sha1test.c

加解密包

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "crypto.h"

/**
   DES3KeyGen()
   Purpose:    Generate 3DES key based on a given password
   Return:
   1   : successful
   0   : failed
   101 : password length > 70
**/
int DES3KeyGen(char *sPassword, Byte *key) {
  HSHA1 hSha1;
  unsigned char md1[20],md2[20];
  char buf[200];
  char gsalt[20]=
    {0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x50,
     0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x00};
  char gpad[20]=
    {0x11,0x12,0x13,0x11,0x15,0x16,0x17,0x18,0x19,0x11,
     0x21,0x22,0x33,0x14,0x55,0x26,0x17,0x38,0x59,0x00};
  int nNeedSize;
  int i;

  nNeedSize = strlen(sPassword);
  /* Password Size must less than 70 */
  if (nNeedSize > 70)
    return 101;
  memset(buf, 0, 200);
  strcpy(buf, gsalt);
  strcat(buf, sPassword);
  strcat(buf, gpad);
  printf("str:len: [%s][%d]\n",buf,strlen(buf));

  hSha1 = Sha1Init();
  Sha1Update(hSha1,(unsigned char*)buf,strlen(buf));
  Sha1Final(md1,hSha1);
  CloseSha1(hSha1);
  printf("\n"); for (i=0;i<20;i++) { printf ("%02x",md1[i]); } printf("\n\n");

  memset(buf, 0, 200);
  strcpy(buf,sPassword);
  strcat(buf,gpad);
  strcat(buf,sPassword);
  printf("str:len: [%s][%d]\n",buf,strlen(buf));

  hSha1 = Sha1Init();
  Sha1Update(hSha1,(unsigned char*)buf,strlen(buf));
  Sha1Final(md2,hSha1);
  CloseSha1(hSha1);
  printf("\n"); for (i=0;i<20;i++) { printf ("%02x",md2[i]); } printf("\n\n");
  
  memset(buf, 0, 200);
  memcpy(buf, md1, 20);
  strcat(buf, md2);
  for (i=0;i<24;i++) {
    key[i]=buf[i+3];
  }
  return 1;
}

int main(int argc, char* argv[]) {
  int i;
  unsigned char key[24];
  char buf[80];
  
  if (argc > 1) {
    strcpy(buf, argv[1]);
  } else {
    printf("Enter a string: ");
    scanf("%s", buf);
  }
  DES3KeyGen(buf, key);

  printf("\n");
  for (i=0;i<24;i++) {
    printf ("%02x",key[i]);
  }
  printf("\n");
  
}