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package Apache2::Authen::OdinAuth; |
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use 5.006; |
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use strict; |
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use warnings; |
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=head1 NAME |
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Apache2::Authen::OdinAuth - A cookie-based single sign-on module for Apache. |
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=head1 VERSION |
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Version 0.8 |
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=cut |
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our $VERSION = 0.8; |
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use Crypt::OdinAuth; |
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use Apache2::Log; |
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use Apache2::RequestRec (); |
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use Apache2::RequestUtil; |
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use Apache2::ServerUtil (); |
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use Apache2::URI (); |
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use Apache2::Connection; |
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use Apache2::Const -compile => qw(OK REDIRECT REMOTE_NOLOOKUP FORBIDDEN); |
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use APR::Table; |
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use YAML::XS; |
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use Sys::Hostname; |
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=head1 SYNOPSIS |
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This module defines an Apache handler for the Odin Authenticator |
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single sign-on system. The system is based on the GodAuth script, |
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available at L. |
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=head1 USAGE |
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To make Apache use the handler for authentication, enable mod_perl and |
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add following directives in apache2.conf: |
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PerlSetVar odinauth_config /path/to/odin_auth.yml |
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PerlFixupHandler Apache2::Authen::OdinAuth |
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The C statement needs to be global; the |
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C statement can be global or occur in a |
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C, C, or C section. |
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=head2 YAML CONFIG |
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The handler reads (and automatically reloads if it's older than |
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C seconds) an additional YAML config file. It sets |
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configures the shared secret, cookie name, authorizer app URL, and |
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permissions (which are unfortunately regexp-based). |
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58
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A sample configuration file looks like this: |
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# Sample config for Apache2::Authen::OdinAuth |
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permissions: |
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# URLs no auth |
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- url: !!perl/regexp ^localhost |
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who: all |
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# Require a role |
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- url: !!perl/regexp ^dev\.myapp\.com |
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who: role:admin |
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# Require username |
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- url: !!perl/regexp ^debug\.myapp\.com/ |
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who: cal |
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# A list is fine too |
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- url: !!perl/regexp ^debug2\.myapp\.com/ |
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who: |
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- role:devel |
76
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- cal |
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- myles |
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# Allow any authenticated user |
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- url: !!perl/regexp ^debug3\.myapp\.com/ |
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who: authed |
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# log_file: /tmp/odin.log |
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secret: **************** |
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reload_timeout: 600 |
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need_auth_url: http://example.com/?NA |
87
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invalid_cookie_url: http://example.com/?CIU |
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not_on_list_url: http://example.com/?NOL |
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cookie: oa |
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NOTE: The config is better than original GodAuth configuration, but |
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will probably need to be refactored; it would be best to make it live |
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inside Apache's configuration. I'm still not sure how to make it |
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happen in mod_perl. |
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96
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=cut |
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98
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use constant RELOAD_TIMEOUT => 10*60; # reload config every 10 minutes |
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100
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=head1 SUBROUTINES |
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102
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=head2 Configuration closure |
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104
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=cut |
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{ |
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my $last_reload_time = -1; |
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my $config_file = undef; |
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my $config = undef; |
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110
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=head3 config |
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112
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Reloads configuration if older than RELOAD_TIMEOUT |
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114
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=cut |
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sub config { |
116
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if ( time() - $last_reload_time > RELOAD_TIMEOUT ) { |
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$config = YAML::XS::LoadFile($config_file); |
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} |
119
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$config; |
120
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} |
121
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122
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=head3 init_config(request) |
123
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124
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Finds config file and loads it for the first time |
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126
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=cut |
127
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sub init_config { |
128
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my $r = shift; |
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$config_file ||= |
130
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$r->server->dir_config('odinauth_config'); |
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config; |
132
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} |
133
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} |
134
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135
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$| = 1; |
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137
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=head2 handler(request) |
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139
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Main Apache mod_perl handler |
140
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141
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=cut |
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sub handler { |
143
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# |
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# get URL |
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# |
146
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147
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my $r = shift; |
148
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149
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my $domain = $r->headers_in->{'Host'} || 'UNKNOWN-HOST'; |
150
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my $path = $r->unparsed_uri; |
151
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152
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my $host = hostname; |
153
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154
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$ENV{OdinAuth_User} = ''; |
155
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156
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my $url = $domain . $path; |
157
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my $log = "OdinAuth :: $url"; |
158
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159
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init_config($r); |
160
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161
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162
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######################################################### |
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# |
164
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# 1) check we have a cookie secret |
165
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# |
166
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config->{'secret'} ||= 'nottherightsecret'; |
167
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168
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169
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######################################################### |
170
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# |
171
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# 1) determine if we need to perform access control for this url |
172
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# |
173
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174
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my $allow = 'none'; |
175
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176
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for my $obj (@{config->{'permissions'}}) { |
177
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if ($url =~ $obj->{url}) { |
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$allow = $obj->{who}; |
179
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last; |
180
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} |
181
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} |
182
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183
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$log .= " allow:$allow"; |
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185
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186
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######################################################### |
187
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# |
188
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# 2) we might need auth - see if we have a valid cookie |
189
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# |
190
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191
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my $cookie_is_invalid = 'by default'; |
192
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my $cookie_user = '?'; |
193
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my $cookie_roles = '_'; |
194
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195
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my $cookies = &parse_cookie_jar($r->headers_in->{'Cookie'}); |
196
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my $cookie = $cookies->{config->{cookie}}; |
197
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198
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if ($cookie) { |
199
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my ( $user, $roles ); |
200
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eval { |
201
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( $user, $roles ) = |
202
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Crypt::OdinAuth::check_cookie( |
203
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config->{secret}, |
204
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$cookie, |
205
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$r->headers_in->{'User-Agent'}); |
206
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}; |
207
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208
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if ( $@ ) { |
209
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$cookie_user = $user; |
210
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$cookie_roles = $roles; |
211
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chomp ( $cookie_is_invalid = $@ ); |
212
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$log .= "(invalid cookie: $cookie_is_invalid)"; |
213
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} else { |
214
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$cookie_is_invalid = undef; |
215
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$cookie_user = $user; |
216
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$cookie_roles = $roles; |
217
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218
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$r->headers_in->set('OdinAuth-User', $cookie_user); |
219
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$r->headers_in->set('OdinAuth-Roles', $cookie_roles); |
220
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221
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$ENV{OdinAuth_User} = $cookie_user; |
222
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$ENV{OdinAuth_Roles} = $cookie_roles; |
223
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224
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$r->notes->add("OdinAuth_User" => $cookie_user); |
225
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$r->notes->add("OdinAuth_Roles" => $cookie_roles); |
226
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227
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$log .= " (valid cookie: $cookie_user $cookie_roles)"; |
228
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} |
229
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} else { |
230
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$log .= " (no cookie)"; |
231
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} |
232
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233
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$r->log->debug($log); |
234
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235
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if ( $cookie_is_invalid ) { |
236
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$r->log->warn("Invalid cookie for $cookie_user($cookie_roles): $cookie_is_invalid"); |
237
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} |
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######################################################### |
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# |
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# 3) exit now if we got an 'all' |
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# |
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if (ref $allow ne 'ARRAY') { |
245
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if ($allow eq 'all') { |
246
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return Apache2::Const::OK; |
247
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} |
248
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} |
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250
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######################################################### |
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# |
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# 4) if we don't have a valid cookie, redirect to the auther |
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# |
255
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256
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if (!$cookie) { |
257
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return &redir($r, config->{need_auth_url}); |
258
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} |
259
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260
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if ($cookie_is_invalid) { |
261
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return &redir($r, config->{invalid_cookie_url}, $cookie_is_invalid); |
262
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} |
263
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264
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265
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######################################################### |
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# |
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# 5) set user; exit now for authed |
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# |
269
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270
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$r->user($cookie_user); |
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$r->subprocess_env('REMOTE_USER' => $cookie_user); |
272
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$r->set_basic_credentials($cookie_user, '*****'); |
273
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274
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if (ref $allow ne 'ARRAY') { |
275
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if ($allow eq 'authed') { |
276
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return Apache2::Const::OK; |
277
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} |
278
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} |
279
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280
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281
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######################################################### |
282
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# |
283
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# 5) now we need to match usernames and/or roles |
284
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# |
285
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286
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# get arrayref of allowed roles |
287
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unless (ref $allow eq 'ARRAY'){ |
288
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$allow = [$allow]; |
289
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} |
290
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291
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# get arrayref of our roles |
292
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my $matches = [$cookie_user]; |
293
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for my $role (split /,/, $cookie_roles) { |
294
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if ($role ne '_') { |
295
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|
push @{$matches}, 'role:'.$role; |
296
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} |
297
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} |
298
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299
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300
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for my $a (@{$allow}) { |
301
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for my $b (@{$matches}) { |
302
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303
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|
if ($a eq $b) { |
304
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|
|
return Apache2::Const::OK; |
305
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|
} |
306
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|
} |
307
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} |
308
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309
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310
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|
# |
311
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|
|
# send the user to the not-on-list page |
312
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|
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|
# |
313
|
|
|
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|
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314
|
|
|
|
|
|
|
return &redir($r, config->{not_on_list_url}); |
315
|
|
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|
|
|
|
} |
316
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
=head2 redir(request, target, reason) |
318
|
|
|
|
|
|
|
|
319
|
|
|
|
|
|
|
Redirect to Authorizer App |
320
|
|
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|
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|
|
|
321
|
|
|
|
|
|
|
=cut |
322
|
|
|
|
|
|
|
sub redir { |
323
|
|
|
|
|
|
|
my ($r, $target, $reason) = @_; |
324
|
|
|
|
|
|
|
my $ref = &urlencode($r->construct_url($r->unparsed_uri)); |
325
|
|
|
|
|
|
|
$target .= ($target =~ /\?/) ? "&ref=$ref" : "?ref=$ref"; |
326
|
|
|
|
|
|
|
$target .= '&reason='.urlencode($reason) if $reason; |
327
|
|
|
|
|
|
|
|
328
|
|
|
|
|
|
|
$r->headers_out->set('Location', $target); |
329
|
|
|
|
|
|
|
return Apache2::Const::REDIRECT; |
330
|
|
|
|
|
|
|
} |
331
|
|
|
|
|
|
|
|
332
|
|
|
|
|
|
|
=head2 parse_cookie_jar(jar) |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
Parse cookies into a hashref |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
=cut |
337
|
|
|
|
|
|
|
sub parse_cookie_jar { |
338
|
|
|
|
|
|
|
my ($jar) = @_; |
339
|
|
|
|
|
|
|
|
340
|
|
|
|
|
|
|
return {} unless defined $jar; |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
my @bits = split /;\s*/, $jar; |
343
|
|
|
|
|
|
|
my $out = {}; |
344
|
|
|
|
|
|
|
for my $bit (@bits) { |
345
|
|
|
|
|
|
|
my ($k, $v) = split '=', $bit, 2; |
346
|
|
|
|
|
|
|
$k = &urldecode($k); |
347
|
|
|
|
|
|
|
$v = &urldecode($v); |
348
|
|
|
|
|
|
|
$out->{$k} = $v; |
349
|
|
|
|
|
|
|
} |
350
|
|
|
|
|
|
|
return $out; |
351
|
|
|
|
|
|
|
} |
352
|
|
|
|
|
|
|
|
353
|
|
|
|
|
|
|
=head2 urldecode(str) |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
=cut |
356
|
|
|
|
|
|
|
sub urldecode { |
357
|
|
|
|
|
|
|
$_[0] =~ s!\+! !g; |
358
|
|
|
|
|
|
|
$_[0] =~ s/%([a-fA-F0-9]{2,2})/chr(hex($1))/eg; |
359
|
|
|
|
|
|
|
return $_[0]; |
360
|
|
|
|
|
|
|
} |
361
|
|
|
|
|
|
|
|
362
|
|
|
|
|
|
|
=head2 urlencode(str) |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
=cut |
365
|
|
|
|
|
|
|
sub urlencode { |
366
|
|
|
|
|
|
|
$_[0] =~ s!([^a-zA-Z0-9-_ ])! sprintf('%%%02x', ord $1) !gex; |
367
|
|
|
|
|
|
|
$_[0] =~ s! !+!g; |
368
|
|
|
|
|
|
|
return $_[0]; |
369
|
|
|
|
|
|
|
} |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
=head1 AUTHOR |
373
|
|
|
|
|
|
|
|
374
|
|
|
|
|
|
|
Maciej Pasternacki, C<< >> |
375
|
|
|
|
|
|
|
|
376
|
|
|
|
|
|
|
=head1 BUGS |
377
|
|
|
|
|
|
|
|
378
|
|
|
|
|
|
|
Please report any bugs or feature requests to C, or through |
379
|
|
|
|
|
|
|
the web interface at L. I will be notified, and then you'll |
380
|
|
|
|
|
|
|
automatically be notified of progress on your bug as I make changes. |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
|
384
|
|
|
|
|
|
|
|
385
|
|
|
|
|
|
|
=head1 SUPPORT |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
You can find documentation for this module with the perldoc command. |
388
|
|
|
|
|
|
|
|
389
|
|
|
|
|
|
|
perldoc Apache2::Authen::OdinAuth |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
|
392
|
|
|
|
|
|
|
You can also look for information at: |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
=over 4 |
395
|
|
|
|
|
|
|
|
396
|
|
|
|
|
|
|
=item * RT: CPAN's request tracker (report bugs here) |
397
|
|
|
|
|
|
|
|
398
|
|
|
|
|
|
|
L |
399
|
|
|
|
|
|
|
|
400
|
|
|
|
|
|
|
=item * AnnoCPAN: Annotated CPAN documentation |
401
|
|
|
|
|
|
|
|
402
|
|
|
|
|
|
|
L |
403
|
|
|
|
|
|
|
|
404
|
|
|
|
|
|
|
=item * CPAN Ratings |
405
|
|
|
|
|
|
|
|
406
|
|
|
|
|
|
|
L |
407
|
|
|
|
|
|
|
|
408
|
|
|
|
|
|
|
=item * Search CPAN |
409
|
|
|
|
|
|
|
|
410
|
|
|
|
|
|
|
L |
411
|
|
|
|
|
|
|
|
412
|
|
|
|
|
|
|
=back |
413
|
|
|
|
|
|
|
|
414
|
|
|
|
|
|
|
|
415
|
|
|
|
|
|
|
=head1 ACKNOWLEDGEMENTS |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
|
418
|
|
|
|
|
|
|
=head1 LICENSE AND COPYRIGHT |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
Copyright 2012 Maciej Pasternacki. |
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
This program is free software; you can redistribute it and/or modify it |
423
|
|
|
|
|
|
|
under the terms of either: the GNU General Public License as published |
424
|
|
|
|
|
|
|
by the Free Software Foundation; or the Artistic License. |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
See http://dev.perl.org/licenses/ for more information. |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
|
429
|
|
|
|
|
|
|
=cut |
430
|
|
|
|
|
|
|
|
431
|
|
|
|
|
|
|
1; # End of Apache2::Authen::OdinAuth |