Commit f0053e65 authored by Niels Möller's avatar Niels Möller

(test_cbc_bulk): New function, testing CBC

with larger blocks.

Rev: src/nettle/testsuite/cbc-test.c:1.3
parent b44f9704
#include "testutils.h"
#include "aes.h"
#include "cbc.h"
#include "knuth-lfib.h"
/* Test with more data and inplace decryption, to check that the
* cbc_decrypt buffering works. */
#define CBC_BULK_DATA 0x2710 /* 10000 */
static void
test_cbc_bulk(void)
{
struct knuth_lfib_ctx random;
uint8_t clear[CBC_BULK_DATA];
uint8_t cipher[CBC_BULK_DATA + 1];
const uint8_t *key = H("966c7bf00bebe6dc 8abd37912384958a"
"743008105a08657d dcaad4128eee38b3");
const uint8_t *start_iv = H("11adbff119749103 207619cfa0e8d13a");
const uint8_t *end_iv = H("c7a42a569b421224 d0c23e52f46f97f5");
struct CBC_CTX(struct aes_ctx, AES_BLOCK_SIZE) aes;
knuth_lfib_init(&random, CBC_BULK_DATA);
knuth_lfib_random(&random, CBC_BULK_DATA, clear);
/* Byte that should not be overwritten */
cipher[CBC_BULK_DATA] = 17;
aes_set_key(&aes.ctx, 32, key);
CBC_SET_IV(&aes, start_iv);
CBC_ENCRYPT(&aes, aes_encrypt, CBC_BULK_DATA, cipher, clear);
if (cipher[CBC_BULK_DATA] != 17)
FAIL();
if (verbose)
{
printf("IV after bulk encryption: ");
print_hex(AES_BLOCK_SIZE, aes.iv);
printf("\n");
}
if (!MEMEQ(AES_BLOCK_SIZE, aes.iv, end_iv))
FAIL();
/* Decrypt, in place */
CBC_SET_IV(&aes, start_iv);
CBC_DECRYPT(&aes, aes_decrypt, CBC_BULK_DATA, cipher, cipher);
if (cipher[CBC_BULK_DATA] != 17)
FAIL();
if (verbose)
{
printf("IV after bulk decryption: ");
print_hex(AES_BLOCK_SIZE, aes.iv);
printf("\n");
}
if (!MEMEQ(AES_BLOCK_SIZE, aes.iv, end_iv))
FAIL();
if (!MEMEQ(CBC_BULK_DATA, clear, cipher))
FAIL();
}
int
test_main(void)
{
uint8_t msg[2 * AES_BLOCK_SIZE] = "Listen, I'll say this only once!";
/* Intermediate values:
* iv XOR first message block:
* "a5 ce 55 d4 21 15 a1 c6 4a a4 0c b2 ca a6 d1 37"
......@@ -36,7 +103,7 @@ test_main(void)
* F.2.1 CBC-AES128.Encrypt
*/
/* Intermediate values, blcoks input to AES:
/* Intermediate values, blocks input to AES:
*
* 6bc0bce12a459991e134741a7f9e1925
* d86421fb9f1a1eda505ee1375746972c
......@@ -101,6 +168,8 @@ test_main(void)
"b2eb05e2c39be9fcda6c19078c6a9d1b"),
H("000102030405060708090a0b0c0d0e0f"));
test_cbc_bulk();
SUCCESS();
}
......
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