Author: schultz
Date: Sat Jan 5 20:52:28 2019
New Revision: 1850508
URL: http://svn.apache.org/viewvc?rev=1850508&view=rev
Log:
Back-port EncryptInterceptor from Tomcat 9.0.x/trunk.
Added:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java
(contents, props changed)
- copied, changed from r1845157,
tomcat/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptorMBean.java
(props changed)
- copied unchanged from r1845157,
tomcat/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptorMBean.java
tomcat/tc8.5.x/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java
(contents, props changed)
- copied, changed from r1845157,
tomcat/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java
Modified:
tomcat/tc8.5.x/trunk/ (props changed)
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/LocalStrings.properties
tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml
tomcat/tc8.5.x/trunk/webapps/docs/config/cluster-interceptor.xml
Propchange: tomcat/tc8.5.x/trunk/
------------------------------------------------------------------------------
--- svn:mergeinfo (original)
+++ svn:mergeinfo Sat Jan 5 20:52:28 2019
@@ -1,2 +1,2 @@
/tomcat/tc8.0.x/trunk:1809644
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1840535,1840634,1840641,1840653,1840655,1840681,1840706-1840707,1840709,1840712,1840737,1840747,1840759,1840763-1840764,1840812,1840817,1840922,1841069,1841347,1841445,1841746,1841757,1841893,1842203,1842656,1842658-1842659,1842691,1842702,1842706,1842725,1842809,1842816-1842817,1842878,1842950,1843048,1843142,1843314,1843404-1843405,1843428-1843429,1843474,1843536,1843542,1843601,1843630,1843657,1843900,1843991,1844065,1844161-1844162,1844493,1844496-1844497,1844502,1845099,1845157-1845163,1845203,1845205,1845210,1845249-1845250,1845257,1845338,1845462-1845463,1845465,1845469,1845472,1845489,1845495,1845519,1845573,1845770,1845799,1845893,1845903,1845923,1846058,1846236,1846430,1846545,1846551,1846716,1846750,1846753,1846900,1846928,1847015,1847022,1847028,1847041,1847097,1847102,1847104,1847107,1847118,1847123,1847144,1847153,1847318,1847320,1847323,1847326,1847412,1847414-1847417,1847472,1847474,1847504,1847853-1847854,1848046,1848071,1848195,1848240,1848320-1848322,1848330,18483
47-1848348,1848415,1848419,1848670,1848675,1848682,1848709,1848795,1848868,1848935,1848959,1848966,1849281,1849310-1849311,1849316,1849473,1850127,1850400,1850403,1850506
Copied:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java
(from r1845157,
tomcat/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java)
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java?p2=tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java&p1=tomcat/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java&r1=1845157&r2=1850508&rev=1850508&view=diff
==============================================================================
---
tomcat/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java
(original)
+++
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java
Sat Jan 5 20:52:28 2019
@@ -17,16 +17,21 @@
package org.apache.catalina.tribes.group.interceptors;
import java.security.GeneralSecurityException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
import java.security.SecureRandom;
+import java.security.spec.AlgorithmParameterSpec;
+import java.util.concurrent.ConcurrentLinkedQueue;
-import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
-import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.catalina.tribes.Channel;
import org.apache.catalina.tribes.ChannelException;
+import org.apache.catalina.tribes.ChannelInterceptor;
import org.apache.catalina.tribes.ChannelMessage;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.group.ChannelInterceptorBase;
@@ -35,7 +40,7 @@ import org.apache.catalina.tribes.io.XBy
import org.apache.catalina.tribes.util.StringManager;
import org.apache.juli.logging.Log;
import org.apache.juli.logging.LogFactory;
-import org.apache.tomcat.util.buf.HexUtils;
+
/**
* Adds encryption using a pre-shared key.
@@ -58,20 +63,24 @@ public class EncryptInterceptor extends
private String providerName;
private String encryptionAlgorithm = DEFAULT_ENCRYPTION_ALGORITHM;
private byte[] encryptionKeyBytes;
+ private String encryptionKeyString;
+
- private Cipher encryptionCipher;
- private Cipher decryptionCipher;
+ private BaseEncryptionManager encryptionManager;
public EncryptInterceptor() {
}
@Override
public void start(int svc) throws ChannelException {
+ validateChannelChain();
+
if(Channel.SND_TX_SEQ == (svc & Channel.SND_TX_SEQ)) {
try {
- initCiphers();
+ encryptionManager =
createEncryptionManager(getEncryptionAlgorithm(),
+ getEncryptionKeyInternal(),
+ getProviderName());
} catch (GeneralSecurityException gse) {
- log.fatal(sm.getString("encryptInterceptor.init.failed"));
throw new
ChannelException(sm.getString("encryptInterceptor.init.failed"), gse);
}
}
@@ -79,6 +88,25 @@ public class EncryptInterceptor extends
super.start(svc);
}
+ private void validateChannelChain() throws ChannelException {
+ ChannelInterceptor interceptor = getPrevious();
+ while(null != interceptor) {
+ if(interceptor instanceof TcpFailureDetector)
+ throw new
ChannelConfigException(sm.getString("encryptInterceptor.tcpFailureDetector.ordering"));
+
+ interceptor = interceptor.getPrevious();
+ }
+ }
+
+ @Override
+ public void stop(int svc) throws ChannelException {
+ if(Channel.SND_TX_SEQ == (svc & Channel.SND_TX_SEQ)) {
+ encryptionManager.shutdown();
+ }
+
+ super.stop(svc);
+ }
+
@Override
public void sendMessage(Member[] destination, ChannelMessage msg,
InterceptorPayload payload)
throws ChannelException {
@@ -86,23 +114,20 @@ public class EncryptInterceptor extends
byte[] data = msg.getMessage().getBytes();
// See #encrypt(byte[]) for an explanation of the return value
- byte[][] bytes = encrypt(data);
+ byte[][] bytes = encryptionManager.encrypt(data);
XByteBuffer xbb = msg.getMessage();
// Completely replace the message
- xbb.setLength(0);
+ xbb.clear();
xbb.append(bytes[0], 0, bytes[0].length);
xbb.append(bytes[1], 0, bytes[1].length);
super.sendMessage(destination, msg, payload);
- } catch (IllegalBlockSizeException ibse) {
- log.error(sm.getString("encryptInterceptor.encrypt.failed"));
- throw new ChannelException(ibse);
- } catch (BadPaddingException bpe) {
+ } catch (GeneralSecurityException gse) {
log.error(sm.getString("encryptInterceptor.encrypt.failed"));
- throw new ChannelException(bpe);
+ throw new ChannelException(gse);
}
}
@@ -111,40 +136,32 @@ public class EncryptInterceptor extends
try {
byte[] data = msg.getMessage().getBytes();
- data = decrypt(data);
-
- // Remove the decrypted IV/nonce block from the front of the
message
- int blockSize = getDecryptionCipher().getBlockSize();
- int trimmedSize = data.length - blockSize;
- if(trimmedSize < 0) {
-
log.error(sm.getString("encryptInterceptor.decrypt.error.short-message"));
- throw new
IllegalStateException(sm.getString("encryptInterceptor.decrypt.error.short-message"));
- }
+ data = encryptionManager.decrypt(data);
XByteBuffer xbb = msg.getMessage();
// Completely replace the message with the decrypted one
- xbb.setLength(0);
- xbb.append(data, blockSize, data.length - blockSize);
+ xbb.clear();
+ xbb.append(data, 0, data.length);
super.messageReceived(msg);
- } catch (IllegalBlockSizeException ibse) {
- log.error(sm.getString("encryptInterceptor.decrypt.failed"), ibse);
- } catch (BadPaddingException bpe) {
- log.error(sm.getString("encryptInterceptor.decrypt.failed"), bpe);
+ } catch (GeneralSecurityException gse) {
+ log.error(sm.getString("encryptInterceptor.decrypt.failed"), gse);
}
}
/**
* Sets the encryption algorithm to be used for encrypting and decrypting
* channel messages. You must specify the
<code>algorithm/mode/padding</code>.
- * Information on what standard algorithm names are, please see
- * {@link
https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html}.
+ * Information on standard algorithm names may be found in the
+ * <a
href="https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html";>Java
+ * documentation</a>.
*
* Default is <code>AES/CBC/PKCS5Padding</code>.
*
* @param algorithm The algorithm to use.
*/
+ @Override
public void setEncryptionAlgorithm(String algorithm) {
if(null == getEncryptionAlgorithm())
throw new
IllegalStateException(sm.getString("encryptInterceptor.algorithm.required"));
@@ -165,6 +182,7 @@ public class EncryptInterceptor extends
*
* @return The algorithm being used, including the algorithm mode and
padding.
*/
+ @Override
public String getEncryptionAlgorithm() {
return encryptionAlgorithm;
}
@@ -175,11 +193,13 @@ public class EncryptInterceptor extends
*
* @param key The encryption key.
*/
+ @Override
public void setEncryptionKey(byte[] key) {
- if(null == key)
- key = null;
- else
+ if (null == key) {
+ encryptionKeyBytes = null;
+ } else {
encryptionKeyBytes = key.clone();
+ }
}
/**
@@ -188,13 +208,15 @@ public class EncryptInterceptor extends
* will be shown as "ab". The length of the string in characters will
* be twice the length of the key in bytes.
*
- * @return The encryption key.
+ * @param keyBytes The encryption key.
*/
public void setEncryptionKey(String keyBytes) {
- if(null == keyBytes)
+ this.encryptionKeyString = keyBytes;
+ if (null == keyBytes) {
setEncryptionKey((byte[])null);
- else
- setEncryptionKey(HexUtils.fromHexString(keyBytes.trim()));
+ } else {
+ setEncryptionKey(fromHexString(keyBytes.trim()));
+ }
}
/**
@@ -202,6 +224,7 @@ public class EncryptInterceptor extends
*
* @return The encryption key.
*/
+ @Override
public byte[] getEncryptionKey() {
byte[] key = getEncryptionKeyInternal();
@@ -215,6 +238,14 @@ public class EncryptInterceptor extends
return encryptionKeyBytes;
}
+ public String getEncryptionKeyString() {
+ return encryptionKeyString;
+ }
+
+ public void setEncryptionKeyString(String encryptionKeyString) {
+ setEncryptionKey(encryptionKeyString);
+ }
+
/**
* Sets the JCA provider name used for cryptographic activities.
*
@@ -222,6 +253,7 @@ public class EncryptInterceptor extends
*
* @param provider The name of the JCA provider.
*/
+ @Override
public void setProviderName(String provider) {
providerName = provider;
}
@@ -233,124 +265,375 @@ public class EncryptInterceptor extends
*
* @return The name of the JCA provider.
*/
+ @Override
public String getProviderName() {
return providerName;
}
- private void initCiphers() throws GeneralSecurityException {
- if(null == getEncryptionKey())
- throw new
IllegalStateException(sm.getString("encryptInterceptor.key.required"));
+ // Copied from org.apache.tomcat.util.buf.HexUtils
- String algorithm = getEncryptionAlgorithm();
+ private static final int[] DEC = {
+ 00, 01, 02, 03, 04, 05, 06, 07, 8, 9, -1, -1, -1, -1, -1, -1,
+ -1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+ -1, 10, 11, 12, 13, 14, 15,
+ };
- String mode = getAlgorithmMode(algorithm);
- if(!"CBC".equalsIgnoreCase(mode))
- throw new
IllegalArgumentException(sm.getString("encryptInterceptor.algorithm.requires-cbc-mode",
mode));
+ private static int getDec(int index) {
+ // Fast for correct values, slower for incorrect ones
+ try {
+ return DEC[index - '0'];
+ } catch (ArrayIndexOutOfBoundsException ex) {
+ return -1;
+ }
+ }
- Cipher cipher;
- String providerName = getProviderName();
- if(null == providerName) {
- cipher = Cipher.getInstance(algorithm);
- } else {
- cipher = Cipher.getInstance(algorithm, getProviderName());
+ private static byte[] fromHexString(String input) {
+ if (input == null) {
+ return null;
}
- byte[] iv = new byte[cipher.getBlockSize()];
+ if ((input.length() & 1) == 1) {
+ // Odd number of characters
+ throw new
IllegalArgumentException(sm.getString("hexUtils.fromHex.oddDigits"));
+ }
- // Always use a random IV For cipher setup.
- // The recipient doesn't need the (matching) IV because we will always
- // pre-pad messages with the IV as a nonce.
- new SecureRandom().nextBytes(iv);
+ char[] inputChars = input.toCharArray();
+ byte[] result = new byte[input.length() >> 1];
+ for (int i = 0; i < result.length; i++) {
+ int upperNibble = getDec(inputChars[2*i]);
+ int lowerNibble = getDec(inputChars[2*i + 1]);
+ if (upperNibble < 0 || lowerNibble < 0) {
+ // Non hex character
+ throw new
IllegalArgumentException(sm.getString("hexUtils.fromHex.nonHex"));
+ }
+ result[i] = (byte) ((upperNibble << 4) + lowerNibble);
+ }
+ return result;
+ }
- IvParameterSpec IV = new IvParameterSpec(iv);
+ private static BaseEncryptionManager createEncryptionManager(String
algorithm,
+ byte[] encryptionKey, String providerName)
+ throws NoSuchAlgorithmException, NoSuchPaddingException,
NoSuchProviderException {
+ if(null == encryptionKey)
+ throw new
IllegalStateException(sm.getString("encryptInterceptor.key.required"));
+
+ String algorithmName;
+ String algorithmMode;
- // If this is a cipher transform of the form ALGO/MODE/PAD,
+ // We need to break-apart the algorithm name e.g. AES/CBC/PKCS5Padding
// take just the algorithm part.
int pos = algorithm.indexOf('/');
- String bareAlgorithm;
if(pos >= 0) {
- bareAlgorithm = algorithm.substring(0, pos);
+ algorithmName = algorithm.substring(0, pos);
+ int pos2 = algorithm.indexOf('/', pos+1);
+
+ if(pos2 >= 0) {
+ algorithmMode = algorithm.substring(pos + 1, pos2);
+ } else {
+ algorithmMode = "CBC";
+ }
} else {
- bareAlgorithm = algorithm;
+ algorithmName = algorithm;
+ algorithmMode = "CBC";
}
- SecretKeySpec encryptionKey = new SecretKeySpec(getEncryptionKey(),
bareAlgorithm);
+ if("GCM".equalsIgnoreCase(algorithmMode))
+ return new GCMEncryptionManager(algorithm, new
SecretKeySpec(encryptionKey, algorithmName), providerName);
+ else if("CBC".equalsIgnoreCase(algorithmMode)
+ || "OFB".equalsIgnoreCase(algorithmMode)
+ || "CFB".equalsIgnoreCase(algorithmMode))
+ return new BaseEncryptionManager(algorithm,
+ new SecretKeySpec(encryptionKey, algorithmName),
+ providerName);
+// else if("ECB".equalsIgnoreCase(algorithmMode)) {
+ // Note: ECB is not an appropriate mode for secure communications.
+// return new ECBEncryptionManager(algorithm, new
SecretKeySpec(encryptionKey, algorithmName), providerName);
+ else
+ throw new
IllegalArgumentException(sm.getString("encryptInterceptor.algorithm.unsupported-mode",
algorithmMode));
+ }
- cipher.init(Cipher.ENCRYPT_MODE, encryptionKey, IV);
+ private static class BaseEncryptionManager {
+ /**
+ * The fully-specified algorithm e.g. AES/CBC/PKCS5Padding.
+ */
+ private final String algorithm;
+
+ /**
+ * The block size of the cipher.
+ */
+ private final int blockSize;
+
+ /**
+ * The cryptographic provider name.
+ */
+ private final String providerName;
+
+ /**
+ * The secret key to use for encryption and decryption operations.
+ */
+ private final SecretKeySpec secretKey;
+
+ /**
+ * A pool of Cipher objects. Ciphers are expensive to create, but not
+ * to re-initialize, so we use a pool of them which grows as necessary.
+ */
+ private final ConcurrentLinkedQueue<Cipher> cipherPool;
+
+ /**
+ * A pool of SecureRandom objects. Each encrypt operation requires
access
+ * to a source of randomness. SecureRandom is thread-safe, but sharing
a
+ * single instance will likely be a bottleneck.
+ */
+ private final ConcurrentLinkedQueue<SecureRandom> randomPool;
+
+ public BaseEncryptionManager(String algorithm, SecretKeySpec
secretKey, String providerName)
+ throws NoSuchAlgorithmException, NoSuchPaddingException,
NoSuchProviderException {
+ this.algorithm = algorithm;
+ this.providerName = providerName;
+ this.secretKey = secretKey;
+
+ cipherPool = new ConcurrentLinkedQueue<>();
+ Cipher cipher = createCipher();
+ blockSize = cipher.getBlockSize();
+ cipherPool.offer(cipher);
+ randomPool = new ConcurrentLinkedQueue<>();
+ }
- encryptionCipher = cipher;
+ public void shutdown() {
+ // Individual Cipher and SecureRandom objects need no explicit
teardown
+ cipherPool.clear();
+ randomPool.clear();
+ }
- if(null == providerName) {
- cipher = Cipher.getInstance(algorithm);
- } else {
- cipher = Cipher.getInstance(algorithm, getProviderName());
+ private String getAlgorithm() {
+ return algorithm;
}
- cipher.init(Cipher.DECRYPT_MODE, encryptionKey, new
IvParameterSpec(iv));
+ private SecretKeySpec getSecretKey() {
+ return secretKey;
+ }
- decryptionCipher = cipher;
- }
+ /**
+ * Gets the size, in bytes, of the initialization vector for the
+ * cipher being used. The IV size is often, but not always, the block
+ * size for the cipher.
+ *
+ * @return The size of the initialization vector for this algorithm.
+ */
+ protected int getIVSize() {
+ return blockSize;
+ }
- private Cipher getEncryptionCipher() {
- return encryptionCipher;
- }
+ private String getProviderName() {
+ return providerName;
+ }
- private Cipher getDecryptionCipher() {
- return decryptionCipher;
- }
+ private Cipher createCipher()
+ throws NoSuchAlgorithmException, NoSuchPaddingException,
NoSuchProviderException {
+ String providerName = getProviderName();
+
+ if(null == providerName) {
+ return Cipher.getInstance(getAlgorithm());
+ } else {
+ return Cipher.getInstance(getAlgorithm(), providerName);
+ }
+ }
- private static String getAlgorithmMode(String algorithm) {
- int start = algorithm.indexOf('/');
- if(start < 0)
- throw new
IllegalArgumentException(sm.getString("encryptInterceptor.algorithm.required"));
- int end = algorithm.indexOf('/', start + 1);
- if(start < 0)
- throw new
IllegalArgumentException(sm.getString("encryptInterceptor.algorithm.required"));
+ private Cipher getCipher() throws GeneralSecurityException {
+ Cipher cipher = cipherPool.poll();
+
+ if(null == cipher) {
+ cipher = createCipher();
+ }
+
+ return cipher;
+ }
+
+ private void returnCipher(Cipher cipher) {
+ cipherPool.offer(cipher);
+ }
+
+ private SecureRandom getRandom() {
+ SecureRandom random = randomPool.poll();
+
+ if(null == random) {
+ random = new SecureRandom();
+ }
+
+ return random;
+ }
+
+ private void returnRandom(SecureRandom random) {
+ randomPool.offer(random);
+ }
+
+ /**
+ * Encrypts the input <code>bytes</code> into two separate byte arrays:
+ * one for the random initialization vector (IV) used for this message,
+ * and the second one containing the actual encrypted payload.
+ *
+ * This method returns a pair of byte arrays instead of a single
+ * concatenated one to reduce the number of byte buffers created
+ * and copied during the whole operation -- including message
re-building.
+ *
+ * @param bytes The data to encrypt.
+ *
+ * @return The IV in [0] and the encrypted data in [1].
+ *
+ * @throws GeneralSecurityException If the input data cannot be
encrypted.
+ */
+ private byte[][] encrypt(byte[] bytes) throws GeneralSecurityException
{
+ Cipher cipher = null;
+
+ // Always use a random IV For cipher setup.
+ // The recipient doesn't need the (matching) IV because we will
always
+ // pre-pad messages with the IV as a nonce.
+ byte[] iv = generateIVBytes();
+
+ try {
+ cipher = getCipher();
+ cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(),
generateIV(iv, 0, getIVSize()));
+
+ // Prepend the IV to the beginning of the encrypted data
+ byte[][] data = new byte[2][];
+ data[0] = iv;
+ data[1] = cipher.doFinal(bytes);
+
+ return data;
+ } finally {
+ if(null != cipher)
+ returnCipher(cipher);
+ }
+ }
+
+ /**
+ * Decrypts the input <code>bytes</code>.
+ *
+ * @param bytes The data to decrypt.
+ *
+ * @return The decrypted data.
+ *
+ * @throws GeneralSecurityException If the input data cannot be
decrypted.
+ */
+ private byte[] decrypt(byte[] bytes) throws GeneralSecurityException {
+ Cipher cipher = null;
+
+ int ivSize = getIVSize();
+ AlgorithmParameterSpec IV = generateIV(bytes, 0, ivSize);
+
+ try {
+ cipher = getCipher();
+
+ cipher.init(Cipher.DECRYPT_MODE, getSecretKey(), IV);
+
+ // Decrypt remainder of the message.
+ return cipher.doFinal(bytes, ivSize, bytes.length - ivSize);
+ } finally {
+ if(null != cipher)
+ returnCipher(cipher);
+ }
+ }
+
+ protected byte[] generateIVBytes() {
+ byte[] ivBytes = new byte[getIVSize()];
- return algorithm.substring(start + 1, end);
+ SecureRandom random = null;
+
+ try {
+ random = getRandom();
+
+ // Always use a random IV For cipher setup.
+ // The recipient doesn't need the (matching) IV because we
will always
+ // pre-pad messages with the IV as a nonce.
+ random.nextBytes(ivBytes);
+
+ return ivBytes;
+ } finally {
+ if(null != random)
+ returnRandom(random);
+ }
+ }
+
+ protected AlgorithmParameterSpec generateIV(byte[] ivBytes, int
offset, int length) {
+ return new IvParameterSpec(ivBytes, offset, length);
+ }
}
/**
- * Encrypts the input <code>bytes</code> into two separate byte arrays:
- * one for the initial block (which will be the encrypted random IV)
- * and the second one containing the actual encrypted payload.
- *
- * This method returns a pair of byte arrays instead of a single
- * concatenated one to reduce the number of byte buffers created
- * and copied during the whole operation -- including message re-building.
+ * Implements an EncryptionManager for using GCM block cipher modes.
*
- * @param bytes The data to encrypt.
- *
- * @return The encrypted IV block in [0] and the encrypted data in [1].
- *
- * @throws GeneralSecurityException If there is a problem performing the
encryption.
+ * GCM works a little differently than some of the other block cipher modes
+ * supported by EncryptInterceptor. First of all, it requires a different
+ * kind of AlgorithmParameterSpec object to be used, and second, it
+ * requires a slightly different initialization vector and something called
+ * an "authentication tag".
+ *
+ * The choice of IV length can be somewhat arbitrary, but there is
consensus
+ * that 96-bit (12-byte) IVs for GCM are the best trade-off between
security
+ * and performance. For other block cipher modes, IV length is the same as
+ * the block size.
+ *
+ * The "authentication tag" is a computed authentication value based upon
+ * the message and the encryption process. GCM defines these tags as the
+ * number of bits to use for the authentication tag, and it's clear that
+ * the highest number of bits supported 128-bit provide the best security.
*/
- private byte[][] encrypt(byte[] bytes) throws IllegalBlockSizeException,
BadPaddingException {
- Cipher cipher = getEncryptionCipher();
+ private static class GCMEncryptionManager extends BaseEncryptionManager
+ {
+ public GCMEncryptionManager(String algorithm, SecretKeySpec secretKey,
String providerName)
+ throws NoSuchAlgorithmException, NoSuchPaddingException,
NoSuchProviderException {
+ super(algorithm, secretKey, providerName);
+ }
- // Adding the IV to the beginning of the encrypted data
- byte[] iv = cipher.getIV();
+ @Override
+ protected int getIVSize() {
+ return 12; // See class javadoc for explanation of this magic
number (12)
+ }
- byte[][] data = new byte[2][];
- data[0] = cipher.update(iv, 0, iv.length);
- data[1] = cipher.doFinal(bytes);
+ @Override
+ protected AlgorithmParameterSpec generateIV(byte[] bytes, int offset,
int length) {
+ // See class javadoc for explanation of this magic number (128)
+ return new GCMParameterSpec(128, bytes, offset, length);
+ }
+ }
- return data;
+ @SuppressWarnings("unused")
+ private static class ECBEncryptionManager extends BaseEncryptionManager
+ {
+ public ECBEncryptionManager(String algorithm, SecretKeySpec secretKey,
String providerName)
+ throws NoSuchAlgorithmException, NoSuchPaddingException,
NoSuchProviderException {
+ super(algorithm, secretKey, providerName);
+ }
+
+ private static final byte[] EMPTY_IV = new byte[0];
+
+ @Override
+ protected int getIVSize() {
+ return 0;
+ }
+
+ @Override
+ protected byte[] generateIVBytes() {
+ return EMPTY_IV;
+ }
+
+ @Override
+ protected AlgorithmParameterSpec generateIV(byte[] bytes, int offset,
int length) {
+ return null;
+ }
}
- /**
- * Decrypts the input <code>bytes</code>.
- *
- * @param bytes The data to decrypt.
- *
- * @return The decrypted data.
- *
- * @throws GeneralSecurityException If there is a problem performing the
decryption.
- */
- private byte[] decrypt(byte[] bytes) throws IllegalBlockSizeException,
BadPaddingException {
- return getDecryptionCipher().doFinal(bytes);
+ static class ChannelConfigException
+ extends ChannelException
+ {
+ private static final long serialVersionUID = 1L;
+
+ public ChannelConfigException(String message) {
+ super(message);
+ }
}
}
Propchange:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptor.java
------------------------------------------------------------------------------
svn:eol-style = native
Propchange:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/EncryptInterceptorMBean.java
------------------------------------------------------------------------------
svn:eol-style = native
Modified:
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/LocalStrings.properties
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/LocalStrings.properties?rev=1850508&r1=1850507&r2=1850508&view=diff
==============================================================================
---
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/LocalStrings.properties
(original)
+++
tomcat/tc8.5.x/trunk/java/org/apache/catalina/tribes/group/interceptors/LocalStrings.properties
Sat Jan 5 20:52:28 2019
@@ -15,6 +15,14 @@
domainFilterInterceptor.message.refused=Received message from cluster[{0}] was
refused.
domainFilterInterceptor.member.refused=Member was refused to join cluster[{0}]
+encryptInterceptor.algorithm.required=Encryption algorithm is required,
fully-specified e.g. AES/CBC/PKCS5Padding
+encryptInterceptor.algorithm.unsupported-mode=EncryptInterceptor does not
support block cipher mode [{0}]
+encryptInterceptor.decrypt.error.short-message=Failed to decrypt message:
premature end-of-message
+encryptInterceptor.decrypt.failed=Failed to decrypt message
+encryptInterceptor.encrypt.failed=Failed to encrypt message
+encryptInterceptor.init.failed=Failed to initialize EncryptInterceptor
+encryptInterceptor.key.required=Encryption key is required
+encryptInterceptor.tcpFailureDetector.ordering=EncryptInterceptor must be
upstream of TcpFailureDetector. Please re-order EncryptInterceptor to be listed
before TcpFailureDetector in your channel interceptor pipeline.
fragmentationInterceptor.heartbeat.failed=Unable to perform heartbeat clean up
in the frag interceptor
fragmentationInterceptor.fragments.missing=Fragments are missing.
gzipInterceptor.compress.failed=Unable to compress byte contents
@@ -60,4 +68,4 @@ throughputInterceptor.report=ThroughputI
\n\tRx Speed:{8} MB/sec (since 1st msg)\
\n\tReceived:{9} MB]\n
twoPhaseCommitInterceptor.originalMessage.missing=Received a confirmation, but
original message is missing. Id:[{0}]
-twoPhaseCommitInterceptor.heartbeat.failed=Unable to perform heartbeat on the
TwoPhaseCommit interceptor.
\ No newline at end of file
+twoPhaseCommitInterceptor.heartbeat.failed=Unable to perform heartbeat on the
TwoPhaseCommit interceptor.
Copied:
tomcat/tc8.5.x/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java
(from r1845157,
tomcat/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java)
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java?p2=tomcat/tc8.5.x/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java&p1=tomcat/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java&r1=1845157&r2=1850508&rev=1850508&view=diff
==============================================================================
---
tomcat/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java
(original)
+++
tomcat/tc8.5.x/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java
Sat Jan 5 20:52:28 2019
@@ -1,8 +1,38 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
package org.apache.catalina.tribes.group.interceptors;
-import static org.junit.Assert.*;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.hamcrest.core.IsEqual;
+import org.hamcrest.core.IsNot;
+
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.FixMethodOrder;
+import org.junit.Ignore;
+import org.junit.Test;
+import org.junit.runners.MethodSorters;
-import java.nio.charset.StandardCharsets;
import org.apache.catalina.tribes.Channel;
import org.apache.catalina.tribes.ChannelException;
import org.apache.catalina.tribes.ChannelInterceptor;
@@ -12,9 +42,6 @@ import org.apache.catalina.tribes.group.
import org.apache.catalina.tribes.group.InterceptorPayload;
import org.apache.catalina.tribes.io.ChannelData;
import org.apache.catalina.tribes.io.XByteBuffer;
-import org.apache.tomcat.util.buf.HexUtils;
-import org.junit.Before;
-import org.junit.Test;
/**
* Tests the EncryptInterceptor.
@@ -23,14 +50,26 @@ import org.junit.Test;
* though the interceptor actually operates on byte arrays. This is done
* for readability for the tests and their outputs.
*/
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class TestEncryptInterceptor {
- private static final String encryptionKey128 =
HexUtils.toHexString("cafebabedeadbeef".getBytes(StandardCharsets.UTF_8));
- private static final String encryptionKey192 =
HexUtils.toHexString("cafebabedeadbeefbeefcafe".getBytes(StandardCharsets.UTF_8));
- private static final String encryptionKey256 =
HexUtils.toHexString("cafebabedeadbeefcafebabedeadbeef".getBytes(StandardCharsets.UTF_8));
+ private static final String MESSAGE_FILE = "message.bin";
+
+ private static final String encryptionKey128 =
"cafebabedeadbeefbeefcafecafebabe";
+ private static final String encryptionKey192 =
"cafebabedeadbeefbeefcafecafebabedeadbeefbeefcafe";
+ private static final String encryptionKey256 =
"cafebabedeadbeefcafebabedeadbeefcafebabedeadbeefcafebabedeadbeef";
EncryptInterceptor src;
EncryptInterceptor dest;
+
+ @AfterClass
+ public static void cleanup() {
+ File f = new File(MESSAGE_FILE);
+ if (f.isFile()) {
+ Assert.assertTrue(f.delete());
+ }
+ }
+
@Before
public void setup() {
src = new EncryptInterceptor();
@@ -50,9 +89,37 @@ public class TestEncryptInterceptor {
String testInput = "The quick brown fox jumps over the lazy dog.";
- assertEquals("Basic roundtrip failed",
+ Assert.assertEquals("Basic roundtrip failed",
+ testInput,
+ roundTrip(testInput, src, dest));
+ }
+
+ @Test
+ public void testMultipleMessages() throws Exception {
+ src.start(Channel.SND_TX_SEQ);
+ dest.start(Channel.SND_TX_SEQ);
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ Assert.assertEquals("Basic roundtrip failed",
testInput,
roundTrip(testInput, src, dest));
+
+ Assert.assertEquals("Second roundtrip failed",
+ testInput,
+ roundTrip(testInput, src, dest));
+
+ Assert.assertEquals("Third roundtrip failed",
+ testInput,
+ roundTrip(testInput, src, dest));
+
+ Assert.assertEquals("Fourth roundtrip failed",
+ testInput,
+ roundTrip(testInput, src, dest));
+
+ Assert.assertEquals("Fifth roundtrip failed",
+ testInput,
+ roundTrip(testInput, src, dest));
}
@Test
@@ -62,19 +129,32 @@ public class TestEncryptInterceptor {
String testInput = "x";
- assertEquals("Tiny payload roundtrip failed",
+ Assert.assertEquals("Tiny payload roundtrip failed",
testInput,
roundTrip(testInput, src, dest));
}
@Test
+ public void testLargePayload() throws Exception {
+ src.start(Channel.SND_TX_SEQ);
+ dest.start(Channel.SND_TX_SEQ);
+
+ byte[] bytes = new byte[1024*1024];
+
+ Assert.assertArrayEquals("Huge payload roundtrip failed",
+ bytes,
+ roundTrip(bytes, src, dest));
+ }
+
+ @Test
+ @Ignore("Too big for default settings. Breaks Gump, Eclipse, ...")
public void testHugePayload() throws Exception {
src.start(Channel.SND_TX_SEQ);
dest.start(Channel.SND_TX_SEQ);
- byte[] bytes = new byte[1073741824]; // 1MiB, all zeros
+ byte[] bytes = new byte[1024*1024*1024];
- assertArrayEquals("Tiny payload roundtrip failed",
+ Assert.assertArrayEquals("Huge payload roundtrip failed",
bytes,
roundTrip(bytes, src, dest));
}
@@ -88,7 +168,7 @@ public class TestEncryptInterceptor {
String testInput = "The quick brown fox jumps over the lazy dog.";
- assertEquals("Failed to set custom provider name",
+ Assert.assertEquals("Failed to set custom provider name",
testInput,
roundTrip(testInput, src, dest));
}
@@ -102,7 +182,7 @@ public class TestEncryptInterceptor {
String testInput = "The quick brown fox jumps over the lazy dog.";
- assertEquals("Failed to set custom provider name",
+ Assert.assertEquals("Failed to set custom provider name",
testInput,
roundTrip(testInput, src, dest));
}
@@ -116,7 +196,7 @@ public class TestEncryptInterceptor {
String testInput = "The quick brown fox jumps over the lazy dog.";
- assertEquals("Failed to set custom provider name",
+ Assert.assertEquals("Failed to set custom provider name",
testInput,
roundTrip(testInput, src, dest));
}
@@ -129,7 +209,7 @@ public class TestEncryptInterceptor {
bytes = roundTrip(bytes, src, dest);
- return new
String(((ValueCaptureInterceptor)dest.getPrevious()).getValue(), "UTF-8");
+ return new String(bytes, "UTF-8");
}
/**
@@ -143,6 +223,229 @@ public class TestEncryptInterceptor {
return ((ValueCaptureInterceptor)dest.getPrevious()).getValue();
}
+ @Test
+ @Ignore("ECB mode isn't implemented because it's insecure")
+ public void testECB() throws Exception {
+ src.setEncryptionAlgorithm("AES/ECB/PKCS5Padding");
+ src.start(Channel.SND_TX_SEQ);
+ dest.setEncryptionAlgorithm("AES/ECB/PKCS5Padding");
+ dest.start(Channel.SND_TX_SEQ);
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ Assert.assertEquals("Failed in ECB mode",
+ testInput,
+ roundTrip(testInput, src, dest));
+ }
+
+ @Test
+ public void testOFB() throws Exception {
+ src.setEncryptionAlgorithm("AES/OFB/PKCS5Padding");
+ src.start(Channel.SND_TX_SEQ);
+ dest.setEncryptionAlgorithm("AES/OFB/PKCS5Padding");
+ dest.start(Channel.SND_TX_SEQ);
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ Assert.assertEquals("Failed in OFB mode",
+ testInput,
+ roundTrip(testInput, src, dest));
+ }
+
+ @Test
+ public void testCFB() throws Exception {
+ src.setEncryptionAlgorithm("AES/CFB/PKCS5Padding");
+ src.start(Channel.SND_TX_SEQ);
+ dest.setEncryptionAlgorithm("AES/CFB/PKCS5Padding");
+ dest.start(Channel.SND_TX_SEQ);
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ Assert.assertEquals("Failed in CFB mode",
+ testInput,
+ roundTrip(testInput, src, dest));
+ }
+
+ @Test
+ public void testGCM() throws Exception {
+ src.setEncryptionAlgorithm("AES/GCM/PKCS5Padding");
+ src.start(Channel.SND_TX_SEQ);
+ dest.setEncryptionAlgorithm("AES/GCM/PKCS5Padding");
+ dest.start(Channel.SND_TX_SEQ);
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ Assert.assertEquals("Failed in GCM mode",
+ testInput,
+ roundTrip(testInput, src, dest));
+ }
+
+ @Test
+ public void testIllegalECB() throws Exception {
+ try {
+ src.setEncryptionAlgorithm("AES/ECB/PKCS5Padding");
+ src.start(Channel.SND_TX_SEQ);
+
+ // start() should trigger IllegalArgumentException
+ Assert.fail("ECB mode is not being refused");
+ } catch (IllegalArgumentException iae) {
+ // Expected
+ }
+ }
+
+ @Test
+ public void testViaFile() throws Exception {
+ src.start(Channel.SND_TX_SEQ);
+ src.setNext(new ValueCaptureInterceptor());
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ ChannelData msg = new ChannelData(false);
+ msg.setMessage(new XByteBuffer(testInput.getBytes("UTF-8"), false));
+ src.sendMessage(null, msg, null);
+
+ byte[] bytes = ((ValueCaptureInterceptor)src.getNext()).getValue();
+
+ try (FileOutputStream out = new FileOutputStream(MESSAGE_FILE)) {
+ out.write(bytes);
+ }
+
+ dest.start(Channel.SND_TX_SEQ);
+
+ bytes = new byte[8192];
+ int read;
+
+ try (FileInputStream in = new FileInputStream(MESSAGE_FILE)) {
+ read = in.read(bytes);
+ }
+
+ msg = new ChannelData(false);
+ XByteBuffer xbb = new XByteBuffer(read, false);
+ xbb.append(bytes, 0, read);
+ msg.setMessage(xbb);
+
+ dest.messageReceived(msg);
+ }
+
+ @Test
+ public void testMessageUniqueness() throws Exception {
+ src.start(Channel.SND_TX_SEQ);
+ src.setNext(new ValueCaptureInterceptor());
+
+ String testInput = "The quick brown fox jumps over the lazy dog.";
+
+ ChannelData msg = new ChannelData(false);
+ msg.setMessage(new XByteBuffer(testInput.getBytes("UTF-8"), false));
+ src.sendMessage(null, msg, null);
+
+ byte[] cipherText1 =
((ValueCaptureInterceptor)src.getNext()).getValue();
+
+ msg.setMessage(new XByteBuffer(testInput.getBytes("UTF-8"), false));
+ src.sendMessage(null, msg, null);
+
+ byte[] cipherText2 =
((ValueCaptureInterceptor)src.getNext()).getValue();
+
+ Assert.assertThat("Two identical cleartexts encrypt to the same
ciphertext",
+ cipherText1, IsNot.not(IsEqual.equalTo(cipherText2)));
+ }
+
+ @Test
+ public void testPickup() throws Exception {
+ File file = new File(MESSAGE_FILE);
+ if(!file.exists()) {
+ System.err.println("File message.bin does not exist. Skipping
test.");
+ return;
+ }
+
+ dest.start(Channel.SND_TX_SEQ);
+
+ byte[] bytes = new byte[8192];
+ int read;
+
+ try (FileInputStream in = new FileInputStream(file)) {
+ read = in.read(bytes);
+ }
+
+ ChannelData msg = new ChannelData(false);
+ XByteBuffer xbb = new XByteBuffer(read, false);
+ xbb.append(bytes, 0, read);
+ msg.setMessage(xbb);
+
+ dest.messageReceived(msg);
+ }
+
+ /*
+ * This test isn't guaranteed to catch any multithreaded issues, but it
+ * gives a good exercise.
+ */
+ @Test
+ public void testMultithreaded() throws Exception {
+ String inputValue = "A test string to fight over.";
+ final byte[] bytes = inputValue.getBytes("UTF-8");
+ int numThreads = 100;
+ final int messagesPerThread = 10;
+
+ dest.setPrevious(new ValuesCaptureInterceptor());
+
+ src.start(Channel.SND_TX_SEQ);
+ dest.start(Channel.SND_TX_SEQ);
+
+ Runnable job = new Runnable() {
+ @Override
+ public void run() {
+ try {
+ ChannelData msg = new ChannelData(false);
+ XByteBuffer xbb = new XByteBuffer(1024, false);
+ xbb.append(bytes, 0, bytes.length);
+ msg.setMessage(xbb);
+
+ for(int i=0; i<messagesPerThread; ++i)
+ src.sendMessage(null, msg, null);
+ } catch (ChannelException e) {
+ Assert.fail("Encountered exception sending messages: " +
e.getMessage());
+ }
+ }
+ };
+
+ Thread[] threads = new Thread[numThreads];
+ for(int i=0; i<numThreads; ++i) {
+ threads[i] = new Thread(job);
+ threads[i].setName("Message-Thread-" + i);
+ }
+
+ for(int i=0; i<numThreads; ++i)
+ threads[i].start();
+
+ for(int i=0; i<numThreads; ++i)
+ threads[i].join();
+
+ // Check all received messages to make sure they are not corrupted
+ Collection<byte[]> messages =
((ValuesCaptureInterceptor)dest.getPrevious()).getValues();
+
+ Assert.assertEquals("Did not receive all expected messages",
+ numThreads * messagesPerThread, messages.size());
+
+ for(byte[] message : messages)
+ Assert.assertArrayEquals("Message is corrupted", message, bytes);
+ }
+
+ @Test
+ public void testTcpFailureDetectorDetection() {
+ src.setPrevious(new TcpFailureDetector());
+
+ try {
+ src.start(Channel.SND_TX_SEQ);
+ Assert.fail("EncryptInterceptor should detect TcpFailureDetector
and throw an error");
+ } catch (EncryptInterceptor.ChannelConfigException cce) {
+ // Expected behavior
+ } catch (AssertionError ae) {
+ // This is the junit assertion being thrown
+ throw ae;
+ } catch (Throwable t) {
+ Assert.fail("EncryptionInterceptor should throw
ChannelConfigException, not " + t.getClass().getName());
+ }
+ }
+
/**
* Interceptor that delivers directly to a destination.
*/
@@ -188,4 +491,33 @@ public class TestEncryptInterceptor {
return value;
}
}
+
+ /**
+ * Interceptor that simply captures all messages sent to or received by it.
+ */
+ private static class ValuesCaptureInterceptor
+ extends ChannelInterceptorBase
+ {
+ private ArrayList<byte[]> messages = new ArrayList<>();
+
+ @Override
+ public void sendMessage(Member[] destination, ChannelMessage msg,
InterceptorPayload payload)
+ throws ChannelException {
+ synchronized(messages) {
+ messages.add(msg.getMessage().getBytes());
+ }
+ }
+
+ @Override
+ public void messageReceived(ChannelMessage msg) {
+ synchronized(messages) {
+ messages.add(msg.getMessage().getBytes());
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ public Collection<byte[]> getValues() {
+ return (Collection<byte[]>)messages.clone();
+ }
+ }
}
Propchange:
tomcat/tc8.5.x/trunk/test/org/apache/catalina/tribes/group/interceptors/TestEncryptInterceptor.java
------------------------------------------------------------------------------
svn:eol-style = native
Modified: tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml?rev=1850508&r1=1850507&r2=1850508&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc8.5.x/trunk/webapps/docs/changelog.xml Sat Jan 5 20:52:28 2019
@@ -214,6 +214,16 @@
</fix>
</changelog>
</subsection>
+ <subsection name="Tribes">
+ <changelog>
+ <add>
+ Add EncryptInterceptor to the portfolio of available clustering
+ interceptors. This adds symmetric encryption of session data
+ to Tomcat clustering regardless of the type of cluster manager
+ or membership being used. (schultz)
+ </add>
+ </changelog>
+ </subsection>
<subsection name="Other">
<changelog>
<fix>
Modified: tomcat/tc8.5.x/trunk/webapps/docs/config/cluster-interceptor.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc8.5.x/trunk/webapps/docs/config/cluster-interceptor.xml?rev=1850508&r1=1850507&r2=1850508&view=diff
==============================================================================
--- tomcat/tc8.5.x/trunk/webapps/docs/config/cluster-interceptor.xml (original)
+++ tomcat/tc8.5.x/trunk/webapps/docs/config/cluster-interceptor.xml Sat Jan 5
20:52:28 2019
@@ -36,7 +36,7 @@
<section name="Introduction">
<p>
Apache Tribes supports an interceptor architecture to intercept both
messages and membership notifications.
- This architecture allows decoupling of logic and opens the way for some very
kewl feature add ons.
+ This architecture allows decoupling of logic and opens the way for some very
useful feature add ons.
</p>
</section>
@@ -54,6 +54,7 @@
<li><code>org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor</code></li>
<li><code>org.apache.catalina.tribes.group.interceptors.GzipInterceptor</code></li>
<li><code>org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor</code></li>
+
<li><code>org.apache.catalina.tribes.group.interceptors.EncryptInterceptor</code></li>
</ul>
</section>
@@ -196,6 +197,44 @@
</attribute>
</attributes>
</subsection>
+ <subsection
name="org.apache.catalina.tribes.group.interceptors.EncryptInterceptor
Attributes">
+ <p>
+ The EncryptInterceptor adds encryption to the channel messages carrying
+ session data between nodes. Added in Tomcat 9.0.13.
+ </p>
+ <p>
+ If using the <code>TcpFailureDetector</code>, the
<code>EncryptInterceptor</code>
+ <i>must</i> be inserted into the interceptor chain <i>before</i> the
+ <code>TcpFailureDetector</code>. This is becuase when validating cluster
+ members, <code>TcpFailureDetector</code> writes channel data directly
+ to the other members without using the remainder of the interceptor chain,
+ but on the receiving side, the message still goes through the chain (in
reverse).
+ Because of this asymmetry, the <code>EncryptInterceptor</code> must
execute
+ <i>before</i> the <code>TcpFailureDetector</code> on the sender and
<i>after</i>
+ it on the receiver, otherwise message corruption will occur.
+ </p>
+ <attributes>
+ <attribute name="encryptionAlgorithm" required="false">
+ The encryption algorithm to be used, including the mode and padding.
Please see
+ <a
href="https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html";>https://docs.oracle.com/javase/8/docs/technotes/guides/security/StandardNames.html</a>
+ for the standard JCA names that can be used.
+
+ The <i>mode</i> is currently required to be <code>CBC</code>.
+
+ The length of the key will specify the flavor of the encryption
algorithm
+ to be used, if applicable (e.g. AES-128 versus AES-256).
+
+ The default algorithm is <code>AES/CBC/PKCS5Padding</code>.
+ </attribute>
+ <attribute name="encryptionKey" required="true">
+ The key to be used with the encryption algorithm.
+
+ The key should be specified as hex-encoded bytes of the appropriate
+ length for the algorithm (e.g. 16 bytes / 32 characters / 128 bits for
+ AES-128, 32 bytes / 64 characters / 256 bits for AES-256, etc.).
+ </attribute>
+ </attributes>
+ </subsection>
</section>
<section name="Nested Components">
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