- while(length_b >= ctx->r){
- keccak_nextBlock(ctx, block);
- block = (uint8_t*)block + ctx->bs;
- length_b -= ctx->r;
- }
- memxor(ctx->a, block, (length_b)/8);
- /* append 1 */
- if(length_b & 7){
- /* we have some single bits */
- uint8_t t;
- t = ((uint8_t*)block)[length_b / 8] >> (8 - (length_b & 7));
- t |= 0x01 << (length_b & 7);
- ((uint8_t*)ctx->a)[length_b / 8] ^= t;
- }else{
- ((uint8_t*)ctx->a)[length_b / 8] ^= 0x01;
- }
- if(length_b / 8 + 1 + 3 <= ctx->bs){
- *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
- *((uint8_t*)ctx->a + length_b / 8 + 2) ^= ctx->bs;
- *((uint8_t*)ctx->a + length_b / 8 + 3) ^= 1;
- }else{
- if(length_b / 8 + 1 + 2 <= ctx->bs){
- *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
- *((uint8_t*)ctx->a + length_b / 8 + 2) ^= ctx->bs;
- keccak_f1600(ctx->a);
- ((uint8_t*)ctx->a)[0] ^= 0x01;
- }else{
- if(length_b/8+1+1 <= ctx->bs){
- *((uint8_t*)ctx->a + length_b / 8 + 1) ^= ctx->d;
- keccak_f1600(ctx->a);
- ((uint8_t*)ctx->a)[0] ^= ctx->bs;
- ((uint8_t*)ctx->a)[1] ^= 0x01;
- }else{
- keccak_f1600(ctx->a);
- ((uint8_t*)ctx->a)[0] ^= ctx->d;
- ((uint8_t*)ctx->a)[1] ^= ctx->bs;
- ((uint8_t*)ctx->a)[2] ^= 0x01;
- }
- }
- }
- keccak_f1600(ctx->a);
-}
-
-void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
- while(length_b>=ctx->r){
- memcpy(dest, ctx->a, ctx->bs);
- dest = (uint8_t*)dest + ctx->bs;
- length_b -= ctx->r;
- keccak_f1600(ctx->a);
- }
- memcpy(dest, ctx->a, (length_b+7)/8);
-}
-
-void keccak224_ctx2hash(void* dest, keccak_ctx_t* ctx){
- keccak_ctx2hash(dest, 224, ctx);
-}
-
-void keccak256_ctx2hash(void* dest, keccak_ctx_t* ctx){
- keccak_ctx2hash(dest, 256, ctx);
+ uint8_t length_B;
+ while(length_b >= ctx->r){
+ keccak_nextBlock(ctx, block);
+ block = (uint8_t*)block + ctx->bs;
+ length_b -= ctx->r;
+ }
+ length_B = length_b / 8;
+ memxor(ctx->a, block, length_B);
+ /* append 1 */
+ if(length_b & 7){
+ /* we have some single bits */
+ uint8_t t;
+ t = ((uint8_t*)block)[length_B] >> (8 - (length_b & 7));
+ t |= 0x01 << (length_b & 7);
+ ctx->a[length_B] ^= t;
+ }else{
+ ctx->a[length_B] ^= 0x01;
+ }
+ if(length_b == ctx->r - 1){
+ keccak_f1600(ctx->a);
+ }
+ ctx->a[ctx->bs - 1] ^= 0x80;
+ keccak_f1600(ctx->a);