39 lines
935 B
C
39 lines
935 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include "spn.h"
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int main(int argc, char const *argv[])
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{
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unsigned char ungarbled[5] = {'t','e','s','t','!'};
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unsigned char garbled[5] = {0x52, 0xA3, 0x63, 0x52, 0x6B};
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unsigned char perm[8] = {5,2,0,4,6,1,7,3};
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unsigned char subst[16] = {3,8,14,1,12,5,10,0,2,7,9,11,4,6,15,13};
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unsigned char iperm[8], isubst[16];
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for (int i = 0; i < 8; i++) {
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iperm[perm[i]] = i;
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}
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for (int i = 0; i < 16; i++) {
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isubst[subst[i]] = i;
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}
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for (unsigned short key = 0; key < 65535; key++) {
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int found = 0;
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for (int j = 0; j < 5; j++) {
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unsigned char w = decrypt(garbled[j], key, iperm, isubst);
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//if (w != ungarbled[j]) break;
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if (w == ungarbled[j]) found++;
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}
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if (found == 5) {
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printf("key found: %04x\n", key);
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//break;
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}
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}
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return 0;
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}
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