微信小程序java8 java7 java6 encryptedData 解密 异常处理

使用java8 java7  java6 解密微信小程序encryptedData可以回遇到一些错误

1.java.security.NoSuchAlgorithmException: Cannot find any provider supporting AES/CBC/PKCS7Padding

2.Java.security.NoSuchProviderException: no such provider: BC 

 

解决方法：

1.下载bcprov-jdk15on:jar，下再地址：http://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on/1.58

2.解密代码

static{
Security.addProvider(new BouncyCastleProvider());
}

// 被加密的数据
byte[] dataByte = Base64.decodeBase64(encryptedData);
// 加密秘钥
byte[] keyByte = Base64.decodeBase64(sessionkey);
// 偏移量
byte[] ivByte = Base64.decodeBase64(iv);
try {
// Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC");

Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding","BC");
SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
parameters.init(new IvParameterSpec(ivByte));
cipher.init(Cipher.DECRYPT_MODE, spec, parameters);// 初始化
byte[] resultByte = cipher.doFinal(dataByte);
if (null != resultByte && resultByte.length > 0) {
String result = new String(resultByte, "UTF-8");

}

 

result 就是解密的数据

 

 

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