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third_party/java/jsch/v0_1_44_google/README.google

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+Project URL: http://www.jcraft.com/jsch
+URL: http://downloads.sourceforge.net/project/jsch/jsch/0.1.44/jsch-0.1.44.zip?use_mirror=cdnetworks-us-1
+Version: 0.1.44
+License: BSD
+License File: LICENSE
+
+Description:
+JSCH is a library for making SSH and SFTP connections from Java.
+
+Local Modifications:
+Added three new features and one backport. Default behavior is preserved if
+they aren't used.
+
+* Define global ThreadFactory instance. This allows the library to be used on
+  App Engine, which doesn't allow apps to call `new Thread()`. To do this, you
+  must override `JSch.threadFactory` with something from GAE's ThreadManager.
+  Another global is also provided to disable calls to `Thread#setName` which
+  always crash on GAE, regardless of ThreadFactory.
+
+  Files edited:
+
+    * JSch.java - Defined new `threadFactory` and `useThreadNames` fields.
+    * Util.java - Updated thread creation code.
+    * ChannelDirectTCPIP.java - Updated thread creation code.
+    * ChannelSubsystem.java - Updated thread creation code.
+    * ChannelShell.java - Updated thread creation code.
+    * Session.java - Updated thread creation code.
+    * ChannelForwardedTCPIP.java - Updated thread creation code.
+    * ChannelExec.java - Updated thread creation code.
+
+* Multiple pending requests with SFTP. Disabled by default. Call
+  SftpChannel.setMaxPendingRequests(n) with n > 1 to enable (64 is a reasonable
+  value). Can provide speed improvements of 10-20x if Periscope is disabled,
+  and approximately 7x if Periscope is enabled and write flushing is disabled.
+
+  Files edited:
+
+    * ChannelSftp.java - Added alternate methods (fastGet, fastRead) that use
+                         new algorithm. If feature is enabled, the local window
+                         size will be set to Integer.MAX_VALUE, since flow
+                         control is already handled by SFTP, and some servers
+                         don't work well with smaller windows.
+
+* Disable flushing of writes. Flushing is enabled by default. Call
+  Session.setFlushingEnabled(false) before connecting to disable. Due to
+  Periscope latency, flushing must be disabled to take advantage of multiple
+  pending requests.
+
+  Files edited:
+
+    * Session.java - Added simple getter/setter for flushingEnabled boolean.
+    * IO.java - Added optional flushingEnabled constructor arg. Disabled
+                flushing when flushingEnabled is false.
+
+* Added support for diffie-hellman-group14-sha1 key exchange algorithm to
+  maintain connections to servers using upgraded OpenSSL.
+
+  Files edited:
+
+    * JSch.java - Added diffie-hellman-group14-sha1 to kex config.
+    * DHG14.java - Added, patched from version 0.1.46.
+    * jce/DH.java - Modified to support DH groups >1024 bits by ignoring
+                    JDK<8 exception and testing length of keys.