Mauvais algorithme: l'algorithme AES ou Rijndael nécessaire

Je suis nouveau sur JAVA. Je vais créer un système de sécurité pour mon projet. Cependant, j'ai rencontré un problème. Eclipse toujours souligne que "java.de sécurité.InvalidKeyException: Mauvais algorithme: l'algorithme AES ou Rijndael nécessaire". Je vais enregistrer la clé de cryptage de la base de données. J'ai vérifié que la clé est correcte. Le seul problème est que je ne peut pas déchiffrer le texte chiffré. Quelqu'un peut me dire quel est le problème?
En fait, j'ai cherché des solutions, mais le problème n'est pas encore résolu.
S'il vous plaît aider moi. Merci beaucoup!

import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
public class AES {
public static void main(String[] args) throws Exception {
String test = "HIHI";
String tmp = null;
SecretKey tempKey1 = generateKey();
saveKey(tempKey1);
SecretKey tempKey2 = loadKey();
tmp = encrypt(test, tempKey1);
String printString = decrypt(tmp, tempKey2);
System.out.println(printString);
}
public static SecretKey generateKey() throws NoSuchAlgorithmException {
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
keyGenerator.init(128);
SecretKey key = keyGenerator.generateKey();
return key;
}
public static void saveKey(SecretKey key) throws IOException {
String stringKey = Base64.encodeBase64String(key.getEncoded());
System.out.println("stringKey: " + stringKey);
try {
final PreparedStatement pstmt;
//Register the JDBC driver
//for MySQL.
Class.forName("com.mysql.jdbc.Driver");
//Define URL of database
//server for
//database named JunkDB on
//the localhost
//with the default port
//number 3306.
String url = "jdbc:mysql://127.0.0.1:3306/fyp";
//Get a connection to the
//database for a
//user named auser with the
//password
//drowssap, which is
//password spelled
//backwards.
Connection con = DriverManager.getConnection(url, "user", "user");
pstmt = con.prepareStatement("insert into compfyp values (?)");
pstmt.setString(1, stringKey);
pstmt.executeUpdate();
pstmt.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}//end catch
}
public static SecretKey loadKey() throws IOException {
String stringKey = null;
try {
Statement stmt;
ResultSet rs;
//Register the JDBC driver for MySQL
Class.forName("com.mysql.jdbc.Driver");
//Define URL of database server for database named comp2220
String url = "jdbc:mysql://127.0.0.1:3306/fyp";
//Get a connection to the database for a user named user with the
//password userpassword, which is password spelled backwards
Connection con = DriverManager.getConnection(url, "user", "user");
//Get a Statement object
stmt = con.createStatement();
//Get another statement object initialized as shown
stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
//Query the database, storing the result in an object of type
//ResultSet
rs = stmt.executeQuery("SELECT * from compfyp");
//Use the methods of class ResultSet in a loop to display all of
//the data in the database.
while (rs.next()) {
stringKey = rs.getString("encryptionkey");
}//end while loop
con.close();
} catch (Exception e) {
e.printStackTrace();
}
byte[] encodedKey = Base64.decodeBase64(stringKey);
SecretKey trueKey = new SecretKeySpec(encodedKey, 0, encodedKey.length,
"AES/ECB/PKCS5Padding");
System.out.println("after encode & decode secret_key:"
+ Base64.encodeBase64String(trueKey.getEncoded()));
return trueKey;
}
public static String encrypt(String plaintext, SecretKey encryptionKey)
throws Exception {
IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, encryptionKey, iv);
byte[] encryptData = cipher.doFinal(plaintext.getBytes());
return encryptData.toString();
}
public static String decrypt(String ciphertext, SecretKey encryptionKey)
throws Exception {
IvParameterSpec iv = new IvParameterSpec("0102030405060708".getBytes());
SecretKeySpec spec = new SecretKeySpec(encryptionKey.getEncoded(),
"AES/CBC/PKCS5Padding");
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, spec, iv);
byte[] encryptData = ciphertext.getBytes();
;
byte[] original = cipher.doFinal(encryptData);
return new String(original);
}

}

OriginalL'auteur Justin Yum | 2014-03-12