Subversion Repositories or1k

/* crypto/sha/sha1dgst.c */

/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au)

 * All rights reserved.

 *

 * This package is an SSL implementation written

 * by Eric Young (eay@mincom.oz.au).

 * The implementation was written so as to conform with Netscapes SSL.

 *

 * Added Microsoft's Get_Key() per mppe draft by mag <mag@bunuel.tii.matav.hu>

 *

 * 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@mincom.oz.au).

 *

 * 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@mincom.oz.au)"

 *    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@mincom.oz.au)"

 *

 * 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.]

 */

#undef  SHA_0

#define SHA_1

#include "sha.h"

#include "sha_locl.h"

char *SHA1_version="SHA1 part of SSLeay 0.6.6 14-Jan-1997";

/* Implemented from SHA-1 document - The Secure Hash Algorithm

 */

#define INIT_DATA_h0 (unsigned long)0x67452301L

#define INIT_DATA_h1 (unsigned long)0xefcdab89L

#define INIT_DATA_h2 (unsigned long)0x98badcfeL

#define INIT_DATA_h3 (unsigned long)0x10325476L

#define INIT_DATA_h4 (unsigned long)0xc3d2e1f0L

#define K_00_19 0x5a827999L

#define K_20_39 0x6ed9eba1L

#define K_40_59 0x8f1bbcdcL

#define K_60_79 0xca62c1d6L

#ifndef NOPROTO

static void sha1_block(SHA_CTX *c, register unsigned long *p);

#else

static void sha1_block();

#endif

void SHA1_Init(c)

SHA_CTX *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;

        c->Nl=0;

        c->Nh=0;

        c->num=0;

        }

void SHA1_Update(c, data, len)

SHA_CTX *c;

register unsigned char *data;

unsigned long len;

        {

        register ULONG *p;

        int ew,ec,sw,sc;

        ULONG l;

        if (len == 0) return;

        l=(c->Nl+(len<<3))&0xffffffff;

        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) >= SHA_CBLOCK)

                        {

                        l= p[sw];

                        p_c2nl(data,l,sc);

                        p[sw++]=l;

                        for (; sw<SHA_LBLOCK; sw++)

                                {

                                c2nl(data,l);

                                p[sw]=l;

                                }

                        len-=(SHA_CBLOCK-c->num);

                        sha1_block(c,p);

                        c->num=0;

                        /* drop through and do the rest */

                        }

                else

                        {

                        int ew,ec;

                        c->num+=(int)len;

                        if ((sc+len) < 4) /* ugly, add char's to a word */

                                {

                                l= p[sw];

                                p_c2nl_p(data,l,sc,len);

                                p[sw]=l;

                                }

                        else

                                {

                                ew=(c->num>>2);

                                ec=(c->num&0x03);

                                l= p[sw];

                                p_c2nl(data,l,sc);

                                p[sw++]=l;

                                for (; sw < ew; sw++)

                                        { c2nl(data,l); p[sw]=l; }

                                if (ec)

                                        {

                                        c2nl_p(data,l,ec);

                                        p[sw]=l;

                                        }

                                }

                        return;

                        }

                }

        /* we now can process the input data in blocks of SHA_CBLOCK

         * chars and save the leftovers to c->data. */

        p=c->data;

        while (len >= SHA_CBLOCK)

                {

#if defined(B_ENDIAN) || defined(L_ENDIAN)

                memcpy(p,data,SHA_CBLOCK);

                data+=SHA_CBLOCK;

#ifdef L_ENDIAN

                for (sw=(SHA_LBLOCK/4); sw; sw--)

                        {

                        Endian_Reverse32(p[0]);

                        Endian_Reverse32(p[1]);

                        Endian_Reverse32(p[2]);

                        Endian_Reverse32(p[3]);

                        p+=4;

                        }

#endif

#else

                for (sw=(SHA_BLOCK/4); sw; sw--)

                        {

                        c2nl(data,l); *(p++)=l;

                        c2nl(data,l); *(p++)=l;

                        c2nl(data,l); *(p++)=l;

                        c2nl(data,l); *(p++)=l;

                        }

#endif

                p=c->data;

                sha1_block(c,p);

                len-=SHA_CBLOCK;

                }

        ec=(int)len;

        c->num=ec;

        ew=(ec>>2);

        ec&=0x03;

        for (sw=0; sw < ew; sw++)

                { c2nl(data,l); p[sw]=l; }

        c2nl_p(data,l,ec);

        p[sw]=l;

        }

static void sha1_block(c, X)

SHA_CTX *c;

register unsigned long *X;

        {

        register ULONG A,B,C,D,E,T;

        A=c->h0;

        B=c->h1;

        C=c->h2;

        D=c->h3;

        E=c->h4;

        BODY_00_15( 0,A,B,C,D,E,T);

        BODY_00_15( 1,T,A,B,C,D,E);

        BODY_00_15( 2,E,T,A,B,C,D);

        BODY_00_15( 3,D,E,T,A,B,C);

        BODY_00_15( 4,C,D,E,T,A,B);

        BODY_00_15( 5,B,C,D,E,T,A);

        BODY_00_15( 6,A,B,C,D,E,T);

        BODY_00_15( 7,T,A,B,C,D,E);

        BODY_00_15( 8,E,T,A,B,C,D);

        BODY_00_15( 9,D,E,T,A,B,C);

        BODY_00_15(10,C,D,E,T,A,B);

        BODY_00_15(11,B,C,D,E,T,A);

        BODY_00_15(12,A,B,C,D,E,T);

        BODY_00_15(13,T,A,B,C,D,E);

        BODY_00_15(14,E,T,A,B,C,D);

        BODY_00_15(15,D,E,T,A,B,C);

        BODY_16_19(16,C,D,E,T,A,B);

        BODY_16_19(17,B,C,D,E,T,A);

        BODY_16_19(18,A,B,C,D,E,T);

        BODY_16_19(19,T,A,B,C,D,E);

        BODY_20_39(20,E,T,A,B,C,D);

        BODY_20_39(21,D,E,T,A,B,C);

        BODY_20_39(22,C,D,E,T,A,B);

        BODY_20_39(23,B,C,D,E,T,A);

        BODY_20_39(24,A,B,C,D,E,T);

        BODY_20_39(25,T,A,B,C,D,E);

        BODY_20_39(26,E,T,A,B,C,D);

        BODY_20_39(27,D,E,T,A,B,C);

        BODY_20_39(28,C,D,E,T,A,B);

        BODY_20_39(29,B,C,D,E,T,A);

        BODY_20_39(30,A,B,C,D,E,T);

        BODY_20_39(31,T,A,B,C,D,E);

        BODY_20_39(32,E,T,A,B,C,D);

        BODY_20_39(33,D,E,T,A,B,C);

        BODY_20_39(34,C,D,E,T,A,B);

        BODY_20_39(35,B,C,D,E,T,A);

        BODY_20_39(36,A,B,C,D,E,T);

        BODY_20_39(37,T,A,B,C,D,E);

        BODY_20_39(38,E,T,A,B,C,D);

        BODY_20_39(39,D,E,T,A,B,C);

        BODY_40_59(40,C,D,E,T,A,B);

        BODY_40_59(41,B,C,D,E,T,A);

        BODY_40_59(42,A,B,C,D,E,T);

        BODY_40_59(43,T,A,B,C,D,E);

        BODY_40_59(44,E,T,A,B,C,D);

        BODY_40_59(45,D,E,T,A,B,C);

        BODY_40_59(46,C,D,E,T,A,B);

        BODY_40_59(47,B,C,D,E,T,A);

        BODY_40_59(48,A,B,C,D,E,T);

        BODY_40_59(49,T,A,B,C,D,E);

        BODY_40_59(50,E,T,A,B,C,D);

        BODY_40_59(51,D,E,T,A,B,C);

        BODY_40_59(52,C,D,E,T,A,B);

        BODY_40_59(53,B,C,D,E,T,A);

        BODY_40_59(54,A,B,C,D,E,T);

        BODY_40_59(55,T,A,B,C,D,E);

        BODY_40_59(56,E,T,A,B,C,D);

        BODY_40_59(57,D,E,T,A,B,C);

        BODY_40_59(58,C,D,E,T,A,B);

        BODY_40_59(59,B,C,D,E,T,A);

        BODY_60_79(60,A,B,C,D,E,T);

        BODY_60_79(61,T,A,B,C,D,E);

        BODY_60_79(62,E,T,A,B,C,D);

        BODY_60_79(63,D,E,T,A,B,C);

        BODY_60_79(64,C,D,E,T,A,B);

        BODY_60_79(65,B,C,D,E,T,A);

        BODY_60_79(66,A,B,C,D,E,T);

        BODY_60_79(67,T,A,B,C,D,E);

        BODY_60_79(68,E,T,A,B,C,D);

        BODY_60_79(69,D,E,T,A,B,C);

        BODY_60_79(70,C,D,E,T,A,B);

        BODY_60_79(71,B,C,D,E,T,A);

        BODY_60_79(72,A,B,C,D,E,T);

        BODY_60_79(73,T,A,B,C,D,E);

        BODY_60_79(74,E,T,A,B,C,D);

        BODY_60_79(75,D,E,T,A,B,C);

        BODY_60_79(76,C,D,E,T,A,B);

        BODY_60_79(77,B,C,D,E,T,A);

        BODY_60_79(78,A,B,C,D,E,T);

        BODY_60_79(79,T,A,B,C,D,E);

        c->h0=(c->h0+E)&0xffffffff;

        c->h1=(c->h1+T)&0xffffffff;

        c->h2=(c->h2+A)&0xffffffff;

        c->h3=(c->h3+B)&0xffffffff;

        c->h4=(c->h4+C)&0xffffffff;

        }

void SHA1_Final(md, c)

unsigned char *md;

SHA_CTX *c;

        {

        register int i,j;

        register ULONG l;

        register ULONG *p;

        static unsigned char end[4]={0x80,0x00,0x00,0x00};

        unsigned char *cp=end;

        /* c->num should definitly have room for at least one more byte. */

        p=c->data;

        j=c->num;

        i=j>>2;

#ifdef PURIFY

        if ((j&0x03) == 0) p[i]=0;

#endif

        l=p[i];

        p_c2nl(cp,l,j&0x03);

        p[i]=l;

        i++;

        /* i is the next 'undefined word' */

        if (c->num >= SHA_LAST_BLOCK)

                {

                for (; i<SHA_LBLOCK; i++)

                        p[i]=0;

                sha1_block(c,p);

                i=0;

                }

        for (; i<(SHA_LBLOCK-2); i++)

                p[i]=0;

        p[SHA_LBLOCK-2]=c->Nh;

        p[SHA_LBLOCK-1]=c->Nl;

        sha1_block(c,p);

        cp=md;

        l=c->h0; nl2c(l,cp);

        l=c->h1; nl2c(l,cp);

        l=c->h2; nl2c(l,cp);

        l=c->h3; nl2c(l,cp);

        l=c->h4; nl2c(l,cp);

        /* clear stuff, sha1_block may be leaving some stuff on the stack

         * but I'm not worried :-) */

        c->num=0;

/*      memset((char *)&c,0,sizeof(c));*/

        }

#ifdef undef

int printit(l)

unsigned long *l;

        {

        int i,ii;

        for (i=0; i<2; i++)

                {

                for (ii=0; ii<8; ii++)

                        {

                        fprintf(stderr,"%08lx ",l[i*8+ii]);

                        }

                fprintf(stderr,"\n");

                }

        }

#endif

   /*

    * Pads used in key derivation

    */

static unsigned char  SHAPad1[40] =

        {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

static unsigned char  SHAPad2[40] =

        {0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2,

         0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2,

         0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2,

         0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2, 0xF2};

   /*

    * SHAInit(), SHAUpdate() and SHAFinal() functions are an

    * implementation of Secure Hash Algorithm (SHA-1) [7]. These are

    * available in public domain or can be licensed from

    * RSA Data Security, Inc.

    *

    * 1) H is 8 bytes long for 40 bit session keys.

    * 2) H is 16 bytes long for 128 bit session keys.

    * 3) H' is same as H when this routine is called for the first time

    *    for the session.

    * 4) The generated key is returned in H'. This is the "current" key.

    */

void

GetNewKeyFromSHA(StartKey, SessionKey, SessionKeyLength, InterimKey)

    unsigned char *StartKey;

    unsigned char *SessionKey;

    unsigned long SessionKeyLength;

    unsigned char *InterimKey;

{

    SHA_CTX Context;

    unsigned char Digest[SHA_DIGEST_LENGTH];

    SHA1_Init(&Context);

    SHA1_Update(&Context, StartKey, SessionKeyLength);

    SHA1_Update(&Context, SHAPad1, 40);

    SHA1_Update(&Context, SessionKey, SessionKeyLength);

    SHA1_Update(&Context, SHAPad2, 40);

    SHA1_Final(Digest,&Context);

    memcpy(InterimKey, Digest, SessionKeyLength);

}

/*==FILEVERSION 9707284==*/