388 lines
12 KiB
C
388 lines
12 KiB
C
/* crypto/sha/sha256.c */
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/* ====================================================================
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* Copyright (c) 2004 The OpenSSL Project. All rights reserved
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* according to the OpenSSL license [found in ../../LICENSE].
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* ====================================================================
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*/
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#include <openssl/opensslconf.h>
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#if !defined(OPENSSL_NO_SHA) && !defined(OPENSSL_NO_SHA256)
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# include <stdlib.h>
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# include <string.h>
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# include <openssl/crypto.h>
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# include <openssl/sha.h>
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# include <openssl/opensslv.h>
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const char SHA256_version[] = "SHA-256" OPENSSL_VERSION_PTEXT;
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fips_md_init_ctx(SHA224, SHA256)
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{
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memset(c, 0, sizeof(*c));
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c->h[0] = 0xc1059ed8UL;
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c->h[1] = 0x367cd507UL;
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c->h[2] = 0x3070dd17UL;
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c->h[3] = 0xf70e5939UL;
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c->h[4] = 0xffc00b31UL;
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c->h[5] = 0x68581511UL;
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c->h[6] = 0x64f98fa7UL;
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c->h[7] = 0xbefa4fa4UL;
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c->md_len = SHA224_DIGEST_LENGTH;
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return 1;
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}
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fips_md_init(SHA256)
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{
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memset(c, 0, sizeof(*c));
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c->h[0] = 0x6a09e667UL;
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c->h[1] = 0xbb67ae85UL;
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c->h[2] = 0x3c6ef372UL;
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c->h[3] = 0xa54ff53aUL;
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c->h[4] = 0x510e527fUL;
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c->h[5] = 0x9b05688cUL;
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c->h[6] = 0x1f83d9abUL;
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c->h[7] = 0x5be0cd19UL;
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c->md_len = SHA256_DIGEST_LENGTH;
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return 1;
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}
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unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md)
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{
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SHA256_CTX c;
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static unsigned char m[SHA224_DIGEST_LENGTH];
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if (md == NULL)
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md = m;
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SHA224_Init(&c);
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SHA256_Update(&c, d, n);
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SHA256_Final(md, &c);
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OPENSSL_cleanse(&c, sizeof(c));
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return (md);
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}
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unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md)
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{
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SHA256_CTX c;
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static unsigned char m[SHA256_DIGEST_LENGTH];
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if (md == NULL)
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md = m;
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SHA256_Init(&c);
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SHA256_Update(&c, d, n);
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SHA256_Final(md, &c);
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OPENSSL_cleanse(&c, sizeof(c));
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return (md);
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}
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int SHA224_Update(SHA256_CTX *c, const void *data, size_t len)
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{
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return SHA256_Update(c, data, len);
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}
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int SHA224_Final(unsigned char *md, SHA256_CTX *c)
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{
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return SHA256_Final(md, c);
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}
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# define DATA_ORDER_IS_BIG_ENDIAN
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# define HASH_LONG SHA_LONG
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# define HASH_CTX SHA256_CTX
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# define HASH_CBLOCK SHA_CBLOCK
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/*
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* Note that FIPS180-2 discusses "Truncation of the Hash Function Output."
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* default: case below covers for it. It's not clear however if it's
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* permitted to truncate to amount of bytes not divisible by 4. I bet not,
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* but if it is, then default: case shall be extended. For reference.
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* Idea behind separate cases for pre-defined lenghts is to let the
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* compiler decide if it's appropriate to unroll small loops.
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*/
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# define HASH_MAKE_STRING(c,s) do { \
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unsigned long ll; \
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unsigned int nn; \
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switch ((c)->md_len) \
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{ case SHA224_DIGEST_LENGTH: \
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for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++) \
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{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
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break; \
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case SHA256_DIGEST_LENGTH: \
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for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++) \
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{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
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break; \
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default: \
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if ((c)->md_len > SHA256_DIGEST_LENGTH) \
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return 0; \
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for (nn=0;nn<(c)->md_len/4;nn++) \
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{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
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break; \
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} \
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} while (0)
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# define HASH_UPDATE SHA256_Update
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# define HASH_TRANSFORM SHA256_Transform
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# define HASH_FINAL SHA256_Final
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# define HASH_BLOCK_DATA_ORDER sha256_block_data_order
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# ifndef SHA256_ASM
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static
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# endif
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void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num);
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# include "md32_common.h"
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# ifndef SHA256_ASM
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static const SHA_LONG K256[64] = {
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0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
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0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
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0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
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0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
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0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
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0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
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0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
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0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
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0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
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0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
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0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
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0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
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0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
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0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
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0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
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0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
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};
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/*
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* FIPS specification refers to right rotations, while our ROTATE macro
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* is left one. This is why you might notice that rotation coefficients
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* differ from those observed in FIPS document by 32-N...
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*/
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# define Sigma0(x) (ROTATE((x),30) ^ ROTATE((x),19) ^ ROTATE((x),10))
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# define Sigma1(x) (ROTATE((x),26) ^ ROTATE((x),21) ^ ROTATE((x),7))
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# define sigma0(x) (ROTATE((x),25) ^ ROTATE((x),14) ^ ((x)>>3))
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# define sigma1(x) (ROTATE((x),15) ^ ROTATE((x),13) ^ ((x)>>10))
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# define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
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# define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
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# ifdef OPENSSL_SMALL_FOOTPRINT
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static void sha256_block_data_order(SHA256_CTX *ctx, const void *in,
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size_t num)
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{
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unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1, T2;
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SHA_LONG X[16], l;
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int i;
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const unsigned char *data = in;
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while (num--) {
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a = ctx->h[0];
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b = ctx->h[1];
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c = ctx->h[2];
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d = ctx->h[3];
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e = ctx->h[4];
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f = ctx->h[5];
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g = ctx->h[6];
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h = ctx->h[7];
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for (i = 0; i < 16; i++) {
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HOST_c2l(data, l);
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T1 = X[i] = l;
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T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
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T2 = Sigma0(a) + Maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + T1;
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d = c;
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c = b;
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b = a;
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a = T1 + T2;
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}
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for (; i < 64; i++) {
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s0 = X[(i + 1) & 0x0f];
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s0 = sigma0(s0);
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s1 = X[(i + 14) & 0x0f];
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s1 = sigma1(s1);
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T1 = X[i & 0xf] += s0 + s1 + X[(i + 9) & 0xf];
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T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
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T2 = Sigma0(a) + Maj(a, b, c);
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h = g;
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g = f;
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f = e;
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e = d + T1;
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d = c;
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c = b;
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b = a;
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a = T1 + T2;
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}
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ctx->h[0] += a;
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ctx->h[1] += b;
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ctx->h[2] += c;
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ctx->h[3] += d;
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ctx->h[4] += e;
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ctx->h[5] += f;
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ctx->h[6] += g;
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ctx->h[7] += h;
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}
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}
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# else
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# define ROUND_00_15(i,a,b,c,d,e,f,g,h) do { \
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T1 += h + Sigma1(e) + Ch(e,f,g) + K256[i]; \
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h = Sigma0(a) + Maj(a,b,c); \
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d += T1; h += T1; } while (0)
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# define ROUND_16_63(i,a,b,c,d,e,f,g,h,X) do { \
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s0 = X[(i+1)&0x0f]; s0 = sigma0(s0); \
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s1 = X[(i+14)&0x0f]; s1 = sigma1(s1); \
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T1 = X[(i)&0x0f] += s0 + s1 + X[(i+9)&0x0f]; \
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ROUND_00_15(i,a,b,c,d,e,f,g,h); } while (0)
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static void sha256_block_data_order(SHA256_CTX *ctx, const void *in,
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size_t num)
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{
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unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1;
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SHA_LONG X[16];
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int i;
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const unsigned char *data = in;
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const union {
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long one;
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char little;
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} is_endian = {
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1
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};
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while (num--) {
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a = ctx->h[0];
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b = ctx->h[1];
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c = ctx->h[2];
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d = ctx->h[3];
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e = ctx->h[4];
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f = ctx->h[5];
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g = ctx->h[6];
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h = ctx->h[7];
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if (!is_endian.little && sizeof(SHA_LONG) == 4
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&& ((size_t)in % 4) == 0) {
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const SHA_LONG *W = (const SHA_LONG *)data;
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T1 = X[0] = W[0];
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ROUND_00_15(0, a, b, c, d, e, f, g, h);
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T1 = X[1] = W[1];
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ROUND_00_15(1, h, a, b, c, d, e, f, g);
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T1 = X[2] = W[2];
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ROUND_00_15(2, g, h, a, b, c, d, e, f);
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T1 = X[3] = W[3];
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ROUND_00_15(3, f, g, h, a, b, c, d, e);
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T1 = X[4] = W[4];
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ROUND_00_15(4, e, f, g, h, a, b, c, d);
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T1 = X[5] = W[5];
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ROUND_00_15(5, d, e, f, g, h, a, b, c);
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T1 = X[6] = W[6];
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ROUND_00_15(6, c, d, e, f, g, h, a, b);
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T1 = X[7] = W[7];
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ROUND_00_15(7, b, c, d, e, f, g, h, a);
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T1 = X[8] = W[8];
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ROUND_00_15(8, a, b, c, d, e, f, g, h);
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T1 = X[9] = W[9];
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ROUND_00_15(9, h, a, b, c, d, e, f, g);
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T1 = X[10] = W[10];
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ROUND_00_15(10, g, h, a, b, c, d, e, f);
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T1 = X[11] = W[11];
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ROUND_00_15(11, f, g, h, a, b, c, d, e);
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T1 = X[12] = W[12];
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ROUND_00_15(12, e, f, g, h, a, b, c, d);
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T1 = X[13] = W[13];
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ROUND_00_15(13, d, e, f, g, h, a, b, c);
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T1 = X[14] = W[14];
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ROUND_00_15(14, c, d, e, f, g, h, a, b);
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T1 = X[15] = W[15];
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ROUND_00_15(15, b, c, d, e, f, g, h, a);
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data += SHA256_CBLOCK;
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} else {
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SHA_LONG l;
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HOST_c2l(data, l);
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T1 = X[0] = l;
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ROUND_00_15(0, a, b, c, d, e, f, g, h);
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HOST_c2l(data, l);
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T1 = X[1] = l;
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ROUND_00_15(1, h, a, b, c, d, e, f, g);
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HOST_c2l(data, l);
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T1 = X[2] = l;
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ROUND_00_15(2, g, h, a, b, c, d, e, f);
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HOST_c2l(data, l);
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T1 = X[3] = l;
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ROUND_00_15(3, f, g, h, a, b, c, d, e);
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HOST_c2l(data, l);
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T1 = X[4] = l;
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ROUND_00_15(4, e, f, g, h, a, b, c, d);
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HOST_c2l(data, l);
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T1 = X[5] = l;
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ROUND_00_15(5, d, e, f, g, h, a, b, c);
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HOST_c2l(data, l);
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T1 = X[6] = l;
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ROUND_00_15(6, c, d, e, f, g, h, a, b);
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HOST_c2l(data, l);
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T1 = X[7] = l;
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ROUND_00_15(7, b, c, d, e, f, g, h, a);
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HOST_c2l(data, l);
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T1 = X[8] = l;
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ROUND_00_15(8, a, b, c, d, e, f, g, h);
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HOST_c2l(data, l);
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T1 = X[9] = l;
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ROUND_00_15(9, h, a, b, c, d, e, f, g);
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HOST_c2l(data, l);
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T1 = X[10] = l;
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ROUND_00_15(10, g, h, a, b, c, d, e, f);
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HOST_c2l(data, l);
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T1 = X[11] = l;
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ROUND_00_15(11, f, g, h, a, b, c, d, e);
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HOST_c2l(data, l);
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T1 = X[12] = l;
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ROUND_00_15(12, e, f, g, h, a, b, c, d);
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HOST_c2l(data, l);
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T1 = X[13] = l;
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ROUND_00_15(13, d, e, f, g, h, a, b, c);
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HOST_c2l(data, l);
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T1 = X[14] = l;
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ROUND_00_15(14, c, d, e, f, g, h, a, b);
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HOST_c2l(data, l);
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T1 = X[15] = l;
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ROUND_00_15(15, b, c, d, e, f, g, h, a);
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}
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for (i = 16; i < 64; i += 8) {
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ROUND_16_63(i + 0, a, b, c, d, e, f, g, h, X);
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ROUND_16_63(i + 1, h, a, b, c, d, e, f, g, X);
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ROUND_16_63(i + 2, g, h, a, b, c, d, e, f, X);
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ROUND_16_63(i + 3, f, g, h, a, b, c, d, e, X);
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ROUND_16_63(i + 4, e, f, g, h, a, b, c, d, X);
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ROUND_16_63(i + 5, d, e, f, g, h, a, b, c, X);
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ROUND_16_63(i + 6, c, d, e, f, g, h, a, b, X);
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ROUND_16_63(i + 7, b, c, d, e, f, g, h, a, X);
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}
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ctx->h[0] += a;
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ctx->h[1] += b;
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ctx->h[2] += c;
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ctx->h[3] += d;
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ctx->h[4] += e;
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ctx->h[5] += f;
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ctx->h[6] += g;
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ctx->h[7] += h;
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}
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}
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# endif
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# endif /* SHA256_ASM */
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#endif /* OPENSSL_NO_SHA256 */
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