Mercurial > dropbear

comparison ocb_init.c @ 143:5d99163f7e32 libtomcrypt-orig

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
import of libtomcrypt 0.99
author Matt Johnston <matt@ucc.asn.au>
date Sun, 19 Dec 2004 11:34:45 +0000
parents 7faae8f46238
children
comparison
equal deleted inserted replaced
15:6362d3854bb4 143:5d99163f7e32
71 ocb->R[x] = ocb->L[x] ^ nonce[x]; 71 ocb->R[x] = ocb->L[x] ^ nonce[x];
72 } 72 }
73 cipher_descriptor[cipher].ecb_encrypt(ocb->R, ocb->R, &ocb->key); 73 cipher_descriptor[cipher].ecb_encrypt(ocb->R, ocb->R, &ocb->key);
74 74
75 /* find Ls[i] = L << i for i == 0..31 */ 75 /* find Ls[i] = L << i for i == 0..31 */
76 memcpy(ocb->Ls[0], ocb->L, ocb->block_len); 76 XMEMCPY(ocb->Ls[0], ocb->L, ocb->block_len);
77 for (x = 1; x < 32; x++) { 77 for (x = 1; x < 32; x++) {
78 m = ocb->Ls[x-1][0] >> 7; 78 m = ocb->Ls[x-1][0] >> 7;
79 for (y = 0; y < ocb->block_len-1; y++) { 79 for (y = 0; y < ocb->block_len-1; y++) {
80 ocb->Ls[x][y] = ((ocb->Ls[x-1][y] << 1) | (ocb->Ls[x-1][y+1] >> 7)) & 255; 80 ocb->Ls[x][y] = ((ocb->Ls[x-1][y] << 1) | (ocb->Ls[x-1][y+1] >> 7)) & 255;
81 } 81 }
102 ocb->Lr[x] ^= polys[poly].poly_div[x]; 102 ocb->Lr[x] ^= polys[poly].poly_div[x];
103 } 103 }
104 } 104 }
105 105
106 /* set Li, checksum */ 106 /* set Li, checksum */
107 zeromem(ocb->Li, ocb->block_len); 107 zeromem(ocb->Li, ocb->block_len);
108 zeromem(ocb->checksum, ocb->block_len); 108 zeromem(ocb->checksum, ocb->block_len);
109 109
110 /* set other params */ 110 /* set other params */
111 ocb->block_index = 1; 111 ocb->block_index = 1;
112 ocb->cipher = cipher; 112 ocb->cipher = cipher;