angd-dev/data-lite-c
1
0
Fork 0
Code Pull Requests Releases Activity

Upgrade libtomcrypt

Browse Source
This commit is contained in:
Oleksii Zghurskyi
2025-10-24 19:33:21 +03:00
parent d770dd8df3
commit acc69bb8ad
157 changed files with 922 additions and 761 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
Sources/DataLiteC/libtomcrypt/modes/cbc/cbc_decrypt.c
View File

@@ -32,51 +32,51 @@ int cbc_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long len, s
LTC_ARGCHK(ct != NULL);
LTC_ARGCHK(cbc != NULL);
if ((err = cipher_is_valid(cbc->cipher)) != CRYPT_OK) {
if ((err = cipher_is_valid(cbc->ecb.cipher)) != CRYPT_OK) {
return err;
}
/* is blocklen valid? */
if (cbc->blocklen < 1 || cbc->blocklen > (int)sizeof(cbc->IV) || cbc->blocklen > (int)sizeof(tmp)) {
if (cbc->ecb.blocklen < 1 || cbc->ecb.blocklen > (int)sizeof(cbc->IV) || cbc->ecb.blocklen > (int)sizeof(tmp)) {
return CRYPT_INVALID_ARG;
}
if (len % cbc->blocklen) {
if (len % cbc->ecb.blocklen) {
return CRYPT_INVALID_ARG;
}
#ifdef LTC_FAST
if (cbc->blocklen % sizeof(LTC_FAST_TYPE)) {
if (cbc->ecb.blocklen % sizeof(LTC_FAST_TYPE)) {
return CRYPT_INVALID_ARG;
}
#endif
if (cipher_descriptor[cbc->cipher].accel_cbc_decrypt != NULL) {
return cipher_descriptor[cbc->cipher].accel_cbc_decrypt(ct, pt, len / cbc->blocklen, cbc->IV, &cbc->key);
if (cipher_descriptor[cbc->ecb.cipher].accel_cbc_decrypt != NULL) {
return cipher_descriptor[cbc->ecb.cipher].accel_cbc_decrypt(ct, pt, len / cbc->ecb.blocklen, cbc->IV, &cbc->ecb.key);
}
while (len) {
/* decrypt */
if ((err = cipher_descriptor[cbc->cipher].ecb_decrypt(ct, tmp, &cbc->key)) != CRYPT_OK) {
if ((err = ecb_decrypt_block(ct, tmp, &cbc->ecb)) != CRYPT_OK) {
return err;
}
/* xor IV against plaintext */
#if defined(LTC_FAST)
for (x = 0; x < cbc->blocklen; x += sizeof(LTC_FAST_TYPE)) {
for (x = 0; x < cbc->ecb.blocklen; x += sizeof(LTC_FAST_TYPE)) {
tmpy = *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) ^ *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)tmp + x));
*(LTC_FAST_TYPE_PTR_CAST((unsigned char *)cbc->IV + x)) = *(LTC_FAST_TYPE_PTR_CAST((unsigned char *)ct + x));
*(LTC_FAST_TYPE_PTR_CAST((unsigned char *)pt + x)) = tmpy;
}
#else
for (x = 0; x < cbc->blocklen; x++) {
for (x = 0; x < cbc->ecb.blocklen; x++) {
tmpy = tmp[x] ^ cbc->IV[x];
cbc->IV[x] = ct[x];
pt[x] = tmpy;
}
#endif
ct += cbc->blocklen;
pt += cbc->blocklen;
len -= cbc->blocklen;
ct += cbc->ecb.blocklen;
pt += cbc->ecb.blocklen;
len -= cbc->ecb.blocklen;
}
return CRYPT_OK;
}