sl@0: /* crypto/des/ncbc_enc.c */ sl@0: /* sl@0: * #included by: sl@0: * cbc_enc.c (DES_cbc_encrypt) sl@0: * des_enc.c (DES_ncbc_encrypt) sl@0: */ sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) sl@0: * All rights reserved. sl@0: * sl@0: * This package is an SSL implementation written sl@0: * by Eric Young (eay@cryptsoft.com). sl@0: * The implementation was written so as to conform with Netscapes SSL. sl@0: * sl@0: * This library is free for commercial and non-commercial use as long as sl@0: * the following conditions are aheared to. The following conditions sl@0: * apply to all code found in this distribution, be it the RC4, RSA, sl@0: * lhash, DES, etc., code; not just the SSL code. The SSL documentation sl@0: * included with this distribution is covered by the same copyright terms sl@0: * except that the holder is Tim Hudson (tjh@cryptsoft.com). sl@0: * sl@0: * Copyright remains Eric Young's, and as such any Copyright notices in sl@0: * the code are not to be removed. sl@0: * If this package is used in a product, Eric Young should be given attribution sl@0: * as the author of the parts of the library used. sl@0: * This can be in the form of a textual message at program startup or sl@0: * in documentation (online or textual) provided with the package. sl@0: * sl@0: * Redistribution and use in source and binary forms, with or without sl@0: * modification, are permitted provided that the following conditions sl@0: * are met: sl@0: * 1. Redistributions of source code must retain the copyright sl@0: * notice, this list of conditions and the following disclaimer. sl@0: * 2. Redistributions in binary form must reproduce the above copyright sl@0: * notice, this list of conditions and the following disclaimer in the sl@0: * documentation and/or other materials provided with the distribution. sl@0: * 3. All advertising materials mentioning features or use of this software sl@0: * must display the following acknowledgement: sl@0: * "This product includes cryptographic software written by sl@0: * Eric Young (eay@cryptsoft.com)" sl@0: * The word 'cryptographic' can be left out if the rouines from the library sl@0: * being used are not cryptographic related :-). sl@0: * 4. If you include any Windows specific code (or a derivative thereof) from sl@0: * the apps directory (application code) you must include an acknowledgement: sl@0: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" sl@0: * sl@0: * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND sl@0: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE sl@0: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE sl@0: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE sl@0: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL sl@0: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS sl@0: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) sl@0: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT sl@0: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY sl@0: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF sl@0: * SUCH DAMAGE. sl@0: * sl@0: * The licence and distribution terms for any publically available version or sl@0: * derivative of this code cannot be changed. i.e. this code cannot simply be sl@0: * copied and put under another distribution licence sl@0: * [including the GNU Public Licence.] sl@0: */ sl@0: sl@0: #include "des_locl.h" sl@0: sl@0: #ifdef CBC_ENC_C__DONT_UPDATE_IV sl@0: EXPORT_C void DES_cbc_encrypt(const unsigned char *in, unsigned char *out, long length, sl@0: DES_key_schedule *_schedule, DES_cblock *ivec, int enc) sl@0: #else sl@0: EXPORT_C void DES_ncbc_encrypt(const unsigned char *in, unsigned char *out, long length, sl@0: DES_key_schedule *_schedule, DES_cblock *ivec, int enc) sl@0: #endif sl@0: { sl@0: register DES_LONG tin0,tin1; sl@0: register DES_LONG tout0,tout1,xor0,xor1; sl@0: register long l=length; sl@0: DES_LONG tin[2]; sl@0: unsigned char *iv; sl@0: sl@0: iv = &(*ivec)[0]; sl@0: sl@0: if (enc) sl@0: { sl@0: c2l(iv,tout0); sl@0: c2l(iv,tout1); sl@0: for (l-=8; l>=0; l-=8) sl@0: { sl@0: c2l(in,tin0); sl@0: c2l(in,tin1); sl@0: tin0^=tout0; tin[0]=tin0; sl@0: tin1^=tout1; tin[1]=tin1; sl@0: DES_encrypt1((DES_LONG *)tin,_schedule,DES_ENCRYPT); sl@0: tout0=tin[0]; l2c(tout0,out); sl@0: tout1=tin[1]; l2c(tout1,out); sl@0: } sl@0: if (l != -8) sl@0: { sl@0: c2ln(in,tin0,tin1,l+8); sl@0: tin0^=tout0; tin[0]=tin0; sl@0: tin1^=tout1; tin[1]=tin1; sl@0: DES_encrypt1((DES_LONG *)tin,_schedule,DES_ENCRYPT); sl@0: tout0=tin[0]; l2c(tout0,out); sl@0: tout1=tin[1]; l2c(tout1,out); sl@0: } sl@0: #ifndef CBC_ENC_C__DONT_UPDATE_IV sl@0: iv = &(*ivec)[0]; sl@0: l2c(tout0,iv); sl@0: l2c(tout1,iv); sl@0: #endif sl@0: } sl@0: else sl@0: { sl@0: c2l(iv,xor0); sl@0: c2l(iv,xor1); sl@0: for (l-=8; l>=0; l-=8) sl@0: { sl@0: c2l(in,tin0); tin[0]=tin0; sl@0: c2l(in,tin1); tin[1]=tin1; sl@0: DES_encrypt1((DES_LONG *)tin,_schedule,DES_DECRYPT); sl@0: tout0=tin[0]^xor0; sl@0: tout1=tin[1]^xor1; sl@0: l2c(tout0,out); sl@0: l2c(tout1,out); sl@0: xor0=tin0; sl@0: xor1=tin1; sl@0: } sl@0: if (l != -8) sl@0: { sl@0: c2l(in,tin0); tin[0]=tin0; sl@0: c2l(in,tin1); tin[1]=tin1; sl@0: DES_encrypt1((DES_LONG *)tin,_schedule,DES_DECRYPT); sl@0: tout0=tin[0]^xor0; sl@0: tout1=tin[1]^xor1; sl@0: l2cn(tout0,tout1,out,l+8); sl@0: #ifndef CBC_ENC_C__DONT_UPDATE_IV sl@0: xor0=tin0; sl@0: xor1=tin1; sl@0: #endif sl@0: } sl@0: #ifndef CBC_ENC_C__DONT_UPDATE_IV sl@0: iv = &(*ivec)[0]; sl@0: l2c(xor0,iv); sl@0: l2c(xor1,iv); sl@0: #endif sl@0: } sl@0: tin0=tin1=tout0=tout1=xor0=xor1=0; sl@0: tin[0]=tin[1]=0; sl@0: }