/* crypto/sha/sha256.c */
/* ====================================================================
- * Copyright (c) 2004 The OpenSSL Project. All rights reserved.
+ * 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/opensslconf.h>
#include <openssl/crypto.h>
#include <openssl/sha.h>
#include <openssl/opensslv.h>
int SHA224_Init (SHA256_CTX *c)
{
+ 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->Nl=0; c->Nh=0;
- c->num=0;
- return 1;
+ c->md_len=SHA224_DIGEST_LENGTH;
+ return 1;
}
int SHA256_Init (SHA256_CTX *c)
{
+ 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->Nl=0; c->Nh=0;
- c->num=0;
- return 1;
+ 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[SHA256_DIGEST_LENGTH];
+ static unsigned char m[SHA224_DIGEST_LENGTH];
+ if (md == NULL) md=m;
SHA224_Init(&c);
SHA256_Update(&c,d,n);
- SHA256_Final(m,&c);
- if (md != NULL) memcpy (md,m,SHA224_DIGEST_LENGTH),
- memset (m,0,sizeof(m));
- else md=m,
- memset (m+SHA224_DIGEST_LENGTH,0,sizeof(m)-SHA256_DIGEST_LENGTH);
+ SHA256_Final(md,&c);
OPENSSL_cleanse(&c,sizeof(c));
return(md);
}
return(md);
}
-#ifndef SHA_LONG_LOG2
-#define SHA_LONG_LOG2 2 /* default to 32 bits */
-#endif
+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_LONG_LOG2 SHA_LONG_LOG2
#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; \
- ll=(c)->h[0]; HOST_l2c(ll,(s)); ll=(c)->h[1]; HOST_l2c(ll,(s)); \
- ll=(c)->h[2]; HOST_l2c(ll,(s)); ll=(c)->h[3]; HOST_l2c(ll,(s)); \
- ll=(c)->h[4]; HOST_l2c(ll,(s)); ll=(c)->h[5]; HOST_l2c(ll,(s)); \
- ll=(c)->h[6]; HOST_l2c(ll,(s)); ll=(c)->h[7]; HOST_l2c(ll,(s)); \
+ unsigned int nn; \
+ switch ((c)->md_len) \
+ { case SHA224_DIGEST_LENGTH: \
+ for (nn=0;nn<SHA224_DIGEST_LENGTH/4;nn++) \
+ { ll=(c)->h[nn]; HOST_l2c(ll,(s)); } \
+ break; \
+ case SHA256_DIGEST_LENGTH: \
+ for (nn=0;nn<SHA256_DIGEST_LENGTH/4;nn++) \
+ { ll=(c)->h[nn]; 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]; 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);
+#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,
#ifdef OPENSSL_SMALL_FOOTPRINT
-static void sha256_block (SHA256_CTX *ctx, const void *in, size_t num, int host)
+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];
+ 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];
- if (host)
- {
- const SHA_LONG *W=in;
-
- for (i=0;i<16;i++)
- {
- T1 = X[i] = W[i];
- 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;
- }
- }
- else
+ for (i=0;i<16;i++)
{
- const unsigned char *data=in;
- SHA_LONG l;
-
- 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;
- }
+ 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++)
#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]; \
+ 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)
+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;
SHA_LONG X[16];
int i;
+ const unsigned char *data=in;
+ const union { long one; char little; } is_endian = {1};
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)
+ if (!is_endian.little && sizeof(SHA_LONG)==4 && ((size_t)in%4)==0)
{
- const SHA_LONG *W=in;
+ const SHA_LONG *W=(const SHA_LONG *)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[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
{
- const unsigned char *data=in;
SHA_LONG l;
HOST_c2l(data,l); T1 = X[0] = l; ROUND_00_15(0,a,b,c,d,e,f,g,h);
}
#endif
+#endif /* SHA256_ASM */
-/*
- * 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); }
+#endif /* OPENSSL_NO_SHA256 */
projects / openssl.git / blobdiff