移动开发---AES加密解密

aes加密解密

 

import android.util.Base64;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;


/**
 * Date: 2019/4/1
 * autor:Wayne
 */
public class AESUtil {
    private static String key = "123456789";

    /**
     *      * 加密
     *      * @param content
     *      * @param strKey
     *      * @return
     *      * @throws Exception
     *     
     */
    public static byte[] encrypt(String content, String strKey) throws Exception {
        SecretKeySpec skeySpec = getKey(strKey);
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
        byte[] encrypted = cipher.doFinal(content.getBytes());
        return encrypted;
    }

    /**
     *      * 解密
     *      * @param strKey
     *      * @param content
     *      * @return
     *      * @throws Exception
     *     
     */
    public static String decrypt(byte[] content, String strKey) throws Exception {
        SecretKeySpec skeySpec = getKey(strKey);
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        IvParameterSpec iv = new IvParameterSpec("1234567890123456".getBytes());
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        byte[] original = cipher.doFinal(content);
        String originalString = new String(original);
        return originalString;
    }

    private static SecretKeySpec getKey(String strKey) throws Exception {
        byte[] arrBTmp = strKey.getBytes();
        // 创建一个空的16位字节数组（默认值为0）
        byte[] arrB = new byte[16];

        for (int i = 0; i < arrBTmp.length && i < arrB.length; i++) {
            arrB[i] = arrBTmp[i];
        }

        SecretKeySpec skeySpec = new SecretKeySpec(arrB, "AES");

        return skeySpec;
    }

    /**
     *      * base 64 encode
     *      * @param bytes 待编码的byte[]
     *      * @return 编码后的base 64 code
     *     
     */
    public static String base64Encode(byte[] bytes) {
        return Base64.encodeToString(bytes,Base64.DEFAULT);
    }

    /**
     *      * base 64 decode
     *      * @param base64Code 待解码的base 64 code
     *      * @return 解码后的byte[]
     *      * @throws Exception
     *     
     */
    public static byte[] base64Decode(String base64Code) throws Exception {
        return base64Code.isEmpty() ? null : Base64.decode(base64Code,Base64.DEFAULT);
    }

    /**
     *      * AES加密为base 64 code
     *      * @param content 待加密的内容
     *      * @param encryptKey 加密密钥
     *      * @return 加密后的base 64 code
     *      * @throws Exception  //加密传String类型，返回String类型
     *     
     */
    public static String aesEncrypt(String content, String encryptKey) throws Exception {
        return base64Encode(encrypt(content, encryptKey));
    }

    /**
     *      * 将base 64 code AES解密
     *      * @param encryptStr 待解密的base 64 code
     *      * @param decryptKey 解密密钥
     *      * @return 解密后的string   //解密传String类型，返回String类型
     *      * @throws Exception
     *     
     */
    public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
        return encryptStr.isEmpty() ? null : decrypt(base64Decode(encryptStr), decryptKey);
    }

    public static void main(String[] args) throws Exception {
//        String encrypt = aesEncrypt("test", key);
//        System.out.println(encrypt);
        String decrypt = aesDecrypt("ii7wTRyDfeqtT9odaURoPA==", key);
        System.out.println(decrypt);
    }

}