X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=keccak%2Fkeccak-stub.c;h=d7dabf24fea74da74239338f9ad7749f431f8337;hb=c48e9f61be5047296dfbb6e91c1a2d638f71cc71;hp=5b9e3c48f6485575287fa98c1de775e476b4125e;hpb=6a1c5e57c5aaa60e7f859893866acc7a0c5c6f22;p=avr-crypto-lib.git diff --git a/keccak/keccak-stub.c b/keccak/keccak-stub.c index 5b9e3c4..d7dabf2 100644 --- a/keccak/keccak-stub.c +++ b/keccak/keccak-stub.c @@ -20,274 +20,35 @@ #include #include #include -#include #include "memxor.h" -#include "rotate64.h" #include "keccak.h" -#include "stdio.h" -#ifdef DEBUG -# undef DEBUG -#endif - -#define DEBUG 0 - -#if DEBUG -#include "cli.h" - -void keccak_dump_state(uint64_t a[5][5]){ - uint8_t i,j; - for(i=0; i<5; ++i){ - cli_putstr_P(PSTR("\r\n")); - cli_putc('0'+i); - cli_putstr_P(PSTR(": ")); - for(j=0; j<5; ++j){ - cli_hexdump_rev(&(a[i][j]), 8); - cli_putc(' '); - } - } -} - -void keccak_dump_ctx(keccak_ctx_t* ctx){ - keccak_dump_state(ctx->a); - cli_putstr_P(PSTR("\r\nDBG: r: ")); - cli_hexdump_rev(&(ctx->r), 2); - cli_putstr_P(PSTR("\t c: ")); - cli_hexdump_rev(&(ctx->c), 2); - cli_putstr_P(PSTR("\t d: ")); - cli_hexdump(&(ctx->d), 1); - cli_putstr_P(PSTR("\t bs: ")); - cli_hexdump(&(ctx->bs), 1); -} - -#endif - -/* -const uint64_t rc[] PROGMEM = { - 0x0000000000000001LL, 0x0000000000008082LL, - 0x800000000000808ALL, 0x8000000080008000LL, - 0x000000000000808BLL, 0x0000000080000001LL, - 0x8000000080008081LL, 0x8000000000008009LL, - 0x000000000000008ALL, 0x0000000000000088LL, - 0x0000000080008009LL, 0x000000008000000ALL, - 0x000000008000808BLL, 0x800000000000008BLL, - 0x8000000000008089LL, 0x8000000000008003LL, - 0x8000000000008002LL, 0x8000000000000080LL, - 0x000000000000800ALL, 0x800000008000000ALL, - 0x8000000080008081LL, 0x8000000000008080LL, - 0x0000000080000001LL, 0x8000000080008008LL -}; -*/ - -const static uint8_t rc_comp[] PROGMEM = { - 0x01, 0x92, 0xda, 0x70, - 0x9b, 0x21, 0xf1, 0x59, - 0x8a, 0x88, 0x39, 0x2a, - 0xbb, 0xcb, 0xd9, 0x53, - 0x52, 0xc0, 0x1a, 0x6a, - 0xf1, 0xd0, 0x21, 0x78, -}; - -const static uint8_t r[5][5] PROGMEM = { - { ROT_CODE( 0), ROT_CODE(36), ROT_CODE( 3), ROT_CODE(41), ROT_CODE(18) }, - { ROT_CODE( 1), ROT_CODE(44), ROT_CODE(10), ROT_CODE(45), ROT_CODE( 2) }, - { ROT_CODE(62), ROT_CODE( 6), ROT_CODE(43), ROT_CODE(15), ROT_CODE(61) }, - { ROT_CODE(28), ROT_CODE(55), ROT_CODE(25), ROT_CODE(21), ROT_CODE(56) }, - { ROT_CODE(27), ROT_CODE(20), ROT_CODE(39), ROT_CODE( 8), ROT_CODE(14) } -}; - -void keccak_theta(uint64_t *a, uint64_t *b); - -static inline -void keccak_round(uint64_t a[5][5], uint8_t rci){ - uint64_t b[5][5]; - uint8_t i, j; - union { - uint64_t v64; - uint8_t v8[8]; - } t; - /* theta */ -#if DEBUG - printf_P(PSTR("\npre-theta(1):")); - keccak_dump_state(b); -#endif - keccak_theta((uint64_t*)a, (uint64_t*)b); -#if DEBUG - printf_P(PSTR("\npost-theta(1):")); - keccak_dump_state(b); -#endif - for(i = 0; i < 5; ++i){ - t.v64 = b[(4 + i) % 5][0] ^ rotate64_1bit_left(b[(i + 1) % 5][0]); - for(j = 0; j < 5; ++j){ - a[j][i] ^= t.v64; - } - } -#if DEBUG - cli_putstr_P(PSTR("\r\nAfter theta:")); - keccak_dump_state(a); -#endif - /* rho & pi */ - for(i = 0; i < 5; ++i){ - for(j = 0; j < 5; ++j){ - b[(2 * i + 3 * j) % 5][j] = rotate64left_code(a[j][i], pgm_read_byte(&(r[i][j]))); - } - } -#if DEBUG & 0 - cli_putstr_P(PSTR("\r\n--- after rho & pi ---")); - keccak_dump_state(a); -#endif - /* chi */ - for(i = 0; i < 5; ++i){ - for(j = 0; j < 5; ++j){ - a[j][i] = b[j][i] ^ ((~(b[j][(i + 1) % 5])) & (b[j][(i + 2) % 5])); - } - } -#if DEBUG & 0 - cli_putstr_P(PSTR("\r\nAfter chi:")); - keccak_dump_state(a); -#endif - /* iota */ - -// memcpy_P(&t, &(rc_comp[rci]), 8); - t.v64 = 0; - t.v8[0] = pgm_read_byte(&(rc_comp[rci])); - if(t.v8[0] & 0x40){ - t.v8[7] = 0x80; - } - if(t.v8[0] & 0x20){ - t.v8[3] = 0x80; - } - if(t.v8[0] & 0x10){ - t.v8[1] = 0x80; - } - t.v8[0] &= 0x8F; - - a[0][0] ^= t.v64; -#if DEBUG & 0 - cli_putstr_P(PSTR("\r\nAfter iota:")); - keccak_dump_state(a); -#endif -} - -void keccak_f1600(uint64_t a[5][5]){ - uint8_t i = 0; - do { -#if DEBUG - cli_putstr_P(PSTR("\r\n\r\n--- Round ")); - cli_hexdump(&i, 1); - cli_putstr_P(PSTR(" ---")); -#endif - keccak_round(a, i); - } while (++i < 24); -} - -void keccak_nextBlock(keccak_ctx_t* ctx, const void* block){ - memxor(ctx->a, block, ctx->bs); - keccak_f1600(ctx->a); -} +void keccak_f1600(uint8_t a[200]); void keccak_lastBlock(keccak_ctx_t* ctx, const void* block, uint16_t length_b){ - while(length_b>=ctx->r){ - keccak_nextBlock(ctx, block); - block = (uint8_t*)block + ctx->bs; - length_b -= ctx->r; - } - uint8_t tmp[ctx->bs]; - uint8_t pad[3]; - memset(tmp, 0x00, ctx->bs); - memcpy(tmp, block, (length_b+7)/8); - /* appand 1 */ - if(length_b & 7){ - /* we have some single bits */ - uint8_t t; - t = tmp[length_b / 8] >> (8 - (length_b & 7)); - t |= 0x01 << (length_b & 7); - tmp[length_b / 8] = t; - }else{ - tmp[length_b / 8] = 0x01; - } - pad[0] = ctx->d; - pad[1] = ctx->bs; - pad[2] = 0x01; - if(length_b / 8 + 1 + 3 <= ctx->bs){ - memcpy(tmp + length_b / 8 + 1, pad, 3); - }else{ - if(length_b / 8 + 1 + 2 <= ctx->bs){ - memcpy(tmp+length_b/8+1, pad, 2); - keccak_nextBlock(ctx, tmp); - memset(tmp, 0x00, ctx->bs); - tmp[0] = 0x01; - }else{ - if(length_b/8+1+1 <= ctx->bs){ - memcpy(tmp + length_b / 8 + 1, pad, 1); - keccak_nextBlock(ctx, tmp); - memset(tmp, 0x00, ctx->bs); - tmp[0] = ctx->bs; - tmp[1] = 0x01; - }else{ - keccak_nextBlock(ctx, tmp); - memset(tmp, 0x00, ctx->bs); - tmp[0] = ctx->d; - tmp[1] = ctx->bs; - tmp[2] = 0x01; - } - } - } - keccak_nextBlock(ctx, tmp); + 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); } -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); -} - -void keccak384_ctx2hash(void* dest, keccak_ctx_t* ctx){ - keccak_ctx2hash(dest, 384, ctx); -} - -void keccak512_ctx2hash(void* dest, keccak_ctx_t* ctx){ - keccak_ctx2hash(dest, 512, ctx); -} - -/* - 1. SHA3-224: ⌊Keccak[r = 1152, c = 448, d = 28]⌋224 - 2. SHA3-256: ⌊Keccak[r = 1088, c = 512, d = 32]⌋256 - 3. SHA3-384: ⌊Keccak[r = 832, c = 768, d = 48]⌋384 - 4. SHA3-512: ⌊Keccak[r = 576, c = 1024, d = 64]⌋512 -*/ -void keccak_init(uint16_t r, uint16_t c, uint8_t d, keccak_ctx_t* ctx){ - memset(ctx->a, 0x00, 5 * 5 * 8); - ctx->r = r; - ctx->c = c; - ctx->d = d; - ctx->bs = (uint8_t)(r / 8); -} - -void keccak224_init(keccak_ctx_t* ctx){ - keccak_init(1152, 448, 28, ctx); -} -void keccak256_init(keccak_ctx_t* ctx){ - keccak_init(1088, 512, 32, ctx); -} - -void keccak384_init(keccak_ctx_t* ctx){ - keccak_init( 832, 768, 48, ctx); -} - -void keccak512_init(keccak_ctx_t* ctx){ - keccak_init( 576, 1024, 64, ctx); -}