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android / platform / libcore / 6765f902505fbdd02f25b599f942437cd805cad1 / . / src / java.base / share / classes / sun / security / ssl / SSLCipher.java
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/*
* Copyright (c) 2018, 2021, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.ssl;
import java.nio.ByteBuffer;
import java.security.AccessController;
import java.security.GeneralSecurityException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.PrivilegedAction;
import java.security.SecureRandom;
import java.security.Security;
import java.security.spec.AlgorithmParameterSpec;
import java.util.AbstractMap.SimpleImmutableEntry;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.ShortBufferException;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.IvParameterSpec;
import sun.security.ssl.Authenticator.MAC;
import static sun.security.ssl.CipherType.*;
import static sun.security.ssl.JsseJce.*;
enum SSLCipher {
// exportable ciphers
@SuppressWarnings({"unchecked", "rawtypes"})
B_NULL("NULL", NULL_CIPHER, 0, 0, 0, 0, true, true,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new NullReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_NONE
),
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new NullReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_13
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new NullWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_NONE
),
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new NullWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_13
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_RC4_40(CIPHER_RC4, STREAM_CIPHER, 5, 16, 0, 0, true, true,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new StreamReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new StreamWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_RC2_40("RC2", BLOCK_CIPHER, 5, 16, 8, 0, false, true,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new StreamReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new StreamWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_DES_40(CIPHER_DES, BLOCK_CIPHER, 5, 8, 8, 0, true, true,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T10BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T10BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
)
})),
// domestic strength ciphers
@SuppressWarnings({"unchecked", "rawtypes"})
B_RC4_128(CIPHER_RC4, STREAM_CIPHER, 16, 16, 0, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new StreamReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new StreamWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_DES(CIPHER_DES, BLOCK_CIPHER, 8, 8, 8, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T10BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T11BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_11
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T10BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T11BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_11
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_3DES(CIPHER_3DES, BLOCK_CIPHER, 24, 24, 8, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T10BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T11BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_11_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T10BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T11BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_11_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_IDEA("IDEA", BLOCK_CIPHER, 16, 16, 8, 0, false, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
null,
ProtocolVersion.PROTOCOLS_TO_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
null,
ProtocolVersion.PROTOCOLS_TO_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_AES_128(CIPHER_AES, BLOCK_CIPHER, 16, 16, 16, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T10BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T11BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_11_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T10BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T11BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_11_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_AES_256(CIPHER_AES, BLOCK_CIPHER, 32, 32, 16, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T10BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T11BlockReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_11_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T10BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_TO_10
),
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T11BlockWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_11_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_AES_128_GCM(CIPHER_AES_GCM, AEAD_CIPHER, 16, 16, 12, 4, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T12GcmReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T12GcmWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_AES_256_GCM(CIPHER_AES_GCM, AEAD_CIPHER, 32, 32, 12, 4, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T12GcmReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_12
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T12GcmWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_12
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_AES_128_GCM_IV(CIPHER_AES_GCM, AEAD_CIPHER, 16, 16, 12, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T13GcmReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_13
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T13GcmWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_13
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_AES_256_GCM_IV(CIPHER_AES_GCM, AEAD_CIPHER, 32, 32, 12, 0, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T13GcmReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_13
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T13GcmWriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_13
)
})),
@SuppressWarnings({"unchecked", "rawtypes"})
B_CC20_P1305(CIPHER_CHACHA20_POLY1305, AEAD_CIPHER, 32, 32, 12,
12, true, false,
(Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T12CC20P1305ReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_12
),
new SimpleImmutableEntry<ReadCipherGenerator, ProtocolVersion[]>(
new T13CC20P1305ReadCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_13
)
}),
(Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[])(new Map.Entry[] {
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T12CC20P1305WriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_12
),
new SimpleImmutableEntry<WriteCipherGenerator, ProtocolVersion[]>(
new T13CC20P1305WriteCipherGenerator(),
ProtocolVersion.PROTOCOLS_OF_13
)
}));
// descriptive name including key size, e.g. AES/128
final String description;
// JCE cipher transformation string, e.g. AES/CBC/NoPadding
final String transformation;
// algorithm name, e.g. AES
final String algorithm;
// supported and compile time enabled. Also see isAvailable()
final boolean allowed;
// number of bytes of entropy in the key
final int keySize;
// length of the actual cipher key in bytes.
// for non-exportable ciphers, this is the same as keySize
final int expandedKeySize;
// size of the IV
final int ivSize;
// size of fixed IV
//
// record_iv_length = ivSize - fixedIvSize
final int fixedIvSize;
// exportable under 512/40 bit rules
final boolean exportable;
// Is the cipher algorithm of Cipher Block Chaining (CBC) mode?
final CipherType cipherType;
// size of the authentication tag, only applicable to cipher suites in
// Galois Counter Mode (GCM)
//
// As far as we know, all supported GCM cipher suites use 128-bits
// authentication tags.
final int tagSize = 16;
// runtime availability
private final boolean isAvailable;
private final Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[] readCipherGenerators;
private final Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[] writeCipherGenerators;
// Map of Ciphers listed in jdk.tls.keyLimits
private static final HashMap<String, Long> cipherLimits = new HashMap<>();
// Keywords found on the jdk.tls.keyLimits security property.
static final String[] tag = {"KEYUPDATE"};
static {
final long max = 4611686018427387904L; // 2^62
@SuppressWarnings("removal")
String prop = AccessController.doPrivileged(
new PrivilegedAction<String>() {
@Override
public String run() {
return Security.getProperty("jdk.tls.keyLimits");
}
});
if (prop != null) {
String[] propvalue = prop.split(",");
for (String entry : propvalue) {
int index;
// If this is not a UsageLimit, goto to next entry.
String[] values = entry.trim().toUpperCase().split(" ");
if (values[1].contains(tag[0])) {
index = 0;
} else {
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("jdk.tls.keyLimits: Unknown action: " +
entry);
}
continue;
}
long size;
int i = values[2].indexOf("^");
try {
if (i >= 0) {
size = (long) Math.pow(2,
Integer.parseInt(values[2].substring(i + 1)));
} else {
size = Long.parseLong(values[2]);
}
if (size < 1 || size > max) {
throw new NumberFormatException(
"Length exceeded limits");
}
} catch (NumberFormatException e) {
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("jdk.tls.keyLimits: " + e.getMessage() +
": " + entry);
}
continue;
}
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("jdk.tls.keyLimits: entry = " + entry +
". " + values[0] + ":" + tag[index] + " = " + size);
}
cipherLimits.put(values[0] + ":" + tag[index], size);
}
}
}
private SSLCipher(String transformation,
CipherType cipherType, int keySize,
int expandedKeySize, int ivSize,
int fixedIvSize, boolean allowed, boolean exportable,
Map.Entry<ReadCipherGenerator,
ProtocolVersion[]>[] readCipherGenerators,
Map.Entry<WriteCipherGenerator,
ProtocolVersion[]>[] writeCipherGenerators) {
this.transformation = transformation;
String[] splits = transformation.split("/");
this.algorithm = splits[0];
this.cipherType = cipherType;
this.description = this.algorithm + "/" + (keySize << 3);
this.keySize = keySize;
this.ivSize = ivSize;
this.fixedIvSize = fixedIvSize;
this.allowed = allowed;
this.expandedKeySize = expandedKeySize;
this.exportable = exportable;
// availability of this bulk cipher
//
// AES/256 is unavailable when the default JCE policy jurisdiction files
// are installed because of key length restrictions.
this.isAvailable = allowed && isUnlimited(keySize, transformation) &&
isTransformationAvailable(transformation);
this.readCipherGenerators = readCipherGenerators;
this.writeCipherGenerators = writeCipherGenerators;
}
private static boolean isTransformationAvailable(String transformation) {
if (transformation.equals("NULL")) {
return true;
}
try {
Cipher.getInstance(transformation);
return true;
} catch (NoSuchAlgorithmException | NoSuchPaddingException e) {
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("Transformation " + transformation + " is" +
" not available.");
}
}
return false;
}
SSLReadCipher createReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SecretKey key, IvParameterSpec iv,
SecureRandom random) throws GeneralSecurityException {
if (readCipherGenerators.length == 0) {
return null;
}
ReadCipherGenerator rcg = null;
for (Map.Entry<ReadCipherGenerator,
ProtocolVersion[]> me : readCipherGenerators) {
for (ProtocolVersion pv : me.getValue()) {
if (protocolVersion == pv) {
rcg = me.getKey();
break;
}
}
}
if (rcg != null) {
return rcg.createCipher(this, authenticator,
protocolVersion, transformation, key, iv, random);
}
return null;
}
SSLWriteCipher createWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SecretKey key, IvParameterSpec iv,
SecureRandom random) throws GeneralSecurityException {
if (writeCipherGenerators.length == 0) {
return null;
}
WriteCipherGenerator wcg = null;
for (Map.Entry<WriteCipherGenerator,
ProtocolVersion[]> me : writeCipherGenerators) {
for (ProtocolVersion pv : me.getValue()) {
if (protocolVersion == pv) {
wcg = me.getKey();
break;
}
}
}
if (wcg != null) {
return wcg.createCipher(this, authenticator,
protocolVersion, transformation, key, iv, random);
}
return null;
}
/**
* Test if this bulk cipher is available. For use by CipherSuite.
*/
boolean isAvailable() {
return this.isAvailable;
}
private static boolean isUnlimited(int keySize, String transformation) {
int keySizeInBits = keySize * 8;
if (keySizeInBits > 128) { // need the JCE unlimited
// strength jurisdiction policy
try {
if (Cipher.getMaxAllowedKeyLength(
transformation) < keySizeInBits) {
return false;
}
} catch (Exception e) {
return false;
}
}
return true;
}
@Override
public String toString() {
return description;
}
interface ReadCipherGenerator {
SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException;
}
abstract static class SSLReadCipher {
final Authenticator authenticator;
final ProtocolVersion protocolVersion;
boolean keyLimitEnabled = false;
long keyLimitCountdown = 0;
SecretKey baseSecret;
SSLReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion) {
this.authenticator = authenticator;
this.protocolVersion = protocolVersion;
}
static final SSLReadCipher nullTlsReadCipher() {
try {
return B_NULL.createReadCipher(
Authenticator.nullTlsMac(),
ProtocolVersion.NONE, null, null, null);
} catch (GeneralSecurityException gse) {
// unlikely
throw new RuntimeException("Cannot create NULL SSLCipher", gse);
}
}
static final SSLReadCipher nullDTlsReadCipher() {
try {
return B_NULL.createReadCipher(
Authenticator.nullDtlsMac(),
ProtocolVersion.NONE, null, null, null);
} catch (GeneralSecurityException gse) {
// unlikely
throw new RuntimeException("Cannot create NULL SSLCipher", gse);
}
}
abstract Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException;
void dispose() {
// blank
}
abstract int estimateFragmentSize(int packetSize, int headerSize);
boolean isNullCipher() {
return false;
}
/**
* Check if processed bytes have reached the key usage limit.
* If key usage limit is not be monitored, return false.
*/
public boolean atKeyLimit() {
if (keyLimitCountdown >= 0) {
return false;
}
// Turn off limit checking as KeyUpdate will be occurring
keyLimitEnabled = false;
return true;
}
}
interface WriteCipherGenerator {
SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException;
}
abstract static class SSLWriteCipher {
final Authenticator authenticator;
final ProtocolVersion protocolVersion;
boolean keyLimitEnabled = false;
long keyLimitCountdown = 0;
SecretKey baseSecret;
SSLWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion) {
this.authenticator = authenticator;
this.protocolVersion = protocolVersion;
}
abstract int encrypt(byte contentType, ByteBuffer bb);
static final SSLWriteCipher nullTlsWriteCipher() {
try {
return B_NULL.createWriteCipher(
Authenticator.nullTlsMac(),
ProtocolVersion.NONE, null, null, null);
} catch (GeneralSecurityException gse) {
// unlikely
throw new RuntimeException(
"Cannot create NULL SSL write Cipher", gse);
}
}
static final SSLWriteCipher nullDTlsWriteCipher() {
try {
return B_NULL.createWriteCipher(
Authenticator.nullDtlsMac(),
ProtocolVersion.NONE, null, null, null);
} catch (GeneralSecurityException gse) {
// unlikely
throw new RuntimeException(
"Cannot create NULL SSL write Cipher", gse);
}
}
void dispose() {
// blank
}
abstract int getExplicitNonceSize();
abstract int calculateFragmentSize(int packetLimit, int headerSize);
abstract int calculatePacketSize(int fragmentSize, int headerSize);
boolean isCBCMode() {
return false;
}
boolean isNullCipher() {
return false;
}
/**
* Check if processed bytes have reached the key usage limit.
* If key usage limit is not be monitored, return false.
*/
public boolean atKeyLimit() {
if (keyLimitCountdown >= 0) {
return false;
}
// Turn off limit checking as KeyUpdate will be occurring
keyLimitEnabled = false;
return true;
}
}
private static final
class NullReadCipherGenerator implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new NullReadCipher(authenticator, protocolVersion);
}
static final class NullReadCipher extends SSLReadCipher {
NullReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion) {
super(authenticator, protocolVersion);
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
MAC signer = (MAC)authenticator;
if (signer.macAlg().size != 0) {
checkStreamMac(signer, bb, contentType, sequence);
} else {
authenticator.increaseSequenceNumber();
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
return packetSize - headerSize - macLen;
}
@Override
boolean isNullCipher() {
return true;
}
}
}
private static final
class NullWriteCipherGenerator implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new NullWriteCipher(authenticator, protocolVersion);
}
static final class NullWriteCipher extends SSLWriteCipher {
NullWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion) {
super(authenticator, protocolVersion);
}
@Override
public int encrypt(byte contentType, ByteBuffer bb) {
// add message authentication code
MAC signer = (MAC)authenticator;
if (signer.macAlg().size != 0) {
addMac(signer, bb, contentType);
} else {
authenticator.increaseSequenceNumber();
}
int len = bb.remaining();
bb.position(bb.limit());
return len;
}
@Override
int getExplicitNonceSize() {
return 0;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
return packetLimit - headerSize - macLen;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
return fragmentSize + headerSize + macLen;
}
@Override
boolean isNullCipher() {
return true;
}
}
}
private static final
class StreamReadCipherGenerator implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new StreamReadCipher(authenticator, protocolVersion,
algorithm, key, params, random);
}
static final class StreamReadCipher extends SSLReadCipher {
private final Cipher cipher;
StreamReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.DECRYPT_MODE, key, params, random);
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
int len = bb.remaining();
int pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
if (len != cipher.update(dup, bb)) {
// catch BouncyCastle buffering error
throw new RuntimeException(
"Unexpected number of plaintext bytes");
}
if (bb.position() != dup.position()) {
throw new RuntimeException(
"Unexpected ByteBuffer position");
}
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
bb.position(pos);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext after DECRYPTION", bb.duplicate());
}
MAC signer = (MAC)authenticator;
if (signer.macAlg().size != 0) {
checkStreamMac(signer, bb, contentType, sequence);
} else {
authenticator.increaseSequenceNumber();
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
return packetSize - headerSize - macLen;
}
}
}
private static final
class StreamWriteCipherGenerator implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new StreamWriteCipher(authenticator,
protocolVersion, algorithm, key, params, random);
}
static final class StreamWriteCipher extends SSLWriteCipher {
private final Cipher cipher;
StreamWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.ENCRYPT_MODE, key, params, random);
}
@Override
public int encrypt(byte contentType, ByteBuffer bb) {
// add message authentication code
MAC signer = (MAC)authenticator;
if (signer.macAlg().size != 0) {
addMac(signer, bb, contentType);
} else {
authenticator.increaseSequenceNumber();
}
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.finest(
"Padded plaintext before ENCRYPTION", bb.duplicate());
}
int len = bb.remaining();
ByteBuffer dup = bb.duplicate();
try {
if (len != cipher.update(dup, bb)) {
// catch BouncyCastle buffering error
throw new RuntimeException(
"Unexpected number of plaintext bytes");
}
if (bb.position() != dup.position()) {
throw new RuntimeException(
"Unexpected ByteBuffer position");
}
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
return len;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return 0;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
return packetLimit - headerSize - macLen;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
return fragmentSize + headerSize + macLen;
}
}
}
private static final
class T10BlockReadCipherGenerator implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new BlockReadCipher(authenticator,
protocolVersion, algorithm, key, params, random);
}
static final class BlockReadCipher extends SSLReadCipher {
private final Cipher cipher;
BlockReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.DECRYPT_MODE, key, params, random);
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
BadPaddingException reservedBPE = null;
// sanity check length of the ciphertext
MAC signer = (MAC)authenticator;
int cipheredLength = bb.remaining();
int tagLen = signer.macAlg().size;
if (tagLen != 0) {
if (!sanityCheck(tagLen, bb.remaining())) {
reservedBPE = new BadPaddingException(
"ciphertext sanity check failed");
}
}
// decryption
int len = bb.remaining();
int pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
if (len != cipher.update(dup, bb)) {
// catch BouncyCastle buffering error
throw new RuntimeException(
"Unexpected number of plaintext bytes");
}
if (bb.position() != dup.position()) {
throw new RuntimeException(
"Unexpected ByteBuffer position");
}
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Padded plaintext after DECRYPTION",
bb.duplicate().position(pos));
}
// remove the block padding
int blockSize = cipher.getBlockSize();
bb.position(pos);
try {
removePadding(bb, tagLen, blockSize, protocolVersion);
} catch (BadPaddingException bpe) {
if (reservedBPE == null) {
reservedBPE = bpe;
}
}
// Requires message authentication code for null, stream and
// block cipher suites.
try {
if (tagLen != 0) {
checkCBCMac(signer, bb,
contentType, cipheredLength, sequence);
} else {
authenticator.increaseSequenceNumber();
}
} catch (BadPaddingException bpe) {
if (reservedBPE == null) {
reservedBPE = bpe;
}
}
// Is it a failover?
if (reservedBPE != null) {
throw reservedBPE;
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
// No padding for a maximum fragment.
//
// 1 byte padding length field: 0x00
return packetSize - headerSize - macLen - 1;
}
/**
* Sanity check the length of a fragment before decryption.
*
* In CBC mode, check that the fragment length is one or multiple
* times of the block size of the cipher suite, and is at least
* one (one is the smallest size of padding in CBC mode) bigger
* than the tag size of the MAC algorithm except the explicit IV
* size for TLS 1.1 or later.
*
* In non-CBC mode, check that the fragment length is not less than
* the tag size of the MAC algorithm.
*
* @return true if the length of a fragment matches above
* requirements
*/
private boolean sanityCheck(int tagLen, int fragmentLen) {
int blockSize = cipher.getBlockSize();
if ((fragmentLen % blockSize) == 0) {
int minimal = tagLen + 1;
minimal = (minimal >= blockSize) ? minimal : blockSize;
return (fragmentLen >= minimal);
}
return false;
}
}
}
private static final
class T10BlockWriteCipherGenerator implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new BlockWriteCipher(authenticator,
protocolVersion, algorithm, key, params, random);
}
static final class BlockWriteCipher extends SSLWriteCipher {
private final Cipher cipher;
BlockWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.ENCRYPT_MODE, key, params, random);
}
@Override
public int encrypt(byte contentType, ByteBuffer bb) {
int pos = bb.position();
// add message authentication code
MAC signer = (MAC)authenticator;
if (signer.macAlg().size != 0) {
addMac(signer, bb, contentType);
} else {
authenticator.increaseSequenceNumber();
}
int blockSize = cipher.getBlockSize();
int len = addPadding(bb, blockSize);
bb.position(pos);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Padded plaintext before ENCRYPTION",
bb.duplicate());
}
ByteBuffer dup = bb.duplicate();
try {
if (len != cipher.update(dup, bb)) {
// catch BouncyCastle buffering error
throw new RuntimeException(
"Unexpected number of plaintext bytes");
}
if (bb.position() != dup.position()) {
throw new RuntimeException(
"Unexpected ByteBuffer position");
}
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
return len;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return 0;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
int blockSize = cipher.getBlockSize();
int fragLen = packetLimit - headerSize;
fragLen -= (fragLen % blockSize); // cannot hold a block
// No padding for a maximum fragment.
fragLen -= 1; // 1 byte padding length field: 0x00
fragLen -= macLen;
return fragLen;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
int blockSize = cipher.getBlockSize();
int paddedLen = fragmentSize + macLen + 1;
if ((paddedLen % blockSize) != 0) {
paddedLen += blockSize - 1;
paddedLen -= paddedLen % blockSize;
}
return headerSize + paddedLen;
}
@Override
boolean isCBCMode() {
return true;
}
}
}
// For TLS 1.1 and 1.2
private static final
class T11BlockReadCipherGenerator implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new BlockReadCipher(authenticator, protocolVersion,
sslCipher, algorithm, key, params, random);
}
static final class BlockReadCipher extends SSLReadCipher {
private final Cipher cipher;
BlockReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
if (params == null) {
params = new IvParameterSpec(new byte[sslCipher.ivSize]);
}
cipher.init(Cipher.DECRYPT_MODE, key, params, random);
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
BadPaddingException reservedBPE = null;
// sanity check length of the ciphertext
MAC signer = (MAC)authenticator;
int cipheredLength = bb.remaining();
int tagLen = signer.macAlg().size;
if (tagLen != 0) {
if (!sanityCheck(tagLen, bb.remaining())) {
reservedBPE = new BadPaddingException(
"ciphertext sanity check failed");
}
}
// decryption
int len = bb.remaining();
int pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
if (len != cipher.update(dup, bb)) {
// catch BouncyCastle buffering error
throw new RuntimeException(
"Unexpected number of plaintext bytes");
}
if (bb.position() != dup.position()) {
throw new RuntimeException(
"Unexpected ByteBuffer position");
}
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Padded plaintext after DECRYPTION",
bb.duplicate().position(pos));
}
// Ignore the explicit nonce.
bb.position(pos + cipher.getBlockSize());
pos = bb.position();
// remove the block padding
int blockSize = cipher.getBlockSize();
bb.position(pos);
try {
removePadding(bb, tagLen, blockSize, protocolVersion);
} catch (BadPaddingException bpe) {
if (reservedBPE == null) {
reservedBPE = bpe;
}
}
// Requires message authentication code for null, stream and
// block cipher suites.
try {
if (tagLen != 0) {
checkCBCMac(signer, bb,
contentType, cipheredLength, sequence);
} else {
authenticator.increaseSequenceNumber();
}
} catch (BadPaddingException bpe) {
if (reservedBPE == null) {
reservedBPE = bpe;
}
}
// Is it a failover?
if (reservedBPE != null) {
throw reservedBPE;
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
// No padding for a maximum fragment.
//
// 1 byte padding length field: 0x00
int nonceSize = cipher.getBlockSize();
return packetSize - headerSize - nonceSize - macLen - 1;
}
/**
* Sanity check the length of a fragment before decryption.
*
* In CBC mode, check that the fragment length is one or multiple
* times of the block size of the cipher suite, and is at least
* one (one is the smallest size of padding in CBC mode) bigger
* than the tag size of the MAC algorithm except the explicit IV
* size for TLS 1.1 or later.
*
* In non-CBC mode, check that the fragment length is not less than
* the tag size of the MAC algorithm.
*
* @return true if the length of a fragment matches above
* requirements
*/
private boolean sanityCheck(int tagLen, int fragmentLen) {
int blockSize = cipher.getBlockSize();
if ((fragmentLen % blockSize) == 0) {
int minimal = tagLen + 1;
minimal = (minimal >= blockSize) ? minimal : blockSize;
minimal += blockSize;
return (fragmentLen >= minimal);
}
return false;
}
}
}
// For TLS 1.1 and 1.2
private static final
class T11BlockWriteCipherGenerator implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new BlockWriteCipher(authenticator, protocolVersion,
sslCipher, algorithm, key, params, random);
}
static final class BlockWriteCipher extends SSLWriteCipher {
private final Cipher cipher;
private final SecureRandom random;
BlockWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.random = random;
if (params == null) {
params = new IvParameterSpec(new byte[sslCipher.ivSize]);
}
cipher.init(Cipher.ENCRYPT_MODE, key, params, random);
}
@Override
public int encrypt(byte contentType, ByteBuffer bb) {
// To be unique and aware of overflow-wrap, sequence number
// is used as the nonce_explicit of block cipher suites.
int pos = bb.position();
// add message authentication code
MAC signer = (MAC)authenticator;
if (signer.macAlg().size != 0) {
addMac(signer, bb, contentType);
} else {
authenticator.increaseSequenceNumber();
}
// DON'T WORRY, the nonce spaces are considered already.
byte[] nonce = new byte[cipher.getBlockSize()];
random.nextBytes(nonce);
pos = pos - nonce.length;
bb.position(pos);
bb.put(nonce);
bb.position(pos);
int blockSize = cipher.getBlockSize();
int len = addPadding(bb, blockSize);
bb.position(pos);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Padded plaintext before ENCRYPTION",
bb.duplicate());
}
ByteBuffer dup = bb.duplicate();
try {
if (len != cipher.update(dup, bb)) {
// catch BouncyCastle buffering error
throw new RuntimeException(
"Unexpected number of plaintext bytes");
}
if (bb.position() != dup.position()) {
throw new RuntimeException(
"Unexpected ByteBuffer position");
}
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
return len;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return cipher.getBlockSize();
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
int blockSize = cipher.getBlockSize();
int fragLen = packetLimit - headerSize - blockSize;
fragLen -= (fragLen % blockSize); // cannot hold a block
// No padding for a maximum fragment.
fragLen -= 1; // 1 byte padding length field: 0x00
fragLen -= macLen;
return fragLen;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
int macLen = ((MAC)authenticator).macAlg().size;
int blockSize = cipher.getBlockSize();
int paddedLen = fragmentSize + macLen + 1;
if ((paddedLen % blockSize) != 0) {
paddedLen += blockSize - 1;
paddedLen -= paddedLen % blockSize;
}
return headerSize + blockSize + paddedLen;
}
@Override
boolean isCBCMode() {
return true;
}
}
}
private static final
class T12GcmReadCipherGenerator implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new GcmReadCipher(authenticator, protocolVersion, sslCipher,
algorithm, key, params, random);
}
static final class GcmReadCipher extends SSLReadCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] fixedIv;
private final int recordIvSize;
private final SecureRandom random;
GcmReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.fixedIv = ((IvParameterSpec)params).getIV();
this.recordIvSize = sslCipher.ivSize - sslCipher.fixedIvSize;
this.random = random;
// DON'T initialize the cipher for AEAD!
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
if (bb.remaining() < (recordIvSize + tagSize)) {
throw new BadPaddingException(
"Insufficient buffer remaining for AEAD cipher " +
"fragment (" + bb.remaining() + "). Needs to be " +
"more than or equal to IV size (" + recordIvSize +
") + tag size (" + tagSize + ")");
}
// initialize the AEAD cipher for the unique IV
byte[] iv = Arrays.copyOf(fixedIv,
fixedIv.length + recordIvSize);
bb.get(iv, fixedIv.length, recordIvSize);
GCMParameterSpec spec = new GCMParameterSpec(tagSize * 8, iv);
try {
cipher.init(Cipher.DECRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in GCM mode", ikae);
}
// update the additional authentication data
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, bb.remaining() - tagSize,
sequence);
cipher.updateAAD(aad);
// DON'T decrypt the nonce_explicit for AEAD mode. The buffer
// position has moved out of the nonce_explicit range.
int len, pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode \"" + ibse.getMessage() +
" \"in JCE provider " + cipher.getProvider().getName());
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
// reset the limit to the end of the decrypted data
bb.position(pos);
bb.limit(pos + len);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext after DECRYPTION", bb.duplicate());
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
return packetSize - headerSize - recordIvSize - tagSize;
}
}
}
private static final
class T12GcmWriteCipherGenerator implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator,
ProtocolVersion protocolVersion, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new GcmWriteCipher(authenticator, protocolVersion, sslCipher,
algorithm, key, params, random);
}
private static final class GcmWriteCipher extends SSLWriteCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] fixedIv;
private final int recordIvSize;
private final SecureRandom random;
GcmWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.fixedIv = ((IvParameterSpec)params).getIV();
this.recordIvSize = sslCipher.ivSize - sslCipher.fixedIvSize;
this.random = random;
// DON'T initialize the cipher for AEAD!
}
@Override
public int encrypt(byte contentType,
ByteBuffer bb) {
// To be unique and aware of overflow-wrap, sequence number
// is used as the nonce_explicit of AEAD cipher suites.
byte[] nonce = authenticator.sequenceNumber();
// initialize the AEAD cipher for the unique IV
byte[] iv = Arrays.copyOf(fixedIv,
fixedIv.length + nonce.length);
System.arraycopy(nonce, 0, iv, fixedIv.length, nonce.length);
GCMParameterSpec spec = new GCMParameterSpec(tagSize * 8, iv);
try {
cipher.init(Cipher.ENCRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in GCM mode", ikae);
}
// Update the additional authentication data, using the
// implicit sequence number of the authenticator.
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, bb.remaining(), null);
cipher.updateAAD(aad);
// DON'T WORRY, the nonce spaces are considered already.
bb.position(bb.position() - nonce.length);
bb.put(nonce);
// DON'T encrypt the nonce for AEAD mode.
int len, pos = bb.position();
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext before ENCRYPTION",
bb.duplicate());
}
ByteBuffer dup = bb.duplicate();
int outputSize = cipher.getOutputSize(dup.remaining());
if (outputSize > bb.remaining()) {
// Need to expand the limit of the output buffer for
// the authentication tag.
//
// DON'T worry about the buffer's capacity, we have
// reserved space for the authentication tag.
bb.limit(pos + outputSize);
}
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException |
BadPaddingException | ShortBufferException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode in JCE provider " +
cipher.getProvider().getName(), ibse);
}
if (len != outputSize) {
throw new RuntimeException(
"Cipher buffering error in JCE provider " +
cipher.getProvider().getName());
}
return len + nonce.length;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return recordIvSize;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
return packetLimit - headerSize - recordIvSize - tagSize;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
return fragmentSize + headerSize + recordIvSize + tagSize;
}
}
}
private static final
class T13GcmReadCipherGenerator implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new GcmReadCipher(authenticator, protocolVersion, sslCipher,
algorithm, key, params, random);
}
static final class GcmReadCipher extends SSLReadCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] iv;
private final SecureRandom random;
GcmReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.iv = ((IvParameterSpec)params).getIV();
this.random = random;
keyLimitCountdown = cipherLimits.getOrDefault(
algorithm.toUpperCase() + ":" + tag[0], 0L);
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("KeyLimit read side: algorithm = " +
algorithm.toUpperCase() + ":" + tag[0] +
"\ncountdown value = " + keyLimitCountdown);
}
if (keyLimitCountdown > 0) {
keyLimitEnabled = true;
}
// DON'T initialize the cipher for AEAD!
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
// An implementation may receive an unencrypted record of type
// change_cipher_spec consisting of the single byte value 0x01
// at any time after the first ClientHello message has been
// sent or received and before the peer's Finished message has
// been received and MUST simply drop it without further
// processing.
if (contentType == ContentType.CHANGE_CIPHER_SPEC.id) {
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
if (bb.remaining() <= tagSize) {
throw new BadPaddingException(
"Insufficient buffer remaining for AEAD cipher " +
"fragment (" + bb.remaining() + "). Needs to be " +
"more than tag size (" + tagSize + ")");
}
byte[] sn = sequence;
if (sn == null) {
sn = authenticator.sequenceNumber();
}
byte[] nonce = iv.clone();
int offset = nonce.length - sn.length;
for (int i = 0; i < sn.length; i++) {
nonce[offset + i] ^= sn[i];
}
// initialize the AEAD cipher for the unique IV
GCMParameterSpec spec =
new GCMParameterSpec(tagSize * 8, nonce);
try {
cipher.init(Cipher.DECRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in GCM mode", ikae);
}
// Update the additional authentication data, using the
// implicit sequence number of the authenticator.
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, bb.remaining(), sn);
cipher.updateAAD(aad);
int len, pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode \"" + ibse.getMessage() +
" \"in JCE provider " + cipher.getProvider().getName());
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
// reset the limit to the end of the decrypted data
bb.position(pos);
bb.limit(pos + len);
// remove inner plaintext padding
int i = bb.limit() - 1;
for (; i > 0 && bb.get(i) == 0; i--) {
// blank
}
if (i < (pos + 1)) {
throw new BadPaddingException(
"Incorrect inner plaintext: no content type");
}
contentType = bb.get(i);
bb.limit(i);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext after DECRYPTION", bb.duplicate());
}
if (keyLimitEnabled) {
keyLimitCountdown -= len;
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
return packetSize - headerSize - tagSize;
}
}
}
private static final
class T13GcmWriteCipherGenerator implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new GcmWriteCipher(authenticator, protocolVersion, sslCipher,
algorithm, key, params, random);
}
private static final class GcmWriteCipher extends SSLWriteCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] iv;
private final SecureRandom random;
GcmWriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.iv = ((IvParameterSpec)params).getIV();
this.random = random;
keyLimitCountdown = cipherLimits.getOrDefault(
algorithm.toUpperCase() + ":" + tag[0], 0L);
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("KeyLimit write side: algorithm = "
+ algorithm.toUpperCase() + ":" + tag[0] +
"\ncountdown value = " + keyLimitCountdown);
}
if (keyLimitCountdown > 0) {
keyLimitEnabled = true;
}
// DON'T initialize the cipher for AEAD!
}
@Override
public int encrypt(byte contentType,
ByteBuffer bb) {
byte[] sn = authenticator.sequenceNumber();
byte[] nonce = iv.clone();
int offset = nonce.length - sn.length;
for (int i = 0; i < sn.length; i++) {
nonce[offset + i] ^= sn[i];
}
// initialize the AEAD cipher for the unique IV
GCMParameterSpec spec =
new GCMParameterSpec(tagSize * 8, nonce);
try {
cipher.init(Cipher.ENCRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in GCM mode", ikae);
}
// Update the additional authentication data, using the
// implicit sequence number of the authenticator.
int outputSize = cipher.getOutputSize(bb.remaining());
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, outputSize, sn);
cipher.updateAAD(aad);
int len, pos = bb.position();
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext before ENCRYPTION",
bb.duplicate());
}
ByteBuffer dup = bb.duplicate();
if (outputSize > bb.remaining()) {
// Need to expand the limit of the output buffer for
// the authentication tag.
//
// DON'T worry about the buffer's capacity, we have
// reserved space for the authentication tag.
bb.limit(pos + outputSize);
}
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException |
BadPaddingException | ShortBufferException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode in JCE provider " +
cipher.getProvider().getName(), ibse);
}
if (len != outputSize) {
throw new RuntimeException(
"Cipher buffering error in JCE provider " +
cipher.getProvider().getName());
}
if (keyLimitEnabled) {
keyLimitCountdown -= len;
}
return len;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return 0;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
return packetLimit - headerSize - tagSize;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
return fragmentSize + headerSize + tagSize;
}
}
}
private static final class T12CC20P1305ReadCipherGenerator
implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new CC20P1305ReadCipher(authenticator, protocolVersion,
sslCipher, algorithm, key, params, random);
}
static final class CC20P1305ReadCipher extends SSLReadCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] iv;
private final SecureRandom random;
CC20P1305ReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.iv = ((IvParameterSpec)params).getIV();
this.random = random;
// DON'T initialize the cipher for AEAD!
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
if (bb.remaining() <= tagSize) {
throw new BadPaddingException(
"Insufficient buffer remaining for AEAD cipher " +
"fragment (" + bb.remaining() + "). Needs to be " +
"more than tag size (" + tagSize + ")");
}
byte[] sn = sequence;
if (sn == null) {
sn = authenticator.sequenceNumber();
}
byte[] nonce = new byte[iv.length];
System.arraycopy(sn, 0, nonce, nonce.length - sn.length,
sn.length);
for (int i = 0; i < nonce.length; i++) {
nonce[i] ^= iv[i];
}
// initialize the AEAD cipher with the unique IV
AlgorithmParameterSpec spec = new IvParameterSpec(nonce);
try {
cipher.init(Cipher.DECRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in AEAD mode", ikae);
}
// update the additional authentication data
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, bb.remaining() - tagSize, sequence);
cipher.updateAAD(aad);
// DON'T decrypt the nonce_explicit for AEAD mode. The buffer
// position has moved out of the nonce_explicit range.
int len;
int pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode \"" + ibse.getMessage() +
" \"in JCE provider " + cipher.getProvider().getName());
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
// reset the limit to the end of the decrypted data
bb.position(pos);
bb.limit(pos + len);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext after DECRYPTION", bb.duplicate());
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
return packetSize - headerSize - tagSize;
}
}
}
private static final class T12CC20P1305WriteCipherGenerator
implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new CC20P1305WriteCipher(authenticator, protocolVersion,
sslCipher, algorithm, key, params, random);
}
private static final class CC20P1305WriteCipher extends SSLWriteCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] iv;
private final SecureRandom random;
CC20P1305WriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.iv = ((IvParameterSpec)params).getIV();
this.random = random;
keyLimitCountdown = cipherLimits.getOrDefault(
algorithm.toUpperCase() + ":" + tag[0], 0L);
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("algorithm = " + algorithm.toUpperCase() +
":" + tag[0] + "\ncountdown value = " +
keyLimitCountdown);
}
if (keyLimitCountdown > 0) {
keyLimitEnabled = true;
}
// DON'T initialize the cipher for AEAD!
}
@Override
public int encrypt(byte contentType,
ByteBuffer bb) {
byte[] sn = authenticator.sequenceNumber();
byte[] nonce = new byte[iv.length];
System.arraycopy(sn, 0, nonce, nonce.length - sn.length,
sn.length);
for (int i = 0; i < nonce.length; i++) {
nonce[i] ^= iv[i];
}
// initialize the AEAD cipher for the unique IV
AlgorithmParameterSpec spec = new IvParameterSpec(nonce);
try {
cipher.init(Cipher.ENCRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in AEAD mode", ikae);
}
// Update the additional authentication data, using the
// implicit sequence number of the authenticator.
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, bb.remaining(), null);
cipher.updateAAD(aad);
// DON'T encrypt the nonce for AEAD mode.
int pos = bb.position();
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext before ENCRYPTION",
bb.duplicate());
}
ByteBuffer dup = bb.duplicate();
int outputSize = cipher.getOutputSize(dup.remaining());
if (outputSize > bb.remaining()) {
// Need to expand the limit of the output buffer for
// the authentication tag.
//
// DON'T worry about the buffer's capacity, we have
// reserved space for the authentication tag.
bb.limit(pos + outputSize);
}
int len;
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException |
BadPaddingException | ShortBufferException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode in JCE provider " +
cipher.getProvider().getName(), ibse);
}
if (len != outputSize) {
throw new RuntimeException(
"Cipher buffering error in JCE provider " +
cipher.getProvider().getName());
}
return len;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return 0;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
return packetLimit - headerSize - tagSize;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
return fragmentSize + headerSize + tagSize;
}
}
}
private static final class T13CC20P1305ReadCipherGenerator
implements ReadCipherGenerator {
@Override
public SSLReadCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new CC20P1305ReadCipher(authenticator, protocolVersion,
sslCipher, algorithm, key, params, random);
}
static final class CC20P1305ReadCipher extends SSLReadCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] iv;
private final SecureRandom random;
CC20P1305ReadCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.iv = ((IvParameterSpec)params).getIV();
this.random = random;
// DON'T initialize the cipher for AEAD!
}
@Override
public Plaintext decrypt(byte contentType, ByteBuffer bb,
byte[] sequence) throws GeneralSecurityException {
// An implementation may receive an unencrypted record of type
// change_cipher_spec consisting of the single byte value 0x01
// at any time after the first ClientHello message has been
// sent or received and before the peer's Finished message has
// been received and MUST simply drop it without further
// processing.
if (contentType == ContentType.CHANGE_CIPHER_SPEC.id) {
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
if (bb.remaining() <= tagSize) {
throw new BadPaddingException(
"Insufficient buffer remaining for AEAD cipher " +
"fragment (" + bb.remaining() + "). Needs to be " +
"more than tag size (" + tagSize + ")");
}
byte[] sn = sequence;
if (sn == null) {
sn = authenticator.sequenceNumber();
}
byte[] nonce = new byte[iv.length];
System.arraycopy(sn, 0, nonce, nonce.length - sn.length,
sn.length);
for (int i = 0; i < nonce.length; i++) {
nonce[i] ^= iv[i];
}
// initialize the AEAD cipher with the unique IV
AlgorithmParameterSpec spec = new IvParameterSpec(nonce);
try {
cipher.init(Cipher.DECRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in AEAD mode", ikae);
}
// Update the additional authentication data, using the
// implicit sequence number of the authenticator.
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, bb.remaining(), sn);
cipher.updateAAD(aad);
int len;
int pos = bb.position();
ByteBuffer dup = bb.duplicate();
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode \"" + ibse.getMessage() +
" \"in JCE provider " + cipher.getProvider().getName());
} catch (ShortBufferException sbe) {
// catch BouncyCastle buffering error
throw new RuntimeException("Cipher buffering error in " +
"JCE provider " + cipher.getProvider().getName(), sbe);
}
// reset the limit to the end of the decrypted data
bb.position(pos);
bb.limit(pos + len);
// remove inner plaintext padding
int i = bb.limit() - 1;
for (; i > 0 && bb.get(i) == 0; i--) {
// blank
}
if (i < (pos + 1)) {
throw new BadPaddingException(
"Incorrect inner plaintext: no content type");
}
contentType = bb.get(i);
bb.limit(i);
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext after DECRYPTION", bb.duplicate());
}
return new Plaintext(contentType,
ProtocolVersion.NONE.major, ProtocolVersion.NONE.minor,
-1, -1L, bb.slice());
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int estimateFragmentSize(int packetSize, int headerSize) {
return packetSize - headerSize - tagSize;
}
}
}
private static final class T13CC20P1305WriteCipherGenerator
implements WriteCipherGenerator {
@Override
public SSLWriteCipher createCipher(SSLCipher sslCipher,
Authenticator authenticator, ProtocolVersion protocolVersion,
String algorithm, Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
return new CC20P1305WriteCipher(authenticator, protocolVersion,
sslCipher, algorithm, key, params, random);
}
private static final class CC20P1305WriteCipher extends SSLWriteCipher {
private final Cipher cipher;
private final int tagSize;
private final Key key;
private final byte[] iv;
private final SecureRandom random;
CC20P1305WriteCipher(Authenticator authenticator,
ProtocolVersion protocolVersion,
SSLCipher sslCipher, String algorithm,
Key key, AlgorithmParameterSpec params,
SecureRandom random) throws GeneralSecurityException {
super(authenticator, protocolVersion);
this.cipher = Cipher.getInstance(algorithm);
this.tagSize = sslCipher.tagSize;
this.key = key;
this.iv = ((IvParameterSpec)params).getIV();
this.random = random;
keyLimitCountdown = cipherLimits.getOrDefault(
algorithm.toUpperCase() + ":" + tag[0], 0L);
if (SSLLogger.isOn && SSLLogger.isOn("ssl")) {
SSLLogger.fine("algorithm = " + algorithm.toUpperCase() +
":" + tag[0] + "\ncountdown value = " +
keyLimitCountdown);
}
if (keyLimitCountdown > 0) {
keyLimitEnabled = true;
}
// DON'T initialize the cipher for AEAD!
}
@Override
public int encrypt(byte contentType,
ByteBuffer bb) {
byte[] sn = authenticator.sequenceNumber();
byte[] nonce = new byte[iv.length];
System.arraycopy(sn, 0, nonce, nonce.length - sn.length,
sn.length);
for (int i = 0; i < nonce.length; i++) {
nonce[i] ^= iv[i];
}
// initialize the AEAD cipher for the unique IV
AlgorithmParameterSpec spec = new IvParameterSpec(nonce);
try {
cipher.init(Cipher.ENCRYPT_MODE, key, spec, random);
} catch (InvalidKeyException |
InvalidAlgorithmParameterException ikae) {
// unlikely to happen
throw new RuntimeException(
"invalid key or spec in AEAD mode", ikae);
}
// Update the additional authentication data, using the
// implicit sequence number of the authenticator.
int outputSize = cipher.getOutputSize(bb.remaining());
byte[] aad = authenticator.acquireAuthenticationBytes(
contentType, outputSize, sn);
cipher.updateAAD(aad);
int pos = bb.position();
if (SSLLogger.isOn && SSLLogger.isOn("plaintext")) {
SSLLogger.fine(
"Plaintext before ENCRYPTION",
bb.duplicate());
}
ByteBuffer dup = bb.duplicate();
if (outputSize > bb.remaining()) {
// Need to expand the limit of the output buffer for
// the authentication tag.
//
// DON'T worry about the buffer's capacity, we have
// reserved space for the authentication tag.
bb.limit(pos + outputSize);
}
int len;
try {
len = cipher.doFinal(dup, bb);
} catch (IllegalBlockSizeException |
BadPaddingException | ShortBufferException ibse) {
// unlikely to happen
throw new RuntimeException(
"Cipher error in AEAD mode in JCE provider " +
cipher.getProvider().getName(), ibse);
}
if (len != outputSize) {
throw new RuntimeException(
"Cipher buffering error in JCE provider " +
cipher.getProvider().getName());
}
if (keyLimitEnabled) {
keyLimitCountdown -= len;
}
return len;
}
@Override
void dispose() {
if (cipher != null) {
try {
cipher.doFinal();
} catch (Exception e) {
// swallow all types of exceptions.
}
}
}
@Override
int getExplicitNonceSize() {
return 0;
}
@Override
int calculateFragmentSize(int packetLimit, int headerSize) {
return packetLimit - headerSize - tagSize;
}
@Override
int calculatePacketSize(int fragmentSize, int headerSize) {
return fragmentSize + headerSize + tagSize;
}
}
}
private static void addMac(MAC signer,
ByteBuffer destination, byte contentType) {
if (signer.macAlg().size != 0) {
int dstContent = destination.position();
byte[] hash = signer.compute(contentType, destination, false);
/*
* position was advanced to limit in MAC compute above.
*
* Mark next area as writable (above layers should have
* established that we have plenty of room), then write
* out the hash.
*/
destination.limit(destination.limit() + hash.length);
destination.put(hash);
// reset the position and limit
destination.position(dstContent);
}
}
// for null and stream cipher
private static void checkStreamMac(MAC signer, ByteBuffer bb,
byte contentType, byte[] sequence) throws BadPaddingException {
int tagLen = signer.macAlg().size;
// Requires message authentication code for null, stream and
// block cipher suites.
if (tagLen != 0) {
int contentLen = bb.remaining() - tagLen;
if (contentLen < 0) {
throw new BadPaddingException("bad record");
}
// Run MAC computation and comparison on the payload.
//
// MAC data would be stripped off during the check.
if (checkMacTags(contentType, bb, signer, sequence, false)) {
throw new BadPaddingException("bad record MAC");
}
}
}
// for CBC cipher
private static void checkCBCMac(MAC signer, ByteBuffer bb,
byte contentType, int cipheredLength,
byte[] sequence) throws BadPaddingException {
BadPaddingException reservedBPE = null;
int tagLen = signer.macAlg().size;
int pos = bb.position();
if (tagLen != 0) {
int contentLen = bb.remaining() - tagLen;
if (contentLen < 0) {
reservedBPE = new BadPaddingException("bad record");
// set offset of the dummy MAC
contentLen = cipheredLength - tagLen;
bb.limit(pos + cipheredLength);
}
// Run MAC computation and comparison on the payload.
//
// MAC data would be stripped off during the check.
if (checkMacTags(contentType, bb, signer, sequence, false)) {
if (reservedBPE == null) {
reservedBPE =
new BadPaddingException("bad record MAC");
}
}
// Run MAC computation and comparison on the remainder.
int remainingLen = calculateRemainingLen(
signer, cipheredLength, contentLen);
// NOTE: remainingLen may be bigger (less than 1 block of the
// hash algorithm of the MAC) than the cipheredLength.
//
// Is it possible to use a static buffer, rather than allocate
// it dynamically?
remainingLen += signer.macAlg().size;
ByteBuffer temporary = ByteBuffer.allocate(remainingLen);
// Won't need to worry about the result on the remainder. And
// then we won't need to worry about what's actual data to
// check MAC tag on. We start the check from the header of the
// buffer so that we don't need to construct a new byte buffer.
checkMacTags(contentType, temporary, signer, sequence, true);
}
// Is it a failover?
if (reservedBPE != null) {
throw reservedBPE;
}
}
/*
* Run MAC computation and comparison
*/
private static boolean checkMacTags(byte contentType, ByteBuffer bb,
MAC signer, byte[] sequence, boolean isSimulated) {
int tagLen = signer.macAlg().size;
int position = bb.position();
int lim = bb.limit();
int macOffset = lim - tagLen;
bb.limit(macOffset);
byte[] hash = signer.compute(contentType, bb, sequence, isSimulated);
if (hash == null || tagLen != hash.length) {
// Something is wrong with MAC implementation.
throw new RuntimeException("Internal MAC error");
}
bb.position(macOffset);
bb.limit(lim);
try {
int[] results = compareMacTags(bb, hash);
return (results[0] != 0);
} finally {
// reset to the data
bb.position(position);
bb.limit(macOffset);
}
}
/*
* A constant-time comparison of the MAC tags.
*
* Please DON'T change the content of the ByteBuffer parameter!
*/
private static int[] compareMacTags(ByteBuffer bb, byte[] tag) {
// An array of hits is used to prevent Hotspot optimization for
// the purpose of a constant-time check.
int[] results = {0, 0}; // {missed #, matched #}
// The caller ensures there are enough bytes available in the buffer.
// So we won't need to check the remaining of the buffer.
for (byte t : tag) {
if (bb.get() != t) {
results[0]++; // mismatched bytes
} else {
results[1]++; // matched bytes
}
}
return results;
}
/*
* Calculate the length of a dummy buffer to run MAC computation
* and comparison on the remainder.
*
* The caller MUST ensure that the fullLen is not less than usedLen.
*/
private static int calculateRemainingLen(
MAC signer, int fullLen, int usedLen) {
int blockLen = signer.macAlg().hashBlockSize;
int minimalPaddingLen = signer.macAlg().minimalPaddingSize;
// (blockLen - minimalPaddingLen) is the maximum message size of
// the last block of hash function operation. See FIPS 180-4, or
// MD5 specification.
fullLen += 13 - (blockLen - minimalPaddingLen);
usedLen += 13 - (blockLen - minimalPaddingLen);
// Note: fullLen is always not less than usedLen, and blockLen
// is always bigger than minimalPaddingLen, so we don't worry
// about negative values. 0x01 is added to the result to ensure
// that the return value is positive. The extra one byte does
// not impact the overall MAC compression function evaluations.
return 0x01 + (int)(Math.ceil(fullLen/(1.0d * blockLen)) -
Math.ceil(usedLen/(1.0d * blockLen))) * blockLen;
}
private static int addPadding(ByteBuffer bb, int blockSize) {
int len = bb.remaining();
int offset = bb.position();
int newlen = len + 1;
byte pad;
int i;
if ((newlen % blockSize) != 0) {
newlen += blockSize - 1;
newlen -= newlen % blockSize;
}
pad = (byte) (newlen - len);
/*
* Update the limit to what will be padded.
*/
bb.limit(newlen + offset);
/*
* TLS version of the padding works for both SSLv3 and TLSv1
*/
for (i = 0, offset += len; i < pad; i++) {
bb.put(offset++, (byte) (pad - 1));
}
bb.position(offset);
bb.limit(offset);
return newlen;
}
private static int removePadding(ByteBuffer bb,
int tagLen, int blockSize,
ProtocolVersion protocolVersion) throws BadPaddingException {
int len = bb.remaining();
int offset = bb.position();
// last byte is length byte (i.e. actual padding length - 1)
int padOffset = offset + len - 1;
int padLen = bb.get(padOffset) & 0xFF;
int newLen = len - (padLen + 1);
if ((newLen - tagLen) < 0) {
// If the buffer is not long enough to contain the padding plus
// a MAC tag, do a dummy constant-time padding check.
//
// Note that it is a dummy check, so we won't care about what is
// the actual padding data.
checkPadding(bb.duplicate(), (byte)(padLen & 0xFF));
throw new BadPaddingException("Invalid Padding length: " + padLen);
}
// The padding data should be filled with the padding length value.
int[] results = checkPadding(
bb.duplicate().position(offset + newLen),
(byte)(padLen & 0xFF));
if (protocolVersion.useTLS10PlusSpec()) {
if (results[0] != 0) { // padding data has invalid bytes
throw new BadPaddingException("Invalid TLS padding data");
}
} else { // SSLv3
// SSLv3 requires 0 <= length byte < block size
// some implementations do 1 <= length byte <= block size,
// so accept that as well
// v3 does not require any particular value for the other bytes
if (padLen > blockSize) {
throw new BadPaddingException("Padding length (" +
padLen + ") of SSLv3 message should not be bigger " +
"than the block size (" + blockSize + ")");
}
}
// Reset buffer limit to remove padding.
bb.limit(offset + newLen);
return newLen;
}
/*
* A constant-time check of the padding.
*
* NOTE that we are checking both the padding and the padLen bytes here.
*
* The caller MUST ensure that the bb parameter has remaining.
*/
private static int[] checkPadding(ByteBuffer bb, byte pad) {
if (!bb.hasRemaining()) {
throw new RuntimeException("hasRemaining() must be positive");
}
// An array of hits is used to prevent Hotspot optimization for
// the purpose of a constant-time check.
int[] results = {0, 0}; // {missed #, matched #}
bb.mark();
for (int i = 0; i <= 256; bb.reset()) {
for (; bb.hasRemaining() && i <= 256; i++) {
if (bb.get() != pad) {
results[0]++; // mismatched padding data
} else {
results[1]++; // matched padding data
}
}
}
return results;
}
}