You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
132 lines
4.8 KiB
132 lines
4.8 KiB
Author: Daniel F. Dickinson <cshored@thecshore.com>
|
|
Date: Sun Jan 27 01:04:25 2019 -0500
|
|
|
|
gitolite: Eliminate the need for ssh-keygen dependency
|
|
|
|
Previously gitolite used ssh-keygen to generate fingerprints
|
|
from OpenSSH keys to ensure non-duplication of keys when
|
|
processing them to create / manage user ssh access to the
|
|
git repositories. This ends up depending on openssl,
|
|
which is large and unnecessary when we are running on an
|
|
embedded distro such as OpenWrt.
|
|
|
|
Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>
|
|
Index: gitolite-3.6.11/src/lib/Gitolite/Common.pm
|
|
===================================================================
|
|
--- gitolite-3.6.11.orig/src/lib/Gitolite/Common.pm
|
|
+++ gitolite-3.6.11/src/lib/Gitolite/Common.pm
|
|
@@ -26,6 +26,8 @@ package Gitolite::Common;
|
|
use Exporter 'import';
|
|
use File::Path qw(mkpath);
|
|
use File::Temp qw(tempfile);
|
|
+use MIME::Base64 qw(decode_base64);
|
|
+use Digest::SHA qw(sha256_base64);
|
|
use Carp qw(carp cluck croak confess);
|
|
|
|
use strict;
|
|
@@ -352,43 +352,82 @@ sub logger_plus_stderr {
|
|
}
|
|
|
|
# ----------------------------------------------------------------------
|
|
+# Decode OpenSSH key
|
|
+# If the key cannot be parsed it will be undef
|
|
+# Returns (algorithm_name, algo_data1, algo_data2, ...)
|
|
+sub ssh_decode_key($) {
|
|
+ my $key = shift;
|
|
+ my $keydata = decode_base64($key);
|
|
+ my @keyparts = ();
|
|
+ my $partlen;
|
|
+ my $algorithm;
|
|
+ my $data;
|
|
+ my $pos = 0;
|
|
+ $partlen = unpack('N', substr $keydata, $pos, 4) or return undef;
|
|
+ $algorithm = substr $keydata, $pos + 4, $partlen or return undef;
|
|
+ $pos = $pos + 4 + $partlen;
|
|
+ while ( $pos <= length($keydata) ) {
|
|
+ $partlen = unpack('N', substr $keydata, $pos, 4) or last;
|
|
+ $data = unpack('s>*', substr $keydata, $pos + 4, 4) or last;
|
|
+ $pos = $pos + 4 + $partlen;
|
|
+ push @keyparts, $data;
|
|
+ }
|
|
+ return ( $algorithm, @keyparts );
|
|
+}
|
|
+
|
|
+# ----------------------------------------------------------------------
|
|
+# Parse OpenSSH line
|
|
+# If the file cannot be parsed it will be undef
|
|
+# Returns (restrictions, algorithm, PEMkey, comment)
|
|
+sub ssh_parse_line($) {
|
|
+ my $ssh_line = shift;
|
|
+ my @ssh_parts = split / /, $ssh_line, 5;
|
|
+ if (scalar @ssh_parts < 4) {
|
|
+ @ssh_parts = ('', @ssh_parts);
|
|
+ }
|
|
+ if (scalar @ssh_parts > 4) {
|
|
+ @ssh_parts = @ssh_parts[0,3]
|
|
+ }
|
|
+ if (scalar @ssh_parts < 4) {
|
|
+ @ssh_parts = undef;
|
|
+ }
|
|
+ return ( @ssh_parts );
|
|
+}
|
|
+
|
|
+# ----------------------------------------------------------------------
|
|
+# Get the SSH fingerprint of a line of text
|
|
+# If the fingerprint cannot be parsed, it will be undef
|
|
+# In a scalar context, returns the fingerprint
|
|
+# In a list context, returns (fingerprint, output) where output
|
|
+# is the parsed input line (less algorithm)
|
|
+sub ssh_fingerprint_line($) {
|
|
+ my $ssh_line = shift;
|
|
+ my @parsed_line = ssh_parse_line($ssh_line) or return undef;
|
|
+ my @ssh_parts = ssh_decode_key($parsed_line[2]) or return undef;
|
|
+ ( $parsed_line[1] eq $ssh_parts[0] ) or die "algorithm mismatch: $parsed_line[1] vs. $ssh_parts[0]";
|
|
+ my $fp = sha256_base64(join(' ', @ssh_parts[1,-1]));
|
|
+ return wantarray ? ($fp, join(' ', @ssh_parts[1,-1])) : $fp;
|
|
+}
|
|
+
|
|
+# ----------------------------------------------------------------------
|
|
# Get the SSH fingerprint of a file
|
|
# If the fingerprint cannot be parsed, it will be undef
|
|
# In a scalar context, returns the fingerprint
|
|
# In a list context, returns (fingerprint, output) where output
|
|
-# is the raw output of the ssh-keygen command
|
|
-sub ssh_fingerprint_file {
|
|
+# is the raw input line
|
|
+sub ssh_fingerprint_file($) {
|
|
my $in = shift;
|
|
-f $in or die "file not found: $in\n";
|
|
my $fh;
|
|
- open( $fh, "ssh-keygen -l -f $in |" ) or die "could not fork: $!\n";
|
|
+ open( $fh, $in ) or die "could not open $in: $!\n";
|
|
my $output = <$fh>;
|
|
chomp $output;
|
|
- # dbg("fp = $fp");
|
|
close $fh;
|
|
# Return a valid fingerprint or undef
|
|
- my $fp = undef;
|
|
- if($output =~ /((?:MD5:)?(?:[0-9a-f]{2}:){15}[0-9a-f]{2})/i or
|
|
- $output =~ m{((?:RIPEMD|SHA)\d+:[A-Za-z0-9+/=]+)}i) {
|
|
- $fp = $1;
|
|
- }
|
|
+ my $fp = ssh_fingerprint_line($output);
|
|
return wantarray ? ($fp, $output) : $fp;
|
|
}
|
|
|
|
-# Get the SSH fingerprint of a line of text
|
|
-# If the fingerprint cannot be parsed, it will be undef
|
|
-# In a scalar context, returns the fingerprint
|
|
-# In a list context, returns (fingerprint, output) where output
|
|
-# is the raw output of the ssh-keygen command
|
|
-sub ssh_fingerprint_line {
|
|
- my ( $fh, $fn ) = tempfile();
|
|
- print $fh shift() . "\n";
|
|
- close $fh;
|
|
- my ($fp,$output) = ssh_fingerprint_file($fn);
|
|
- unlink $fn;
|
|
- return wantarray ? ($fp,$output) : $fp;
|
|
-}
|
|
-
|
|
# ----------------------------------------------------------------------
|
|
|
|
# bare-minimum subset of 'Tsh' (see github.com/sitaramc/tsh)
|