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shell? perl? schizophrenia? fix it NOW dammit :)

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Sitaram Chamarty 2009-08-23 11:05:14 +05:30
parent 901a5f7220
commit 40dbada486
2 changed files with 86 additions and 71 deletions
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71
gl-add-auth-keys
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@ -1,71 +0,0 @@
#!/bin/bash
# === add-auth-keys ===
# refreshes ~/.ssh/authorized_keys from the list of pub-keys
# part of the gitosis-lite (GL) suite
# how run: manual, by GL admin
# when: anytime a pubkey is added/deleted
# (i.e., contents of ~/.gitosis-lite/pubkeys change)
# input: ~/.gitosis-lite/pubkeys
# output: ~/.ssh/authorized_keys
# security:
# - touches a very critical system file that manages the restrictions on
# incoming users. Be sure to audit AUTH_COMMAND and AUTH_OPTIONS (see
# below) on any change to this script
# - no security checks within program. The GL admin runs this manually
# robustness:
# - if the "start" line exists, but the "end" line does not, you lose the
# rest of the existing authkey file. In general, "don't do that (TM)",
# but we do have a "vim -d" popping up so you can see the changes being
# made, just in case...
# other notes:
# - you do NOT need to run this for permission changes within
# gitosis-lite.conf, (like giving an *existing* user new rights)
# - keys are added/deleted from the keystore **manually**, and all keys
# are named "name.pub"
# command and options for authorized_keys
AUTH_COMMAND=~/.gitosis-lite/myecho
AUTH_OPTIONS="no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty"
# save existing authkeys minus the GL-added stuff
sed -e '/^# gitosis-lite start/,/^# gitosis-lite end/d' \
< ~/.ssh/authorized_keys \
> ~/.ssh/new_authkeys
# add our "start" line, each key on its own line (prefixed by command and
# options, in the standard ssh authorized_keys format), then the "end" line.
echo "# gitosis-lite start" >> ~/.ssh/new_authkeys
cd ~/.gitosis-lite/pubkeys
for i in *.pub
do
j=${i%.pub}
echo -n "command=\"$AUTH_COMMAND $j\",$AUTH_OPTIONS "
cat $i
done >> ~/.ssh/new_authkeys
echo "# gitosis-lite end" >> ~/.ssh/new_authkeys
# just so you can see what changes are being made
vim -d ~/.ssh/authorized_keys ~/.ssh/new_authkeys
# all done; overwrite the file (use cat to avoid perm changes)
cat ~/.ssh/new_authkeys > ~/.ssh/authorized_keys
rm ~/.ssh/new_authkeys
# if the gl admin directory (~/.gitosis-lite) is itself a git repo, do an
# autocheckin. nothing fancy; this is a "just in case" type of thing.
cd ~/.gitosis-lite
if [[ -d .git ]]
then
git add -A pubkeys # stage all changes in pubkeys
if ! git diff --cached --quiet # and if there are any
then
echo pubkeys changed # create a commit message
echo
git diff --cached --name-status
fi | git commit -F - # and commit
fi

86
gl-compile-conf Executable file
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#!/usr/bin/perl -w
use strict;
# === add-auth-keys ===
# refreshes ~/.ssh/authorized_keys from the list of pub-keys
# part of the gitosis-lite (GL) suite
# how run: manual, by GL admin
# when: anytime a pubkey is added/deleted
# (i.e., contents of ~/.gitosis-lite/keydir change)
# input: ~/.gitosis-lite/keydir
# output: ~/.ssh/authorized_keys
# security:
# - touches a very critical system file that manages the restrictions on
# incoming users. Be sure to audit AUTH_COMMAND and AUTH_OPTIONS (see
# below) on any change to this script
# - no security checks within program. The GL admin runs this manually
# robustness:
# - if the "start" line exists, but the "end" line does not, you lose the
# rest of the existing authkey file. In general, "don't do that (TM)",
# but we do have a "vim -d" popping up so you can see the changes being
# made, just in case...
# other notes:
# - you do NOT need to run this for permission changes within
# gitosis-lite.conf, (like giving an *existing* user new rights)
# - keys are added/deleted from the keystore **manually**, and all keys
# are named "name.pub"
# command and options for authorized_keys
our $AUTH_COMMAND=$ENV{HOME} . "/.gitosis-lite/gl-auth-command";
our $AUTH_OPTIONS="no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty";
# quick subroutines
sub my_chdir
{
chdir($_[0]) or die "chdir $_[0] failed: $!";
}
open(INF, "<", $ENV{HOME} . "/.ssh/authorized_keys") or die "open old authkeys failed: $!";
open(OUT, ">", $ENV{HOME} . "/.ssh/new_authkeys") or die "open new authkeys failed: $!";
# save existing authkeys minus the GL-added stuff
while (<INF>)
{
print OUT unless (/^# gitosis-lite start/../^# gitosis-lite end/);
}
# add our "start" line, each key on its own line (prefixed by command and
# options, in the standard ssh authorized_keys format), then the "end" line.
print OUT "# gitosis-lite start\n";
my_chdir($ENV{HOME} . "/.gitosis-lite/keydir");
for my $pubkey (glob("*.pub"))
{
my $user = $pubkey; $user =~ s/\.pub$//;
print OUT "command=\"$AUTH_COMMAND $user\",$AUTH_OPTIONS ";
print OUT `cat $pubkey`;
}
print OUT "# gitosis-lite end\n";
close(OUT);
# check what changes are being made; just a comfort factor
system("vim -d ~/.ssh/authorized_keys ~/.ssh/new_authkeys");
# all done; overwrite the file (use cat to avoid perm changes)
system("cat ~/.ssh/new_authkeys > ~/.ssh/authorized_keys");
system("rm ~/.ssh/new_authkeys");
# if the gl admin directory (~/.gitosis-lite) is itself a git repo, do an
# autocheckin. nothing fancy; this is a "just in case" type of thing.
my_chdir($ENV{HOME} . "/.gitosis-lite");
if (-d ".git")
{
system("git add -A keydir"); # stage all changes in keydir
if (! system("git diff --cached --quiet") )
# and if there are any
{
open(COMMIT, "|-", "git commit -F -")
or die "pipe commit failed: $!";
print COMMIT "keydir changed\n\n";
print COMMIT `git diff --cached --name-status`;
close(COMMIT) or die "close commit failed: $!";
}
}