移动开发---AES加密解密 - 好文

aes加密解密

package com.extremely.clson.amusive.constellations.utils; import
javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import
javax.crypto.spec.SecretKeySpec; import Decoder.BASE64Decoder; import
Decoder.BASE64Encoder; /** * 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 new BASE64Encoder().encode(bytes); } /** *
   * 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 : new BASE64Decoder().decodeBuffer(base64Code); } /** *    *
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); } }

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