Lines Matching full:pmac
15 PMAC implementation, initialize state, by Tom St Denis
39 Initialize a PMAC state
40 @param pmac The PMAC state to initialize
46 int pmac_init(pmac_state *pmac, int cipher, const unsigned char *key, unsigned long keylen)
51 LTC_ARGCHK(pmac != NULL);
60 pmac->block_len = cipher_descriptor[cipher].block_length;
62 if (polys[poly].len == pmac->block_len) {
66 if (polys[poly].len != pmac->block_len) {
71 if (pmac->block_len % sizeof(LTC_FAST_TYPE)) {
78 if ((err = cipher_descriptor[cipher].setup(key, keylen, 0, &pmac->key)) != CRYPT_OK) {
83 L = XMALLOC(pmac->block_len);
89 zeromem(L, pmac->block_len);
90 if ((err = cipher_descriptor[cipher].ecb_encrypt(L, L, &pmac->key)) != CRYPT_OK) {
95 XMEMCPY(pmac->Ls[0], L, pmac->block_len);
97 m = pmac->Ls[x-1][0] >> 7;
98 for (y = 0; y < pmac->block_len-1; y++) {
99 pmac->Ls[x][y] = ((pmac->Ls[x-1][y] << 1) | (pmac->Ls[x-1][y+1] >> 7)) & 255;
101 pmac->Ls[x][pmac->block_len-1] = (pmac->Ls[x-1][pmac->block_len-1] << 1) & 255;
104 for (y = 0; y < pmac->block_len; y++) {
105 pmac->Ls[x][y] ^= polys[poly].poly_mul[y];
111 m = L[pmac->block_len-1] & 1;
114 for (x = pmac->block_len - 1; x > 0; x--) {
115 pmac->Lr[x] = ((L[x] >> 1) | (L[x-1] << 7)) & 255;
117 pmac->Lr[0] = L[0] >> 1;
120 for (x = 0; x < pmac->block_len; x++) {
121 pmac->Lr[x] ^= polys[poly].poly_div[x];
126 pmac->block_index = 1;
127 pmac->cipher_idx = cipher;
128 pmac->buflen = 0;
129 zeromem(pmac->block, sizeof(pmac->block));
130 zeromem(pmac->Li, sizeof(pmac->Li));
131 zeromem(pmac->checksum, sizeof(pmac->checksum));
135 zeromem(L, pmac->block_len);
145 /* $Source: /cvs/libtom/libtomcrypt/src/mac/pmac/pmac_init.c,v $ */
