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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*/
/* test CFB/OFB/CBC modes */
#include <tomcrypt_test.h>
int modes_test(void)
{
int ret = CRYPT_NOP;
#ifdef LTC_CBC_MODE
symmetric_CBC cbc;
#endif
#ifdef LTC_CFB_MODE
symmetric_CFB cfb;
#endif
#ifdef LTC_OFB_MODE
symmetric_OFB ofb;
#endif
#if defined(LTC_CBC_MODE) || defined(LTC_CFB_MODE) || defined(LTC_OFB_MODE)
unsigned char pt[64], ct[64], tmp[64], key[16], iv[16], iv2[16];
int cipher_idx;
unsigned long l;
/* make a random pt, key and iv */
yarrow_read(pt, 64, &yarrow_prng);
yarrow_read(key, 16, &yarrow_prng);
yarrow_read(iv, 16, &yarrow_prng);
/* get idx of AES handy */
cipher_idx = find_cipher("aes");
if (cipher_idx == -1) {
fprintf(stderr, "test requires AES");
return 1;
}
#endif
#ifdef LTC_F8_MODE
DO(ret = f8_test_mode());
#endif
#ifdef LTC_LRW_MODE
DO(ret = lrw_test());
#endif
#ifdef LTC_CBC_MODE
/* test CBC mode */
/* encode the block */
DO(ret = cbc_start(cipher_idx, iv, key, 16, 0, &cbc));
l = sizeof(iv2);
DO(ret = cbc_getiv(iv2, &l, &cbc));
if (l != 16 || memcmp(iv2, iv, 16)) {
fprintf(stderr, "cbc_getiv failed");
return 1;
}
DO(ret = cbc_encrypt(pt, ct, 64, &cbc));
/* decode the block */
DO(ret = cbc_setiv(iv2, l, &cbc));
zeromem(tmp, sizeof(tmp));
DO(ret = cbc_decrypt(ct, tmp, 64, &cbc));
if (memcmp(tmp, pt, 64) != 0) {
fprintf(stderr, "CBC failed");
return 1;
}
#endif
#ifdef LTC_CFB_MODE
/* test CFB mode */
/* encode the block */
DO(ret = cfb_start(cipher_idx, iv, key, 16, 0, &cfb));
l = sizeof(iv2);
DO(ret = cfb_getiv(iv2, &l, &cfb));
/* note we don't memcmp iv2/iv since cfb_start processes the IV for the first block */
if (l != 16) {
fprintf(stderr, "cfb_getiv failed");
return 1;
}
DO(ret = cfb_encrypt(pt, ct, 64, &cfb));
/* decode the block */
DO(ret = cfb_setiv(iv, l, &cfb));
zeromem(tmp, sizeof(tmp));
DO(ret = cfb_decrypt(ct, tmp, 64, &cfb));
if (memcmp(tmp, pt, 64) != 0) {
fprintf(stderr, "CFB failed");
return 1;
}
#endif
#ifdef LTC_OFB_MODE
/* test OFB mode */
/* encode the block */
DO(ret = ofb_start(cipher_idx, iv, key, 16, 0, &ofb));
l = sizeof(iv2);
DO(ret = ofb_getiv(iv2, &l, &ofb));
if (l != 16 || memcmp(iv2, iv, 16)) {
fprintf(stderr, "ofb_getiv failed");
return 1;
}
DO(ret = ofb_encrypt(pt, ct, 64, &ofb));
/* decode the block */
DO(ret = ofb_setiv(iv2, l, &ofb));
zeromem(tmp, sizeof(tmp));
DO(ret = ofb_decrypt(ct, tmp, 64, &ofb));
if (memcmp(tmp, pt, 64) != 0) {
fprintf(stderr, "OFB failed");
return 1;
}
#endif
#if defined(LTC_CTR_MODE) && defined(LTC_RIJNDAEL)
DO(ret = ctr_test());
#endif
#ifdef LTC_XTS_MODE
DO(ret = xts_test());
#endif
return 0;
}
/* ref: $Format:%D$ */
/* git commit: $Format:%H$ */
/* commit time: $Format:%ai$ */
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