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authorEgor Tensin <Egor.Tensin@gmail.com>2015-05-30 05:13:44 +0300
committerEgor Tensin <Egor.Tensin@gmail.com>2015-05-30 05:13:44 +0300
commit1109190cc2edd86f12cdd16847f3e80e48dccc50 (patch)
treea688b89f7e4ede0defaeb79ffb8e8a99ece5a395 /examples/aes128cbc_example.c
parentsupport AES-{128,192}-cbc (diff)
downloadaes-tools-1109190cc2edd86f12cdd16847f3e80e48dccc50.tar.gz
aes-tools-1109190cc2edd86f12cdd16847f3e80e48dccc50.zip
detach key expansion routines
Block encryption/decryption routines now don't expand key schedules on each call.
Diffstat (limited to '')
-rw-r--r--examples/aes128cbc_example.c25
1 files changed, 23 insertions, 2 deletions
diff --git a/examples/aes128cbc_example.c b/examples/aes128cbc_example.c
index ce568ea..94fb0d4 100644
--- a/examples/aes128cbc_example.c
+++ b/examples/aes128cbc_example.c
@@ -13,6 +13,7 @@
int main()
{
__declspec(align(16)) AesBlock128 plain, key, cypher, decrypted, iv;
+ __declspec(align(16)) Aes128KeySchedule key_schedule, inverted_schedule;
plain = make_aes_block128(0xffeeddcc, 0xbbaa9988, 0x77665544, 0x33221100);
key = make_aes_block128(0x0f0e0d0c, 0x0b0a0908, 0x07060504, 0x03020100);
@@ -32,13 +33,33 @@ int main()
printf(" %s\n", format_aes_block128_fips_style(&iv).str);
print_aes_block128_fips_matrix_style(&iv);
- cypher = aes128cbc_encrypt(plain, key, &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);
+ printf("\t[%d]: %s\n", i, format_aes_block128_fips_style(&key_schedule.keys[i]).str);
+ }
+
+ cypher = aes128cbc_encrypt(plain, &key_schedule, &iv);
printf("\n");
printf("Cypher: %s\n", format_aes_block128(&cypher).str);
printf(" %s\n", format_aes_block128_fips_style(&cypher).str);
print_aes_block128_fips_matrix_style(&cypher);
- decrypted = aes128cbc_decrypt(cypher, key, &iv);
+ aes128_invert_key_schedule(&key_schedule, &inverted_schedule);
+
+ printf("\n");
+ printf("Inverted key schedule:\n");
+ for (int i = 0; i < 11; ++i)
+ {
+ printf("\t[%d]: %s\n", i, format_aes_block128(&inverted_schedule.keys[i]).str);
+ printf("\t[%d]: %s\n", i, format_aes_block128_fips_style(&inverted_schedule.keys[i]).str);
+ }
+
+ decrypted = aes128cbc_decrypt(cypher, &inverted_schedule, &iv);
printf("\n");
printf("Decrypted: %s\n", format_aes_block128(&decrypted).str);
printf(" %s\n", format_aes_block128_fips_style(&decrypted).str);