Question

我在Linux内核中使用Crypto API（MD5）。它“正在工作”，但我不确定它是否正常工作。作为测试，我使用此字符串作为示例：

Here is a completely different setup that should produce a different fingerprint. Let's see.

生成的哈希是

534d78034b774b6266f2189576f8c6e3

似乎合法。因此，我查看在线网站http://www.sha1-online.com/以查看其结果

07a90df929448eb67b00a6e01a202519

显然是错的。这是我的代码：

static int fingerprint(void)
{
  struct scatterlist sg;
  struct crypto_hash *tfm;
  struct hash_desc desc;
  unsigned char * output;
  unsigned char * buf;
  int i;

  output = kmalloc(sizeof(*output) * 16, GFP_KERNEL);
  memset(output, 0x00, 16);

  buf = "Here is a completely different setup that should produce a different fingerprint. Let's see.";

  tfm = crypto_alloc_hash("md5", 0, CRYPTO_ALG_ASYNC);

  desc.tfm = tfm;
  desc.flags = 0;

  sg_init_one(&sg, buf, 92);
  crypto_hash_init(&desc);

  crypto_hash_update(&desc, &sg, 92);
  crypto_hash_final(&desc, output);

  for(i = 0; i < 16; i++)
  {
    printk("%02x", output[i]);
  }

  printk("\n"); 
  return 0;
}

这段代码是否正确？它有任何问题（明显或微妙的）吗？

在Linux中正确使用Crypto API

0 个答案: