From 1bd0b66128ab1b2b2cd6476fd378a6e304a769be Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Wed, 3 Jun 2015 22:36:04 +0300
Subject: add OFB mode

---
 test/aes256ofb_encrypt_block.c | 56 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 test/aes256ofb_encrypt_block.c

(limited to 'test/aes256ofb_encrypt_block.c')

diff --git a/test/aes256ofb_encrypt_block.c b/test/aes256ofb_encrypt_block.c
new file mode 100644
index 0000000..4498bc8
--- /dev/null
+++ b/test/aes256ofb_encrypt_block.c
@@ -0,0 +1,56 @@
+/**
+ * \file
+ * \author Egor Tensin <Egor.Tensin@gmail.com>
+ * \date 2015
+ * \copyright This file is licensed under the terms of the MIT License.
+ *            See LICENSE.txt for details.
+ */
+
+#include <aesni/all.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static void exit_with_usage(const char* argv0)
+{
+    printf("Usage: %s KEY INIT_VECTOR [PLAIN...]\n", argv0);
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char** argv)
+{
+    __declspec(align(16)) AesBlock128 plain, cipher, iv;
+    __declspec(align(16)) AesBlock256 key;
+    __declspec(align(16)) Aes256KeySchedule key_schedule;
+
+    if (argc < 3)
+        exit_with_usage(argv[0]);
+
+    if (parse_aes_block256(&key, argv[1]) != 0)
+    {
+        fprintf(stderr, "Invalid 256-bit AES block '%s'\n", argv[1]);
+        exit_with_usage(argv[0]);
+    }
+
+    if (parse_aes_block128(&iv, argv[2]) != 0)
+    {
+        fprintf(stderr, "Invalid 128-bit AES block '%s'\n", argv[2]);
+        exit_with_usage(argv[0]);
+    }
+
+    aes256_expand_key_schedule(&key, &key_schedule);
+
+    for (int i = 3; i < argc; ++i)
+    {
+        if (parse_aes_block128(&plain, argv[i]) != 0)
+        {
+            fprintf(stderr, "Invalid 128-bit AES block '%s'\n", argv[i]);
+            continue;
+        }
+        cipher = aes256cfb_encrypt(plain, &key_schedule, iv);
+        iv = _mm_xor_si128(cipher, plain);
+        print_aes_block128(&cipher);
+    }
+
+    return 0;
+}
-- 
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