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1 | package Catalyst::Plugin::Authentication::Credential::Password; |
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2 | use base qw/Class::Accessor::Fast/; |
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3 | |
4 | use strict; |
5 | use warnings; |
6 | |
7 | use Scalar::Util (); |
8 | use Catalyst::Exception (); |
9 | use Digest (); |
10 | |
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11 | BEGIN { |
12 | __PACKAGE__->mk_accessors(qw/_config/); |
13 | } |
14 | |
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15 | sub new { |
16 | my ($class, $config, $app) = @_; |
17 | |
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18 | my $self = { _config => $config }; |
19 | bless $self, $class; |
20 | |
21 | $self->_config->{'password_field'} ||= 'password'; |
22 | $self->_config->{'password_type'} ||= 'clear'; |
23 | $self->_config->{'password_hash_type'} ||= 'SHA-1'; |
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24 | |
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25 | my $passwordtype = $self->_config->{'password_type'}; |
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26 | if (!grep /$passwordtype/, ('none', 'clear', 'hashed', 'salted_hash', 'crypted', 'self_check')) { |
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27 | Catalyst::Exception->throw(__PACKAGE__ . " used with unsupported password type: " . $self->_config->{'password_type'}); |
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28 | } |
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29 | return $self; |
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30 | } |
31 | |
32 | sub authenticate { |
33 | my ( $self, $c, $authstore, $authinfo ) = @_; |
34 | |
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35 | ## because passwords may be in a hashed format, we have to make sure that we remove the |
36 | ## password_field before we pass it to the user routine, as some auth modules use |
37 | ## all data passed to them to find a matching user... |
38 | my $userfindauthinfo = {%{$authinfo}}; |
39 | delete($userfindauthinfo->{$self->_config->{'password_field'}}); |
40 | |
41 | my $user_obj = $authstore->find_user($userfindauthinfo, $c); |
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42 | if (ref($user_obj)) { |
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43 | if ($self->check_password($user_obj, $authinfo)) { |
44 | return $user_obj; |
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45 | } |
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46 | } else { |
47 | $c->log->debug("Unable to locate user matching user info provided"); |
48 | return; |
49 | } |
50 | } |
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51 | |
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52 | sub check_password { |
53 | my ( $self, $user, $authinfo ) = @_; |
54 | |
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55 | if ($self->_config->{'password_type'} eq 'self_check') { |
56 | return $user->check_password($authinfo->{$self->_config->{'password_field'}}); |
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57 | } else { |
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58 | my $password = $authinfo->{$self->_config->{'password_field'}}; |
59 | my $storedpassword = $user->get($self->_config->{'password_field'}); |
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60 | |
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61 | if ($self->_config->{'password_type'} eq 'none') { |
62 | return 1; |
63 | } elsif ($self->_config->{'password_type'} eq 'clear') { |
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64 | return $password eq $storedpassword; |
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65 | } elsif ($self->_config->{'password_type'} eq 'crypted') { |
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66 | return $storedpassword eq crypt( $password, $storedpassword ); |
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67 | } elsif ($self->_config->{'password_type'} eq 'salted_hash') { |
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68 | require Crypt::SaltedHash; |
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69 | my $salt_len = $self->_config->{'password_salt_len'} ? $self->_config->{'password_salt_len'} : 0; |
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70 | return Crypt::SaltedHash->validate( $storedpassword, $password, |
71 | $salt_len ); |
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72 | } elsif ($self->_config->{'password_type'} eq 'hashed') { |
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73 | |
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74 | my $d = Digest->new( $self->_config->{'password_hash_type'} ); |
75 | $d->add( $self->_config->{'password_pre_salt'} || '' ); |
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76 | $d->add($password); |
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77 | $d->add( $self->_config->{'password_post_salt'} || '' ); |
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78 | |
79 | my $computed = $d->clone()->digest; |
80 | my $b64computed = $d->clone()->b64digest; |
81 | return ( ( $computed eq $storedpassword ) |
82 | || ( unpack( "H*", $computed ) eq $storedpassword ) |
83 | || ( $b64computed eq $storedpassword) |
84 | || ( $b64computed.'=' eq $storedpassword) ); |
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85 | } |
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86 | } |
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87 | } |
88 | |
89 | ## BACKWARDS COMPATIBILITY - all subs below here are deprecated |
90 | ## They are here for compatibility with older modules that use / inherit from C::P::A::Password |
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91 | ## login()'s existance relies rather heavily on the fact that only Credential::Password |
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92 | ## is being used as a credential. This may not be the case. This is only here |
93 | ## for backward compatibility. It will go away in a future version |
94 | ## login should not be used in new applications. |
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95 | |
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96 | sub login { |
97 | my ( $c, $user, $password, @rest ) = @_; |
98 | |
99 | unless ( |
100 | defined($user) |
101 | or |
102 | $user = $c->request->param("login") |
103 | || $c->request->param("user") |
104 | || $c->request->param("username") |
105 | ) { |
106 | $c->log->debug( |
107 | "Can't login a user without a user object or user ID param") |
108 | if $c->debug; |
109 | return; |
110 | } |
111 | |
112 | unless ( |
113 | defined($password) |
114 | or |
115 | $password = $c->request->param("password") |
116 | || $c->request->param("passwd") |
117 | || $c->request->param("pass") |
118 | ) { |
119 | $c->log->debug("Can't login a user without a password") |
120 | if $c->debug; |
121 | return; |
122 | } |
123 | |
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124 | unless ( Scalar::Util::blessed($user) |
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125 | and $user->isa("Catalyst::Plugin::Authentication::User") ) |
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126 | { |
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127 | if ( my $user_obj = $c->get_user( $user, $password, @rest ) ) { |
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128 | $user = $user_obj; |
129 | } |
130 | else { |
131 | $c->log->debug("User '$user' doesn't exist in the default store") |
132 | if $c->debug; |
133 | return; |
134 | } |
135 | } |
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136 | |
137 | if ( $c->_check_password( $user, $password ) ) { |
138 | $c->set_authenticated($user); |
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139 | $c->log->debug("Successfully authenticated user '$user'.") |
140 | if $c->debug; |
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141 | return 1; |
142 | } |
143 | else { |
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144 | $c->log->debug( |
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145 | "Failed to authenticate user '$user'. Reason: 'Incorrect password'") |
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146 | if $c->debug; |
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147 | return; |
148 | } |
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149 | |
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150 | } |
151 | |
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152 | ## also deprecated. Here for compatibility with older credentials which do not inherit from C::P::A::Password |
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153 | sub _check_password { |
154 | my ( $c, $user, $password ) = @_; |
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155 | |
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156 | if ( $user->supports(qw/password clear/) ) { |
157 | return $user->password eq $password; |
158 | } |
159 | elsif ( $user->supports(qw/password crypted/) ) { |
160 | my $crypted = $user->crypted_password; |
161 | return $crypted eq crypt( $password, $crypted ); |
162 | } |
163 | elsif ( $user->supports(qw/password hashed/) ) { |
164 | |
165 | my $d = Digest->new( $user->hash_algorithm ); |
166 | $d->add( $user->password_pre_salt || '' ); |
167 | $d->add($password); |
168 | $d->add( $user->password_post_salt || '' ); |
169 | |
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170 | my $stored = $user->hashed_password; |
171 | my $computed = $d->clone()->digest; |
172 | my $b64computed = $d->clone()->b64digest; |
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173 | |
174 | return ( ( $computed eq $stored ) |
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175 | || ( unpack( "H*", $computed ) eq $stored ) |
176 | || ( $b64computed eq $stored) |
177 | || ( $b64computed.'=' eq $stored) ); |
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178 | } |
179 | elsif ( $user->supports(qw/password salted_hash/) ) { |
180 | require Crypt::SaltedHash; |
181 | |
182 | my $salt_len = |
183 | $user->can("password_salt_len") ? $user->password_salt_len : 0; |
184 | |
185 | return Crypt::SaltedHash->validate( $user->hashed_password, $password, |
186 | $salt_len ); |
187 | } |
188 | elsif ( $user->supports(qw/password self_check/) ) { |
189 | |
190 | # while somewhat silly, this is to prevent code duplication |
191 | return $user->check_password($password); |
192 | |
193 | } |
194 | else { |
195 | Catalyst::Exception->throw( |
196 | "The user object $user does not support any " |
197 | . "known password authentication mechanism." ); |
198 | } |
199 | } |
200 | |
201 | __PACKAGE__; |
202 | |
203 | __END__ |
204 | |
205 | =pod |
206 | |
207 | =head1 NAME |
208 | |
209 | Catalyst::Plugin::Authentication::Credential::Password - Authenticate a user |
210 | with a password. |
211 | |
212 | =head1 SYNOPSIS |
213 | |
214 | use Catalyst qw/ |
215 | Authentication |
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216 | /; |
217 | |
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218 | package MyApp::Controller::Auth; |
219 | |
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220 | sub login : Local { |
221 | my ( $self, $c ) = @_; |
222 | |
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223 | $c->authenticate( { username => $c->req->param('username'), |
224 | password => $c->req->param('password') }); |
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225 | } |
226 | |
227 | =head1 DESCRIPTION |
228 | |
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229 | This authentication credential checker takes authentication information |
230 | (most often a username) and a password, and attempts to validate the password |
231 | provided against the user retrieved from the store. |
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232 | |
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233 | =head1 CONFIGURATION |
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234 | |
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235 | # example |
236 | __PACKAGE__->config->{authentication} = |
237 | { |
238 | default_realm => 'members', |
239 | realms => { |
240 | members => { |
241 | |
242 | credential => { |
243 | class => 'Password', |
244 | password_field => 'password', |
245 | password_type => 'hashed', |
246 | password_hash_type => 'SHA-1' |
247 | }, |
248 | ... |
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249 | |
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250 | |
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251 | The password module is capable of working with several different password |
252 | encryption/hashing algorithms. The one the module uses is determined by the |
253 | credential configuration. |
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254 | |
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255 | Those who have used L<Catalyst::Plugin::Authentication> prior to the 0.10 release |
256 | should note that the password field and type information is no longer part |
257 | of the store configuration and is now part of the Password credential configuration. |
258 | |
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259 | =over 4 |
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260 | |
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261 | =item class |
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262 | |
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263 | The classname used for Credential. This is part of |
264 | L<Catalyst::Plugin::Authentication> and is the method by which |
265 | Catalyst::Plugin::Authentication::Credential::Password is loaded as the |
266 | credential validator. For this module to be used, this must be set to |
267 | 'Password'. |
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268 | |
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269 | =item password_field |
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270 | |
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271 | The field in the user object that contains the password. This will vary |
272 | depending on the storage class used, but is most likely something like |
273 | 'password'. In fact, this is so common that if this is left out of the config, |
274 | it defaults to 'password'. This field is obtained from the user object using |
275 | the get() method. Essentially: $user->get('passwordfieldname'); |
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276 | |
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277 | =item password_type |
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278 | |
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279 | This sets the password type. Often passwords are stored in crypted or hashed |
280 | formats. In order for the password module to verify the plaintext password |
281 | passed in, it must be told what format the password will be in when it is retreived |
282 | from the user object. The supported options are: |
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283 | |
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284 | =over 8 |
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285 | |
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286 | =item none |
287 | |
288 | No password check is done. An attempt is made to retrieve the user based on |
289 | the information provided in the $c->authenticate() call. If a user is found, |
290 | authentication is considered to be successful. |
291 | |
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292 | =item clear |
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293 | |
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294 | The password in user is in clear text and will be compared directly. |
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295 | |
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296 | =item self_check |
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297 | |
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298 | This option indicates that the password should be passed to the check_password() |
299 | routine on the user object returned from the store. |
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300 | |
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301 | =item crypted |
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302 | |
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303 | The password in user is in UNIX crypt hashed format. |
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304 | |
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305 | =item salted_hash |
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306 | |
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307 | The password in user is in salted hash format, and will be validated |
308 | using L<Crypt::SaltedHash>. If this password type is selected, you should |
309 | also provide the B<password_salt_len> config element to define the salt length. |
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310 | |
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311 | =item hashed |
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312 | |
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313 | If the user object supports hashed passwords, they will be used in conjunction |
314 | with L<Digest>. The following config elements affect the hashed configuration: |
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315 | |
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316 | =over 8 |
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317 | |
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318 | =item password_hash_type |
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319 | |
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320 | The hash type used, passed directly to L<Digest/new>. |
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321 | |
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322 | =item password_pre_salt |
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323 | |
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324 | Any pre-salt data to be passed to L<Digest/add> before processing the password. |
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325 | |
326 | =item password_post_salt |
327 | |
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328 | Any post-salt data to be passed to L<Digest/add> after processing the password. |
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329 | |
330 | =back |
331 | |
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332 | =back |
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333 | |
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334 | =back |
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335 | |
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336 | =head1 USAGE |
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337 | |
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338 | The Password credential module is very simple to use. Once configured as |
339 | indicated above, authenticating using this module is simply a matter of |
340 | calling $c->authenticate() with an authinfo hashref that includes the |
341 | B<password> element. The password element should contain the password supplied |
342 | by the user to be authenticated, in clear text. The other information supplied |
343 | in the auth hash is ignored by the Password module, and simply passed to the |
344 | auth store to be used to retrieve the user. An example call follows: |
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345 | |
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346 | if ($c->authenticate({ username => $username, |
347 | password => $password} )) { |
348 | # authentication successful |
349 | } else { |
350 | # authentication failed |
351 | } |
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352 | |
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353 | =head1 METHODS |
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354 | |
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355 | There are no publicly exported routines in the Password module (or indeed in |
356 | most credential modules.) However, below is a description of the routines |
357 | required by L<Catalyst::Plugin::Authentication> for all credential modules. |
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358 | |
359 | =over 4 |
360 | |
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361 | =item new ( $config, $app ) |
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362 | |
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363 | Instantiate a new Password object using the configuration hash provided in |
364 | $config. A reference to the application is provided as the second argument. |
365 | Note to credential module authors: new() is called during the application's |
366 | plugin setup phase, which is before the application specific controllers are |
367 | loaded. The practical upshot of this is that things like $c->model(...) will |
368 | not function as expected. |
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369 | |
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370 | =item authenticate ( $authinfo, $c ) |
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371 | |
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372 | Try to log a user in, receives a hashref containing authentication information |
373 | as the first argument, and the current context as the second. |
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374 | |
89505ffb |
375 | =back |