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-rw-r--r--test/aes256cfb_decrypt_block.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/test/aes256cfb_decrypt_block.c b/test/aes256cfb_decrypt_block.c
new file mode 100644
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--- /dev/null
+++ b/test/aes256cfb_decrypt_block.c
@@ -0,0 +1,62 @@
+/**
+ * \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: aes256cfb_decrypt_block.exe KEY0 IV0 [CIPHERTEXT0...] [-- KEY1 IV1 [CIPHERTEXT1...]...]");
+ exit(EXIT_FAILURE);
+}
+
+int main(int argc, char** argv)
+{
+ for (--argc, ++argv; argc > -1; --argc, ++argv)
+ {
+ AesNI_Block128 plaintext, ciphertext, iv;
+ AesNI_Aes256_Key key;
+ AesNI_Aes256_RoundKeys encryption_keys;
+
+ if (argc < 2)
+ exit_with_usage();
+
+ if (aesni_is_error(aesni_aes256_parse_key(&key, *argv, NULL)))
+ {
+ fprintf(stderr, "Invalid 256-bit AES block '%s'\n", *argv);
+ exit_with_usage();
+ }
+
+ if (aesni_is_error(aesni_aes_parse_block(&iv, argv[1], NULL)))
+ {
+ fprintf(stderr, "Invalid 128-bit AES block '%s'\n", argv[1]);
+ exit_with_usage();
+ }
+
+ aesni_aes256_expand_key(&key, &encryption_keys);
+
+ for (argc -= 2, argv += 2; argc > 0; --argc, ++argv)
+ {
+ if (strcmp("--", *argv) == 0)
+ break;
+
+ if (aesni_is_error(aesni_aes_parse_block(&ciphertext, *argv, NULL)))
+ {
+ fprintf(stderr, "Invalid 128-bit AES block '%s'\n", *argv);
+ continue;
+ }
+ plaintext = aesni_aes256_decrypt_block_cfb(ciphertext, &encryption_keys, iv, &iv);
+ aesni_aes_print_block(&plaintext, NULL);
+ }
+ }
+
+ return 0;
+}