diff options
Diffstat (limited to 'tests/hazmat/primitives/test_ed25519.py')
| -rw-r--r-- | tests/hazmat/primitives/test_ed25519.py | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/tests/hazmat/primitives/test_ed25519.py b/tests/hazmat/primitives/test_ed25519.py new file mode 100644 index 00000000..8a2d3b07 --- /dev/null +++ b/tests/hazmat/primitives/test_ed25519.py @@ -0,0 +1,229 @@ +# This file is dual licensed under the terms of the Apache License, Version +# 2.0, and the BSD License. See the LICENSE file in the root of this repository +# for complete details. + +from __future__ import absolute_import, division, print_function + +import binascii +import os + +import pytest + +from cryptography.exceptions import InvalidSignature, _Reasons +from cryptography.hazmat.backends.interfaces import DHBackend +from cryptography.hazmat.primitives import serialization +from cryptography.hazmat.primitives.asymmetric.ed25519 import ( + Ed25519PrivateKey, Ed25519PublicKey +) + +from ...utils import ( + load_vectors_from_file, raises_unsupported_algorithm +) + + +def load_ed25519_vectors(vector_data): + """ + djb's ed25519 vectors are structured as a colon delimited array: + 0: secret key (32 bytes) + public key (32 bytes) + 1: public key (32 bytes) + 2: message (0+ bytes) + 3: signature + message (64+ bytes) + """ + data = [] + for line in vector_data: + secret_key, public_key, message, signature, _ = line.split(':') + secret_key = secret_key[0:64] + signature = signature[0:128] + data.append({ + "secret_key": secret_key, + "public_key": public_key, + "message": message, + "signature": signature + }) + return data + + +@pytest.mark.supported( + only_if=lambda backend: not backend.ed25519_supported(), + skip_message="Requires OpenSSL without Ed25519 support" +) +@pytest.mark.requires_backend_interface(interface=DHBackend) +def test_ed25519_unsupported(backend): + with raises_unsupported_algorithm( + _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM + ): + Ed25519PublicKey.from_public_bytes(b"0" * 32) + + with raises_unsupported_algorithm( + _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM + ): + Ed25519PrivateKey.from_private_bytes(b"0" * 32) + + with raises_unsupported_algorithm( + _Reasons.UNSUPPORTED_PUBLIC_KEY_ALGORITHM + ): + Ed25519PrivateKey.generate() + + +@pytest.mark.supported( + only_if=lambda backend: backend.ed25519_supported(), + skip_message="Requires OpenSSL with Ed25519 support" +) +@pytest.mark.requires_backend_interface(interface=DHBackend) +class TestEd25519Signing(object): + @pytest.mark.parametrize( + "vector", + load_vectors_from_file( + os.path.join("asymmetric", "Ed25519", "sign.input"), + load_ed25519_vectors + ) + ) + def test_sign_verify_input(self, vector, backend): + sk = binascii.unhexlify(vector["secret_key"]) + pk = binascii.unhexlify(vector["public_key"]) + message = binascii.unhexlify(vector["message"]) + signature = binascii.unhexlify(vector["signature"]) + private_key = Ed25519PrivateKey.from_private_bytes(sk) + computed_sig = private_key.sign(message) + assert computed_sig == signature + public_key = private_key.public_key() + assert public_key.public_bytes( + serialization.Encoding.Raw, serialization.PublicFormat.Raw + ) == pk + public_key.verify(signature, message) + + def test_invalid_signature(self, backend): + key = Ed25519PrivateKey.generate() + signature = key.sign(b"test data") + with pytest.raises(InvalidSignature): + key.public_key().verify(signature, b"wrong data") + + with pytest.raises(InvalidSignature): + key.public_key().verify(b"0" * 64, b"test data") + + def test_generate(self, backend): + key = Ed25519PrivateKey.generate() + assert key + assert key.public_key() + + def test_load_public_bytes(self, backend): + public_key = Ed25519PrivateKey.generate().public_key() + public_bytes = public_key.public_bytes( + serialization.Encoding.Raw, serialization.PublicFormat.Raw + ) + public_key2 = Ed25519PublicKey.from_public_bytes(public_bytes) + assert public_bytes == public_key2.public_bytes( + serialization.Encoding.Raw, serialization.PublicFormat.Raw + ) + + def test_invalid_type_public_bytes(self, backend): + with pytest.raises(TypeError): + Ed25519PublicKey.from_public_bytes(object()) + + def test_invalid_type_private_bytes(self, backend): + with pytest.raises(TypeError): + Ed25519PrivateKey.from_private_bytes(object()) + + def test_invalid_length_from_public_bytes(self, backend): + with pytest.raises(ValueError): + Ed25519PublicKey.from_public_bytes(b"a" * 31) + with pytest.raises(ValueError): + Ed25519PublicKey.from_public_bytes(b"a" * 33) + + def test_invalid_length_from_private_bytes(self, backend): + with pytest.raises(ValueError): + Ed25519PrivateKey.from_private_bytes(b"a" * 31) + with pytest.raises(ValueError): + Ed25519PrivateKey.from_private_bytes(b"a" * 33) + + def test_invalid_private_bytes(self, backend): + key = Ed25519PrivateKey.generate() + with pytest.raises(ValueError): + key.private_bytes( + serialization.Encoding.Raw, + serialization.PrivateFormat.Raw, + None + ) + + with pytest.raises(ValueError): + key.private_bytes( + serialization.Encoding.Raw, + serialization.PrivateFormat.PKCS8, + None + ) + + with pytest.raises(ValueError): + key.private_bytes( + serialization.Encoding.PEM, + serialization.PrivateFormat.Raw, + serialization.NoEncryption() + ) + + def test_invalid_public_bytes(self, backend): + key = Ed25519PrivateKey.generate().public_key() + with pytest.raises(ValueError): + key.public_bytes( + serialization.Encoding.Raw, + serialization.PublicFormat.SubjectPublicKeyInfo + ) + + with pytest.raises(ValueError): + key.public_bytes( + serialization.Encoding.PEM, + serialization.PublicFormat.PKCS1 + ) + + with pytest.raises(ValueError): + key.public_bytes( + serialization.Encoding.PEM, + serialization.PublicFormat.Raw + ) + + @pytest.mark.parametrize( + ("encoding", "fmt", "encryption", "passwd", "load_func"), + [ + ( + serialization.Encoding.PEM, + serialization.PrivateFormat.PKCS8, + serialization.BestAvailableEncryption(b"password"), + b"password", + serialization.load_pem_private_key + ), + ( + serialization.Encoding.DER, + serialization.PrivateFormat.PKCS8, + serialization.BestAvailableEncryption(b"password"), + b"password", + serialization.load_der_private_key + ), + ( + serialization.Encoding.PEM, + serialization.PrivateFormat.PKCS8, + serialization.NoEncryption(), + None, + serialization.load_pem_private_key + ), + ( + serialization.Encoding.DER, + serialization.PrivateFormat.PKCS8, + serialization.NoEncryption(), + None, + serialization.load_der_private_key + ), + ] + ) + def test_round_trip_private_serialization(self, encoding, fmt, encryption, + passwd, load_func, backend): + key = Ed25519PrivateKey.generate() + serialized = key.private_bytes(encoding, fmt, encryption) + loaded_key = load_func(serialized, passwd, backend) + assert isinstance(loaded_key, Ed25519PrivateKey) + + def test_buffer_protocol(self, backend): + private_bytes = os.urandom(32) + key = Ed25519PrivateKey.from_private_bytes(bytearray(private_bytes)) + assert key.private_bytes( + serialization.Encoding.Raw, + serialization.PrivateFormat.Raw, + serialization.NoEncryption() + ) == private_bytes |