+++ /dev/null
-/* 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.
- */
-#include "tomcrypt.h"
-
-/**
- @file xcbc_process.c
- XCBC Support, process blocks with XCBC
-*/
-
-#ifdef LTC_XCBC
-
-/** Process data through XCBC-MAC
- @param xcbc The XCBC-MAC state
- @param in Input data to process
- @param inlen Length of input in octets
- Return CRYPT_OK on success
-*/
-int xcbc_process(xcbc_state *xcbc, const unsigned char *in, unsigned long inlen)
-{
- int err;
-#ifdef LTC_FAST
- int x;
-#endif
-
- LTC_ARGCHK(xcbc != NULL);
- LTC_ARGCHK(in != NULL);
-
- /* check structure */
- if ((err = cipher_is_valid(xcbc->cipher)) != CRYPT_OK) {
- return err;
- }
-
- if ((xcbc->blocksize > cipher_descriptor[xcbc->cipher].block_length) || (xcbc->blocksize < 0) ||
- (xcbc->buflen > xcbc->blocksize) || (xcbc->buflen < 0)) {
- return CRYPT_INVALID_ARG;
- }
-
-#ifdef LTC_FAST
- if (xcbc->buflen == 0) {
- while (inlen > (unsigned long)xcbc->blocksize) {
- for (x = 0; x < xcbc->blocksize; x += sizeof(LTC_FAST_TYPE)) {
- *(LTC_FAST_TYPE_PTR_CAST(&(xcbc->IV[x]))) ^= *(LTC_FAST_TYPE_PTR_CAST(&(in[x])));
- }
- cipher_descriptor[xcbc->cipher].ecb_encrypt(xcbc->IV, xcbc->IV, &xcbc->key);
- in += xcbc->blocksize;
- inlen -= xcbc->blocksize;
- }
- }
-#endif
-
- while (inlen) {
- if (xcbc->buflen == xcbc->blocksize) {
- cipher_descriptor[xcbc->cipher].ecb_encrypt(xcbc->IV, xcbc->IV, &xcbc->key);
- xcbc->buflen = 0;
- }
- xcbc->IV[xcbc->buflen++] ^= *in++;
- --inlen;
- }
- return CRYPT_OK;
-}
-
-#endif
-
-/* ref: $Format:%D$ */
-/* git commit: $Format:%H$ */
-/* commit time: $Format:%ai$ */
-