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package URPM;
use strict;
#- compare keys to avoid glitches introduced during the importation where
#- some characters may be modified on the fly by rpm --import...
sub compare_pubkeys {
my ($a, $b, %options) = @_;
my $diff = 0;
my @a = unpack "C*", $a->{content};
my @b = unpack "C*", $b->{content};
#- default options to use.
$options{start} ||= 0;
$options{end} ||= @a < @b ? scalar(@b) : scalar(@a);
$options{diff} ||= 1;
#- check element one by one, count all difference (do not work well if elements
#- have been inserted/deleted).
foreach ($options{start} .. $options{end}) {
$a[$_] != $b[$_] and ++$diff;
}
#- diff options give level to consider the key equal (a character is not always the same).
$diff <= $options{diff} ? 0 : $diff;
}
#- parse an armored file and import in keys hash if the key does not already exists.
sub parse_armored_file {
my (undef, $file) = @_;
my ($block, $content, @l);
#- check if an already opened file has been given directly.
unless (ref $file) {
my $F;
open $F, $file or return ();
$file = $F;
}
#- read armored file.
local $_;
while (<$file>) {
my $inside_block = /^-----BEGIN PGP PUBLIC KEY BLOCK-----$/ ... /^-----END PGP PUBLIC KEY BLOCK-----$/;
if ($inside_block) {
$block .= $_;
if ($inside_block =~ /E/) {
#- block is needed to import the key if needed.
push @l, { block => $block, content => $content };
$block = $content = undef;
} else {
#- compute content for finding the right key.
chomp;
/^$/ and $content = '';
defined $content and $content .= $_;
}
}
}
@l;
}
#- pare from rpmlib db.
sub parse_pubkeys {
my ($urpm, %options) = @_;
my ($block, $content);
my $db = $options{db};
$db ||= URPM::DB::open($options{root});
$db->traverse_tag('name', [ 'gpg-pubkey' ], sub {
my ($p) = @_;
foreach (split "\n", $p->description) {
$block ||= /^-----BEGIN PGP PUBLIC KEY BLOCK-----$/;
if ($block) {
my $inside_block = /^$/ ... /^-----END PGP PUBLIC KEY BLOCK-----$/;
if ($inside_block > 1) {
if ($inside_block =~ /E/) {
$urpm->{keys}{$p->version} = {
$p->summary =~ /^gpg\((.*)\)$/ ? (name => $1) : @{[]},
id => $p->version,
content => $content,
block => $p->description,
};
$block = undef;
$content = '';
} else {
$content .= $_;
}
}
}
}
});
}
#- import pubkeys only if it is needed.
sub import_needed_pubkeys {
my ($urpm, $l, %options) = @_;
#- use the same database handle to avoid re-opening multiple times the database.
my $db = $options{db};
$db ||= URPM::DB::open($options{root}, 1);
#- assume $l is a reference to an array containing all the keys to import
#- if needed.
foreach my $k (@{$l || []}) {
my ($id, $imported);
foreach my $kv (values %{$urpm->{keys} || {}}) {
compare_pubkeys($k, $kv, %options) == 0 and $id = $kv->{id}, last;
}
unless ($id) {
$imported = 1;
import_pubkey(block => $k->{block}, db => $db);
$urpm->parse_pubkeys(db => $db);
foreach my $kv (values %{$urpm->{keys} || {}}) {
compare_pubkeys($k, $kv, %options) == 0 and $id = $kv->{id}, last;
}
}
#- let the caller know about what has been found.
#- this is an error if the key is not found.
$options{callback} and $options{callback}->($urpm, $db, $k, $id, $imported, %options);
}
}
1;
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