JCH
Java Community | Help. Code. Learn.•6mo ago
Ferra

the decryption does not

any attempt to decrypt just causes an illegalArguementException 
package com.ferra;

import java.security.NoSuchAlgorithmException;
import java.util.Base64;    
import javax.crypto.Cipher;  
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;  
public class AES {  
    static Cipher cipher;  
    static SecretKey secretKey;
    
    public static void createSecretKey() {
        KeyGenerator keyGenerator;
        try {
            keyGenerator = KeyGenerator.getInstance("AES");
            keyGenerator.init(128); // block size is 128bits
            secretKey = keyGenerator.generateKey();
            cipher = Cipher.getInstance("AES");
        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
            globalErrorHandler errorHandler = new globalErrorHandler();
            errorHandler.uncaughtException(Thread.currentThread(), e);
}
}
public static SecretKey getSecretKey() {
    return secretKey;
}
public static void setSecretKey(String key) {
    byte[] keyByte = Base64.getDecoder().decode(key);
    secretKey = new SecretKeySpec(keyByte, 0, keyByte.length, "AES");

}
public static String encrypt(String plainText)
        throws Exception {
    byte[] plainTextByte = plainText.getBytes();
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    byte[] encryptedByte = cipher.doFinal(plainTextByte);
    Base64.Encoder encoder = Base64.getEncoder();
    String encryptedText = encoder.encodeToString(encryptedByte);
    return encryptedText;
}
    public static String decrypt(String encryptedText)
            throws Exception {
        Base64.Decoder decoder = Base64.getDecoder();
        byte[] encryptedTextByte = decoder.decode(encryptedText);
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] decryptedByte = cipher.doFinal(encryptedTextByte);
        String decryptedText = new String(decryptedByte);
        return decryptedText;
    }
}
package com.ferra;

import java.security.NoSuchAlgorithmException;
import java.util.Base64;    
import javax.crypto.Cipher;  
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;  
public class AES {  
    static Cipher cipher;  
    static SecretKey secretKey;
    
    public static void createSecretKey() {
        KeyGenerator keyGenerator;
        try {
            keyGenerator = KeyGenerator.getInstance("AES");
            keyGenerator.init(128); // block size is 128bits
            secretKey = keyGenerator.generateKey();
            cipher = Cipher.getInstance("AES");
        } catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
            globalErrorHandler errorHandler = new globalErrorHandler();
            errorHandler.uncaughtException(Thread.currentThread(), e);
}
}
public static SecretKey getSecretKey() {
    return secretKey;
}
public static void setSecretKey(String key) {
    byte[] keyByte = Base64.getDecoder().decode(key);
    secretKey = new SecretKeySpec(keyByte, 0, keyByte.length, "AES");

}
public static String encrypt(String plainText)
        throws Exception {
    byte[] plainTextByte = plainText.getBytes();
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    byte[] encryptedByte = cipher.doFinal(plainTextByte);
    Base64.Encoder encoder = Base64.getEncoder();
    String encryptedText = encoder.encodeToString(encryptedByte);
    return encryptedText;
}
    public static String decrypt(String encryptedText)
            throws Exception {
        Base64.Decoder decoder = Base64.getDecoder();
        byte[] encryptedTextByte = decoder.decode(encryptedText);
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] decryptedByte = cipher.doFinal(encryptedTextByte);
        String decryptedText = new String(decryptedByte);
        return decryptedText;
    }
}
5 Replies
JavaBot
JavaBot•6mo ago
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Ferra
FerraOP•6mo ago
oof
JavaBot
JavaBot•6mo ago
💤 Post marked as dormant
This post has been inactive for over 300 minutes, thus, it has been archived. If your question was not answered yet, feel free to re-open this post or create a new one. In case your post is not getting any attention, you can try to use /help ping. Warning: abusing this will result in moderative actions taken against you.
dan1st
dan1st•6mo ago
Can you include the stack trace?
JavaBot
JavaBot•6mo ago
💤 Post marked as dormant
This post has been inactive for over 300 minutes, thus, it has been archived. If your question was not answered yet, feel free to re-open this post or create a new one. In case your post is not getting any attention, you can try to use /help ping. Warning: abusing this will result in moderative actions taken against you.

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