/* crypto/sha/sha_dgst.c */ /* 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 #include #define SHA_0 #undef SHA_1 #include #include "sha_locl.h" #include #ifndef NO_SHA0 char *SHA_version="SHA" OPENSSL_VERSION_PTEXT; /* Implemented from SHA-0 document - The Secure Hash Algorithm */ #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 #define K_00_19 0x5a827999UL #define K_20_39 0x6ed9eba1UL #define K_40_59 0x8f1bbcdcUL #define K_60_79 0xca62c1d6UL static void sha_block(SHA_CTX *c, register SHA_LONG *p, int num); #if !defined(B_ENDIAN) && defined(SHA_ASM) # define M_c2nl c2l # define M_p_c2nl p_c2l # define M_c2nl_p c2l_p # define M_p_c2nl_p p_c2l_p # define M_nl2c l2c #else # define M_c2nl c2nl # define M_p_c2nl p_c2nl # define M_c2nl_p c2nl_p # define M_p_c2nl_p p_c2nl_p # define M_nl2c nl2c #endif void SHA_Init(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 SHA_Update(SHA_CTX *c, register const unsigned char *data, unsigned long len) { register SHA_LONG *p; int ew,ec,sw,sc; SHA_LONG l; if (len == 0) return; l=(c->Nl+(len<<3))&0xffffffffL; 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]; M_p_c2nl(data,l,sc); p[sw++]=l; for (; swnum); sha_block(c,p,1); c->num=0; /* drop through and do the rest */ } else { c->num+=(int)len; if ((sc+len) < 4) /* ugly, add char's to a word */ { l= p[sw]; M_p_c2nl_p(data,l,sc,len); p[sw]=l; } else { ew=(c->num>>2); ec=(c->num&0x03); l= p[sw]; M_p_c2nl(data,l,sc); p[sw++]=l; for (; sw < ew; sw++) { M_c2nl(data,l); p[sw]=l; } if (ec) { M_c2nl_p(data,l,ec); p[sw]=l; } } return; } } /* We can only do the following code for assember, the reason * being that the sha_block 'C' version changes the values * in the 'data' array. The assember code avoids this and * copies it to a local array. I should be able to do this for * the C version as well.... */ #if SHA_LONG_LOG2==2 #if defined(B_ENDIAN) || defined(SHA_ASM) if ((((unsigned long)data)%sizeof(SHA_LONG)) == 0) { sw=len/SHA_CBLOCK; if (sw) { sha_block(c,(SHA_LONG *)data,sw); sw*=SHA_CBLOCK; data+=sw; len-=sw; } } #endif #endif /* 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 SHA_LONG_LOG2==2 #if defined(B_ENDIAN) || defined(SHA_ASM) #define SHA_NO_TAIL_CODE /* * Basically we get here only when data happens * to be unaligned. */ if (p != (SHA_LONG *)data) memcpy(p,data,SHA_CBLOCK); data+=SHA_CBLOCK; sha_block(c,p=c->data,1); len-=SHA_CBLOCK; #elif defined(L_ENDIAN) #define BE_COPY(dst,src,i) { \ l = ((SHA_LONG *)src)[i]; \ Endian_Reverse32(l); \ dst[i] = l; \ } if ((((unsigned long)data)%sizeof(SHA_LONG)) == 0) { for (sw=(SHA_LBLOCK/4); sw; sw--) { BE_COPY(p,data,0); BE_COPY(p,data,1); BE_COPY(p,data,2); BE_COPY(p,data,3); p+=4; data += 4*sizeof(SHA_LONG); } sha_block(c,p=c->data,1); len-=SHA_CBLOCK; continue; } #endif #endif #ifndef SHA_NO_TAIL_CODE /* * In addition to "sizeof(SHA_LONG)!= 4" case the * following code covers unaligned access cases on * little-endian machines. * */ p=c->data; for (sw=(SHA_LBLOCK/4); sw; sw--) { M_c2nl(data,l); p[0]=l; M_c2nl(data,l); p[1]=l; M_c2nl(data,l); p[2]=l; M_c2nl(data,l); p[3]=l; p+=4; } p=c->data; sha_block(c,p,1); len-=SHA_CBLOCK; #endif } ec=(int)len; c->num=ec; ew=(ec>>2); ec&=0x03; for (sw=0; sw < ew; sw++) { M_c2nl(data,l); p[sw]=l; } M_c2nl_p(data,l,ec); p[sw]=l; } void SHA_Transform(SHA_CTX *c, unsigned char *b) { SHA_LONG p[SHA_LBLOCK]; #if SHA_LONG_LOG2==2 #if defined(B_ENDIAN) || defined(SHA_ASM) memcpy(p,b,SHA_CBLOCK); sha_block(c,p,1); return; #elif defined(L_ENDIAN) if (((unsigned long)b%sizeof(SHA_LONG)) == 0) { SHA_LONG *q; int i; q=p; for (i=(SHA_LBLOCK/4); i; i--) { unsigned long l; BE_COPY(q,b,0); /* BE_COPY was defined above */ BE_COPY(q,b,1); BE_COPY(q,b,2); BE_COPY(q,b,3); q+=4; b+=4*sizeof(SHA_LONG); } sha_block(c,p,1); return; } #endif #endif #ifndef SHA_NO_TAIL_CODE /* defined above, see comment */ { SHA_LONG *q; int i; q=p; for (i=(SHA_LBLOCK/4); i; i--) { SHA_LONG l; c2nl(b,l); *(q++)=l; c2nl(b,l); *(q++)=l; c2nl(b,l); *(q++)=l; c2nl(b,l); *(q++)=l; } sha_block(c,p,1); } #endif } #ifndef SHA_ASM static void sha_block(SHA_CTX *c, register SHA_LONG *W, int num) { register SHA_LONG A,B,C,D,E,T; SHA_LONG X[SHA_LBLOCK]; A=c->h0; B=c->h1; C=c->h2; D=c->h3; E=c->h4; for (;;) { BODY_00_15( 0,A,B,C,D,E,T,W); BODY_00_15( 1,T,A,B,C,D,E,W); BODY_00_15( 2,E,T,A,B,C,D,W); BODY_00_15( 3,D,E,T,A,B,C,W); BODY_00_15( 4,C,D,E,T,A,B,W); BODY_00_15( 5,B,C,D,E,T,A,W); BODY_00_15( 6,A,B,C,D,E,T,W); BODY_00_15( 7,T,A,B,C,D,E,W); BODY_00_15( 8,E,T,A,B,C,D,W); BODY_00_15( 9,D,E,T,A,B,C,W); BODY_00_15(10,C,D,E,T,A,B,W); BODY_00_15(11,B,C,D,E,T,A,W); BODY_00_15(12,A,B,C,D,E,T,W); BODY_00_15(13,T,A,B,C,D,E,W); BODY_00_15(14,E,T,A,B,C,D,W); BODY_00_15(15,D,E,T,A,B,C,W); BODY_16_19(16,C,D,E,T,A,B,W,W,W,W); BODY_16_19(17,B,C,D,E,T,A,W,W,W,W); BODY_16_19(18,A,B,C,D,E,T,W,W,W,W); BODY_16_19(19,T,A,B,C,D,E,W,W,W,X); BODY_20_31(20,E,T,A,B,C,D,W,W,W,X); BODY_20_31(21,D,E,T,A,B,C,W,W,W,X); BODY_20_31(22,C,D,E,T,A,B,W,W,W,X); BODY_20_31(23,B,C,D,E,T,A,W,W,W,X); BODY_20_31(24,A,B,C,D,E,T,W,W,X,X); BODY_20_31(25,T,A,B,C,D,E,W,W,X,X); BODY_20_31(26,E,T,A,B,C,D,W,W,X,X); BODY_20_31(27,D,E,T,A,B,C,W,W,X,X); BODY_20_31(28,C,D,E,T,A,B,W,W,X,X); BODY_20_31(29,B,C,D,E,T,A,W,W,X,X); BODY_20_31(30,A,B,C,D,E,T,W,X,X,X); BODY_20_31(31,T,A,B,C,D,E,W,X,X,X); BODY_32_39(32,E,T,A,B,C,D,X); BODY_32_39(33,D,E,T,A,B,C,X); BODY_32_39(34,C,D,E,T,A,B,X); BODY_32_39(35,B,C,D,E,T,A,X); BODY_32_39(36,A,B,C,D,E,T,X); BODY_32_39(37,T,A,B,C,D,E,X); BODY_32_39(38,E,T,A,B,C,D,X); BODY_32_39(39,D,E,T,A,B,C,X); BODY_40_59(40,C,D,E,T,A,B,X); BODY_40_59(41,B,C,D,E,T,A,X); BODY_40_59(42,A,B,C,D,E,T,X); BODY_40_59(43,T,A,B,C,D,E,X); BODY_40_59(44,E,T,A,B,C,D,X); BODY_40_59(45,D,E,T,A,B,C,X); BODY_40_59(46,C,D,E,T,A,B,X); BODY_40_59(47,B,C,D,E,T,A,X); BODY_40_59(48,A,B,C,D,E,T,X); BODY_40_59(49,T,A,B,C,D,E,X); BODY_40_59(50,E,T,A,B,C,D,X); BODY_40_59(51,D,E,T,A,B,C,X); BODY_40_59(52,C,D,E,T,A,B,X); BODY_40_59(53,B,C,D,E,T,A,X); BODY_40_59(54,A,B,C,D,E,T,X); BODY_40_59(55,T,A,B,C,D,E,X); BODY_40_59(56,E,T,A,B,C,D,X); BODY_40_59(57,D,E,T,A,B,C,X); BODY_40_59(58,C,D,E,T,A,B,X); BODY_40_59(59,B,C,D,E,T,A,X); BODY_60_79(60,A,B,C,D,E,T,X); BODY_60_79(61,T,A,B,C,D,E,X); BODY_60_79(62,E,T,A,B,C,D,X); BODY_60_79(63,D,E,T,A,B,C,X); BODY_60_79(64,C,D,E,T,A,B,X); BODY_60_79(65,B,C,D,E,T,A,X); BODY_60_79(66,A,B,C,D,E,T,X); BODY_60_79(67,T,A,B,C,D,E,X); BODY_60_79(68,E,T,A,B,C,D,X); BODY_60_79(69,D,E,T,A,B,C,X); BODY_60_79(70,C,D,E,T,A,B,X); BODY_60_79(71,B,C,D,E,T,A,X); BODY_60_79(72,A,B,C,D,E,T,X); BODY_60_79(73,T,A,B,C,D,E,X); BODY_60_79(74,E,T,A,B,C,D,X); BODY_60_79(75,D,E,T,A,B,C,X); BODY_60_79(76,C,D,E,T,A,B,X); BODY_60_79(77,B,C,D,E,T,A,X); BODY_60_79(78,A,B,C,D,E,T,X); BODY_60_79(79,T,A,B,C,D,E,X); 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; W+=SHA_LBLOCK; /* Note! This can happen only when sizeof(SHA_LONG) * is 4. Whenever it's not the actual case this * function is never called with num larger than 1 * and we never advance down here. * */ } } #endif void SHA_Final(unsigned char *md, SHA_CTX *c) { register int i,j; register SHA_LONG l; register SHA_LONG *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]; M_p_c2nl(cp,l,j&0x03); p[i]=l; i++; /* i is the next 'undefined word' */ if (c->num >= SHA_LAST_BLOCK) { for (; iNh; p[SHA_LBLOCK-1]=c->Nl; #if SHA_LONG_LOG2==2 #if !defined(B_ENDIAN) && defined(SHA_ASM) Endian_Reverse32(p[SHA_LBLOCK-2]); Endian_Reverse32(p[SHA_LBLOCK-1]); #endif #endif sha_block(c,p,1); 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); c->num=0; /* sha_block may be leaving some stuff on the stack * but I'm not worried :-) memset((void *)c,0,sizeof(SHA_CTX)); */ } #endif