1 files changed, 63 insertions, 0 deletions
diff --git a/test/aes128ctr_decrypt_block.c b/test/aes128ctr_decrypt_block.c
new file mode 100644
index 0000000..e6f9cee
--- /dev/null
+++ b/test/aes128ctr_decrypt_block.c
@@ -0,0 +1,63 @@
+/**
+ * \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>
+#include <string.h>
+
+static void exit_with_usage()
+{
+    puts("Usage: aes128ctr_decrypt_block.exe KEY0 IV0 [CIPHER0...] [-- KEY1 IV1 [CIPHER1...]...]");
+    exit(EXIT_FAILURE);
+}
+
+int main(int argc, char** argv)
+{
+    for (--argc, ++argv; argc > -1; --argc, ++argv)
+    {
+        AesBlock128 plain, key, cipher, iv;
+        Aes128KeySchedule key_schedule;
+
+        if (argc < 2)
+            exit_with_usage();
+
+        if (parse_aes_block128(&key, *argv) != 0)
+        {
+            fprintf(stderr, "Invalid 128-bit AES block '%s'\n", *argv);
+            exit_with_usage();
+        }
+
+        if (parse_aes_block128(&iv, argv[1]) != 0)
+        {
+            fprintf(stderr, "Invalid 128-bit AES block '%s'\n", argv[1]);
+            exit_with_usage();
+        }
+
+        aes128_expand_key_schedule(key, &key_schedule);
+
+        int ctr = 0;
+
+        for (argc -= 2, argv += 2; argc > 0; --argc, ++argv)
+        {
+            if (strcmp("--", *argv) == 0)
+                break;
+
+            if (parse_aes_block128(&cipher, *argv) != 0)
+            {
+                fprintf(stderr, "Invalid 128-bit AES block '%s'\n", *argv);
+                continue;
+            }
+            plain = aes128ctr_decrypt_block(cipher, &key_schedule, iv, ctr++);
+            print_aes_block128(&plain);
+        }
+    }
+
+    return 0;
+}