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|
/* crypto/sha/sha512.c */
/* ====================================================================
* Copyright (c) 2004 The OpenSSL Project. All rights reserved
* according to the OpenSSL license [found in ../../LICENSE].
* ====================================================================
*/
#if !defined(OPENSSL_NO_SHA) && !defined(OPENSSL_NO_SHA512)
/*
* IMPLEMENTATION NOTES.
*
* As you might have noticed 32-bit hash algorithms:
*
* - permit SHA_LONG to be wider than 32-bit (case on CRAY);
* - optimized versions implement two transform functions: one operating
* on [aligned] data in host byte order and one - on data in input
* stream byte order;
* - share common byte-order neutral collector and padding function
* implementations, ../md32_common.h;
*
* Neither of the above applies to this SHA-512 implementations. Reasons
* [in reverse order] are:
*
* - it's the only 64-bit hash algorithm for the moment of this writing,
* there is no need for common collector/padding implementation [yet];
* - by supporting only one transform function [which operates on
* *aligned* data in input stream byte order, big-endian in this case]
* we minimize burden of maintenance in two ways: a) collector/padding
* function is simpler; b) only one transform function to stare at;
* - SHA_LONG64 is required to be exactly 64-bit in order to be able to
* apply a number of optimizations to mitigate potential performance
* penalties caused by previous design decision;
*
* Caveat lector.
*
* Implementation relies on the fact that "long long" is 64-bit on
* both 32- and 64-bit platforms. If some compiler vendor comes up
* with 128-bit long long, adjustment to sha.h would be required.
* As this implementation relies on 64-bit integer type, it's totally
* inappropriate for platforms which don't support it, most notably
* 16-bit platforms.
* <appro@fy.chalmers.se>
*/
#include <stdlib.h>
#include <string.h>
#include <openssl/opensslconf.h>
#include <openssl/crypto.h>
#include <openssl/sha.h>
#include <openssl/opensslv.h>
#include "cryptlib.h"
const char *SHA512_version="SHA-512" OPENSSL_VERSION_PTEXT;
#if defined(_M_IX86) || defined(_M_AMD64) || defined(__i386) || defined(__x86_64)
#define SHA512_BLOCK_CAN_MANAGE_UNALIGNED_DATA
#endif
int SHA384_Init (SHA512_CTX *c)
{
c->h[0]=U64(0xcbbb9d5dc1059ed8);
c->h[1]=U64(0x629a292a367cd507);
c->h[2]=U64(0x9159015a3070dd17);
c->h[3]=U64(0x152fecd8f70e5939);
c->h[4]=U64(0x67332667ffc00b31);
c->h[5]=U64(0x8eb44a8768581511);
c->h[6]=U64(0xdb0c2e0d64f98fa7);
c->h[7]=U64(0x47b5481dbefa4fa4);
c->Nl=0; c->Nh=0;
c->num=0; c->md_len=SHA384_DIGEST_LENGTH;
return 1;
}
int SHA512_Init (SHA512_CTX *c)
{
c->h[0]=U64(0x6a09e667f3bcc908);
c->h[1]=U64(0xbb67ae8584caa73b);
c->h[2]=U64(0x3c6ef372fe94f82b);
c->h[3]=U64(0xa54ff53a5f1d36f1);
c->h[4]=U64(0x510e527fade682d1);
c->h[5]=U64(0x9b05688c2b3e6c1f);
c->h[6]=U64(0x1f83d9abfb41bd6b);
c->h[7]=U64(0x5be0cd19137e2179);
c->Nl=0; c->Nh=0;
c->num=0; c->md_len=SHA512_DIGEST_LENGTH;
return 1;
}
#ifndef SHA512_ASM
static
#endif
void sha512_block (SHA512_CTX *ctx, const void *in, size_t num);
int SHA512_Final (unsigned char *md, SHA512_CTX *c)
{
unsigned char *p=(unsigned char *)c->u.p;
size_t n=c->num;
p[n]=0x80; /* There always is a room for one */
n++;
if (n > (sizeof(c->u)-16))
memset (p+n,0,sizeof(c->u)-n), n=0,
sha512_block (c,p,1);
memset (p+n,0,sizeof(c->u)-16-n);
#ifdef B_ENDIAN
c->u.d[SHA_LBLOCK-2] = c->Nh;
c->u.d[SHA_LBLOCK-1] = c->Nl;
#else
p[sizeof(c->u)-1] = (unsigned char)(c->Nl);
p[sizeof(c->u)-2] = (unsigned char)(c->Nl>>8);
p[sizeof(c->u)-3] = (unsigned char)(c->Nl>>16);
p[sizeof(c->u)-4] = (unsigned char)(c->Nl>>24);
p[sizeof(c->u)-5] = (unsigned char)(c->Nl>>32);
p[sizeof(c->u)-6] = (unsigned char)(c->Nl>>40);
p[sizeof(c->u)-7] = (unsigned char)(c->Nl>>48);
p[sizeof(c->u)-8] = (unsigned char)(c->Nl>>56);
p[sizeof(c->u)-9] = (unsigned char)(c->Nh);
p[sizeof(c->u)-10] = (unsigned char)(c->Nh>>8);
p[sizeof(c->u)-11] = (unsigned char)(c->Nh>>16);
p[sizeof(c->u)-12] = (unsigned char)(c->Nh>>24);
p[sizeof(c->u)-13] = (unsigned char)(c->Nh>>32);
p[sizeof(c->u)-14] = (unsigned char)(c->Nh>>40);
p[sizeof(c->u)-15] = (unsigned char)(c->Nh>>48);
p[sizeof(c->u)-16] = (unsigned char)(c->Nh>>56);
#endif
sha512_block (c,p,1);
if (md==0) return 0;
switch (c->md_len)
{
/* Let compiler decide if it's appropriate to unroll... */
case SHA384_DIGEST_LENGTH:
for (n=0;n<SHA384_DIGEST_LENGTH/8;n++)
{
SHA_LONG64 t = c->h[n];
*(md++) = (unsigned char)(t>>56);
*(md++) = (unsigned char)(t>>48);
*(md++) = (unsigned char)(t>>40);
*(md++) = (unsigned char)(t>>32);
*(md++) = (unsigned char)(t>>24);
*(md++) = (unsigned char)(t>>16);
*(md++) = (unsigned char)(t>>8);
*(md++) = (unsigned char)(t);
}
break;
case SHA512_DIGEST_LENGTH:
for (n=0;n<SHA512_DIGEST_LENGTH/8;n++)
{
SHA_LONG64 t = c->h[n];
*(md++) = (unsigned char)(t>>56);
*(md++) = (unsigned char)(t>>48);
*(md++) = (unsigned char)(t>>40);
*(md++) = (unsigned char)(t>>32);
*(md++) = (unsigned char)(t>>24);
*(md++) = (unsigned char)(t>>16);
*(md++) = (unsigned char)(t>>8);
*(md++) = (unsigned char)(t);
}
break;
/* ... as well as make sure md_len is not abused. */
default: return 0;
}
return 1;
}
int SHA384_Final (unsigned char *md,<
|