ByteArrayGuard类随机输出“ERROR：MAC没有验证！ “消息到错误控制台。只有在启用客户端视图状态加密并且针对服务器运行多个客户端时才会发生这种情况。
所以，你必须改变类在Java服务器面临着引用...
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package com.sun.faces.renderkit;
import com.sun.faces.util.FacesLogger;
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.faces.FacesException;
/**
* <p>This utility class is to provide both encryption and
* decryption <code>Ciphers</code> to <code>ResponseStateManager</code>
* implementations wishing to provide encryption support.</p>
*
* <p>The algorithm used to encrypt byte array is AES with CBC.</p>
*
* <p>Original author Inderjeet Singh, J2EE Blue Prints Team. Modified to suit JSF
* needs.</p>
*/
public final class ByteArrayGuard {
// Log instance for this class
private static final Logger LOGGER = FacesLogger.RENDERKIT.getLogger();
private static final int MAC_LENGTH = 32;
private static final int KEY_LENGTH = 128;
private static final int IV_LENGTH = 16;
private static final String KEY_ALGORITHM = "AES";
private static final String CIPHER_CODE = "AES/CBC/PKCS5Padding";
private static final String MAC_CODE = "HmacSHA256";
private SecretKey sk;
// ------------------------------------------------------------ Constructors
public ByteArrayGuard() {
try {
setupKeyAndMac();
} catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
"Unexpected exception initializing encryption."
+ " No encryption will be performed.",
e);
}
System.err.println("ERROR: Initializing Ciphers");
}
}
// ---------------------------------------------------------- Public Methods
/**
* This method:
* Encrypts bytes using a cipher.
* Generates MAC for intialization vector of the cipher
* Generates MAC for encrypted data
* Returns a byte array consisting of the following concatenated together:
* |MAC for cnrypted Data | MAC for Init Vector | Encrypted Data |
* @param bytes The byte array to be encrypted.
* @return the encrypted byte array.
*/
public byte[] encrypt(byte[] bytes) {
byte[] securedata = null;
try {
// Generate IV
SecureRandom rand = new SecureRandom();
byte[] iv = new byte[16];
rand.nextBytes(iv);
IvParameterSpec ivspec = new IvParameterSpec(iv);
Cipher encryptCipher = Cipher.getInstance(CIPHER_CODE);
encryptCipher.init(Cipher.ENCRYPT_MODE, sk, ivspec);
Mac encryptMac = Mac.getInstance(MAC_CODE);
encryptMac.init(sk);
encryptMac.update(iv);
// encrypt the plaintext
byte[] encdata = encryptCipher.doFinal(bytes);
byte[] macBytes = encryptMac.doFinal(encdata);
byte[] tmp = concatBytes(macBytes, iv);
securedata = concatBytes(tmp, encdata);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
"Unexpected exception initializing encryption."
+ " No encryption will be performed.",
e);
}
return null;
}
return securedata;
}
/**
* This method decrypts the provided byte array.
* The decryption is only performed if the regenerated MAC
* is the same as the MAC for the received value.
* @param bytes Encrypted byte array to be decrypted.
* @return Decrypted byte array.
*/
public byte[] decrypt(byte[] bytes) {
try {
// Extract MAC
byte[] macBytes = new byte[MAC_LENGTH];
System.arraycopy(bytes, 0, macBytes, 0, macBytes.length);
// Extract IV
byte[] iv = new byte[IV_LENGTH];
System.arraycopy(bytes, macBytes.length, iv, 0, iv.length);
// Extract encrypted data
byte[] encdata = new byte[bytes.length - macBytes.length - iv.length];
System.arraycopy(bytes, macBytes.length + iv.length, encdata, 0, encdata.length);
IvParameterSpec ivspec = new IvParameterSpec(iv);
Cipher decryptCipher = Cipher.getInstance(CIPHER_CODE);
decryptCipher.init(Cipher.DECRYPT_MODE, sk, ivspec);
// verify MAC by regenerating it and comparing it with the received value
Mac decryptMac = Mac.getInstance(MAC_CODE);
decryptMac.init(sk);
decryptMac.update(iv);
decryptMac.update(encdata);
byte[] macBytesCalculated = decryptMac.doFinal();
if (Arrays.equals(macBytes, macBytesCalculated)) {
// continue only if the MAC was valid
// System.out.println("Valid MAC found!");
byte[] plaindata = decryptCipher.doFinal(encdata);
return plaindata;
} else {
System.err.println("ERROR: MAC did not verify!");
return null;
}
} catch (Exception e) {
System.err.println("ERROR: Decrypting:"+e.getCause());
return null; // Signal to JSF runtime
}
}
// --------------------------------------------------------- Private Methods
/**
* Generates secret key.
* Initializes MAC(s).
*/
private void setupKeyAndMac() {
try {
KeyGenerator kg = KeyGenerator.getInstance(KEY_ALGORITHM);
kg.init(KEY_LENGTH); // 256 if you're using the Unlimited Policy Files
sk = kg.generateKey();
} catch (Exception e) {
throw new FacesException(e);
}
}
/**
* This method concatenates two byte arrays
* @return a byte array of array1||array2
* @param array1 first byte array to be concatenated
* @param array2 second byte array to be concatenated
*/
private static byte[] concatBytes(byte[] array1, byte[] array2) {
byte[] cBytes = new byte[array1.length + array2.length];
try {
System.arraycopy(array1, 0, cBytes, 0, array1.length);
System.arraycopy(array2, 0, cBytes, array1.length, array2.length);
} catch(Exception e) {
throw new FacesException(e);
}
return cBytes;
}
}
并重新加载这个jar。 JSF_REFERENCE
根据重复，您需要配置客户端状态保存密钥。或者，如果您在服务器群集上运行，则需要确保使用粘性节点。 – BalusC