Merge pull request #904 from reaperhulk/seed-bespoke-vectors

add SEED CFB/OFB bespoke vectors and documentation

1 files changed, 35 insertions, 0 deletions

diff --git a/docs/development/custom-vectors/seed/verify_seed.py b/docs/development/custom-vectors/seed/verify_seed.py
new file mode 100644
index 00000000..e626428c
--- /dev/null
+++ b/docs/development/custom-vectors/seed/verify_seed.py
@@ -0,0 +1,35 @@
+import binascii
+
+import botan
+
+from tests.utils import load_nist_vectors
+
+
+def encrypt(mode, key, iv, plaintext):
+    encryptor = botan.Cipher("SEED/{0}/NoPadding".format(mode), "encrypt",
+                             binascii.unhexlify(key))
+
+    cipher_text = encryptor.cipher(binascii.unhexlify(plaintext),
+                                   binascii.unhexlify(iv))
+    return binascii.hexlify(cipher_text)
+
+
+def verify_vectors(mode, filename):
+    with open(filename, "r") as f:
+        vector_file = f.read().splitlines()
+
+    vectors = load_nist_vectors(vector_file)
+    for vector in vectors:
+        ct = encrypt(
+            mode,
+            vector["key"],
+            vector["iv"],
+            vector["plaintext"]
+        )
+        assert ct == vector["ciphertext"]
+
+
+ofb_path = "vectors/cryptography_vectors/ciphers/SEED/seed-ofb.txt"
+verify_vectors("OFB", ofb_path)
+cfb_path = "vectors/cryptography_vectors/ciphers/SEED/seed-cfb.txt"
+verify_vectors("CFB", cfb_path)