/* $OpenBSD: sha_locl.h,v 1.24 2021/11/09 18:40:21 bcook Exp $ */
/* 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 rouines 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.]
 */

#include <stdlib.h>
#include <string.h>

#include <openssl/opensslconf.h>
#include <openssl/sha.h>

#define DATA_ORDER_IS_BIG_ENDIAN

#define HASH_LONG               SHA_LONG
#define HASH_CTX                SHA_CTX
#define HASH_CBLOCK             SHA_CBLOCK
#define HASH_MAKE_STRING(c,s)   do {    \
        unsigned long ll;               \
        ll=(c)->h0; HOST_l2c(ll,(s));   \
        ll=(c)->h1; HOST_l2c(ll,(s));   \
        ll=(c)->h2; HOST_l2c(ll,(s));   \
        ll=(c)->h3; HOST_l2c(ll,(s));   \
        ll=(c)->h4; HOST_l2c(ll,(s));   \
        } while (0)

# define HASH_UPDATE                    SHA1_Update
# define HASH_TRANSFORM                 SHA1_Transform
# define HASH_FINAL                     SHA1_Final
# define HASH_INIT                      SHA1_Init
# define HASH_BLOCK_DATA_ORDER          sha1_block_data_order
# define Xupdate(a,ix,ia,ib,ic,id)      ( (a)=(ia^ib^ic^id),    \
                                          ix=(a)=ROTATE((a),1)  \
                                        )

__BEGIN_HIDDEN_DECLS

#ifndef SHA1_ASM
static
#endif

void sha1_block_data_order (SHA_CTX *c, const void *p,size_t num);

__END_HIDDEN_DECLS

#include "md32_common.h"

#define INIT_DATA_h0 0x67452301UL
#define INIT_DATA_h1 0xefcdab89UL
#define INIT_DATA_h2 0x98badcfeUL
#define INIT_DATA_h3 0x10325476UL
#define INIT_DATA_h4 0xc3d2e1f0UL

int SHA1_Init(SHA_CTX *c)
        {
        memset (c,0,sizeof(*c));
        c->h0=INIT_DATA_h0;
        c->h1=INIT_DATA_h1;
        c->h2=INIT_DATA_h2;
        c->h3=INIT_DATA_h3;
        c->h4=INIT_DATA_h4;
        return 1;
        }

#define K_00_19 0x5a827999UL
#define K_20_39 0x6ed9eba1UL
#define K_40_59 0x8f1bbcdcUL
#define K_60_79 0xca62c1d6UL

/* 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)

#ifndef OPENSSL_SMALL_FOOTPRINT

#define BODY_00_15(i,a,b,c,d,e,f,xi) \
        (f)=xi+(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,xi,xa,xb,xc,xd) \
        Xupdate(f,xi,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,xi,xa,xb,xc,xd) \
        Xupdate(f,xi,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,xb,xc,xd) \
        Xupdate(f,xa,xa,xb,xc,xd); \
        (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,xb,xc,xd) \
        Xupdate(f,xa,xa,xb,xc,xd); \
        (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,xb,xc,xd) \
        Xupdate(f,xa,xa,xb,xc,xd); \
        (f)=xa+(e)+K_60_79+ROTATE((a),5)+F_60_79((b),(c),(d)); \
        (b)=ROTATE((b),30);

#ifdef X
#undef X
#endif
#ifndef MD32_XARRAY
  /*
   * Originally X was an array. As it's automatic it's natural
   * to expect RISC compiler to accommodate at least part of it in
   * the register bank, isn't it? Unfortunately not all compilers
   * "find" this expectation reasonable:-( On order to make such
   * compilers generate better code I replace X[] with a bunch of
   * X0, X1, etc. See the function body below...
   *                                    <appro@fy.chalmers.se>
   */
# define X(i)   XX##i
#else
  /*
   * However! Some compilers (most notably HP C) get overwhelmed by
   * that many local variables so that we have to have the way to
   * fall down to the original behavior.
   */
# define X(i)   XX[i]
#endif

#if !defined(SHA1_ASM)
#include <endian.h>
static void HASH_BLOCK_DATA_ORDER (SHA_CTX *c, const void *p, size_t num)
        {
        const unsigned char *data=p;
        unsigned MD32_REG_T A,B,C,D,E,T,l;
#ifndef MD32_XARRAY
        unsigned MD32_REG_T     XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7,
                                XX8, XX9,XX10,XX11,XX12,XX13,XX14,XX15;
#else
        SHA_LONG        XX[16];
#endif

        A=c->h0;
        B=c->h1;
        C=c->h2;
        D=c->h3;
        E=c->h4;

        for (;;)
                        {

        if (BYTE_ORDER != LITTLE_ENDIAN &&
            sizeof(SHA_LONG)==4 && ((size_t)p%4)==0)
                {
                const SHA_LONG *W=(const SHA_LONG *)data;

                X( 0) = W[0];                           X( 1) = W[ 1];
                BODY_00_15( 0,A,B,C,D,E,T,X( 0));       X( 2) = W[ 2];
                BODY_00_15( 1,T,A,B,C,D,E,X( 1));       X( 3) = W[ 3];
                BODY_00_15( 2,E,T,A,B,C,D,X( 2));       X( 4) = W[ 4];
                BODY_00_15( 3,D,E,T,A,B,C,X( 3));       X( 5) = W[ 5];
                BODY_00_15( 4,C,D,E,T,A,B,X( 4));       X( 6) = W[ 6];
                BODY_00_15( 5,B,C,D,E,T,A,X( 5));       X( 7) = W[ 7];
                BODY_00_15( 6,A,B,C,D,E,T,X( 6));       X( 8) = W[ 8];
                BODY_00_15( 7,T,A,B,C,D,E,X( 7));       X( 9) = W[ 9];
                BODY_00_15( 8,E,T,A,B,C,D,X( 8));       X(10) = W[10];
                BODY_00_15( 9,D,E,T,A,B,C,X( 9));       X(11) = W[11];
                BODY_00_15(10,C,D,E,T,A,B,X(10));       X(12) = W[12];
                BODY_00_15(11,B,C,D,E,T,A,X(11));       X(13) = W[13];
                BODY_00_15(12,A,B,C,D,E,T,X(12));       X(14) = W[14];
                BODY_00_15(13,T,A,B,C,D,E,X(13));       X(15) = W[15];
                BODY_00_15(14,E,T,A,B,C,D,X(14));
                BODY_00_15(15,D,E,T,A,B,C,X(15));

                data += SHA_CBLOCK;
                }
        else
                {
                HOST_c2l(data,l); X( 0)=l;              HOST_c2l(data,l); X( 1)=l;
                BODY_00_15( 0,A,B,C,D,E,T,X( 0));       HOST_c2l(data,l); X( 2)=l;
                BODY_00_15( 1,T,A,B,C,D,E,X( 1));       HOST_c2l(data,l); X( 3)=l;
                BODY_00_15( 2,E,T,A,B,C,D,X( 2));       HOST_c2l(data,l); X( 4)=l;
                BODY_00_15( 3,D,E,T,A,B,C,X( 3));       HOST_c2l(data,l); X( 5)=l;
                BODY_00_15( 4,C,D,E,T,A,B,X( 4));       HOST_c2l(data,l); X( 6)=l;
                BODY_00_15( 5,B,C,D,E,T,A,X( 5));       HOST_c2l(data,l); X( 7)=l;
                BODY_00_15( 6,A,B,C,D,E,T,X( 6));       HOST_c2l(data,l); X( 8)=l;
                BODY_00_15( 7,T,A,B,C,D,E,X( 7));       HOST_c2l(data,l); X( 9)=l;
                BODY_00_15( 8,E,T,A,B,C,D,X( 8));       HOST_c2l(data,l); X(10)=l;
                BODY_00_15( 9,D,E,T,A,B,C,X( 9));       HOST_c2l(data,l); X(11)=l;
                BODY_00_15(10,C,D,E,T,A,B,X(10));       HOST_c2l(data,l); X(12)=l;
                BODY_00_15(11,B,C,D,E,T,A,X(11));       HOST_c2l(data,l); X(13)=l;
                BODY_00_15(12,A,B,C,D,E,T,X(12));       HOST_c2l(data,l); X(14)=l;
                BODY_00_15(13,T,A,B,C,D,E,X(13));       HOST_c2l(data,l); X(15)=l;
                BODY_00_15(14,E,T,A,B,C,D,X(14));
                BODY_00_15(15,D,E,T,A,B,C,X(15));
                }

        BODY_16_19(16,C,D,E,T,A,B,X( 0),X( 0),X( 2),X( 8),X(13));
        BODY_16_19(17,B,C,D,E,T,A,X( 1),X( 1),X( 3),X( 9),X(14));
        BODY_16_19(18,A,B,C,D,E,T,X( 2),X( 2),X( 4),X(10),X(15));
        BODY_16_19(19,T,A,B,C,D,E,X( 3),X( 3),X( 5),X(11),X( 0));

        BODY_20_31(20,E,T,A,B,C,D,X( 4),X( 4),X( 6),X(12),X( 1));
        BODY_20_31(21,D,E,T,A,B,C,X( 5),X( 5),X( 7),X(13),X( 2));
        BODY_20_31(22,C,D,E,T,A,B,X( 6),X( 6),X( 8),X(14),X( 3));
        BODY_20_31(23,B,C,D,E,T,A,X( 7),X( 7),X( 9),X(15),X( 4));
        BODY_20_31(24,A,B,C,D,E,T,X( 8),X( 8),X(10),X( 0),X( 5));
        BODY_20_31(25,T,A,B,C,D,E,X( 9),X( 9),X(11),X( 1),X( 6));
        BODY_20_31(26,E,T,A,B,C,D,X(10),X(10),X(12),X( 2),X( 7));
        BODY_20_31(27,D,E,T,A,B,C,X(11),X(11),X(13),X( 3),X( 8));
        BODY_20_31(28,C,D,E,T,A,B,X(12),X(12),X(14),X( 4),X( 9));
        BODY_20_31(29,B,C,D,E,T,A,X(13),X(13),X(15),X( 5),X(10));
        BODY_20_31(30,A,B,C,D,E,T,X(14),X(14),X( 0),X( 6),X(11));
        BODY_20_31(31,T,A,B,C,D,E,X(15),X(15),X( 1),X( 7),X(12));

        BODY_32_39(32,E,T,A,B,C,D,X( 0),X( 2),X( 8),X(13));
        BODY_32_39(33,D,E,T,A,B,C,X( 1),X( 3),X( 9),X(14));
        BODY_32_39(34,C,D,E,T,A,B,X( 2),X( 4),X(10),X(15));
        BODY_32_39(35,B,C,D,E,T,A,X( 3),X( 5),X(11),X( 0));
        BODY_32_39(36,A,B,C,D,E,T,X( 4),X( 6),X(12),X( 1));
        BODY_32_39(37,T,A,B,C,D,E,X( 5),X( 7),X(13),X( 2));
        BODY_32_39(38,E,T,A,B,C,D,X( 6),X( 8),X(14),X( 3));
        BODY_32_39(39,D,E,T,A,B,C,X( 7),X( 9),X(15),X( 4));

        BODY_40_59(40,C,D,E,T,A,B,X( 8),X(10),X( 0),X( 5));
        BODY_40_59(41,B,C,D,E,T,A,X( 9),X(11),X( 1),X( 6));
        BODY_40_59(42,A,B,C,D,E,T,X(10),X(12),X( 2),X( 7));
        BODY_40_59(43,T,A,B,C,D,E,X(11),X(13),X( 3),X( 8));
        BODY_40_59(44,E,T,A,B,C,D,X(12),X(14),X( 4),X( 9));
        BODY_40_59(45,D,E,T,A,B,C,X(13),X(15),X( 5),X(10));
        BODY_40_59(46,C,D,E,T,A,B,X(14),X( 0),X( 6),X(11));
        BODY_40_59(47,B,C,D,E,T,A,X(15),X( 1),X( 7),X(12));
        BODY_40_59(48,A,B,C,D,E,T,X( 0),X( 2),X( 8),X(13));
        BODY_40_59(49,T,A,B,C,D,E,X( 1),X( 3),X( 9),X(14));
        BODY_40_59(50,E,T,A,B,C,D,X( 2),X( 4),X(10),X(15));
        BODY_40_59(51,D,E,T,A,B,C,X( 3),X( 5),X(11),X( 0));
        BODY_40_59(52,C,D,E,T,A,B,X( 4),X( 6),X(12),X( 1));
        BODY_40_59(53,B,C,D,E,T,A,X( 5),X( 7),X(13),X( 2));
        BODY_40_59(54,A,B,C,D,E,T,X( 6),X( 8),X(14),X( 3));
        BODY_40_59(55,T,A,B,C,D,E,X( 7),X( 9),X(15),X( 4));
        BODY_40_59(56,E,T,A,B,C,D,X( 8),X(10),X( 0),X( 5));
        BODY_40_59(57,D,E,T,A,B,C,X( 9),X(11),X( 1),X( 6));
        BODY_40_59(58,C,D,E,T,A,B,X(10),X(12),X( 2),X( 7));
        BODY_40_59(59,B,C,D,E,T,A,X(11),X(13),X( 3),X( 8));

        BODY_60_79(60,A,B,C,D,E,T,X(12),X(14),X( 4),X( 9));
        BODY_60_79(61,T,A,B,C,D,E,X(13),X(15),X( 5),X(10));
        BODY_60_79(62,E,T,A,B,C,D,X(14),X( 0),X( 6),X(11));
        BODY_60_79(63,D,E,T,A,B,C,X(15),X( 1),X( 7),X(12));
        BODY_60_79(64,C,D,E,T,A,B,X( 0),X( 2),X( 8),X(13));
        BODY_60_79(65,B,C,D,E,T,A,X( 1),X( 3),X( 9),X(14));
        BODY_60_79(66,A,B,C,D,E,T,X( 2),X( 4),X(10),X(15));
        BODY_60_79(67,T,A,B,C,D,E,X( 3),X( 5),X(11),X( 0));
        BODY_60_79(68,E,T,A,B,C,D,X( 4),X( 6),X(12),X( 1));
        BODY_60_79(69,D,E,T,A,B,C,X( 5),X( 7),X(13),X( 2));
        BODY_60_79(70,C,D,E,T,A,B,X( 6),X( 8),X(14),X( 3));
        BODY_60_79(71,B,C,D,E,T,A,X( 7),X( 9),X(15),X( 4));
        BODY_60_79(72,A,B,C,D,E,T,X( 8),X(10),X( 0),X( 5));
        BODY_60_79(73,T,A,B,C,D,E,X( 9),X(11),X( 1),X( 6));
        BODY_60_79(74,E,T,A,B,C,D,X(10),X(12),X( 2),X( 7));
        BODY_60_79(75,D,E,T,A,B,C,X(11),X(13),X( 3),X( 8));
        BODY_60_79(76,C,D,E,T,A,B,X(12),X(14),X( 4),X( 9));
        BODY_60_79(77,B,C,D,E,T,A,X(13),X(15),X( 5),X(10));
        BODY_60_79(78,A,B,C,D,E,T,X(14),X( 0),X( 6),X(11));
        BODY_60_79(79,T,A,B,C,D,E,X(15),X( 1),X( 7),X(12));
        
        c->h0=(c->h0+E)&0xffffffffL; 
        c->h1=(c->h1+T)&0xffffffffL;
        c->h2=(c->h2+A)&0xffffffffL;
        c->h3=(c->h3+B)&0xffffffffL;
        c->h4=(c->h4+C)&0xffffffffL;

        if (--num == 0) break;

        A=c->h0;
        B=c->h1;
        C=c->h2;
        D=c->h3;
        E=c->h4;

                        }
        }
#endif

#else   /* OPENSSL_SMALL_FOOTPRINT */

#define BODY_00_15(xi)           do {   \
        T=E+K_00_19+F_00_19(B,C,D);     \
        E=D, D=C, C=ROTATE(B,30), B=A;  \
        A=ROTATE(A,5)+T+xi;         } while(0)

#define BODY_16_19(xa,xb,xc,xd)  do {   \
        Xupdate(T,xa,xa,xb,xc,xd);      \
        T+=E+K_00_19+F_00_19(B,C,D);    \
        E=D, D=C, C=ROTATE(B,30), B=A;  \
        A=ROTATE(A,5)+T;            } while(0)

#define BODY_20_39(xa,xb,xc,xd)  do {   \
        Xupdate(T,xa,xa,xb,xc,xd);      \
        T+=E+K_20_39+F_20_39(B,C,D);    \
        E=D, D=C, C=ROTATE(B,30), B=A;  \
        A=ROTATE(A,5)+T;            } while(0)

#define BODY_40_59(xa,xb,xc,xd)  do {   \
        Xupdate(T,xa,xa,xb,xc,xd);      \
        T+=E+K_40_59+F_40_59(B,C,D);    \
        E=D, D=C, C=ROTATE(B,30), B=A;  \
        A=ROTATE(A,5)+T;            } while(0)

#define BODY_60_79(xa,xb,xc,xd)  do {   \
        Xupdate(T,xa,xa,xb,xc,xd);      \
        T=E+K_60_79+F_60_79(B,C,D);     \
        E=D, D=C, C=ROTATE(B,30), B=A;  \
        A=ROTATE(A,5)+T+xa;         } while(0)

#if !defined(SHA1_ASM)
static void HASH_BLOCK_DATA_ORDER (SHA_CTX *c, const void *p, size_t num)
        {
        const unsigned char *data=p;
        unsigned MD32_REG_T A,B,C,D,E,T,l;
        int i;
        SHA_LONG        X[16];

        A=c->h0;
        B=c->h1;
        C=c->h2;
        D=c->h3;
        E=c->h4;

        for (;;)
                {
        for (i=0;i<16;i++)
        { HOST_c2l(data,l); X[i]=l; BODY_00_15(X[i]); }
        for (i=0;i<4;i++)
        { BODY_16_19(X[i],       X[i+2],      X[i+8],     X[(i+13)&15]); }
        for (;i<24;i++)
        { BODY_20_39(X[i&15],    X[(i+2)&15], X[(i+8)&15],X[(i+13)&15]); }
        for (i=0;i<20;i++)
        { BODY_40_59(X[(i+8)&15],X[(i+10)&15],X[i&15],    X[(i+5)&15]);  }
        for (i=4;i<24;i++)
        { BODY_60_79(X[(i+8)&15],X[(i+10)&15],X[i&15],    X[(i+5)&15]);  }

        c->h0=(c->h0+A)&0xffffffffL; 
        c->h1=(c->h1+B)&0xffffffffL;
        c->h2=(c->h2+C)&0xffffffffL;
        c->h3=(c->h3+D)&0xffffffffL;
        c->h4=(c->h4+E)&0xffffffffL;

        if (--num == 0) break;

        A=c->h0;
        B=c->h1;
        C=c->h2;
        D=c->h3;
        E=c->h4;

                }
        }
#endif

#endif