256 但它似乎在 GAE 中不起作用。我已经下载了“Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files”,并且 local_policy.jar、US_export_policy.jar 存在于 C:\Program Files\Java\jdk1.6.0_29\jre\lib\security 位置。
这是代码:
import java.security.spec.KeySpec;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.*;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
public class AESEncrypter {
private static final byte[] SALT = {
(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32,
(byte) 0x56, (byte) 0x35, (byte) 0xE3, (byte) 0x03
};
private static final int ITERATION_COUNT = 65536;
private static final int KEY_LENGTH = 256;
private Cipher ecipher;
private Cipher dcipher;
AESEncrypter(String passPhrase) throws Exception {
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
KeySpec spec = new PBEKeySpec(passPhrase.toCharArray(), SALT, ITERATION_COUNT, KEY_LENGTH);
SecretKey tmp = factory.generateSecret(spec);
SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
ecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
ecipher.init(Cipher.ENCRYPT_MODE, secret);
dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
byte[] iv = ecipher.getParameters().getParameterSpec(IvParameterSpec.class).getIV();
dcipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(iv));
}
public String encrypt(String encrypt) throws Exception {
byte[] bytes = encrypt.getBytes("UTF8");
byte[] encrypted = encrypt(bytes);
return new Base64().encodeBase64String(encrypted);
}
public byte[] encrypt(byte[] plain) throws Exception {
return ecipher.doFinal(plain);
}
public String decrypt(String encrypt) throws Exception {
byte[] bytes = new Base64().decodeBase64(encrypt);
byte[] decrypted = decrypt(bytes);
return new String(decrypted, "UTF8");
}
public byte[] decrypt(byte[] encrypt) throws Exception {
return dcipher.doFinal(encrypt);
}
public static void main(String[] args) throws Exception {
String message = "MESSAGE";
String password = "PASSWORD";
AESEncrypter encrypter = new AESEncrypter(password);
String encrypted = encrypter.encrypt(message);
String decrypted = encrypter.decrypt(encrypted);
System.out.println("Encrypt(\"" + message + "\", \"" + password + "\") = \"" + encrypted + "\"");
System.out.println("Decrypt(\"" + encrypted + "\", \"" + password + "\") = \"" + decrypted + "\"");
}
}
如有任何帮助,我们将不胜感激 谢谢!!
最佳答案
您的异常肯定是由于缺少无限强度管辖文件引起的。
您已声明这些已下载并存储在您的 Java 6 JDK 中。我确保您也将副本存储在 JRE 安装的 lib/security
文件夹中(如果您有的话)。
确保您确切知道执行应用程序时正在调用哪个 java
命令。
关于java - GAE 中的 AES-256 实现,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12833826/