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Diffstat (limited to 'secure/lib/libdes/xcbc_enc.c')
| -rw-r--r-- | secure/lib/libdes/xcbc_enc.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/secure/lib/libdes/xcbc_enc.c b/secure/lib/libdes/xcbc_enc.c new file mode 100644 index 0000000..98bf631 --- /dev/null +++ b/secure/lib/libdes/xcbc_enc.c @@ -0,0 +1,132 @@ +/* crypto/des/xcbc_enc.c */ +/* Copyright (C) 1995-1996 Eric Young (eay@mincom.oz.au) + * All rights reserved. + * + * This file is part of an SSL implementation written + * by Eric Young (eay@mincom.oz.au). + * The implementation was written so as to conform with Netscapes SSL + * specification. This library and applications are + * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE + * as long as the following conditions are aheared to. + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. If this code is used in a product, + * Eric Young should be given attribution as the author of the parts 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 software developed by Eric Young (eay@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.] + */ + +#include "des_locl.h" + +/* RSA's DESX */ +void des_xcbc_encrypt(input, output, length, schedule, ivec, inw,outw,encrypt) +des_cblock (*input); +des_cblock (*output); +long length; +des_key_schedule schedule; +des_cblock (*ivec); +des_cblock (*inw); +des_cblock (*outw); +int encrypt; + { + register DES_LONG tin0,tin1; + register DES_LONG tout0,tout1,xor0,xor1; + register DES_LONG inW0,inW1,outW0,outW1; + register unsigned char *in,*out; + register long l=length; + DES_LONG tin[2]; + unsigned char *iv; + + in=(unsigned char *)inw; + c2l(in,inW0); + c2l(in,inW1); + in=(unsigned char *)outw; + c2l(in,outW0); + c2l(in,outW1); + + in=(unsigned char *)input; + out=(unsigned char *)output; + iv=(unsigned char *)ivec; + + if (encrypt) + { + c2l(iv,tout0); + c2l(iv,tout1); + for (; l>0; l-=8) + { + if (l >= 8) + { + c2l(in,tin0); + c2l(in,tin1); + } + else + c2ln(in,tin0,tin1,l); + tin0^=tout0^inW0; tin[0]=tin0; + tin1^=tout1^inW1; tin[1]=tin1; + des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT); + tout0=tin[0]^outW0; l2c(tout0,out); + tout1=tin[1]^outW1; l2c(tout1,out); + } + iv=(unsigned char *)ivec; + l2c(tout0,iv); + l2c(tout1,iv); + } + else + { + c2l(iv,xor0); + c2l(iv,xor1); + for (; l>0; l-=8) + { + c2l(in,tin0); tin[0]=tin0^outW0; + c2l(in,tin1); tin[1]=tin1^outW1; + des_encrypt((DES_LONG *)tin,schedule,DES_DECRYPT); + tout0=tin[0]^xor0^inW0; + tout1=tin[1]^xor1^inW1; + if (l >= 8) + { + l2c(tout0,out); + l2c(tout1,out); + } + else + l2cn(tout0,tout1,out,l); + xor0=tin0; + xor1=tin1; + } + iv=(unsigned char *)ivec; + l2c(xor0,iv); + l2c(xor1,iv); + } + tin0=tin1=tout0=tout1=xor0=xor1=0; + inW0=inW1=outW0=outW1=0; + tin[0]=tin[1]=0; + } + |
