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513d8ab6 |
1 | package Catalyst::Authentication::Credential::HTTP; |
490754a8 |
2 | use base qw/Catalyst::Authentication::Credential::Password/; |
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3 | |
4 | use strict; |
5 | use warnings; |
6 | |
7 | use String::Escape (); |
8 | use URI::Escape (); |
9 | use Catalyst (); |
10 | use Digest::MD5 (); |
11 | |
513d8ab6 |
12 | BEGIN { |
13 | __PACKAGE__->mk_accessors(qw/_config realm/); |
14 | } |
d99b7693 |
15 | |
490754a8 |
16 | our $VERSION = "1.002"; |
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17 | |
513d8ab6 |
18 | sub new { |
19 | my ($class, $config, $app, $realm) = @_; |
20 | |
21 | my $self = { _config => $config, _debug => $app->debug }; |
22 | bless $self, $class; |
23 | |
24 | $self->realm($realm); |
25 | |
26 | my $type = $self->_config->{'type'} ||= 'any'; |
27 | |
28 | if (!grep /$type/, ('basic', 'digest', 'any')) { |
29 | Catalyst::Exception->throw(__PACKAGE__ . " used with unsupported authentication type: " . $type); |
30 | } |
31 | return $self; |
d99b7693 |
32 | } |
33 | |
513d8ab6 |
34 | sub authenticate { |
35 | my ( $self, $c, $realm, $auth_info ) = @_; |
36 | my $auth; |
d99b7693 |
37 | |
513d8ab6 |
38 | $auth = $self->authenticate_digest($c, $realm, $auth_info) if $self->_is_http_auth_type('digest'); |
39 | return $auth if $auth; |
d99b7693 |
40 | |
513d8ab6 |
41 | $auth = $self->authenticate_basic($c, $realm, $auth_info) if $self->_is_http_auth_type('basic'); |
42 | return $auth if $auth; |
43 | |
44 | $self->authorization_required_response($c, $realm, $auth_info); |
45 | die $Catalyst::DETACH; |
d99b7693 |
46 | } |
47 | |
48 | sub authenticate_basic { |
513d8ab6 |
49 | my ( $self, $c, $realm, $auth_info ) = @_; |
d99b7693 |
50 | |
51 | $c->log->debug('Checking http basic authentication.') if $c->debug; |
52 | |
53 | my $headers = $c->req->headers; |
54 | |
55 | if ( my ( $username, $password ) = $headers->authorization_basic ) { |
513d8ab6 |
56 | my $user_obj = $realm->find_user( { username => $username }, $c); |
57 | if (ref($user_obj)) { |
490754a8 |
58 | if ($self->check_password($user_obj, {$self->_config->{password_field} => $password})) { |
513d8ab6 |
59 | $c->set_authenticated($user_obj); |
60 | return $user_obj; |
d99b7693 |
61 | } |
62 | } |
513d8ab6 |
63 | else { |
64 | $c->log->debug("Unable to locate user matching user info provided") if $c->debug; |
65 | return; |
66 | } |
d99b7693 |
67 | } |
68 | |
513d8ab6 |
69 | return; |
d99b7693 |
70 | } |
71 | |
72 | sub authenticate_digest { |
513d8ab6 |
73 | my ( $self, $c, $realm, $auth_info ) = @_; |
d99b7693 |
74 | |
75 | $c->log->debug('Checking http digest authentication.') if $c->debug; |
76 | |
77 | my $headers = $c->req->headers; |
78 | my @authorization = $headers->header('Authorization'); |
79 | foreach my $authorization (@authorization) { |
80 | next unless $authorization =~ m{^Digest}; |
d99b7693 |
81 | my %res = map { |
82 | my @key_val = split /=/, $_, 2; |
83 | $key_val[0] = lc $key_val[0]; |
84 | $key_val[1] =~ s{"}{}g; # remove the quotes |
85 | @key_val; |
86 | } split /,\s?/, substr( $authorization, 7 ); #7 == length "Digest " |
87 | |
88 | my $opaque = $res{opaque}; |
513d8ab6 |
89 | my $nonce = $self->get_digest_authorization_nonce( $c, __PACKAGE__ . '::opaque:' . $opaque ); |
d99b7693 |
90 | next unless $nonce; |
91 | |
92 | $c->log->debug('Checking authentication parameters.') |
93 | if $c->debug; |
94 | |
95 | my $uri = '/' . $c->request->path; |
96 | my $algorithm = $res{algorithm} || 'MD5'; |
97 | my $nonce_count = '0x' . $res{nc}; |
98 | |
99 | my $check = $uri eq $res{uri} |
100 | && ( exists $res{username} ) |
101 | && ( exists $res{qop} ) |
102 | && ( exists $res{cnonce} ) |
103 | && ( exists $res{nc} ) |
104 | && $algorithm eq $nonce->algorithm |
105 | && hex($nonce_count) > hex( $nonce->nonce_count ) |
106 | && $res{nonce} eq $nonce->nonce; # TODO: set Stale instead |
107 | |
108 | unless ($check) { |
109 | $c->log->debug('Digest authentication failed. Bad request.') |
110 | if $c->debug; |
111 | $c->res->status(400); # bad request |
513d8ab6 |
112 | Carp::confess $Catalyst::DETACH; |
d99b7693 |
113 | } |
114 | |
115 | $c->log->debug('Checking authentication response.') |
116 | if $c->debug; |
117 | |
118 | my $username = $res{username}; |
d99b7693 |
119 | |
120 | my $user; |
121 | |
513d8ab6 |
122 | unless ( $user = $auth_info->{user} ) { |
123 | $user = $realm->find_user( { username => $username }, $c); |
d99b7693 |
124 | } |
d99b7693 |
125 | unless ($user) { # no user, no authentication |
513d8ab6 |
126 | $c->log->debug("Unable to locate user matching user info provided") if $c->debug; |
127 | return; |
d99b7693 |
128 | } |
129 | |
130 | # everything looks good, let's check the response |
d99b7693 |
131 | # calculate H(A2) as per spec |
132 | my $ctx = Digest::MD5->new; |
133 | $ctx->add( join( ':', $c->request->method, $res{uri} ) ); |
134 | if ( $res{qop} eq 'auth-int' ) { |
135 | my $digest = |
136 | Digest::MD5::md5_hex( $c->request->body ); # not sure here |
137 | $ctx->add( ':', $digest ); |
138 | } |
139 | my $A2_digest = $ctx->hexdigest; |
140 | |
141 | # the idea of the for loop: |
142 | # if we do not want to store the plain password in our user store, |
143 | # we can store md5_hex("$username:$realm:$password") instead |
490754a8 |
144 | my $password_field = $self->_config->{password_field}; |
d99b7693 |
145 | for my $r ( 0 .. 1 ) { |
490754a8 |
146 | # FIXME - Do not assume accessor is called password. |
d99b7693 |
147 | # calculate H(A1) as per spec |
490754a8 |
148 | my $A1_digest = $r ? $user->$password_field() : do { |
d99b7693 |
149 | $ctx = Digest::MD5->new; |
490754a8 |
150 | $ctx->add( join( ':', $username, $realm->name, $user->$password_field() ) ); |
d99b7693 |
151 | $ctx->hexdigest; |
152 | }; |
153 | if ( $nonce->algorithm eq 'MD5-sess' ) { |
154 | $ctx = Digest::MD5->new; |
155 | $ctx->add( join( ':', $A1_digest, $res{nonce}, $res{cnonce} ) ); |
156 | $A1_digest = $ctx->hexdigest; |
157 | } |
158 | |
513d8ab6 |
159 | my $digest_in = join( ':', |
d99b7693 |
160 | $A1_digest, $res{nonce}, |
161 | $res{qop} ? ( $res{nc}, $res{cnonce}, $res{qop} ) : (), |
513d8ab6 |
162 | $A2_digest ); |
163 | my $rq_digest = Digest::MD5::md5_hex($digest_in); |
d99b7693 |
164 | $nonce->nonce_count($nonce_count); |
165 | $c->cache->set( __PACKAGE__ . '::opaque:' . $nonce->opaque, |
166 | $nonce ); |
513d8ab6 |
167 | if ($rq_digest eq $res{response}) { |
168 | $c->set_authenticated($user); |
169 | return 1; |
170 | } |
d99b7693 |
171 | } |
172 | } |
513d8ab6 |
173 | return; |
d99b7693 |
174 | } |
175 | |
176 | sub _check_cache { |
177 | my $c = shift; |
178 | |
179 | die "A cache is needed for http digest authentication." |
180 | unless $c->can('cache'); |
513d8ab6 |
181 | return; |
d99b7693 |
182 | } |
183 | |
184 | sub _is_http_auth_type { |
513d8ab6 |
185 | my ( $self, $type ) = @_; |
186 | my $cfgtype = lc( $self->_config->{'type'} || 'any' ); |
d99b7693 |
187 | return 1 if $cfgtype eq 'any' || $cfgtype eq lc $type; |
188 | return 0; |
189 | } |
190 | |
d99b7693 |
191 | sub authorization_required_response { |
513d8ab6 |
192 | my ( $self, $c, $realm, $auth_info ) = @_; |
d99b7693 |
193 | |
194 | $c->res->status(401); |
195 | $c->res->content_type('text/plain'); |
513d8ab6 |
196 | if (exists $self->_config->{authorization_required_message}) { |
197 | # If you set the key to undef, don't stamp on the body. |
198 | $c->res->body($self->_config->{authorization_required_message}) |
199 | if defined $c->res->body($self->_config->{authorization_required_message}); |
200 | } |
201 | else { |
202 | $c->res->body('Authorization required.'); |
203 | } |
d99b7693 |
204 | |
205 | # *DONT* short circuit |
206 | my $ok; |
513d8ab6 |
207 | $ok++ if $self->_create_digest_auth_response($c, $auth_info); |
208 | $ok++ if $self->_create_basic_auth_response($c, $auth_info); |
d99b7693 |
209 | |
210 | unless ( $ok ) { |
211 | die 'Could not build authorization required response. ' |
212 | . 'Did you configure a valid authentication http type: ' |
213 | . 'basic, digest, any'; |
214 | } |
513d8ab6 |
215 | return; |
d99b7693 |
216 | } |
217 | |
218 | sub _add_authentication_header { |
219 | my ( $c, $header ) = @_; |
513d8ab6 |
220 | $c->response->headers->push_header( 'WWW-Authenticate' => $header ); |
221 | return; |
d99b7693 |
222 | } |
223 | |
224 | sub _create_digest_auth_response { |
513d8ab6 |
225 | my ( $self, $c, $opts ) = @_; |
d99b7693 |
226 | |
513d8ab6 |
227 | return unless $self->_is_http_auth_type('digest'); |
d99b7693 |
228 | |
513d8ab6 |
229 | if ( my $digest = $self->_build_digest_auth_header( $c, $opts ) ) { |
230 | _add_authentication_header( $c, $digest ); |
d99b7693 |
231 | return 1; |
232 | } |
233 | |
234 | return; |
235 | } |
236 | |
237 | sub _create_basic_auth_response { |
513d8ab6 |
238 | my ( $self, $c, $opts ) = @_; |
d99b7693 |
239 | |
513d8ab6 |
240 | return unless $self->_is_http_auth_type('basic'); |
d99b7693 |
241 | |
513d8ab6 |
242 | if ( my $basic = $self->_build_basic_auth_header( $c, $opts ) ) { |
243 | _add_authentication_header( $c, $basic ); |
d99b7693 |
244 | return 1; |
245 | } |
246 | |
247 | return; |
248 | } |
249 | |
250 | sub _build_auth_header_realm { |
bf399285 |
251 | my ( $self, $c, $opts ) = @_; |
252 | if ( my $realm_name = String::Escape::qprintable($opts->{realm} ? $opts->{realm} : $self->realm->name) ) { |
513d8ab6 |
253 | $realm_name = qq{"$realm_name"} unless $realm_name =~ /^"/; |
254 | return 'realm=' . $realm_name; |
255 | } |
256 | return; |
d99b7693 |
257 | } |
258 | |
259 | sub _build_auth_header_domain { |
513d8ab6 |
260 | my ( $self, $c, $opts ) = @_; |
d99b7693 |
261 | |
262 | if ( my $domain = $opts->{domain} ) { |
263 | Catalyst::Exception->throw("domain must be an array reference") |
264 | unless ref($domain) && ref($domain) eq "ARRAY"; |
265 | |
266 | my @uris = |
513d8ab6 |
267 | $self->_config->{use_uri_for} |
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268 | ? ( map { $c->uri_for($_) } @$domain ) |
269 | : ( map { URI::Escape::uri_escape($_) } @$domain ); |
270 | |
271 | return qq{domain="@uris"}; |
513d8ab6 |
272 | } |
273 | return; |
d99b7693 |
274 | } |
275 | |
276 | sub _build_auth_header_common { |
513d8ab6 |
277 | my ( $self, $c, $opts ) = @_; |
d99b7693 |
278 | |
279 | return ( |
bf399285 |
280 | $self->_build_auth_header_realm($c, $opts), |
513d8ab6 |
281 | $self->_build_auth_header_domain($c, $opts), |
d99b7693 |
282 | ); |
283 | } |
284 | |
285 | sub _build_basic_auth_header { |
513d8ab6 |
286 | my ( $self, $c, $opts ) = @_; |
287 | return _join_auth_header_parts( Basic => $self->_build_auth_header_common( $c, $opts ) ); |
d99b7693 |
288 | } |
289 | |
290 | sub _build_digest_auth_header { |
513d8ab6 |
291 | my ( $self, $c, $opts ) = @_; |
d99b7693 |
292 | |
513d8ab6 |
293 | my $nonce = $self->_digest_auth_nonce($c, $opts); |
d99b7693 |
294 | |
295 | my $key = __PACKAGE__ . '::opaque:' . $nonce->opaque; |
296 | |
513d8ab6 |
297 | $self->store_digest_authorization_nonce( $c, $key, $nonce ); |
a14203f8 |
298 | |
513d8ab6 |
299 | return _join_auth_header_parts( Digest => |
300 | $self->_build_auth_header_common($c, $opts), |
d99b7693 |
301 | map { sprintf '%s="%s"', $_, $nonce->$_ } qw( |
302 | qop |
303 | nonce |
304 | opaque |
305 | algorithm |
306 | ), |
307 | ); |
308 | } |
a14203f8 |
309 | |
d99b7693 |
310 | sub _digest_auth_nonce { |
513d8ab6 |
311 | my ( $self, $c, $opts ) = @_; |
d99b7693 |
312 | |
313 | my $package = __PACKAGE__ . '::Nonce'; |
314 | |
315 | my $nonce = $package->new; |
316 | |
513d8ab6 |
317 | if ( my $algorithm = $opts->{algorithm} || $self->_config->{algorithm}) { |
d99b7693 |
318 | $nonce->algorithm( $algorithm ); |
319 | } |
320 | |
321 | return $nonce; |
322 | } |
323 | |
324 | sub _join_auth_header_parts { |
513d8ab6 |
325 | my ( $type, @parts ) = @_; |
d99b7693 |
326 | return "$type " . join(", ", @parts ); |
327 | } |
328 | |
329 | sub get_digest_authorization_nonce { |
513d8ab6 |
330 | my ( $self, $c, $key ) = @_; |
331 | |
332 | _check_cache($c); |
333 | return $c->cache->get( $key ); |
d99b7693 |
334 | } |
335 | |
336 | sub store_digest_authorization_nonce { |
513d8ab6 |
337 | my ( $self, $c, $key, $nonce ) = @_; |
d99b7693 |
338 | |
513d8ab6 |
339 | _check_cache($c); |
340 | return $c->cache->set( $key, $nonce ); |
d99b7693 |
341 | } |
342 | |
513d8ab6 |
343 | package Catalyst::Authentication::Credential::HTTP::Nonce; |
d99b7693 |
344 | |
345 | use strict; |
346 | use base qw[ Class::Accessor::Fast ]; |
347 | use Data::UUID (); |
348 | |
513d8ab6 |
349 | our $VERSION = '0.02'; |
d99b7693 |
350 | |
351 | __PACKAGE__->mk_accessors(qw[ nonce nonce_count qop opaque algorithm ]); |
352 | |
353 | sub new { |
354 | my $class = shift; |
355 | my $self = $class->SUPER::new(@_); |
356 | |
357 | $self->nonce( Data::UUID->new->create_b64 ); |
358 | $self->opaque( Data::UUID->new->create_b64 ); |
359 | $self->qop('auth,auth-int'); |
360 | $self->nonce_count('0x0'); |
361 | $self->algorithm('MD5'); |
362 | |
363 | return $self; |
364 | } |
a14203f8 |
365 | |
a14203f8 |
366 | 1; |
367 | |
a14203f8 |
368 | __END__ |
369 | |
a14203f8 |
370 | =pod |
371 | |
a14203f8 |
372 | =head1 NAME |
373 | |
513d8ab6 |
374 | Catalyst::Authentication::Credential::HTTP - HTTP Basic and Digest authentication |
53306b93 |
375 | for Catalyst. |
a14203f8 |
376 | |
a14203f8 |
377 | =head1 SYNOPSIS |
378 | |
a14203f8 |
379 | use Catalyst qw/ |
a14203f8 |
380 | Authentication |
a14203f8 |
381 | /; |
382 | |
513d8ab6 |
383 | __PACKAGE__->config( authentication => { |
384 | realms => { |
385 | example => { |
386 | credential => { |
387 | class => 'HTTP', |
388 | type => 'any', # or 'digest' or 'basic' |
490754a8 |
389 | password_type => 'clear', |
390 | password_field => 'password' |
513d8ab6 |
391 | }, |
392 | store => { |
393 | class => 'Minimal', |
394 | users => { |
395 | Mufasa => { password => "Circle Of Life", }, |
396 | }, |
397 | }, |
398 | }, |
399 | } |
400 | }); |
d99b7693 |
401 | |
402 | sub foo : Local { |
403 | my ( $self, $c ) = @_; |
404 | |
513d8ab6 |
405 | $c->authenticate({ realm => "example" }); |
d99b7693 |
406 | # either user gets authenticated or 401 is sent |
bf399285 |
407 | # Note that the authentication realm sent to the client is overridden |
408 | # here, but this does not affect the Catalyst::Authentication::Realm |
409 | # used for authentication. |
d99b7693 |
410 | |
411 | do_stuff(); |
412 | } |
413 | |
414 | # with ACL plugin |
513d8ab6 |
415 | __PACKAGE__->deny_access_unless("/path", sub { $_[0]->authenticate }); |
d99b7693 |
416 | |
a14203f8 |
417 | =head1 DESCRIPTION |
418 | |
513d8ab6 |
419 | This module lets you use HTTP authentication with |
d99b7693 |
420 | L<Catalyst::Plugin::Authentication>. Both basic and digest authentication |
421 | are currently supported. |
422 | |
423 | When authentication is required, this module sets a status of 401, and |
424 | the body of the response to 'Authorization required.'. To override |
425 | this and set your own content, check for the C<< $c->res->status == |
426 | 401 >> in your C<end> action, and change the body accordingly. |
427 | |
428 | =head2 TERMS |
429 | |
430 | =over 4 |
431 | |
432 | =item Nonce |
433 | |
434 | A nonce is a one-time value sent with each digest authentication |
435 | request header. The value must always be unique, so per default the |
436 | last value of the nonce is kept using L<Catalyst::Plugin::Cache>. To |
437 | change this behaviour, override the |
438 | C<store_digest_authorization_nonce> and |
439 | C<get_digest_authorization_nonce> methods as shown below. |
440 | |
441 | =back |
442 | |
443 | =head1 METHODS |
444 | |
445 | =over 4 |
446 | |
513d8ab6 |
447 | =item new $config, $c, $realm |
d99b7693 |
448 | |
513d8ab6 |
449 | Simple constructor. |
d99b7693 |
450 | |
513d8ab6 |
451 | =item authenticate $c, $realm, \%auth_info |
d99b7693 |
452 | |
513d8ab6 |
453 | Tries to authenticate the user, and if that fails calls |
454 | C<authorization_required_response> and detaches the current action call stack. |
d99b7693 |
455 | |
456 | Looks inside C<< $c->request->headers >> and processes the digest and basic |
457 | (badly named) authorization header. |
458 | |
459 | This will only try the methods set in the configuration. First digest, then basic. |
460 | |
bf399285 |
461 | The %auth_info hash can contain a number of keys which control the authentication behaviour: |
462 | |
463 | =over |
464 | |
465 | =item realm |
466 | |
467 | Sets the HTTP authentication realm presented to the client. Note this does not alter the |
468 | Catalyst::Authentication::Realm object used for the authentication. |
469 | |
470 | =item password_type |
471 | |
472 | The type of password returned by the user object. Same useage as in |
473 | L<Catalyst::Authentication::Credential::Password|Catalyst::Authentication::Credential::Password/passwprd_type> |
474 | |
475 | =item password_field |
476 | |
477 | The name of accessor used to retrieve the value of the password field from the user object. Same useage as in |
478 | L<Catalyst::Authentication::Credential::Password|Catalyst::Authentication::Credential::Password/password_field> |
479 | |
480 | =back |
d99b7693 |
481 | |
513d8ab6 |
482 | =item authenticate_basic $c, $realm, \%auth_info |
d99b7693 |
483 | |
bf399285 |
484 | Performs HTTP basic authentication. |
490754a8 |
485 | |
513d8ab6 |
486 | =item authenticate_digest $c, $realm, \%auth_info |
d99b7693 |
487 | |
bf399285 |
488 | Performs HTTP digest authentication. Note that the password_type B<must> by I<clear> for |
489 | digest authentication to succeed. |
d99b7693 |
490 | |
513d8ab6 |
491 | =item authorization_required_response $c, $realm, \%auth_info |
d99b7693 |
492 | |
493 | Sets C<< $c->response >> to the correct status code, and adds the correct |
494 | header to demand authentication data from the user agent. |
495 | |
513d8ab6 |
496 | Typically used by C<authenticate>, but may be invoked manually. |
d99b7693 |
497 | |
513d8ab6 |
498 | %opts can contain C<domain> and C<algorithm>, which are used to build |
d99b7693 |
499 | %the digest header. |
500 | |
513d8ab6 |
501 | =item store_digest_authorization_nonce $c, $key, $nonce |
d99b7693 |
502 | |
513d8ab6 |
503 | =item get_digest_authorization_nonce $c, $key |
d99b7693 |
504 | |
505 | Set or get the C<$nonce> object used by the digest auth mode. |
506 | |
507 | You may override these methods. By default they will call C<get> and C<set> on |
508 | C<< $c->cache >>. |
509 | |
d99b7693 |
510 | =back |
511 | |
512 | =head1 CONFIGURATION |
513 | |
513d8ab6 |
514 | All configuration is stored in C<< YourApp->config(authentication => { yourrealm => { credential => { class => 'HTTP', %config } } } >>. |
d99b7693 |
515 | |
516 | This should be a hash, and it can contain the following entries: |
517 | |
518 | =over 4 |
519 | |
d99b7693 |
520 | =item type |
521 | |
522 | Can be either C<any> (the default), C<basic> or C<digest>. |
523 | |
513d8ab6 |
524 | This controls C<authorization_required_response> and C<authenticate>, but |
d99b7693 |
525 | not the "manual" methods. |
526 | |
527 | =item authorization_required_message |
528 | |
513d8ab6 |
529 | Set this to a string to override the default body content "Authorization required.", or set to undef to suppress body content being generated. |
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530 | |
531 | =back |
532 | |
533 | =head1 RESTRICTIONS |
534 | |
535 | When using digest authentication, this module will only work together |
536 | with authentication stores whose User objects have a C<password> |
537 | method that returns the plain-text password. It will not work together |
538 | with L<Catalyst::Authentication::Store::Htpasswd>, or |
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539 | L<Catalyst::Authentication::Store::DBIC> stores whose |
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540 | C<password> methods return a hashed or salted version of the password. |
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541 | |
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542 | =head1 AUTHORS |
543 | |
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544 | Updated to current name space and currently maintained |
545 | by: Tomas Doran C<bobtfish@bobtfish.net>. |
546 | |
547 | Original module by: |
548 | |
549 | =over |
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550 | |
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551 | =item Yuval Kogman, C<nothingmuch@woobling.org> |
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552 | |
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553 | =item Jess Robinson |
554 | |
555 | =item Sascha Kiefer C<esskar@cpan.org> |
556 | |
557 | =back |
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558 | |
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559 | =head1 SEE ALSO |
560 | |
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561 | RFC 2617 (or its successors), L<Catalyst::Plugin::Cache>, L<Catalyst::Plugin::Authentication> |
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562 | |
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563 | =head1 COPYRIGHT & LICENSE |
564 | |
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565 | Copyright (c) 2005-2008 the aforementioned authors. All rights |
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566 | reserved. This program is free software; you can redistribute |
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567 | it and/or modify it under the same terms as Perl itself. |
568 | |
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569 | =cut |
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570 | |