in reply to Re^2: Weird error with Cryprt::Blowfish and Crypt::DES
in thread Weird error with Cryprt::Blowfish and Crypt::DES

Thank you soooo much. I worked hours on that problem without finding a reason or solution for that. I read my plaintext string from a xml file and "utf8::downgrade($data);" did the trick.
  • Comment on Re^3: Weird error with Cryprt::Blowfish and Crypt::DES

Replies are listed 'Best First'.
Re^4: Weird error with Cryprt::Blowfish and Crypt::DES
by Anonymous Monk on Aug 28, 2008 at 19:45 UTC
    Thanks... How to apply the explanation wasn't total clear to me since I was originally try to hack up the DES.pm to find where the data was being passed incorrectly before I found this thread. Attached is a clear example: 
            use utf8;
        my $username    = $connection->{'username'};
        my $password    = $connection->{'password'};
        my $ip          = $connection->{'ip'};

        chomp( $username , $password , $ip );

        utf8::downgrade($username);
        utf8::downgrade($password);

        my $ssh = Net::SSH::Perl->new($ip ,
                port => 'ssh'
                );

        $ssh->login($username, $password);

        my($out, $err) = $ssh->cmd($cmd || "ls -l");
        print $out;

    [download]
[reply]
[d/l]
Re^4: Weird error with Cryprt::Blowfish and Crypt::DES
by Anonymous Monk on Mar 03, 2009 at 11:33 UTC
    I am having this exact same problem, but don't understand how you implemeneted your fix. Where are you adding 'utf8::downgrade' because when I add it to the data I send as the username to Net::SSH::Perl it sends the data as '1'. I know this is an old thread but hopefully someone will know what I need to do to fix this. Thanks
[reply]
[reply]
        Thanks for the reply.
        I tried that but adding the utf8::downgrade only made my variable change to '1'.
        Here is my code 
        use Net::SSH::Perl;
use XML::Simple;

do "routines/Log.pm";

my $c_rsync = "$Bin/conf/plugins/rsync.xml";

unless (-e "$c_rsync" ) {
    Log ( $l_plugin , "no config file was found, exiting" );
    exit;
}

my $xml_conf = eval { XMLin ( $c_rsync , ForceArray => [ 'rsync' ] , K
+eyAttr => {} , KeepRoot => 0 ) };
if ($@) {
    Log ( $l_plugin , "failed to load plugin \'rsync\' xml.\nReason: $
+@" );
    exit;
}

my ( @rFolder , @rUser , @rIp , @rHome , @rProxy );
foreach (@{ $xml_conf -> {'plugin'} -> {'rsync'} }) {

    push ( @rFolder , $_ -> {'loc'} );
    push ( @rUser , $_ -> {'uname'} );
    push ( @rIp , $_ -> {'ip'} );
    push ( @rHome , $_ -> {'fol'} );

    if ( defined ( $_ -> {'proxy'} ) ) {
        push ( @rProxy , $_ -> {'proxy'} );
    } else {
        push ( @rProxy , 0 );
    }
}

my $cV = 0;
foreach ( @rFolder ) {
my $rSsh = Net::SSH::Perl -> new ( $rIp[$cV] , protocol => '2,1' , ide
+ntity_files => [ "/root/rsync/$rUser[$cV]-rsync-key" ] , debug => 1 )
+;

$rSsh -> login ( $rUser[$cV] );

my ( $oMsg , $oErr , $oExit ) = $rSsh -> cmd ( "du" );
print "$oMsg";

$cV++;
}
exit;

        [download]
        I removed the parts not related to the Net::SSH::Perl stuff.
        The code works great when I replace $rSsh -> login ( $rUser[$cV] ); with $rSsh -> login ( 'yams-dev' );
        and $rUser[$cV] is definatley giving 'yams-dev' without any newlines on the end or anything odd like that.
        This is the debug output I'm getting: 
        suse-build: Reading configuration data /root/.ssh/config
suse-build: Reading configuration data /etc/ssh_config
suse-build: Allocated local port 1022.
suse-build: Connecting to 87.117.247.76, port 22.
suse-build: Remote protocol version 1.99, remote software version Open
+SSH_3.4p1
suse-build: Net::SSH::Perl Version 1.34, protocol version 2.0.
suse-build: No compat match: OpenSSH_3.4p1.
suse-build: Connection established.
suse-build: Sent key-exchange init (KEXINIT), wait response.
suse-build: Algorithms, c->s: 3des-cbc hmac-sha1 none
suse-build: Algorithms, s->c: 3des-cbc hmac-sha1 none
suse-build: Entering Diffie-Hellman Group 1 key exchange.
suse-build: Sent DH public key, waiting for reply.
suse-build: Received host key, type 'ssh-dss'.
suse-build: Host '87.117.247.76' is known and matches the host key.
suse-build: Computing shared secret key.
suse-build: Verifying server signature.
suse-build:/home/matt/rsync # perl rsync.pm
suse-build: Waiting for NEWKEYS message.
suse-build: Send NEWKEYS.
suse-build: Enabling encryption/MAC/compression.
suse-build: Sending request for user-authentication service.
suse-build: Service accepted: ssh-userauth.
suse-build: Trying empty user-authentication request.
input must be 8 bytes long at /usr/lib/perl5/site_perl/5.8.8/i586-linu
+x-thread-multi/Crypt/DES.pm line 56.

        [download]
[reply]
[d/l]
[select]
        Thanks for the reply (sorry for the dupe post, my first was made anon and I realised I had a couple of errors in the copy/paste).
        I tried that but adding the utf8::downgrade only made my variable change to '1'.
        Here is my code 
        use Net::SSH::Perl;
use XML::Simple;

do "routines/Log.pm";

my $c_rsync = "$Bin/conf/plugins/rsync.xml";

unless (-e "$c_rsync" ) {
    Log ( $l_plugin , "no config file was found, exiting" );
    exit;
}

my $xml_conf = eval { XMLin ( $c_rsync , ForceArray => [ 'rsync' ] , K
+eyAttr => {} , KeepRoot => 0 ) };
if ($@) {
    Log ( $l_plugin , "failed to load plugin \'rsync\' xml.\nReason: $
+@" );
    exit;
}

my ( @rFolder , @rUser , @rIp , @rHome , @rProxy );
foreach (@{ $xml_conf -> {'plugin'} -> {'rsync'} }) {

    push ( @rFolder , $_ -> {'loc'} );
    push ( @rUser , $_ -> {'uname'} );
    push ( @rIp , $_ -> {'ip'} );
    push ( @rHome , $_ -> {'fol'} );

    if ( defined ( $_ -> {'proxy'} ) ) {
        push ( @rProxy , $_ -> {'proxy'} );
    } else {
        push ( @rProxy , 0 );
    }
}

my $cV = 0;
foreach ( @rFolder ) {
my $rSsh = Net::SSH::Perl -> new ( $rIp[$cV] , protocol => '2,1' , ide
+ntity_files => [ "/root/rsync/$rUser[$cV]-rsync-key" ] , debug => 1 )
+;

$rSsh -> login ( $rUser[$cV] );

my ( $oMsg , $oErr , $oExit ) = $rSsh -> cmd ( "du" );
print "$oMsg";

$cV++;
}
exit;

        [download]
        I removed the parts not related to the Net::SSH::Perl stuff.
        The code works great when I replace $rSsh -> login ( $rUser[$cV] ); with $rSsh -> login ( 'yams-dev' );
        and $rUser[$cV] is definatley giving 'yams-dev' without any newlines on the end or anything odd like that.
        This is the debug output I'm getting: 
        suse-build: Reading configuration data /root/.ssh/config
suse-build: Reading configuration data /etc/ssh_config
suse-build: Allocated local port 1022.
suse-build: Connecting to **.117.247.**, port 22.
suse-build: Remote protocol version 1.99, remote software version Open
+SSH_3.4p1
suse-build: Net::SSH::Perl Version 1.34, protocol version 2.0.
suse-build: No compat match: OpenSSH_3.4p1.
suse-build: Connection established.
suse-build: Sent key-exchange init (KEXINIT), wait response.
suse-build: Algorithms, c->s: 3des-cbc hmac-sha1 none
suse-build: Algorithms, s->c: 3des-cbc hmac-sha1 none
suse-build: Entering Diffie-Hellman Group 1 key exchange.
suse-build: Sent DH public key, waiting for reply.
suse-build: Received host key, type 'ssh-dss'.
suse-build: Host '87.117.247.76' is known and matches the host key.
suse-build: Computing shared secret key.
suse-build: Verifying server signature.
suse-build: Waiting for NEWKEYS message.
suse-build: Send NEWKEYS.
suse-build: Enabling encryption/MAC/compression.
suse-build: Sending request for user-authentication service.
suse-build: Service accepted: ssh-userauth.
suse-build: Trying empty user-authentication request.
input must be 8 bytes long at /usr/lib/perl5/site_perl/5.8.8/i586-linu
+x-thread-multi/Crypt/DES.pm line 56.

        [download]
[reply]
[d/l]
[select]

In Section Seekers of Perl Wisdom