/* crypto/des/fcrypt_b.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 <stdio.h> #include <openssl/crypto.h> /* This version of crypt has been developed from my MIT compatible * DES library. * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au * Eric Young (eay@cryptsoft.com) */ #define DES_FCRYPT #include "des_locl.h" #undef DES_FCRYPT #undef PERM_OP #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ (b)^=(t),\ (a)^=((t)<<(n))) #undef HPERM_OP #define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ (a)=(a)^(t)^(t>>(16-(n))))\ void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, DES_LONG Eswap1) { register DES_LONG l,r,t,u; #ifdef DES_PTR register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; #endif register DES_LONG *s; register int j; register DES_LONG E0,E1; l=0; r=0; s=(DES_LONG *)ks; E0=Eswap0; E1=Eswap1; for (j=0; j<25; j++) { #ifndef DES_UNROLL register int i; for (i=0; i<32; i+=4) { D_ENCRYPT(l,r,i+0); /* 1 */ D_ENCRYPT(r,l,i+2); /* 2 */ } #else D_ENCRYPT(l,r, 0); /* 1 */ D_ENCRYPT(r,l, 2); /* 2 */ D_ENCRYPT(l,r, 4); /* 3 */ D_ENCRYPT(r,l, 6); /* 4 */ D_ENCRYPT(l,r, 8); /* 5 */ D_ENCRYPT(r,l,10); /* 6 */ D_ENCRYPT(l,r,12); /* 7 */ D_ENCRYPT(r,l,14); /* 8 */ D_ENCRYPT(l,r,16); /* 9 */ D_ENCRYPT(r,l,18); /* 10 */ D_ENCRYPT(l,r,20); /* 11 */ D_ENCRYPT(r,l,22); /* 12 */ D_ENCRYPT(l,r,24); /* 13 */ D_ENCRYPT(r,l,26); /* 14 */ D_ENCRYPT(l,r,28); /* 15 */ D_ENCRYPT(r,l,30); /* 16 */ #endif t=l; l=r; r=t; } l=ROTATE(l,3)&0xffffffffL; r=ROTATE(r,3)&0xffffffffL; PERM_OP(l,r,t, 1,0x55555555L); PERM_OP(r,l,t, 8,0x00ff00ffL); PERM_OP(l,r,t, 2,0x33333333L); PERM_OP(r,l,t,16,0x0000ffffL); PERM_OP(l,r,t, 4,0x0f0f0f0fL); out[0]=r; out[1]=l; }