From 1109190cc2edd86f12cdd16847f3e80e48dccc50 Mon Sep 17 00:00:00 2001 From: Egor Tensin Date: Sat, 30 May 2015 05:13:44 +0300 Subject: detach key expansion routines Block encryption/decryption routines now don't expand key schedules on each call. --- examples/aes192ecb_example.c | 25 +++++++++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) (limited to 'examples/aes192ecb_example.c') diff --git a/examples/aes192ecb_example.c b/examples/aes192ecb_example.c index eb9b79d..eb3b329 100644 --- a/examples/aes192ecb_example.c +++ b/examples/aes192ecb_example.c @@ -14,6 +14,7 @@ int main() { __declspec(align(16)) AesBlock128 plain, cypher, decrypted; __declspec(align(16)) AesBlock192 key; + __declspec(align(16)) Aes192KeySchedule key_schedule, inverted_schedule; plain = make_aes_block128(0xffeeddcc, 0xbbaa9988, 0x77665544, 0x33221100); key = make_aes_block192(0x17161514, 0x13121110, 0x0f0e0d0c, 0x0b0a0908, 0x07060504, 0x03020100); @@ -27,13 +28,33 @@ int main() printf(" %s\n", format_aes_block192_fips_style(&key).str); print_aes_block192_fips_matrix_style(&key); - cypher = aes192ecb_encrypt(plain, &key); + aes192_expand_key_schedule(&key, &key_schedule); + + printf("\n"); + printf("Key schedule:\n"); + for (int i = 0; i < 13; ++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 = aes192ecb_encrypt(plain, &key_schedule); 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 = aes192ecb_decrypt(cypher, &key); + aes192_invert_key_schedule(&key_schedule, &inverted_schedule); + + printf("\n"); + printf("Inverted key schedule:\n"); + for (int i = 0; i < 13; ++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 = aes192ecb_decrypt(cypher, &inverted_schedule); printf("\n"); printf("Decrypted: %s\n", format_aes_block128(&decrypted).str); printf(" %s\n", format_aes_block128_fips_style(&decrypted).str); -- cgit v1.2.3