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/* $Id: cbc_cksm.c,v 1.1 1995/12/14 06:52:44 tholo Exp $ */
/* Copyright (C) 1993 Eric Young - see README for more details */
#include "des_locl.h"
u_int32_t des_cbc_cksum(des_cblock (*input), des_cblock (*output), long int length, struct des_ks_struct *schedule, des_cblock (*ivec))
{
register u_int32_t tout0,tout1,tin0,tin1;
register long l=length;
u_int32_t tin[2],tout[2];
unsigned char *in,*out,*iv;
in=(unsigned char *)input;
out=(unsigned char *)output;
iv=(unsigned char *)ivec;
c2l(iv,tout0);
c2l(iv,tout1);
for (; l>0; l-=8)
{
if (l >= 8)
{
c2l(in,tin0);
c2l(in,tin1);
}
else
c2ln(in,tin0,tin1,l);
tin0^=tout0;
tin1^=tout1;
tin[0]=tin0;
tin[1]=tin1;
des_encrypt(tin,tout,
schedule,DES_ENCRYPT);
/* fix 15/10/91 eay - thanks to keithr@sco.COM */
tout0=tout[0];
tout1=tout[1];
}
if (out != NULL)
{
l2c(tout0,out);
l2c(tout1,out);
}
tout0=tin0=tin1=tin[0]=tin[1]=tout[0]=tout[1]=0;
return(tout1);
}
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