Android String Decrypt decrypt(String keyStr, String encryptData)

Description

decrypt

Declaration

public static String decrypt(String keyStr, String encryptData) 

Method Source Code

//package com.java2s;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

public class Main {
    private static final String AESTYPE = "AES/ECB/PKCS5Padding";

    public static String decrypt(String keyStr, String encryptData) {
        byte[] decrypt = null;
        try {/*from ww w.  j  a  va 2  s.co  m*/
            Key key = generateKey(keyStr);
            Cipher cipher = Cipher.getInstance(AESTYPE);
            cipher.init(Cipher.DECRYPT_MODE, key);
            decrypt = cipher.doFinal(Base64.decodeBase64(encryptData));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new String(decrypt).trim();
    }

    private static Key generateKey(String key) throws Exception {
        try {
            SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
            return keySpec;
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }

    }
}

Related

1. decrypt(String seed, String encrypted)
2. decrypt(String old)