/* $OpenBSD: des_enc.c,v 1.12 2014/10/28 07:35:58 jsg 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 "des_locl.h" #include "spr.h" #ifndef OPENBSD_DES_ASM void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) { DES_LONG l,r,t,u; #ifdef DES_PTR const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; #endif #ifndef DES_UNROLL int i; #endif DES_LONG *s; r=data[0]; l=data[1]; IP(r,l); /* Things have been modified so that the initial rotate is * done outside the loop. This required the * DES_SPtrans values in sp.h to be rotated 1 bit to the right. * One perl script later and things have a 5% speed up on a sparc2. * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> * for pointing this out. */ /* clear the top bits on machines with 8byte longs */ /* shift left by 2 */ r=ROTATE(r,29)&0xffffffffL; l=ROTATE(l,29)&0xffffffffL; s=ks->ks->deslong; /* I don't know if it is worth the effort of loop unrolling the * inner loop */ if (enc) { #ifdef DES_UNROLL 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 */ #else for (i=0; i<32; i+=4) { D_ENCRYPT(l,r,i+0); /* 1 */ D_ENCRYPT(r,l,i+2); /* 2 */ } #endif } else { #ifdef DES_UNROLL D_ENCRYPT(l,r,30); /* 16 */ D_ENCRYPT(r,l,28); /* 15 */ D_ENCRYPT(l,r,26); /* 14 */ D_ENCRYPT(r,l,24); /* 13 */ D_ENCRYPT(l,r,22); /* 12 */ D_ENCRYPT(r,l,20); /* 11 */ D_ENCRYPT(l,r,18); /* 10 */ D_ENCRYPT(r,l,16); /* 9 */ D_ENCRYPT(l,r,14); /* 8 */ D_ENCRYPT(r,l,12); /* 7 */ D_ENCRYPT(l,r,10); /* 6 */ D_ENCRYPT(r,l, 8); /* 5 */ D_ENCRYPT(l,r, 6); /* 4 */ D_ENCRYPT(r,l, 4); /* 3 */ D_ENCRYPT(l,r, 2); /* 2 */ D_ENCRYPT(r,l, 0); /* 1 */ #else for (i=30; i>0; i-=4) { D_ENCRYPT(l,r,i-0); /* 16 */ D_ENCRYPT(r,l,i-2); /* 15 */ } #endif } /* rotate and clear the top bits on machines with 8byte longs */ l=ROTATE(l,3)&0xffffffffL; r=ROTATE(r,3)&0xffffffffL; FP(r,l); data[0]=l; data[1]=r; l=r=t=u=0; } void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) { DES_LONG l,r,t,u; #ifdef DES_PTR const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; #endif #ifndef DES_UNROLL int i; #endif DES_LONG *s; r=data[0]; l=data[1]; /* Things have been modified so that the initial rotate is * done outside the loop. This required the * DES_SPtrans values in sp.h to be rotated 1 bit to the right. * One perl script later and things have a 5% speed up on a sparc2. * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> * for pointing this out. */ /* clear the top bits on machines with 8byte longs */ r=ROTATE(r,29)&0xffffffffL; l=ROTATE(l,29)&0xffffffffL; s=ks->ks->deslong; /* I don't know if it is worth the effort of loop unrolling the * inner loop */ if (enc) { #ifdef DES_UNROLL 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 */ #else for (i=0; i<32; i+=4) { D_ENCRYPT(l,r,i+0); /* 1 */ D_ENCRYPT(r,l,i+2); /* 2 */ } #endif } else { #ifdef DES_UNROLL D_ENCRYPT(l,r,30); /* 16 */ D_ENCRYPT(r,l,28); /* 15 */ D_ENCRYPT(l,r,26); /* 14 */ D_ENCRYPT(r,l,24); /* 13 */ D_ENCRYPT(l,r,22); /* 12 */ D_ENCRYPT(r,l,20); /* 11 */ D_ENCRYPT(l,r,18); /* 10 */ D_ENCRYPT(r,l,16); /* 9 */ D_ENCRYPT(l,r,14); /* 8 */ D_ENCRYPT(r,l,12); /* 7 */ D_ENCRYPT(l,r,10); /* 6 */ D_ENCRYPT(r,l, 8); /* 5 */ D_ENCRYPT(l,r, 6); /* 4 */ D_ENCRYPT(r,l, 4); /* 3 */ D_ENCRYPT(l,r, 2); /* 2 */ D_ENCRYPT(r,l, 0); /* 1 */ #else for (i=30; i>0; i-=4) { D_ENCRYPT(l,r,i-0); /* 16 */ D_ENCRYPT(r,l,i-2); /* 15 */ } #endif } /* rotate and clear the top bits on machines with 8byte longs */ data[0]=ROTATE(l,3)&0xffffffffL; data[1]=ROTATE(r,3)&0xffffffffL; l=r=t=u=0; } #endif /* OPENBSD_DES_ASM */ void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, DES_key_schedule *ks2, DES_key_schedule *ks3) { DES_LONG l,r; l=data[0]; r=data[1]; IP(l,r); data[0]=l; data[1]=r; DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); l=data[0]; r=data[1]; FP(r,l); data[0]=l; data[1]=r; } void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, DES_key_schedule *ks2, DES_key_schedule *ks3) { DES_LONG l,r; l=data[0]; r=data[1]; IP(l,r); data[0]=l; data[1]=r; DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); l=data[0]; r=data[1]; FP(r,l); data[0]=l; data[1]=r; } #ifndef DES_DEFAULT_OPTIONS #undef CBC_ENC_C__DONT_UPDATE_IV #include "ncbc_enc.c" /* DES_ncbc_encrypt */ void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, long length, DES_key_schedule *ks1, DES_key_schedule *ks2, DES_key_schedule *ks3, DES_cblock *ivec, int enc) { DES_LONG tin0,tin1; DES_LONG tout0,tout1,xor0,xor1; const unsigned char *in; unsigned char *out; long l=length; DES_LONG tin[2]; unsigned char *iv; in=input; out=output; iv = &(*ivec)[0]; if (enc) { c2l(iv,tout0); c2l(iv,tout1); for (l-=8; l>=0; l-=8) { c2l(in,tin0); c2l(in,tin1); tin0^=tout0; tin1^=tout1; tin[0]=tin0; tin[1]=tin1; DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); tout0=tin[0]; tout1=tin[1]; l2c(tout0,out); l2c(tout1,out); } if (l != -8) { c2ln(in,tin0,tin1,l+8); tin0^=tout0; tin1^=tout1; tin[0]=tin0; tin[1]=tin1; DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); tout0=tin[0]; tout1=tin[1]; l2c(tout0,out); l2c(tout1,out); } iv = &(*ivec)[0]; l2c(tout0,iv); l2c(tout1,iv); } else { DES_LONG t0,t1; c2l(iv,xor0); c2l(iv,xor1); for (l-=8; l>=0; l-=8) { c2l(in,tin0); c2l(in,tin1); t0=tin0; t1=tin1; tin[0]=tin0; tin[1]=tin1; DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); tout0=tin[0]; tout1=tin[1]; tout0^=xor0; tout1^=xor1; l2c(tout0,out); l2c(tout1,out); xor0=t0; xor1=t1; } if (l != -8) { c2l(in,tin0); c2l(in,tin1); t0=tin0; t1=tin1; tin[0]=tin0; tin[1]=tin1; DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); tout0=tin[0]; tout1=tin[1]; tout0^=xor0; tout1^=xor1; l2cn(tout0,tout1,out,l+8); xor0=t0; xor1=t1; } iv = &(*ivec)[0]; l2c(xor0,iv); l2c(xor1,iv); } tin0=tin1=tout0=tout1=xor0=xor1=0; tin[0]=tin[1]=0; } #endif /* DES_DEFAULT_OPTIONS */
