add SEED docs, tests, small fixes

2 files changed, 103 insertions, 1 deletions

diff --git a/tests/hazmat/primitives/test_ciphers.py b/tests/hazmat/primitives/test_ciphers.py
index 9f8123eb..99ef043a 100644
--- a/tests/hazmat/primitives/test_ciphers.py
+++ b/tests/hazmat/primitives/test_ciphers.py
@@ -20,7 +20,7 @@ import pytest
 from cryptography.exceptions import _Reasons
 from cryptography.hazmat.primitives import ciphers
 from cryptography.hazmat.primitives.ciphers.algorithms import (
-    AES, ARC4, Blowfish, CAST5, Camellia, IDEA, TripleDES
+    AES, ARC4, Blowfish, CAST5, Camellia, IDEA, SEED, TripleDES
 )
 from cryptography.hazmat.primitives.ciphers.modes import ECB
 
@@ -127,6 +127,16 @@ class TestIDEA(object):
             IDEA(b"\x00" * 17)
 
 
+class TestSEED(object):
+    def test_key_size(self):
+        cipher = SEED(b"\x00" * 16)
+        assert cipher.key_size == 128
+
+    def test_invalid_key_size(self):
+        with pytest.raises(ValueError):
+            SEED(b"\x00" * 17)
+
+
 def test_invalid_backend():
     pretend_backend = object()
 
diff --git a/tests/hazmat/primitives/test_seed.py b/tests/hazmat/primitives/test_seed.py
new file mode 100644
index 00000000..35f89e56
--- /dev/null
+++ b/tests/hazmat/primitives/test_seed.py
@@ -0,0 +1,92 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from __future__ import absolute_import, division, print_function
+
+import binascii
+import os
+
+import pytest
+
+from cryptography.hazmat.primitives.ciphers import algorithms, modes
+
+from .utils import generate_encrypt_test
+from ...utils import load_nist_vectors
+
+
+@pytest.mark.supported(
+    only_if=lambda backend: backend.cipher_supported(
+        algorithms.SEED("\x00" * 16), modes.ECB()
+    ),
+    skip_message="Does not support SEED ECB",
+)
+@pytest.mark.cipher
+class TestSEEDModeECB(object):
+    test_ECB = generate_encrypt_test(
+        load_nist_vectors,
+        os.path.join("ciphers", "SEED"),
+        ["rfc-4269.txt"],
+        lambda key, **kwargs: algorithms.SEED(binascii.unhexlify((key))),
+        lambda **kwargs: modes.ECB(),
+    )
+
+
+@pytest.mark.supported(
+    only_if=lambda backend: backend.cipher_supported(
+        algorithms.SEED("\x00" * 16), modes.CBC("\x00" * 16)
+    ),
+    skip_message="Does not support SEED CBC",
+)
+@pytest.mark.cipher
+class TestSEEDModeCBC(object):
+    test_CBC = generate_encrypt_test(
+        load_nist_vectors,
+        os.path.join("ciphers", "SEED"),
+        ["rfc-4196.txt"],
+        lambda key, **kwargs: algorithms.SEED(binascii.unhexlify((key))),
+        lambda iv, **kwargs: modes.CBC(binascii.unhexlify(iv))
+    )
+
+
+@pytest.mark.supported(
+    only_if=lambda backend: backend.cipher_supported(
+        algorithms.SEED("\x00" * 16), modes.OFB("\x00" * 16)
+    ),
+    skip_message="Does not support SEED OFB",
+)
+@pytest.mark.cipher
+class TestSEEDModeOFB(object):
+    test_OFB = generate_encrypt_test(
+        load_nist_vectors,
+        os.path.join("ciphers", "SEED"),
+        ["seed-ofb.txt"],
+        lambda key, **kwargs: algorithms.SEED(binascii.unhexlify((key))),
+        lambda iv, **kwargs: modes.OFB(binascii.unhexlify(iv))
+    )
+
+
+@pytest.mark.supported(
+    only_if=lambda backend: backend.cipher_supported(
+        algorithms.SEED("\x00" * 16), modes.CFB("\x00" * 16)
+    ),
+    skip_message="Does not support SEED CFB",
+)
+@pytest.mark.cipher
+class TestSEEDModeCFB(object):
+    test_CFB = generate_encrypt_test(
+        load_nist_vectors,
+        os.path.join("ciphers", "SEED"),
+        ["seed-cfb.txt"],
+        lambda key, **kwargs: algorithms.SEED(binascii.unhexlify((key))),
+        lambda iv, **kwargs: modes.CFB(binascii.unhexlify(iv))
+    )