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Diffstat (limited to 'secure/lib/libdes/ede_enc.c')
| -rw-r--r-- | secure/lib/libdes/ede_enc.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/secure/lib/libdes/ede_enc.c b/secure/lib/libdes/ede_enc.c new file mode 100644 index 0000000..5084e94 --- /dev/null +++ b/secure/lib/libdes/ede_enc.c @@ -0,0 +1,163 @@ +/* lib/des/ede_enc.c */ +/* Copyright (C) 1995 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" + +void des_ede3_cbc_encrypt(input, output, length, ks1, ks2, ks3, ivec, encrypt) +des_cblock (*input); +des_cblock (*output); +long length; +des_key_schedule ks1; +des_key_schedule ks2; +des_key_schedule ks3; +des_cblock (*ivec); +int encrypt; + { + register unsigned long tin0,tin1; + register unsigned long tout0,tout1,xor0,xor1; + register unsigned char *in,*out; + register long l=length; + unsigned long tin[2]; + unsigned char *iv; + + 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; + tin1^=tout1; + + IP(tin0,tin1); + + tin[0]=tin0; + tin[1]=tin1; + des_encrypt2((unsigned long *)tin,ks1,DES_ENCRYPT); + des_encrypt2((unsigned long *)tin,ks2,DES_DECRYPT); + des_encrypt2((unsigned long *)tin,ks3,DES_ENCRYPT); + tout0=tin[0]; + tout1=tin[1]; + + FP(tout1,tout0); + + l2c(tout0,out); + 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) + { + register unsigned long t0,t1; + + c2l(in,tin0); + c2l(in,tin1); + + t0=tin0; + t1=tin1; + IP(tin0,tin1); + + tin[0]=tin0; + tin[1]=tin1; + des_encrypt2((unsigned long *)tin,ks3,DES_DECRYPT); + des_encrypt2((unsigned long *)tin,ks2,DES_ENCRYPT); + des_encrypt2((unsigned long *)tin,ks1,DES_DECRYPT); + tout0=tin[0]; + tout1=tin[1]; + + FP(tout1,tout0); /**/ + + tout0^=xor0; + tout1^=xor1; + if (l >= 8) + { + l2c(tout0,out); + l2c(tout1,out); + } + else + l2cn(tout0,tout1,out,l); + xor0=t0; + xor1=t1; + } + iv=(unsigned char *)ivec; + l2c(xor0,iv); + l2c(xor1,iv); + } + tin0=tin1=tout0=tout1=xor0=xor1=0; + tin[0]=tin[1]=0; + } + +#ifdef undef /* MACRO */ +void des_ede2_cbc_encrypt(input, output, length, ks1, ks2, ivec, enc) +des_cblock (*input); +des_cblock (*output); +long length; +des_key_schedule ks1; +des_key_schedule ks2; +des_cblock (*ivec); +int enc; + { + des_ede3_cbc_encrypt(input,output,length,ks1,ks2,ks1,ivec,enc); + } +#endif |
