1*0Sstevel@tonic-gate /* crypto/des/qud_cksm.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate * All rights reserved.
4*0Sstevel@tonic-gate *
5*0Sstevel@tonic-gate * This package is an SSL implementation written
6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate * the code are not to be removed.
18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate * as the author of the parts of the library used.
20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate *
23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate * are met:
26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate * must display the following acknowledgement:
33*0Sstevel@tonic-gate * "This product includes cryptographic software written by
34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate * being used are not cryptographic related :-).
37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate * SUCH DAMAGE.
52*0Sstevel@tonic-gate *
53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
55*0Sstevel@tonic-gate * copied and put under another distribution licence
56*0Sstevel@tonic-gate * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate */
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate /* From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer
60*0Sstevel@tonic-gate * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40
61*0Sstevel@tonic-gate * This module in only based on the code in this paper and is
62*0Sstevel@tonic-gate * almost definitely not the same as the MIT implementation.
63*0Sstevel@tonic-gate */
64*0Sstevel@tonic-gate #include "des_locl.h"
65*0Sstevel@tonic-gate
66*0Sstevel@tonic-gate /* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */
67*0Sstevel@tonic-gate #define Q_B0(a) (((DES_LONG)(a)))
68*0Sstevel@tonic-gate #define Q_B1(a) (((DES_LONG)(a))<<8)
69*0Sstevel@tonic-gate #define Q_B2(a) (((DES_LONG)(a))<<16)
70*0Sstevel@tonic-gate #define Q_B3(a) (((DES_LONG)(a))<<24)
71*0Sstevel@tonic-gate
72*0Sstevel@tonic-gate /* used to scramble things a bit */
73*0Sstevel@tonic-gate /* Got the value MIT uses via brute force :-) 2/10/90 eay */
74*0Sstevel@tonic-gate #define NOISE ((DES_LONG)83653421L)
75*0Sstevel@tonic-gate
DES_quad_cksum(const unsigned char * input,DES_cblock output[],long length,int out_count,DES_cblock * seed)76*0Sstevel@tonic-gate DES_LONG DES_quad_cksum(const unsigned char *input, DES_cblock output[],
77*0Sstevel@tonic-gate long length, int out_count, DES_cblock *seed)
78*0Sstevel@tonic-gate {
79*0Sstevel@tonic-gate DES_LONG z0,z1,t0,t1;
80*0Sstevel@tonic-gate int i;
81*0Sstevel@tonic-gate long l;
82*0Sstevel@tonic-gate const unsigned char *cp;
83*0Sstevel@tonic-gate #ifdef _CRAY
84*0Sstevel@tonic-gate struct lp_st { int a:32; int b:32; } *lp;
85*0Sstevel@tonic-gate #else
86*0Sstevel@tonic-gate DES_LONG *lp;
87*0Sstevel@tonic-gate #endif
88*0Sstevel@tonic-gate
89*0Sstevel@tonic-gate if (out_count < 1) out_count=1;
90*0Sstevel@tonic-gate #ifdef _CRAY
91*0Sstevel@tonic-gate lp = (struct lp_st *) &(output[0])[0];
92*0Sstevel@tonic-gate #else
93*0Sstevel@tonic-gate lp = (DES_LONG *) &(output[0])[0];
94*0Sstevel@tonic-gate #endif
95*0Sstevel@tonic-gate
96*0Sstevel@tonic-gate z0=Q_B0((*seed)[0])|Q_B1((*seed)[1])|Q_B2((*seed)[2])|Q_B3((*seed)[3]);
97*0Sstevel@tonic-gate z1=Q_B0((*seed)[4])|Q_B1((*seed)[5])|Q_B2((*seed)[6])|Q_B3((*seed)[7]);
98*0Sstevel@tonic-gate
99*0Sstevel@tonic-gate for (i=0; ((i<4)&&(i<out_count)); i++)
100*0Sstevel@tonic-gate {
101*0Sstevel@tonic-gate cp=input;
102*0Sstevel@tonic-gate l=length;
103*0Sstevel@tonic-gate while (l > 0)
104*0Sstevel@tonic-gate {
105*0Sstevel@tonic-gate if (l > 1)
106*0Sstevel@tonic-gate {
107*0Sstevel@tonic-gate t0= (DES_LONG)(*(cp++));
108*0Sstevel@tonic-gate t0|=(DES_LONG)Q_B1(*(cp++));
109*0Sstevel@tonic-gate l--;
110*0Sstevel@tonic-gate }
111*0Sstevel@tonic-gate else
112*0Sstevel@tonic-gate t0= (DES_LONG)(*(cp++));
113*0Sstevel@tonic-gate l--;
114*0Sstevel@tonic-gate /* add */
115*0Sstevel@tonic-gate t0+=z0;
116*0Sstevel@tonic-gate t0&=0xffffffffL;
117*0Sstevel@tonic-gate t1=z1;
118*0Sstevel@tonic-gate /* square, well sort of square */
119*0Sstevel@tonic-gate z0=((((t0*t0)&0xffffffffL)+((t1*t1)&0xffffffffL))
120*0Sstevel@tonic-gate &0xffffffffL)%0x7fffffffL;
121*0Sstevel@tonic-gate z1=((t0*((t1+NOISE)&0xffffffffL))&0xffffffffL)%0x7fffffffL;
122*0Sstevel@tonic-gate }
123*0Sstevel@tonic-gate if (lp != NULL)
124*0Sstevel@tonic-gate {
125*0Sstevel@tonic-gate /* The MIT library assumes that the checksum is
126*0Sstevel@tonic-gate * composed of 2*out_count 32 bit ints */
127*0Sstevel@tonic-gate #ifdef _CRAY
128*0Sstevel@tonic-gate (*lp).a = z0;
129*0Sstevel@tonic-gate (*lp).b = z1;
130*0Sstevel@tonic-gate lp++;
131*0Sstevel@tonic-gate #else
132*0Sstevel@tonic-gate *lp++ = z0;
133*0Sstevel@tonic-gate *lp++ = z1;
134*0Sstevel@tonic-gate #endif
135*0Sstevel@tonic-gate }
136*0Sstevel@tonic-gate }
137*0Sstevel@tonic-gate return(z0);
138*0Sstevel@tonic-gate }
139*0Sstevel@tonic-gate
140