| /* |
| * Copyright (c) 1996, 2011, 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.io.OutputStream; |
| import java.io.IOException; |
| |
| /* |
| * Output stream for application data. This is the kind of stream |
| * that's handed out via SSLSocket.getOutputStream(). It's all the application |
| * ever sees. |
| * |
| * Once the initial handshake has completed, application data may be |
| * interleaved with handshake data. That is handled internally and remains |
| * transparent to the application. |
| * |
| * @author David Brownell |
| */ |
| class AppOutputStream extends OutputStream { |
| |
| private SSLSocketImpl c; |
| OutputRecord r; |
| |
| // One element array used to implement the write(byte) method |
| private final byte[] oneByte = new byte[1]; |
| |
| AppOutputStream(SSLSocketImpl conn) { |
| r = new OutputRecord(Record.ct_application_data); |
| c = conn; |
| } |
| |
| /** |
| * Write the data out, NOW. |
| */ |
| synchronized public void write(byte b[], int off, int len) |
| throws IOException { |
| if (b == null) { |
| throw new NullPointerException(); |
| } else if (off < 0 || len < 0 || len > b.length - off) { |
| throw new IndexOutOfBoundsException(); |
| } else if (len == 0) { |
| return; |
| } |
| |
| // check if the Socket is invalid (error or closed) |
| c.checkWrite(); |
| |
| /* |
| * By default, we counter chosen plaintext issues on CBC mode |
| * ciphersuites in SSLv3/TLS1.0 by sending one byte of application |
| * data in the first record of every payload, and the rest in |
| * subsequent record(s). Note that the issues have been solved in |
| * TLS 1.1 or later. |
| * |
| * It is not necessary to split the very first application record of |
| * a freshly negotiated TLS session, as there is no previous |
| * application data to guess. To improve compatibility, we will not |
| * split such records. |
| * |
| * This avoids issues in the outbound direction. For a full fix, |
| * the peer must have similar protections. |
| */ |
| boolean isFirstRecordOfThePayload = true; |
| |
| // Always flush at the end of each application level record. |
| // This lets application synchronize read and write streams |
| // however they like; if we buffered here, they couldn't. |
| try { |
| do { |
| int howmuch; |
| if (isFirstRecordOfThePayload && c.needToSplitPayload()) { |
| howmuch = Math.min(0x01, r.availableDataBytes()); |
| } else { |
| howmuch = Math.min(len, r.availableDataBytes()); |
| } |
| |
| if (isFirstRecordOfThePayload && howmuch != 0) { |
| isFirstRecordOfThePayload = false; |
| } |
| |
| // NOTE: *must* call c.writeRecord() even for howmuch == 0 |
| if (howmuch > 0) { |
| r.write(b, off, howmuch); |
| off += howmuch; |
| len -= howmuch; |
| } |
| c.writeRecord(r); |
| c.checkWrite(); |
| } while (len > 0); |
| } catch (Exception e) { |
| // shutdown and rethrow (wrapped) exception as appropriate |
| c.handleException(e); |
| } |
| } |
| |
| /** |
| * Write one byte now. |
| */ |
| synchronized public void write(int i) throws IOException { |
| oneByte[0] = (byte)i; |
| write(oneByte, 0, 1); |
| } |
| |
| /* |
| * Socket close is already synchronized, no need to block here. |
| */ |
| public void close() throws IOException { |
| c.close(); |
| } |
| |
| // inherit no-op flush() |
| } |