/* crypto/sha/sha256.c */ /* ==================================================================== * Copyright (c) 2004 The OpenSSL Project. All rights reserved * according to the OpenSSL license [found in ./md32_common.h]. * ==================================================================== */ #include <stdlib.h> #include <string.h> #include "sha256.h" int SHA224_Init (SHA256_CTX *c) { c->h[0]=0xc1059ed8UL; c->h[1]=0x367cd507UL; c->h[2]=0x3070dd17UL; c->h[3]=0xf70e5939UL; c->h[4]=0xffc00b31UL; c->h[5]=0x68581511UL; c->h[6]=0x64f98fa7UL; c->h[7]=0xbefa4fa4UL; c->Nl=0; c->Nh=0; c->num=0; c->md_len=SHA224_DIGEST_LENGTH; return 1; } int SHA256_Init (SHA256_CTX *c) { c->h[0]=0x6a09e667UL; c->h[1]=0xbb67ae85UL; c->h[2]=0x3c6ef372UL; c->h[3]=0xa54ff53aUL; c->h[4]=0x510e527fUL; c->h[5]=0x9b05688cUL; c->h[6]=0x1f83d9abUL; c->h[7]=0x5be0cd19UL; c->Nl=0; c->Nh=0; c->num=0; c->md_len=SHA256_DIGEST_LENGTH; return 1; } unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md) { SHA256_CTX c; static unsigned char m[SHA224_DIGEST_LENGTH]; if (md == NULL) md=m; SHA224_Init(&c); SHA256_Update(&c,d,n); SHA256_Final(md,&c); return(md); } unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md) { SHA256_CTX c; static unsigned char m[SHA256_DIGEST_LENGTH]; if (md == NULL) md=m; SHA256_Init(&c); SHA256_Update(&c,d,n); SHA256_Final(md,&c); return(md); } int SHA224_Update(SHA256_CTX *c, const void *data, size_t len) { return SHA256_Update (c,data,len); } int SHA224_Final (unsigned char *md, SHA256_CTX *c) { return SHA256_Final (md,c); } #define DATA_ORDER_IS_BIG_ENDIAN #define HASH_LONG uint32_t #define HASH_LONG_LOG2 2 #define HASH_CTX SHA256_CTX #define HASH_CBLOCK SHA_CBLOCK #define HASH_LBLOCK SHA_LBLOCK /* * Note that FIPS180-2 discusses "Truncation of the Hash Function Output." * default: case below covers for it. It's not clear however if it's * permitted to truncate to amount of bytes not divisible by 4. I bet not, * but if it is, then default: case shall be extended. For reference. * Idea behind separate cases for pre-defined lenghts is to let the * compiler decide if it's appropriate to unroll small loops. */ #define HASH_MAKE_STRING(c,s) do { \ unsigned long ll; \ unsigned int n; \ switch ((c)->md_len) \ { case SHA224_DIGEST_LENGTH: \ for (n=0;n<SHA224_DIGEST_LENGTH/4;n++) \ { ll=(c)->h[n]; HOST_l2c(ll,(s)); } \ break; \ case SHA256_DIGEST_LENGTH: \ for (n=0;n<SHA256_DIGEST_LENGTH/4;n++) \ { ll=(c)->h[n]; HOST_l2c(ll,(s)); } \ break; \ default: \ if ((c)->md_len > SHA256_DIGEST_LENGTH) \ return 0; \ for (n=0;n<(c)->md_len/4;n++) \ { ll=(c)->h[n]; HOST_l2c(ll,(s)); } \ break; \ } \ } while (0) #define HASH_UPDATE SHA256_Update #define HASH_TRANSFORM SHA256_Transform #define HASH_FINAL SHA256_Final #define HASH_BLOCK_HOST_ORDER sha256_block_host_order #define HASH_BLOCK_DATA_ORDER sha256_block_data_order void sha256_block_host_order (SHA256_CTX *ctx, const void *in, size_t num); void sha256_block_data_order (SHA256_CTX *ctx, const void *in, size_t num); #include "md32_common.h" static const uint32_t K256[64] = { 0x428a2f98UL,0x71374491UL,0xb5c0fbcfUL,0xe9b5dba5UL, 0x3956c25bUL,0x59f111f1UL,0x923f82a4UL,0xab1c5ed5UL, 0xd807aa98UL,0x12835b01UL,0x243185beUL,0x550c7dc3UL, 0x72be5d74UL,0x80deb1feUL,0x9bdc06a7UL,0xc19bf174UL, 0xe49b69c1UL,0xefbe4786UL,0x0fc19dc6UL,0x240ca1ccUL, 0x2de92c6fUL,0x4a7484aaUL,0x5cb0a9dcUL,0x76f988daUL, 0x983e5152UL,0xa831c66dUL,0xb00327c8UL,0xbf597fc7UL, 0xc6e00bf3UL,0xd5a79147UL,0x06ca6351UL,0x14292967UL, 0x27b70a85UL,0x2e1b2138UL,0x4d2c6dfcUL,0x53380d13UL, 0x650a7354UL,0x766a0abbUL,0x81c2c92eUL,0x92722c85UL, 0xa2bfe8a1UL,0xa81a664bUL,0xc24b8b70UL,0xc76c51a3UL, 0xd192e819UL,0xd6990624UL,0xf40e3585UL,0x106aa070UL, 0x19a4c116UL,0x1e376c08UL,0x2748774cUL,0x34b0bcb5UL, 0x391c0cb3UL,0x4ed8aa4aUL,0x5b9cca4fUL,0x682e6ff3UL, 0x748f82eeUL,0x78a5636fUL,0x84c87814UL,0x8cc70208UL, 0x90befffaUL,0xa4506cebUL,0xbef9a3f7UL,0xc67178f2UL }; /* * FIPS specification refers to right rotations, while our ROTATE macro * is left one. This is why you might notice that rotation coefficients * differ from those observed in FIPS document by 32-N... */ #define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10)) #define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7)) #define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3)) #define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10)) #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) #define ROUND_00_15(i,a,b,c,d,e,f,g,h) do { \ T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; \ h = Sigma0(a) + Maj(a,b,c); \ d += T1; h += T1; } while (0) #define ROUND_16_63(i,a,b,c,d,e,f,g,h,X) do { \ s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); \ s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); \ T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f]; \ ROUND_00_15(i,a,b,c,d,e,f,g,h); } while (0) static void sha256_block (SHA256_CTX *ctx, const void *in, size_t num, int host) { uint32_t a,b,c,d,e,f,g,h,s0,s1,T1; uint32_t X[16]; int i; const unsigned char *data=in; while (num--) { a = ctx->h[0]; b = ctx->h[1]; c = ctx->h[2]; d = ctx->h[3]; e = ctx->h[4]; f = ctx->h[5]; g = ctx->h[6]; h = ctx->h[7]; if (host) { const uint32_t *W=(const uint32_t *)data; T1 = X[0] = W[0]; ROUND_00_15(0,a,b,c,d,e,f,g,h); T1 = X[1] = W[1]; ROUND_00_15(1,h,a,b,c,d,e,f,g); T1 = X[2] = W[2]; ROUND_00_15(2,g,h,a,b,c,d,e,f); T1 = X[3] = W[3]; ROUND_00_15(3,f,g,h,a,b,c,d,e); T1 = X[4] = W[4]; ROUND_00_15(4,e,f,g,h,a,b,c,d); T1 = X[5] = W[5]; ROUND_00_15(5,d,e,f,g,h,a,b,c); T1 = X[6] = W[6]; ROUND_00_15(6,c,d,e,f,g,h,a,b); T1 = X[7] = W[7]; ROUND_00_15(7,b,c,d,e,f,g,h,a); T1 = X[8] = W[8]; ROUND_00_15(8,a,b,c,d,e,f,g,h); T1 = X[9] = W[9]; ROUND_00_15(9,h,a,b,c,d,e,f,g); T1 = X[10] = W[10]; ROUND_00_15(10,g,h,a,b,c,d,e,f); T1 = X[11] = W[11]; ROUND_00_15(11,f,g,h,a,b,c,d,e); T1 = X[12] = W[12]; ROUND_00_15(12,e,f,g,h,a,b,c,d); T1 = X[13] = W[13]; ROUND_00_15(13,d,e,f,g,h,a,b,c); T1 = X[14] = W[14]; ROUND_00_15(14,c,d,e,f,g,h,a,b); T1 = X[15] = W[15]; ROUND_00_15(15,b,c,d,e,f,g,h,a); data += SHA256_CBLOCK; } else { uint32_t l; HOST_c2l(data,l); T1 = X[0] = l; ROUND_00_15(0,a,b,c,d,e,f,g,h); HOST_c2l(data,l); T1 = X[1] = l; ROUND_00_15(1,h,a,b,c,d,e,f,g); HOST_c2l(data,l); T1 = X[2] = l; ROUND_00_15(2,g,h,a,b,c,d,e,f); HOST_c2l(data,l); T1 = X[3] = l; ROUND_00_15(3,f,g,h,a,b,c,d,e); HOST_c2l(data,l); T1 = X[4] = l; ROUND_00_15(4,e,f,g,h,a,b,c,d); HOST_c2l(data,l); T1 = X[5] = l; ROUND_00_15(5,d,e,f,g,h,a,b,c); HOST_c2l(data,l); T1 = X[6] = l; ROUND_00_15(6,c,d,e,f,g,h,a,b); HOST_c2l(data,l); T1 = X[7] = l; ROUND_00_15(7,b,c,d,e,f,g,h,a); HOST_c2l(data,l); T1 = X[8] = l; ROUND_00_15(8,a,b,c,d,e,f,g,h); HOST_c2l(data,l); T1 = X[9] = l; ROUND_00_15(9,h,a,b,c,d,e,f,g); HOST_c2l(data,l); T1 = X[10] = l; ROUND_00_15(10,g,h,a,b,c,d,e,f); HOST_c2l(data,l); T1 = X[11] = l; ROUND_00_15(11,f,g,h,a,b,c,d,e); HOST_c2l(data,l); T1 = X[12] = l; ROUND_00_15(12,e,f,g,h,a,b,c,d); HOST_c2l(data,l); T1 = X[13] = l; ROUND_00_15(13,d,e,f,g,h,a,b,c); HOST_c2l(data,l); T1 = X[14] = l; ROUND_00_15(14,c,d,e,f,g,h,a,b); HOST_c2l(data,l); T1 = X[15] = l; ROUND_00_15(15,b,c,d,e,f,g,h,a); } for (i=16;i<64;i+=8) { ROUND_16_63(i+0,a,b,c,d,e,f,g,h,X); ROUND_16_63(i+1,h,a,b,c,d,e,f,g,X); ROUND_16_63(i+2,g,h,a,b,c,d,e,f,X); ROUND_16_63(i+3,f,g,h,a,b,c,d,e,X); ROUND_16_63(i+4,e,f,g,h,a,b,c,d,X); ROUND_16_63(i+5,d,e,f,g,h,a,b,c,X); ROUND_16_63(i+6,c,d,e,f,g,h,a,b,X); ROUND_16_63(i+7,b,c,d,e,f,g,h,a,X); } ctx->h[0] += a; ctx->h[1] += b; ctx->h[2] += c; ctx->h[3] += d; ctx->h[4] += e; ctx->h[5] += f; ctx->h[6] += g; ctx->h[7] += h; } } /* * Idea is to trade couple of cycles for some space. On IA-32 we save * about 4K in "big footprint" case. In "small footprint" case any gain * is appreciated:-) */ void HASH_BLOCK_HOST_ORDER (SHA256_CTX *ctx, const void *in, size_t num) { sha256_block (ctx,in,num,1); } void HASH_BLOCK_DATA_ORDER (SHA256_CTX *ctx, const void *in, size_t num) { sha256_block (ctx,in,num,0); }