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PsL Monthly 1993 December
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PSL Monthly Shareware CD-ROM (December 1993).iso
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prgmming
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dos
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c
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des_c.exe
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DESCERT.C
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1990-07-14
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956b
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69 lines
#include <stdio.h>
main()
{
char key[8],plain[8],cipher[8],answer[8];
int i;
int test;
int fail;
desinit(0);
for(test=0;!feof(stdin);test++){
get8(key);
printf(" K: "); put8(key);
setkey(key);
get8(plain);
printf(" P: "); put8(plain);
get8(answer);
printf(" C: "); put8(answer);
for(i=0;i<8;i++)
cipher[i] = plain[i];
endes(cipher);
for(i=0;i<8;i++)
if(cipher[i] != answer[i])
break;
fail = 0;
if(i != 8){
printf(" Encrypt FAIL");
fail++;
}
dedes(cipher);
for(i=0;i<8;i++)
if(cipher[i] != plain[i])
break;
if(i != 8){
printf(" Decrypt FAIL");
fail++;
}
if(fail == 0)
printf(" OK");
printf("\n");
}
}
get8(cp)
char *cp;
{
int i,t;
for(i=0;i<8;i++){
scanf("%2x",&t);
if(feof(stdin))
exit(0);
*cp++ = t;
}
}
put8(cp)
char *cp;
{
int i;
for(i=0;i<8;i++){
printf("%02x",*cp++ & 0xff);
}
}