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244 lines
8.2 KiB
C
244 lines
8.2 KiB
C
/* crypto/sha/sha_locl.h */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#ifdef undef
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/* one or the other needs to be defined */
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#ifndef SHA_1 /* FIPE 180-1 */
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#define SHA_0 /* FIPS 180 */
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#endif
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#endif
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#define ULONG unsigned long
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#define UCHAR unsigned char
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#define UINT unsigned int
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#ifdef NOCONST
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#define const
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#endif
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#undef c2nl
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#define c2nl(c,l) (l =(((unsigned long)(*((c)++)))<<24), \
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l|=(((unsigned long)(*((c)++)))<<16), \
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l|=(((unsigned long)(*((c)++)))<< 8), \
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l|=(((unsigned long)(*((c)++))) ))
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#undef p_c2nl
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#define p_c2nl(c,l,n) { \
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switch (n) { \
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case 0: l =((unsigned long)(*((c)++)))<<24; \
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case 1: l|=((unsigned long)(*((c)++)))<<16; \
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case 2: l|=((unsigned long)(*((c)++)))<< 8; \
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case 3: l|=((unsigned long)(*((c)++))); \
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} \
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}
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#undef c2nl_p
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/* NOTE the pointer is not incremented at the end of this */
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#define c2nl_p(c,l,n) { \
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l=0; \
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(c)+=n; \
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switch (n) { \
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case 3: l =((unsigned long)(*(--(c))))<< 8; \
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case 2: l|=((unsigned long)(*(--(c))))<<16; \
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case 1: l|=((unsigned long)(*(--(c))))<<24; \
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} \
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}
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#undef p_c2nl_p
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#define p_c2nl_p(c,l,sc,len) { \
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switch (sc) \
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{ \
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case 0: l =((unsigned long)(*((c)++)))<<24; \
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if (--len == 0) break; \
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case 1: l|=((unsigned long)(*((c)++)))<<16; \
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if (--len == 0) break; \
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case 2: l|=((unsigned long)(*((c)++)))<< 8; \
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} \
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}
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#undef nl2c
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#define nl2c(l,c) (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
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*((c)++)=(unsigned char)(((l)>>16)&0xff), \
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*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
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*((c)++)=(unsigned char)(((l) )&0xff))
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#undef c2l
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#define c2l(c,l) (l =(((unsigned long)(*((c)++))) ), \
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l|=(((unsigned long)(*((c)++)))<< 8), \
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l|=(((unsigned long)(*((c)++)))<<16), \
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l|=(((unsigned long)(*((c)++)))<<24))
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#undef p_c2l
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#define p_c2l(c,l,n) { \
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switch (n) { \
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case 0: l =((unsigned long)(*((c)++))); \
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case 1: l|=((unsigned long)(*((c)++)))<< 8; \
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case 2: l|=((unsigned long)(*((c)++)))<<16; \
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case 3: l|=((unsigned long)(*((c)++)))<<24; \
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} \
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}
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#undef c2l_p
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/* NOTE the pointer is not incremented at the end of this */
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#define c2l_p(c,l,n) { \
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l=0; \
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(c)+=n; \
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switch (n) { \
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case 3: l =((unsigned long)(*(--(c))))<<16; \
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case 2: l|=((unsigned long)(*(--(c))))<< 8; \
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case 1: l|=((unsigned long)(*(--(c)))); \
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} \
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}
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#undef p_c2l_p
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#define p_c2l_p(c,l,sc,len) { \
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switch (sc) \
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{ \
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case 0: l =((unsigned long)(*((c)++))); \
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if (--len == 0) break; \
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case 1: l|=((unsigned long)(*((c)++)))<< 8; \
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if (--len == 0) break; \
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case 2: l|=((unsigned long)(*((c)++)))<<16; \
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} \
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}
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#undef l2c
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#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
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*((c)++)=(unsigned char)(((l)>> 8)&0xff), \
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*((c)++)=(unsigned char)(((l)>>16)&0xff), \
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*((c)++)=(unsigned char)(((l)>>24)&0xff))
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#undef ROTATE
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#if defined(WIN32)
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#define ROTATE(a,n) _lrotl(a,n)
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#else
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#define ROTATE(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
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#endif
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/* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */
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#if defined(WIN32)
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/* 5 instructions with rotate instruction, else 9 */
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#define Endian_Reverse32(a) \
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{ \
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unsigned long l=(a); \
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(a)=((ROTATE(l,8)&0x00FF00FF)|(ROTATE(l,24)&0xFF00FF00)); \
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}
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#else
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/* 6 instructions with rotate instruction, else 8 */
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#define Endian_Reverse32(a) \
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{ \
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unsigned long l=(a); \
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l=(((l&0xFF00FF00)>>8L)|((l&0x00FF00FF)<<8L)); \
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(a)=ROTATE(l,16L); \
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}
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#endif
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/* As pointed out by Wei Dai <weidai@eskimo.com>, F() below can be
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* simplified to the code in F_00_19. Wei attributes these optimisations
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* to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
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* #define F(x,y,z) (((x) & (y)) | ((~(x)) & (z)))
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* I've just become aware of another tweak to be made, again from Wei Dai,
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* in F_40_59, (x&a)|(y&a) -> (x|y)&a
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*/
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#define F_00_19(b,c,d) ((((c) ^ (d)) & (b)) ^ (d))
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#define F_20_39(b,c,d) ((b) ^ (c) ^ (d))
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#define F_40_59(b,c,d) (((b) & (c)) | (((b)|(c)) & (d)))
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#define F_60_79(b,c,d) F_20_39(b,c,d)
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#ifdef SHA_0
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#undef Xupdate
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#define Xupdate(a,i,ia,ib,ic,id) X[(i)&0x0f]=(a)=\
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(ia[(i)&0x0f]^ib[((i)+2)&0x0f]^ic[((i)+8)&0x0f]^id[((i)+13)&0x0f]);
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#endif
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#ifdef SHA_1
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#undef Xupdate
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#define Xupdate(a,i,ia,ib,ic,id) (a)=\
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(ia[(i)&0x0f]^ib[((i)+2)&0x0f]^ic[((i)+8)&0x0f]^id[((i)+13)&0x0f]);\
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X[(i)&0x0f]=(a)=ROTATE((a),1);
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#endif
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#define BODY_00_15(i,a,b,c,d,e,f,xa) \
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(f)=xa[i]+(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
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(b)=ROTATE((b),30);
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#define BODY_16_19(i,a,b,c,d,e,f,xa,xb,xc,xd) \
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Xupdate(f,i,xa,xb,xc,xd); \
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(f)+=(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
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(b)=ROTATE((b),30);
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#define BODY_20_31(i,a,b,c,d,e,f,xa,xb,xc,xd) \
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Xupdate(f,i,xa,xb,xc,xd); \
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(f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
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(b)=ROTATE((b),30);
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#define BODY_32_39(i,a,b,c,d,e,f,xa) \
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Xupdate(f,i,xa,xa,xa,xa); \
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(f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
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(b)=ROTATE((b),30);
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#define BODY_40_59(i,a,b,c,d,e,f,xa) \
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Xupdate(f,i,xa,xa,xa,xa); \
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(f)+=(e)+K_40_59+ROTATE((a),5)+F_40_59((b),(c),(d)); \
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(b)=ROTATE((b),30);
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#define BODY_60_79(i,a,b,c,d,e,f,xa) \
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Xupdate(f,i,xa,xa,xa,xa); \
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(f)=X[(i)&0x0f]+(e)+K_60_79+ROTATE((a),5)+F_60_79((b),(c),(d)); \
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(b)=ROTATE((b),30);
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