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[backend] add support for slsa provenance binary pinning
We link the used binaries into $BSConfig::bsdir/slsa. An sqlite database is used to save the reference information so that no longer referenced binaries can be deleted.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| # Copyright (c) 2022 SUSE LLC | ||
| # | ||
| # This program is free software; you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License version 2 as | ||
| # published by the Free Software Foundation. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License | ||
| # along with this program (see the file COPYING); if not, write to the | ||
| # Free Software Foundation, Inc., | ||
| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA | ||
| # | ||
| package BSRepServer::SLSA; | ||
|
|
||
| use strict; | ||
|
|
||
| use BSConfiguration; | ||
| use BSUtil; | ||
| use BSSQLite; | ||
| use Digest::SHA (); | ||
| use Data::Dumper; | ||
|
|
||
| use DBI qw(:sql_types); | ||
|
|
||
| my $reporoot = "$BSConfig::bsdir/build"; | ||
| my $slsadir = "$BSConfig::bsdir/slsa"; | ||
|
|
||
| sub sha256file { | ||
| my ($fn) = @_; | ||
| my $fd; | ||
| open($fd, '<', $fn) || die("$fn: $!\n"); | ||
| my $ctx = Digest::SHA->new(256); | ||
| $ctx->addfile($fd); | ||
| close($fd); | ||
| return $ctx->hexdigest(); | ||
| } | ||
|
|
||
| sub connectdb { | ||
| my ($prpa) = @_; | ||
| mkdir_p("$slsadir/$prpa"); | ||
| my $h = BSSQLite::connectdb("$slsadir/$prpa/refs"); | ||
| create_tables($h); | ||
| return $h; | ||
| } | ||
|
|
||
| sub create_tables { | ||
| my ($h) = @_; | ||
| BSSQLite::dbdo($h, <<'EOS'); | ||
| CREATE TABLE IF NOT EXISTS refs( | ||
| prpa TEXT, | ||
| digest BLOB | ||
| ) | ||
| EOS | ||
| BSSQLite::dbdo($h, 'CREATE INDEX IF NOT EXISTS refs_idx_prpa on refs(prpa)'); | ||
| BSSQLite::dbdo($h, 'CREATE INDEX IF NOT EXISTS refs_idx_digest on refs(digest)'); | ||
| } | ||
|
|
||
| sub read_gbininfo { | ||
| my ($prpa) = @_; | ||
| my $gdst = "$reporoot/$prpa"; | ||
| my $gbininfo = BSUtil::retrieve("$gdst/:bininfo", 1) || {}; | ||
| return $gbininfo unless -e "$gdst/:bininfo.merge"; | ||
| my $gbininfo_m = BSUtil::retrieve("$gdst/:bininfo.merge", 1); | ||
| $gbininfo_m = undef if $gbininfo_m && $gbininfo_m->{'/outdated'}; | ||
| if ($gbininfo_m) { | ||
| for (keys %$gbininfo_m) { | ||
| if ($gbininfo_m->{$_}) { | ||
| $gbininfo->{$_} = $gbininfo_m->{$_}; | ||
| } else { | ||
| delete $gbininfo->{$_}; | ||
| } | ||
| } | ||
| } | ||
| return $gbininfo; | ||
| } | ||
|
|
||
| sub link_binary { | ||
| my ($prpa, $gbininfo, $hint, $digest, $tmp) = @_; | ||
|
|
||
| my $binname1 = ''; | ||
| my $binname2 = ''; | ||
| $binname1 = $hint; | ||
| $binname1 =~ s/\.[^\.]+$//; | ||
| $binname2 = $1 if $hint =~ /(.*)-([^-]+)-([^-]+)\.([^-]+)\.rpm$/; | ||
| for my $packid (sort keys %$gbininfo) { | ||
| for my $k (sort keys %{$gbininfo->{$packid}}) { | ||
| my $ent = $gbininfo->{$packid}->{$k}; | ||
| next unless $ent->{'name'} && ($ent->{'name'} eq $binname1 || $ent->{'name'} eq $binname2); | ||
| unlink($tmp); | ||
| next unless link("$reporoot/$prpa/$packid/$ent->{'filename'}", $tmp); | ||
| unlink("$tmp.prov"); | ||
| link("$reporoot/$prpa/$packid/_slsa_provenance_stmt.json", "$tmp.prov"); | ||
| return 1 if sha256file($tmp) eq $digest; | ||
| unlink($tmp); | ||
| unlink("$tmp.prov"); | ||
| } | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| sub link_binaries { | ||
| my ($prpa, $digests) = @_; | ||
|
|
||
| my $gbininfo; | ||
| for my $digest (sort keys %$digests) { | ||
| next if -e "$slsadir/$prpa/$digest"; | ||
| mkdir_p("$slsadir/$prpa"); | ||
| $gbininfo ||= read_gbininfo($prpa); | ||
| my $tmp = "$slsadir/$prpa/.incoming$$"; | ||
| die("404 binary $digests->{$digest} digest $digest does not exist in $prpa\n") unless link_binary($prpa, $gbininfo, $digests->{$digest}, $digest, $tmp); | ||
| if (!link($tmp, "$slsadir/$prpa/$digest")) { | ||
| my $err = "link $slsadir/$prpa/.incoming$$ $slsadir/$prpa/$digest: $!"; | ||
| unlink($tmp); | ||
| unlink("$tmp.prov"); | ||
| die("$err\n") unless -e "$slsadir/$prpa/$digest"; | ||
| } else { | ||
| link("$tmp.prov", "$slsadir/$prpa/$digest.prov"); | ||
| unlink($tmp); | ||
| unlink("$tmp.prov"); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| sub add_references { | ||
| my ($prpa, $refprpa, $digests) = @_; | ||
|
|
||
| link_binaries($prpa, $digests); | ||
| my $h = connectdb($prpa); | ||
| BSSQLite::begin_work($h); | ||
| my $got = $h->selectcol_arrayref("SELECT digest FROM refs WHERE prpa = ?", undef, $refprpa) || die($h->errstr); | ||
| my %got = map {pack("H*", $_) => 1} @$got; | ||
| for my $digest (grep {!$got{$_}} sort keys %$digests) { | ||
| BSSQLite::dbdo_bind($h, 'INSERT INTO refs(prpa,digest) VALUES(?,?)', [ $refprpa ], [ unpack("H*", $digest), SQL_BLOB ]); | ||
| } | ||
| BSSQLite::commit($h); | ||
| } | ||
|
|
||
| sub set_references { | ||
| my ($prpa, $refprpa, $digests) = @_; | ||
|
|
||
| link_binaries($prpa, $digests) if $digests; | ||
| my $h = connectdb($prpa); | ||
| BSSQLite::begin_work($h); | ||
| my $got = $h->selectcol_arrayref("SELECT digest FROM refs WHERE prpa = ?", undef, $refprpa) || die($h->errstr); | ||
| my %got = map {pack("H*", $_) => 1} @$got; | ||
| for my $digest (grep {!$got{$_}} sort keys %$digests) { | ||
| BSSQLite::dbdo_bind($h, 'INSERT INTO refs(prpa,digest) VALUES(?,?)', [ $refprpa ], [ unpack("H*", $digest), SQL_BLOB ]); | ||
| } | ||
| delete $got{$_} for keys %$digests; | ||
| for my $digest (sort keys %$got) { | ||
| BSSQLite::dbdo_bind($h, 'DELETE FROM refs WHERE prpa = ? AND digest = ?', [ $refprpa ], [ unpack("H*", $digest), SQL_BLOB ]); | ||
| } | ||
| BSSQLite::commit($h); | ||
| } | ||
|
|
||
| 1; |
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