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