1 files changed, 28 insertions, 21 deletions

diff --git a/test/aes256ecb_decrypt.c b/test/aes256ecb_decrypt.c
index 82bf353..c4ae001 100644
--- a/test/aes256ecb_decrypt.c
+++ b/test/aes256ecb_decrypt.c
@@ -10,40 +10,47 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
-static void exit_with_usage(const char* argv0)
+static void exit_with_usage()
 {
-    printf("Usage: %s KEY [CIPHER...]\n", argv0);
+    puts("Usage: aes256ecb_decrypt.exe KEY0 [CIPHER0...] [-- KEY1 [CIPHER1...]...]");
     exit(EXIT_FAILURE);
 }
 
 int main(int argc, char** argv)
 {
-    AesBlock128 plain, cipher;
-    AesBlock256 key;
-    Aes256KeySchedule key_schedule, inverted_schedule;
+    for (--argc, ++argv; argc > -1; --argc, ++argv)
+    {
+        AesBlock128 plain, cipher;
+        AesBlock256 key;
+        Aes256KeySchedule key_schedule, inverted_schedule;
 
-    if (argc < 2)
-        exit_with_usage(argv[0]);
+        if (argc < 1)
+            exit_with_usage();
 
-    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_block256(&key, *argv) != 0)
+        {
+            fprintf(stderr, "Invalid 256-bit AES block '%s'\n", *argv);
+            exit_with_usage();
+        }
 
-    aes256_expand_key_schedule(&key, &key_schedule);
-    aes256_invert_key_schedule(&key_schedule, &inverted_schedule);
+        aes256_expand_key_schedule(&key, &key_schedule);
+        aes256_invert_key_schedule(&key_schedule, &inverted_schedule);
 
-    for (int i = 2; i < argc; ++i)
-    {
-        if (parse_aes_block128(&cipher, argv[i]) != 0)
+        for (--argc, ++argv; argc > 0; --argc, ++argv)
         {
-            fprintf(stderr, "Invalid 128-bit AES block '%s'\n", argv[i]);
-            continue;
+            if (strcmp("--", *argv) == 0)
+                break;
+
+            if (parse_aes_block128(&cipher, *argv) != 0)
+            {
+                fprintf(stderr, "Invalid 128-bit AES block '%s'\n", *argv);
+                continue;
+            }
+            plain = aes256ecb_decrypt(cipher, &inverted_schedule);
+            print_aes_block128(&plain);
         }
-        plain = aes256ecb_decrypt(cipher, &inverted_schedule);
-        print_aes_block128(&plain);
     }
 
     return 0;