+++ /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 pmac_process.c
- PMAC implementation, process data, by Tom St Denis
-*/
-
-
-#ifdef LTC_PMAC
-
-/**
- Process data in a PMAC stream
- @param pmac The PMAC state
- @param in The data to send through PMAC
- @param inlen The length of the data to send through PMAC
- @return CRYPT_OK if successful
-*/
-int pmac_process(pmac_state *pmac, const unsigned char *in, unsigned long inlen)
-{
- int err, n;
- unsigned long x;
- unsigned char Z[MAXBLOCKSIZE];
-
- LTC_ARGCHK(pmac != NULL);
- LTC_ARGCHK(in != NULL);
- if ((err = cipher_is_valid(pmac->cipher_idx)) != CRYPT_OK) {
- return err;
- }
-
- if ((pmac->buflen > (int)sizeof(pmac->block)) || (pmac->buflen < 0) ||
- (pmac->block_len > (int)sizeof(pmac->block)) || (pmac->buflen > pmac->block_len)) {
- return CRYPT_INVALID_ARG;
- }
-
-#ifdef LTC_FAST
- if (pmac->buflen == 0 && inlen > 16) {
- unsigned long y;
- for (x = 0; x < (inlen - 16); x += 16) {
- pmac_shift_xor(pmac);
- for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
- *(LTC_FAST_TYPE_PTR_CAST(&Z[y])) = *(LTC_FAST_TYPE_PTR_CAST(&in[y])) ^ *(LTC_FAST_TYPE_PTR_CAST(&pmac->Li[y]));
- }
- if ((err = cipher_descriptor[pmac->cipher_idx].ecb_encrypt(Z, Z, &pmac->key)) != CRYPT_OK) {
- return err;
- }
- for (y = 0; y < 16; y += sizeof(LTC_FAST_TYPE)) {
- *(LTC_FAST_TYPE_PTR_CAST(&pmac->checksum[y])) ^= *(LTC_FAST_TYPE_PTR_CAST(&Z[y]));
- }
- in += 16;
- }
- inlen -= x;
- }
-#endif
-
- while (inlen != 0) {
- /* ok if the block is full we xor in prev, encrypt and replace prev */
- if (pmac->buflen == pmac->block_len) {
- pmac_shift_xor(pmac);
- for (x = 0; x < (unsigned long)pmac->block_len; x++) {
- Z[x] = pmac->Li[x] ^ pmac->block[x];
- }
- if ((err = cipher_descriptor[pmac->cipher_idx].ecb_encrypt(Z, Z, &pmac->key)) != CRYPT_OK) {
- return err;
- }
- for (x = 0; x < (unsigned long)pmac->block_len; x++) {
- pmac->checksum[x] ^= Z[x];
- }
- pmac->buflen = 0;
- }
-
- /* add bytes */
- n = MIN(inlen, (unsigned long)(pmac->block_len - pmac->buflen));
- XMEMCPY(pmac->block + pmac->buflen, in, n);
- pmac->buflen += n;
- inlen -= n;
- in += n;
- }
-
-#ifdef LTC_CLEAN_STACK
- zeromem(Z, sizeof(Z));
-#endif
-
- return CRYPT_OK;
-}
-
-#endif
-
-/* ref: $Format:%D$ */
-/* git commit: $Format:%H$ */
-/* commit time: $Format:%ai$ */