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authorryker <>1998-10-05 20:13:14 +0000
committerryker <>1998-10-05 20:13:14 +0000
commitaeeae06a79815dc190061534d47236cec09f9e32 (patch)
tree851692b9c2f9c04f077666855641900f19fdb217 /src/lib/libcrypto/des/qud_cksm.c
parenta4f79641824cbf9f60ca9d1168d1fcc46717a82a (diff)
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Import of SSLeay-0.9.0b with RSA and IDEA stubbed + OpenBSD build
functionality for shared libs. Note that routines such as sslv2_init and friends that use RSA will not work due to lack of RSA in this library. Needs documentation and help from ports for easy upgrade to full functionality where legally possible.
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1/* crypto/des/qud_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/* From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer
60 * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40
61 * This module in only based on the code in this paper and is
62 * almost definitely not the same as the MIT implementation.
63 */
64#include "des_locl.h"
65
66/* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */
67#define Q_B0(a) (((DES_LONG)(a)))
68#define Q_B1(a) (((DES_LONG)(a))<<8)
69#define Q_B2(a) (((DES_LONG)(a))<<16)
70#define Q_B3(a) (((DES_LONG)(a))<<24)
71
72/* used to scramble things a bit */
73/* Got the value MIT uses via brute force :-) 2/10/90 eay */
74#define NOISE ((DES_LONG)83653421L)
75
76DES_LONG des_quad_cksum(input, output, length, out_count, seed)
77des_cblock (*input);
78des_cblock (*output);
79long length;
80int out_count;
81des_cblock (*seed);
82 {
83 DES_LONG z0,z1,t0,t1;
84 int i;
85 long l;
86 unsigned char *cp;
87 unsigned char *lp;
88
89 if (out_count < 1) out_count=1;
90 lp=(unsigned char *)output;
91
92 z0=Q_B0((*seed)[0])|Q_B1((*seed)[1])|Q_B2((*seed)[2])|Q_B3((*seed)[3]);
93 z1=Q_B0((*seed)[4])|Q_B1((*seed)[5])|Q_B2((*seed)[6])|Q_B3((*seed)[7]);
94
95 for (i=0; ((i<4)&&(i<out_count)); i++)
96 {
97 cp=(unsigned char *)input;
98 l=length;
99 while (l > 0)
100 {
101 if (l > 1)
102 {
103 t0= (DES_LONG)(*(cp++));
104 t0|=(DES_LONG)Q_B1(*(cp++));
105 l--;
106 }
107 else
108 t0= (DES_LONG)(*(cp++));
109 l--;
110 /* add */
111 t0+=z0;
112 t0&=0xffffffffL;
113 t1=z1;
114 /* square, well sort of square */
115 z0=((((t0*t0)&0xffffffffL)+((t1*t1)&0xffffffffL))
116 &0xffffffffL)%0x7fffffffL;
117 z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL;
118 }
119 if (lp != NULL)
120 {
121 /* I believe I finally have things worked out.
122 * The MIT library assumes that the checksum
123 * is one huge number and it is returned in a
124 * host dependant byte order.
125 */
126 static DES_LONG ltmp=1;
127 static unsigned char *c=(unsigned char *)&ltmp;
128
129 if (c[0])
130 {
131 l2c(z0,lp);
132 l2c(z1,lp);
133 }
134 else
135 {
136 lp=output[out_count-i-1];
137 l2n(z1,lp);
138 l2n(z0,lp);
139 }
140 }
141 }
142 return(z0);
143 }
144