使用hutool对称价目AES

Z时代
2024-01-10
分类：综合
public class AESHelper {
/**
     * AES加密
*
     * @param content 待加密的内容
* @param encryptKey 密钥
* @param length 密钥长度
* @return 加密后code
     */
public static String encryptAes(String content, String encryptKey, KeyLength length) {
//设置密钥长度
String aesKey = getAesKey(encryptKey, length.value);
//构建  随机生成密钥
//AES aes = SecureUtil.aes(SecureUtil.generateKey(SymmetricAlgorithm.AES.getValue()).getEncoded());
        //构建
AES aes = new AES(Mode.ECB, Padding.PKCS5Padding, aesKey.getBytes());
//加密
String encryptBase64 = aes.encryptBase64(content);
        return encryptBase64;
    }
/**
     * AES解密
*
     * @param content 待解密的内容
* @param encryptKey 密钥
* @param length 密钥长度
* @return 解密后code
     */
public static String decryptAes(String content, String encryptKey, KeyLength length) {
//设置密钥长度
String aesKey = getAesKey(encryptKey, length.value);
//构建
AES aes = new AES(Mode.ECB, Padding.PKCS5Padding, aesKey.getBytes());
//解密
byte[] decrypt = aes.decrypt(content);
//解密字符串
String res = new String(decrypt);
        return res;
    }
/*
    *
    * 获取指定长度密钥
    * @param key 密钥
    * @param length 密钥长度
    * */
private static String getAesKey(String key,int length)
    {
        if (key.isEmpty())
        {
            throw new NullPointerException("Aes密钥不能为空");
        }
        if (key.length() < length)
        {
            key = padRight(key, length, "0");
        }
        if (key.length() > length)
        {
            key = key.substring(0, length);
        }
        return key;
    }
/*
    *
    * 补位
    *
    * */
private static String padRight(String src, int len, char ch) {
        int diff = len - src.length();
        if (diff <= 0) {
            return src;
        }
        char[] charr = new char[len];
        System.arraycopy(src.toCharArray(), 0, charr, diff, src.length());
        for (int i = 0; i < diff; i++) {
            charr[i] = ch;
        }
        return new String(charr);
    }
/*
    * 密钥长度
    *
    * */
public enum KeyLength{
Lentth16(16),
Lentth24(24),
Lentth32(32);
        private final int value;
        private KeyLength(int value) {
            this.value = value;
        }
        public KeyLength valueOf(int value) {
            switch (value) {
                case 16:
                    return KeyLength.Lentth16;
                case 24:
                    return KeyLength.Lentth24;
                case 32:
                    return KeyLength.Lentth32;
                default:
                    return null;
            }
        }
    }
}