add CTR mode

1 files changed, 51 insertions, 0 deletions

diff --git a/examples/aes128ctr_example.c b/examples/aes128ctr_example.c
new file mode 100644
index 0000000..b0d38ff
--- /dev/null
+++ b/examples/aes128ctr_example.c
@@ -0,0 +1,51 @@
+/**
+ * \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>
+
+int main()
+{
+    __declspec(align(16)) AesBlock128 plain, key, cypher, decrypted, iv;
+    __declspec(align(16)) Aes128KeySchedule key_schedule;
+
+    plain = make_aes_block128(0xffeeddcc, 0xbbaa9988, 0x77665544, 0x33221100);
+    key = make_aes_block128(0x0f0e0d0c, 0x0b0a0908, 0x07060504, 0x03020100);
+    iv = make_aes_block128(0xfedcba98, 0x76543210, 0xfedcba98, 0x76543210);
+
+    printf("Plain: %s\n", format_aes_block128(&plain).str);
+    print_aes_block128_fips_matrix_style(&plain);
+
+    printf("\n");
+    printf("Key: %s\n", format_aes_block128(&key).str);
+    print_aes_block128_fips_matrix_style(&key);
+
+    printf("\n");
+    printf("Initialization vector: %s\n", format_aes_block128(&iv).str);
+    print_aes_block128_fips_matrix_style(&iv);
+
+    aes128_expand_key_schedule(key, &key_schedule);
+
+    printf("\n");
+    printf("Key schedule:\n");
+    for (int i = 0; i < 11; ++i)
+        printf("\t[%d]: %s\n", i, format_aes_block128(&key_schedule.keys[i]).str);
+
+    cypher = aes128ctr_encrypt(plain, &key_schedule, iv, 0);
+    printf("\n");
+    printf("Cypher: %s\n", format_aes_block128(&cypher).str);
+    print_aes_block128_fips_matrix_style(&cypher);
+
+    decrypted = aes128ctr_decrypt(cypher, &key_schedule, iv, 0);
+    printf("\n");
+    printf("Decrypted: %s\n", format_aes_block128(&decrypted).str);
+    print_aes_block128_fips_matrix_style(&decrypted);
+
+    return 0;
+}