diff options
Diffstat (limited to 'secure/lib/libdes/cbc3_enc.c')
| -rw-r--r-- | secure/lib/libdes/cbc3_enc.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/secure/lib/libdes/cbc3_enc.c b/secure/lib/libdes/cbc3_enc.c new file mode 100644 index 0000000..11aa3ff --- /dev/null +++ b/secure/lib/libdes/cbc3_enc.c @@ -0,0 +1,88 @@ +/* lib/des/cbc3_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" + +/* HAS BUGS? DON'T USE */ +void des_3cbc_encrypt(input, output, length, ks1, ks2, iv1, iv2, encrypt) +des_cblock (*input); +des_cblock (*output); +long length; +des_key_schedule ks1; +des_key_schedule ks2; +des_cblock (*iv1); +des_cblock (*iv2); +int encrypt; + { + int off=(length-1)/8; + long l8=((length+7)/8)*8; + des_cblock niv1,niv2; + + if (encrypt == DES_ENCRYPT) + { + des_cbc_encrypt(input,output,length,ks1,iv1,encrypt); + if (length >= sizeof(des_cblock)) + memcpy(niv1,output[off],sizeof(des_cblock)); + des_cbc_encrypt(output,output,l8,ks2,iv1,!encrypt); + des_cbc_encrypt(output,output,l8,ks1,iv2, encrypt); + if (length >= sizeof(des_cblock)) + memcpy(niv2,output[off],sizeof(des_cblock)); + } + else + { + if (length >= sizeof(des_cblock)) + memcpy(niv2,input[off],sizeof(des_cblock)); + des_cbc_encrypt(input,output,l8,ks1,iv2,encrypt); + des_cbc_encrypt(output,output,l8,ks2,iv1,!encrypt); + if (length >= sizeof(des_cblock)) + memcpy(niv1,output[off],sizeof(des_cblock)); + des_cbc_encrypt(output,output,length,ks1,iv1, encrypt); + } + memcpy(*iv1,niv1,sizeof(des_cblock)); + memcpy(*iv2,niv2,sizeof(des_cblock)); + } + |
