add output feedback mode support + test vectors (aes)
diff --git a/tests/primitives/test_nist.py b/tests/primitives/test_nist.py
index 3dc8277..0e16cc9 100644
--- a/tests/primitives/test_nist.py
+++ b/tests/primitives/test_nist.py
@@ -133,3 +133,50 @@
actual_ciphertext = cipher.encrypt(binascii.unhexlify(plaintext))
actual_ciphertext += cipher.finalize()
assert binascii.hexlify(actual_ciphertext) == ciphertext
+
+
+class TestAES_OFB(object):
+ @parameterize_encrypt_test(
+ "AES", "KAT",
+ ("key", "iv", "plaintext", "ciphertext"),
+ [
+ "OFBGFSbox128.rsp",
+ "OFBGFSbox192.rsp",
+ "OFBGFSbox256.rsp",
+ "OFBKeySbox128.rsp",
+ "OFBKeySbox192.rsp",
+ "OFBKeySbox256.rsp",
+ "OFBVarKey128.rsp",
+ "OFBVarKey192.rsp",
+ "OFBVarKey256.rsp",
+ "OFBVarTxt128.rsp",
+ "OFBVarTxt192.rsp",
+ "OFBVarTxt256.rsp",
+ ]
+ )
+ def test_KAT(self, key, iv, plaintext, ciphertext):
+ cipher = BlockCipher(
+ ciphers.AES(binascii.unhexlify(key)),
+ modes.OFB(binascii.unhexlify(iv))
+ )
+ actual_ciphertext = cipher.encrypt(binascii.unhexlify(plaintext))
+ actual_ciphertext += cipher.finalize()
+ assert binascii.hexlify(actual_ciphertext) == ciphertext
+
+ @parameterize_encrypt_test(
+ "AES", "MMT",
+ ("key", "iv", "plaintext", "ciphertext"),
+ [
+ "OFBMMT128.rsp",
+ "OFBMMT192.rsp",
+ "OFBMMT256.rsp",
+ ]
+ )
+ def test_MMT(self, key, iv, plaintext, ciphertext):
+ cipher = BlockCipher(
+ ciphers.AES(binascii.unhexlify(key)),
+ modes.OFB(binascii.unhexlify(iv))
+ )
+ actual_ciphertext = cipher.encrypt(binascii.unhexlify(plaintext))
+ actual_ciphertext += cipher.finalize()
+ assert binascii.hexlify(actual_ciphertext) == ciphertext