line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
package Protocol::DBus::Authn::Mechanism::EXTERNAL; |
2
|
|
|
|
|
|
|
|
3
|
4
|
|
|
4
|
|
1636
|
use strict; |
|
4
|
|
|
|
|
8
|
|
|
4
|
|
|
|
|
92
|
|
4
|
4
|
|
|
4
|
|
20
|
use warnings; |
|
4
|
|
|
|
|
8
|
|
|
4
|
|
|
|
|
116
|
|
5
|
|
|
|
|
|
|
|
6
|
4
|
|
|
4
|
|
24
|
use parent 'Protocol::DBus::Authn::Mechanism'; |
|
4
|
|
|
|
|
4
|
|
|
4
|
|
|
|
|
20
|
|
7
|
|
|
|
|
|
|
|
8
|
4
|
|
|
4
|
|
128
|
use Protocol::DBus::Socket (); |
|
4
|
|
|
|
|
8
|
|
|
4
|
|
|
|
|
1212
|
|
9
|
|
|
|
|
|
|
|
10
|
|
|
|
|
|
|
# The methods of user credential retrieval that the reference D-Bus |
11
|
|
|
|
|
|
|
# server relies on prefer “out-of-band” methods like SO_PEERCRED |
12
|
|
|
|
|
|
|
# on Linux rather than SCM_CREDS. (See See dbus/dbus-sysdeps-unix.c.) |
13
|
|
|
|
|
|
|
# So for some OSes it’s just not necessary to do anything special to |
14
|
|
|
|
|
|
|
# send credentials. |
15
|
|
|
|
|
|
|
# |
16
|
|
|
|
|
|
|
# On other OSes it doesn’t seem possible to send credentials via a |
17
|
|
|
|
|
|
|
# UNIX socket in the first place. But let’s still try. |
18
|
|
|
|
|
|
|
# |
19
|
|
|
|
|
|
|
our @OS_NO_MSGHDR_LIST = ( |
20
|
|
|
|
|
|
|
|
21
|
|
|
|
|
|
|
# Reference server doesn’t need our help: |
22
|
|
|
|
|
|
|
'linux', |
23
|
|
|
|
|
|
|
'netbsd', # via LOCAL_PEEREID, which dbus calls |
24
|
|
|
|
|
|
|
|
25
|
|
|
|
|
|
|
# LOCAL_PEERCRED exists and works, but the reference server |
26
|
|
|
|
|
|
|
# doesn’t appear to use it. Nonetheless, EXTERNAL authn works |
27
|
|
|
|
|
|
|
# on these OSes. Maybe getpeereid() calls LOCAL_PEERCRED? |
28
|
|
|
|
|
|
|
'freebsd', # NB: doesn’t work w/ socketpair() |
29
|
|
|
|
|
|
|
'darwin', |
30
|
|
|
|
|
|
|
|
31
|
|
|
|
|
|
|
# 'openbsd', ??? Still trying to test. |
32
|
|
|
|
|
|
|
|
33
|
|
|
|
|
|
|
# No way to pass credentials via UNIX socket, |
34
|
|
|
|
|
|
|
# so let’s just send EXTERNAL and see what happens. |
35
|
|
|
|
|
|
|
# It’ll likely just fail over to DBUS_COOKIE_SHA1. |
36
|
|
|
|
|
|
|
'cygwin', |
37
|
|
|
|
|
|
|
'mswin32', |
38
|
|
|
|
|
|
|
); |
39
|
|
|
|
|
|
|
|
40
|
1
|
|
|
1
|
0
|
52
|
sub INITIAL_RESPONSE { unpack 'H*', $> } |
41
|
|
|
|
|
|
|
|
42
|
|
|
|
|
|
|
# The reference server implementation does a number of things to try to |
43
|
|
|
|
|
|
|
# fetch the peer credentials. . |
44
|
|
|
|
|
|
|
sub must_send_initial { |
45
|
6
|
|
|
6
|
0
|
23
|
my ($self) = @_; |
46
|
|
|
|
|
|
|
|
47
|
6
|
100
|
|
|
|
31
|
if (!defined $self->{'_must_send_initial'}) { |
48
|
|
|
|
|
|
|
|
49
|
5
|
|
|
|
|
14
|
my $can_skip_msghdr = grep { $_ eq $^O } @OS_NO_MSGHDR_LIST; |
|
30
|
|
|
|
|
71
|
|
50
|
|
|
|
|
|
|
|
51
|
5
|
|
33
|
|
|
15
|
$can_skip_msghdr ||= eval { my $v = Socket::SO_PEERCRED(); 1 }; |
|
0
|
|
|
|
|
0
|
|
|
0
|
|
|
|
|
0
|
|
52
|
5
|
|
33
|
|
|
14
|
$can_skip_msghdr ||= eval { my $v = Socket::LOCAL_PEEREID(); 1 }; |
|
0
|
|
|
|
|
0
|
|
|
0
|
|
|
|
|
0
|
|
53
|
|
|
|
|
|
|
|
54
|
|
|
|
|
|
|
# As of this writing it seems FreeBSD and DragonflyBSD do require |
55
|
|
|
|
|
|
|
# Socket::MsgHdr, even though they both have LOCAL_PEERCRED which |
56
|
|
|
|
|
|
|
# should take care of that. |
57
|
5
|
|
|
|
|
27
|
$self->{'_must_send_initial'} = !$can_skip_msghdr; |
58
|
|
|
|
|
|
|
} |
59
|
|
|
|
|
|
|
|
60
|
6
|
|
|
|
|
24
|
return $self->{'_must_send_initial'}; |
61
|
|
|
|
|
|
|
} |
62
|
|
|
|
|
|
|
|
63
|
|
|
|
|
|
|
sub send_initial { |
64
|
0
|
|
|
0
|
0
|
|
my ($self, $s) = @_; |
65
|
|
|
|
|
|
|
|
66
|
0
|
0
|
|
|
|
|
eval { require Socket::MsgHdr; 1 } or do { |
|
0
|
|
|
|
|
|
|
|
0
|
|
|
|
|
|
|
67
|
0
|
|
|
|
|
|
die "Socket::MsgHdr appears to be needed for EXTERNAL authn (OS=$^O) but failed to load: $@"; |
68
|
|
|
|
|
|
|
}; |
69
|
|
|
|
|
|
|
|
70
|
0
|
|
|
|
|
|
my $msg = Socket::MsgHdr->new( buf => "\0" ); |
71
|
|
|
|
|
|
|
|
72
|
|
|
|
|
|
|
# The kernel should fill in the payload. |
73
|
0
|
|
|
|
|
|
$msg->cmsghdr( Socket::SOL_SOCKET(), Socket::SCM_CREDS(), "\0" x 64 ); |
74
|
|
|
|
|
|
|
|
75
|
0
|
|
|
|
|
|
local $!; |
76
|
0
|
|
|
|
|
|
my $ok = Protocol::DBus::Socket::sendmsg_nosignal($s, $msg, 0); |
77
|
|
|
|
|
|
|
|
78
|
0
|
0
|
0
|
|
|
|
if (!$ok && !$!{'EAGAIN'}) { |
79
|
0
|
|
|
|
|
|
die "sendmsg($s): $!"; |
80
|
|
|
|
|
|
|
} |
81
|
|
|
|
|
|
|
|
82
|
0
|
|
|
|
|
|
return $ok; |
83
|
|
|
|
|
|
|
} |
84
|
|
|
|
|
|
|
|
85
|
|
|
|
|
|
|
1; |