428 lines
12 KiB
Perl
428 lines
12 KiB
Perl
#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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#***************************************************************************
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package sshhelp;
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use strict;
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use warnings;
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BEGIN {
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use base qw(Exporter);
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our @EXPORT_OK = qw(
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$sshdexe
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$sshexe
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$sftpsrvexe
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$sftpexe
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$sshkeygenexe
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$sshdconfig
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$sshconfig
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$sftpconfig
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$knownhosts
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$sshdlog
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$sshlog
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$sftplog
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$sftpcmds
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$hstprvkeyf
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$hstpubkeyf
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$hstpubmd5f
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$hstpubsha256f
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$cliprvkeyf
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$clipubkeyf
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display_sshdconfig
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display_sshconfig
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display_sftpconfig
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display_sshdlog
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display_sshlog
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display_sftplog
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dump_array
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find_sshd
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find_ssh
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find_sftpsrv
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find_sftp
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find_sshkeygen
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find_httptlssrv
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sshversioninfo
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);
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}
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use File::Spec;
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use pathhelp qw(
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exe_ext
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);
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#***************************************************************************
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# Global variables initialization
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#
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our $sshdexe = 'sshd' .exe_ext('SSH'); # base name and ext of ssh daemon
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our $sshexe = 'ssh' .exe_ext('SSH'); # base name and ext of ssh client
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our $sftpsrvexe = 'sftp-server' .exe_ext('SSH'); # base name and ext of sftp-server
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our $sftpexe = 'sftp' .exe_ext('SSH'); # base name and ext of sftp client
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our $sshkeygenexe = 'ssh-keygen' .exe_ext('SSH'); # base name and ext of ssh-keygen
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our $httptlssrvexe = 'gnutls-serv' .exe_ext('SSH'); # base name and ext of gnutls-serv
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our $sshdconfig = 'curl_sshd_config'; # ssh daemon config file
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our $sshconfig = 'curl_ssh_config'; # ssh client config file
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our $sftpconfig = 'curl_sftp_config'; # sftp client config file
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our $sshdlog = undef; # ssh daemon log file
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our $sshlog = undef; # ssh client log file
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our $sftplog = undef; # sftp client log file
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our $sftpcmds = 'curl_sftp_cmds'; # sftp client commands batch file
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our $knownhosts = 'curl_client_knownhosts'; # ssh knownhosts file
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our $hstprvkeyf = 'curl_host_rsa_key'; # host private key file
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our $hstpubkeyf = 'curl_host_rsa_key.pub'; # host public key file
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our $hstpubmd5f = 'curl_host_rsa_key.pub_md5'; # md5 hash of host public key
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our $hstpubsha256f = 'curl_host_rsa_key.pub_sha256'; # sha256 hash of host public key
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our $cliprvkeyf = 'curl_client_key'; # client private key file
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our $clipubkeyf = 'curl_client_key.pub'; # client public key file
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#***************************************************************************
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# Absolute paths where to look for sftp-server plugin, when not in PATH
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#
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our @sftppath = qw(
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/usr/lib/openssh
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/usr/libexec/openssh
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/usr/libexec
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/usr/local/libexec
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/opt/local/libexec
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/usr/lib/ssh
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/usr/libexec/ssh
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/usr/sbin
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/usr/lib
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/usr/lib/ssh/openssh
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/usr/lib64/ssh
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/usr/lib64/misc
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/usr/lib/misc
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/usr/local/sbin
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/usr/freeware/bin
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/usr/freeware/sbin
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/usr/freeware/libexec
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/opt/ssh/sbin
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/opt/ssh/libexec
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);
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#***************************************************************************
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# Absolute paths where to look for httptlssrv (gnutls-serv), when not in PATH
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#
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our @httptlssrvpath = qw(
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/usr/sbin
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/usr/libexec
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/usr/lib
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/usr/lib/misc
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/usr/lib64/misc
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/usr/local/bin
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/usr/local/sbin
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/usr/local/libexec
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/opt/local/bin
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/opt/local/sbin
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/opt/local/libexec
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/usr/freeware/bin
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/usr/freeware/sbin
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/usr/freeware/libexec
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/opt/gnutls/bin
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/opt/gnutls/sbin
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/opt/gnutls/libexec
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);
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#***************************************************************************
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# Create or overwrite the given file with lines from an array of strings
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#
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sub dump_array {
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my ($filename, @arr) = @_;
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my $error;
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if(!$filename) {
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$error = 'Error: Missing argument 1 for dump_array()';
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}
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elsif(open(my $textfh, ">", $filename)) {
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foreach my $line (@arr) {
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$line .= "\n" if($line !~ /\n$/);
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print $textfh $line;
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}
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if(!close($textfh)) {
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$error = "Error: cannot close file $filename";
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}
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}
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else {
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$error = "Error: cannot write file $filename";
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}
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return $error;
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}
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#***************************************************************************
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# Display contents of the given file
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#
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sub display_file {
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my $filename = $_[0];
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print "=== Start of file $filename\n";
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if(open(my $displayfh, "<", "$filename")) {
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while(my $line = <$displayfh>) {
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print "$line";
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}
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close $displayfh;
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}
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print "=== End of file $filename\n";
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}
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#***************************************************************************
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# Display contents of the ssh daemon config file
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#
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sub display_sshdconfig {
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display_file($sshdconfig);
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}
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#***************************************************************************
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# Display contents of the ssh client config file
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#
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sub display_sshconfig {
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display_file($sshconfig);
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}
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#***************************************************************************
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# Display contents of the sftp client config file
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#
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sub display_sftpconfig {
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display_file($sftpconfig);
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}
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#***************************************************************************
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# Display contents of the ssh daemon log file
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#
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sub display_sshdlog {
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die "error: \$sshdlog uninitialized" if(not defined $sshdlog);
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display_file($sshdlog);
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}
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#***************************************************************************
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# Display contents of the ssh client log file
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#
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sub display_sshlog {
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die "error: \$sshlog uninitialized" if(not defined $sshlog);
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display_file($sshlog);
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}
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#***************************************************************************
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# Display contents of the sftp client log file
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#
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sub display_sftplog {
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die "error: \$sftplog uninitialized" if(not defined $sftplog);
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display_file($sftplog);
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}
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#***************************************************************************
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# Find a file somewhere in the given path
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#
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sub find_file {
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my $fn = $_[0];
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shift;
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my @path = @_;
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foreach (@path) {
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my $file = File::Spec->catfile($_, $fn);
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if(-e $file && ! -d $file) {
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return $file;
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}
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}
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return "";
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}
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#***************************************************************************
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# Find an executable file somewhere in the given path
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#
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sub find_exe_file {
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my $fn = $_[0];
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shift;
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my @path = @_;
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my $xext = exe_ext('SSH');
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foreach (@path) {
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my $file = File::Spec->catfile($_, $fn);
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if(-e $file && ! -d $file) {
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return $file if(-x $file);
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return $file if(($xext) && (lc($file) =~ /\Q$xext\E$/));
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}
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}
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return "";
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}
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#***************************************************************************
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# Find a file in environment path or in our sftppath
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#
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sub find_file_spath {
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my $filename = $_[0];
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my @spath;
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push(@spath, File::Spec->path());
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push(@spath, @sftppath);
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return find_file($filename, @spath);
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}
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#***************************************************************************
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# Find an executable file in environment path or in our httptlssrvpath
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#
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sub find_exe_file_hpath {
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my $filename = $_[0];
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my @hpath;
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push(@hpath, File::Spec->path());
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push(@hpath, @httptlssrvpath);
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return find_exe_file($filename, @hpath);
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}
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#***************************************************************************
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# Find ssh daemon and return canonical filename
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#
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sub find_sshd {
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return find_file_spath($sshdexe);
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}
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#***************************************************************************
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# Find ssh client and return canonical filename
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#
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sub find_ssh {
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return find_file_spath($sshexe);
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}
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#***************************************************************************
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# Find sftp-server plugin and return canonical filename
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#
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sub find_sftpsrv {
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return find_file_spath($sftpsrvexe);
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}
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#***************************************************************************
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# Find sftp client and return canonical filename
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#
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sub find_sftp {
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return find_file_spath($sftpexe);
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}
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#***************************************************************************
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# Find ssh-keygen and return canonical filename
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#
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sub find_sshkeygen {
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return find_file_spath($sshkeygenexe);
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}
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#***************************************************************************
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# Find httptlssrv (gnutls-serv) and return canonical filename
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#
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sub find_httptlssrv {
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my $p = find_exe_file_hpath($httptlssrvexe);
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if($p) {
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my @o = `"$p" -l`;
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my $found;
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for(@o) {
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if(/Key exchange: SRP/) {
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$found = 1;
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last;
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}
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}
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return $p if($found);
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}
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return "";
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}
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#***************************************************************************
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# Return version info for the given ssh client or server binaries
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#
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sub sshversioninfo {
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my $sshbin = $_[0]; # canonical filename
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my $major;
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my $minor;
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my $patch;
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my $sshid;
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my $versnum;
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my $versstr;
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my $error;
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if(!$sshbin) {
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$error = 'Error: Missing argument 1 for sshversioninfo()';
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}
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elsif(! -x $sshbin) {
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$error = "Error: cannot read or execute $sshbin";
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}
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else {
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my $cmd = ($sshbin =~ /$sshdexe$/) ? "\"$sshbin\" -?" : "\"$sshbin\" -V";
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$error = "$cmd\n";
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foreach my $tmpstr (qx($cmd 2>&1)) {
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if($tmpstr =~ /OpenSSH[_-](\d+)\.(\d+)(\.(\d+))*/i) {
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$major = $1;
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$minor = $2;
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$patch = $4?$4:0;
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$sshid = 'OpenSSH';
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$versnum = (100*$major) + (10*$minor) + $patch;
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$versstr = "$sshid $major.$minor.$patch";
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$error = undef;
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last;
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}
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if($tmpstr =~ /OpenSSH[_-]for[_-]Windows[_-](\d+)\.(\d+)(\.(\d+))*/i) {
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$major = $1;
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$minor = $2;
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$patch = $4?$4:0;
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$sshid = 'OpenSSH-Windows';
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$versnum = (100*$major) + (10*$minor) + $patch;
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$versstr = "$sshid $major.$minor.$patch";
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$error = undef;
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last;
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}
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if($tmpstr =~ /Sun[_-]SSH[_-](\d+)\.(\d+)(\.(\d+))*/i) {
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$major = $1;
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$minor = $2;
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$patch = $4?$4:0;
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$sshid = 'SunSSH';
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$versnum = (100*$major) + (10*$minor) + $patch;
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$versstr = "$sshid $major.$minor.$patch";
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$error = undef;
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last;
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}
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$error .= $tmpstr;
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}
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chomp $error if($error);
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}
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return ($sshid, $versnum, $versstr, $error);
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}
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#***************************************************************************
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# End of library
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1;
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