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Diffstat (limited to 'eBones/des/qud_cksm.c')
-rw-r--r--eBones/des/qud_cksm.c93
1 files changed, 0 insertions, 93 deletions
diff --git a/eBones/des/qud_cksm.c b/eBones/des/qud_cksm.c
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--- a/eBones/des/qud_cksm.c
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@@ -1,93 +0,0 @@
-/* qud_cksm.c */
-/* Copyright (C) 1993 Eric Young - see README for more details */
-
-/*-
- * $Id: qud_cksm.c,v 1.1.1.1 1994/09/30 14:49:51 csgr Exp $
- */
-
-/* From "Message Authentication" R.R. Jueneman, S.M. Matyas, C.H. Meyer
- * IEEE Communications Magazine Sept 1985 Vol. 23 No. 9 p 29-40
- * This module in only based on the code in this paper and is
- * almost definitely not the same as the MIT implementation.
- */
-#include "des_locl.h"
-
-/* bug fix for dos - 7/6/91 - Larry hughes@logos.ucs.indiana.edu */
-#define B0(a) (((unsigned long)(a)))
-#define B1(a) (((unsigned long)(a))<<8)
-#define B2(a) (((unsigned long)(a))<<16)
-#define B3(a) (((unsigned long)(a))<<24)
-
-/* used to scramble things a bit */
-/* Got the value MIT uses via brute force :-) 2/10/90 eay */
-#define NOISE ((unsigned long)83653421)
-
-unsigned long des_quad_cksum(input,output,length,out_count,seed)
-des_cblock *input;
-des_cblock *output;
-long length;
-int out_count;
-des_cblock *seed;
- {
- unsigned long z0,z1,t0,t1;
- int i;
- long l=0;
- unsigned char *cp;
- unsigned char *lp;
-
- if (out_count < 1) out_count=1;
- lp=(unsigned char *)output;
-
- z0=B0((*seed)[0])|B1((*seed)[1])|B2((*seed)[2])|B3((*seed)[3]);
- z1=B0((*seed)[4])|B1((*seed)[5])|B2((*seed)[6])|B3((*seed)[7]);
-
- for (i=0; ((i<4)&&(i<out_count)); i++)
- {
- cp=(unsigned char *)input;
- l=length;
- while (l > 0)
- {
- if (l > 1)
- {
- t0= (unsigned long)(*(cp++));
- t0|=(unsigned long)B1(*(cp++));
- l--;
- }
- else
- t0= (unsigned long)(*(cp++));
- l--;
- /* add */
- t0+=z0;
- t0&=0xffffffff;
- t1=z1;
- /* square, well sort of square */
- z0=((((t0*t0)&0xffffffff)+((t1*t1)&0xffffffff))
- &0xffffffff)%0x7fffffff;
- z1=((t0*((t1+NOISE)&0xffffffff))&0xffffffff)%0x7fffffff;
- }
- if (lp != NULL)
- {
- /* I believe I finally have things worked out.
- * The MIT library assumes that the checksum
- * is one huge number and it is returned in a
- * host dependant byte order.
- */
- static unsigned long l=1;
- static unsigned char *c=(unsigned char *)&l;
-
- if (c[0])
- {
- l2c(z0,lp);
- l2c(z1,lp);
- }
- else
- {
- lp=output[out_count-i-1];
- l2n(z1,lp);
- l2n(z0,lp);
- }
- }
- }
- return(z0);
- }
-