解码代码找到了！

网上流传的绿坝关键字解码程序源代码 gddec.c 文件终于被找到了！

庆祝一下 这个电脑没有VC 找个有的编译一下 哈哈 绿坝 "不限制言论自由" ? 你们看着吧

下面是源代码

gddec.c


// gddec.c -- Decode encrypted data files from Green Dam Chinese censorware.
// By J. Alex Halderman (jhalderm@eecs.umich.edu) and Scott Wolchok (swolchok@umich.edu)
// June 10, 2009

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

void dec(unsigned char *buf, int len, unsigned char *out)
{
  int i;
  for (i=0; i < len; i += 2 ) {
    unsigned int r = (buf[i] << 4) | (buf[i+1] & 0xF);
    out[i/2] = ~r ^ (r ^ (unsigned char)~r) & 0x33;
  }
  out[i/2] = '\0';
}

void decfile(char *file)
{
  FILE *f = fopen(file, "rb");
  char buf[512], out[512];
  while (fgets(buf, sizeof(buf), f) > 0) {
    //printf("%s\n", buf);
    memset(out, 0, sizeof(out));
    dec(buf, strlen(buf), out);
    printf("%s\n", out);
  }
  fclose(f);
}

int main(int argc, char *argv[])
{
  if (argc < 2) {
    fprintf(stderr, "usage: dec [file]\n");
    return -1;
  }

  int i;
  for (i=1; i < argc; i++)
    decfile(argv[i]);
  return 0;
}



代码来自网络 本人不承担任何责任