/* ====================================================================
* Copyright (c) 1999-2007 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ==================================================================== */
#ifndef OPENSSL_HEADER_MD32_COMMON_H
#define OPENSSL_HEADER_MD32_COMMON_H
#include <openssl/base.h>
#if defined(__cplusplus)
extern "C" {
#endif
#define asm __asm__
/* This is a generic 32 bit "collector" for message digest algorithms.
* Whenever needed it collects input character stream into chunks of
* 32 bit values and invokes a block function that performs actual hash
* calculations.
*
* Porting guide.
*
* Obligatory macros:
*
* DATA_ORDER_IS_BIG_ENDIAN or DATA_ORDER_IS_LITTLE_ENDIAN
* this macro defines byte order of input stream.
* HASH_CBLOCK
* size of a unit chunk HASH_BLOCK operates on.
* HASH_LONG
* has to be at least 32 bit wide.
* HASH_CTX
* context structure that at least contains following
* members:
* typedef struct {
* ...
* HASH_LONG Nl,Nh;
* either {
* HASH_LONG data[HASH_LBLOCK];
* unsigned char data[HASH_CBLOCK];
* };
* unsigned int num;
* ...
* } HASH_CTX;
* data[] vector is expected to be zeroed upon first call to
* HASH_UPDATE.
* HASH_UPDATE
* name of "Update" function, implemented here.
* HASH_TRANSFORM
* name of "Transform" function, implemented here.
* HASH_FINAL
* name of "Final" function, implemented here.
* HASH_BLOCK_DATA_ORDER
* name of "block" function capable of treating *unaligned* input
* message in original (data) byte order, implemented externally.
* HASH_MAKE_STRING
* macro convering context variables to an ASCII hash string.
*
* <appro@fy.chalmers.se>
*/
#if !defined(DATA_ORDER_IS_BIG_ENDIAN) && !defined(DATA_ORDER_IS_LITTLE_ENDIAN)
#error "DATA_ORDER must be defined!"
#endif
#ifndef HASH_CBLOCK
#error "HASH_CBLOCK must be defined!"
#endif
#ifndef HASH_LONG
#error "HASH_LONG must be defined!"
#endif
#ifndef HASH_CTX
#error "HASH_CTX must be defined!"
#endif
#ifndef HASH_UPDATE
#error "HASH_UPDATE must be defined!"
#endif
#ifndef HASH_TRANSFORM
#error "HASH_TRANSFORM must be defined!"
#endif
#ifndef HASH_FINAL
#error "HASH_FINAL must be defined!"
#endif
#ifndef HASH_BLOCK_DATA_ORDER
#error "HASH_BLOCK_DATA_ORDER must be defined!"
#endif
/*
* Engage compiler specific rotate intrinsic function if available.
*/
#undef ROTATE
# if defined(_MSC_VER)
# define ROTATE(a,n) _lrotl(a,n)
# elif defined(__ICC)
# define ROTATE(a,n) _rotl(a,n)
# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM)
/*
* Some GNU C inline assembler templates. Note that these are
* rotates by *constant* number of bits! But that's exactly
* what we need here...
* <appro@fy.chalmers.se>
*/
# if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
# define ROTATE(a,n) ({ register uint32_t ret; \
asm ( \
"roll %1,%0" \
: "=r"(ret) \
: "I"(n), "0"((uint32_t)(a)) \
: "cc"); \
ret; \
})
# endif /* OPENSSL_X86 || OPENSSL_X86_64 */
# endif /* COMPILER */
#ifndef ROTATE
#define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
#endif
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
#ifndef PEDANTIC
# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM)
# if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
/*
* This gives ~30-40% performance improvement in SHA-256 compiled
* with gcc [on P4]. Well, first macro to be frank. We can pull
* this trick on x86* platforms only, because these CPUs can fetch
* unaligned data without raising an exception.
*/
# define HOST_c2l(c,l) ({ uint32_t r=*((const uint32_t *)(c)); \
asm ("bswapl %0":"=r"(r):"0"(r)); \
(c)+=4; (l)=r; })
# define HOST_l2c(l,c) ({ uint32_t r=(l); \
asm ("bswapl %0":"=r"(r):"0"(r)); \
*((uint32_t *)(c))=r; (c)+=4; r; })
# elif defined(__aarch64__)
# if defined(__BYTE_ORDER__)
# if defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__
# define HOST_c2l(c,l) ({ uint32_t r; \
asm ("rev %w0,%w1" \
:"=r"(r) \
:"r"(*((const uint32_t *)(c))));\
(c)+=4; (l)=r; })
# define HOST_l2c(l,c) ({ uint32_t r; \
asm ("rev %w0,%w1" \
:"=r"(r) \
:"r"((uint32_t)(l))); \
*((uint32_t *)(c))=r; (c)+=4; r; })
# elif defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__==__ORDER_BIG_ENDIAN__
# define HOST_c2l(c,l) (void)((l)=*((const uint32_t *)(c)), (c)+=4)
# define HOST_l2c(l,c) (*((uint32_t *)(c))=(l), (c)+=4, (l))
# endif
# endif
# endif
# endif
#endif
#ifndef HOST_c2l
#define HOST_c2l(c,l) (void)(l =(((uint32_t)(*((c)++)))<<24), \
l|=(((uint32_t)(*((c)++)))<<16), \
l|=(((uint32_t)(*((c)++)))<< 8), \
l|=(((uint32_t)(*((c)++))) ))
#endif
#ifndef HOST_l2c
#define HOST_l2c(l,c) (*((c)++)=(uint8_t)(((l)>>24)&0xff), \
*((c)++)=(uint8_t)(((l)>>16)&0xff), \
*((c)++)=(uint8_t)(((l)>> 8)&0xff), \
*((c)++)=(uint8_t)(((l) )&0xff), \
l)
#endif
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
/* See comment in DATA_ORDER_IS_BIG_ENDIAN section. */
# define HOST_c2l(c,l) (void)((l)=*((const uint32_t *)(c)), (c)+=4)
# define HOST_l2c(l,c) (*((uint32_t *)(c))=(l), (c)+=4, l)
#endif
#ifndef HOST_c2l
#define HOST_c2l(c,l) (void)(l =(((uint32_t)(*((c)++))) ), \
l|=(((uint32_t)(*((c)++)))<< 8), \
l|=(((uint32_t)(*((c)++)))<<16), \
l|=(((uint32_t)(*((c)++)))<<24))
#endif
#ifndef HOST_l2c
#define HOST_l2c(l,c) (*((c)++)=(uint8_t)(((l) )&0xff), \
*((c)++)=(uint8_t)(((l)>> 8)&0xff), \
*((c)++)=(uint8_t)(((l)>>16)&0xff), \
*((c)++)=(uint8_t)(((l)>>24)&0xff), \
l)
#endif
#endif
int HASH_UPDATE (HASH_CTX *c, const void *data_, size_t len)
{
const uint8_t *data=data_;
uint8_t *p;
HASH_LONG l;
size_t n;
if (len==0) return 1;
l=(c->Nl+(((HASH_LONG)len)<<3))&0xffffffffUL;
/* 95-05-24 eay Fixed a bug with the overflow handling, thanks to
* Wei Dai <weidai@eskimo.com> for pointing it out. */
if (l < c->Nl) /* overflow */
c->Nh++;
c->Nh+=(HASH_LONG)(len>>29); /* might cause compiler warning on 16-bit */
c->Nl=l;
n = c->num;
if (n != 0)
{
p=(uint8_t *)c->data;
if (len >= HASH_CBLOCK || len+n >= HASH_CBLOCK)
{
memcpy (p+n,data,HASH_CBLOCK-n);
HASH_BLOCK_DATA_ORDER (c,p,1);
n = HASH_CBLOCK-n;
data += n;
len -= n;
c->num = 0;
memset (p,0,HASH_CBLOCK); /* keep it zeroed */
}
else
{
memcpy (p+n,data,len);
c->num += (unsigned int)len;
return 1;
}
}
n = len/HASH_CBLOCK;
if (n > 0)
{
HASH_BLOCK_DATA_ORDER (c,data,n);
n *= HASH_CBLOCK;
data += n;
len -= n;
}
if (len != 0)
{
p = (uint8_t *)c->data;
c->num = (unsigned int)len;
memcpy (p,data,len);
}
return 1;
}
void HASH_TRANSFORM (HASH_CTX *c, const uint8_t *data)
{
HASH_BLOCK_DATA_ORDER (c,data,1);
}
int HASH_FINAL (uint8_t *md, HASH_CTX *c)
{
uint8_t *p = (uint8_t *)c->data;
size_t n = c->num;
p[n] = 0x80; /* there is always room for one */
n++;
if (n > (HASH_CBLOCK-8))
{
memset (p+n,0,HASH_CBLOCK-n);
n=0;
HASH_BLOCK_DATA_ORDER (c,p,1);
}
memset (p+n,0,HASH_CBLOCK-8-n);
p += HASH_CBLOCK-8;
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
(void)HOST_l2c(c->Nh,p);
(void)HOST_l2c(c->Nl,p);
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
(void)HOST_l2c(c->Nl,p);
(void)HOST_l2c(c->Nh,p);
#endif
p -= HASH_CBLOCK;
HASH_BLOCK_DATA_ORDER (c,p,1);
c->num=0;
memset (p,0,HASH_CBLOCK);
#ifndef HASH_MAKE_STRING
#error "HASH_MAKE_STRING must be defined!"
#else
HASH_MAKE_STRING(c,md);
#endif
return 1;
}
#if defined(__cplusplus)
} /* extern C */
#endif
#endif /* OPENSSL_HEADER_MD32_COMMON_H */
