/* crypto/sha/sha_locl.h */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the routines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#ifdef undef
/* one or the other needs to be defined */
#ifndef SHA_1 /* FIPE 180-1 */
#define SHA_0 /* FIPS 180   */
#endif
#endif

#define ULONG   unsigned long
#define UCHAR   unsigned char
#define UINT    unsigned int

#ifdef NOCONST
#define const
#endif

#undef c2nl
#define c2nl(c,l)       (l =(((unsigned long)(*((c)++)))<<24), \
                         l|=(((unsigned long)(*((c)++)))<<16), \
                         l|=(((unsigned long)(*((c)++)))<< 8), \
                         l|=(((unsigned long)(*((c)++)))    ))

#undef p_c2nl
#define p_c2nl(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)++))); \
                                } \
                        }

#undef c2nl_p
/* NOTE the pointer is not incremented at the end of this */
#define c2nl_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; \
                                } \
                        }

#undef p_c2nl_p
#define p_c2nl_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; \
                                } \
                        }

#undef nl2c
#define nl2c(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))

#undef c2l
#define c2l(c,l)        (l =(((unsigned long)(*((c)++)))    ), \
                         l|=(((unsigned long)(*((c)++)))<< 8), \
                         l|=(((unsigned long)(*((c)++)))<<16), \
                         l|=(((unsigned long)(*((c)++)))<<24))

#undef p_c2l
#define 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; \
                                } \
                        }

#undef c2l_p
/* NOTE the pointer is not incremented at the end of this */
#define 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)))); \
                                } \
                        }

#undef p_c2l_p
#define 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; \
                                } \
                        }

#undef l2c
#define 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))

#undef ROTATE
#if defined(WIN32)
#define ROTATE(a,n)     _lrotl(a,n)
#else
#define ROTATE(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
#endif

/* A nice byte order reversal from Wei Dai <weidai@eskimo.com> */
#if defined(WIN32)
/* 5 instructions with rotate instruction, else 9 */
#define Endian_Reverse32(a) \
        { \
        unsigned long l=(a); \
        (a)=((ROTATE(l,8)&0x00FF00FF)|(ROTATE(l,24)&0xFF00FF00)); \
        }
#else
/* 6 instructions with rotate instruction, else 8 */
#define Endian_Reverse32(a) \
        { \
        unsigned long l=(a); \
        l=(((l&0xFF00FF00)>>8L)|((l&0x00FF00FF)<<8L)); \
        (a)=ROTATE(l,16L); \
        }
#endif

/* As  pointed out by Wei Dai <weidai@eskimo.com>, F() below can be
 * simplified to the code in F_00_19.  Wei attributes these optimisations
 * to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
 * #define F(x,y,z) (((x) & (y))  |  ((~(x)) & (z)))
 * I've just become aware of another tweak to be made, again from Wei Dai,
 * in F_40_59, (x&a)|(y&a) -> (x|y)&a
 */
#define F_00_19(b,c,d)  ((((c) ^ (d)) & (b)) ^ (d)) 
#define F_20_39(b,c,d)  ((b) ^ (c) ^ (d))
#define F_40_59(b,c,d)  (((b) & (c)) | (((b)|(c)) & (d))) 
#define F_60_79(b,c,d)  F_20_39(b,c,d)

#ifdef SHA_0
#undef Xupdate
#define Xupdate(a,i,ia,ib,ic,id) X[(i)&0x0f]=(a)=\
        (ia[(i)&0x0f]^ib[((i)+2)&0x0f]^ic[((i)+8)&0x0f]^id[((i)+13)&0x0f]);
#endif
#ifdef SHA_1
#undef Xupdate
#define Xupdate(a,i,ia,ib,ic,id) (a)=\
        (ia[(i)&0x0f]^ib[((i)+2)&0x0f]^ic[((i)+8)&0x0f]^id[((i)+13)&0x0f]);\
        X[(i)&0x0f]=(a)=ROTATE((a),1);
#endif

#define BODY_00_15(i,a,b,c,d,e,f,xa) \
        (f)=xa[i]+(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
        (b)=ROTATE((b),30);

#define BODY_16_19(i,a,b,c,d,e,f,xa,xb,xc,xd) \
        Xupdate(f,i,xa,xb,xc,xd); \
        (f)+=(e)+K_00_19+ROTATE((a),5)+F_00_19((b),(c),(d)); \
        (b)=ROTATE((b),30);

#define BODY_20_31(i,a,b,c,d,e,f,xa,xb,xc,xd) \
        Xupdate(f,i,xa,xb,xc,xd); \
        (f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
        (b)=ROTATE((b),30);

#define BODY_32_39(i,a,b,c,d,e,f,xa) \
        Xupdate(f,i,xa,xa,xa,xa); \
        (f)+=(e)+K_20_39+ROTATE((a),5)+F_20_39((b),(c),(d)); \
        (b)=ROTATE((b),30);

#define BODY_40_59(i,a,b,c,d,e,f,xa) \
        Xupdate(f,i,xa,xa,xa,xa); \
        (f)+=(e)+K_40_59+ROTATE((a),5)+F_40_59((b),(c),(d)); \
        (b)=ROTATE((b),30);

#define BODY_60_79(i,a,b,c,d,e,f,xa) \
        Xupdate(f,i,xa,xa,xa,xa); \
        (f)=X[(i)&0x0f]+(e)+K_60_79+ROTATE((a),5)+F_60_79((b),(c),(d)); \
        (b)=ROTATE((b),30);