mirror of
https://github.com/openssl/openssl.git
synced 2024-12-30 12:23:45 +08:00
610 lines
17 KiB
C
610 lines
17 KiB
C
/* crypto/md32_common.h */
|
|
/* ====================================================================
|
|
* Copyright (c) 1999 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.
|
|
* ====================================================================
|
|
*
|
|
* This product includes cryptographic software written by Eric Young
|
|
* (eay@cryptsoft.com). This product includes software written by Tim
|
|
* Hudson (tjh@cryptsoft.com).
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* 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 lest 32 bit wide, if it's wider, then
|
|
* HASH_LONG_LOG2 *has to* be defined along
|
|
* HASH_CTX
|
|
* context structure that at least contains following
|
|
* members:
|
|
* typedef struct {
|
|
* ...
|
|
* HASH_LONG Nl,Nh;
|
|
* HASH_LONG data[HASH_LBLOCK];
|
|
* int num;
|
|
* ...
|
|
* } HASH_CTX;
|
|
* 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_HOST_ORDER
|
|
* name of "block" function treating *aligned* input message
|
|
* in host byte order, implemented externally.
|
|
* HASH_BLOCK_DATA_ORDER
|
|
* name of "block" function treating *unaligned* input message
|
|
* in original (data) byte order, implemented externally (it
|
|
* actually is optional if data and host are of the same
|
|
* "endianess").
|
|
* HASH_MAKE_STRING
|
|
* macro convering context variables to an ASCII hash string.
|
|
*
|
|
* Optional macros:
|
|
*
|
|
* B_ENDIAN or L_ENDIAN
|
|
* defines host byte-order.
|
|
* HASH_LONG_LOG2
|
|
* defaults to 2 if not states otherwise.
|
|
* HASH_LBLOCK
|
|
* assumed to be HASH_CBLOCK/4 if not stated otherwise.
|
|
* HASH_BLOCK_DATA_ORDER_ALIGNED
|
|
* alternative "block" function capable of treating
|
|
* aligned input message in original (data) order,
|
|
* implemented externally.
|
|
*
|
|
* MD5 example:
|
|
*
|
|
* #define DATA_ORDER_IS_LITTLE_ENDIAN
|
|
*
|
|
* #define HASH_LONG MD5_LONG
|
|
* #define HASH_LONG_LOG2 MD5_LONG_LOG2
|
|
* #define HASH_CTX MD5_CTX
|
|
* #define HASH_CBLOCK MD5_CBLOCK
|
|
* #define HASH_LBLOCK MD5_LBLOCK
|
|
* #define HASH_UPDATE MD5_Update
|
|
* #define HASH_TRANSFORM MD5_Transform
|
|
* #define HASH_FINAL MD5_Final
|
|
* #define HASH_BLOCK_HOST_ORDER md5_block_host_order
|
|
* #define HASH_BLOCK_DATA_ORDER md5_block_data_order
|
|
*
|
|
* <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_HOST_ORDER
|
|
#error "HASH_BLOCK_HOST_ORDER must be defined!"
|
|
#endif
|
|
|
|
#if 0
|
|
/*
|
|
* Moved below as it's required only if HASH_BLOCK_DATA_ORDER_ALIGNED
|
|
* isn't defined.
|
|
*/
|
|
#ifndef HASH_BLOCK_DATA_ORDER
|
|
#error "HASH_BLOCK_DATA_ORDER must be defined!"
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef HASH_LBLOCK
|
|
#define HASH_LBLOCK (HASH_CBLOCK/4)
|
|
#endif
|
|
|
|
#ifndef HASH_LONG_LOG2
|
|
#define HASH_LONG_LOG2 2
|
|
#endif
|
|
|
|
/*
|
|
* Engage compiler specific rotate intrinsic function if available.
|
|
*/
|
|
#undef ROTATE
|
|
#ifndef PEDANTIC
|
|
# if 0 /* defined(_MSC_VER) */
|
|
# define ROTATE(a,n) _lrotl(a,n)
|
|
# elif defined(__MWERKS__)
|
|
# if defined(__POWERPC__)
|
|
# define ROTATE(a,n) __rlwinm(a,n,0,31)
|
|
# elif defined(__MC68K__)
|
|
/* Motorola specific tweak. <appro@fy.chalmers.se> */
|
|
# define ROTATE(a,n) ( n<24 ? __rol(a,n) : __ror(a,32-n) )
|
|
# else
|
|
# define ROTATE(a,n) __rol(a,n)
|
|
# endif
|
|
# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_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(__i386) || defined(__i386__)
|
|
# define ROTATE(a,n) ({ register unsigned int ret; \
|
|
asm ( \
|
|
"roll %1,%0" \
|
|
: "=r"(ret) \
|
|
: "I"(n), "0"(a) \
|
|
: "cc"); \
|
|
ret; \
|
|
})
|
|
# elif defined(__powerpc) || defined(__ppc)
|
|
# define ROTATE(a,n) ({ register unsigned int ret; \
|
|
asm ( \
|
|
"rlwinm %0,%1,%2,0,31" \
|
|
: "=r"(ret) \
|
|
: "r"(a), "I"(n)); \
|
|
ret; \
|
|
})
|
|
# endif
|
|
# endif
|
|
|
|
/*
|
|
* Engage compiler specific "fetch in reverse byte order"
|
|
* intrinsic function if available.
|
|
*/
|
|
# if defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
|
|
/* some GNU C inline assembler templates by <appro@fy.chalmers.se> */
|
|
# if (defined(__i386) || defined(__i386__)) && !defined(I386_ONLY)
|
|
# define BE_FETCH32(a) ({ register unsigned int l=(a);\
|
|
asm ( \
|
|
"bswapl %0" \
|
|
: "=r"(l) : "0"(l)); \
|
|
l; \
|
|
})
|
|
# elif defined(__powerpc)
|
|
# define LE_FETCH32(a) ({ register unsigned int l; \
|
|
asm ( \
|
|
"lwbrx %0,0,%1" \
|
|
: "=r"(l) \
|
|
: "r"(a)); \
|
|
l; \
|
|
})
|
|
|
|
# elif defined(__sparc) && defined(OPENSSL_SYS_ULTRASPARC)
|
|
# define LE_FETCH32(a) ({ register unsigned int l; \
|
|
asm ( \
|
|
"lda [%1]#ASI_PRIMARY_LITTLE,%0"\
|
|
: "=r"(l) \
|
|
: "r"(a)); \
|
|
l; \
|
|
})
|
|
# endif
|
|
# endif
|
|
#endif /* PEDANTIC */
|
|
|
|
#if HASH_LONG_LOG2==2 /* Engage only if sizeof(HASH_LONG)== 4 */
|
|
/* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */
|
|
#ifdef ROTATE
|
|
/* 5 instructions with rotate instruction, else 9 */
|
|
#define REVERSE_FETCH32(a,l) ( \
|
|
l=*(const HASH_LONG *)(a), \
|
|
((ROTATE(l,8)&0x00FF00FF)|(ROTATE((l&0x00FF00FF),24))) \
|
|
)
|
|
#else
|
|
/* 6 instructions with rotate instruction, else 8 */
|
|
#define REVERSE_FETCH32(a,l) ( \
|
|
l=*(const HASH_LONG *)(a), \
|
|
l=(((l>>8)&0x00FF00FF)|((l&0x00FF00FF)<<8)), \
|
|
ROTATE(l,16) \
|
|
)
|
|
/*
|
|
* Originally the middle line started with l=(((l&0xFF00FF00)>>8)|...
|
|
* It's rewritten as above for two reasons:
|
|
* - RISCs aren't good at long constants and have to explicitely
|
|
* compose 'em with several (well, usually 2) instructions in a
|
|
* register before performing the actual operation and (as you
|
|
* already realized:-) having same constant should inspire the
|
|
* compiler to permanently allocate the only register for it;
|
|
* - most modern CPUs have two ALUs, but usually only one has
|
|
* circuitry for shifts:-( this minor tweak inspires compiler
|
|
* to schedule shift instructions in a better way...
|
|
*
|
|
* <appro@fy.chalmers.se>
|
|
*/
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef ROTATE
|
|
#define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
|
|
#endif
|
|
|
|
/*
|
|
* Make some obvious choices. E.g., HASH_BLOCK_DATA_ORDER_ALIGNED
|
|
* and HASH_BLOCK_HOST_ORDER ought to be the same if input data
|
|
* and host are of the same "endianess". It's possible to mask
|
|
* this with blank #define HASH_BLOCK_DATA_ORDER though...
|
|
*
|
|
* <appro@fy.chalmers.se>
|
|
*/
|
|
#if defined(B_ENDIAN)
|
|
# if defined(DATA_ORDER_IS_BIG_ENDIAN)
|
|
# if !defined(HASH_BLOCK_DATA_ORDER_ALIGNED) && HASH_LONG_LOG2==2
|
|
# define HASH_BLOCK_DATA_ORDER_ALIGNED HASH_BLOCK_HOST_ORDER
|
|
# endif
|
|
# elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
# ifndef HOST_FETCH32
|
|
# ifdef LE_FETCH32
|
|
# define HOST_FETCH32(p,l) LE_FETCH32(p)
|
|
# elif defined(REVERSE_FETCH32)
|
|
# define HOST_FETCH32(p,l) REVERSE_FETCH32(p,l)
|
|
# endif
|
|
# endif
|
|
# endif
|
|
#elif defined(L_ENDIAN)
|
|
# if defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
# if !defined(HASH_BLOCK_DATA_ORDER_ALIGNED) && HASH_LONG_LOG2==2
|
|
# define HASH_BLOCK_DATA_ORDER_ALIGNED HASH_BLOCK_HOST_ORDER
|
|
# endif
|
|
# elif defined(DATA_ORDER_IS_BIG_ENDIAN)
|
|
# ifndef HOST_FETCH32
|
|
# ifdef BE_FETCH32
|
|
# define HOST_FETCH32(p,l) BE_FETCH32(p)
|
|
# elif defined(REVERSE_FETCH32)
|
|
# define HOST_FETCH32(p,l) REVERSE_FETCH32(p,l)
|
|
# endif
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
#if !defined(HASH_BLOCK_DATA_ORDER_ALIGNED)
|
|
#ifndef HASH_BLOCK_DATA_ORDER
|
|
#error "HASH_BLOCK_DATA_ORDER must be defined!"
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
|
|
|
|
#define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
|
|
l|=(((unsigned long)(*((c)++)))<<16), \
|
|
l|=(((unsigned long)(*((c)++)))<< 8), \
|
|
l|=(((unsigned long)(*((c)++))) ), \
|
|
l)
|
|
#define HOST_p_c2l(c,l,n) { \
|
|
switch (n) { \
|
|
case 0: l =((unsigned long)(*((c)++)))<<24; \
|
|
case 1: l|=((unsigned long)(*((c)++)))<<16; \
|
|
case 2: l|=((unsigned long)(*((c)++)))<< 8; \
|
|
case 3: l|=((unsigned long)(*((c)++))); \
|
|
} }
|
|
#define HOST_p_c2l_p(c,l,sc,len) { \
|
|
switch (sc) { \
|
|
case 0: l =((unsigned long)(*((c)++)))<<24; \
|
|
if (--len == 0) break; \
|
|
case 1: l|=((unsigned long)(*((c)++)))<<16; \
|
|
if (--len == 0) break; \
|
|
case 2: l|=((unsigned long)(*((c)++)))<< 8; \
|
|
} }
|
|
/* NOTE the pointer is not incremented at the end of this */
|
|
#define HOST_c2l_p(c,l,n) { \
|
|
l=0; (c)+=n; \
|
|
switch (n) { \
|
|
case 3: l =((unsigned long)(*(--(c))))<< 8; \
|
|
case 2: l|=((unsigned long)(*(--(c))))<<16; \
|
|
case 1: l|=((unsigned long)(*(--(c))))<<24; \
|
|
} }
|
|
#define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
|
|
*((c)++)=(unsigned char)(((l) )&0xff), \
|
|
l)
|
|
|
|
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
|
|
#define HOST_c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
|
|
l|=(((unsigned long)(*((c)++)))<< 8), \
|
|
l|=(((unsigned long)(*((c)++)))<<16), \
|
|
l|=(((unsigned long)(*((c)++)))<<24), \
|
|
l)
|
|
#define HOST_p_c2l(c,l,n) { \
|
|
switch (n) { \
|
|
case 0: l =((unsigned long)(*((c)++))); \
|
|
case 1: l|=((unsigned long)(*((c)++)))<< 8; \
|
|
case 2: l|=((unsigned long)(*((c)++)))<<16; \
|
|
case 3: l|=((unsigned long)(*((c)++)))<<24; \
|
|
} }
|
|
#define HOST_p_c2l_p(c,l,sc,len) { \
|
|
switch (sc) { \
|
|
case 0: l =((unsigned long)(*((c)++))); \
|
|
if (--len == 0) break; \
|
|
case 1: l|=((unsigned long)(*((c)++)))<< 8; \
|
|
if (--len == 0) break; \
|
|
case 2: l|=((unsigned long)(*((c)++)))<<16; \
|
|
} }
|
|
/* NOTE the pointer is not incremented at the end of this */
|
|
#define HOST_c2l_p(c,l,n) { \
|
|
l=0; (c)+=n; \
|
|
switch (n) { \
|
|
case 3: l =((unsigned long)(*(--(c))))<<16; \
|
|
case 2: l|=((unsigned long)(*(--(c))))<< 8; \
|
|
case 1: l|=((unsigned long)(*(--(c)))); \
|
|
} }
|
|
#define HOST_l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>>16)&0xff), \
|
|
*((c)++)=(unsigned char)(((l)>>24)&0xff), \
|
|
l)
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Time for some action:-)
|
|
*/
|
|
|
|
int HASH_UPDATE (HASH_CTX *c, const void *data_, unsigned long len)
|
|
{
|
|
const unsigned char *data=data_;
|
|
register HASH_LONG * p;
|
|
register unsigned long l;
|
|
int sw,sc,ew,ec;
|
|
|
|
if (len==0) return 1;
|
|
|
|
l=(c->Nl+(len<<3))&0xffffffffL;
|
|
/* 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+=(len>>29);
|
|
c->Nl=l;
|
|
|
|
if (c->num != 0)
|
|
{
|
|
p=c->data;
|
|
sw=c->num>>2;
|
|
sc=c->num&0x03;
|
|
|
|
if ((c->num+len) >= HASH_CBLOCK)
|
|
{
|
|
l=p[sw]; HOST_p_c2l(data,l,sc); p[sw++]=l;
|
|
for (; sw<HASH_LBLOCK; sw++)
|
|
{
|
|
HOST_c2l(data,l); p[sw]=l;
|
|
}
|
|
HASH_BLOCK_HOST_ORDER (c,p,1);
|
|
len-=(HASH_CBLOCK-c->num);
|
|
c->num=0;
|
|
/* drop through and do the rest */
|
|
}
|
|
else
|
|
{
|
|
c->num+=len;
|
|
if ((sc+len) < 4) /* ugly, add char's to a word */
|
|
{
|
|
l=p[sw]; HOST_p_c2l_p(data,l,sc,len); p[sw]=l;
|
|
}
|
|
else
|
|
{
|
|
ew=(c->num>>2);
|
|
ec=(c->num&0x03);
|
|
l=p[sw]; HOST_p_c2l(data,l,sc); p[sw++]=l;
|
|
for (; sw < ew; sw++)
|
|
{
|
|
HOST_c2l(data,l); p[sw]=l;
|
|
}
|
|
if (ec)
|
|
{
|
|
HOST_c2l_p(data,l,ec); p[sw]=l;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
sw=len/HASH_CBLOCK;
|
|
if (sw > 0)
|
|
{
|
|
#if defined(HASH_BLOCK_DATA_ORDER_ALIGNED)
|
|
/*
|
|
* Note that HASH_BLOCK_DATA_ORDER_ALIGNED gets defined
|
|
* only if sizeof(HASH_LONG)==4.
|
|
*/
|
|
if ((((unsigned long)data)%4) == 0)
|
|
{
|
|
/* data is properly aligned so that we can cast it: */
|
|
HASH_BLOCK_DATA_ORDER_ALIGNED (c,(HASH_LONG *)data,sw);
|
|
sw*=HASH_CBLOCK;
|
|
data+=sw;
|
|
len-=sw;
|
|
}
|
|
else
|
|
#if !defined(HASH_BLOCK_DATA_ORDER)
|
|
while (sw--)
|
|
{
|
|
memcpy (p=c->data,data,HASH_CBLOCK);
|
|
HASH_BLOCK_DATA_ORDER_ALIGNED(c,p,1);
|
|
data+=HASH_CBLOCK;
|
|
len-=HASH_CBLOCK;
|
|
}
|
|
#endif
|
|
#endif
|
|
#if defined(HASH_BLOCK_DATA_ORDER)
|
|
{
|
|
HASH_BLOCK_DATA_ORDER(c,data,sw);
|
|
sw*=HASH_CBLOCK;
|
|
data+=sw;
|
|
len-=sw;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (len!=0)
|
|
{
|
|
p = c->data;
|
|
c->num = len;
|
|
ew=len>>2; /* words to copy */
|
|
ec=len&0x03;
|
|
for (; ew; ew--,p++)
|
|
{
|
|
HOST_c2l(data,l); *p=l;
|
|
}
|
|
HOST_c2l_p(data,l,ec);
|
|
*p=l;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
void HASH_TRANSFORM (HASH_CTX *c, const unsigned char *data)
|
|
{
|
|
#if defined(HASH_BLOCK_DATA_ORDER_ALIGNED)
|
|
if ((((unsigned long)data)%4) == 0)
|
|
/* data is properly aligned so that we can cast it: */
|
|
HASH_BLOCK_DATA_ORDER_ALIGNED (c,(HASH_LONG *)data,1);
|
|
else
|
|
#if !defined(HASH_BLOCK_DATA_ORDER)
|
|
{
|
|
memcpy (c->data,data,HASH_CBLOCK);
|
|
HASH_BLOCK_DATA_ORDER_ALIGNED (c,c->data,1);
|
|
}
|
|
#endif
|
|
#endif
|
|
#if defined(HASH_BLOCK_DATA_ORDER)
|
|
HASH_BLOCK_DATA_ORDER (c,data,1);
|
|
#endif
|
|
}
|
|
|
|
|
|
int HASH_FINAL (unsigned char *md, HASH_CTX *c)
|
|
{
|
|
register HASH_LONG *p;
|
|
register unsigned long l;
|
|
register int i,j;
|
|
static const unsigned char end[4]={0x80,0x00,0x00,0x00};
|
|
const unsigned char *cp=end;
|
|
|
|
/* c->num should definitly have room for at least one more byte. */
|
|
p=c->data;
|
|
i=c->num>>2;
|
|
j=c->num&0x03;
|
|
|
|
#if 0
|
|
/* purify often complains about the following line as an
|
|
* Uninitialized Memory Read. While this can be true, the
|
|
* following p_c2l macro will reset l when that case is true.
|
|
* This is because j&0x03 contains the number of 'valid' bytes
|
|
* already in p[i]. If and only if j&0x03 == 0, the UMR will
|
|
* occur but this is also the only time p_c2l will do
|
|
* l= *(cp++) instead of l|= *(cp++)
|
|
* Many thanks to Alex Tang <altitude@cic.net> for pickup this
|
|
* 'potential bug' */
|
|
#ifdef PURIFY
|
|
if (j==0) p[i]=0; /* Yeah, but that's not the way to fix it:-) */
|
|
#endif
|
|
l=p[i];
|
|
#else
|
|
l = (j==0) ? 0 : p[i];
|
|
#endif
|
|
HOST_p_c2l(cp,l,j); p[i++]=l; /* i is the next 'undefined word' */
|
|
|
|
if (i>(HASH_LBLOCK-2)) /* save room for Nl and Nh */
|
|
{
|
|
if (i<HASH_LBLOCK) p[i]=0;
|
|
HASH_BLOCK_HOST_ORDER (c,p,1);
|
|
i=0;
|
|
}
|
|
for (; i<(HASH_LBLOCK-2); i++)
|
|
p[i]=0;
|
|
|
|
#if defined(DATA_ORDER_IS_BIG_ENDIAN)
|
|
p[HASH_LBLOCK-2]=c->Nh;
|
|
p[HASH_LBLOCK-1]=c->Nl;
|
|
#elif defined(DATA_ORDER_IS_LITTLE_ENDIAN)
|
|
p[HASH_LBLOCK-2]=c->Nl;
|
|
p[HASH_LBLOCK-1]=c->Nh;
|
|
#endif
|
|
HASH_BLOCK_HOST_ORDER (c,p,1);
|
|
|
|
#ifndef HASH_MAKE_STRING
|
|
#error "HASH_MAKE_STRING must be defined!"
|
|
#else
|
|
HASH_MAKE_STRING(c,md);
|
|
#endif
|
|
|
|
c->num=0;
|
|
/* clear stuff, HASH_BLOCK may be leaving some stuff on the stack
|
|
* but I'm not worried :-)
|
|
memset((void *)c,0,sizeof(HASH_CTX));
|
|
*/
|
|
return 1;
|
|
}
|