added sshkeys-lint as a command
This commit is contained in:
Sitaram Chamarty
parent
35953a5bd3
commit
495390926d
189
src/commands/sshkeys-lint
Executable file
189
src/commands/sshkeys-lint
Executable file
|
|
@ -0,0 +1,189 @@
|
||||||
|
#!/usr/bin/perl
|
||||||
|
use strict;
|
||||||
|
use warnings;
|
||||||
|
|
||||||
|
# complete rewrite of the sshkeys-lint program. Usage has changed, see
|
||||||
|
# usage() function or run without arguments.
|
||||||
|
|
||||||
|
use Getopt::Long;
|
||||||
|
my $admin = 0;
|
||||||
|
my $quiet = 0;
|
||||||
|
my $help = 0;
|
||||||
|
GetOptions( 'admin|a=s' => \$admin, 'quiet|q' => \$quiet, 'help|h' => \$help );
|
||||||
|
|
||||||
|
use Data::Dumper;
|
||||||
|
$Data::Dumper::Deepcopy = 1;
|
||||||
|
$|++;
|
||||||
|
|
||||||
|
my $in_gl_section = 0;
|
||||||
|
my $warnings = 0;
|
||||||
|
|
||||||
|
sub dbg {
|
||||||
|
use Data::Dumper;
|
||||||
|
for my $i (@_) {
|
||||||
|
print STDERR "DBG: " . Dumper($i);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
sub msg {
|
||||||
|
my $warning = shift;
|
||||||
|
return if $quiet and not $warning;
|
||||||
|
$warnings++ if $warning;
|
||||||
|
print "sshkeys-lint: " . ( $warning ? "WARNING: " : "" ) . $_ for @_;
|
||||||
|
}
|
||||||
|
|
||||||
|
usage() if $help;
|
||||||
|
|
||||||
|
our @pubkeyfiles = @ARGV; @ARGV = ();
|
||||||
|
my $kd = "$ENV{HOME}/.gitolite/keydir";
|
||||||
|
if ( not @pubkeyfiles ) {
|
||||||
|
chomp( @pubkeyfiles = `find $kd -type f -name "*.pub" | sort` );
|
||||||
|
}
|
||||||
|
|
||||||
|
if ( -t STDIN ) {
|
||||||
|
@ARGV = ("$ENV{HOME}/.ssh/authorized_keys");
|
||||||
|
}
|
||||||
|
|
||||||
|
# ------------------------------------------------------------------------
|
||||||
|
|
||||||
|
my @authkeys;
|
||||||
|
my %seen_fprints;
|
||||||
|
my %pkf_by_fp;
|
||||||
|
msg 0, "==== checking authkeys file:\n";
|
||||||
|
fill_authkeys(); # uses up STDIN
|
||||||
|
|
||||||
|
if ($admin) {
|
||||||
|
my $fp = fprint("$admin.pub");
|
||||||
|
my $fpu = ( $fp && $seen_fprints{$fp}{user} || 'no access' );
|
||||||
|
# dbg("fpu = $fpu, admin=$admin");
|
||||||
|
#<<<
|
||||||
|
die "\t\t*** FATAL ***\n" .
|
||||||
|
"$admin.pub maps to $fpu, not $admin.\n" .
|
||||||
|
"You will not be able to access gitolite with this key.\n" .
|
||||||
|
"Look for the 'ssh troubleshooting' link in http://sitaramc.github.com/gitolite/.\n"
|
||||||
|
if $fpu ne "user $admin";
|
||||||
|
#>>>
|
||||||
|
}
|
||||||
|
|
||||||
|
msg 0, "==== checking pubkeys:\n" if @pubkeyfiles;
|
||||||
|
for my $pkf (@pubkeyfiles) {
|
||||||
|
# get the short name for the pubkey file
|
||||||
|
( my $pkfsn = $pkf ) =~ s(^$kd/)();
|
||||||
|
|
||||||
|
my $fp = fprint($pkf);
|
||||||
|
next unless $fp;
|
||||||
|
msg 1, "$pkfsn appears to be a COPY of $pkf_by_fp{$fp}\n" if $pkf_by_fp{$fp};
|
||||||
|
$pkf_by_fp{$fp} ||= $pkf;
|
||||||
|
my $fpu = ( $seen_fprints{$fp}{user} || 'no access' );
|
||||||
|
msg 0, "$pkfsn maps to $fpu\n";
|
||||||
|
}
|
||||||
|
|
||||||
|
if ($warnings) {
|
||||||
|
print "\n$warnings warnings found\n";
|
||||||
|
}
|
||||||
|
|
||||||
|
exit $warnings;
|
||||||
|
|
||||||
|
# ------------------------------------------------------------------------
|
||||||
|
sub fill_authkeys {
|
||||||
|
while (<>) {
|
||||||
|
my $seq = $.;
|
||||||
|
next if ak_comment($_); # also sets/clears $in_gl_section global
|
||||||
|
my $fp = fprint($_);
|
||||||
|
my $user = user($_);
|
||||||
|
|
||||||
|
check( $seq, $fp, $user );
|
||||||
|
|
||||||
|
$authkeys[$seq]{fprint} = $fp;
|
||||||
|
$authkeys[$seq]{ustatus} = $user;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
sub check {
|
||||||
|
my ( $seq, $fp, $user ) = @_;
|
||||||
|
|
||||||
|
msg 1, "line $seq, $user key found *outside* gitolite section!\n"
|
||||||
|
if $user =~ /^user / and not $in_gl_section;
|
||||||
|
|
||||||
|
msg 1, "line $seq, $user key found *inside* gitolite section!\n"
|
||||||
|
if $user !~ /^user / and $in_gl_section;
|
||||||
|
|
||||||
|
if ( $seen_fprints{$fp} ) {
|
||||||
|
#<<<
|
||||||
|
msg 1, "authkeys line $seq ($user) will be ignored by sshd; " .
|
||||||
|
"same key found on line " .
|
||||||
|
$seen_fprints{$fp}{seq} . " (" .
|
||||||
|
$seen_fprints{$fp}{user} . ")\n";
|
||||||
|
return;
|
||||||
|
#>>>
|
||||||
|
}
|
||||||
|
|
||||||
|
$seen_fprints{$fp}{seq} = $seq;
|
||||||
|
$seen_fprints{$fp}{user} = $user;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub user {
|
||||||
|
my $user = '';
|
||||||
|
$user ||= "user $1" if /^command=.*gitolite-shell (.*?)"/;
|
||||||
|
$user ||= "unknown command" if /^command/;
|
||||||
|
$user ||= "shell access" if /^ssh-(rsa|dss)/;
|
||||||
|
|
||||||
|
return $user;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub ak_comment {
|
||||||
|
local $_ = shift;
|
||||||
|
$in_gl_section = 1 if /^# gitolite start/;
|
||||||
|
$in_gl_section = 0 if /^# gitolite end/;
|
||||||
|
die "gitosis? what's that?\n" if /^#.*gitosis/;
|
||||||
|
return /^\s*(#|$)/;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub fprint {
|
||||||
|
local $_ = shift;
|
||||||
|
my ( $fh, $tempfn, $in );
|
||||||
|
if (/ssh-(dss|rsa) /) {
|
||||||
|
# an actual key was passed. Since ssh-keygen requires an actual file,
|
||||||
|
# make a temp file to take the data and pass on to ssh-keygen
|
||||||
|
s/^.* (ssh-dss|ssh-rsa)/$1/;
|
||||||
|
use File::Temp qw(tempfile);
|
||||||
|
( $fh, $tempfn ) = tempfile();
|
||||||
|
$in = $tempfn;
|
||||||
|
print $fh $_;
|
||||||
|
close $fh;
|
||||||
|
} else {
|
||||||
|
# a filename was passed
|
||||||
|
$in = $_;
|
||||||
|
}
|
||||||
|
# dbg("in = $in");
|
||||||
|
-f $in or die "file not found: $in\n";
|
||||||
|
open( $fh, "ssh-keygen -l -f $in |" ) or die "could not fork: $!\n";
|
||||||
|
my $fp = <$fh>;
|
||||||
|
# dbg("fp = $fp");
|
||||||
|
close $fh;
|
||||||
|
unlink $tempfn if $tempfn;
|
||||||
|
warn "$fp\n" unless $fp =~ /([0-9a-f][0-9a-f](:[0-9a-f][0-9a-f])+)/;
|
||||||
|
return $1;
|
||||||
|
}
|
||||||
|
|
||||||
|
# ------------------------------------------------------------------------
|
||||||
|
sub usage {
|
||||||
|
print <<EOF;
|
||||||
|
|
||||||
|
sshkeys-lint expects
|
||||||
|
- the contents of an authorized_keys file via STDIN
|
||||||
|
- one or more pubkey filenames as arguments
|
||||||
|
|
||||||
|
sample use to check all keys on gitolite server:
|
||||||
|
cd ~/.gitolite/keydir
|
||||||
|
cat ~/.ssh/authorized_keys | sshkeys-lint `find . -name "*.pub"`
|
||||||
|
# or supply only one pubkey file to check only that:
|
||||||
|
cat ~/.ssh/authorized_keys | sshkeys-lint YourName.pub
|
||||||
|
|
||||||
|
Note that it runs ssh-keygen -l for each line in the authkeys file and each
|
||||||
|
pubkey in the argument list, so be wary of running it on something huge. This
|
||||||
|
is meant for troubleshooting.
|
||||||
|
|
||||||
|
EOF
|
||||||
|
exit 1;
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue