AES encryption in Java, equivalent of Crypt ( Encrypter.php class ) on Laravel (PHP)

AesEncryptDecrypt.java

import android.util.Base64;
import android.util.Log;
import com.google.gson.Gson;
import org.apache.commons.codec.binary.Hex;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.security.Key;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class AesEncryptDecrypt
{
    public static String encrypt(byte[] keyValue, String plaintext) throws Exception {
        Key key = new SecretKeySpec(keyValue, "AES");
        //serialize
        String serializedPlaintext = "s:" + plaintext.getBytes().length + ":\"" + plaintext + "\";";
        byte[] plaintextBytes = serializedPlaintext.getBytes("UTF-8");

        Cipher c = Cipher.getInstance("AES/CBC/PKCS5Padding");
        c.init(Cipher.ENCRYPT_MODE, key);
        byte[] iv = c.getIV();
        byte[] encVal = c.doFinal(plaintextBytes);
        String encryptedData = Base64.encodeToString(encVal, Base64.NO_WRAP);

        SecretKeySpec macKey = new SecretKeySpec(keyValue, "HmacSHA256");
        Mac hmacSha256 = Mac.getInstance("HmacSHA256");
        hmacSha256.init(macKey);
        hmacSha256.update(Base64.encode(iv, Base64.NO_WRAP));
        byte[] calcMac = hmacSha256.doFinal(encryptedData.getBytes("UTF-8"));
        String mac = new String(Hex.encodeHex(calcMac));
        //Log.d("MAC",mac);

        AesEncryptionData aesData = new AesEncryptionData(
                Base64.encodeToString(iv, Base64.NO_WRAP),
                encryptedData,
                mac);

        String aesDataJson = new Gson().toJson(aesData);

        return Base64.encodeToString(aesDataJson.getBytes("UTF-8"), Base64.DEFAULT);
    }

    public static String decrypt(byte[] keyValue, String ivValue, String encryptedData, String macValue) throws Exception {
        Key key = new SecretKeySpec(keyValue, "AES");
        byte[] iv = Base64.decode(ivValue.getBytes("UTF-8"), Base64.DEFAULT);
        byte[] decodedValue = Base64.decode(encryptedData.getBytes("UTF-8"), Base64.DEFAULT);

        SecretKeySpec macKey = new SecretKeySpec(keyValue, "HmacSHA256");
        Mac hmacSha256 = Mac.getInstance("HmacSHA256");
        hmacSha256.init(macKey);
        hmacSha256.update(ivValue.getBytes("UTF-8"));
        byte[] calcMac = hmacSha256.doFinal(encryptedData.getBytes("UTF-8"));
        byte[] mac = Hex.decodeHex(macValue.toCharArray());
        if (!Arrays.equals(calcMac, mac))
            return "MAC mismatch";

        Cipher c = Cipher.getInstance("AES/CBC/PKCS7Padding"); // or PKCS5Padding
        c.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
        byte[] decValue = c.doFinal(decodedValue);

        int firstQuoteIndex = 0;
        while (decValue[firstQuoteIndex] != (byte) '"') firstQuoteIndex++;
        return new String(Arrays.copyOfRange(decValue, firstQuoteIndex + 1, decValue.length - 2));
    }

}

AesEncryptionData.java

/**
 * Created by Kushtrim on 06.10.2015.
 */
public class AesEncryptionData {
    public String iv;
    public String value;
    public String mac;

    public AesEncryptionData(String iv, String value, String mac) {
        this.iv = iv;
        this.value = value;
        this.mac = mac;
    }

}

how do you use it? what is iv, value and mac

@nasznjoka
When you encrypt a text with Crypt in Laravel, you get a base64 string.
To decrypt,decode that base64, and you get a JSON object like the AesEncryptionData class above. Then proceed with the decrypt method.

Could you please give an example in use? How to use the App_Key from Laravel in this class?
How can I decrypt a string from Laravle with this?

If I want to use decrypt with sample word in java and Println the result..
how do i know byte[] keyValue, String ivValue, String encryptedData, String macValue for method decrypt?

@madita did you find a way to do that? please share.

Hi @madita , @mr648 .
I checked the code from my old project. Here's a further example:

  public static String getDecryptedString(String encryptedString) {
        String aesDataString = new String(Base64.decode(encryptedString.getBytes(), Base64.DEFAULT));

        AesEncryptedData aesEncryptedData = new Gson().fromJson(aesDataString, AesEncryptedData.class);

        String decrypted = null;
        try {
            decrypted = decrypt(
                    SECRET_KEY.getBytes("UTF-8"),
                    aesEncryptedData.iv,
                    aesEncryptedData.value,
                    aesEncryptedData.mac
            );
        } catch (Exception e) {
            e.printStackTrace();
        }
        return decrypted;
    }

how to call method decrypt?

Do we need to pass IvParameterSpec in c.init(Cipher.ENCRYPT_MODE, key); as last parameter?

Can get that for the jquery version or PHP version?