[keccak-c] fixing
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628319e6c3
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cd50f65c37
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@ -96,7 +96,7 @@ const static uint8_t r[5][5] PROGMEM = {
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};
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static inline
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void keccak_round(uint64_t a[5][5], uint8_t rci){
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void keccak_round(uint64_t *a, uint8_t rci){
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uint64_t b[5][5];
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uint8_t i, j;
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union {
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@ -105,12 +105,12 @@ void keccak_round(uint64_t a[5][5], uint8_t rci){
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} t;
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/* theta */
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for(i = 0; i < 5; ++i){
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b[i][0] = a[0][i] ^ a[1][i] ^ a[2][i] ^ a[3][i] ^ a[4][i];
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b[i][0] = a[i] ^ a[5 + i] ^ a[10 + i] ^ a[15 + i] ^ a[20 + i];
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}
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for(i = 0; i < 5; ++i){
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t.v64 = b[(4 + i) % 5][0] ^ rotate64_1bit_left(b[(i + 1) % 5][0]);
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for(j = 0; j < 5; ++j){
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a[j][i] ^= t.v64;
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a[j * 5 + i] ^= t.v64;
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}
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}
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#if DEBUG
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@ -120,7 +120,7 @@ void keccak_round(uint64_t a[5][5], uint8_t rci){
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/* rho & pi */
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for(i = 0; i < 5; ++i){
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for(j = 0; j < 5; ++j){
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b[(2 * i + 3 * j) % 5][j] = rotate64left_code(a[j][i], pgm_read_byte(&(r[i][j])));
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b[(2 * i + 3 * j) % 5][j] = rotate64left_code(a[j * 5 +i], pgm_read_byte(&(r[i][j])));
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}
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}
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#if DEBUG
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@ -130,7 +130,7 @@ void keccak_round(uint64_t a[5][5], uint8_t rci){
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/* chi */
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for(i = 0; i < 5; ++i){
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for(j = 0; j < 5; ++j){
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a[j][i] = b[j][i] ^ ((~(b[j][(i + 1) % 5])) & (b[j][(i + 2) % 5]));
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a[j * 5 + i] = b[j][i] ^ ((~(b[j][(i + 1) % 5])) & (b[j][(i + 2) % 5]));
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}
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}
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#if DEBUG
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@ -153,14 +153,14 @@ void keccak_round(uint64_t a[5][5], uint8_t rci){
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}
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t.v8[0] &= 0x8F;
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a[0][0] ^= t.v64;
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a[0] ^= t.v64;
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#if DEBUG
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cli_putstr_P(PSTR("\r\nAfter iota:"));
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keccak_dump_state(a);
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#endif
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}
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void keccak_f1600(uint64_t a[5][5]){
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void keccak_f1600(void* a){
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uint8_t i = 0;
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do {
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#if DEBUG
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@ -168,7 +168,7 @@ void keccak_f1600(uint64_t a[5][5]){
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cli_hexdump(&i, 1);
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cli_putstr_P(PSTR(" ---"));
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#endif
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keccak_round(a, i);
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keccak_round((uint64_t*)a, i);
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} while (++i < 24);
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}
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@ -178,57 +178,33 @@ void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){
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}
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void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){
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while(length_b>=ctx->r){
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uint8_t length_B;
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while(length_b >= ctx->r){
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keccak_nextBlock(ctx, block);
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block = (uint8_t*)block + ctx->bs;
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length_b -= ctx->r;
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}
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uint8_t tmp[ctx->bs];
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uint8_t pad[3];
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memset(tmp, 0x00, ctx->bs);
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memcpy(tmp, block, (length_b+7)/8);
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/* appand 1 */
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length_B = length_b / 8;
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memxor(ctx->a, block, length_B);
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/* append 1 */
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if(length_b & 7){
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/* we have some single bits */
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uint8_t t;
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t = tmp[length_b / 8] >> (8 - (length_b & 7));
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t = ((uint8_t*)block)[length_B] >> (8 - (length_b & 7));
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t |= 0x01 << (length_b & 7);
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tmp[length_b / 8] = t;
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ctx->a[length_B] ^= t;
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}else{
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tmp[length_b / 8] = 0x01;
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ctx->a[length_B] ^= 0x01;
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}
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pad[0] = ctx->d;
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pad[1] = ctx->bs;
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pad[2] = 0x01;
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if(length_b / 8 + 1 + 3 <= ctx->bs){
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memcpy(tmp + length_b / 8 + 1, pad, 3);
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}else{
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if(length_b / 8 + 1 + 2 <= ctx->bs){
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memcpy(tmp+length_b/8+1, pad, 2);
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keccak_nextBlock(ctx, tmp);
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memset(tmp, 0x00, ctx->bs);
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tmp[0] = 0x01;
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}else{
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if(length_b/8+1+1 <= ctx->bs){
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memcpy(tmp + length_b / 8 + 1, pad, 1);
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keccak_nextBlock(ctx, tmp);
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memset(tmp, 0x00, ctx->bs);
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tmp[0] = ctx->bs;
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tmp[1] = 0x01;
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}else{
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keccak_nextBlock(ctx, tmp);
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memset(tmp, 0x00, ctx->bs);
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tmp[0] = ctx->d;
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tmp[1] = ctx->bs;
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tmp[2] = 0x01;
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if(length_b == ctx->r - 1){
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keccak_f1600(ctx->a);
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}
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}
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}
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keccak_nextBlock(ctx, tmp);
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ctx->a[ctx->bs - 1] ^= 0x80;
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keccak_f1600(ctx->a);
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}
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void keccak_ctx2hash(void* dest, uint16_t length_b, keccak_ctx_t* ctx){
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while(length_b>=ctx->r){
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while(length_b >= ctx->r){
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memcpy(dest, ctx->a, ctx->bs);
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dest = (uint8_t*)dest + ctx->bs;
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length_b -= ctx->r;
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@ -259,26 +235,24 @@ void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){
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3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384
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4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512
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*/
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void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){
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void keccak_init(uint16_t r, keccak_ctx_t* ctx){
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memset(ctx->a, 0x00, 5 * 5 * 8);
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ctx->r = r;
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ctx->c = c;
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ctx->d = d;
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ctx->bs = (uint8_t)(r / 8);
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}
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void keccak224_init(keccak_ctx_t* ctx){
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keccak_init(1152, 448, 28, ctx);
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keccak_init(1152, ctx);
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}
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void keccak256_init(keccak_ctx_t* ctx){
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keccak_init(1088, 512, 32, ctx);
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keccak_init(1088, ctx);
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}
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void keccak384_init(keccak_ctx_t* ctx){
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keccak_init( 832, 768, 48, ctx);
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keccak_init( 832, ctx);
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}
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void keccak512_init(keccak_ctx_t* ctx){
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keccak_init( 576, 1024, 64, ctx);
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keccak_init( 576, ctx);
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}
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@ -38,7 +38,7 @@ typedef struct{
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} keccak_ctx_t;
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void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx);
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void keccak_init(uint16_t r, keccak_ctx_t* ctx);
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void keccak224_init(keccak_ctx_t* ctx);
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void keccak256_init(keccak_ctx_t* ctx);
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void keccak384_init(keccak_ctx_t* ctx);
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