585 lines
17 KiB
Perl
585 lines
17 KiB
Perl
## @file
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# SAML Service Provider - Authentication
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## @class
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# SAML Service Provider - Authentication
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package Lemonldap::NG::Portal::AuthSAML;
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use strict;
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use Lemonldap::NG::Portal::Simple;
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use Lemonldap::NG::Portal::_SAML; #inherits
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use Lemonldap::NG::Common::Conf::SAML::Metadata;
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our $VERSION = '0.1';
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## @apmethod int authInit()
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# Load Lasso and metadata
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# @return Lemonldap::NG::Portal error code
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sub authInit {
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my $self = shift;
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# Load Lasso
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return PE_ERROR unless $self->loadLasso();
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# Activate SOAP
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$self->abort( 'To use SAML, you must activate SOAP (Soap => 1)', 'error' )
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unless ( $self->{Soap} );
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# Check presence of private key in configuration
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unless ( $self->{samlServicePrivateKey} ) {
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$self->lmLog( "SAML private key not found in configuration", 'error' );
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return PE_ERROR;
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}
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# Get metadata from configuration
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$self->lmLog( "Get Metadata for this service", 'debug' );
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my $service_metadata = Lemonldap::NG::Common::Conf::SAML::Metadata->new();
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# Create Lasso server with service metadata
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my $server = $self->createServer(
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$service_metadata->serviceToXML(
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$ENV{DOCUMENT_ROOT} . "/skins/common/saml2-metadata.tpl", $self
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),
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$self->{samlServicePrivateKey},
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);
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unless ($server) {
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$self->lmLog( 'Unable to create Lasso server', 'error' );
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return PE_ERROR;
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}
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$self->lmLog( "Service created", 'debug' );
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# Check presence of at least one identity provider in configuration
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unless ( $self->{samlIDPMetaData}
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and keys %{ $self->{samlIDPMetaData} } )
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{
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$self->lmLog( "No IDP found in configuration", 'error' );
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return PE_ERROR;
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}
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# Load identity provider metadata
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# IDP are listed in $self->{samlIDPMetaData}
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# Each key is the IDP name and value is the metadata key
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# Build IDP list for later use in extractFormInfo
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foreach ( keys %{ $self->{samlIDPMetaData} } ) {
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$self->lmLog( "Get Metadata for IDP $_", 'debug' );
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# Get metadata from configuration
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my $idp_metadata = Lemonldap::NG::Common::Conf::SAML::Metadata->new();
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unless (
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$idp_metadata->initializeFromConfHash(
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$self->{samlIDPMetaData}->{$_}->{metadata}
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)
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)
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{
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$self->lmLog( "Fail to read IDP $_ Metadata from configuration",
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'error' );
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return PE_ERROR;
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}
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# Add this IDP to Lasso::Server
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my $result = $self->addIDP( $server, $idp_metadata->toXML() );
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unless ($result) {
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$self->lmLog( "Fail to use IDP $_ Metadata", 'error' );
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return PE_ERROR;
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}
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# Store IDP entityID and Organization Name
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my $entityID = $idp_metadata->{entityID};
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my $name = $self->getOrganizationName( $server, $entityID )
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|| ucfirst($_);
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$self->{_idpList}->{$_}->{entityID} = $entityID;
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$self->{_idpList}->{$_}->{name} = $name;
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$self->lmLog( "IDP $_ added", 'debug' );
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}
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# Store Lasso::Server object
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$self->{_lassoServer} = $server;
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PE_OK;
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}
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## @apmethod int extractFormInfo()
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# Check authentication statement or create authentication request
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# @return Lemonldap::NG::Portal error code
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sub extractFormInfo {
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my $self = shift;
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my $server = $self->{_lassoServer};
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my $login;
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my $idp;
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my %h;
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# 1. Get URL parameters to know if we are receving an assertion
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my $url = $self->url();
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my $saml_acs_art_url = (
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split(
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/;/,
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$self->{samlSPSSODescriptorAssertionConsumerServiceHTTPArtifact}
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)
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)[3];
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my $saml_acs_post_url = (
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split(
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/;/, $self->{samlSPSSODescriptorAssertionConsumerServiceHTTPPost}
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)
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)[3];
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my $saml_acs_get_url = (
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split(
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/;/,
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$self->{samlSPSSODescriptorAssertionConsumerServiceHTTPRedirect}
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)
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)[3];
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if ( $url =~ /^($saml_acs_art_url|$saml_acs_post_url|$saml_acs_get_url)$/i )
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{
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$self->lmLog( "URL $url detected as an assertion consumer URL",
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'debug' );
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# Create Login object
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$login = $self->createLogin($server);
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# 1.1 HTTP REDIRECT
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if ( $url =~ /^$saml_acs_get_url$/i ) {
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# Response in query string
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my $response = $self->query_string();
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$self->lmLog( "HTTP-REDIRECT: SAML Response $response", 'debug' );
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# Process authentication response
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my $result = $self->processAuthnResponseMsg( $login, $response );
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unless ($result) {
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$self->lmLog(
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"HTTP-REDIRECT: Fail to process authentication response",
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'error' );
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return PE_ERROR;
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}
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$self->lmLog( "HTTP-REDIRECT: authentication response is valid",
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'debug' );
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}
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# 1.2 POST
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# TODO
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# 1.3 ARTEFACT (SOAP)
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# TODO
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# Get SAML response
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my $saml_response = $login->response();
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unless ($saml_response) {
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$self->lmLog( "No SAML response found", 'error' );
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return PE_ERROR;
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}
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# Replay protection if this is a response to a created authn request
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my $assertion_responded = $saml_response->InResponseTo;
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if ($assertion_responded) {
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my $assertion_sessions =
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$self->{globalStorage}->searchOn( $self->{globalStorageOptions},
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"ID", $assertion_responded, );
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if ( my @assertion_keys = keys %$assertion_sessions ) {
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# A session was found
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foreach (@assertion_keys) {
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my $assertion_session = $_;
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# Delete it
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eval {
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tie %h, $self->{globalStorage}, $_,
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$self->{globalStorageOptions};
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};
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if ($@) {
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$self->lmLog(
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"Unable to recover assertion session $assertion_session (assertion ID $assertion_responded)",
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'error'
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);
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return PE_ERROR;
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}
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eval { tied(%h)->delete(); };
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if ($@) {
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$self->lmLog(
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"Unable to delete assertion session $assertion_session (assertion ID $assertion_responded)",
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'error'
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);
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return PE_ERROR;
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}
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$self->lmLog(
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"Assertion session $assertion_session (assertion ID $assertion_responded) was deleted",
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'debug'
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);
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}
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}
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else {
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# Assertion was already consumed or is expired
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# Force authentication replay
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$self->lmLog(
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"Assertion $assertion_responded already used or expired, replay authentication",
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'error'
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);
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delete $self->{urldc};
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$self->{mustRedirect} = 1;
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$self->{error} = $self->_subProcess(qw(autoRedirect));
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return $self->{error};
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}
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}
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else {
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$self->lmLog(
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"Assertion is not a response to a created authentication request, do not control replay",
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'debug'
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);
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}
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# Get SAML assertion
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my $assertion = $self->getAssertion($login);
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unless ($assertion) {
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$self->lmLog( "No assertion found", 'error' );
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return PE_ERROR;
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}
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# Check conditions - time and audience
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unless (
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$self->validateConditions( $assertion, $self->{samlEntityID} ) )
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{
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$self->lmLog( "Time or Audience conditions not validated",
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'error' );
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return PE_ERROR;
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}
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$self->lmLog( "Conditions validated", 'debug' );
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# Check OneTimeUse flag
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# TODO
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# Check ProxyRestriction flag
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# TODO
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# Extract RelayState information
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if ( $self->extractRelayState($login) ) {
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$self->lmLog( "RelayState found in authentication assertion",
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'debug' );
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}
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# Check IDP from RelayState
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my $idp = $self->{_idp};
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if ($idp) {
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$self->lmLog( "IDP $idp found in RelayState", 'debug' );
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}
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else {
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# Try to recover IDP from IDP cookie
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my %cookies = fetch CGI::Cookie;
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my $idp_cookie = $cookies{ $self->{samlIdPResolveCookie} };
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if ($idp_cookie) {
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$idp = $idp_cookie->value;
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$self->{_idp} = $idp;
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$self->lmLog( "IDP $idp found in IDP resolution cookie",
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'debug' );
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}
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else {
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$self->lmLog(
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"IDP was not found in RelayState or in IDP resolution cookie",
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'error'
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);
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return PE_ERROR;
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}
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}
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# Force redirection to portal if no urldc found
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# (avoid displaying the whole SAML URL in user browser URL field)
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$self->{mustRedirect} = 1 unless ( $self->{urldc} );
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# Get NameID
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my $nameid = $login->nameIdentifier;
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# Set user
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my $user = $nameid->content;
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unless ($user) {
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$self->lmLog( "No NameID value found", 'error' );
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return PE_USERNOTFOUND;
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}
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$self->lmLog( "Find NameID: $user", 'debug' );
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$self->{user} = $user;
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# Store Lasso::Login object
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$self->{_lassoLogin} = $login;
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return PE_OK;
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}
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# 2. IDP resolution
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# Get IDP resolution cookie
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my %cookies = fetch CGI::Cookie;
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my $idp_cookie = $cookies{ $self->{samlIdPResolveCookie} };
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if ($idp_cookie) {
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$idp = $idp_cookie->value;
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$self->lmLog( "IDP $idp found in IDP resolution cookie", 'debug' );
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}
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# If no IDP resolve cookie, find another way to get it
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# Case 1: IDP was choosen from portal IDP list
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$idp ||= $self->param("idp");
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# TODO - other case (IP resolution, etc.)
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# Get confirmation flag
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my $confirm_flag = $self->param("confirm");
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# If confirmation is -1, or IDP was not resolve, let the user choose its IDP
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if ( $confirm_flag == -1 or !$idp ) {
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$self->lmLog( "No IDP found, redirecting user to IDP list", 'debug' );
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# IDP list
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my $html = "<h3>"
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. &Lemonldap::NG::Portal::_i18n::msg( PM_SAML_IDPSELECT,
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$ENV{HTTP_ACCEPT_LANGUAGE} )
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. "</h3>\n<table>\n";
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foreach ( keys %{ $self->{_idpList} } ) {
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$html .=
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'<tr><td><input type="radio" name="idp" value="'
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. $_
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. '" /></td><td>'
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. $self->{_idpList}->{$_}->{name}
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. '</td></tr>';
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}
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$html .=
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'<tr><td><input type="checkbox" name="cookie_type" value="1"></td><td>'
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. &Lemonldap::NG::Portal::_i18n::msg( PM_REMEMBERCHOICE,
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$ENV{HTTP_ACCEPT_LANGUAGE} )
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. "</td></tr></table>\n"
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# Script to autoselect first choice
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. '<script>$("[type=radio]:first").attr("checked","checked");</script>';
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$self->info($html);
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# Delete existing IDP resolution cookie
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push @{ $self->{cookie} },
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$self->cookie(
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-name => $self->{samlIdPResolveCookie},
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-value => 0,
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-domain => $self->{domain},
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-path => "/",
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-secure => 0,
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-expires => '-1d',
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);
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return PE_CONFIRM;
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}
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# If IDP is found but not confirmed, let the user confirm it
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if ( $confirm_flag != 1 ) {
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$self->lmLog( "IDP $idp selected, need user confirmation", 'debug' );
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# Choosen IDP
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my $html = '<h3>'
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. &Lemonldap::NG::Portal::_i18n::msg( PM_SAML_IDPCHOOSEN,
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$ENV{HTTP_ACCEPT_LANGUAGE} )
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. "</h3>\n"
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. "<h4>$idp</h4>\n" . "<h5>("
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. $self->{_idpList}->{$idp}->{entityID}
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. ")</h5>\n"
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. "<input type=\"hidden\" name=\"idp\" value=\"$idp\" />\n";
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$self->info($html);
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return PE_CONFIRM;
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}
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# Here confirmation is OK (confirm_flag == 1), store choosen IDP in cookie
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unless ( $idp_cookie and ( $idp eq $idp_cookie->value ) ) {
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$self->lmLog( "Build cookie to remember $idp as IDP choice", 'debug' );
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# User can choose temporary (0) or persistent cookie (1)
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my $cookie_type = $self->param("cookie_type") || "0";
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push @{ $self->{cookie} },
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$self->cookie(
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-name => $self->{samlIdPResolveCookie},
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-value => $idp,
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-domain => $self->{domain},
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-path => "/",
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-secure => $self->{securedCookie},
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-httponly => $self->{httpOnly},
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-expires => $cookie_type ? "+365d" : "",
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);
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}
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# 3. Build authentication request
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$self->{_idp} = $idp;
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my $IDPentityID = $self->{_idpList}->{$idp}->{entityID};
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$login = $self->createAuthnRequest( $server, $IDPentityID );
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unless ($login) {
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$self->lmLog( "Could not create authentication request on $IDPentityID",
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'error' );
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return PE_ERROR;
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}
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$self->lmLog( "Authentication request created", 'debug' );
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# Keep assertion ID in memory to prevent replay
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my $assertion_id = $login->request()->ID;
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eval {
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tie %h, $self->{globalStorage}, undef, $self->{globalStorageOptions};
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};
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if ( $@ or !$assertion_id ) {
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$self->lmLog( "Unable to store assertion ID", 'error' );
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return PE_ERROR;
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}
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$h{type} = 'assertion'; # Session type
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$h{_utime} = time(); # Creation time
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$h{ID} = $assertion_id;
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my $assertion_session_id = $h{_session_id};
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untie %h;
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$self->lmLog(
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"Keep assertion ID $assertion_id in assertion session $assertion_session_id",
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'debug'
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);
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# Redirect user to IDP SSO URL
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# Replace urldc value by SSO URL value and call sub autoRedirect
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# TODO Manage other transport (POST, SOAP, ...)
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my $sso_url = $login->msg_url;
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$self->lmLog( "Redirect user to $sso_url", 'debug' );
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$self->{urldc} = $sso_url;
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$self->{error} = $self->_subProcess(qw(autoRedirect));
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return $self->{error};
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}
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## @apmethod int setAuthSessionInfo()
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# Extract attributes sent in authentication statement
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# @return Lemonldap::NG::Portal error code
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sub setAuthSessionInfo {
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my $self = shift;
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my $server = $self->{_lassoServer};
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my $login = $self->{_lassoLogin};
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my $idp = $self->{_idp};
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# Get SAML assertion
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my $assertion = $self->getAssertion($login);
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unless ($assertion) {
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$self->lmLog( "No assertion found", 'error' );
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return PE_ERROR;
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}
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# Try to get attributes if attribute statement is present in assertion
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my $attr_statement = $assertion->AttributeStatement();
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if ($attr_statement) {
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# Get attributes
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my @attributes = $attr_statement->Attribute();
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# Wanted attributes are defined in IDP configuration
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foreach ( keys %{ $self->{samlIDPMetaData}->{$idp}->{exportedAttr} } ) {
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# Extract fields from exportedAttr value
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my ( $mandatory, $name, $format, $friendly_name ) =
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split( /;/,
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$self->{samlIDPMetaData}->{$idp}->{exportedAttr}->{$_} );
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# Try to get value
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my $value =
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$self->getAttributeValue( $name, $format, $friendly_name,
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\@attributes );
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# Store value in sessionInfo
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$self->{sessionInfo}->{$_} = $value if defined $value;
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}
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}
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# Store other informations in session
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$self->{sessionInfo}->{_user} = $self->{user};
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$self->{sessionInfo}->{_idp} = $idp;
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# TODO adapt _utime with SessionNotOnOrAfter
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PE_OK;
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}
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## @apmethod int authenticate()
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# Accept SSO from IDP
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# @return PE_OK
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sub authenticate {
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my $self = shift;
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my $server = $self->{_lassoServer};
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my $login = $self->{_lassoLogin};
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# Accept SSO
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unless ( $self->acceptSSO($login) ) {
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$self->lmLog( "Error while accepting SSO from IDP", 'error' );
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return PE_ERROR;
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}
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# Dump Lasso objects in session
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$self->{sessionInfo}->{_lassoLoginDump} = $login->dump();
|
|
|
|
# Set authenticationLevel
|
|
$self->{sessionInfo}->{authenticationLevel} = 5;
|
|
|
|
PE_OK;
|
|
}
|
|
|
|
## @apmethod void authLogout()
|
|
# Logout SP
|
|
# @return nothing
|
|
sub authLogout {
|
|
my $self = shift;
|
|
|
|
# TODO
|
|
|
|
return;
|
|
}
|
|
|
|
1;
|
|
__END__
|
|
|
|
=head1 NAME
|
|
|
|
=encoding utf8
|
|
|
|
Lemonldap::NG::Portal::AuthSAML - SAML Authentication backend
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
use Lemonldap::NG::Portal::AuthSAML;
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
Use SAML to authenticate users
|
|
|
|
=head1 SEE ALSO
|
|
|
|
L<Lemonldap::NG::Portal>, L<Lemonldap::NG::Portal::UserDBSAML>, L<Lemonldap::NG::Portal::_SAML>
|
|
|
|
=head1 AUTHOR
|
|
|
|
Xavier Guimard, E<lt>x.guimard@free.frE<gt>, Clement Oudot, E<lt>coudot@linagora.comE<gt>
|
|
|
|
=head1 COPYRIGHT AND LICENSE
|
|
|
|
Copyright (C) 2009 by Xavier Guimard
|
|
|
|
This library is free software; you can redistribute it and/or modify
|
|
it under the same terms as Perl itself, either Perl version 5.10.0 or,
|
|
at your option, any later version of Perl 5 you may have available.
|
|
|
|
=cut
|