cgi/Git/RepoCGI.pm

   1 package Git::RepoCGI;
   2
   3 use strict;
   4 use warnings;
   5
   6
   7 ### Administrativa
   8
   9 BEGIN {
  10         our $VERSION = '0.1';
  11         our @ISA = qw(Exporter);
  12         our @EXPORT = qw(scrypt html_esc jailed_file
  13                          filedb_atomic_append filedb_atomic_edit
  14                          valid_name valid_email valid_repo_url valid_web_url);
  15
  16         use CGI qw(:standard :escapeHTML -nosticky);
  17         use CGI::Util qw(unescape);
  18         use CGI::Carp qw(fatalsToBrowser);
  19 }
  20
  21
  22 ### RepoCGI object
  23
  24 sub new {
  25         my $class = shift;
  26         my ($heading) = @_;
  27         my $repo = {};
  28
  29         $repo->{cgi} = CGI->new;
  30
  31         print $repo->{cgi}->header(-type=>'text/html', -charset => 'utf-8');
  32
  33         print <<EOT;
  34 <?xml version="1.0" encoding="utf-8"?>
  35 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
  36 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
  37
  38 <head>
  39 <title>repo.or.cz :: $heading</title>
  40 <link rel="stylesheet" type="text/css" href="/gitweb.css"/>
  41 <link rel="shortcut icon" href="/git-favicon.png" type="image/png"/>
  42 </head>
  43
  44 <body>
  45
  46 <div class="page_header">
  47 <a href="http://git.or.cz/" title="Git homepage"><img src="/git-logo.png" width="72" height="27" alt="git" style="float:right; border-width:0px;"/></a>
  48 <a href="/">repo.or.cz</a>
  49 <div class="search">
  50 Administration Interface
  51 </div>
  52 </div>
  53
  54 <h1>$heading</h1>
  55 EOT
  56
  57         bless $repo, $class;
  58 }
  59
  60 sub DESTROY {
  61         my $self = shift;
  62         my $cgi = $self->cgi;
  63         my $cginame = $cgi->url(-absolute => 1);
  64         $cginame =~ s#^/m/##;
  65         if ($cginame =~ /^[a-zA-Z0-9_.\/-]+\.cgi$/) {
  66                 print <<EOT;
  67 <div align="right">
  68 <a href="http://repo.or.cz/gitweb.cgi/repo.git?a=blob;f=cgi/$cginame">(view source)</a>
  69 </div>
  70 EOT
  71         }
  72         print <<EOT;
  73 </body>
  74 </html>
  75 EOT
  76 }
  77
  78 sub cgi {
  79         my $self = shift;
  80         $self->{cgi};
  81 }
  82
  83 sub err {
  84         my $self = shift;
  85         print "<p style=\"text-color: red\">@_</p>\n";
  86         $self->{err}++;
  87 }
  88
  89 sub err_check {
  90         my $self = shift;
  91         my $err = $self->{err};
  92         $err and print "<p>Operation aborted due to $err errors.</p>\n";
  93         $err;
  94 }
  95
  96 sub wparam {
  97         my $self = shift;
  98         my ($param) = @_;
  99         my $val = $self->{cgi}->param($param);
 100         $val =~ s/^\s*(.*?)\s*$/$1/;
 101         $val;
 102 }
 103
 104
 105 ### Random utility functions
 106
 107 sub scrypt {
 108         my ($pwd) = @_;
 109         crypt($pwd, join ('', ('.', '/', 2..9, 'A'..'Z', 'a'..'z')[rand 64, rand 64]));
 110 }
 111
 112 sub html_esc {
 113         my ($str) = @_;
 114         $str =~ s/&/&amp;/g;
 115         $str =~ s/</&lt;/g; $str =~ s/>/&gt;/g;
 116         $str =~ s/"/&quot;/g;
 117         $str;
 118 }
 119
 120 sub jailed_file {
 121         my ($filename) = @_;
 122         "/home/repo/j/$filename";
 123 }
 124
 125 sub lock_file {
 126         my ($path) = @_;
 127
 128         $path .= '.lock';
 129
 130         use Errno qw(EEXIST);
 131         use Fcntl qw(O_WRONLY O_CREAT O_EXCL);
 132         use IO::Handle;
 133         my $handle = new IO::Handle;
 134
 135         unless (sysopen($handle, $path, O_WRONLY|O_CREAT|O_EXCL)) {
 136                 my $cnt = 0;
 137                 while (not sysopen($handle, $path, O_WRONLY|O_CREAT|O_EXCL)) {
 138                         ($! == EEXIST) or die "$path open failed: $!";
 139                         ($cnt++ < 16) or die "$path open failed: cannot open lockfile";
 140                         sleep(1);
 141                 }
 142         }
 143         # XXX: filedb-specific
 144         chmod 0664, $path or die "$path g+w failed: $!";
 145
 146         $handle;
 147 }
 148
 149 sub unlock_file {
 150         my ($path) = @_;
 151
 152         rename "$path.lock", $path or die "$path unlock failed: $!";
 153 }
 154
 155 sub filedb_atomic_append {
 156         my ($file, $line) = @_;
 157         my $id = 65536;
 158
 159         open my $src, $file or die "$file open for reading failed: $!";
 160         my $dst = lock_file($file);
 161
 162         while (<$src>) {
 163                 my $aid = (split /:/)[2];
 164                 $id = $aid + 1 if ($aid >= $id);
 165
 166                 print $dst $_ or die "$file(l) write failed: $!";
 167         }
 168
 169         $line =~ s/\\i/$id/g;
 170         print $dst "$line\n" or die "$file(l) write failed: $!";
 171
 172         close $dst or die "$file(l) close failed: $!";
 173         close $src;
 174
 175         unlock_file($file);
 176
 177         $id;
 178 }
 179
 180 sub filedb_atomic_edit {
 181         my ($file, $fn) = @_;
 182
 183         open my $src, $file or die "$file open for reading failed: $!";
 184         my $dst = lock_file($file);
 185
 186         while (<$src>) {
 187                 print $dst $fn->($_) or die "$file(l) write failed: $!";
 188         }
 189
 190         close $dst or die "$file(l) close failed: $!";
 191         close $src;
 192
 193         unlock_file($file);
 194 }
 195
 196 # BOTH user AND project name!
 197 sub valid_name {
 198         $_ = $_[0];
 199         /^[a-zA-Z0-9_+-]+$/;
 200 }
 201 sub valid_email {
 202         $_ = $_[0];
 203         /^[a-zA-Z0-9+._-]+@[a-zA-Z0-9-.]+$/;
 204 }
 205 sub valid_web_url {
 206         $_ = $_[0];
 207         /^http:\/\/[a-zA-Z0-9-.]+(\/[_\%a-zA-Z0-9.\/~-]*)?(#[a-zA-Z0-9._-]+)?$/;
 208 }
 209 sub valid_repo_url {
 210         $_ = $_[0];
 211         /^http:\/\/[a-zA-Z0-9-.]+(\/[_\%a-zA-Z0-9.\/~-]*)?$/ or
 212          /^git:\/\/[a-zA-Z0-9-.]+(\/[_\%a-zA-Z0-9.\/~-]*)?$/;
 213 }
 214
 215
 216 ### Project object
 217
 218 package Git::RepoCGI::Project;
 219
 220 BEGIN { use Git::RepoCGI; }
 221
 222 our %propmap = (
 223         url => 'base_url',
 224         email => 'owner',
 225         desc => 'description',
 226         README => 'README',
 227         hp => 'homepage',
 228 );
 229
 230 sub _property_path {
 231         my $self = shift;
 232         my ($name) = @_;
 233         $self->{path}.'/'.$name;
 234 }
 235
 236 sub _property_fget {
 237         my $self = shift;
 238         my ($name) = @_;
 239         my $value;
 240         $propmap{$name} or die "unknown property: $name";
 241         open P, $self->_property_path($propmap{$name}) or return undef;
 242         chomp($value = <P>);
 243         close P;
 244         $value;
 245 }
 246
 247 sub _property_fput {
 248         my $self = shift;
 249         my ($name, $value) = @_;
 250         $propmap{$name} or die "unknown property: $name";
 251         open P, '>'.$self->_property_path($propmap{$name}) or die "$name put failed: $!";
 252         $value ne '' and print P "$value\n";
 253         close P;
 254         chmod 0664, $self->_property_path($propmap{$name}) or die "$name chmod failed: $!";
 255 }
 256
 257 sub _properties_load {
 258         my $self = shift;
 259         foreach my $prop (keys %propmap) {
 260                 $self->{$prop} = $self->_property_fget($prop);
 261         }
 262 }
 263
 264 sub _properties_save {
 265         my $self = shift;
 266         foreach my $prop (keys %propmap) {
 267                 $self->_property_fput($prop, $self->{$prop});
 268         }
 269 }
 270
 271 sub _nofetch_path {
 272         my $self = shift;
 273         $self->_property_path('.nofetch');
 274 }
 275
 276 sub _nofetch {
 277         my $self = shift;
 278         my ($nofetch) = @_;
 279         my $np = $self->_nofetch_path;
 280         if ($nofetch) {
 281                 open X, '>'.$np or die "nofetch failed: $!";
 282                 close X;
 283         } else {
 284                 unlink $np or die "yesfetch failed: $!";
 285         }
 286 }
 287
 288 sub _group_add {
 289         my $self = shift;
 290         my ($xtra) = @_;
 291         $xtra .= join(',', @{$self->{users}});
 292         filedb_atomic_append(jailed_file('/etc/group'),
 293                 join(':', $self->{name}, $self->{crypt}, '\i', $xtra));
 294 }
 295
 296 sub _group_update {
 297         my $self = shift;
 298         my $xtra = join(',', @{$self->{users}});
 299         filedb_atomic_edit(jailed_file('/etc/group'),
 300                 sub {
 301                         $_ = $_[0];
 302                         chomp;
 303                         if ($self->{name} eq (split /:/)[0]) {
 304                                 # preserve readonly flag
 305                                 s/::([^:]*)$/:$1/ and $xtra = ":$xtra";
 306                                 return join(':', $self->{name}, $self->{crypt}, $self->{gid}, $xtra)."\n";
 307                         } else {
 308                                 return "$_\n";
 309                         }
 310                 }
 311         );
 312 }
 313
 314 sub _group_remove {
 315         my $self = shift;
 316         filedb_atomic_edit(jailed_file('/etc/group'),
 317                 sub {
 318                         $self->{name} ne (split /:/)[0]) and return $_;
 319                 }
 320         );
 321 }
 322
 323 sub _hook_path {
 324         my $self = shift;
 325         my ($name) = @_;
 326         $self->{path}.'/hooks/'.$name;
 327 }
 328
 329 sub _hook_install {
 330         my $self = shift;
 331         my ($name) = @_;
 332         open SRC, "/home/repo/repomgr/$name-hook" or die "cannot open hook $name: $!";
 333         open DST, '>'.$self->_hook_path($name) or die "cannot open hook $name for writing: $!";
 334         while (<SRC>) { print DST $_; }
 335         close DST;
 336         close SRC;
 337         chmod 0775, $self->_hook_path($name) or die "cannot chmod hook $name: $!";
 338 }
 339
 340 sub _hooks_install {
 341         my $self = shift;
 342         foreach my $hook ('update') {
 343                 $self->_hook_install($hook);
 344         }
 345 }
 346
 347 # private constructor, do not use
 348 sub _new {
 349         my $class = shift;
 350         my ($name, $path) = @_;
 351         valid_name($name) or die "refusing to create project with invalid name ($name)!";
 352         my $proj = { name => $name, path => $path };
 353
 354         bless $proj, $class;
 355 }
 356
 357 # public constructor #0
 358 # creates a virtual project not connected to disk image
 359 # you can conjure() it later to disk
 360 sub ghost {
 361         my $class = shift;
 362         my ($name, $mirror) = @_;
 363         my $self = $class->_new($name, $mirror ? "/home/repo/repodata/to-clone/$name" : "/srv/git/$name.git");
 364         $self->{users} = [];
 365         $self->{mirror} = $mirror;
 366         $self;
 367 }
 368
 369 # public constructor #1
 370 sub load {
 371         my $class = shift;
 372         my ($name, $warehouse) = @_;
 373         $warehouse ||= '/srv/git';
 374
 375         open F, jailed_file("/etc/group") or die "project load failed: $!";
 376         while (<F>) {
 377                 chomp;
 378                 @_ = split /:+/;
 379                 next unless (shift eq $name);
 380
 381                 my $self = $class->_new($name, "$warehouse/$name".($warehouse eq '/srv/git' ? '.git' : ''));
 382                 (-d $self->{path}) or die "invalid path (".$self->{path}.") for project ".$self->{name};
 383
 384                 my $ulist;
 385                 ($self->{crypt}, $self->{gid}, $ulist) = @_;
 386                 $ulist ||= '';
 387                 $self->{users} = [split /,/, $ulist];
 388                 $self->{mirror} = ! -e $self->_nofetch_path;
 389
 390                 $self->_properties_load;
 391                 return $self;
 392         }
 393         close F;
 394         undef;
 395 }
 396
 397 # $proj may not be in sane state if this returns false!
 398 sub cgi_fill {
 399         my $self = shift;
 400         my ($repo) = @_;
 401         my $cgi = $repo->cgi;
 402
 403         my $pwd = $cgi->param('pwd');
 404         if ($pwd ne '' or not $self->{crypt}) {
 405                 $self->{crypt} = scrypt($pwd);
 406         }
 407
 408         $self->{email} = $repo->wparam('email');
 409         valid_email($self->{email})
 410                 or $repo->err("Your email sure looks weird...?");
 411
 412         $self->{url} = $repo->wparam('url');
 413         if ($self->{url}) {
 414                 valid_repo_url($self->{url})
 415                         or $repo->err("Invalid URL. Note that only HTTP and Git protocol is supported. If the URL contains funny characters, contact me.");
 416         }
 417
 418         $self->{desc} = $repo->wparam('desc');
 419         length($self->{desc}) <= 1024
 420                 or $repo->err("<b>Short</b> description length > 1kb!");
 421
 422         $self->{README} = $repo->wparam('README');
 423         length($self->{README}) <= 8192
 424                 or $repo->err("README length > 8kb!");
 425
 426         $self->{hp} = $repo->wparam('hp');
 427         if ($self->{hp}) {
 428                 valid_web_url($self->{hp})
 429                         or $repo->err("Invalid homepage URL. Note that only HTTP protocol is supported. If the URL contains funny characters, contact me.");
 430         }
 431
 432         # FIXME: Permit only existing users
 433         $self->{users} = [grep { valid_name($_) } $cgi->param('user')];
 434
 435         not $repo->err_check;
 436 }
 437
 438 sub form_defaults {
 439         my $self = shift;
 440         (
 441                 name => $self->{name},
 442                 email => $self->{email},
 443                 url => $self->{url},
 444                 desc => html_esc($self->{desc}),
 445                 README => html_esc($self->{README}),
 446                 hp => $self->{hp},
 447                 users => $self->{users},
 448         );
 449 }
 450
 451 sub premirror {
 452         my $self = shift;
 453
 454         mkdir $self->{path} or die "mkdir failed: $!";
 455         chmod 0775, $self->{path} or die "chmod failed: $!";
 456         $self->_properties_save;
 457         $self->_group_add(':');
 458 }
 459
 460 sub conjure {
 461         my $self = shift;
 462
 463         system('cg-admin-setuprepo', '-g', 'repo', $self->{path}) == 0
 464                 or die "cg-admin-setuprepo failed: $?";
 465         $self->_nofetch(1);
 466         $self->_properties_save;
 467         $self->_group_add;
 468         $self->_hooks_install;
 469 }
 470
 471 sub update {
 472         my $self = shift;
 473
 474         $self->_properties_save;
 475         $self->_group_update;
 476 }
 477
 478 sub delete {
 479         my $self = shift;
 480
 481         system('rm', '-r', $self->{path});
 482         $self->_group_remove;
 483 }
 484
 485 # static method
 486 sub does_exist {
 487         my ($name) = @_;
 488         valid_name($name) or die "tried to query for project with invalid name $name!";
 489         (available($name)
 490                 or -d "/home/repo/repodata/cloning/$name"
 491                 or -d "/home/repo/repodata/to-clone/$name");
 492 }
 493 sub available {
 494         my ($name) = @_;
 495         valid_name($name) or die "tried to query for project with invalid name $name!";
 496         (-d "/srv/git/$name.git");
 497 }
 498
 499
 500 ### User object
 501
 502 package Git::RepoCGI::User;
 503
 504 BEGIN { use Git::RepoCGI; }
 505
 506 sub _passwd_add {
 507         my $self = shift;
 508         filedb_atomic_append(jailed_file('/etc/passwd'),
 509                 join(':', $self->{name}, 'x', '\i', 65536, $self->{email}, '/', '/bin/git-shell'));
 510 }
 511
 512 sub _sshkey_path {
 513         my $self = shift;
 514         '/etc/sshkeys/'.$self->{name};
 515 }
 516
 517 sub _sshkey_save {
 518         my $self = shift;
 519         open F, ">".jailed_file($self->_sshkey_path) or die "sshkey failed: $!";
 520         print F $self->{keys}."\n";
 521         close F;
 522         chmod 0664, jailed_file($self->_sshkey_path);
 523 }
 524
 525 # private constructor, do not use
 526 sub _new {
 527         my $class = shift;
 528         my ($name) = @_;
 529         valid_name($name) or die "refusing to create user with invalid name ($name)!";
 530         my $proj = { name => $name };
 531
 532         bless $proj, $class;
 533 }
 534
 535 # public constructor #0
 536 # creates a virtual user not connected to disk record
 537 # you can conjure() it later to disk
 538 sub ghost {
 539         my $class = shift;
 540         my ($name) = @_;
 541         my $self = $class->_new($name);
 542         $self;
 543 }
 544
 545 # $user may not be in sane state if this returns false!
 546 sub cgi_fill {
 547         my $self = shift;
 548         my ($repo) = @_;
 549         my $cgi = $repo->cgi;
 550
 551         $self->{name} = $repo->wparam('name');
 552         valid_name($self->{name})
 553                 or $repo->err("Name contains invalid characters.");
 554
 555         $self->{email} = $repo->wparam('email');
 556         valid_email($self->{email})
 557                 or $repo->err("Your email sure looks weird...?");
 558
 559         $self->{keys} = $cgi->param('keys');
 560         length($self->{keys}) <= 4096
 561                 or $repo->err("The list of keys is more than 4kb. Do you really need that much?");
 562
 563         not $repo->err_check;
 564 }
 565
 566 sub conjure {
 567         my $self = shift;
 568
 569         $self->_passwd_add;
 570         $self->_sshkey_save;
 571 }
 572
 573 # static method
 574 sub does_exist {
 575         my ($name) = @_;
 576         valid_name($name) or die "tried to query for user with invalid name $name!";
 577         (-e jailed_file("/etc/sshkeys/$name"));
 578 }
 579 sub available {
 580         does_exist(@_);
 581 }
 582
 583
 584 1;