This file is indexed.

/usr/share/perl5/Net/OpenID/Association.pm is in libnet-openid-consumer-perl 1.18-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
use strict;
use Carp ();

############################################################################
package Net::OpenID::Association;
$Net::OpenID::Association::VERSION = '1.18';
use fields (
            'server',    # author-identity identity provider endpoint
            'secret',    # the secret for this association
            'handle',    # the 255-character-max ASCII printable handle (33-126)
            'expiry',    # unixtime, adjusted, of when this association expires
            'type',      # association type
            );

use Storable ();
use Digest::SHA ();
use Net::OpenID::Common;
use URI::Escape qw(uri_escape);

################################################################
# Association and Session Types

# session type hash
#    name  - by which session type appears in URI parameters (required)
#    len   - number of bytes in digest (undef => accommodates any length)
#    fn    - DH hash function (undef => secret passed in the clear)
#    https - must use encrypted connection (boolean)
#
my %_session_types = ();
# {versionkey}{name} -> session type
# {NO}{versionkey}   -> no-encryption stype for this version
# {MAX}{versionkey}  -> strongest encryption stype for this version

# association type hash
#    name  - by which assoc. type appears in URI parameters (required)
#    len   - number of bytes in digest (required)
#    macfn - MAC hash function (required)
#
my %_assoc_types   = ();
# {versionkey}{name} -> association type
# {MAX}{versionkey}  -> strongest encryption atype for this version

my %_assoc_macfn   = ();
# {name} -> hmac function
# ... since association types in the cache are only listed by name
# and don't say what version they're from.  Which should not matter
# as long as the macfn associated with a given association type
# name does not change in future versions.

# (floating point version numbers scare me)
# (also version key can stay the same if the
#  set of hash functions available does not change)
# ('NO' and 'MAX' should never be used as version keys)
sub _version_key_from_numeric {
    my ($numeric_protocol_version) = @_;
    return $numeric_protocol_version < 2 ? 'v1' : 'v2';
}
# can SESSION_TYPE be used with ASSOC_TYPE?
sub _compatible_stype_atype {
    my ($s_type, $a_type) = @_;
    return !$s_type->{len} || $s_type->{len} == $a_type->{len};
}

{
    # Define the no-encryption session types.
    # In version 1.1/1.0, the no-encryption session type
    # is the default and never explicitly specified
    $_session_types{$_->[0]}{$_->[1]}
      = $_session_types{NO}{$_->[0]}
        = {
           name => $_->[1],
           https => 1,
          }
          foreach ([v1 => ''], [v2 => 'no-encryption']);

    # Define SHA-based session and association types
    my %_sha_fns =
      (
       SHA1   => { minv  => 'v1', # first version group in which this appears
                   v1max => 1,    # best encryption for v1
                   len   => 20,   # number of bytes in digest
                   fn    => \&Digest::SHA::sha1,
                   macfn => \&Digest::SHA::hmac_sha1,  },
       SHA256 => { minv  => 'v2',
                   v2max => 1,  # best encryption for v2
                   len   => 32,
                   fn    => \&Digest::SHA::sha256,
                   macfn => \&Digest::SHA::hmac_sha256,  },
       # doubtless there will be more...
      );
    foreach my $SHAX (keys %_sha_fns) {
        my $s = $_sha_fns{$SHAX};
        my $a_type = { name => "HMAC-${SHAX}", map {$_,$s->{$_}} qw(len macfn) };
        my $s_type = { name => "DH-${SHAX}",   map {$_,$s->{$_}} qw(len fn) };
        my $seen_minv = 0;
        foreach my $v (qw(v1 v2)) {
            $seen_minv = 1 if $v eq $s->{minv};
            next unless $seen_minv;
            $_assoc_types{$v}{$a_type->{name}} = $a_type;
            $_session_types{$v}{$s_type->{name}} = $s_type;
            if ($s->{"${v}max"}) {
                $_assoc_types{MAX}{$v} = $a_type;
                $_session_types{MAX}{$v} = $s_type;
            }
        }
        $_assoc_macfn{$a_type->{name}} = $a_type->{macfn};
    }
}
################################################################

sub new {
    my Net::OpenID::Association $self = shift;
    $self = fields::new( $self ) unless ref $self;
    my %opts = @_;
    for my $f (qw( server secret handle expiry type )) {
        $self->{$f} = delete $opts{$f};
    }
    Carp::croak("unknown options: " . join(", ", keys %opts)) if %opts;
    return $self;
}

sub handle {
    my $self = shift;
    die if @_;
    $self->{'handle'};
}

sub secret {
    my $self = shift;
    die if @_;
    $self->{'secret'};
}

sub type {
    my $self = shift;
    die if @_;
    $self->{'type'};
}

sub generate_signature {
    my Net::OpenID::Association $self = shift;
    my $string = shift;
    return OpenID::util::b64($_assoc_macfn{$self->type}->($string, $self->secret));
}

sub server {
    my Net::OpenID::Association $self = shift;
    Carp::croak("Too many parameters") if @_;
    return $self->{server};
}

sub expired {
    my Net::OpenID::Association $self = shift;
    return time() > $self->{'expiry'};
}

sub usable {
    my Net::OpenID::Association $self = shift;
    return 0 unless $self->{'handle'} =~ /^[\x21-\x7e]{1,255}$/;
    return 0 unless $self->{'expiry'} =~ /^\d+$/;
    return 0 unless $self->{'secret'};
    return 0 if $self->expired;
    return 1;
}


# server_assoc(CSR, SERVER, FORCE_REASSOCIATE, OPTIONS...)
#
# Return an association for SERVER (provider), whether already
# cached and not yet expired, or freshly negotiated.
# Return undef if no local storage/cache is available
# or negotiation fails for whatever reason,
# in which case the caller goes into dumb consumer mode.
# FORCE_REASSOCIATE true => ignore the cache
# OPTIONS... are passed to new_server_assoc()
#
sub server_assoc {
    my ($csr, $server, $force_reassociate, @opts) = @_;

    # closure to return undef (dumb consumer mode) and log why
    my $dumb = sub {
        $csr->_debug("server_assoc: dumb mode: $_[0]");
        return undef;
    };

    my $cache = $csr->cache;
    return $dumb->("no_cache") unless $cache;

    unless ($force_reassociate) {
        # try first from cached association handle
        if (my $handle = $cache->get("shandle:$server")) {
            my $assoc = handle_assoc($csr, $server, $handle);

            if ($assoc && $assoc->usable) {
                $csr->_debug("Found association from cache (handle=$handle)");
                return $assoc;
            }
        }
    }

    # make a new association
    my ($assoc, $err, $retry) = new_server_assoc($csr, $server, @opts);
    return $dumb->($err)
      if $err;
    ($assoc, $err) = new_server_assoc($csr, $server, @opts, %$retry)
      if $retry;
    return $dumb->($err || 'second_retry')
      unless $assoc;

    my $ahandle = $assoc->handle;
    $cache->set("hassoc:$server:$ahandle", Storable::freeze({%$assoc}));
    $cache->set("shandle:$server", $ahandle);

    # now we test that the cache object given to us actually works.  if it
    # doesn't, it'll also fail later, making the verify fail, so let's
    # go into stateless (dumb mode) earlier if we can detect this.
    $cache->get("shandle:$server")
        or return $dumb->("cache_broken");

    return $assoc;
}

# new_server_assoc(CSR, SERVER, OPTIONS...)
#
# Attempts to negotiate a fresh association from C<$server> (provider)
# with session and association types determined by OPTIONS...
# (accepts protocol_version and all assoc_options from Consumer,
#  however max_encrypt and session_no_encrypt_https are ignored
#  if assoc_type and session_type are passed directly as hashes)
# Returns
#   ($association) on success
#   (undef, $error_message) on unrecoverable failure
#   (undef, undef, {retry...}) if identity provider suggested
#     alternate session/assoc types in an error response
#
sub new_server_assoc {
    my ($csr, $server, %opts) = @_;
    my $server_is_https = lc($server) =~ m/^https:/;
    my $protocol_version = delete $opts{protocol_version} || 1;
    my $version_key = _version_key_from_numeric($protocol_version);
    my $allow_eavesdropping = (delete $opts{allow_eavesdropping} || 0) && $protocol_version < 2;

    my $a_maxencrypt = delete $opts{max_encrypt} || 0;
    my $s_noencrypt  = delete $opts{session_no_encrypt_https} && $server_is_https;

    my $s_type = delete $opts{session_type} || "DH-SHA1";
    unless (ref $s_type) {
        if ($s_noencrypt) {
            $s_type = $_session_types{NO}{$version_key};
        }
        elsif ($a_maxencrypt) {
            $s_type = $_session_types{MAX}{$version_key};
        }
    }

    my $a_type = delete $opts{assoc_type} || "HMAC-SHA1";
    unless (ref $a_type) {
        $a_type = $_assoc_types{MAX}{$version_key}
          if $a_maxencrypt;
    }

    Carp::croak("unknown options: " . join(", ", keys %opts)) if %opts;

    $a_type = $_assoc_types{$version_key}{$a_type} unless ref $a_type;
    Carp::croak("unknown association type") unless $a_type;

    $s_type = $_session_types{$version_key}{$s_type} unless ref $s_type;
    Carp::croak("unknown session type") unless $s_type;

    my $error = sub { return (undef, $_[0].($_[1]?" ($_[1])":'')); };

    return $error->("incompatible_session_type")
      unless _compatible_stype_atype($s_type, $a_type);

    return $error->("https_required")
      if $s_type->{https} && !$server_is_https && !$allow_eavesdropping;

    my %post = ( "openid.mode" => "associate" );
    $post{'openid.ns'} = OpenID::util::version_2_namespace()
      if $protocol_version == 2;
    $post{'openid.assoc_type'} = $a_type->{name};
    $post{'openid.session_type'} = $s_type->{name} if $s_type->{name};

    my $dh;
    if ($s_type->{fn}) {
        $dh = OpenID::util::get_dh();
        $post{'openid.dh_consumer_public'} = OpenID::util::int2arg($dh->pub_key);
    }

    my $req = HTTP::Request->new(POST => $server);
    $req->header("Content-Type" => "application/x-www-form-urlencoded");
    $req->content(join("&", map { "$_=" . uri_escape($post{$_}) } keys %post));

    $csr->_debug("Associate mode request: " . $req->content);

    my $ua  = $csr->ua;
    my $res = $ua->request($req);

    return $error->("http_no_response") unless $res;

    my $recv_time = time();
    my $content = $res->content;
    my %args = OpenID::util::parse_keyvalue($content);
    $csr->_debug("Response to associate mode: [$content] parsed = " . join(",", %args));

    my $r_a_type = $_assoc_types{$version_key}{$args{'assoc_type'}};
    my $r_s_type = $_session_types{$version_key}{$args{'session_type'}||''};

    unless ($res->is_success) {
        # direct error
        return $error->("http_failure_no_associate")
          if ($protocol_version < 2);
        return $error->("http_direct_error")
          unless $args{'error_code'} eq 'unsupported_type';
        return (undef,undef,{assoc_type => $r_a_type, session_type => $r_s_type})
          if $r_a_type && $r_s_type && ($r_a_type != $a_type || $r_s_type != $s_type);
        return $error->("unsupported_type");
    }
    return $error->("unknown_assoc_type",$args{'assoc_type'})
      unless $r_a_type;
    return $error->("unknown_session_type",$args{'session_type'})
      unless $r_s_type;
    return $error->("wrong_assoc_type",$r_a_type->{name})
      unless $a_type == $r_a_type;
    return $error->("wrong_session_type",$r_s_type->{name})
      unless $s_type == $r_s_type || ($protocol_version < 2);

    # protocol version 1.1
    my $expires_in = $args{'expires_in'};

    # protocol version 1.0 (DEPRECATED)
    if (! $expires_in) {
        if (my $issued = OpenID::util::w3c_to_time($args{'issued'})) {
            my $expiry = OpenID::util::w3c_to_time($args{'expiry'});
            my $replace_after = OpenID::util::w3c_to_time($args{'replace_after'});

            # seconds ahead (positive) or behind (negative) the provider is
            $expires_in = ($replace_after || $expiry) - $issued;
        }
    }

    # between 1 second and 2 years
    return $error->("bogus_expires_in")
      unless $expires_in > 0 && $expires_in < 63072000;

    my $ahandle = $args{'assoc_handle'};

    my $secret;
    unless ($r_s_type->{fn}) {
        $secret = OpenID::util::d64($args{'mac_key'});
    }
    else {
        my $server_pub = OpenID::util::arg2int($args{'dh_server_public'});
        my $dh_sec = $dh->compute_secret($server_pub);
        $secret = OpenID::util::d64($args{'enc_mac_key'})
          ^ $r_s_type->{fn}->(OpenID::util::int2bytes($dh_sec));
    }
    return $error->("bad_secret_length")
      if $r_s_type->{len} && length($secret) != $r_s_type->{len};

    my %assoc = (
                 handle => $ahandle,
                 server => $server,
                 secret => $secret,
                 type   => $r_a_type->{name},
                 expiry => $recv_time + $expires_in,
                 );

    return Net::OpenID::Association->new( %assoc );
}

# returns association, or undef if it can't be found
sub handle_assoc {
    my ($csr, $server, $handle) = @_;

    # closure to return undef (dumb consumer mode) and log why
    my $dumb = sub {
        $csr->_debug("handle_assoc: dumb mode: $_[0]");
        return undef;
    };

    return $dumb->("no_handle") unless $handle;

    my $cache = $csr->cache;
    return $dumb->("no_cache") unless $cache;

    my $frozen = $cache->get("hassoc:$server:$handle");
    return $dumb->("not_in_cache") unless $frozen;

    my $param = eval { Storable::thaw($frozen) };
    return $dumb->("not_a_hashref") unless ref $param eq "HASH";

    return Net::OpenID::Association->new( %$param );
}

sub invalidate_handle {
    my ($csr, $server, $handle) = @_;
    my $cache = $csr->cache
        or return;
    $cache->set("hassoc:$server:$handle", "");
}

1;

__END__

=head1 NAME

Net::OpenID::Association - A relationship with an identity provider

=head1 VERSION

version 1.18

=head1 DESCRIPTION

Internal class.

=head1 COPYRIGHT, WARRANTY, AUTHOR

See L<Net::OpenID::Consumer> for author, copyright and licensing information.

=head1 SEE ALSO

L<Net::OpenID::Consumer>

L<Net::OpenID::VerifiedIdentity>

L<Net::OpenID::Server>

Website:  L<http://openid.net/>