JAVA加密算法系列-AesCBC

package ***;import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;/**
* AES 是一種可逆加密算法，對用戶的敏感信息加密處理
* 對原始數據進行AES加密后，在進行Base64編碼轉化；
* 正確
*/
public class AesCBC {
/*已確認
* 加密用的Key 可以用26個字母和數字組成
* 此處使用AES-128-CBC加密模式，key需要為16位。
*/private static String sKey="1234567890123456";private static String ivParameter="1234567890123456";private static AesCBC instance=null;//private static private AesCBC(){}public static AesCBC getInstance(){if (instance==null)instance= new AesCBC();return instance;}// 加密public String encrypt(String sSrc, String encodingFormat, String sKey, String ivParameter) throws Exception {Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");byte[] raw = sKey.getBytes();SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());//使用CBC模式，需要一個向量iv，可增加加密算法的強度
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);byte[] encrypted = cipher.doFinal(sSrc.getBytes(encodingFormat));return new BASE64Encoder().encode(encrypted);//此處使用BASE64做轉碼。
}// 解密public String decrypt(String sSrc, String encodingFormat, String sKey, String ivParameter) throws Exception {try {byte[] raw = sKey.getBytes("ASCII");SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密byte[] original = cipher.doFinal(encrypted1);String originalString = new String(original,encodingFormat);return originalString;} catch (Exception ex) {return null;}
}public static void main(String[] args) throws Exception {// 需要加密的字串String cSrc = "123456";System.out.println("加密前的字串是："+cSrc);// 加密String enString = AesCBC.getInstance().encrypt(cSrc,"utf-8",sKey,ivParameter);System.out.println("加密后的字串是："+ enString);System.out.println("1jdzWuniG6UMtoa3T6uNLA==".equals(enString));// 解密String DeString = AesCBC.getInstance().decrypt(enString,"utf-8",sKey,ivParameter);System.out.println("解密后的字串是：" + DeString);}
}

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