在 node 中加密并在 java 中解密

Question

我有一个 Java 加密代码。我正在尝试将加密部分移植到节点。基本上，node 会使用 crypto 模块进行加密，然后 Java 会进行解密。

这是我在 Java 中进行加密的方法：

protected static String encrypt(String plaintext) {
    final byte[] KEY = {
            0x6d, 0x79, 0x56, 0x65, 0x72, 0x79, 0x54, 0x6f, 0x70,
            0x53, 0x65, 0x63, 0x72, 0x65, 0x74, 0x4b
    };

    try {
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        final SecretKeySpec secretKey = new SecretKeySpec(KEY, "AES");
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        final String encryptedString = Base64.encodeToString(
            cipher.doFinal(plaintext.getBytes()), Base64.DEFAULT);

        return encryptedString;
    } catch (Exception e) {
        return null;
    }
}

这是我在节点中进行加密的方法：

var crypto = require('crypto'),
    key = new Buffer('6d7956657279546f705365637265744b', 'hex'),
    cipher = crypto.createCipher('aes-128-ecb', key),
    chunks = [];

cipher.setAutoPadding(true);
chunks.push(cipher.update(
    new Buffer(JSON.stringify({someKey: "someValue"}), 'utf8'),
    null, 'base64'));
chunks.push(cipher.final('base64'));

var encryptedString = chunks.join('');

在 Java 中，我得到字符串 T4RlJo5ENV8h1uvmOHzz1KjyXzBoBuqVLSTHsPppljA=。这得到正确解密。但是，在节点中，我得到al084hEpTK7gOYGQRSGxF+WWKvNYhT4SC7MukrzHieM=，这显然是不同的，因此它不会被正确解密。

我试图寻找和我有同样问题的人，this github issue 是我能找到的最接近的问题。正如该问题中所建议的，我尝试像这样运行 openssl：

$ echo -e '{"someKey": "someValue"}' | openssl enc -a -e -aes-128-ecb -K "6d7956657279546f705365637265744b"
T4RlJo5ENV8h1uvmOHzz1MY2bhoFRHZ+ClxsV24l2BU=

我得到的结果和java产生的结果很接近，但还是不一样：

T4RlJo5ENV8h1uvmOHzz1MY2bhoFRHZ+ClxsV24l2BU=  // openssl
T4RlJo5ENV8h1uvmOHzz1KjyXzBoBuqVLSTHsPppljA=  // java
al084hEpTK7gOYGQRSGxF+WWKvNYhT4SC7MukrzHieM=  // node

这让我想到了一个问题，如何让节点输出与我的 java 代码相同的加密字符串？我只能在 node 中更改我的代码，而不能在 java 中更改。

Answer 1

我以为我从节点和 java 端发布了一个完整的 CBC 示例（256 而不是 128）： 如果您收到 java.security.InvalidKeyException，则必须安装 Java Cryptography Extension (JCE) 无限强度管辖策略文件：

Java 6 link Java 7 link Java 8 link

Java 加密和解密。

    import java.security.MessageDigest;
    import javax.crypto.spec.SecretKeySpec;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.Cipher;
    import java.util.Base64;
    import javax.xml.bind.DatatypeConverter;

    public class AESExample {
        private static byte[] iv = "0000000000000000".getBytes();
        private static String decrypt(String encrypted, String seed)
                throws Exception {
            byte[] keyb = seed.getBytes("utf-8");
            MessageDigest md = MessageDigest.getInstance("SHA-256");
            byte[] thedigest = md.digest(keyb);
            SecretKeySpec skey = new SecretKeySpec(thedigest, "AES");
            Cipher dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            dcipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(seed.getBytes("UTF-8"), "AES"), new IvParameterSpec(iv));
            byte[] clearbyte = dcipher.doFinal(DatatypeConverter
                    .parseHexBinary(encrypted));
            return new String(clearbyte);
        }
        public static String encrypt(String content, String key) throws Exception {
            byte[] input = content.getBytes("utf-8");
            MessageDigest md = MessageDigest.getInstance("SHA-256");
            byte[] thedigest = md.digest(key.getBytes("utf-8"));
            SecretKeySpec skc = new SecretKeySpec(thedigest, "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes("UTF-8"), "AES"), new IvParameterSpec(iv));
            byte[] cipherText = new byte[cipher.getOutputSize(input.length)];
            int ctLength = cipher.update(input, 0, input.length, cipherText, 0);
            ctLength += cipher.doFinal(cipherText, ctLength);
            return DatatypeConverter.printHexBinary(cipherText);
        }

public static String encrypt128(String content, String key) throws Exception {
        byte[] input = content.getBytes("utf-8");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(DatatypeConverter.parseHexBinary(key), "AES"), new IvParameterSpec(iv));
         byte[] encrypted = cipher.doFinal(content.getBytes("UTF-8"));
        return DatatypeConverter.printHexBinary(encrypted);
    }

        public static void main(String[] args) throws Exception {
            String data = "Here is my string";
            String key = "1234567891123456";
            String cipher = AESExample.encrypt(data, key);
            String decipher = AESExample.decrypt(cipher, key);
            System.out.println(cipher);
            System.out.println(decipher);
            System.out.println(AESExample.encrypt(data, "1234567891123456"));
            System.out.println(AESExample.encrypt128(data, "d7900701209d3fbac4e214dfeb5f230f"));
        }
    }

以下两个方向节点：

    var crypto = require('crypto');
        var iv = new Buffer('0000000000000000');
        // reference to converting between buffers http://nodejs.org/api/buffer.html#buffer_new_buffer_str_encoding
        // reference node crypto api http://nodejs.org/api/crypto.html#crypto_crypto_createcipheriv_algorithm_key_iv
        // reference to ECB vs CBC cipher methods http://crypto.stackexchange.com/questions/225/should-i-use-ecb-or-cbc-encryption-mode-for-my-block-cipher

        var encrypt = function(data, key) {
          var decodeKey = crypto.createHash('sha256').update(key, 'utf-8').digest();
          var cipher = crypto.createCipheriv('aes-256-cbc', decodeKey, iv);
          return cipher.update(data, 'utf8', 'hex') + cipher.final('hex');
        };

        var decrypt = function(data, key) {
          var encodeKey = crypto.createHash('sha256').update(key, 'utf-8').digest();
          var cipher = crypto.createDecipheriv('aes-256-cbc', encodeKey, iv);
          return cipher.update(data, 'hex', 'utf8') + cipher.final('utf8');
        };

       var decrypt128 = function(data, key) {

          var encodeKey = crypto.createHash('sha256').update(key, 'utf-8').digest();
         var cipher = crypto.createDecipheriv('aes-128-cbc', new Buffer(key, 'hex'),
    new Buffer(
      iv));
  return cipher.update(data, 'hex', 'utf8') + cipher.final('utf8');
};
        var data = 'Here is my string'
        var key = '1234567891123456';
        var cipher = encrypt(data, key);
        var decipher = decrypt(cipher, key);
        console.log(cipher);
        console.log(decipher);
        // the string below was generated from the "main" in the java side
        console.log(decrypt(
          "79D78BEFC06827B118A2ABC6BD9D544E83F92930144432F22A6909EF18E0FDD1", key));
        console.log(decrypt128(
  "3EB7CF373E108ACA93E85D170C000938A6B3DCCED53A4BFC0F5A18B7DDC02499",
  "d7900701209d3fbac4e214dfeb5f230f"));

Answer 2

最后，我找到了解决问题的方法。感谢this 家伙。解决方案的关键是初始化向量。引用要点：

// ECB模式不需要IV，所以保持这样就可以了。

解决方案如下所示：

var crypto = require('crypto'),
    iv = new Buffer(''),
    key = new Buffer('6d7956657279546f705365637265744b', 'hex'),
    cipher = cypto.createCipheriv('aes-128-ecb', key, iv),
    chunks = [];

chunks.push(cipher.update(
    new Buffer(JSON.stringify({someKey: "someValue"}), 'utf8'),
    'buffer', 'base64'));
chunks.push(cipher.final('base64'));
var encryptedString = chunks.join('');

Answer 3

在 Node.Js 中加密和在 Java 中解密的工作示例：

加密：

var crypto = require('crypto')
var cipher = crypto.createCipher('aes-128-ecb','somepassword')
var text = "the big brown fox jumped over the fence"
var crypted = cipher.update(text,'utf-8','hex')
crypted += cipher.final('hex')
//now crypted contains the hex representation of the ciphertext

解密：

private static String decrypt(String seed, String encrypted) throws Exception {
    byte[] keyb = seed.getBytes("UTF-8");
    MessageDigest md = MessageDigest.getInstance("MD5");
    byte[] thedigest = md.digest(keyb);
    SecretKeySpec skey = new SecretKeySpec(thedigest, "AES");
    Cipher dcipher = Cipher.getInstance("AES");
    dcipher.init(Cipher.DECRYPT_MODE, skey);

    byte[] clearbyte = dcipher.doFinal(toByte(encrypted));
    return new String(clearbyte);
}

private static byte[] toByte(String hexString) {
    int len = hexString.length()/2;
    byte[] result = new byte[len];
    for (int i = 0; i < len; i++) {
        result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2), 16).byteValue();
    }
    return result;
}

Answer 4

重要提示：Matthew Payne 的回答只适用于“在节点中加密并在 java 中解密”而不适用于两者，所以如果你想要两者都不要只是复制和粘贴