[Ssh-sftp-perl-users] Running a Net::SSH::Perl script via a Web server

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Hi,

I've having a problem running a Net::SSH::Perl script via a Web server. I'm
using iPlanet Web Server 4.1 (don't laugh), but the problem also exists in
Apache 1.3.27. Both servers are on a Solaris 8 box. Here's the script I'm
using:

#!/usr/local/bin/perl

use Net::SSH::Perl;

print "Content-type: text/plain\n\n\n";

$i = `id`;
print "id is $i\n";

$ename = "server1";
$elogin = "root";
print "Connecting\n";
$ssh = Net::SSH::Perl->new($ename, debug => 1,protocol => 2, identity_files
=> ["/usr/netscape/.ssh/id_dsa"], options => ["BatchMode yes", "IdentityFile
/usr/netscape/.ssh/id_dsa"]);
print "Logging in\n";
$ssh->login($elogin)";
$tdir = "/tmp";
($res,$err, $exit) = $ssh->cmd("cd $tdir");
if ($exit gt 0) {
  print "cd /tmp failed with:\n\n$err\n";
} else {
  print "cd worked\n";
}
($res,$err,$exit) = $ssh->cmd("ls");
if ($exit gt 0) {
  print "ls failed with:\n\n$err\n";
} else {
  print "ls worked\n";
}
($res,$err, $exit) = $ssh->cmd("pwd");
if ($exit gt 0) {
  print "pwd failed with:\n\n$err\n";
} else {
  print "pwd worked\n";
}

If I run this script as the user netscape from the command line I get:

Content-type: text/plain

id is uid=100(netscape) gid=101(netscape)

pwd is /usr/netscape/server4.1/docs/bussnet/cgi-bin

Connecting
host-not-web01: Reading configuration data /usr/netscape/.ssh/config
host-not-web01: Reading configuration data /etc/ssh_config
host-not-web01: Connecting to server1, port 22.
host-not-web01: Remote protocol version 2.0, remote software version
OpenSSH_3.4p1
host-not-web01: Net::SSH::Perl Version 1.28, protocol version 2.0.
host-not-web01: No compat match: OpenSSH_3.4p1.
host-not-web01: Connection established.
Logging in
host-not-web01: Sent key-exchange init (KEXINIT), wait response.
host-not-web01: Algorithms, c->s: 3des-cbc hmac-sha1 none
host-not-web01: Algorithms, s->c: 3des-cbc hmac-sha1 none
host-not-web01: Entering Diffie-Hellman Group 1 key exchange.
host-not-web01: Sent DH public key, waiting for reply.
host-not-web01: Received host key, type 'ssh-dss'.
host-not-web01: Host 'server1' is known and matches the host key.
host-not-web01: Computing shared secret key.
host-not-web01: Verifying server signature.
host-not-web01: Waiting for NEWKEYS message.
host-not-web01: Enabling incoming encryption/MAC/compression.
host-not-web01: Send NEWKEYS, enable outgoing encryption/MAC/compression.
host-not-web01: Sending request for user-authentication service.
host-not-web01: Service accepted: ssh-userauth.
host-not-web01: Trying empty user-authentication request.
host-not-web01: Authentication methods that can continue:
publickey,password,keyboard-interactive.
host-not-web01: Next method to try is publickey.
host-not-web01: Trying pubkey authentication with key file
'/usr/netscape/.ssh/id_dsa'
host-not-web01: Login completed, opening dummy shell channel.
host-not-web01: channel 0: new [client-session]
host-not-web01: Requesting channel_open for channel 0.
host-not-web01: channel 0: open confirm rwindow 0 rmax 32768
host-not-web01: Got channel open confirmation, requesting shell.
host-not-web01: Requesting service shell on channel 0.
host-not-web01: channel 1: new [client-session]
host-not-web01: Requesting channel_open for channel 1.
host-not-web01: Entering interactive session.
host-not-web01: Sending command: cd /tmp
host-not-web01: Requesting service exec on channel 1.
host-not-web01: channel 1: open confirm rwindow 0 rmax 32768
host-not-web01: input_channel_request: rtype exit-status reply 0
host-not-web01: channel 1: rcvd eof
host-not-web01: channel 1: output open -> drain
host-not-web01: channel 1: rcvd close
host-not-web01: channel 1: input open -> closed
host-not-web01: channel 1: close_read
host-not-web01: channel 1: obuf empty
host-not-web01: channel 1: output drain -> closed
host-not-web01: channel 1: close_write
host-not-web01: channel 1: send close
host-not-web01: channel 1: full closed
cd worked
host-not-web01: channel 2: new [client-session]
host-not-web01: Requesting channel_open for channel 2.
host-not-web01: Entering interactive session.
host-not-web01: Sending command: ls
host-not-web01: Requesting service exec on channel 2.
host-not-web01: channel 2: open confirm rwindow 0 rmax 32768
host-not-web01: channel 2: rcvd eof
host-not-web01: channel 2: output open -> drain
host-not-web01: input_channel_request: rtype exit-status reply 0
host-not-web01: channel 2: rcvd close
host-not-web01: channel 2: input open -> closed
host-not-web01: channel 2: close_read
host-not-web01: channel 2: obuf empty
host-not-web01: channel 2: output drain -> closed
host-not-web01: channel 2: close_write
host-not-web01: channel 2: send close
host-not-web01: channel 2: full closed
ls worked
host-not-web01: channel 3: new [client-session]
host-not-web01: Requesting channel_open for channel 3.
host-not-web01: Entering interactive session.
host-not-web01: Sending command: pwd
host-not-web01: Requesting service exec on channel 3.
host-not-web01: channel 3: open confirm rwindow 0 rmax 32768
host-not-web01: channel 3: rcvd eof
host-not-web01: channel 3: output open -> drain
host-not-web01: input_channel_request: rtype exit-status reply 0
host-not-web01: channel 3: rcvd close
host-not-web01: channel 3: input open -> closed
host-not-web01: channel 3: close_read
host-not-web01: channel 3: obuf empty
host-not-web01: channel 3: output drain -> closed
host-not-web01: channel 3: close_write
host-not-web01: channel 3: send close
host-not-web01: channel 3: full closed
pwd worked

If I run the same script from the web server (by putting it in the cgi-bin
directory), which is running as the netscape user, I get:

host-not-web01: Reading configuration data /.ssh/config
host-not-web01: Reading configuration data /etc/ssh_config
host-not-web01: Connecting to server1, port 22.
host-not-web01: Remote protocol version 2.0, remote software version
OpenSSH_3.4p1
host-not-web01: Net::SSH::Perl Version 1.28, protocol version 2.0.
host-not-web01: No compat match: OpenSSH_3.4p1.
host-not-web01: Connection established.
host-not-web01: Sent key-exchange init (KEXINIT), wait response.
host-not-web01: Algorithms, c->s: 3des-cbc hmac-sha1 none
host-not-web01: Algorithms, s->c: 3des-cbc hmac-sha1 none
host-not-web01: Entering Diffie-Hellman Group 1 key exchange.
host-not-web01: Sent DH public key, waiting for reply.
host-not-web01: Received host key, type 'ssh-dss'.
host-not-web01: Permanently added 'server1' to the list of known hosts.
Can't write to /.ssh/known_hosts2: Permission denied at
/usr/local/lib/perl5/site_perl/5.8.0/Net/SSH/Perl.pm line 380
id is uid=100(netscape) gid=101(netscape)

pwd is /usr/netscape/server4.1/docs/bussnet/cgi-bin

Connecting
Logging in

The problem seems to be that the Net::SSH::Perl thinks it's running as root
and so tries to access the /.ssh/known_hosts2 file.

Does anyone know why this happens?

Regards,

Mark

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