--- /dev/null
+/*
+ * org.ibex.net.SSL - By Brian Alliet
+ * Copyright (C) 2004 Brian Alliet
+ *
+ * Based on TinySSL by Adam Megacz
+ * Copyright (C) 2003 Adam Megacz <adam@xwt.org> all rights reserved.
+ *
+ * You may modify, copy, and redistribute this code under the terms of
+ * the GNU Lesser General Public License version 2.1, with the exception
+ * of the portion of clause 6a after the semicolon (aka the "obnoxious
+ * relink clause")
+ */
+
+package org.ibex.net;
+
+import org.ibex.crypto.*;
+import java.security.SecureRandom;
+
+import java.net.Socket;
+import java.net.SocketException;
+
+import java.io.*;
+import java.util.Enumeration;
+import java.util.Hashtable;
+import java.util.Random;
+import java.util.Vector;
+
+// FEATURE: Server socket
+
+public class SSL extends Socket {
+ private String hostname;
+
+ private int negotiated;
+
+ private boolean tls = true;
+ private boolean sha;
+
+ private final DataInputStream rawIS;
+ private final DataOutputStream rawOS;
+
+ private final InputStream sslIS;
+ private final OutputStream sslOS;
+
+ private byte[] sessionID;
+
+ private Digest clientWriteMACDigest;
+ private Digest serverWriteMACDigest;
+ private byte[] masterSecret;
+
+ private RC4 writeRC4;
+ private RC4 readRC4;
+
+ private long serverSequenceNumber;
+ private long clientSequenceNumber;
+
+ private int warnings;
+ private boolean closed;
+
+ // These are only used during negotiation
+ private byte[] serverRandom;
+ private byte[] clientRandom;
+ private byte[] preMasterSecret;
+
+ // Buffers
+ private byte[] mac;
+
+ private byte[] pending = new byte[16384];
+ private int pendingStart;
+ private int pendingLength;
+
+ private byte[] sendRecordBuf = new byte[16384];
+
+ private int handshakeDataStart;
+ private int handshakeDataLength;
+ private byte[] readRecordBuf = new byte[16384+20]; // 20 == sizeof(sha1 hash)
+ private byte[] readRecordScratch = new byte[16384+20];
+
+ private ByteArrayOutputStream handshakesBuffer;
+
+ // End Buffers
+
+ // Static variables
+ private final static byte[] pad1 = new byte[48];
+ private final static byte[] pad2 = new byte[48];
+ private final static byte[] pad1_sha = new byte[40];
+ private final static byte[] pad2_sha = new byte[40];
+
+ static {
+ for(int i=0; i<pad1.length; i++) pad1[i] = (byte)0x36;
+ for(int i=0; i<pad2.length; i++) pad2[i] = (byte)0x5C;
+ for(int i=0; i<pad1_sha.length; i++) pad1_sha[i] = (byte)0x36;
+ for(int i=0; i<pad2_sha.length; i++) pad2_sha[i] = (byte)0x5C;
+ }
+
+ private final static Hashtable caKeys = new Hashtable();
+ private static VerifyCallback verifyCallback;
+
+ //
+ // Constructors
+ //
+ public SSL(String host) throws IOException { this(host,443); }
+ public SSL(String host, int port) throws IOException { this(host,port,true); }
+ public SSL(String host, int port, boolean negotiate) throws IOException { this(host,port,negotiate,null); }
+ public SSL(String host, int port, State state) throws IOException { this(host,port,true,state); }
+ public SSL(String host, int port, boolean negotiate, State state) throws IOException {
+ super(host,port);
+ hostname = host;
+ rawIS = new DataInputStream(new BufferedInputStream(super.getInputStream()));
+ rawOS = new DataOutputStream(new BufferedOutputStream(super.getOutputStream()));
+ sslIS = new SSLInputStream();
+ sslOS = new SSLOutputStream();
+ if(negotiate) negotiate(state);
+ }
+
+ public synchronized void setTLS(boolean b) { if(negotiated!=0) throw new IllegalStateException("already negotiated"); tls = b; }
+
+ public void negotiate() throws IOException { negotiate(null); }
+ public synchronized void negotiate(State state) throws IOException {
+ if(negotiated != 0) throw new IllegalStateException("already negotiated");
+
+ handshakesBuffer = new ByteArrayOutputStream();
+
+ try {
+ sendClientHello(state != null ? state.sessionID : null);
+ flush();
+ debug("sent ClientHello (" + (tls?"TLSv1.0":"SSLv3.0")+")");
+
+ receiveServerHello();
+ debug("got ServerHello (" + (tls?"TLSv1.0":"SSLv3.0")+")");
+
+ boolean resume =
+ state != null && sessionID.length == state.sessionID.length &&
+ eq(state.sessionID,0,sessionID,0,sessionID.length);
+
+ if(resume)
+ negotiateResume(state);
+ else
+ negotiateNew();
+
+ // we're done with these now
+ clientRandom = serverRandom = preMasterSecret = null;
+ handshakesBuffer = null;
+
+ log("Negotiation with " + hostname + " complete (" + (tls?"TLSv1.0":"SSLv3.0")+")");
+ } finally {
+ if((negotiated & 3) != 3) {
+ negotiated = 0;
+ try { super.close(); } catch(IOException e) { /* ignore */ }
+ closed = true;
+ }
+ }
+ }
+
+ private void negotiateResume(State state) throws IOException {
+ masterSecret = state.masterSecret;
+
+ initCrypto();
+ log("initializec crypto");
+
+ receiveChangeCipherSpec();
+ debug("Received ChangeCipherSpec");
+ negotiated |= 2;
+ receieveFinished();
+ debug("Received Finished");
+
+ sendChangeCipherSpec();
+ debug("Sent ChangeCipherSpec");
+ negotiated |= 1;
+ sendFinished();
+ debug("Sent Finished");
+ }
+
+ private void negotiateNew() throws IOException {
+ X509.Certificate[] certs = receiveServerCertificates();
+ debug("got Certificate");
+
+ boolean gotCertificateRequest = false;
+ OUTER: for(;;) {
+ byte[] buf = readHandshake();
+ switch(buf[0]) {
+ case 14: // ServerHelloDone
+ if(buf.length != 4) throw new Exn("ServerHelloDone contained trailing garbage");
+ debug("got ServerHelloDone");
+ break OUTER;
+ case 13: // CertificateRequest
+ debug("Got a CertificateRequest message but we don't suport client certificates");
+ gotCertificateRequest = true;
+ break;
+ default:
+ throw new Exn("unknown handshake type " + buf[0]);
+ }
+ }
+
+ if(gotCertificateRequest)
+ sendHandshake((byte)11,new byte[3]); // send empty cert list
+
+ try {
+ if(!hostname.equalsIgnoreCase(certs[0].getCN()))
+ throw new Exn("Certificate is for " + certs[0].getCN() + " not " + hostname);
+ verifyCerts(certs);
+ } catch(Exn e) {
+ if(verifyCallback == null) throw e;
+ synchronized(SSL.class) {
+ if(!verifyCallback.checkCerts(certs,hostname,e)) throw e;
+ }
+ }
+
+ computeMasterSecret();
+
+ sendClientKeyExchange(certs[0]);
+ debug("sent ClientKeyExchange");
+
+ initCrypto();
+
+ sendChangeCipherSpec();
+ debug("sent ChangeCipherSpec");
+ negotiated |= 1;
+ sendFinished();
+ debug("sent Finished");
+ flush();
+
+ receiveChangeCipherSpec();
+ debug("got ChangeCipherSpec");
+ negotiated |= 2;
+ receieveFinished();
+ debug("got Finished");
+ }
+
+ public State getSessionState() {
+ if((negotiated&3)!=3 || !closed || warnings != 0) return null;
+ return new State(sessionID,masterSecret);
+ }
+ public boolean isActive() { return !closed; }
+ public boolean isNegotiated() { return (negotiated&3) == 3; }
+
+ private void sendClientHello(byte[] sessionID) throws IOException {
+ if(sessionID != null && sessionID.length > 256) throw new IllegalArgumentException("sessionID");
+ // 2 = version, 32 = randomvalue, 1 = sessionID size, 2 = cipher list size, 4 = the two ciphers,
+ // 2 = compression length/no compression
+ int p = 0;
+ byte[] buf = new byte[2+32+1+(sessionID == null ? 0 : sessionID.length)+2+2+4];
+ buf[p++] = 0x03; // major version
+ buf[p++] = tls ? (byte)0x01 : (byte)0x00;
+
+ clientRandom = new byte[32];
+ int now = (int)(System.currentTimeMillis() / 1000L);
+ new Random().nextBytes(clientRandom);
+ clientRandom[0] = (byte)(now>>>24);
+ clientRandom[1] = (byte)(now>>>16);
+ clientRandom[2] = (byte)(now>>>8);
+ clientRandom[3] = (byte)(now>>>0);
+ System.arraycopy(clientRandom,0,buf,p,32);
+ p += 32;
+
+ buf[p++] = sessionID != null ? (byte)sessionID.length : 0;
+ if(sessionID != null && sessionID.length != 0) System.arraycopy(sessionID,0,buf,p,sessionID.length);
+ p += sessionID != null ? sessionID.length : 0;
+ buf[p++] = 0x00; // 4 bytes of ciphers
+ buf[p++] = 0x04;
+ buf[p++] = 0x00; // SSL_RSA_WITH_RC4_128_SHA
+ buf[p++] = 0x05;
+ buf[p++] = 0x00; // SSL_RSA_WITH_RC4_128_MD5
+ buf[p++] = 0x04;
+
+ buf[p++] = 0x01;
+ buf[p++] = 0x00;
+
+ sendHandshake((byte)1,buf);
+ flush();
+ }
+
+ private void receiveServerHello() throws IOException {
+ // ServerHello
+ byte[] buf = readHandshake();
+ if(buf[0] != 2) throw new Exn("expected a ServerHello message");
+
+ if(buf.length < 6 + 32 + 1) throw new Exn("ServerHello too small");
+ if(buf.length < 6 + 32 + 1 + buf[6+32] + 3) throw new Exn("ServerHello too small " + buf.length+" "+buf[6+32]);
+
+ if(buf[4] != 0x03 || !(buf[5]==0x00 || buf[5]==0x01)) throw new Exn("server wants to use version " + buf[4] + "." + buf[5]);
+ tls = buf[5] == 0x01;
+ int p = 6;
+ serverRandom = new byte[32];
+ System.arraycopy(buf,p,serverRandom,0,32);
+ p += 32;
+ sessionID = new byte[buf[p++]&0xff];
+ if(sessionID.length != 0) System.arraycopy(buf,p,sessionID,0,sessionID.length);
+ p += sessionID.length;
+ int cipher = ((buf[p]&0xff)<<8) | (buf[p+1]&0xff);
+ p += 2;
+ switch(cipher) {
+ case 0x0004: sha = false; debug("Using SSL_RSA_WITH_RC4_128_MD5"); break;
+ case 0x0005: sha = true; debug("Using SSL_RSA_WITH_RC4_128_SHA"); break;
+ default: throw new Exn("Unsupported cipher " + cipher);
+ }
+ mac = new byte[sha ? 20 : 16];
+ if(buf[p++] != 0x0) throw new Exn("unsupported compression " + buf[p-1]);
+ }
+
+ private X509.Certificate[] receiveServerCertificates() throws IOException {
+ byte[] buf = readHandshake();
+ if(buf[0] != 11) throw new Exn("expected a Certificate message");
+ if((((buf[4]&0xff)<<16)|((buf[5]&0xff)<<8)|((buf[6]&0xff)<<0)) != buf.length-7) throw new Exn("size mismatch in Certificate message");
+ int p = 7;
+ int count = 0;
+
+ for(int i=p;i<buf.length-3;i+=((buf[p+0]&0xff)<<16)|((buf[p+1]&0xff)<<8)|((buf[p+2]&0xff)<<0)) count++;
+ if(count == 0) throw new Exn("server didn't provide any certificates");
+ X509.Certificate[] certs = new X509.Certificate[count];
+ count = 0;
+ while(p < buf.length) {
+ int len = ((buf[p+0]&0xff)<<16)|((buf[p+1]&0xff)<<8)|((buf[p+2]&0xff)<<0);
+ p += 3;
+ if(p + len > buf.length) throw new Exn("Certificate message cut short");
+ certs[count++] = new X509.Certificate(new ByteArrayInputStream(buf,p,len));
+ p += len;
+ }
+ return certs;
+ }
+
+ private void sendClientKeyExchange(X509.Certificate serverCert) throws IOException {
+ byte[] encryptedPreMasterSecret;
+ RSA.PublicKey pks = serverCert.getRSAPublicKey();
+ PKCS1 pkcs1 = new PKCS1(new RSA(pks.modulus,pks.exponent,false),random);
+ encryptedPreMasterSecret = pkcs1.encode(preMasterSecret);
+ byte[] buf;
+ if(tls) {
+ buf = new byte[encryptedPreMasterSecret.length+2];
+ buf[0] = (byte) (encryptedPreMasterSecret.length>>>8);
+ buf[1] = (byte) (encryptedPreMasterSecret.length>>>0);
+ System.arraycopy(encryptedPreMasterSecret,0,buf,2,encryptedPreMasterSecret.length);
+ } else {
+ // ugh... netscape didn't send the length bytes and now every SSLv3 implementation
+ // must implement this bug
+ buf = encryptedPreMasterSecret;
+ }
+ sendHandshake((byte)16,buf);
+ }
+
+ private void sendChangeCipherSpec() throws IOException {
+ sendRecord((byte)20,new byte[] { 0x01 });
+ }
+
+ private void computeMasterSecret() {
+ preMasterSecret = new byte[48];
+ preMasterSecret[0] = 0x03; // version_high
+ preMasterSecret[1] = tls ? (byte) 0x01 : (byte) 0x00; // version_low
+ randomBytes(preMasterSecret,2,46);
+
+ if(tls) {
+ masterSecret = tlsPRF(48,preMasterSecret,getBytes("master secret"),concat(clientRandom,serverRandom));
+ } else {
+ masterSecret = concat(new byte[][] {
+ md5(new byte[][] { preMasterSecret,
+ sha1(new byte[][] { new byte[] { 0x41 }, preMasterSecret, clientRandom, serverRandom })}),
+ md5(new byte[][] { preMasterSecret,
+ sha1(new byte[][] { new byte[] { 0x42, 0x42 }, preMasterSecret, clientRandom, serverRandom })}),
+ md5(new byte[][] { preMasterSecret,
+ sha1(new byte[][] { new byte[] { 0x43, 0x43, 0x43 }, preMasterSecret, clientRandom, serverRandom })})
+ } );
+ }
+ }
+
+ public void initCrypto() {
+ byte[] keyMaterial;
+
+ if(tls) {
+ keyMaterial = tlsPRF(
+ (mac.length + 16 + 0)*2, // MAC len + key len + iv len
+ masterSecret,
+ getBytes("key expansion"),
+ concat(serverRandom,clientRandom)
+ );
+ } else {
+ keyMaterial = new byte[] { };
+ for(int i=0; keyMaterial.length < 72; i++) {
+ byte[] crap = new byte[i + 1];
+ for(int j=0; j<crap.length; j++) crap[j] = (byte)(((byte)0x41) + ((byte)i));
+ keyMaterial = concat(new byte[][] { keyMaterial,
+ md5(new byte[][] { masterSecret,
+ sha1(new byte[][] { crap, masterSecret, serverRandom, clientRandom }) }) });
+ }
+ }
+
+ byte[] clientWriteMACSecret = new byte[mac.length];
+ byte[] serverWriteMACSecret = new byte[mac.length];
+ byte[] clientWriteKey = new byte[16];
+ byte[] serverWriteKey = new byte[16];
+
+ int p = 0;
+ System.arraycopy(keyMaterial, p, clientWriteMACSecret, 0, mac.length); p += mac.length;
+ System.arraycopy(keyMaterial, p, serverWriteMACSecret, 0, mac.length); p += mac.length;
+ System.arraycopy(keyMaterial, p, clientWriteKey, 0, 16); p += 16;
+ System.arraycopy(keyMaterial, p, serverWriteKey, 0, 16); p += 16;
+
+ Digest inner;
+
+ writeRC4 = new RC4(clientWriteKey);
+ inner = sha ? (Digest)new SHA1() : (Digest)new MD5();
+ clientWriteMACDigest = tls ? (Digest) new HMAC(inner,clientWriteMACSecret) : (Digest)new SSLv3HMAC(inner,clientWriteMACSecret);
+
+ readRC4 = new RC4(serverWriteKey);
+ inner = sha ? (Digest)new SHA1() : (Digest)new MD5();
+ serverWriteMACDigest = tls ? (Digest)new HMAC(inner,serverWriteMACSecret) : (Digest)new SSLv3HMAC(inner,serverWriteMACSecret);
+ }
+
+ private void sendFinished() throws IOException {
+ byte[] handshakes = handshakesBuffer.toByteArray();
+ if(tls) {
+ sendHandshake((byte)20, tlsPRF(
+ 12,
+ masterSecret,
+ getBytes("client finished"),
+ concat(md5(handshakes),sha1(handshakes))));
+
+ } else {
+ sendHandshake((byte)20, concat(new byte[][] {
+ md5(new byte[][] { masterSecret, pad2,
+ md5(new byte[][] { handshakes, new byte[] { (byte)0x43, (byte)0x4C, (byte)0x4E, (byte)0x54 },
+ masterSecret, pad1 }) }),
+ sha1(new byte[][] { masterSecret, pad2_sha,
+ sha1(new byte[][] { handshakes, new byte[] { (byte)0x43, (byte)0x4C, (byte)0x4E, (byte)0x54 },
+ masterSecret, pad1_sha } ) })
+ }));
+ }
+ }
+
+ private void receiveChangeCipherSpec() throws IOException {
+ int size = readRecord((byte)20);
+ if(size == -1) throw new Exn("got eof when expecting a ChangeCipherSpec message");
+ if(size != 1 || readRecordBuf[0] != 0x01) throw new Exn("Invalid ChangeCipherSpec message");
+ }
+
+ private void receieveFinished() throws IOException {
+ byte[] handshakes = handshakesBuffer.toByteArray();
+ byte[] buf = readHandshake();
+ if(buf[0] != 20) throw new Exn("expected a Finished message");
+ byte[] expected;
+
+ if(tls) {
+ if(buf.length != 4 + 12) throw new Exn("Finished message too short");
+ expected = tlsPRF(
+ 12,masterSecret,
+ getBytes("server finished"),
+ concat(md5(handshakes),sha1(handshakes)));
+ } else {
+ if(buf.length != 4 + 16 +20) throw new Exn("Finished message too short");
+ expected = concat(new byte[][] {
+ md5(new byte[][] { masterSecret, pad2,
+ md5(new byte[][] { handshakes, new byte[] { (byte)0x53, (byte)0x52, (byte)0x56, (byte)0x52 },
+ masterSecret, pad1 }) }),
+ sha1(new byte[][] { masterSecret, pad2_sha,
+ sha1(new byte[][] { handshakes, new byte[] { (byte)0x53, (byte)0x52, (byte)0x56, (byte)0x52 },
+ masterSecret, pad1_sha } ) } ) } );
+ }
+ if(!eq(expected,0,buf,4,expected.length)) throw new Exn("server finished message mismatch");
+ }
+
+ private void flush() throws IOException { rawOS.flush(); }
+
+ private void sendHandshake(byte type, byte[] payload) throws IOException {
+ if(payload.length > (1<<24)) throw new IllegalArgumentException("payload.length");
+ byte[] buf = new byte[4+payload.length];
+ buf[0] = type;
+ buf[1] = (byte)(payload.length>>>16);
+ buf[2] = (byte)(payload.length>>>8);
+ buf[3] = (byte)(payload.length>>>0);
+ System.arraycopy(payload,0,buf,4,payload.length);
+ handshakesBuffer.write(buf);
+ sendRecord((byte)22,buf);
+ }
+
+ private void sendRecord(byte proto, byte[] buf) throws IOException { sendRecord(proto,buf,0,buf.length); }
+ private void sendRecord(byte proto, byte[] payload, int off, int totalLen) throws IOException {
+ int macLength = (negotiated & 1) != 0 ? mac.length : 0;
+ while(totalLen > 0) {
+ int len = min(totalLen,16384-macLength);
+ rawOS.writeByte(proto);
+ rawOS.writeShort(tls ? 0x0301 : 0x0300);
+ if((negotiated & 1) != 0) {
+ computeMAC(proto,payload,off,len,clientWriteMACDigest,clientSequenceNumber);
+ // FEATURE: Encode in place
+ writeRC4.process(payload,off,sendRecordBuf,0,len);
+ writeRC4.process(mac,0,sendRecordBuf,len,macLength);
+ rawOS.writeShort(len + macLength);
+ rawOS.write(sendRecordBuf,0, len +macLength);
+ clientSequenceNumber++;
+ } else {
+ rawOS.writeShort(len);
+ rawOS.write(payload,off,len);
+ }
+ totalLen -= len;
+ off += len;
+ }
+ }
+
+ private byte[] readHandshake() throws IOException {
+ if(handshakeDataLength == 0) {
+ handshakeDataStart = 0;
+ handshakeDataLength = readRecord((byte)22);
+ if(handshakeDataLength == -1) throw new Exn("got eof when expecting a handshake packet");
+ }
+ byte[] buf = readRecordBuf;
+ int len = ((buf[handshakeDataStart+1]&0xff)<<16)|((buf[handshakeDataStart+2]&0xff)<<8)|((buf[handshakeDataStart+3]&0xff)<<0);
+ // Handshake messages can theoretically span multiple records, but in practice this does not occur
+ if(len > handshakeDataLength) {
+ sendAlert(true,10); // 10 == unexpected message
+ throw new Exn("handshake message size too large " + len + " vs " + (handshakeDataLength-handshakeDataStart));
+ }
+ byte[] ret = new byte[4+len];
+ System.arraycopy(buf,handshakeDataStart,ret,0,ret.length);
+ handshakeDataLength -= ret.length;
+ handshakeDataStart += ret.length;
+ handshakesBuffer.write(ret);
+ return ret;
+ }
+
+ private int readRecord(byte reqProto) throws IOException {
+ int macLength = (negotiated & 2) != 0 ? mac.length : 0;
+ for(;;) {
+ byte proto;
+ int version, len;
+
+ try {
+ proto = rawIS.readByte();
+ } catch(EOFException e) {
+ // this may or may not be an error. it is up to the application protocol
+ closed = true;
+ super.close();
+ throw new PrematureCloseExn();
+ }
+ try {
+ version = rawIS.readShort();
+ if(version != 0x0300 && version != 0x0301) throw new Exn("invalid version ");
+ len = rawIS.readShort();
+ if(len <= 0 || len > 16384+((negotiated&2)!=0 ? macLength : 0)) throw new Exn("invalid length " + len);
+ rawIS.readFully((negotiated&2)!=0 ? readRecordScratch : readRecordBuf,0,len);
+ } catch(EOFException e) {
+ // an EOF here is always an error (we don't pass the EOF back on to the app
+ // because it isn't a "legitimate" eof)
+ throw new Exn("Hit EOF too early");
+ }
+
+ if((negotiated & 2) != 0) {
+ if(len < macLength) throw new Exn("packet size < macLength");
+ // FEATURE: Decode in place
+ readRC4.process(readRecordScratch,0,readRecordBuf,0,len);
+ computeMAC(proto,readRecordBuf,0,len-macLength,serverWriteMACDigest,serverSequenceNumber);
+ for(int i=0;i<macLength;i++)
+ if(mac[i] != readRecordBuf[len-macLength+i])
+ throw new Exn("mac mismatch");
+ len -= macLength;
+ serverSequenceNumber++;
+ }
+
+ if(proto == reqProto) return len;
+
+ switch(proto) {
+ case 21: { // ALERT
+ if(len != 2) throw new Exn("invalid lengh for alert");
+ int level = readRecordBuf[0];
+ int desc = readRecordBuf[1];
+ if(level == 1) {
+ if(desc == 0) { // CloseNotify
+ debug("Server requested connection closure");
+ try {
+ sendCloseNotify();
+ } catch(SocketException e) { /* incomplete close, thats ok */ }
+ closed = true;
+ super.close();
+ return -1;
+ } else {
+ warnings++;
+ log("SSL ALERT WARNING: desc: " + desc);
+ }
+ } else if(level == 2) {
+ throw new Exn("SSL ALERT FATAL: desc: " +desc);
+ } else {
+ throw new Exn("invalid alert level");
+ }
+ break;
+ }
+ case 22: { // Handshake
+ int type = readRecordBuf[0];
+ int hslen = ((readRecordBuf[1]&0xff)<<16)|((readRecordBuf[2]&0xff)<<8)|((readRecordBuf[3]&0xff)<<0);
+ if(hslen > len - 4) throw new Exn("Multiple sequential handshake messages received after negotiation");
+ if(type == 0) { // HellloRequest
+ if(tls) sendAlert(false,100); // politely refuse, 100 == NoRegnegotiation
+ } else {
+ throw new Exn("Unexpected Handshake type: " + type);
+ }
+ }
+ default: throw new Exn("Unexpected protocol: " + proto);
+ }
+ }
+ }
+
+ private static void longToBytes(long l, byte[] buf, int off) {
+ for(int i=0;i<8;i++) buf[off+i] = (byte)(l>>>(8*(7-i)));
+ }
+ private void computeMAC(byte proto, byte[] payload, int off, int len, Digest digest, long sequenceNumber) {
+ if(tls) {
+ longToBytes(sequenceNumber,mac,0);
+ mac[8] = proto;
+ mac[9] = 0x03; // version
+ mac[10] = 0x01;
+ mac[11] = (byte)(len>>>8);
+ mac[12] = (byte)(len>>>0);
+
+ digest.update(mac,0,13);
+ digest.update(payload,off,len);
+ digest.doFinal(mac,0);
+ } else {
+ longToBytes(sequenceNumber, mac, 0);
+ mac[8] = proto;
+ mac[9] = (byte)(len>>>8);
+ mac[10] = (byte)(len>>>0);
+
+ digest.update(mac, 0, 11);
+ digest.update(payload, off, len);
+ digest.doFinal(mac, 0);
+ }
+ }
+
+ private void sendCloseNotify() throws IOException { sendRecord((byte)21, new byte[] { 0x01, 0x00 }); }
+ private void sendAlert(boolean fatal, int message) throws IOException {
+ byte[] buf = new byte[] { fatal ? (byte)2 :(byte)1, (byte)message };
+ sendRecord((byte)21,buf);
+ flush();
+ }
+
+ //
+ // Hash functions
+ //
+
+ // Shared digest objects
+ private MD5 masterMD5 = new MD5();
+ private SHA1 masterSHA1 = new SHA1();
+
+ private byte[] md5(byte[] in) { return md5( new byte[][] { in }); }
+ private byte[] md5(byte[][] inputs) {
+ masterMD5.reset();
+ for(int i=0; i<inputs.length; i++) masterMD5.update(inputs[i], 0, inputs[i].length);
+ byte[] ret = new byte[masterMD5.getDigestSize()];
+ masterMD5.doFinal(ret, 0);
+ return ret;
+ }
+
+ private byte[] sha1(byte[] in) { return sha1(new byte[][] { in }); }
+ private byte[] sha1(byte[][] inputs) {
+ masterSHA1.reset();
+ for(int i=0; i<inputs.length; i++) masterSHA1.update(inputs[i], 0, inputs[i].length);
+ byte[] ret = new byte[masterSHA1.getDigestSize()];
+ masterSHA1.doFinal(ret, 0);
+ return ret;
+ }
+
+ /* RFC-2246
+ PRF(secret, label, seed) = P_MD5(S1, label + seed) XOR P_SHA-1(S2, label + seed);
+ L_S = length in bytes of secret;
+ L_S1 = L_S2 = ceil(L_S / 2);
+
+ The secret is partitioned into two halves (with the possibility of
+ one shared byte) as described above, S1 taking the first L_S1 bytes
+ and S2 the last L_S2 bytes.
+
+ P_hash(secret, seed) = HMAC_hash(secret, A(1) + seed) +
+ HMAC_hash(secret, A(2) + seed) +
+ HMAC_hash(secret, A(3) + seed) + ...
+
+ A(0) = seed
+ A(i) = HMAC_hash(secret, A(i-1))
+ */
+ private byte[] tlsPRF(int size,byte[] secret, byte[] label, byte[] seed) {
+ if(size > 112) throw new IllegalArgumentException("size > 112");
+ seed = concat(label,seed);
+
+ int half_length = (secret.length + 1) / 2;
+ byte[] s1 = new byte[half_length];
+ System.arraycopy(secret,0,s1,0,half_length);
+ byte[] s2 = new byte[half_length];
+ System.arraycopy(secret,secret.length - half_length, s2, 0, half_length);
+
+ Digest hmac_md5 = new HMAC(new MD5(),s1);
+ Digest hmac_sha = new HMAC(new SHA1(),s2);
+
+ byte[] md5out = new byte[112];
+ byte[] shaout = new byte[120];
+ byte[] digest = new byte[20];
+ int n;
+
+ n = 0;
+ hmac_md5.update(seed,0,seed.length);
+ hmac_md5.doFinal(digest,0);
+
+ // digest == md5_a_1
+ while(n < size) {
+ hmac_md5.update(digest,0,16);
+ hmac_md5.update(seed,0,seed.length);
+ hmac_md5.doFinal(md5out,n);
+ hmac_md5.update(digest,0,16);
+ hmac_md5.doFinal(digest,0);
+ n += 16;
+ }
+
+ n = 0;
+ hmac_sha.update(seed,0,seed.length);
+ hmac_sha.doFinal(digest,0);
+
+ while(n < size) {
+ hmac_sha.update(digest,0,20);
+ hmac_sha.update(seed,0,seed.length);
+ hmac_sha.doFinal(shaout,n);
+ hmac_sha.update(digest,0,20);
+ hmac_sha.doFinal(digest,0);
+ n += 20;
+ }
+
+ byte[] ret = new byte[size];
+ for(int i=0;i<size;i++) ret[i] = (byte)(md5out[i] ^ shaout[i]);
+ return ret;
+ }
+
+ public static class SSLv3HMAC extends Digest {
+ private final Digest h;
+ private final byte[] digest;
+ private final byte[] key;
+ private final int padSize;
+
+ public int getDigestSize() { return h.getDigestSize(); }
+
+ public SSLv3HMAC(Digest h, byte[] key) {
+ this.h = h;
+ this.key = key;
+ switch(h.getDigestSize()) {
+ case 16: padSize = 48; break;
+ case 20: padSize = 40; break;
+ default: throw new IllegalArgumentException("unsupported digest size");
+ }
+ digest = new byte[h.getDigestSize()];
+ reset();
+ }
+ public void reset() {
+ h.reset();
+ h.update(key,0,key.length);
+ h.update(pad1,0,padSize);
+ }
+ public void update(byte[] b, int off, int len) { h.update(b,off,len); }
+ public void doFinal(byte[] out, int off){
+ h.doFinal(digest,0);
+ h.update(key,0,key.length);
+ h.update(pad2,0,padSize);
+ h.update(digest,0,digest.length);
+ h.doFinal(out,off);
+ reset();
+ }
+ protected void processWord(byte[] in, int inOff) {}
+ protected void processLength(long bitLength) {}
+ protected void processBlock() {}
+ }
+
+ //
+ // Static Methods
+ //
+
+ private static SecureRandom random = new SecureRandom();
+ public static synchronized void randomBytes(byte[] buf, int off, int len) {
+ byte[] bytes = new byte[len];
+ random.nextBytes(bytes);
+ System.arraycopy(bytes,0,buf,off,len);
+ }
+
+ public static byte[] concat(byte[] a, byte[] b) { return concat(new byte[][] { a, b }); }
+ public static byte[] concat(byte[] a, byte[] b, byte[] c) { return concat(new byte[][] { a, b, c }); }
+ public static byte[] concat(byte[][] inputs) {
+ int total = 0;
+ for(int i=0; i<inputs.length; i++) total += inputs[i].length;
+ byte[] ret = new byte[total];
+ for(int i=0,pos=0; i<inputs.length;pos+=inputs[i].length,i++)
+ System.arraycopy(inputs[i], 0, ret, pos, inputs[i].length);
+ return ret;
+ }
+
+ public static byte[] getBytes(String s) {
+ try {
+ return s.getBytes("US-ASCII");
+ } catch (UnsupportedEncodingException e) {
+ return null; // will never happen
+ }
+ }
+
+ public static boolean eq(byte[] a, int aoff, byte[] b, int boff, int len){
+ for(int i=0;i<len;i++) if(a[aoff+i] != b[boff+i]) return false;
+ return true;
+ }
+
+ //
+ // InputStream/OutputStream/Socket interfaces
+ //
+ public OutputStream getOutputStream() { return sslOS; }
+ public InputStream getInputStream() { return sslIS; }
+ public synchronized void close() throws IOException {
+ if(!closed) {
+ if(negotiated != 0) {
+ sendCloseNotify();
+ flush();
+ // don't bother sending a close_notify back to the server
+ // this is an incomplete close which is allowed by the spec
+ }
+ super.close();
+ closed = true;
+ }
+ }
+
+ private int read(byte[] buf, int off, int len) throws IOException {
+ if(pendingLength == 0) {
+ if(closed) return -1;
+ int readLen = readRecord((byte)23);
+ if(readLen == -1) return -1; // EOF
+ len = min(len,readLen);
+ System.arraycopy(readRecordBuf,0,buf,off,len);
+ if(readLen > len) System.arraycopy(readRecordBuf,len,pending,0,readLen-len);
+ pendingStart = 0;
+ pendingLength = readLen - len;
+ return len;
+ } else {
+ len = min(len,pendingLength);
+ System.arraycopy(pending,pendingStart,buf,off,len);
+ pendingLength -= len;
+ pendingStart += len;
+ return len;
+ }
+ }
+
+ private void write(byte[] buf, int off, int len) throws IOException {
+ if(closed) throw new SocketException("Socket closed");
+ sendRecord((byte)23,buf,off,len);
+ flush();
+ }
+
+ private class SSLInputStream extends InputStream {
+ public int available() throws IOException {
+ synchronized(SSL.this) {
+ return negotiated != 0 ? pendingLength : rawIS.available();
+ }
+ }
+ public int read() throws IOException {
+ synchronized(SSL.this) {
+ if(negotiated==0) return rawIS.read();
+ if(pendingLength > 0) {
+ pendingLength--;
+ return pending[pendingStart++];
+ } else {
+ byte[] buf = new byte[1];
+ int n = read(buf);
+ return n == -1 ? -1 : buf[0]&0xff;
+ }
+ }
+ }
+ public int read(byte[] buf, int off, int len) throws IOException {
+ synchronized(SSL.this) {
+ return negotiated!=0 ? SSL.this.read(buf,off,len) : rawIS.read(buf,off,len);
+ }
+ }
+ public long skip(long n) throws IOException {
+ synchronized(SSL.this) {
+ if(negotiated==0) return rawIS.skip(n);
+ if(pendingLength > 0) {
+ n = min((int)n,pendingLength);
+ pendingLength -= n;
+ pendingStart += n;
+ return n;
+ }
+ return super.skip(n);
+ }
+ }
+ }
+
+ private class SSLOutputStream extends OutputStream {
+ public void flush() throws IOException { rawOS.flush(); }
+ public void write(int b) throws IOException { write(new byte[] { (byte)b }); }
+ public void write(byte[] buf, int off, int len) throws IOException {
+ synchronized(SSL.this) {
+ if(negotiated!=0)
+ SSL.this.write(buf,off,len);
+ else
+ rawOS.write(buf,off,len);
+ }
+ }
+ }
+
+ public static class Exn extends IOException { public Exn(String s) { super(s); } }
+ public static class PrematureCloseExn extends Exn {
+ public PrematureCloseExn() { super("Connection was closed by the remote WITHOUT a close_noify"); }
+ }
+
+ public static boolean debugOn = false;
+ private static void debug(Object o) { if(debugOn) System.err.println("[BriSSL-Debug] " + o.toString()); }
+ private static void log(Object o) { System.err.println("[BriSSL] " + o.toString()); }
+
+ private static void verifyCerts(X509.Certificate[] certs) throws DER.Exception, Exn {
+ try {
+ verifyCerts_(certs);
+ } catch(RuntimeException e) {
+ e.printStackTrace();
+ throw new Exn("Error while verifying certificates: " + e);
+ }
+ }
+
+ private static void verifyCerts_(X509.Certificate[] certs) throws DER.Exception, Exn {
+ boolean ignoreLast = false;
+ for(int i=0;i<certs.length;i++) {
+ debug("Cert " + i + ": " + certs[i].subject + " ok");
+ if(!certs[i].isValid())
+ throw new Exn("Certificate " + i + " in certificate chain is not valid (" + certs[i].startDate + " - " + certs[i].endDate + ")");
+ if(i != 0) {
+ X509.Certificate.BC bc = certs[i].basicContraints;
+ if(bc == null) {
+ if(i == certs.length - 1) {
+ ignoreLast = true;
+ break;
+ }
+ throw new Exn("CA-cert lacks Basic Constraints");
+ } else {
+ if(!bc.isCA) throw new Exn("non-CA certificate used for signing");
+ if(bc.pathLenConstraint != null && bc.pathLenConstraint.longValue() < i-1) throw new Exn("CA cert can't be used this deep");
+ }
+ }
+ if(i != certs.length - 1) {
+ if(!certs[i].issuer.equals(certs[i+1].subject))
+ throw new Exn("Issuer for certificate " + i + " does not match next in chain");
+ if(!certs[i].isSignedBy(certs[i+1]))
+ throw new Exn("Certificate " + i + " in chain is not signed by the next certificate");
+ }
+ }
+
+ X509.Certificate cert = certs[ignoreLast ? certs.length - 2 : certs.length-1];
+
+ RSA.PublicKey pks = (RSA.PublicKey) caKeys.get(cert.issuer);
+ if(pks == null) throw new Exn("Certificate is signed by an unknown CA (" + cert.issuer + ")");
+ if(!cert.isSignedWith(pks)) throw new Exn("Certificate is not signed by its CA");
+ log("" + cert.subject + " is signed by " + cert.issuer);
+ }
+
+ public static void addCACert(byte[] b) throws IOException { addCACert(new ByteArrayInputStream(b)); }
+ public static void addCACert(InputStream is) throws IOException { addCACert(new X509.Certificate(is)); }
+ public static void addCACert(X509.Certificate cert) throws DER.Exception { addCAKey(cert.subject,cert.getRSAPublicKey()); }
+ public static void addCAKey(X509.Name subject, RSA.PublicKey pks) {
+ synchronized(caKeys) {
+ if(caKeys.get(subject) != null)
+ throw new IllegalArgumentException(subject.toString() + " already exists!");
+ caKeys.put(subject,pks);
+ }
+ }
+
+ static {
+ try {
+ // This will force a <clinit> which'll load the certs
+ Class.forName("org.ibex.net.ssl.RootCerts");
+ log("Loaded root keys from org.ibex.net.ssl.RootCerts");
+ } catch(ClassNotFoundException e) {
+ InputStream is = SSL.class.getClassLoader().getResourceAsStream("org.ibex/net/ssl/rootcerts.dat");
+ if(is != null) {
+ try {
+ addCompactCAKeys(is);
+ log("Loaded root certs from rootcerts.dat");
+ } catch(IOException e2) {
+ log("Error loading certs from rootcerts.dat: " + e2.getMessage());
+ }
+ }
+ }
+ }
+
+ public static int addCompactCAKeys(InputStream is) throws IOException {
+ synchronized(caKeys) {
+ try {
+ Vector seq = (Vector) new DER.InputStream(is).readObject();
+ for(Enumeration e = seq.elements(); e.hasMoreElements();) {
+ Vector seq2 = (Vector) e.nextElement();
+ X509.Name subject = new X509.Name(seq2.elementAt(0));
+ RSA.PublicKey pks = new RSA.PublicKey(seq2.elementAt(1));
+ addCAKey(subject,pks);
+ }
+ return seq.size();
+ } catch(RuntimeException e) {
+ e.printStackTrace();
+ throw new IOException("error while reading stream: " + e);
+ }
+ }
+ }
+
+ public static synchronized void setVerifyCallback(VerifyCallback cb) { verifyCallback = cb; }
+
+ // State Info
+ public static class State {
+ byte[] sessionID;
+ byte[] masterSecret;
+ State(byte[] sessionID, byte[] masterSecret) {
+ this.sessionID = sessionID;
+ this.masterSecret = masterSecret;
+ }
+ }
+
+ public interface VerifyCallback {
+ public boolean checkCerts(X509.Certificate[] certs, String hostname, Exn exn);
+ }
+
+ // Helper methods
+ private static final int min(int a, int b) { return a < b ? a : b; }
+}
projects / org.ibex.net.git / blobdiff