Doc #72897 [Opn]: The client to server MAC algorithm list is truncated when I call ssh2_connect

Edit report at https://bugs.php.net/bug.php?id=72897&edit=1 ID: 72897 User updated by: benjamin dot cohen-solal at dalenys dot com Reported by: benjamin dot cohen-solal at dalenys dot com -Summary: The client to server MAC algorithm list is truncated +Summary: The client to server MAC algorithm list is truncated when I call ssh2_connect Status: Open Type: Documentation Problem Package: ssh2 Operating System: Debian 8 PHP Version: 5.6.25 Block user comment: N Private report: N New Comment: Add precision on title Previous Comments: ------------------------------------------------------------------------ [2016-08-19 13:18:44] benjamin dot cohen-solal at dalenys dot com Description: ------------ When I send the following algorithm list in client to server / mac field: hmac-sha2-256,hmac-sha2-512,umac-64@openssh.com I receive the error message: ben@debian:~$ php script.php PHP Warning: ssh2_connect(): Error starting up SSH connection(-5): Unable to exchange encryption keys in /home/ben/scriptphp on line 3 PHP Stack trace: PHP 1. {main}() /home/ben/script.php:0 PHP 2. ssh2_connect() /home/ben/script.php:3 I successfully configured a ProFTPd server on my server on port 443 and when I check its logs, I get the following error: 2016-08-17 14:53:36,048 mod_sftp/0.9.9[9930]: no shared client-to-server MAC algorithm found (client sent 'hmcom', server sent 'hmac-sha2-256,hmac-sha2-512,umac-64@openssh.com') I never sent the "hmcom" value, it seems to have truncated the 2 first letters and the 3 last ones from my algorithm list: hmac-sha2-256,hmac-sha2-512,umac-64@openssh.com because for example if I changed the ".com" into ".cot", I get the error: 2016-08-17 14:53:36,048 mod_sftp/0.9.9[9930]: no shared client-to-server MAC algorithm found (client sent 'hmcot', server sent 'hmac-sha2-256,hmac-sha2-512,umac-64@openssh.com') When I use the binary file sftp with shell_exec as following: sftp -P 443 myhost.com All is OK --- From manual page: http://www.php.net/function.ssh2-connect --- Test script: --------------- <?php ssh2_connect("myhost.com", 443, array( "client_to_server" => array( "mac" => 'hmac-sha2-256,hmac-sha2-512,umac-64@openssh.com' ), ) ); Expected result: ---------------- I don't expect any error message Actual result: -------------- I get the following error: PHP Warning: ssh2_connect(): Error starting up SSH connection(-5): Unable to exchange encryption keys in /home/ben/script.php on line 3 PHP Stack trace: PHP 1. {main}() /home/bcohen/toto.php:0 PHP 2. ssh2_connect() /home/bcohen/toto.php:3 PHP Warning: ssh2_connect(): Unable to connect to myhost.com in /home/ben/script.php on line 3 PHP Stack trace: PHP 1. {main}() /home/ben/script.php:0 PHP 2. ssh2_connect() /home/ben/script.php:3 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72897&edit=1