diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/test_utils.py | 30 | ||||
| -rw-r--r-- | tests/utils.py | 17 |
2 files changed, 42 insertions, 5 deletions
diff --git a/tests/test_utils.py b/tests/test_utils.py index 7a0b9e74..4673b49e 100644 --- a/tests/test_utils.py +++ b/tests/test_utils.py @@ -27,11 +27,11 @@ from cryptography.exceptions import UnsupportedAlgorithm, _Reasons import cryptography_vectors from .utils import ( - check_backend_support, check_for_iface, load_cryptrec_vectors, - load_fips_dsa_key_pair_vectors, load_fips_dsa_sig_vectors, - load_fips_ecdsa_key_pair_vectors, load_fips_ecdsa_signing_vectors, - load_hash_vectors, load_nist_vectors, load_pkcs1_vectors, - load_rsa_nist_vectors, load_vectors_from_file, + check_backend_support, check_for_iface, der_encode_dsa_signature, + load_cryptrec_vectors, load_fips_dsa_key_pair_vectors, + load_fips_dsa_sig_vectors, load_fips_ecdsa_key_pair_vectors, + load_fips_ecdsa_signing_vectors, load_hash_vectors, load_nist_vectors, + load_pkcs1_vectors, load_rsa_nist_vectors, load_vectors_from_file, raises_unsupported_algorithm, select_backends ) @@ -125,6 +125,26 @@ def test_check_backend_support_no_backend(): check_backend_support(item) +def test_der_encode_dsa_signature_values(): + sig = der_encode_dsa_signature(1, 1) + assert sig == b"0\x06\x02\x01\x01\x02\x01\x01" + + sig2 = der_encode_dsa_signature( + 1037234182290683143945502320610861668562885151617, + 559776156650501990899426031439030258256861634312 + ) + assert sig2 == ( + b'0-\x02\x15\x00\xb5\xaf0xg\xfb\x8bT9\x00\x13\xccg\x02\r\xdf\x1f,\x0b' + b'\x81\x02\x14b\r;"\xabP1D\x0c>5\xea\xb6\xf4\x81)\x8f\x9e\x9f\x08' + ) + + sig3 = der_encode_dsa_signature(0, 0) + assert sig3 == b"0\x06\x02\x01\x00\x02\x01\x00" + + sig4 = der_encode_dsa_signature(-1, 0) + assert sig4 == b"0\x06\x02\x01\xFF\x02\x01\x00" + + def test_load_nist_vectors(): vector_data = textwrap.dedent(""" # CAVS 11.1 diff --git a/tests/utils.py b/tests/utils.py index 60b6f5a2..5c0e2343 100644 --- a/tests/utils.py +++ b/tests/utils.py @@ -18,6 +18,9 @@ import collections import re from contextlib import contextmanager +from pyasn1.codec.der import encoder +from pyasn1.type import namedtype, univ + import pytest import six @@ -80,6 +83,20 @@ def raises_unsupported_algorithm(reason): assert exc_info.value._reason is reason +class _DSSSigValue(univ.Sequence): + componentType = namedtype.NamedTypes( + namedtype.NamedType('r', univ.Integer()), + namedtype.NamedType('s', univ.Integer()) + ) + + +def der_encode_dsa_signature(r, s): + sig = _DSSSigValue() + sig.setComponentByName('r', r) + sig.setComponentByName('s', s) + return encoder.encode(sig) + + def load_vectors_from_file(filename, loader): with cryptography_vectors.open_vector_file(filename) as vector_file: return loader(vector_file) |