解决cryptoJS.AES默认参数加密,java无法解密的问题

前端直接默认参数加密的，没有传iv salt等

const cryptoJS = require("crypto-js");

const encryptedValue = cryptoJS.AES.encrypt(value, secret)

后端代码

前端默认参数加密，后端解密

java 复制代码

 public static byte[][] GenerateKeyAndIV(int keyLength, int ivLength, int iterations, byte[] salt, byte[] password, MessageDigest md) {

        int digestLength = md.getDigestLength();

        int requiredLength = (keyLength + ivLength + digestLength - 1) / digestLength * digestLength;

        byte[] generatedData = new byte[requiredLength];

        int generatedLength = 0;

        try {

            md.reset();

// Repeat process until sufficient data has been generated

            while (generatedLength < keyLength + ivLength) {

// Digest data (last digest if available, password data, salt if available)

                if (generatedLength > 0) {
                    md.update(generatedData, generatedLength - digestLength, digestLength);
                }

                md.update(password);

                if (salt != null) {
                    md.update(salt, 0, 8);
                }

                md.digest(generatedData, generatedLength, digestLength);

// additional rounds

                for (int i = 1; i < iterations; i++) {

                    md.update(generatedData, generatedLength, digestLength);

                    md.digest(generatedData, generatedLength, digestLength);

                }

                generatedLength += digestLength;

            }

// Copy key and IV into separate byte arrays

            byte[][] result = new byte[2][];

            result[0] = Arrays.copyOfRange(generatedData, 0, keyLength);

            if (ivLength > 0) {
                result[1] = Arrays.copyOfRange(generatedData, keyLength, keyLength + ivLength);
            }

            return result;

        } catch (DigestException e) {

            throw new RuntimeException(e);

        } finally {

// Clean out temporary data

            Arrays.fill(generatedData, (byte) 0);

        }

    }




//解密方法
 public static byte[] aesDecrypt(String encryptedText, String secret) {
        try {
            byte[] cipherData = cn.hutool.core.codec.Base64.decode(encryptedText);

            byte[] saltData = Arrays.copyOfRange(cipherData, 8, 16);

            MessageDigest md5 = MessageDigest.getInstance("MD5");

            final byte[][] keyAndIV = GenerateKeyAndIV(32, 16, 1, saltData, secret.getBytes(StandardCharsets.UTF_8), md5);

            SecretKeySpec key = new SecretKeySpec(keyAndIV[0], "AES");

            IvParameterSpec iv = new IvParameterSpec(keyAndIV[1]);

            byte[] encrypted = Arrays.copyOfRange(cipherData, 16, cipherData.length);

            Cipher aesCBC = Cipher.getInstance("AES/CBC/PKCS5Padding");

            aesCBC.init(Cipher.DECRYPT_MODE, key, iv);
            return aesCBC.doFinal(encrypted);
        } catch (Exception e) {
            log.error("aesDecrypt errorencryptedText" + e.getMessage(), e);
            return null;
        }
    }

后端加密

java 复制代码

 public static byte[] aesEncrypt(String datastr, String secret) {
        try {
            byte[] input = datastr.getBytes();
            // 以下两个变量不可修改，否则java加密的，node无法解密
            byte[] saltData = "DFބf$t:".getBytes();
            byte[] preData = "Salted__".getBytes();
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            final byte[][] keyAndIV = GenerateKeyAndIV(32, 16, 1, saltData, secret.getBytes(StandardCharsets.UTF_8), md5);

            SecretKeySpec key = new SecretKeySpec(keyAndIV[0], "AES");

            IvParameterSpec iv = new IvParameterSpec(keyAndIV[1]);
            Cipher aesCBC = Cipher.getInstance("AES/CBC/PKCS5Padding");

            aesCBC.init(Cipher.ENCRYPT_MODE, key, iv);

            byte[] encrypt = aesCBC.doFinal(input);
            byte[] encryptedData = addBytes(saltData, encrypt);
            return Base64.getEncoder().encode((addBytes(preData, encryptedData)));
        } catch (Exception e) {
            log.error("aesEncrypt error.param={}", datastr, e);
            return null;
        }
    }


    public static byte[] addBytes(byte[] data1, byte[] data2) {

        byte[] data3 = new byte[data1.length + data2.length];

        System.arraycopy(data1, 0, data3, 0, data1.length);

        System.arraycopy(data2, 0, data3, data1.length, data2.length);

        return data3;

    }