// tdes.cc// test DES functions// copyright SafeTP Development Group, Inc., 2000  Terms of use are as specified in license.txt#include "des.h"         // TripleDES_{Encryption,Decryption}#include "modes.h"       // CBC{Encryption,Decryption}#include "datablok.h"    // DataBlock#include <ctype.h>       // isprint#include <string.h>      // memcpy#include <stdio.h>       // printf#include <iostream.h>    // cout// simple utilvoid printBlock(byte const *data, int len, char const *label = NULL){  DataBlock db(data, len);  db.print(label);}// test a single encryption and decryptionbool testEncDec(BlockTransformation &enc, BlockTransformation &dec){  byte const *data = (byte const*)"MS Sucks";    // 8 (block size) bytes of data  byte output[8];    // output buffer  // encrypt  enc.ProcessBlock(data /*in*/, output /*out*/);  printBlock(output, 8, "ciphertext");  // decrypt  dec.ProcessBlock(output /*in, out*/);  // compare  printBlock(output, 8, "output");  bool ret = 0==memcmp(data, output, 8);  if (ret) {    printf("(success)\n");  }  else {    printf("(failure)\n");  }  printf("\n");  return ret;}bool test(bool fail){  byte const *key = (byte const*)"abcdefghijklmnopqrstuvwx";    // 24 bytes - 192 raw bits, of which only 168 will be used    // (I don't set or check the unused, e.g. as parity)  // test TripleDES in ECB mode  TripleDES_Encryption enc(key+fail);  TripleDES_Decryption dec(key);  testEncDec(enc, dec);  // test Triple-DES in CBC mode  byte const *IV = (byte const*)"ivector!";    // 8 byte initialization vector  CBCEncryption enc2(enc, IV);  CBCDecryption dec2(dec, IV);  bool ok = true;  ok &= testEncDec(enc2, dec2);  ok &= testEncDec(enc2, dec2);     // ciphertext should be different  return ok;}bool doit(){  bool ok = true;  printf("------ should succeed --------\n");  ok &= test(false /*fail*/);  printf("------ should fail ---------\n");  ok &= !test(true /*fail*/);  return ok;}int main(){  try {    if (doit()) {      cout << "all tests succeeded\n";      return 0;    }    else {      cout << "at least one test failed\n";      return 2;    }  }  catch (xBase &x) {    cout << "exception caught: " << x << endl;    return 4;  }}