Update the hash value by appending a buffer. Definition at line 181 of file md5.c. 00182 { 00183 unsigned char *b, *ib; 00184 size_t blen, left, clen; 00185 00186 /* Store how many bytes we process and obtain the buffer length */ 00187 b = (unsigned char *)m->buf; 00188 blen = m->count & 0x3f; 00189 m->count += len; 00190 ib = (unsigned char *)buf; 00191 00192 /* Finish off an incomplete chunk first if we must */ 00193 if (blen != 0) { 00194 /* How many bytes we still need */ 00195 left = 64 - blen; 00196 /* How many bytes we're going to copy */ 00197 clen = MIN(left, len); 00198 00199 memcpy(b + blen, ib, clen); 00200 /* This still doesn't make up for a full block */ 00201 if (len < left) 00202 return; 00203 00204 md5_decode(m->buf); 00205 md5_transform(m->state, m->buf); 00206 ib += clen; 00207 len -= clen; 00208 } 00209 00210 /* Handle the data in 64 byte chunks */ 00211 while (len >= 64) { 00212 memcpy(m->buf, ib, 64); 00213 md5_decode(m->buf); 00214 md5_transform(m->state, m->buf); 00215 ib += 64; 00216 len -= 64; 00217 } 00218 00219 /* Copy in the last partial frame */ 00220 memcpy(m->buf, ib, len); 00221 }
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1.6.3
