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/* crypto/sha/sha256.c */
/* ====================================================================
* Copyright (c) 2004 The OpenSSL Project. All rights reserved
* according to the OpenSSL license [found in ../../LICENSE].
* ====================================================================
*/
#include <openssl/opensslconf.h>
#if !defined(OPENSSL_NO_SHA) && !defined(OPENSSL_NO_SHA256)
# include <stdlib.h>
# include <string.h>
# include <openssl/crypto.h>
# include <openssl/sha.h>
# include <openssl/opensslv.h>
const char SHA256_version[] = "SHA-256" OPENSSL_VERSION_PTEXT;
fips_md_init_ctx(SHA224, SHA256)
{
memset(c, 0, sizeof(*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->md_len = SHA224_DIGEST_LENGTH;
return 1;
}
fips_md_init(SHA256)
{
memset(c, 0, sizeof(*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->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);
OPENSSL_cleanse(&c, sizeof(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);
OPENSSL_cleanse(&c, sizeof(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 SHA_LONG
# define HASH_CTX SHA256_CTX
# define HASH_CBLOCK SHA_CBLOCK
/*
* 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 nn; \
switch ((c)->md_len) \
{ case SHA224_DIGEST_LENGTH: \
for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++) \
{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
break; \
case SHA256_DIGEST_LENGTH: \
for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++) \
{ ll=(c)->h[nn]; (void)HOST_l2c(ll,(s)); } \
break; \
default: \
if ((c)->md_len > SHA256_DIGEST_LENGTH) \
return 0; \
for (nn=0;nn<(c)->md_len/4;nn++) \
{ ll=(c)->h[nn]; (void)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_DATA_ORDER sha256_block_data_order
# ifndef SHA256_ASM
static
# endif
void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num);
# include "md32_common.h"
# ifndef SHA256_ASM
static const SHA_LONG 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)))
# ifdef OPENSSL_SMALL_FOOTPRINT
static void sha256_block_data_order(SHA256_CTX *ctx, const void *in,
size_t num)
{
unsigned MD32_REG_T a, b, c, d, e, f, g, h, s0, s1, T1, T2;
SHA_LONG X[16], l;
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];
for (i = 0; i < 16; i++) {
HOST_c2l(data, l);
T1 = X[i] = l;
T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
T2 = Sigma0(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
}
for (; i < 64; i++) {
s0 = X[(i + 1) & 0x0f];
s0 = sigma0(s0);
s1 = X[(i + 14) & 0x0f];
s1 = sigma1(s1);
T1 = X[i & 0xf] += s0 + s1 + X[(i + 9) & 0xf];
T1 += h + Sigma1(e) + Ch(e, f, g) + K256[i];
T2 = Sigma0(a) + Maj(a, b, c);
h = g;
g = f;
f = e;
e = d + T1;
d = c;
c = b;
b = a;
a = T1 + T2;
}
ctx->h[0] += a;
ctx->h[1] += b;
ctx-><
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