static int cbc_test_generic(DrewLoader *ldr, const char *name,
const struct test *testdata, size_t ntests)
{
int id, result = 0;
const drew_block_functbl_t *functbl;
drew_block_t algo;
drew_mode_t c;
const void *tmp;
uint8_t buf[128];
id = drew_loader_lookup_by_name(ldr, name, 0, -1);
if (id < 0)
return id;
drew_loader_get_functbl(ldr, id, &tmp);
functbl = tmp;
functbl->init(&algo, 0, ldr, NULL);
for (size_t i = 0; i < ntests; i++) {
memset(buf, 0, sizeof(buf));
result <<= 1;
cbc_init(&c, 0, ldr, NULL);
algo.functbl->init(&algo, 0, ldr, NULL);
algo.functbl->setkey(&algo, testdata[i].key, testdata[i].keysz,
DREW_BLOCK_MODE_ENCRYPT);
cbc_setblock(&c, &algo);
cbc_setiv(&c, testdata[i].iv, testdata[i].ivsz);
cbc_encrypt(&c, buf, testdata[i].input,
MIN(sizeof(buf), testdata[i].datasz));
result |= !!memcmp(buf, testdata[i].output, testdata[i].datasz);
cbc_fini(&c, 0);
algo.functbl->fini(&algo, 0);
cbc_init(&c, 0, ldr, NULL);
algo.functbl->init(&algo, 0, ldr, NULL);
algo.functbl->setkey(&algo, testdata[i].key, testdata[i].keysz,
DREW_BLOCK_MODE_DECRYPT);
cbc_setblock(&c, &algo);
cbc_setiv(&c, testdata[i].iv, testdata[i].ivsz);
cbc_decrypt(&c, buf, testdata[i].output,
MIN(sizeof(buf), testdata[i].datasz));
result |= !!memcmp(buf, testdata[i].input, testdata[i].datasz);
cbc_fini(&c, 0);
algo.functbl->fini(&algo, 0);
}
return result;
}
static int cbc_reset(drew_mode_t *ctx)
{
struct cbc *c = ctx->ctx;
int res = 0;
if ((res = cbc_setiv(ctx, c->iv, c->blksize)))
return res;
return 0;
}
int modes_test(void)
{
unsigned char pt[64], ct[64], tmp[64], key[16], iv[16], iv2[16];
int cipher_idx;
#ifdef LTC_CBC_MODE
symmetric_CBC cbc;
#endif
#ifdef LTC_CFB_MODE
symmetric_CFB cfb;
#endif
#ifdef LTC_OFB_MODE
symmetric_OFB ofb;
#endif
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;
}
#ifdef LTC_F8_MODE
DO(f8_test_mode());
#endif
#ifdef LTC_LRW_MODE
DO(lrw_test());
#endif
#ifdef LTC_CBC_MODE
/* test CBC mode */
/* encode the block */
DO(cbc_start(cipher_idx, iv, key, 16, 0, &cbc));
l = sizeof(iv2);
DO(cbc_getiv(iv2, &l, &cbc));
if (l != 16 || memcmp(iv2, iv, 16)) {
fprintf(stderr, "cbc_getiv failed");
return 1;
}
DO(cbc_encrypt(pt, ct, 64, &cbc));
/* decode the block */
DO(cbc_setiv(iv2, l, &cbc));
zeromem(tmp, sizeof(tmp));
DO(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(cfb_start(cipher_idx, iv, key, 16, 0, &cfb));
l = sizeof(iv2);
DO(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(cfb_encrypt(pt, ct, 64, &cfb));
/* decode the block */
DO(cfb_setiv(iv, l, &cfb));
zeromem(tmp, sizeof(tmp));
DO(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(ofb_start(cipher_idx, iv, key, 16, 0, &ofb));
l = sizeof(iv2);
DO(ofb_getiv(iv2, &l, &ofb));
if (l != 16 || memcmp(iv2, iv, 16)) {
fprintf(stderr, "ofb_getiv failed");
return 1;
}
DO(ofb_encrypt(pt, ct, 64, &ofb));
/* decode the block */
DO(ofb_setiv(iv2, l, &ofb));
zeromem(tmp, sizeof(tmp));
DO(ofb_decrypt(ct, tmp, 64, &ofb));
if (memcmp(tmp, pt, 64) != 0) {
fprintf(stderr, "OFB failed");
return 1;
}
#endif
#ifdef LTC_CTR_MODE
DO(ctr_test());
#endif
return 0;
}
int cbc_encrypt_tweaked(const unsigned char *pt, unsigned long len, unsigned char *ct, const unsigned char *tweak, symmetric_CBC *cbc)
{
(void) cbc_setiv(tweak, cbc->blocklen, cbc);
return cbc_encrypt(pt, ct, len, cbc);
}
int modes_test(void)
{
unsigned char pt[64], ct[64], tmp[64], key[16], iv[16], iv2[16];
int x, cipher_idx;
symmetric_CBC cbc;
symmetric_CFB cfb;
symmetric_OFB ofb;
symmetric_CTR ctr;
unsigned long l;
/* make a random pt, key and iv */
yarrow_read(pt, 64, &test_yarrow);
yarrow_read(key, 16, &test_yarrow);
yarrow_read(iv, 16, &test_yarrow);
/* get idx of AES handy */
cipher_idx = find_cipher("aes");
if (cipher_idx == -1) {
printf("test requires AES");
return 1;
}
/* test CBC mode */
/* encode the block */
DO(cbc_start(cipher_idx, iv, key, 16, 0, &cbc));
l = sizeof(iv2);
DO(cbc_getiv(iv2, &l, &cbc));
if (l != 16 || memcmp(iv2, iv, 16)) {
printf("cbc_getiv failed");
return 1;
}
for (x = 0; x < 4; x++) {
DO(cbc_encrypt(pt+x*16, ct+x*16, &cbc));
}
/* decode the block */
DO(cbc_setiv(iv2, l, &cbc));
zeromem(tmp, sizeof(tmp));
for (x = 0; x < 4; x++) {
DO(cbc_decrypt(ct+x*16, tmp+x*16, &cbc));
}
if (memcmp(tmp, pt, 64) != 0) {
printf("CBC failed");
return 1;
}
/* test CFB mode */
/* encode the block */
DO(cfb_start(cipher_idx, iv, key, 16, 0, &cfb));
l = sizeof(iv2);
DO(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) {
printf("cfb_getiv failed");
return 1;
}
DO(cfb_encrypt(pt, ct, 64, &cfb));
/* decode the block */
DO(cfb_setiv(iv, l, &cfb));
zeromem(tmp, sizeof(tmp));
DO(cfb_decrypt(ct, tmp, 64, &cfb));
if (memcmp(tmp, pt, 64) != 0) {
printf("CFB failed");
return 1;
}
/* test OFB mode */
/* encode the block */
DO(ofb_start(cipher_idx, iv, key, 16, 0, &ofb));
l = sizeof(iv2);
DO(ofb_getiv(iv2, &l, &ofb));
if (l != 16 || memcmp(iv2, iv, 16)) {
printf("ofb_getiv failed");
return 1;
}
DO(ofb_encrypt(pt, ct, 64, &ofb));
/* decode the block */
DO(ofb_setiv(iv2, l, &ofb));
zeromem(tmp, sizeof(tmp));
DO(ofb_decrypt(ct, tmp, 64, &ofb));
if (memcmp(tmp, pt, 64) != 0) {
printf("OFB failed");
return 1;
}
/* test CTR mode */
/* encode the block */
DO(ctr_start(cipher_idx, iv, key, 16, 0, &ctr));
l = sizeof(iv2);
DO(ctr_getiv(iv2, &l, &ctr));
if (l != 16 || memcmp(iv2, iv, 16)) {
printf("ctr_getiv failed");
return 1;
}
DO(ctr_encrypt(pt, ct, 64, &ctr));
/* decode the block */
DO(ctr_setiv(iv2, l, &ctr));
zeromem(tmp, sizeof(tmp));
DO(ctr_decrypt(ct, tmp, 64, &ctr));
if (memcmp(tmp, pt, 64) != 0) {
printf("CTR failed");
return 1;
}
return 0;
}