Exception:javax.crypto.BadPaddingException: Given final block not properly padded. Such issues can arise if a bad key is used during decryption.
偶发性异常：没登录时用AES/CBC/PKCS7Padding，登录后用AES/CBC/PKCS5Padding；
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.AlgorithmParameterSpec;
/**
- @Description TODO
- @Author jizhuolin
- @Date 2018/9/28
/
public class WxMiniappUtils {
/解密用户手机号算法
@param sessionkey 小程序登录sessionKey
@param iv 向量
@param encryptedData
@return
@throws NoSuchPaddingException
@throws NoSuchAlgorithmException
@throws InvalidAlgorithmParameterException
@throws InvalidKeyException
@throws BadPaddingException
-
@throws IllegalBlockSizeException
*/
public static byte[] decrypt(byte[] sessionkey, byte[] iv, byte[] encryptedData)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidAlgorithmParameterException,
InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
AlgorithmParameterSpec ivSpec = new IvParameterSpec(iv);byte[] data = null;
try {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
SecretKeySpec keySpec = new SecretKeySpec(sessionkey, "AES");
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
data = cipher.doFinal(encryptedData);
}catch (Exception e){
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
SecretKeySpec keySpec = new SecretKeySpec(sessionkey, "AES");
cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);
data = cipher.doFinal(encryptedData);
}return data;
}
}
