将Java中的加密代码转换为Ruby

Question

我一直在尝试将用于在Java中加密的代码转换为ruby，但是我无法完全做到这一点。我得到了不同的价值观。

   passphrase = passphrase + STATIC_KEY;
   byte[] key = passphrase.getBytes("UTF-8");

   MessageDigest sha = MessageDigest.getInstance("SHA-1");
   key = sha.digest(key);
   key = Arrays.copyOf(key, 16);
   SecretKey secretKey = new SecretKeySpec(key, "AES");

   Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
   IvParameterSpec initialisationVector = new IvParameterSpec(
           new byte[16]);
   cipher.init(Cipher.ENCRYPT_MODE, secretKey, initialisationVector);

   byte[] encryptedData = cipher.doFinal(plainText.getBytes("UTF-8"));

   return SimpleCrypto.toHex(encryptedData);

谁能让我知道，如何在红宝石中做到这一点。

  unencrypted = "passphrase"
  c = OpenSSL::Cipher.new("aes-128-cbc")
  c.encrypt
  c.key = Digest::SHA1.hexdigest('secret_key')[0...32]
  e = c.update(unencrypted)
  e << c.final
  return e

Answer 1

加密代码：

def aes(key,string)
  cipher = OpenSSL::Cipher::Cipher.new("aes-128-cbc")
  cipher.encrypt
  cipher.padding = 1
  cipher.key = hex_to_bin(Digest::SHA1.hexdigest('secret_key')[0..32])
  cipher_text = cipher.update(string)
  cipher_text << cipher.final
  return bin_to_hex(cipher_text).upcase
end

解密代码：

def aes_decrypt(key, encrypted)
  encrypted = hex_to_bin(encrypted.downcase)
  cipher = OpenSSL::Cipher::Cipher.new("aes-128-cbc")
  cipher.decrypt
  cipher.padding = 1
  cipher.key = hex_to_bin(Digest::SHA1.hexdigest('secret_key')[0..32])
  d = cipher.update(encrypted)
  d << cipher.final
end

hex_to_bin和bin_to_hex

def hex_to_bin(str)
  [str].pack "H*"
end

def bin_to_hex(s)
  s.unpack('C*').map{ |b| "%02X" % b }.join('')
end

在我的情况下，Java代码使用默认的初始化向量，因此我没有设置任何iv，此外，那里hex_to_bin缺少一块。因此，此后，所有程序都开始正常工作。

希望有人遇到此问题对您有所帮助。