\xd3\x96" b"\xda\xe8\x58\x7f\xe0\xfe\x46\x5c\x81\xef\x50\xec\x29\x9f\xae\xd5" b"\xad\x46\x3c\x91\x68\x83\x4d\xea\x8d\xa8\x19\x04\x04\x79\x03\x0b" ) self.assertTrue(vk.verify(sig, data)) def test_ed448_from_pem(self): pem_str = ( "-----BEGIN PUBLIC KEY-----\n" "MEMwBQYDK2VxAzoAeQtetSu7CMEzE+XWB10Bg47LCA0giNikOxHzdp+tZ/eK/En0\n" "dTdYD2ll94g58MhSnBiBQB9A1MMA\n" "-----END PUBLIC KEY-----\n" ) vk = VerifyingKey.from_pem(pem_str) self.assertIsInstance(vk.curve, Curve) self.assertIs(vk.curve, Ed448) vk_str = ( b"\x79\x0b\x5e\xb5\x2b\xbb\x08\xc1\x33\x13\xe5\xd6\x07\x5d\x01\x83" b"\x8e\xcb\x08\x0d\x20\x88\xd8\xa4\x3b\x11\xf3\x76\x9f\xad\x67\xf7" b"\x8a\xfc\x49\xf4\x75\x37\x58\x0f\x69\x65\xf7\x88\x39\xf0\xc8\x52" b"\x9c\x18\x81\x40\x1f\x40\xd4\xc3\x00" ) vk2 = VerifyingKey.from_string(vk_str, Ed448) self.assertEqual(vk, vk2) def test_ed448_to_pem(self): vk_str = ( b"\x79\x0b\x5e\xb5\x2b\xbb\x08\xc1\x33\x13\xe5\xd6\x07\x5d\x01\x83" b"\x8e\xcb\x08\x0d\x20\x88\xd8\xa4\x3b\x11\xf3\x76\x9f\xad\x67\xf7" b"\x8a\xfc\x49\xf4\x75\x37\x58\x0f\x69\x65\xf7\x88\x39\xf0\xc8\x52" b"\x9c\x18\x81\x40\x1f\x40\xd4\xc3\x00" ) vk = VerifyingKey.from_string(vk_str, Ed448) vk_pem = ( b"-----BEGIN PUBLIC KEY-----\n" b"MEMwBQYDK2VxAzoAeQtetSu7CMEzE+XWB10Bg47LCA0giNikOxHzdp+tZ/eK/En0\n" b"dTdYD2ll94g58MhSnBiBQB9A1MMA\n" b"-----END PUBLIC KEY-----\n" ) self.assertEqual(vk_pem, vk.to_pem()) def test_ed448_export_import(self): sk = SigningKey.generate(Ed448) vk = sk.verifying_key vk2 = VerifyingKey.from_pem(vk.to_pem()) self.assertEqual(vk, vk2) def test_ed448_sig_verify(self): pem_str = ( "-----BEGIN PUBLIC KEY-----\n" "MEMwBQYDK2VxAzoAeQtetSu7CMEzE+XWB10Bg47LCA0giNikOxHzdp+tZ/eK/En0\n" "dTdYD2ll94g58MhSnBiBQB9A1MMA\n" "-----END PUBLIC KEY-----\n" ) vk = VerifyingKey.from_pem(pem_str) data = b"data\n" # signature created by OpenSSL 3.0.0 beta1 sig = ( b"\x68\xed\x2c\x70\x35\x22\xca\x1c\x35\x03\xf3\xaa\x51\x33\x3d\x00" b"\xc0\xae\xb0\x54\xc5\xdc\x7f\x6f\x30\x57\xb4\x1d\xcb\xe9\xec\xfa" b"\xc8\x45\x3e\x51\xc1\xcb\x60\x02\x6a\xd0\x43\x11\x0b\x5f\x9b\xfa" b"\x32\x88\xb2\x38\x6b\xed\xac\x09\x00\x78\xb1\x7b\x5d\x7e\xf8\x16" b"\x31\xdd\x1b\x3f\x98\xa0\xce\x19\xe7\xd8\x1c\x9f\x30\xac\x2f\xd4" b"\x1e\x55\xbf\x21\x98\xf6\x4c\x8c\xbe\x81\xa5\x2d\x80\x4c\x62\x53" b"\x91\xd5\xee\x03\x30\xc6\x17\x66\x4b\x9e\x0c\x8d\x40\xd0\xad\xae" b"\x0a\x00" ) self.assertTrue(vk.verify(sig, data)) class TestSigningKey(unittest.TestCase): """ Verify that ecdsa.keys.SigningKey.from_der() can be used with bytes-like objects. """ @classmethod def setUpClass(cls): prv_key_str = ( "-----BEGIN EC PRIVATE KEY-----\n" "MF8CAQEEGF7IQgvW75JSqULpiQQ8op9WH6Uldw6xxaAKBggqhkjOPQMBAaE0AzIA\n" "BLiBd9CE7xf15FY5QIAoNg+fWbSk1yZOYtoGUdzkejWkxbRc9RWTQjqLVXucIJnz\n" "bA==\n" "-----END EC PRIVATE KEY-----\n" ) cls.sk1 = SigningKey.from_pem(prv_key_str) prv_key_str = ( "-----BEGIN PRIVATE KEY-----\n" "MG8CAQAwEwYHKoZIzj0CAQYIKoZIzj0DAQEEVTBTAgEBBBheyEIL1u+SUqlC6YkE\n" "PKKfVh+lJXcOscWhNAMyAAS4gXfQhO8X9eRWOUCAKDYPn1m0pNcmTmLaBlHc5Ho1\n" "pMW0XPUVk0I6i1V7nCCZ82w=\n" "-----END PRIVATE KEY-----\n" ) cls.sk1_pkcs8 = SigningKey.from_pem(prv_key_str) prv_key_str = ( "-----BEGIN EC PRIVATE KEY-----\n" "MHcCAQEEIKlL2EAm5NPPZuXwxRf4nXMk0A80y6UUbiQ17be/qFhRoAoGCCqGSM49\n" "AwEHoUQDQgAE4H3iRbG4TSrsSRb/gusPQB/4YcN8Poqzgjau4kfxBPyZimeRfuY/\n" "9g/wMmPuhGl4BUve51DsnKJFRr8psk0ieA==\n" "-----END EC PRIVATE KEY-----\n" ) cls.sk2 = SigningKey.from_pem(prv_key_str) def test_decoding_explicit_curve_parameters(self): prv_key_str = ( "-----BEGIN PRIVATE KEY-----\n" "MIIBeQIBADCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAAB\n" "AAAAAAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA\n" "///////////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMV\n" "AMSdNgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg\n" "9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8A\n" "AAAA//////////+85vqtpxeehPO5ysL8YyVRAgEBBG0wawIBAQQgIXtREfUmR16r\n" "ZbmvDGD2lAEFPZa2DLPyz0czSja58yChRANCAASK9VJIGLOY5mxXO4rdf2CNl0//\n" "yJWhIzDWX7daMI6qQWB9hKyR5OFOT6eFr1qtcZh8CGZbB+yIOCpnnwn0ekpl\n" "-----END PRIVATE KEY-----\n" ) sk = SigningKey.from_pem(prv_key_str) sk2 = SigningKey.from_string( b"\x21\x7b\x51\x11\xf5\x26\x47\x5e\xab\x65\xb9\xaf\x0c\x60\xf6" b"\x94\x01\x05\x3d\x96\xb6\x0c\xb3\xf2\xcf\x47\x33\x4a\x36\xb9" b"\xf3\x20", curve=NIST256p, ) self.assertEqual(sk, sk2) def test_decoding_explicit_curve_parameters_with_explicit_disabled(self): prv_key_str = ( "-----BEGIN PRIVATE KEY-----\n" "MIIBeQIBADCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAAB\n" "AAAAAAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA\n" "///////////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMV\n" "AMSdNgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg\n" "9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8A\n" "AAAA//////////+85vqtpxeehPO5ysL8YyVRAgEBBG0wawIBAQQgIXtREfUmR16r\n" "ZbmvDGD2lAEFPZa2DLPyz0czSja58yChRANCAASK9VJIGLOY5mxXO4rdf2CNl0//\n" "yJWhIzDWX7daMI6qQWB9hKyR5OFOT6eFr1qtcZh8CGZbB+yIOCpnnwn0ekpl\n" "-----END PRIVATE KEY-----\n" ) with self.assertRaises(UnexpectedDER): SigningKey.from_pem( prv_key_str, valid_curve_encodings=["named_curve"] ) def test_equality_on_signing_keys(self): sk = SigningKey.from_secret_exponent( self.sk1.privkey.secret_multiplier, self.sk1.curve ) self.assertEqual(self.sk1, sk) self.assertEqual(self.sk1_pkcs8, sk) def test_verify_with_empty_message(self): sig = self.sk1.sign(b"") self.assertTrue(sig) vk = self.sk1.verifying_key self.assertTrue(vk.verify(sig, b"")) def test_verify_with_precompute(self): sig = self.sk1.sign(b"message") vk = self.sk1.verifying_key vk.precompute() self.assertTrue(vk.verify(sig, b"message")) def test_compare_verifying_key_with_precompute(self): vk1 = self.sk1.verifying_key vk1.precompute() vk2 = self.sk1_pkcs8.verifying_key self.assertEqual(vk1, vk2) def test_verify_with_lazy_precompute(self): sig = self.sk2.sign(b"other message") vk = self.sk2.verifying_key vk.precompute(lazy=True) self.assertTrue(vk.verify(sig, b"other message")) def test_inequality_on_signing_keys(self): self.assertNotEqual(self.sk1, self.sk2) def test_inequality_on_signing_keys_not_implemented(self): self.assertNotEqual(self.sk1, None) def test_ed25519_from_pem(self): pem_str = ( "-----BEGIN PRIVATE KEY-----\n" "MC4CAQAwBQYDK2VwBCIEIDS6x9FO1PG8T4xIPg8Zd0z8uL6sVGZFEZrX17gHC/XU\n" "-----END PRIVATE KEY-----\n" ) sk = SigningKey.from_pem(pem_str) sk_str = SigningKey.from_string( b"\x34\xBA\xC7\xD1\x4E\xD4\xF1\xBC\x4F\x8C\x48\x3E\x0F\x19\x77\x4C" b"\xFC\xB8\xBE\xAC\x54\x66\x45\x11\x9A\xD7\xD7\xB8\x07\x0B\xF5\xD4", Ed25519, ) self.assertEqual(sk, sk_str) def test_ed25519_to_pem(self): sk = SigningKey.from_string( b"\x34\xBA\xC7\xD1\x4E\xD4\xF1\xBC\x4F\x8C\x48\x3E\x0F\x19\x77\x4C" b"\xFC\xB8\xBE\xAC\x54\x66\x45\x11\x9A\xD7\xD7\xB8\x07\x0B\xF5\xD4", Ed25519, ) pem_str = ( b"-----BEGIN PRIVATE KEY-----\n" b"MC4CAQAwBQYDK2VwBCIEIDS6x9FO1PG8T4xIPg8Zd0z8uL6sVGZFEZrX17gHC/XU\n" b"-----END PRIVATE KEY-----\n" ) self.assertEqual(sk.to_pem(format="pkcs8"), pem_str) def test_ed25519_to_and_from_pem(self): sk = SigningKey.generate(Ed25519) decoded = SigningKey.from_pem(sk.to_pem(format="pkcs8")) self.assertEqual(sk, decoded) def test_ed448_from_pem(self): pem_str = ( "-----BEGIN PRIVATE KEY-----\n" "MEcCAQAwBQYDK2VxBDsEOTyFuXqFLXgJlV8uDqcOw9nG4IqzLiZ/i5NfBDoHPzmP\n" "OP0JMYaLGlTzwovmvCDJ2zLaezu9NLz9aQ==\n" "-----END PRIVATE KEY-----\n" ) sk = SigningKey.from_pem(pem_str) sk_str = SigningKey.from_string( b"\x3C\x85\xB9\x7A\x85\x2D\x78\x09\x95\x5F\x2E\x0E\xA7\x0E\xC3\xD9" b"\xC6\xE0\x8A\xB3\x2E\x26\x7F\x8B\x93\x5F\x04\x3A\x07\x3F\x39\x8F" b"\x38\xFD\x09\x31\x86\x8B\x1A\x54\xF3\xC2\x8B\xE6\xBC\x20\xC9\xDB" b"\x32\xDA\x7B\x3B\xBD\x34\xBC\xFD\x69", Ed448, ) self.assertEqual(sk, sk_str) def test_ed448_to_pem(self): sk = SigningKey.from_string( b"\x3C\x85\xB9\x7A\x85\x2D\x78\x09\x95\x5F\x2E\x0E\xA7\x0E\xC3\xD9" b"\xC6\xE0\x8A\xB3\x2E\x26\x7F\x8B\x93\x5F\x04\x3A\x07\x3F\x39\x8F" b"\x38\xFD\x09\x31\x86\x8B\x1A\x54\xF3\xC2\x8B\xE6\xBC\x20\xC9\xDB" b"\x32\xDA\x7B\x3B\xBD\x34\xBC\xFD\x69", Ed448, ) pem_str = ( b"-----BEGIN PRIVATE KEY-----\n" b"MEcCAQAwBQYDK2VxBDsEOTyFuXqFLXgJlV8uDqcOw9nG4IqzLiZ/i5NfBDoHPzmP\n" b"OP0JMYaLGlTzwovmvCDJ2zLaezu9NLz9aQ==\n" b"-----END PRIVATE KEY-----\n" ) self.assertEqual(sk.to_pem(format="pkcs8"), pem_str) def test_ed448_encode_decode(self): sk = SigningKey.generate(Ed448) decoded = SigningKey.from_pem(sk.to_pem(format="pkcs8")) self.assertEqual(decoded, sk) class TestTrivialCurve(unittest.TestCase): @classmethod def setUpClass(cls): # To test what happens with r or s in signing happens to be zero we # need to find a scalar that creates one of the points on a curve that # has x coordinate equal to zero. # Even for secp112r2 curve that's non trivial so use this toy # curve, for which we can iterate over all points quickly curve = CurveFp(163, 84, 58) gen = PointJacobi(curve, 2, 87, 1, 167, generator=True) cls.toy_curve = Curve("toy_p8", curve, gen, (1, 2, 0)) cls.sk = SigningKey.from_secret_exponent( 140, cls.toy_curve, hashfunc=hashlib.sha1, ) def test_generator_sanity(self): gen = self.toy_curve.generator self.assertEqual(gen * gen.order(), INFINITY) def test_public_key_sanity(self): self.assertEqual(self.sk.verifying_key.to_string(), b"\x98\x1e") def test_deterministic_sign(self): sig = self.sk.sign_deterministic(b"message") self.assertEqual(sig, b"-.") self.assertTrue(self.sk.verifying_key.verify(sig, b"message")) def test_deterministic_sign_random_message(self): msg = os.urandom(32) sig = self.sk.sign_deterministic(msg) self.assertEqual(len(sig), 2) self.assertTrue(self.sk.verifying_key.verify(sig, msg)) def test_deterministic_sign_that_rises_R_zero_error(self): # the raised RSZeroError is caught and handled internally by # sign_deterministic methods msg = b"\x00\x4f" sig = self.sk.sign_deterministic(msg) self.assertEqual(sig, b"\x36\x9e") self.assertTrue(self.sk.verifying_key.verify(sig, msg)) def test_deterministic_sign_that_rises_S_zero_error(self): msg = b"\x01\x6d" sig = self.sk.sign_deterministic(msg) self.assertEqual(sig, b"\x49\x6c") self.assertTrue(self.sk.verifying_key.verify(sig, msg)) # test VerifyingKey.verify() prv_key_str = ( "-----BEGIN EC PRIVATE KEY-----\n" "MF8CAQEEGF7IQgvW75JSqULpiQQ8op9WH6Uldw6xxaAKBggqhkjOPQMBAaE0AzIA\n" "BLiBd9CE7xf15FY5QIAoNg+fWbSk1yZOYtoGUdzkejWkxbRc9RWTQjqLVXucIJnz\n" "bA==\n" "-----END EC PRIVATE KEY-----\n" ) key_bytes = unpem(prv_key_str) assert isinstance(key_bytes, bytes) sk = SigningKey.from_der(key_bytes) vk = sk.verifying_key data = ( b"some string for signing" b"contents don't really matter" b"but do include also some crazy values: " b"\x00\x01\t\r\n\x00\x00\x00\xff\xf0" ) assert len(data) % 4 == 0 sha1 = hashlib.sha1() sha1.update(data) data_hash = sha1.digest() assert isinstance(data_hash, bytes) sig_raw = sk.sign(data, sigencode=sigencode_string) assert isinstance(sig_raw, bytes) sig_der = sk.sign(data, sigencode=sigencode_der) assert isinstance(sig_der, bytes) sig_strings = sk.sign(data, sigencode=sigencode_strings) assert isinstance(sig_strings[0], bytes) verifiers = [] for modifier, fun in [ ("bytes", lambda x: x), ("bytes memoryview", lambda x: buffer(x)), ("bytearray", lambda x: bytearray(x)), ("bytearray memoryview", lambda x: buffer(bytearray(x))), ("array.array of bytes", lambda x: array.array("B", x)), ("array.array of bytes memoryview", lambda x: buffer(array.array("B", x))), ("array.array of ints", lambda x: array.array("I", x)), ("array.array of ints memoryview", lambda x: buffer(array.array("I", x))), ]: if "ints" in modifier: conv = lambda x: x else: conv = fun for sig_format, signature, decoder, mod_apply in [ ("raw", sig_raw, sigdecode_string, lambda x: conv(x)), ("der", sig_der, sigdecode_der, lambda x: conv(x)), ( "strings", sig_strings, sigdecode_strings, lambda x: tuple(conv(i) for i in x), ), ]: for method_name, vrf_mthd, vrf_data in [ ("verify", vk.verify, data), ("verify_digest", vk.verify_digest, data_hash), ]: verifiers.append( pytest.param( signature, decoder, mod_apply, fun, vrf_mthd, vrf_data, id="{2}-{0}-{1}".format(modifier, sig_format, method_name), ) ) @pytest.mark.parametrize( "signature,decoder,mod_apply,fun,vrf_mthd,vrf_data", verifiers ) def test_VerifyingKey_verify( signature, decoder, mod_apply, fun, vrf_mthd, vrf_data ): sig = mod_apply(signature) assert vrf_mthd(sig, fun(vrf_data), sigdecode=decoder) # test SigningKey.from_string() prv_key_bytes = ( b"^\xc8B\x0b\xd6\xef\x92R\xa9B\xe9\x89\x04<\xa2" b"\x9fV\x1f\xa5%w\x0e\xb1\xc5" ) assert len(prv_key_bytes) == 24 converters = [] for modifier, convert in [ ("bytes", lambda x: x), ("bytes memoryview", buffer), ("bytearray", bytearray), ("bytearray memoryview", lambda x: buffer(bytearray(x))), ("array.array of bytes", lambda x: array.array("B", x)), ("array.array of bytes memoryview", lambda x: buffer(array.array("B", x))), ("array.array of ints", lambda x: array.array("I", x)), ("array.array of ints memoryview", lambda x: buffer(array.array("I", x))), ]: converters.append(pytest.param(convert, id=modifier)) @pytest.mark.parametrize("convert", converters) def test_SigningKey_from_string(convert): key = convert(prv_key_bytes) sk = SigningKey.from_string(key) assert sk.to_string() == prv_key_bytes # test SigningKey.from_der() prv_key_str = ( "-----BEGIN EC PRIVATE KEY-----\n" "MF8CAQEEGF7IQgvW75JSqULpiQQ8op9WH6Uldw6xxaAKBggqhkjOPQMBAaE0AzIA\n" "BLiBd9CE7xf15FY5QIAoNg+fWbSk1yZOYtoGUdzkejWkxbRc9RWTQjqLVXucIJnz\n" "bA==\n" "-----END EC PRIVATE KEY-----\n" ) key_bytes = unpem(prv_key_str) assert isinstance(key_bytes, bytes) # last two converters are for array.array of ints, those require input # that's multiple of 4, which no curve we support produces @pytest.mark.parametrize("convert", converters[:-2]) def test_SigningKey_from_der(convert): key = convert(key_bytes) sk = SigningKey.from_der(key) assert sk.to_string() == prv_key_bytes # test SigningKey.sign_deterministic() extra_entropy = b"\x0a\x0b\x0c\x0d\x0e\x0f\x10\x11" @pytest.mark.parametrize("convert", converters) def test_SigningKey_sign_deterministic(convert): sig = sk.sign_deterministic( convert(data), extra_entropy=convert(extra_entropy) ) vk.verify(sig, data) # test SigningKey.sign_digest_deterministic() @pytest.mark.parametrize("convert", converters) def test_SigningKey_sign_digest_deterministic(convert): sig = sk.sign_digest_deterministic( convert(data_hash), extra_entropy=convert(extra_entropy) ) vk.verify(sig, data) @pytest.mark.parametrize("convert", converters) def test_SigningKey_sign(convert): sig = sk.sign(convert(data)) vk.verify(sig, data) @pytest.mark.parametrize("convert", converters) def test_SigningKey_sign_digest(convert): sig = sk.sign_digest(convert(data_hash)) vk.verify(sig, data) def test_SigningKey_with_unlikely_value(): sk = SigningKey.from_secret_exponent(NIST256p.order - 1, curve=NIST256p) vk = sk.verifying_key sig = sk.sign(b"hello") assert vk.verify(sig, b"hello") def test_SigningKey_with_custom_curve_old_point(): generator = generator_brainpoolp160r1 generator = Point( generator.curve(), generator.x(), generator.y(), generator.order(), ) curve = Curve( "BRAINPOOLP160r1", generator.curve(), generator, (1, 3, 36, 3, 3, 2, 8, 1, 1, 1), ) sk = SigningKey.from_secret_exponent(12, curve) sk2 = SigningKey.from_secret_exponent(12, BRAINPOOLP160r1) assert sk.privkey == sk2.privkey def test_VerifyingKey_inequality_with_different_curves(): sk1 = SigningKey.from_secret_exponent(2, BRAINPOOLP160r1) sk2 = SigningKey.from_secret_exponent(2, NIST256p) assert sk1.verifying_key != sk2.verifying_key def test_VerifyingKey_inequality_with_different_secret_points(): sk1 = SigningKey.from_secret_exponent(2, BRAINPOOLP160r1) sk2 = SigningKey.from_secret_exponent(3, BRAINPOOLP160r1) assert sk1.verifying_key != sk2.verifying_key def test_SigningKey_from_pem_pkcs8v2_EdDSA(): pem = """-----BEGIN PRIVATE KEY----- MFMCAQEwBQYDK2VwBCIEICc2F2ag1n1QP0jY+g9qWx5sDkx0s/HdNi3cSRHw+zsI oSMDIQA+HQ2xCif8a/LMWR2m5HaCm5I2pKe/cc8OiRANMHxjKQ== -----END PRIVATE KEY-----""" sk = SigningKey.from_pem(pem) assert sk.curve == Ed25519