ssh2/NEWS

Version 0.18
------------

- Various changes that improve non-blocking operations and prevent stalls.
  Especially noticable on Windows since libssh2 just didn't work properly
  non-blocking on Windows before.

- Peter O'Gorman reported how a SCP transfer would hang for him, and it was
  fairly easy reproducable. One bug was in the transport layer, ignoring to
  read more data while there was data left even though it couldn't decrypt the
  data that was left due to it being too little... The other bug was in the
  channel layer, where the libssh2_channel_receive_window_adjust() function
  missed to set the state variables at times and thus this function would
  misbehave on repeated invokes.

- Changed the signature of libssh2_channel_setenv_ex to add const to the
  "varname" parameter (Dan Fandrich)

- Satish Mittal and David J Sullivan fixed an infinit recv() loop in
  libssh2_banner_receive()

Version 0.17 (August 6 2007)
----------------------------
Changes since previous version include:

   o Re-indented the source code with this GNU indent setup:

      --braces-on-if-line
      --braces-after-struct-decl-line
      --space-after-cast
      --line-length 79
      --comment-line-length 79
      --cuddle-else
      --no-tabs
      --tab-size 8
      --indent-level 4
      --no-space-after-for
      --space-after-if
      --space-after-while
      --no-space-after-function-call-names

Version 0.16 (August 6 2007)
----------------------------
Changes since previous version include:

   o CRLF stripping fix for PEM reading
   o libssh2_scp_recv() error message fix
   o added HACKING as an initial attempt to describe our source code format
   o new public defines in include/libssh2.h to allow applictions to figure out
     version number etc
   o new script (maketgz) to build releases with
   o updated files for building with MSVC and mingw
   o keyboard-interactive would always fail due to claimed memory problem
   o a few minor memory leaks fixed
   o libssh2_poll() no longer relies on C99 features
   o AIX 4 and 5 now supports non-blocking sockets
   o large file magic checks in configure
   o LIBSSH2_APINO was removed from the public header file

This release would not have been possible without these friendly contributors:

   James Housley, Simon Josefsson, Dan Fandrich, Guenter Knauf and I too did
   some poking. (Sorry if I forgot anyone I should've mentioned here.)

Of course we would have nothing without the great work by Sara Golemon that 
we're extending and building upon.

Version 0.15 (June 15 2007)
---------------------------
  Added libssh2_sftp_readdir_ex() and updated LIBSSH2_APINO to
  200706151200 (James Housley)

  Converted all of the libssh2 code to be able to work in non-blocking
  mode.  This included some public API changes, listed below (James Housley)
    Changed function return values:
     int libssh2_session_free()
     int libssh2_publickey_shutdown()
     ssize_t libssh2_channel_read_ex()
     ssize_t libssh2_channel_write_ex()
  
    Added functions:
     libssh2_session_last_errno(), libssh2_channel_handle_extended_data2(),
     libssh2_channel_wait_closed(), libssh2_channel_wait_eof(),
     libssh2_session_set_blocking()
   
    Removed functions:
     libssh2_channel_readnb_ex(), libssh2_channel_writenb_ex(),
     libssh2_sftp_readnb(), libssh2_sftp_writenb(),
     libssh2_sftp_mkdirnb_ex()

  Added the following functions for non-blocking operations: (Daniel Stenberg)
   libssh2_channel_readnb_ex()
   libssh2_channel_writenb_ex()
   libssh2_sftp_readnb()
   libssh2_sftp_writenb()

  Size parameter changed from 'int' to 'unsigned int' in several
  public APIs.

  Added (a few) man pages in docs/. (Daniel Stenberg)

  Maximum SSH packet size is now some 35000 bytes.

  Private include files are now in src/ and only public headers are in
  include/.  (Daniel Stenberg)

  Automake and libtool are being used (increased portability). (Daniel
  Stenberg)

  Fixed OpenSSL detection using pkg-config. (Daniel Stenberg)

  Simple self test added to tests/. (Simon Josefsson)

  Libgcrypt can now be used instead of OpenSSL if you specify
  --with-libgcrypt.  (Simon Josefsson)

  Fixed a memory leak in the packet handling, and better handle out of
  memory situations. (Dan Fandrich)

  Made libssh2 build with OpenSSL 0.9.6. (Dan Fandrich)

  Improved portability to Solaris related to -lsocket and
  -lnsl. (Simon Josefsson)

  Clean up of README, INSTALL, NEWS, added ChangeLog. (Simon
  Josefsson)

  Improve debugging code.  Avoids many #ifdef's.

  Improved session closing to avoid potentially truncated files on
  OpenSSH servers (Dan Fandrich)

  Made some function parameters in the API const (Dan Fandrich)

Version 0.14
------------

  Plug leaks in EVP cipher init/shutdown. (Selcuk Gueney)

  Allow socket_fd == 0 in libssh2_session_startup(). (puudeli)

  Swap ordering of packet_add/packet-inspection to avoid inspect after
  free. (Selcuk)

  Swap KEX_INIT ordering, send our KEX_INIT first.

  Add check for oportunistic KEX_INIT packets.  Burn bad guess if necessary.

  Fix OpenSSL detection using pkg-config. (Dan Casey)

Version 0.13
------------

  Fixed channel not being marked closed when CHANNEL_CLOSE package cannot be
  sent. (David Robins)

  Fixed payload packet allocation bug when invalid packet length
  received. (David Robins)

  Fixed `make install' target for MacOSX.

  Add terminating NULL character to readlink()/realpath() results.

  BugFix#1436593: Apply build options for HPUX targets.

Version 0.12
------------

  Added support for publickey subsytem (not the same as publickey auth).

  Fix x11_req.  Multiple packet_len issues and error handling logic.
    (Thanks Simon Hart)

  Fix generation of 'e' portion of Diffie-Hellman keyset.

  Use appropriate order for BN_rand() rather than fixed group1-specific value.

  Re-fixed libssh2_sftp_rename_ex()

  Transport had right packet_len, but sftp layer still had extra 4 bytes.

  Fixed build with newer OpenSSL headers.

  Added extern "C" declarations to libssh2_sftp.h for C++ compatability.

Version 0.11
------------

  Added libssh2_chnnale_get_exit_status() -- Mikhail

  Added libssh2_channel_wait_closed() -- Mikhail

  Added libssh2_userauth_keyboard_interactive_ex() -- Mikhail

  Added libssh2_channel_receive_window_adjust() to be able to increase the
  size of the receive window.

  Added queueing for small window_adjust packets to avoid unnecessary packet
  conversation.

  Fixed libssh2_sftp_rename_ex() to only send flags parameter if version >= 5
  negotiated (not currently possible, but will be and might as well keep the
  API consistent).

Version 0.10
------------

  Added developer debugging hooks.  See --enable-debug-* options to ./configure

  Ignore extended data in the SFTP layer.  With no other mechanism to deal
  with that data it'd just fill up and get stuck.

  (Re)Fixed channel_write() to provide an opportunity for window space to
  become available again.

  (Re)Fixed SFTP INIT to send the correct SFTP packet length.

  Fixed segfault when client and host can't agree on a hostkey/crypt/mac/comp
  method. (Thanks puudeli)

  Fixed major issue with sftp packet buffering mechanism.  Using wrong
  blocking semantics. (No puudeli, YOU the man)

  Reduced busy-looping of libssh2_sftp_packet_requirev.

Version 0.9
-----------

  Changed blocking_read to only block as much as necessary and not an
  arbitrary length of time. (Thanks Felix)

  Fixed SFTP INIT/VERSION to exclude request_id and send correct maximum
  version number.

  Fixed SFTP to be properly BC with version 1 and 2 servers.

  Fixed libssh2_poll() to recognized closed sessions/channels.

  Fixed libssh2_channel_write_ex() to fully block when set to blocking mode.
  Return actual bytes written as well.  (Thanks deadem)

  Added tests for -lm and -lsocket and add them when necessary.

  Added libssh2_channel_window_read_ex() and libssh2_channel_window_write_ex()
  for examining the ssh transport windowing states.

Version 0.8
-----------

  Fix potential segfault in compression/decompression.

  Fix compatability with older versions of OpenSSL

  Swapped order of none,zlib compression modes to prefer no compression by
  default.

  Added sys/uio.h for platforms (FBSD) which need it in order to define struct
  iovec.

  Added libssh2_poll() to check status of sockets/channels/listeners.

  Removed unnecessary inclusion of stdio.h (holdover from debugging)

Version 0.7
-----------

  Added libssh2_userauth_hostbased_fromfile_ex() for authenticating from hostkey.

  Added configure recognition for MacOSX (Darwin) (Thanks Gabe)

  Fixed extended data identification in libssh2_channel_read().

  Fixed window adjust code.  Hadn't acknowledged adjustments correctly.

  Removed initial_window_size requirement for sending window adjust packet.


Version 0.6
-----------

  Added LIBSSH2_FLAG_SIGPIPE to enable/disable SIGPIPE generated by
  send()/recv() calls. Default off.

  Added libssh2_session_flag() to set optional session flags.

  Collapsed exchanging_keys/newkeys/authenticated flags into single state
  attribute.

  Fix zlib compression issue when internal buffer state misses partial sync.

  Fix segfault when libssh2_session_methods() is called prior to
  session_startup().

  Fixed client to server channel windowing.  Pervent send queue overruns.

  Swapped banner send/receive order (send first, then wait for response).

Version 0.5
-----------

  *** BC Break ***
  Reimplemented libssh2_session_methods() to match
  libssh2_session_method_pref() style

  Fixed libssh2_attr2bin() (effects any setstat style call).

  Fixed authenticating with encrypted private key.

  Fixed authenticating via ssh-dss public key.

  Fixed KEX_INIT cookie and packet padding to use actual random data

  Added DESTDIR support to makefiles (Adam Go<47><6F>biowski -- I hope that
  character set translates right)

  Added libssh2_channel_forward_listen_ex(), libssh2_channel_forward_cancel(),
  and libssh2_channel_forward_accept().

  Added ./configure option '--disable-gex-new' to allow using the older
  group-exchange format

  Added MAC methods hmac-md5 and hmac-md5-96.

Version 0.4
-----------

  Fixed crash when trying to free sftp_dirhandle data from a filehandle struct.

  Fixed leak in sftp_open_ex(), handle->handle not freed in handle_close().

  Fixed leak in sftp_symlink_ex(), result for READLINK and REALPATH not freed unless there was an error.

  Added libssh2_banner_set(), specify an arbitrary banner to send on introduction.

Version 0.3
-----------

  Fixed libssh2_channel_read_ex().  Packet loop initialized BEFORE transport polled for new packets (should have been after).

  Fixed blocking issues in scp_send()/scp_recv().

  Fixed degree of indirection in macerror callback.

  Changed packet read mechanism to use a fixed buffer and avoid unnecessary alloc/free calls. (especially while non-block looping)

  Added channel close callback.

  Added SFTP support (Using its own header file: libssh2_sftp.h)

Version 0.2
-----------

  Changed extended data ignorance mechanism:
    libssh2_channel_ignore_extended_data() changed to libssh2_channel_handle_extended_data()
    Macro introduced for backward compatability during beta phase.
    *** THE LIBSSH2_CHANNEL_IGNORE_EXTENDED_DATA() MACRO WILL BE REMOVED PRIOR TO 1.0 RELEASE ***
    libssh2_channel_handle_extended_data() may be passed one of three "ignore_mode" constants
      LIBSSH2_CHANNEL_EXTENDED_DATA_NONE       Default behavior, queue ED packets and return them with read_ex
      LIBSSH2_CHANNEL_EXTENDED_DATA_IGNORE     Equivalent to libssh2_channel_ignore_extended_data()
                                               IGNORE will implicitly flush the extended data stream(s)
      LIBSSH2_CHANNEL_EXTENDED_DATA_MERGE      Calls to channel_read() will check both the standard data stream
                                               and the extended data stream(s) for the first available packet

  Changed libssh2_session_disconnect_ex() to return an error code when alloc fails

  Added libssh2_channel_flush_ex() and basic macros: ..._flush() ..._flush_stderr()
    flush_ex accepts either the streamid (0 for standard data, 1 for stderr) or one of the two following constants:
      LIBSSH2_CHANNEL_FLUSH_ALL                Flush all streams
      LIBSSH2_CHANNEL_FLUSH_EXTENDED_DATA      Flush all streams EXCEPT the standard data stream

  Added libssh2_session_callback_set() for setting ignore/debug/disconnect/macerror callbacks

  Added libssh2_session_method_pref() to selectively set methods and method preferences.

  Added libssh2_session_methods() to determine what methods were negotiated.

  Added libssh2_session_abstract() for retreiving &session->abstract

  Added libssh2_session_last_error() for retreiving error codes/messages

Version 0.1
-----------

  Initial Release:
    KEX methods: diffie-hellman-group14-sha1, diffie-hellman-group-exchange-sha1, diffie-hellman-group1-sha1
    Hostkey methods: ssh-rsa, ssh-dss
    Cipher methods: aes256-cbc, rijndael-cbc@lysator.liu.se, aes192-cbc, aes128-cbc, blowfish-cbc, arcfour, cast128-cbc, 3des-cbc, none*
    Compression methods: zlib, none
    MAC methods: hmac-sha1, hmac-sha1-96, hmac-ripemd160, hmac-ripemd160@openssh.com none*
    *Cipher/MAC "none" is disabled by default for security purposes,
     Use --enable-crypt-none and/or --enable-mac-none with ./configure to enable