Lines Matching full:pmac
15 PMAC implementation, process data, by Tom St Denis
22 Process data in a PMAC stream
23 @param pmac The PMAC state
24 @param in The data to send through PMAC
25 @param inlen The length of the data to send through PMAC
28 int pmac_process(pmac_state *pmac, const unsigned char *in, unsigned long inlen)
34 LTC_ARGCHK(pmac != NULL);
36 if ((err = cipher_is_valid(pmac->cipher_idx)) != CRYPT_OK) {
40 if ((pmac->buflen > (int)sizeof(pmac->block)) || (pmac->buflen < 0) ||
41 (pmac->block_len > (int)sizeof(pmac->block)) || (pmac->buflen > pmac->block_len)) {
46 if (pmac->buflen == 0 && inlen > 16) {
49 pmac_shift_xor(pmac);
51 *((LTC_FAST_TYPE*)(&Z[y])) = *((LTC_FAST_TYPE*)(&in[y])) ^ *((LTC_FAST_TYPE*)(&pmac->Li[y]));
53 if ((err = cipher_descriptor[pmac->cipher_idx].ecb_encrypt(Z, Z, &pmac->key)) != CRYPT_OK) {
57 *((LTC_FAST_TYPE*)(&pmac->checksum[y])) ^= *((LTC_FAST_TYPE*)(&Z[y]));
67 if (pmac->buflen == pmac->block_len) {
68 pmac_shift_xor(pmac);
69 for (x = 0; x < (unsigned long)pmac->block_len; x++) {
70 Z[x] = pmac->Li[x] ^ pmac->block[x];
72 if ((err = cipher_descriptor[pmac->cipher_idx].ecb_encrypt(Z, Z, &pmac->key)) != CRYPT_OK) {
75 for (x = 0; x < (unsigned long)pmac->block_len; x++) {
76 pmac->checksum[x] ^= Z[x];
78 pmac->buflen = 0;
82 n = MIN(inlen, (unsigned long)(pmac->block_len - pmac->buflen));
83 XMEMCPY(pmac->block + pmac->buflen, in, n);
84 pmac->buflen += n;
98 /* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_process.c,v $ */
