| /* crypto/des/cbc3_enc.c */ |
| /* 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" |
| |
| /* HAS BUGS! DON'T USE - this is only present for use in des.c */ |
| void DES_3cbc_encrypt(DES_cblock *input, DES_cblock *output, long length, |
| DES_key_schedule ks1, DES_key_schedule ks2, |
| DES_cblock *iv1, DES_cblock *iv2, int enc) |
| { |
| int off = ((int)length - 1) / 8; |
| long l8 = ((length + 7) / 8) * 8; |
| DES_cblock niv1, niv2; |
| |
| if (enc == DES_ENCRYPT) { |
| DES_cbc_encrypt((unsigned char *)input, |
| (unsigned char *)output, length, &ks1, iv1, enc); |
| if (length >= sizeof(DES_cblock)) |
| memcpy(niv1, output[off], sizeof(DES_cblock)); |
| DES_cbc_encrypt((unsigned char *)output, |
| (unsigned char *)output, l8, &ks2, iv1, !enc); |
| DES_cbc_encrypt((unsigned char *)output, |
| (unsigned char *)output, l8, &ks1, iv2, enc); |
| 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((unsigned char *)input, |
| (unsigned char *)output, l8, &ks1, iv2, enc); |
| DES_cbc_encrypt((unsigned char *)output, |
| (unsigned char *)output, l8, &ks2, iv1, !enc); |
| if (length >= sizeof(DES_cblock)) |
| memcpy(niv1, output[off], sizeof(DES_cblock)); |
| DES_cbc_encrypt((unsigned char *)output, |
| (unsigned char *)output, length, &ks1, iv1, enc); |
| } |
| memcpy(*iv1, niv1, sizeof(DES_cblock)); |
| memcpy(*iv2, niv2, sizeof(DES_cblock)); |
| } |