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Diffstat (limited to 'freezed_deps/ecdsa/test_pyecdsa.py')
| -rw-r--r-- | freezed_deps/ecdsa/test_pyecdsa.py | 1445 |
1 files changed, 1445 insertions, 0 deletions
diff --git a/freezed_deps/ecdsa/test_pyecdsa.py b/freezed_deps/ecdsa/test_pyecdsa.py new file mode 100644 index 0000000..d83eb01 --- /dev/null +++ b/freezed_deps/ecdsa/test_pyecdsa.py @@ -0,0 +1,1445 @@ +from __future__ import with_statement, division + +try: + import unittest2 as unittest +except ImportError: + import unittest +import os +import time +import shutil +import subprocess +import pytest +from binascii import hexlify, unhexlify +from hashlib import sha1, sha256, sha384, sha512 +import hashlib +from functools import partial + +from hypothesis import given +import hypothesis.strategies as st + +from six import b, print_, binary_type +from .keys import SigningKey, VerifyingKey +from .keys import BadSignatureError, MalformedPointError, BadDigestError +from . import util +from .util import sigencode_der, sigencode_strings +from .util import sigdecode_der, sigdecode_strings +from .util import number_to_string, encoded_oid_ecPublicKey, \ + MalformedSignature +from .curves import Curve, UnknownCurveError +from .curves import NIST192p, NIST224p, NIST256p, NIST384p, NIST521p, \ + SECP256k1, BRAINPOOLP160r1, BRAINPOOLP192r1, BRAINPOOLP224r1, \ + BRAINPOOLP256r1, BRAINPOOLP320r1, BRAINPOOLP384r1, BRAINPOOLP512r1, \ + curves +from .ecdsa import curve_brainpoolp224r1, curve_brainpoolp256r1, \ + curve_brainpoolp384r1, curve_brainpoolp512r1 +from .ellipticcurve import Point +from . import der +from . import rfc6979 +from . import ecdsa + + +class SubprocessError(Exception): + pass + + +def run_openssl(cmd): + OPENSSL = "openssl" + p = subprocess.Popen([OPENSSL] + cmd.split(), + stdout=subprocess.PIPE, + stderr=subprocess.STDOUT) + stdout, ignored = p.communicate() + if p.returncode != 0: + raise SubprocessError("cmd '%s %s' failed: rc=%s, stdout/err was %s" % + (OPENSSL, cmd, p.returncode, stdout)) + return stdout.decode() + + +class ECDSA(unittest.TestCase): + def test_basic(self): + priv = SigningKey.generate() + pub = priv.get_verifying_key() + + data = b("blahblah") + sig = priv.sign(data) + + self.assertTrue(pub.verify(sig, data)) + self.assertRaises(BadSignatureError, pub.verify, sig, data + b("bad")) + + pub2 = VerifyingKey.from_string(pub.to_string()) + self.assertTrue(pub2.verify(sig, data)) + + def test_deterministic(self): + data = b("blahblah") + secexp = int("9d0219792467d7d37b4d43298a7d0c05", 16) + + priv = SigningKey.from_secret_exponent(secexp, SECP256k1, sha256) + pub = priv.get_verifying_key() + + k = rfc6979.generate_k( + SECP256k1.generator.order(), secexp, sha256, sha256(data).digest()) + + sig1 = priv.sign(data, k=k) + self.assertTrue(pub.verify(sig1, data)) + + sig2 = priv.sign(data, k=k) + self.assertTrue(pub.verify(sig2, data)) + + sig3 = priv.sign_deterministic(data, sha256) + self.assertTrue(pub.verify(sig3, data)) + + self.assertEqual(sig1, sig2) + self.assertEqual(sig1, sig3) + + def test_bad_usage(self): + # sk=SigningKey() is wrong + self.assertRaises(TypeError, SigningKey) + self.assertRaises(TypeError, VerifyingKey) + + def test_lengths(self): + default = NIST192p + priv = SigningKey.generate() + pub = priv.get_verifying_key() + self.assertEqual(len(pub.to_string()), default.verifying_key_length) + sig = priv.sign(b("data")) + self.assertEqual(len(sig), default.signature_length) + for curve in (NIST192p, NIST224p, NIST256p, NIST384p, NIST521p, + BRAINPOOLP160r1, BRAINPOOLP192r1, BRAINPOOLP224r1, + BRAINPOOLP256r1, BRAINPOOLP320r1, BRAINPOOLP384r1, + BRAINPOOLP512r1): + start = time.time() + priv = SigningKey.generate(curve=curve) + pub1 = priv.get_verifying_key() + keygen_time = time.time() - start + pub2 = VerifyingKey.from_string(pub1.to_string(), curve) + self.assertEqual(pub1.to_string(), pub2.to_string()) + self.assertEqual(len(pub1.to_string()), + curve.verifying_key_length) + start = time.time() + sig = priv.sign(b("data")) + sign_time = time.time() - start + self.assertEqual(len(sig), curve.signature_length) + + def test_serialize(self): + seed = b("secret") + curve = NIST192p + secexp1 = util.randrange_from_seed__trytryagain(seed, curve.order) + secexp2 = util.randrange_from_seed__trytryagain(seed, curve.order) + self.assertEqual(secexp1, secexp2) + priv1 = SigningKey.from_secret_exponent(secexp1, curve) + priv2 = SigningKey.from_secret_exponent(secexp2, curve) + self.assertEqual(hexlify(priv1.to_string()), + hexlify(priv2.to_string())) + self.assertEqual(priv1.to_pem(), priv2.to_pem()) + pub1 = priv1.get_verifying_key() + pub2 = priv2.get_verifying_key() + data = b("data") + sig1 = priv1.sign(data) + sig2 = priv2.sign(data) + self.assertTrue(pub1.verify(sig1, data)) + self.assertTrue(pub2.verify(sig1, data)) + self.assertTrue(pub1.verify(sig2, data)) + self.assertTrue(pub2.verify(sig2, data)) + self.assertEqual(hexlify(pub1.to_string()), + hexlify(pub2.to_string())) + + def test_nonrandom(self): + s = b("all the entropy in the entire world, compressed into one line") + + def not_much_entropy(numbytes): + return s[:numbytes] + + # we control the entropy source, these two keys should be identical: + priv1 = SigningKey.generate(entropy=not_much_entropy) + priv2 = SigningKey.generate(entropy=not_much_entropy) + self.assertEqual(hexlify(priv1.get_verifying_key().to_string()), + hexlify(priv2.get_verifying_key().to_string())) + # likewise, signatures should be identical. Obviously you'd never + # want to do this with keys you care about, because the secrecy of + # the private key depends upon using different random numbers for + # each signature + sig1 = priv1.sign(b("data"), entropy=not_much_entropy) + sig2 = priv2.sign(b("data"), entropy=not_much_entropy) + self.assertEqual(hexlify(sig1), hexlify(sig2)) + + def assertTruePrivkeysEqual(self, priv1, priv2): + self.assertEqual(priv1.privkey.secret_multiplier, + priv2.privkey.secret_multiplier) + self.assertEqual(priv1.privkey.public_key.generator, + priv2.privkey.public_key.generator) + + def test_privkey_creation(self): + s = b("all the entropy in the entire world, compressed into one line") + + def not_much_entropy(numbytes): + return s[:numbytes] + + priv1 = SigningKey.generate() + self.assertEqual(priv1.baselen, NIST192p.baselen) + + priv1 = SigningKey.generate(curve=NIST224p) + self.assertEqual(priv1.baselen, NIST224p.baselen) + + priv1 = SigningKey.generate(entropy=not_much_entropy) + self.assertEqual(priv1.baselen, NIST192p.baselen) + priv2 = SigningKey.generate(entropy=not_much_entropy) + self.assertEqual(priv2.baselen, NIST192p.baselen) + self.assertTruePrivkeysEqual(priv1, priv2) + + priv1 = SigningKey.from_secret_exponent(secexp=3) + self.assertEqual(priv1.baselen, NIST192p.baselen) + priv2 = SigningKey.from_secret_exponent(secexp=3) + self.assertTruePrivkeysEqual(priv1, priv2) + + priv1 = SigningKey.from_secret_exponent(secexp=4, curve=NIST224p) + self.assertEqual(priv1.baselen, NIST224p.baselen) + + def test_privkey_strings(self): + priv1 = SigningKey.generate() + s1 = priv1.to_string() + self.assertEqual(type(s1), binary_type) + self.assertEqual(len(s1), NIST192p.baselen) + priv2 = SigningKey.from_string(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + s1 = priv1.to_pem() + self.assertEqual(type(s1), binary_type) + self.assertTrue(s1.startswith(b("-----BEGIN EC PRIVATE KEY-----"))) + self.assertTrue(s1.strip().endswith(b("-----END EC PRIVATE KEY-----"))) + priv2 = SigningKey.from_pem(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + s1 = priv1.to_der() + self.assertEqual(type(s1), binary_type) + priv2 = SigningKey.from_der(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + priv1 = SigningKey.generate(curve=NIST256p) + s1 = priv1.to_pem() + self.assertEqual(type(s1), binary_type) + self.assertTrue(s1.startswith(b("-----BEGIN EC PRIVATE KEY-----"))) + self.assertTrue(s1.strip().endswith(b("-----END EC PRIVATE KEY-----"))) + priv2 = SigningKey.from_pem(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + s1 = priv1.to_der() + self.assertEqual(type(s1), binary_type) + priv2 = SigningKey.from_der(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + def test_privkey_strings_brainpool(self): + priv1 = SigningKey.generate(curve=BRAINPOOLP512r1) + s1 = priv1.to_pem() + self.assertEqual(type(s1), binary_type) + self.assertTrue(s1.startswith(b("-----BEGIN EC PRIVATE KEY-----"))) + self.assertTrue(s1.strip().endswith(b("-----END EC PRIVATE KEY-----"))) + priv2 = SigningKey.from_pem(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + s1 = priv1.to_der() + self.assertEqual(type(s1), binary_type) + priv2 = SigningKey.from_der(s1) + self.assertTruePrivkeysEqual(priv1, priv2) + + def assertTruePubkeysEqual(self, pub1, pub2): + self.assertEqual(pub1.pubkey.point, pub2.pubkey.point) + self.assertEqual(pub1.pubkey.generator, pub2.pubkey.generator) + self.assertEqual(pub1.curve, pub2.curve) + + def test_pubkey_strings(self): + priv1 = SigningKey.generate() + pub1 = priv1.get_verifying_key() + s1 = pub1.to_string() + self.assertEqual(type(s1), binary_type) + self.assertEqual(len(s1), NIST192p.verifying_key_length) + pub2 = VerifyingKey.from_string(s1) + self.assertTruePubkeysEqual(pub1, pub2) + + priv1 = SigningKey.generate(curve=NIST256p) + pub1 = priv1.get_verifying_key() + s1 = pub1.to_string() + self.assertEqual(type(s1), binary_type) + self.assertEqual(len(s1), NIST256p.verifying_key_length) + pub2 = VerifyingKey.from_string(s1, curve=NIST256p) + self.assertTruePubkeysEqual(pub1, pub2) + + pub1_der = pub1.to_der() + self.assertEqual(type(pub1_der), binary_type) + pub2 = VerifyingKey.from_der(pub1_der) + self.assertTruePubkeysEqual(pub1, pub2) + + self.assertRaises(der.UnexpectedDER, + VerifyingKey.from_der, pub1_der + b("junk")) + badpub = VerifyingKey.from_der(pub1_der) + + class FakeGenerator: + def order(self): + return 123456789 + + badcurve = Curve("unknown", None, FakeGenerator(), (1, 2, 3, 4, 5, 6), None) + badpub.curve = badcurve + badder = badpub.to_der() + self.assertRaises(UnknownCurveError, VerifyingKey.from_der, badder) + + pem = pub1.to_pem() + self.assertEqual(type(pem), binary_type) + self.assertTrue(pem.startswith(b("-----BEGIN PUBLIC KEY-----")), pem) + self.assertTrue(pem.strip().endswith(b("-----END PUBLIC KEY-----")), pem) + pub2 = VerifyingKey.from_pem(pem) + self.assertTruePubkeysEqual(pub1, pub2) + + def test_pubkey_strings_brainpool(self): + priv1 = SigningKey.generate(curve=BRAINPOOLP512r1) + pub1 = priv1.get_verifying_key() + s1 = pub1.to_string() + self.assertEqual(type(s1), binary_type) + self.assertEqual(len(s1), BRAINPOOLP512r1.verifying_key_length) + pub2 = VerifyingKey.from_string(s1, curve=BRAINPOOLP512r1) + self.assertTruePubkeysEqual(pub1, pub2) + + pub1_der = pub1.to_der() + self.assertEqual(type(pub1_der), binary_type) + pub2 = VerifyingKey.from_der(pub1_der) + self.assertTruePubkeysEqual(pub1, pub2) + + def test_vk_to_der_with_invalid_point_encoding(self): + sk = SigningKey.generate() + vk = sk.verifying_key + + with self.assertRaises(ValueError): + vk.to_der("raw") + + def test_sk_to_der_with_invalid_point_encoding(self): + sk = SigningKey.generate() + + with self.assertRaises(ValueError): + sk.to_der("raw") + + def test_vk_from_der_garbage_after_curve_oid(self): + type_oid_der = encoded_oid_ecPublicKey + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + \ + b('garbage') + enc_type_der = der.encode_sequence(type_oid_der, curve_oid_der) + point_der = der.encode_bitstring(b'\x00\xff', None) + to_decode = der.encode_sequence(enc_type_der, point_der) + + with self.assertRaises(der.UnexpectedDER): + VerifyingKey.from_der(to_decode) + + def test_vk_from_der_invalid_key_type(self): + type_oid_der = der.encode_oid(*(1, 2, 3)) + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + enc_type_der = der.encode_sequence(type_oid_der, curve_oid_der) + point_der = der.encode_bitstring(b'\x00\xff', None) + to_decode = der.encode_sequence(enc_type_der, point_der) + + with self.assertRaises(der.UnexpectedDER): + VerifyingKey.from_der(to_decode) + + def test_vk_from_der_garbage_after_point_string(self): + type_oid_der = encoded_oid_ecPublicKey + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + enc_type_der = der.encode_sequence(type_oid_der, curve_oid_der) + point_der = der.encode_bitstring(b'\x00\xff', None) + b('garbage') + to_decode = der.encode_sequence(enc_type_der, point_der) + + with self.assertRaises(der.UnexpectedDER): + VerifyingKey.from_der(to_decode) + + def test_vk_from_der_invalid_bitstring(self): + type_oid_der = encoded_oid_ecPublicKey + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + enc_type_der = der.encode_sequence(type_oid_der, curve_oid_der) + point_der = der.encode_bitstring(b'\x08\xff', None) + to_decode = der.encode_sequence(enc_type_der, point_der) + + with self.assertRaises(der.UnexpectedDER): + VerifyingKey.from_der(to_decode) + + def test_vk_from_der_with_invalid_length_of_encoding(self): + type_oid_der = encoded_oid_ecPublicKey + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + enc_type_der = der.encode_sequence(type_oid_der, curve_oid_der) + point_der = der.encode_bitstring(b'\xff'*64, 0) + to_decode = der.encode_sequence(enc_type_der, point_der) + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_der(to_decode) + + def test_vk_from_der_with_raw_encoding(self): + type_oid_der = encoded_oid_ecPublicKey + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + enc_type_der = der.encode_sequence(type_oid_der, curve_oid_der) + point_der = der.encode_bitstring(b'\xff'*48, 0) + to_decode = der.encode_sequence(enc_type_der, point_der) + + with self.assertRaises(der.UnexpectedDER): + VerifyingKey.from_der(to_decode) + + def test_signature_strings(self): + priv1 = SigningKey.generate() + pub1 = priv1.get_verifying_key() + data = b("data") + + sig = priv1.sign(data) + self.assertEqual(type(sig), binary_type) + self.assertEqual(len(sig), NIST192p.signature_length) + self.assertTrue(pub1.verify(sig, data)) + + sig = priv1.sign(data, sigencode=sigencode_strings) + self.assertEqual(type(sig), tuple) + self.assertEqual(len(sig), 2) + self.assertEqual(type(sig[0]), binary_type) + self.assertEqual(type(sig[1]), binary_type) + self.assertEqual(len(sig[0]), NIST192p.baselen) + self.assertEqual(len(sig[1]), NIST192p.baselen) + self.assertTrue(pub1.verify(sig, data, sigdecode=sigdecode_strings)) + + sig_der = priv1.sign(data, sigencode=sigencode_der) + self.assertEqual(type(sig_der), binary_type) + self.assertTrue(pub1.verify(sig_der, data, sigdecode=sigdecode_der)) + + def test_sig_decode_strings_with_invalid_count(self): + with self.assertRaises(MalformedSignature): + sigdecode_strings([b('one'), b('two'), b('three')], 0xff) + + def test_sig_decode_strings_with_wrong_r_len(self): + with self.assertRaises(MalformedSignature): + sigdecode_strings([b('one'), b('two')], 0xff) + + def test_sig_decode_strings_with_wrong_s_len(self): + with self.assertRaises(MalformedSignature): + sigdecode_strings([b('\xa0'), b('\xb0\xff')], 0xff) + + def test_verify_with_too_long_input(self): + sk = SigningKey.generate() + vk = sk.verifying_key + + with self.assertRaises(BadDigestError): + vk.verify_digest(None, b('\x00') * 128) + + def test_sk_from_secret_exponent_with_wrong_sec_exponent(self): + with self.assertRaises(MalformedPointError): + SigningKey.from_secret_exponent(0) + + def test_sk_from_string_with_wrong_len_string(self): + with self.assertRaises(MalformedPointError): + SigningKey.from_string(b('\x01')) + + def test_sk_from_der_with_junk_after_sequence(self): + ver_der = der.encode_integer(1) + to_decode = der.encode_sequence(ver_der) + b('garbage') + + with self.assertRaises(der.UnexpectedDER): + SigningKey.from_der(to_decode) + + def test_sk_from_der_with_wrong_version(self): + ver_der = der.encode_integer(0) + to_decode = der.encode_sequence(ver_der) + + with self.assertRaises(der.UnexpectedDER): + SigningKey.from_der(to_decode) + + def test_sk_from_der_invalid_const_tag(self): + ver_der = der.encode_integer(1) + privkey_der = der.encode_octet_string(b('\x00\xff')) + curve_oid_der = der.encode_oid(*(1, 2, 3)) + const_der = der.encode_constructed(1, curve_oid_der) + to_decode = der.encode_sequence(ver_der, privkey_der, const_der, + curve_oid_der) + + with self.assertRaises(der.UnexpectedDER): + SigningKey.from_der(to_decode) + + def test_sk_from_der_garbage_after_privkey_oid(self): + ver_der = der.encode_integer(1) + privkey_der = der.encode_octet_string(b('\x00\xff')) + curve_oid_der = der.encode_oid(*(1, 2, 3)) + b('garbage') + const_der = der.encode_constructed(0, curve_oid_der) + to_decode = der.encode_sequence(ver_der, privkey_der, const_der, + curve_oid_der) + + with self.assertRaises(der.UnexpectedDER): + SigningKey.from_der(to_decode) + + def test_sk_from_der_with_short_privkey(self): + ver_der = der.encode_integer(1) + privkey_der = der.encode_octet_string(b('\x00\xff')) + curve_oid_der = der.encode_oid(*(1, 2, 840, 10045, 3, 1, 1)) + const_der = der.encode_constructed(0, curve_oid_der) + to_decode = der.encode_sequence(ver_der, privkey_der, const_der, + curve_oid_der) + + sk = SigningKey.from_der(to_decode) + self.assertEqual(sk.privkey.secret_multiplier, 255) + + def test_sign_with_too_long_hash(self): + sk = SigningKey.from_secret_exponent(12) + + with self.assertRaises(BadDigestError): + sk.sign_digest(b('\xff') * 64) + + def test_hashfunc(self): + sk = SigningKey.generate(curve=NIST256p, hashfunc=sha256) + data = b("security level is 128 bits") + sig = sk.sign(data) + vk = VerifyingKey.from_string(sk.get_verifying_key().to_string(), + curve=NIST256p, hashfunc=sha256) + self.assertTrue(vk.verify(sig, data)) + + sk2 = SigningKey.generate(curve=NIST256p) + sig2 = sk2.sign(data, hashfunc=sha256) + vk2 = VerifyingKey.from_string(sk2.get_verifying_key().to_string(), + curve=NIST256p, hashfunc=sha256) + self.assertTrue(vk2.verify(sig2, data)) + + vk3 = VerifyingKey.from_string(sk.get_verifying_key().to_string(), + curve=NIST256p) + self.assertTrue(vk3.verify(sig, data, hashfunc=sha256)) + + def test_public_key_recovery(self): + # Create keys + curve = NIST256p + + sk = SigningKey.generate(curve=curve) + vk = sk.get_verifying_key() + + # Sign a message + data = b("blahblah") + signature = sk.sign(data) + + # Recover verifying keys + recovered_vks = VerifyingKey.from_public_key_recovery(signature, data, curve) + + # Test if each pk is valid + for recovered_vk in recovered_vks: + # Test if recovered vk is valid for the data + self.assertTrue(recovered_vk.verify(signature, data)) + + # Test if properties are equal + self.assertEqual(vk.curve, recovered_vk.curve) + self.assertEqual(vk.default_hashfunc, recovered_vk.default_hashfunc) + + # Test if original vk is the list of recovered keys + self.assertTrue( + vk.pubkey.point in [recovered_vk.pubkey.point for recovered_vk in recovered_vks]) + + def test_public_key_recovery_with_custom_hash(self): + # Create keys + curve = NIST256p + + sk = SigningKey.generate(curve=curve, hashfunc=sha256) + vk = sk.get_verifying_key() + + # Sign a message + data = b("blahblah") + signature = sk.sign(data) + + # Recover verifying keys + recovered_vks = VerifyingKey.\ + from_public_key_recovery(signature, data, curve, + hashfunc=sha256) + + # Test if each pk is valid + for recovered_vk in recovered_vks: + # Test if recovered vk is valid for the data + self.assertTrue(recovered_vk.verify(signature, data)) + + # Test if properties are equal + self.assertEqual(vk.curve, recovered_vk.curve) + self.assertEqual(sha256, recovered_vk.default_hashfunc) + + # Test if original vk is the list of recovered keys + self.assertTrue(vk.pubkey.point in + [recovered_vk.pubkey.point for recovered_vk in recovered_vks]) + + def test_encoding(self): + sk = SigningKey.from_secret_exponent(123456789) + vk = sk.verifying_key + + exp = b('\x0c\xe0\x1d\xe0d\x1c\x8eS\x8a\xc0\x9eK\xa8x !\xd5\xc2\xc3' + '\xfd\xc8\xa0c\xff\xfb\x02\xb9\xc4\x84)\x1a\x0f\x8b\x87\xa4' + 'z\x8a#\xb5\x97\xecO\xb6\xa0HQ\x89*') + self.assertEqual(vk.to_string(), exp) + self.assertEqual(vk.to_string('raw'), exp) + self.assertEqual(vk.to_string('uncompressed'), b('\x04') + exp) + self.assertEqual(vk.to_string('compressed'), b('\x02') + exp[:24]) + self.assertEqual(vk.to_string('hybrid'), b('\x06') + exp) + + def test_decoding(self): + sk = SigningKey.from_secret_exponent(123456789) + vk = sk.verifying_key + + enc = b('\x0c\xe0\x1d\xe0d\x1c\x8eS\x8a\xc0\x9eK\xa8x !\xd5\xc2\xc3' + '\xfd\xc8\xa0c\xff\xfb\x02\xb9\xc4\x84)\x1a\x0f\x8b\x87\xa4' + 'z\x8a#\xb5\x97\xecO\xb6\xa0HQ\x89*') + + from_raw = VerifyingKey.from_string(enc) + self.assertEqual(from_raw.pubkey.point, vk.pubkey.point) + + from_uncompressed = VerifyingKey.from_string(b('\x04') + enc) + self.assertEqual(from_uncompressed.pubkey.point, vk.pubkey.point) + + from_compressed = VerifyingKey.from_string(b('\x02') + enc[:24]) + self.assertEqual(from_compressed.pubkey.point, vk.pubkey.point) + + from_uncompressed = VerifyingKey.from_string(b('\x06') + enc) + self.assertEqual(from_uncompressed.pubkey.point, vk.pubkey.point) + + def test_decoding_with_malformed_uncompressed(self): + enc = b('\x0c\xe0\x1d\xe0d\x1c\x8eS\x8a\xc0\x9eK\xa8x !\xd5\xc2\xc3' + '\xfd\xc8\xa0c\xff\xfb\x02\xb9\xc4\x84)\x1a\x0f\x8b\x87\xa4' + 'z\x8a#\xb5\x97\xecO\xb6\xa0HQ\x89*') + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x02') + enc) + + def test_decoding_with_malformed_compressed(self): + enc = b('\x0c\xe0\x1d\xe0d\x1c\x8eS\x8a\xc0\x9eK\xa8x !\xd5\xc2\xc3' + '\xfd\xc8\xa0c\xff\xfb\x02\xb9\xc4\x84)\x1a\x0f\x8b\x87\xa4' + 'z\x8a#\xb5\x97\xecO\xb6\xa0HQ\x89*') + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x01') + enc[:24]) + + def test_decoding_with_inconsistent_hybrid(self): + enc = b('\x0c\xe0\x1d\xe0d\x1c\x8eS\x8a\xc0\x9eK\xa8x !\xd5\xc2\xc3' + '\xfd\xc8\xa0c\xff\xfb\x02\xb9\xc4\x84)\x1a\x0f\x8b\x87\xa4' + 'z\x8a#\xb5\x97\xecO\xb6\xa0HQ\x89*') + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x07') + enc) + + def test_decoding_with_point_not_on_curve(self): + enc = b('\x0c\xe0\x1d\xe0d\x1c\x8eS\x8a\xc0\x9eK\xa8x !\xd5\xc2\xc3' + '\xfd\xc8\xa0c\xff\xfb\x02\xb9\xc4\x84)\x1a\x0f\x8b\x87\xa4' + 'z\x8a#\xb5\x97\xecO\xb6\xa0HQ\x89*') + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(enc[:47] + b('\x00')) + + def test_decoding_with_point_at_infinity(self): + # decoding it is unsupported, as it's not necessary to encode it + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x00')) + + def test_not_lying_on_curve(self): + enc = number_to_string(NIST192p.curve.p(), NIST192p.curve.p()+1) + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x02') + enc) + + def test_from_string_with_invalid_curve_too_short_ver_key_len(self): + # both verifying_key_length and baselen are calculated internally + # by the Curve constructor, but since we depend on them verify + # that inconsistent values are detected + curve = Curve("test", ecdsa.curve_192, ecdsa.generator_192, (1, 2)) + curve.verifying_key_length = 16 + curve.baselen = 32 + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x00')*16, curve) + + def test_from_string_with_invalid_curve_too_long_ver_key_len(self): + # both verifying_key_length and baselen are calculated internally + # by the Curve constructor, but since we depend on them verify + # that inconsistent values are detected + curve = Curve("test", ecdsa.curve_192, ecdsa.generator_192, (1, 2)) + curve.verifying_key_length = 16 + curve.baselen = 16 + + with self.assertRaises(MalformedPointError): + VerifyingKey.from_string(b('\x00')*16, curve) + + +@pytest.mark.parametrize("val,even", + [(i, j) for i in range(256) for j in [True, False]]) +def test_VerifyingKey_decode_with_small_values(val, even): + enc = number_to_string(val, NIST192p.order) + + if even: + enc = b('\x02') + enc + else: + enc = b('\x03') + enc + + # small values can both be actual valid public keys and not, verify that + # only expected exceptions are raised if they are not + try: + vk = VerifyingKey.from_string(enc) + assert isinstance(vk, VerifyingKey) + except MalformedPointError: + assert True + + +params = [] +for curve in curves: + for enc in ["raw", "uncompressed", "compressed", "hybrid"]: + params.append(pytest.param(curve, enc, id="{0}-{1}".format( + curve.name, enc))) + + +@pytest.mark.parametrize("curve,encoding", params) +def test_VerifyingKey_encode_decode(curve, encoding): + sk = SigningKey.generate(curve=curve) + vk = sk.verifying_key + + encoded = vk.to_string(encoding) + + from_enc = VerifyingKey.from_string(encoded, curve=curve) + + assert vk.pubkey.point == from_enc.pubkey.point + + +class OpenSSL(unittest.TestCase): + # test interoperability with OpenSSL tools. Note that openssl's ECDSA + # sign/verify arguments changed between 0.9.8 and 1.0.0: the early + # versions require "-ecdsa-with-SHA1", the later versions want just + # "-SHA1" (or to leave out that argument entirely, which means the + # signature will use some default digest algorithm, probably determined + # by the key, probably always SHA1). + # + # openssl ecparam -name secp224r1 -genkey -out privkey.pem + # openssl ec -in privkey.pem -text -noout # get the priv/pub keys + # openssl dgst -ecdsa-with-SHA1 -sign privkey.pem -out data.sig data.txt + # openssl asn1parse -in data.sig -inform DER + # data.sig is 64 bytes, probably 56b plus ASN1 overhead + # openssl dgst -ecdsa-with-SHA1 -prverify privkey.pem -signature data.sig data.txt ; echo $? + # openssl ec -in privkey.pem -pubout -out pubkey.pem + # openssl ec -in privkey.pem -pubout -outform DER -out pubkey.der + + OPENSSL_SUPPORTED_CURVES = set(c.split(':')[0].strip() for c in + run_openssl("ecparam -list_curves") + .split('\n')) + + def get_openssl_messagedigest_arg(self, hash_name): + v = run_openssl("version") + # e.g. "OpenSSL 1.0.0 29 Mar 2010", or "OpenSSL 1.0.0a 1 Jun 2010", + # or "OpenSSL 0.9.8o 01 Jun 2010" + vs = v.split()[1].split(".") + if vs >= ["1", "0", "0"]: # pragma: no cover + return "-{0}".format(hash_name) + else: # pragma: no cover + return "-ecdsa-with-{0}".format(hash_name) + + # sk: 1:OpenSSL->python 2:python->OpenSSL + # vk: 3:OpenSSL->python 4:python->OpenSSL + # sig: 5:OpenSSL->python 6:python->OpenSSL + + @pytest.mark.skipif("prime192v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime192v1") + def test_from_openssl_nist192p(self): + return self.do_test_from_openssl(NIST192p) + + @pytest.mark.skipif("prime192v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime192v1") + def test_from_openssl_nist192p_sha256(self): + return self.do_test_from_openssl(NIST192p, "SHA256") + + @pytest.mark.skipif("secp224r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp224r1") + def test_from_openssl_nist224p(self): + return self.do_test_from_openssl(NIST224p) + + @pytest.mark.skipif("prime256v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime256v1") + def test_from_openssl_nist256p(self): + return self.do_test_from_openssl(NIST256p) + + @pytest.mark.skipif("prime256v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime256v1") + def test_from_openssl_nist256p_sha384(self): + return self.do_test_from_openssl(NIST256p, "SHA384") + + @pytest.mark.skipif("prime256v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime256v1") + def test_from_openssl_nist256p_sha512(self): + return self.do_test_from_openssl(NIST256p, "SHA512") + + @pytest.mark.skipif("secp384r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp384r1") + def test_from_openssl_nist384p(self): + return self.do_test_from_openssl(NIST384p) + + @pytest.mark.skipif("secp521r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp521r1") + def test_from_openssl_nist521p(self): + return self.do_test_from_openssl(NIST521p) + + @pytest.mark.skipif("secp256k1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp256k1") + def test_from_openssl_secp256k1(self): + return self.do_test_from_openssl(SECP256k1) + + @pytest.mark.skipif("brainpoolP160r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP160r1") + def test_from_openssl_brainpoolp160r1(self): + return self.do_test_from_openssl(BRAINPOOLP160r1) + + @pytest.mark.skipif("brainpoolP192r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP192r1") + def test_from_openssl_brainpoolp192r1(self): + return self.do_test_from_openssl(BRAINPOOLP192r1) + + @pytest.mark.skipif("brainpoolP224r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP224r1") + def test_from_openssl_brainpoolp224r1(self): + return self.do_test_from_openssl(BRAINPOOLP224r1) + + @pytest.mark.skipif("brainpoolP256r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP256r1") + def test_from_openssl_brainpoolp256r1(self): + return self.do_test_from_openssl(BRAINPOOLP256r1) + + @pytest.mark.skipif("brainpoolP320r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP320r1") + def test_from_openssl_brainpoolp320r1(self): + return self.do_test_from_openssl(BRAINPOOLP320r1) + + @pytest.mark.skipif("brainpoolP384r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP384r1") + def test_from_openssl_brainpoolp384r1(self): + return self.do_test_from_openssl(BRAINPOOLP384r1) + + @pytest.mark.skipif("brainpoolP512r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP512r1") + def test_from_openssl_brainpoolp512r1(self): + return self.do_test_from_openssl(BRAINPOOLP512r1) + + def do_test_from_openssl(self, curve, hash_name="SHA1"): + curvename = curve.openssl_name + assert curvename + # OpenSSL: create sk, vk, sign. + # Python: read vk(3), checksig(5), read sk(1), sign, check + mdarg = self.get_openssl_messagedigest_arg(hash_name) + if os.path.isdir("t"): # pragma: no cover + shutil.rmtree("t") + os.mkdir("t") + run_openssl("ecparam -name %s -genkey -out t/privkey.pem" % curvename) + run_openssl("ec -in t/privkey.pem -pubout -out t/pubkey.pem") + data = b("data") + with open("t/data.txt", "wb") as e: + e.write(data) + run_openssl("dgst %s -sign t/privkey.pem -out t/data.sig t/data.txt" % mdarg) + run_openssl("dgst %s -verify t/pubkey.pem -signature t/data.sig t/data.txt" % mdarg) + with open("t/pubkey.pem", "rb") as e: + pubkey_pem = e.read() + vk = VerifyingKey.from_pem(pubkey_pem) # 3 + with open("t/data.sig", "rb") as e: + sig_der = e.read() + self.assertTrue(vk.verify(sig_der, data, # 5 + hashfunc=partial(hashlib.new, hash_name), + sigdecode=sigdecode_der)) + + with open("t/privkey.pem") as e: + fp = e.read() + sk = SigningKey.from_pem(fp) # 1 + sig = sk.sign( + data, + hashfunc=partial(hashlib.new, hash_name), + ) + self.assertTrue(vk.verify(sig, + data, + hashfunc=partial(hashlib.new, hash_name))) + + @pytest.mark.skipif("prime192v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime192v1") + def test_to_openssl_nist192p(self): + self.do_test_to_openssl(NIST192p) + + @pytest.mark.skipif("prime192v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime192v1") + def test_to_openssl_nist192p_sha256(self): + self.do_test_to_openssl(NIST192p, "SHA256") + + @pytest.mark.skipif("secp224r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp224r1") + def test_to_openssl_nist224p(self): + self.do_test_to_openssl(NIST224p) + + @pytest.mark.skipif("prime256v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime256v1") + def test_to_openssl_nist256p(self): + self.do_test_to_openssl(NIST256p) + + @pytest.mark.skipif("prime256v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime256v1") + def test_to_openssl_nist256p_sha384(self): + self.do_test_to_openssl(NIST256p, "SHA384") + + @pytest.mark.skipif("prime256v1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support prime256v1") + def test_to_openssl_nist256p_sha512(self): + self.do_test_to_openssl(NIST256p, "SHA512") + + @pytest.mark.skipif("secp384r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp384r1") + def test_to_openssl_nist384p(self): + self.do_test_to_openssl(NIST384p) + + @pytest.mark.skipif("secp521r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp521r1") + def test_to_openssl_nist521p(self): + self.do_test_to_openssl(NIST521p) + + @pytest.mark.skipif("secp256k1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support secp256k1") + def test_to_openssl_secp256k1(self): + self.do_test_to_openssl(SECP256k1) + + @pytest.mark.skipif("brainpoolP160r1" not in OPENSSL_SUPPORTED_CURVES, + reason="system openssl does not support brainpoolP160r1") + def test_to_openssl_brainpoolp160r1(se |