64 lines
2.0 KiB
Perl
Executable File
64 lines
2.0 KiB
Perl
Executable File
#!/usr/bin/perl
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# This ADC requires unrestricted arguments, so you need to
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# install it into $GL_ADC_PATH/ua/git-annex-shell, instead of
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# directly into $GL_ADC_PATH/
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#
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# This requires git-annex version 20111016 or newer. Older versions won't
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# be secure.
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use strict;
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use warnings;
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# pull in modules we need
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BEGIN {
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die "ENV GL_RC not set\n" unless $ENV{GL_RC};
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die "ENV GL_BINDIR not set\n" unless $ENV{GL_BINDIR};
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unshift @INC, $ENV{GL_BINDIR};
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}
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use gitolite_rc;
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use gitolite;
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# ignore @ARGV and look at the original unmodified command
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my $cmd=$ENV{SSH_ORIGINAL_COMMAND};
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# Expect commands like:
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# git-annex-shell 'configlist' '/~/repo'
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# git-annex-shell 'sendkey' '/~/repo' 'key'
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# The parameters are always single quoted, and the repo path is always
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# the second parameter.
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# Further parameters are not validated here (see below).
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die "bad git-annex-shell command: $cmd"
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unless $cmd =~ m#^(git-annex-shell '\w+' ')/\~/([0-9a-zA-Z][0-9a-zA-Z._\@/+-]*)('( .*|))$#;
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my $start = $1;
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my $repo = $2;
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my $end = $3;
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die "I dont like some of the characters in $repo\n" unless $repo =~ $REPONAME_PATT;
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die "I dont like absolute paths in $cmd\n" if $repo =~ /^\//;
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die "I dont like '..' paths in $cmd\n" if $repo =~ /\.\./;
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# Modify $cmd, fixing up the path to the repo to include REPO_BASE.
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my $newcmd="$start$REPO_BASE/$repo$end";
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# Rather than keeping track of which git-annex-shell commands
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# require write access and which are readonly, we tell it
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# when readonly access is needed.
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my ($perm, $creator) = check_access($repo);
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if ($perm =~ /W/) {
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}
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elsif ($perm =~ /R/) {
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$ENV{GIT_ANNEX_SHELL_READONLY}=1;
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}
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else {
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die "$perm $repo $ENV{GL_USER} DENIED\n";
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}
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# Further limit git-annex-shell to safe commands (avoid it passing
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# unknown commands on to git-shell)
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$ENV{GIT_ANNEX_SHELL_LIMITED}=1;
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# Note that $newcmd does *not* get evaluated by the unix shell.
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# Instead it is passed as a single parameter to git-annex-shell for
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# it to parse and handle the command. This is why we do not need to
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# fully validate $cmd above.
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log_it();
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exec "git-annex-shell", "-c", $newcmd;
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