diff options
Diffstat (limited to 'gnu/javax/net/ssl/provider/AbstractHandshake.java')
| -rw-r--r-- | gnu/javax/net/ssl/provider/AbstractHandshake.java | 1205 |
1 files changed, 1205 insertions, 0 deletions
diff --git a/gnu/javax/net/ssl/provider/AbstractHandshake.java b/gnu/javax/net/ssl/provider/AbstractHandshake.java new file mode 100644 index 000000000..d80a5bb78 --- /dev/null +++ b/gnu/javax/net/ssl/provider/AbstractHandshake.java @@ -0,0 +1,1205 @@ +/* AbstractHandshake.java -- abstract handshake handler. + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is a part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at +your option) any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 +USA + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.javax.net.ssl.provider; + +import gnu.classpath.debug.Component; +import gnu.classpath.debug.SystemLogger; +import gnu.java.security.action.GetSecurityPropertyAction; +import gnu.java.security.prng.IRandom; +import gnu.java.security.prng.LimitReachedException; +import gnu.java.security.util.ByteArray; +import gnu.javax.security.auth.callback.CertificateCallback; +import gnu.javax.security.auth.callback.DefaultCallbackHandler; + +import java.nio.ByteBuffer; +import java.security.AccessController; +import java.security.DigestException; +import java.security.InvalidAlgorithmParameterException; +import java.security.InvalidKeyException; +import java.security.KeyManagementException; +import java.security.MessageDigest; +import java.security.NoSuchAlgorithmException; +import java.security.PrivilegedExceptionAction; +import java.security.SecureRandom; +import java.security.cert.CertificateException; +import java.security.cert.X509Certificate; +import java.util.Arrays; +import java.util.HashMap; +import java.util.LinkedList; +import java.util.zip.Deflater; +import java.util.zip.Inflater; + +import javax.crypto.Cipher; +import javax.crypto.KeyAgreement; +import javax.crypto.Mac; +import javax.crypto.NoSuchPaddingException; +import javax.crypto.SecretKey; +import javax.crypto.interfaces.DHPrivateKey; +import javax.crypto.interfaces.DHPublicKey; +import javax.crypto.spec.IvParameterSpec; +import javax.crypto.spec.SecretKeySpec; +import javax.net.ssl.SSLEngineResult; +import javax.net.ssl.SSLException; +import javax.net.ssl.X509TrustManager; +import javax.net.ssl.SSLEngineResult.HandshakeStatus; +import javax.security.auth.callback.Callback; +import javax.security.auth.callback.CallbackHandler; +import javax.security.auth.callback.ConfirmationCallback; + +/** + * The base interface for handshake implementations. Concrete + * subclasses of this class (one for the server, one for the client) + * handle the HANDSHAKE content-type in communications. + */ +public abstract class AbstractHandshake +{ + protected static final SystemLogger logger = SystemLogger.SYSTEM; + + /** + * "server finished" -- TLS 1.0 and later + */ + protected static final byte[] SERVER_FINISHED + = new byte[] { + 115, 101, 114, 118, 101, 114, 32, 102, 105, 110, 105, 115, + 104, 101, 100 + }; + + /** + * "client finished" -- TLS 1.0 and later + */ + protected static final byte[] CLIENT_FINISHED + = new byte[] { + 99, 108, 105, 101, 110, 116, 32, 102, 105, 110, 105, 115, + 104, 101, 100 + }; + + /** + * "key expansion" -- TLS 1.0 and later + */ + private static final byte[] KEY_EXPANSION = + new byte[] { 107, 101, 121, 32, 101, 120, 112, + 97, 110, 115, 105, 111, 110 }; + + /** + * "master secret" -- TLS 1.0 and later + */ + private static final byte[] MASTER_SECRET + = new byte[] { + 109, 97, 115, 116, 101, 114, 32, 115, 101, 99, 114, 101, 116 + }; + + /** + * "client write key" -- TLS 1.0 exportable whitener. + */ + private static final byte[] CLIENT_WRITE_KEY + = new byte[] { + 99, 108, 105, 101, 110, 116, 32, 119, 114, 105, 116, 101, 32, 107, + 101, 121 + }; + + /** + * "server write key" -- TLS 1.0 exportable whitener. + */ + private static final byte[] SERVER_WRITE_KEY + = new byte[] { + 115, 101, 114, 118, 101, 114, 32, 119, 114, 105, 116, 101, 32, 107, + 101, 121 + }; + + private static final byte[] IV_BLOCK + = new byte[] { + 73, 86, 32, 98, 108, 111, 99, 107 + }; + + /** + * SSL 3.0; the string "CLNT" + */ + private static final byte[] SENDER_CLIENT + = new byte[] { 0x43, 0x4C, 0x4E, 0x54 }; + + /** + * SSL 3.0; the string "SRVR" + */ + private static final byte[] SENDER_SERVER + = new byte[] { 0x53, 0x52, 0x56, 0x52 }; + + /** + * SSL 3.0; the value 0x36 40 (for SHA-1 hashes) or 48 (for MD5 hashes) + * times. + */ + protected static final byte[] PAD1 = new byte[48]; + + /** + * SSL 3.0; the value 0x5c 40 (for SHA-1 hashes) or 48 (for MD5 hashes) + * times. + */ + protected static final byte[] PAD2 = new byte[48]; + + static + { + Arrays.fill(PAD1, SSLHMac.PAD1); + Arrays.fill(PAD2, SSLHMac.PAD2); + } + + /** + * The currently-read handshake messages. There may be zero, or + * multiple, handshake messages in this buffer. + */ + protected ByteBuffer handshakeBuffer; + + /** + * The offset into `handshakeBuffer' where the first unread + * handshake message resides. + */ + protected int handshakeOffset; + + protected MessageDigest sha; + protected MessageDigest md5; + + protected final SSLEngineImpl engine; + protected KeyAgreement keyAgreement; + protected byte[] preMasterSecret; + protected InputSecurityParameters inParams; + protected OutputSecurityParameters outParams; + protected LinkedList<DelegatedTask> tasks; + protected Random serverRandom; + protected Random clientRandom; + protected CompressionMethod compression; + + protected AbstractHandshake(SSLEngineImpl engine) + throws NoSuchAlgorithmException + { + this.engine = engine; + sha = MessageDigest.getInstance("SHA-1"); + md5 = MessageDigest.getInstance("MD5"); + tasks = new LinkedList<DelegatedTask>(); + } + + /** + * Handles the next input message in the handshake. This is called + * in response to a call to {@link javax.net.ssl.SSLEngine#unwrap} + * for a message with content-type HANDSHAKE. + * + * @param record The input record. The callee should not assume that + * the record's buffer is writable, and should not try to use it for + * output or temporary storage. + * @return An {@link SSLEngineResult} describing the result. + */ + public final HandshakeStatus handleInput (ByteBuffer fragment) + throws SSLException + { + if (!tasks.isEmpty()) + return HandshakeStatus.NEED_TASK; + + HandshakeStatus status = status(); + if (status != HandshakeStatus.NEED_UNWRAP) + return status; + + // Try to read another... + if (!pollHandshake(fragment)) + return HandshakeStatus.NEED_UNWRAP; + + while (hasMessage() && status != HandshakeStatus.NEED_WRAP) + { + int pos = handshakeOffset; + status = implHandleInput(); + int len = handshakeOffset - pos; + if (len == 0) + { + // Don't bother; the impl is just telling us to go around + // again. + continue; + } + if (doHash()) + { + if (Debug.DEBUG) + logger.logv(Component.SSL_HANDSHAKE, "hashing output\n{0}", + Util.hexDump((ByteBuffer) handshakeBuffer + .duplicate().position(pos) + .limit(pos+len), " >> ")); + sha.update((ByteBuffer) handshakeBuffer.duplicate() + .position(pos).limit(pos+len)); + md5.update((ByteBuffer) handshakeBuffer.duplicate() + .position(pos).limit(pos+len)); + } + } + return status; + } + + /** + * Called to process more handshake data. This method will be called + * repeatedly while there is remaining handshake data, and while the + * status is + * @return + * @throws SSLException + */ + protected abstract HandshakeStatus implHandleInput() + throws SSLException; + + /** + * Produce more handshake output. This is called in response to a + * call to {@link javax.net.ssl.SSLEngine#wrap}, when the handshake + * is still in progress. + * + * @param record The output record; the callee should put its output + * handshake message (or a part of it) in the argument's + * <code>fragment</code>, and should set the record length + * appropriately. + * @return An {@link SSLEngineResult} describing the result. + */ + public final HandshakeStatus handleOutput (ByteBuffer fragment) + throws SSLException + { + if (!tasks.isEmpty()) + return HandshakeStatus.NEED_TASK; + + int orig = fragment.position(); + SSLEngineResult.HandshakeStatus status = implHandleOutput(fragment); + if (doHash()) + { + if (Debug.DEBUG) + logger.logv(Component.SSL_HANDSHAKE, "hashing output:\n{0}", + Util.hexDump((ByteBuffer) fragment.duplicate().flip().position(orig), " >> ")); + sha.update((ByteBuffer) fragment.duplicate().flip().position(orig)); + md5.update((ByteBuffer) fragment.duplicate().flip().position(orig)); + } + return status; + } + + /** + * Called to implement the underlying output handling. The callee should + * attempt to fill the given buffer as much as it can; this can include + * multiple, and even partial, handshake messages. + * + * @param fragment The buffer the callee should write handshake messages to. + * @return The new status of the handshake. + * @throws SSLException If an error occurs processing the output message. + */ + protected abstract SSLEngineResult.HandshakeStatus implHandleOutput (ByteBuffer fragment) + throws SSLException; + + /** + * Return a new instance of input security parameters, initialized with + * the session key. It is, of course, only valid to invoke this method + * once the handshake is complete, and the session keys established. + * + * <p>In the presence of a well-behaving peer, this should be called once + * the <code>ChangeCipherSpec</code> message is recieved. + * + * @return The input parameters for the newly established session. + * @throws SSLException If the handshake is not complete. + */ + final InputSecurityParameters getInputParams() throws SSLException + { + checkKeyExchange(); + return inParams; + } + + /** + * Return a new instance of output security parameters, initialized with + * the session key. This should be called after the + * <code>ChangeCipherSpec</code> message is sent to the peer. + * + * @return The output parameters for the newly established session. + * @throws SSLException If the handshake is not complete. + */ + final OutputSecurityParameters getOutputParams() throws SSLException + { + checkKeyExchange(); + return outParams; + } + + /** + * Fetch a delegated task waiting to run, if any. + * + * @return The task. + */ + final Runnable getTask() + { + if (tasks.isEmpty()) + return null; + return tasks.removeFirst(); + } + + /** + * Used by the skeletal code to query the current status of the handshake. + * This <em>should</em> be the same value as returned by the previous call + * to {@link #implHandleOutput(ByteBuffer)} or {@link + * #implHandleInput(ByteBuffer)}. + * + * @return The current handshake status. + */ + abstract HandshakeStatus status(); + + /** + * Check if the key exchange completed successfully, throwing an exception + * if not. + * + * <p>Note that we assume that the caller of our SSLEngine is correct, and + * that they did run the delegated tasks that encapsulate the key exchange. + * What we are primarily checking, therefore, is that no error occurred in the + * key exchange operation itself. + * + * @throws SSLException If the key exchange did not complete successfully. + */ + abstract void checkKeyExchange() throws SSLException; + + /** + * Handle an SSLv2 client hello. This is only used by SSL servers. + * + * @param hello The hello message. + */ + abstract void handleV2Hello(ByteBuffer hello) throws SSLException; + + /** + * Attempt to read the next handshake message from the given + * record. If only a partial handshake message is available, then + * this method saves the incoming bytes and returns false. If a + * complete handshake is read, or if there was one buffered in the + * handshake buffer, this method returns true, and `handshakeBuffer' + * can be used to read the handshake. + * + * @param record The input record. + * @return True if a complete handshake is present in the buffer; + * false if only a partial one. + */ + protected boolean pollHandshake (final ByteBuffer fragment) + { + // Allocate space for the new fragment. + if (handshakeBuffer == null + || handshakeBuffer.remaining() < fragment.remaining()) + { + // We need space for anything still unread in the handshake + // buffer... + int len = ((handshakeBuffer == null) ? 0 + : handshakeBuffer.position() - handshakeOffset); + + // Plus room for the incoming record. + len += fragment.remaining(); + reallocateBuffer(len); + } + + if (Debug.DEBUG) + logger.logv(Component.SSL_HANDSHAKE, "inserting {0} into {1}", + fragment, handshakeBuffer); + + // Put the fragment into the buffer. + handshakeBuffer.put(fragment); + + return hasMessage(); + } + + protected boolean doHash() + { + return true; + } + + /** + * Tell if the handshake buffer currently has a full handshake + * message. + */ + protected boolean hasMessage() + { + if (handshakeBuffer == null) + return false; + ByteBuffer tmp = handshakeBuffer.duplicate(); + tmp.flip(); + tmp.position(handshakeOffset); + if (Debug.DEBUG) + logger.logv(Component.SSL_HANDSHAKE, "current buffer: {0}; test buffer {1}", + handshakeBuffer, tmp); + if (tmp.remaining() < 4) + return false; + Handshake handshake = new Handshake(tmp.slice()); + if (Debug.DEBUG) + logger.logv(Component.SSL_HANDSHAKE, "handshake len:{0} remaining:{1}", + handshake.length(), tmp.remaining()); + return (handshake.length() <= tmp.remaining() - 4); + } + + /** + * Reallocate the handshake buffer so it can hold `totalLen' + * bytes. The smallest buffer allocated is 1024 bytes, and the size + * doubles from there until the buffer is sufficiently large. + */ + private void reallocateBuffer (final int totalLen) + { + int len = handshakeBuffer == null ? -1 + : handshakeBuffer.capacity() - (handshakeBuffer.limit() - handshakeOffset); + if (len >= totalLen) + { + // Big enough; no need to reallocate; but maybe shift the contents + // down. + if (handshakeOffset > 0) + { + handshakeBuffer.flip().position(handshakeOffset); + handshakeBuffer.compact(); + handshakeOffset = 0; + } + return; + } + + // Start at 1K (probably the system's page size). Double the size + // from there. + len = 1024; + while (len < totalLen) + len = len << 1; + ByteBuffer newBuf = ByteBuffer.allocate (len); + + // Copy the unread bytes from the old buffer. + if (handshakeBuffer != null) + { + handshakeBuffer.flip (); + handshakeBuffer.position(handshakeOffset); + newBuf.put(handshakeBuffer); + } + handshakeBuffer = newBuf; + + // We just put only unread handshake messages in the new buffer; + // the offset of the next one is now zero. + handshakeOffset = 0; + } + + /** + * Generate a certificate verify message for SSLv3. In SSLv3, a different + * algorithm was used to generate this value was subtly different than + * that used in TLSv1.0 and later. In TLSv1.0 and later, this value is + * just the digest over the handshake messages. + * + * <p>SSLv3 uses the algorithm: + * + * <pre> +CertificateVerify.signature.md5_hash + MD5(master_secret + pad_2 + + MD5(handshake_messages + master_secret + pad_1)); +Certificate.signature.sha_hash + SHA(master_secret + pad_2 + + SHA(handshake_messages + master_secret + pad_1));</pre> + * + * @param md5 The running MD5 hash of the handshake. + * @param sha The running SHA-1 hash of the handshake. + * @param session The current session being negotiated. + * @return The computed to-be-signed value. + */ + protected byte[] genV3CertificateVerify(MessageDigest md5, + MessageDigest sha, + SessionImpl session) + { + byte[] md5value = null; + if (session.suite.signatureAlgorithm() == SignatureAlgorithm.RSA) + { + md5.update(session.privateData.masterSecret); + md5.update(PAD1, 0, 48); + byte[] tmp = md5.digest(); + md5.reset(); + md5.update(session.privateData.masterSecret); + md5.update(PAD2, 0, 48); + md5.update(tmp); + md5value = md5.digest(); + } + + sha.update(session.privateData.masterSecret); + sha.update(PAD1, 0, 40); + byte[] tmp = sha.digest(); + sha.reset(); + sha.update(session.privateData.masterSecret); + sha.update(PAD2, 0, 40); + sha.update(tmp); + byte[] shavalue = sha.digest(); + + if (md5value != null) + return Util.concat(md5value, shavalue); + + return shavalue; + } + + /** + * Generate the session keys from the computed master secret. + * + * @param clientRandom The client's nonce. + * @param serverRandom The server's nonce. + * @param session The session being established. + * @return The derived keys. + */ + protected byte[][] generateKeys(Random clientRandom, Random serverRandom, + SessionImpl session) + { + int maclen = 20; // SHA-1. + if (session.suite.macAlgorithm() == MacAlgorithm.MD5) + maclen = 16; + int ivlen = 0; + if (session.suite.cipherAlgorithm() == CipherAlgorithm.DES + || session.suite.cipherAlgorithm() == CipherAlgorithm.DESede) + ivlen = 8; + if (session.suite.cipherAlgorithm() == CipherAlgorithm.AES) + ivlen = 16; + int keylen = session.suite.keyLength(); + + byte[][] keys = new byte[6][]; + keys[0] = new byte[maclen]; // client_write_MAC_secret + keys[1] = new byte[maclen]; // server_write_MAC_secret + keys[2] = new byte[keylen]; // client_write_key + keys[3] = new byte[keylen]; // server_write_key + keys[4] = new byte[ivlen]; // client_write_iv + keys[5] = new byte[ivlen]; // server_write_iv + + IRandom prf = null; + if (session.version == ProtocolVersion.SSL_3) + { + byte[] seed = new byte[clientRandom.length() + + serverRandom.length()]; + serverRandom.buffer().get(seed, 0, serverRandom.length()); + clientRandom.buffer().get(seed, serverRandom.length(), + clientRandom.length()); + prf = new SSLRandom(); + HashMap<String,byte[]> attr = new HashMap<String,byte[]>(2); + attr.put(SSLRandom.SECRET, session.privateData.masterSecret); + attr.put(SSLRandom.SEED, seed); + prf.init(attr); + } + else + { + byte[] seed = new byte[KEY_EXPANSION.length + + clientRandom.length() + + serverRandom.length()]; + System.arraycopy(KEY_EXPANSION, 0, seed, 0, KEY_EXPANSION.length); + serverRandom.buffer().get(seed, KEY_EXPANSION.length, + serverRandom.length()); + clientRandom.buffer().get(seed, (KEY_EXPANSION.length + + serverRandom.length()), + clientRandom.length()); + + prf = new TLSRandom(); + HashMap<String,byte[]> attr = new HashMap<String,byte[]>(2); + attr.put(TLSRandom.SECRET, session.privateData.masterSecret); + attr.put(TLSRandom.SEED, seed); + prf.init(attr); + } + + try + { + prf.nextBytes(keys[0], 0, keys[0].length); + prf.nextBytes(keys[1], 0, keys[1].length); + prf.nextBytes(keys[2], 0, keys[2].length); + prf.nextBytes(keys[3], 0, keys[3].length); + + if (session.suite.isExportable()) + { + if (session.version == ProtocolVersion.SSL_3) + { + MessageDigest md5 = MessageDigest.getInstance("MD5"); + md5.update(clientRandom.buffer()); + md5.update(serverRandom.buffer()); + byte[] d = md5.digest(); + System.arraycopy(d, 0, keys[4], 0, keys[4].length); + + md5.reset(); + md5.update(serverRandom.buffer()); + md5.update(clientRandom.buffer()); + d = md5.digest(); + System.arraycopy(d, 0, keys[5], 0, keys[5].length); + + md5.reset(); + md5.update(keys[2]); + md5.update(clientRandom.buffer()); + md5.update(serverRandom.buffer()); + keys[2] = Util.trim(md5.digest(), 8); + + md5.reset(); + md5.update(keys[3]); + md5.update(serverRandom.buffer()); + md5.update(clientRandom.buffer()); + keys[3] = Util.trim(md5.digest(), 8); + } + else + { + TLSRandom prf2 = new TLSRandom(); + HashMap<String,byte[]> attr = new HashMap<String,byte[]>(2); + attr.put(TLSRandom.SECRET, keys[2]); + byte[] seed = new byte[CLIENT_WRITE_KEY.length + + clientRandom.length() + + serverRandom.length()]; + System.arraycopy(CLIENT_WRITE_KEY, 0, seed, 0, + CLIENT_WRITE_KEY.length); + clientRandom.buffer().get(seed, CLIENT_WRITE_KEY.length, + clientRandom.length()); + serverRandom.buffer().get(seed, CLIENT_WRITE_KEY.length + + clientRandom.length(), + serverRandom.length()); + attr.put(TLSRandom.SEED, seed); + prf2.init(attr); + keys[2] = new byte[8]; + prf2.nextBytes(keys[2], 0, keys[2].length); + + attr.put(TLSRandom.SECRET, keys[3]); + seed = new byte[SERVER_WRITE_KEY.length + + serverRandom.length() + + clientRandom.length()]; + System.arraycopy(SERVER_WRITE_KEY, 0, seed, 0, + SERVER_WRITE_KEY.length); + serverRandom.buffer().get(seed, SERVER_WRITE_KEY.length, + serverRandom.length()); + clientRandom.buffer().get(seed, SERVER_WRITE_KEY.length + + serverRandom.length(), + + clientRandom.length()); + attr.put(TLSRandom.SEED, seed); + prf2.init(attr); + keys[3] = new byte[8]; + prf2.nextBytes(keys[3], 0, keys[3].length); + + attr.put(TLSRandom.SECRET, new byte[0]); + seed = new byte[IV_BLOCK.length + + clientRandom.length() + + serverRandom.length()]; + System.arraycopy(IV_BLOCK, 0, seed, 0, IV_BLOCK.length); + clientRandom.buffer().get(seed, IV_BLOCK.length, + clientRandom.length()); + serverRandom.buffer().get(seed, IV_BLOCK.length + + clientRandom.length(), + serverRandom.length()); + attr.put(TLSRandom.SEED, seed); + prf2.init(attr); + prf2.nextBytes(keys[4], 0, keys[4].length); + prf2.nextBytes(keys[5], 0, keys[5].length); + } + } + else + { + prf.nextBytes(keys[4], 0, keys[4].length); + prf.nextBytes(keys[5], 0, keys[5].length); + } + } + catch (LimitReachedException lre) + { + // Won't happen with our implementation. + throw new Error(lre); + } + catch (NoSuchAlgorithmException nsae) + { + throw new Error(nsae); + } + + if (Debug.DEBUG_KEY_EXCHANGE) + logger.logv(Component.SSL_KEY_EXCHANGE, + "keys generated;\n [0]: {0}\n [1]: {1}\n [2]: {2}\n" + + " [3]: {3}\n [4]: {4}\n [5]: {5}", + Util.toHexString(keys[0], ':'), + Util.toHexString(keys[1], ':'), + Util.toHexString(keys[2], ':'), + Util.toHexString(keys[3], ':'), + Util.toHexString(keys[4], ':'), + Util.toHexString(keys[5], ':')); + return keys; + } + + /** + * Generate a "finished" message. The hashes passed in are modified + * by this function, so they should be clone copies of the digest if + * the hash function needs to be used more. + * + * @param md5 The MD5 computation. + * @param sha The SHA-1 computation. + * @param isClient Whether or not the client-side finished message is + * being computed. + * @param session The current session. + * @return A byte buffer containing the computed finished message. + */ + protected ByteBuffer generateFinished(MessageDigest md5, + MessageDigest sha, + boolean isClient, + SessionImpl session) + { + ByteBuffer finishedBuffer = null; + if (session.version.compareTo(ProtocolVersion.TLS_1) >= 0) + { + finishedBuffer = ByteBuffer.allocate(12); + TLSRandom prf = new TLSRandom(); + byte[] md5val = md5.digest(); + byte[] shaval = sha.digest(); + if (Debug.DEBUG) + logger.logv(Component.SSL_HANDSHAKE, "finished md5:{0} sha:{1}", + Util.toHexString(md5val, ':'), + Util.toHexString(shaval, ':')); + byte[] seed = new byte[CLIENT_FINISHED.length + + md5val.length + + shaval.length]; + if (isClient) + System.arraycopy(CLIENT_FINISHED, 0, seed, 0, CLIENT_FINISHED.length); + else + System.arraycopy(SERVER_FINISHED, 0, seed, 0, SERVER_FINISHED.length); + System.arraycopy(md5val, 0, + seed, CLIENT_FINISHED.length, + md5val.length); + System.arraycopy(shaval, 0, + seed, CLIENT_FINISHED.length + md5val.length, + shaval.length); + HashMap<String, Object> params = new HashMap<String, Object>(2); + params.put(TLSRandom.SECRET, session.privateData.masterSecret); + params.put(TLSRandom.SEED, seed); + prf.init(params); + byte[] buf = new byte[12]; + prf.nextBytes(buf, 0, buf.length); + finishedBuffer.put(buf).position(0); + } + else + { + // The SSLv3 algorithm is: + // + // enum { client(0x434C4E54), server(0x53525652) } Sender; + // + // struct { + // opaque md5_hash[16]; + // opaque sha_hash[20]; + // } Finished; + // + // md5_hash MD5(master_secret + pad2 + + // MD5(handshake_messages + Sender + + // master_secret + pad1)); + // sha_hash SHA(master_secret + pad2 + + // SHA(handshake_messages + Sender + + // master_secret + pad1)); + // + + finishedBuffer = ByteBuffer.allocate(36); + + md5.update(isClient ? SENDER_CLIENT : SENDER_SERVER); + md5.update(session.privateData.masterSecret); + md5.update(PAD1); + + byte[] tmp = md5.digest(); + md5.reset(); + md5.update(session.privateData.masterSecret); + md5.update(PAD2); + md5.update(tmp); + finishedBuffer.put(md5.digest()); + + sha.update(isClient ? SENDER_CLIENT : SENDER_SERVER); + sha.update(session.privateData.masterSecret); + sha.update(PAD1, 0, 40); + + tmp = sha.digest(); + sha.reset(); + sha.update(session.privateData.masterSecret); + sha.update(PAD2, 0, 40); + sha.update(tmp); + finishedBuffer.put(sha.digest()).position(0); + } + return finishedBuffer; + } + + protected void initDiffieHellman(DHPrivateKey dhKey, SecureRandom random) + throws SSLException + { + try + { + keyAgreement = KeyAgreement.getInstance("DH"); + keyAgreement.init(dhKey, random); + } + catch (InvalidKeyException ike) + { + throw new SSLException(ike); + } + catch (NoSuchAlgorithmException nsae) + { + throw new SSLException(nsae); + } + } + + protected void generateMasterSecret(Random clientRandom, + Random serverRandom, + SessionImpl session) + throws SSLException + { + assert(clientRandom != null); + assert(serverRandom != null); + assert(session != null); + + if (Debug.DEBUG_KEY_EXCHANGE) + logger.logv(Component.SSL_KEY_EXCHANGE, "preMasterSecret:\n{0}", + new ByteArray(preMasterSecret)); + + if (session.version == ProtocolVersion.SSL_3) + { + try + { + MessageDigest _md5 = MessageDigest.getInstance("MD5"); + MessageDigest _sha = MessageDigest.getInstance("SHA"); + session.privateData.masterSecret = new byte[48]; + + _sha.update((byte) 'A'); + _sha.update(preMasterSecret); + _sha.update(clientRandom.buffer()); + _sha.update(serverRandom.buffer()); + _md5.update(preMasterSecret); + _md5.update(_sha.digest()); + _md5.digest(session.privateData.masterSecret, 0, 16); + + _sha.update((byte) 'B'); + _sha.update((byte) 'B'); + _sha.update(preMasterSecret); + _sha.update(clientRandom.buffer()); + _sha.update(serverRandom.buffer()); + _md5.update(preMasterSecret); + _md5.update(_sha.digest()); + _md5.digest(session.privateData.masterSecret, 16, 16); + + _sha.update((byte) 'C'); + _sha.update((byte) 'C'); + _sha.update((byte) 'C'); + _sha.update(preMasterSecret); + _sha.update(clientRandom.buffer()); + _sha.update(serverRandom.buffer()); + _md5.update(preMasterSecret); + _md5.update(_sha.digest()); + _md5.digest(session.privateData.masterSecret, 32, 16); + } + catch (DigestException de) + { + throw new SSLException(de); + } + catch (NoSuchAlgorithmException nsae) + { + throw new SSLException(nsae); + } + } + else // TLSv1.0 and later + { + byte[] seed = new byte[clientRandom.length() + + serverRandom.length() + + MASTER_SECRET.length]; + System.arraycopy(MASTER_SECRET, 0, seed, 0, MASTER_SECRET.length); + clientRandom.buffer().get(seed, MASTER_SECRET.length, + clientRandom.length()); + serverRandom.buffer().get(seed, + MASTER_SECRET.length + clientRandom.length(), + serverRandom.length()); + TLSRandom prf = new TLSRandom(); + HashMap<String,byte[]> attr = new HashMap<String,byte[]>(2); + attr.put(TLSRandom.SECRET, preMasterSecret); + attr.put(TLSRandom.SEED, seed); + prf.init(attr); + + session.privateData.masterSecret = new byte[48]; + prf.nextBytes(session.privateData.masterSecret, 0, 48); + } + + if (Debug.DEBUG_KEY_EXCHANGE) + logger.log(Component.SSL_KEY_EXCHANGE, "master_secret: {0}", + new ByteArray(session.privateData.masterSecret)); + + // Wipe out the preMasterSecret. + for (int i = 0; i < preMasterSecret.length; i++) + preMasterSecret[i] = 0; + } + + protected void setupSecurityParameters(byte[][] keys, boolean isClient, + SSLEngineImpl engine, + CompressionMethod compression) + throws SSLException + { + assert(keys.length == 6); + assert(engine != null); + assert(compression != null); + + try + { + CipherSuite s = engine.session().suite; + Cipher inCipher = s.cipher(); + Mac inMac = s.mac(engine.session().version); + Inflater inflater = (compression == CompressionMethod.ZLIB + ? new Inflater() : null); + inCipher.init(Cipher.DECRYPT_MODE, + new SecretKeySpec(keys[isClient ? 3 : 2], + s.cipherAlgorithm().toString()), + new IvParameterSpec(keys[isClient ? 5 : 4])); + inMac.init(new SecretKeySpec(keys[isClient ? 1 : 0], + inMac.getAlgorithm())); + inParams = new InputSecurityParameters(inCipher, inMac, + inflater, + engine.session(), s); + + Cipher outCipher = s.cipher(); + Mac outMac = s.mac(engine.session().version); + Deflater deflater = (compression == CompressionMethod.ZLIB + ? new Deflater() : null); + outCipher.init(Cipher.ENCRYPT_MODE, + new SecretKeySpec(keys[isClient ? 2 : 3], + s.cipherAlgorithm().toString()), + new IvParameterSpec(keys[isClient ? 4 : 5])); + outMac.init(new SecretKeySpec(keys[isClient ? 0 : 1], + outMac.getAlgorithm())); + outParams = new OutputSecurityParameters(outCipher, outMac, + deflater, + engine.session(), s); + } + catch (InvalidAlgorithmParameterException iape) + { + throw new SSLException(iape); + } + catch (InvalidKeyException ike) + { + throw new SSLException(ike); + } + catch (NoSuchAlgorithmException nsae) + { + throw new SSLException(nsae); + } + catch (NoSuchPaddingException nspe) + { + throw new SSLException(nspe); + } + } + + protected void generatePSKSecret(String identity, byte[] otherkey, + boolean isClient) + throws SSLException + { + SecretKey key = null; + try + { + key = engine.contextImpl.pskManager.getKey(identity); + } + catch (KeyManagementException kme) + { + } + if (key != null) + { + byte[] keyb = key.getEncoded(); + if (otherkey == null) + { + otherkey = new byte[keyb.length]; + } + preMasterSecret = new byte[otherkey.length + keyb.length + 4]; + preMasterSecret[0] = (byte) (otherkey.length >>> 8); + preMasterSecret[1] = (byte) otherkey.length; + System.arraycopy(otherkey, 0, preMasterSecret, 2, otherkey.length); + preMasterSecret[otherkey.length + 2] + = (byte) (keyb.length >>> 8); + preMasterSecret[otherkey.length + 3] + = (byte) keyb.length; + System.arraycopy(keyb, 0, preMasterSecret, + otherkey.length + 4, keyb.length); + } + else + { + // Generate a random, fake secret. + preMasterSecret = new byte[8]; + preMasterSecret[1] = 2; + preMasterSecret[5] = 2; + preMasterSecret[6] = (byte) engine.session().random().nextInt(); + preMasterSecret[7] = (byte) engine.session().random().nextInt(); + } + + if (Debug.DEBUG_KEY_EXCHANGE) + logger.logv(Component.SSL_KEY_EXCHANGE, "PSK identity {0} key {1}", + identity, key); + + generateMasterSecret(clientRandom, serverRandom, + engine.session()); + byte[][] keys = generateKeys(clientRandom, serverRandom, + engine.session()); + setupSecurityParameters(keys, isClient, engine, compression); + } + + protected class DHPhase extends DelegatedTask + { + private final DHPublicKey key; + private final boolean full; + + protected DHPhase(DHPublicKey key) + { + this(key, true); + } + + protected DHPhase(DHPublicKey key, boolean full) + { + this.key = key; + this.full = full; + } + + protected void implRun() throws InvalidKeyException, SSLException + { + keyAgreement.doPhase(key, true); + preMasterSecret = keyAgreement.generateSecret(); + if (full) + { + generateMasterSecret(clientRandom, serverRandom, engine.session()); + byte[][] keys = generateKeys(clientRandom, serverRandom, engine.session()); + setupSecurityParameters(keys, engine.getUseClientMode(), engine, compression); + } + } + } + + protected class CertVerifier extends DelegatedTask + { + private final boolean clientSide; + private final X509Certificate[] chain; + private boolean verified; + + protected CertVerifier(boolean clientSide, X509Certificate[] chain) + { + this.clientSide = clientSide; + this.chain = chain; + } + + boolean verified() + { + return verified; + } + + protected void implRun() + { + X509TrustManager tm = engine.contextImpl.trustManager; + if (clientSide) + { + try + { + tm.checkServerTrusted(chain, null); + verified = true; + } + catch (CertificateException ce) + { + if (Debug.DEBUG) + logger.log(Component.SSL_DELEGATED_TASK, "cert verify", ce); + // For client connections, ask the user if the certificate is OK. + CallbackHandler verify = new DefaultCallbackHandler(); + GetSecurityPropertyAction gspa + = new GetSecurityPropertyAction("jessie.certificate.handler"); + String clazz = AccessController.doPrivileged(gspa); + try + { + ClassLoader cl = + AccessController.doPrivileged(new PrivilegedExceptionAction<ClassLoader>() + { + public ClassLoader run() throws Exception + { + return ClassLoader.getSystemClassLoader(); + } + }); + verify = (CallbackHandler) cl.loadClass(clazz).newInstance(); + } + catch (Exception x) + { + // Ignore. + if (Debug.DEBUG) + logger.log(Component.SSL_DELEGATED_TASK, + "callback handler loading", x); + } + // XXX Internationalize + CertificateCallback confirm = + new CertificateCallback(chain[0], + "The server's certificate could not be verified. There is no proof " + + "that this server is who it claims to be, or that their certificate " + + "is valid. Do you wish to continue connecting? "); + + try + { + verify.handle(new Callback[] { confirm }); + verified = confirm.getSelectedIndex() == ConfirmationCallback.YES; + } + catch (Exception x) + { + if (Debug.DEBUG) + logger.log(Component.SSL_DELEGATED_TASK, + "callback handler exception", x); + verified = false; + } + } + } + else + { + try + { + tm.checkClientTrusted(chain, null); + } + catch (CertificateException ce) + { + verified = false; + } + } + + if (verified) + engine.session().setPeerVerified(true); + } + } + + protected class DHE_PSKGen extends DelegatedTask + { + private final DHPublicKey dhKey; + private final SecretKey psKey; + private final boolean isClient; + + protected DHE_PSKGen(DHPublicKey dhKey, SecretKey psKey, boolean isClient) + { + this.dhKey = dhKey; + this.psKey = psKey; + this.isClient = isClient; + } + + /* (non-Javadoc) + * @see gnu.javax.net.ssl.provider.DelegatedTask#implRun() + */ + @Override protected void implRun() throws Throwable + { + keyAgreement.doPhase(dhKey, true); + byte[] dhSecret = keyAgreement.generateSecret(); + byte[] psSecret = null; + if (psKey != null) + psSecret = psKey.getEncoded(); + else + { + psSecret = new byte[8]; + engine.session().random().nextBytes(psSecret); + } + + preMasterSecret = new byte[dhSecret.length + psSecret.length + 4]; + preMasterSecret[0] = (byte) (dhSecret.length >>> 8); + preMasterSecret[1] = (byte) dhSecret.length; + System.arraycopy(dhSecret, 0, preMasterSecret, 2, dhSecret.length); + preMasterSecret[dhSecret.length + 2] = (byte) (psSecret.length >>> 8); + preMasterSecret[dhSecret.length + 3] = (byte) psSecret.length; + System.arraycopy(psSecret, 0, preMasterSecret, dhSecret.length + 4, + psSecret.length); + + generateMasterSecret(clientRandom, serverRandom, engine.session()); + byte[][] keys = generateKeys(clientRandom, serverRandom, engine.session()); + setupSecurityParameters(keys, isClient, engine, compression); + } + } +}
\ No newline at end of file |