Trying to upload a file to a different server using PHP. It connects with ssh_connect() successfully, but when I include ssh2_scp_send the page that is displayed is blank (as though there is a syntax error), and it certainly did not upload the file. Any idea why this may be? I'd prefer to use PHP, but if it doesn't work I suppose I could make a system call to CLI scp with private key files, but I'd prefer not to do that. Alternative suggestions are welcomed.
Info: debian w/apache
Installed: libssh2-1-dev libssh2-php php-pear php5-dev; pecl install -f ssh2
$ssh = ssh2_connect('localhost', 22);
ssh2_auth_password($ssh, 'user', 'password');
ssh2_scp_send($ssh, 'original', 'destination'); # does not work
ssh2_exec($ssh, 'exit'); #does not help
Any ideas?
Personally, I'd recommend using phpseclib, a pure PHP SFTP implementation:
<?php
include('Net/SFTP.php');
$sftp = new Net_SFTP('www.domain.tld');
if (!$sftp->login('username', 'password')) {
exit('Login Failed');
}
echo $sftp->pwd() . "\r\n";
$sftp->put('filename.ext', 'hello, world!');
print_r($sftp->nlist());
?>
Chief among libssh2's problems is the fact that it's not easy to install. The original authors have abandoned it. The source code on php.net requires modification for it to even compile and although you can install it with apt-get on Ubuntu right now what happens when it requires more than just two new lines to work? And what if the Linux box you're trying to get it working on isn't Ubuntu?
If you ever need to create a new server on which to host your website you don't want to be stuck spending hours on a bunch of esoteric dependencies.
Related
I do as some material say.
1. download php extension ssh2 from
http://windows.php.net/downloads/pecl/releases/ssh2/0.12/
i select php_ssh2-0.12-5.4-ts-vc9-x86.zip to download.
2. extract the downloaded file
there are thress files :libssh2.dll、php_ssh.dll、php_ssh2.pdb .
3. save php_ssh.dll and php_ssh2.pdb in the php/ext/.
4. save libssh2.dll in the c:/windows/system32 and c:/windows/syswow64 .
5. edit php.ini
to add a line: extension=php_ssh2.dll
6. reboot apache .
But there is no ssh2 info in my output of phpinfo().
Why can't install php-ssh2 on my win7?
Trying to use libssh2 is a PITA as you're finding out. I'd just use phpseclib, a pure PHP SSH implementation. Example:
<?php
include('Net/SSH2.php');
$ssh = new Net_SSH2('www.domain.tld');
if (!$ssh->login('username', 'password')) {
exit('Login Failed');
}
echo $ssh->exec('pwd');
echo $ssh->exec('ls -la');
?>
It has a number of advantages over libssh2:
http://phpseclib.sourceforge.net/ssh/compare.html
I am working on a game-server hosting panel and I've been tried this:
$ssh = ssh2_connect('xx.xx.xx.xx', 22);
if(ssh2_auth_password($ssh, 'user', 'userpass'))
{
echo 'Success';
}
else
{
die('Fail');
}
But its just doesn't show any message (Success/Fail).
How can I make this connection work? ><
you probably do not have the libssh2 extension installed. it is a pretty big pain to install it so i will recommend you use this tool:
https://github.com/phpseclib/libssh2-compatibility-layer
include it at top of file and all your libssh2 function calls should work even if libssh2 is not installed.
I've been trying to install the SSH2 libraries for php onto a web server running CentOS 5 with PHP 5.1.6 and was able to successfully install all the dependencies, but after restarting the web server I get the following error:
PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/ssh2.so' - libssh2.so.1: cannot open shared object file: No such file or directory in Unknown on line 0
Has anyone run into this before? The ssh2.so file exists at '/usr/lib64/php/modules/ssh2.so' and has the same file permissions as all the other extensions (-rwxr-xr-x).
Thanks
The key to the error is this:
libssh2.so.1: cannot open shared object file: No such file or directory
Your ssh2.so file can't find it. Run this and you'll see what I mean:
ldd /usr/lib64/php/modules/ssh2.so
Try this:
updatedb
locate libssh2.so.1
If found, you may need to create a symlink inside /usr/lib64/ or something.
If that doesn't find it, a quick google search brings up this as a hit for libssh2 on centos5:
http://centos.karan.org/el5/extras/testing/x86_64/RPMS/libssh2-0.18-10.el5.kb.x86_64.rpm
Install that, restart apache, and try it again.
Maybe phpseclib, a pure PHP SSH implementation, would work better for you? An example:
<?php
include('Net/SSH2.php');
$ssh = new Net_SSH2('www.domain.tld');
if (!$ssh->login('username', 'password')) {
exit('Login Failed');
}
echo $ssh->exec('pwd');
echo $ssh->exec('ls -la');
?>
What i need to do if next code gives me seg fault ?
$handle = opendir("ssh2.sftp://$sftp".'/usr/bin/');
$file = readdir($handle);
closedir($handle);
where $sftp is
$this->_connection = ssh2_connect($this->_server, 22);
if($this->_authType==ExportInterface::CONN_AUTH_KEY) {
ssh2_auth_pubkey_file($this->_connection,$this->_user,$this->_key,$this->_privateKey);
} else {
ssh2_auth_password($this->_connection,$this->_user,$this->_password);
}
$sftp = ssh2_sftp($this->_connection);
Connect work well. and segfault is when only i use readdir function.
I'm answering this old question due to high ranking on Google search. I was experiencing the same segmentation fault and the real solution wasn't here.
It turns out that since PHP 5.6, the behavior of the function ssh2_sftp changed and is now returning a resource that doesn't allow to be concatenated as a string to form filesystem paths.
So, once you have the return of the ssh2_sftp, you have first to pass it through intval in order to build the remote file path:
$sftp = ssh2_sftp($this->_connection);
$handle = opendir('ssh2.sftp://' . intval($sftp) . '/usr/bin/');
$file = readdir($handle);
closedir($handle);
You are welcome.
I had the same problem and I solved it upgrading the ssh2 pecl packaage to version 0.11.3
sudo pecl install ssh2 channel://pecl.php.net/ssh2-0.11.3
It worked for me after some problems.
Regards
A seg(mentation) fault is an internal error in php or the SSH/SFTP extension. You should file a bug against the extension in question.
Don't forget to include a short, reproducible example. Since this may be only reproducible with your specific combination of ssh client and server, you should reproduce the bug first in a brand-new VM and record every step you make, like this:
Install Ubuntu 11.04 amd64 in the VM
Install ssh with $ sudo apt-get install ssh
Configure ssh with ...
Install php with $ sudo apt-get install php5-cli
Copy the script [link to http://pastebin.com/ here] to the VM
Type php ssh-segfault.php and receive a segfault.
Not applicable to the OP's situation, but if you fail to call closedir explicitly on the handle created by opendir, you'll also get a segfault during PHP internal cleanup at script end.
I had a similar problem, though with some additional factors. I'll start with the solution: use absolute paths, rather than relative. And avoid the ~.
As for my findings. Take this script:
#!/usr/bin/php
<?php
$ssh = ssh2_connect('hostname.example.com');
$res = ssh2_auth_pubkey_file($ssh, 'user', '~/.ssh/various-keys/special-key_2015.pub', '~/.ssh/various-keys/special-key_2015');
unset($res); unset($ssh);
$ssh = ssh2_connect('hostname.example.com');
$res = ssh2_auth_pubkey_file($ssh, 'user', '~/.ssh/various-keys/special-key_2015.pub', '~/.ssh/various-keys/special-key_2015');
Results in an authentication error in the 2nd ssh2_auth_pubkey_file call. A bit strange to encounter, after two identical calls - but easy enough to analyze.
But having the rest of my application code around it would result in the segfault. Eventually I narrowed it down to that that including a file, that defines a function that uses the __FILE__ constant changes the error to turn into a segmentation fault.
Even a file as simple as this:
<?php
function nothing() {
error_log(__FILE__);
}
I hope this helps somebody else at some point...
One of the answers above suggests you need to cast the resource to an int intval($sftp) to avoid the segfault.
While I believe this used to be the case, this now appears to have inverted, at least on php 7.1.9 and casting to an int now causes the segfault, at least with file_put_contents:
$connection = ssh2_connect($host, $port);
$sftp = ssh2_sftp($connection);
$remoteFile = 'ssh2.sftp://' . intval($sftp) . '/var/file.text'
echo $remoteFile
file_put_contents($remoteFile, 'Content');
ssh2.sftp://2675/var/file.text
Segmentation Fault
Without a cast it works:
$connection = ssh2_connect($host, $port);
$sftp = ssh2_sftp($connection);
$remoteFile = 'ssh2.sftp://' . $sftp . '/var/file.text'
echo $remoteFile
file_put_contents($remoteFile, 'Content');
ssh2.sftp://Resource id #2675/var/file.text
I'm having trouble using PHP to SFTP upload files to a remote server. When I use cURL, I'm getting the error described here:
SFTP from PHP - undefined constant CURLOPT_PROTOCOLS and CURLPROTO_SFTP?
I also tried phpseclib as suggested in:
SFTP from within PHP
But when i try phpseclib, i get these errors:
Warning: require_once(Math/BigInteger.php) [function.require-once]: failed to open stream: No such file or directory in /home/john/public_html/test/Net/SSH2.php on line 53
Fatal error: require_once() [function.require]: Failed opening required 'Math/BigInteger.php' (include_path='.:/usr/share/php:/usr/share/pear') in /home/john/public_html/test/Net/SSH2.php on line 53
I then tried using system commands in php like so, but nothing happened:
<?php
echo system('sftp user#ftp.domain.com');
echo system('password');
echo system('put file.csv');
?>
I also tried
<?php
$connection = ssh2_connect('shell.example.com', 22);
ssh2_auth_password($connection, 'username', 'password');
ssh2_scp_send($connection, '/local/filename', '/remote/filename', 0644);
?>
but my php server says ss2_connect is not defined.
I tried to do the following from terminal
scp file.csv user#ftp.remote.com
password
But the server does not allow scp command. I do not have shell access to create ssh keys.
All i can do right now is sftp from terminal and manually upload. But I really want to automate this so a PHP website can do all this.
There aren't many tutorials on how to SFTP upload from PHP. Is it because it's a bad thing to do? If so, what should I be doing? The server I want to upload to only allows sftp connections.
http://phpseclib.sourceforge.net/documentation/intro.html#intro_usage_correct
Per that, phpseclib's root directory needs to be in your include_path. From that page:
<?php
set_include_path(get_include_path() . PATH_SEPARATOR . 'phpseclib');
include('Net/SFTP.php');
?>
You should really familiarize yourself with this kind of include technique - it's pretty standard for PEAR libraries and Zend ones.
but my php server says ss2_connect is not defined.
For this error, you should install ssh2 extension on your server's php.
Use the built in SSH library. Using the scp function will be easier than initiating a sftp session too.
http://www.php.net/manual/en/function.ssh2-scp-send.php
To use system command you have to:
Configure password-less ssh
Run command like scp filename1 userid#hostname:filename2, check man scp. You can do the same with sftp but with some other options
You can use Pure-PHP implementation of SSHv2 library.
Here are some examples of how to use this library:
<?php
include 'vendor/autoload.php';
$ssh = new \phpseclib\Net\SSH2('www.domain.tld');
if (!$ssh->login('username', 'password')) {
exit('Login Failed');
}
echo $ssh->exec('pwd');
echo $ssh->exec('ls -la');
?>
And:
<?php
include 'vendor/autoload.php';
$key = new \phpseclib\Crypt\RSA();
//$key->setPassword('whatever');
$key->loadKey(file_get_contents('privatekey'));
$ssh = new \phpseclib\Net\SSH2('www.domain.tld');
if (!$ssh->login('username', $key)) {
exit('Login Failed');
}
echo $ssh->read('username#username:~$');
$ssh->write("ls -la\n");
?>