165 lines
4.4 KiB
C
165 lines
4.4 KiB
C
/* twister-small.c */
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#include <stdint.h>
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#include <string.h>
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#include "memxor.h"
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#include "twister-small.h"
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/*********************************************************************/
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void twister_small_init(twister_state_t *ctx, uint16_t hashsize_b){
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memset(ctx->s, 0, 64);
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ctx->counter=0xffffffffffffffffLL;
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ctx->s[0][7] = hashsize_b>>8;
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ctx->s[1][7] = hashsize_b&0xff;
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ctx->length_counter_b = 0;
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}
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/*********************************************************************/
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void twister_small_nextBlock(twister_state_t *ctx, const void *msg){
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uint8_t tmp[8][8];
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/* round 1 */
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memcpy(tmp, ctx->s, 64);
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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memxor(ctx->s, tmp, 64);
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/* round 2 */
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memcpy(tmp, ctx->s, 64);
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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memxor(ctx->s, tmp, 64);
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/* round 3 */
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memcpy(tmp, ctx->s, 64);
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twister_mini_round(ctx, msg);
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msg = ((uint8_t*)msg) + 8;
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twister_mini_round(ctx, msg);
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twister_blank_round(ctx);
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memxor(ctx->s, tmp, 64);
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ctx->length_counter_b += 512;
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}
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/*********************************************************************/
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void twister_small_lastBlock(twister_state_t *ctx, const void *msg, uint16_t length_b){
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uint8_t tmp[64];
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while(length_b>=512){
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twister_small_nextBlock(ctx, msg);
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msg = ((uint8_t*)msg)+64;
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length_b -= 512;
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}
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memset(tmp, 0, 64);
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memcpy(tmp, msg, (length_b+7)/8);
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tmp[length_b/8] |= 0x80 >> (length_b&0x07);
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twister_small_nextBlock(ctx, tmp);
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ctx->length_counter_b -= 512 - length_b;
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twister_mini_round(ctx, &(ctx->length_counter_b));
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twister_blank_round(ctx);
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}
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/*********************************************************************/
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void twister_small_ctx2hash(void *dest, twister_state_t *ctx, uint16_t hashsize_b){
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twister_ctx2hash(dest, ctx, hashsize_b);
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}
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/*********************************************************************/
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/*********************************************************************/
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#ifndef NO_TWISTER_256
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void twister256_init(twister256_ctx_t *ctx){
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twister_small_init(ctx, 256);
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}
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/*********************************************************************/
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void twister256_nextBlock(twister256_ctx_t *ctx, const void *msg){
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twister_small_nextBlock(ctx, msg);
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}
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/*********************************************************************/
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void twister256_lastBlock(twister256_ctx_t *ctx, const void *msg, uint16_t length_b){
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twister_small_lastBlock(ctx, msg, length_b);
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}
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/*********************************************************************/
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void twister256_ctx2hash(void *dest, twister256_ctx_t *ctx){
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twister_ctx2hash(dest, ctx, 256);
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}
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/*********************************************************************/
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void twister256(void *dest, const void *msg, uint32_t msg_length_b){
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twister_state_t ctx;
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twister_small_init(&ctx, 256);
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while(msg_length_b >=512){
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twister_small_nextBlock(&ctx, msg);
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msg = (uint8_t*)msg + 512/8;
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msg_length_b -= 512;
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}
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twister_small_lastBlock(&ctx, msg, msg_length_b);
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twister_ctx2hash(dest, &ctx, 256);
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}
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/*********************************************************************/
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#endif
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/*********************************************************************/
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/*********************************************************************/
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#ifndef NO_TWISTER_224
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void twister224_init(twister224_ctx_t *ctx){
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twister_small_init(ctx, 224);
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}
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/*********************************************************************/
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void twister224_nextBlock(twister224_ctx_t *ctx, const void *msg){
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twister_small_nextBlock(ctx, msg);
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}
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/*********************************************************************/
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void twister224_lastBlock(twister224_ctx_t *ctx, const void *msg, uint16_t length_b){
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twister_small_lastBlock(ctx, msg, length_b);
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}
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/*********************************************************************/
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void twister224_ctx2hash(void *dest, twister224_ctx_t *ctx){
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twister_ctx2hash(dest, ctx, 224);
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}
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/*********************************************************************/
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void twister224(void *dest, const void *msg, uint32_t msg_length_b){
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twister_state_t ctx;
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twister_small_init(&ctx, 224);
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while(msg_length_b >=512){
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twister_small_nextBlock(&ctx, msg);
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msg = (uint8_t*)msg + 512/8;
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msg_length_b -= 512;
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}
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twister_small_lastBlock(&ctx, msg, msg_length_b);
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twister_ctx2hash(dest, &ctx, 224);
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}
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#endif
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