Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/des/cbc_cksm.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | #include "des_locl.h" |
| 60 | |
| 61 | DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output, |
| 62 | long length, DES_key_schedule *schedule, |
| 63 | const_DES_cblock *ivec) |
| 64 | { |
| 65 | register DES_LONG tout0,tout1,tin0,tin1; |
| 66 | register long l=length; |
| 67 | DES_LONG tin[2]; |
| 68 | unsigned char *out = &(*output)[0]; |
| 69 | const unsigned char *iv = &(*ivec)[0]; |
| 70 | |
| 71 | c2l(iv,tout0); |
| 72 | c2l(iv,tout1); |
| 73 | for (; l>0; l-=8) |
| 74 | { |
| 75 | if (l >= 8) |
| 76 | { |
| 77 | c2l(in,tin0); |
| 78 | c2l(in,tin1); |
| 79 | } |
| 80 | else |
| 81 | c2ln(in,tin0,tin1,l); |
| 82 | |
| 83 | tin0^=tout0; tin[0]=tin0; |
| 84 | tin1^=tout1; tin[1]=tin1; |
| 85 | DES_encrypt1((DES_LONG *)tin,schedule,DES_ENCRYPT); |
| 86 | /* fix 15/10/91 eay - thanks to keithr@sco.COM */ |
| 87 | tout0=tin[0]; |
| 88 | tout1=tin[1]; |
| 89 | } |
| 90 | if (out != NULL) |
| 91 | { |
| 92 | l2c(tout0,out); |
| 93 | l2c(tout1,out); |
| 94 | } |
| 95 | tout0=tin0=tin1=tin[0]=tin[1]=0; |
| 96 | /* |
| 97 | Transform the data in tout1 so that it will |
| 98 | match the return value that the MIT Kerberos |
| 99 | mit_des_cbc_cksum API returns. |
| 100 | */ |
| 101 | tout1 = ((tout1 >> 24L) & 0x000000FF) |
| 102 | | ((tout1 >> 8L) & 0x0000FF00) |
| 103 | | ((tout1 << 8L) & 0x00FF0000) |
| 104 | | ((tout1 << 24L) & 0xFF000000); |
| 105 | return(tout1); |
| 106 | } |