add audience field, switch base processor, better handle processor loading failure

passbook/saml_idp/base.py

@@ -116,11 +116,7 @@ class Processor:
 
     def _determine_audience(self):
         """Determines the _audience."""
-        self._audience = self._request_params.get('DESTINATION', None)
-
-        if not self._audience:
-            self._audience = self._request_params.get('PROVIDER_NAME', None)
-
+        self._audience = self._remote.audience
         self._logger.info('determined audience')
 
     def _determine_response_id(self):

passbook/saml_idp/forms.py

@@ -25,7 +25,7 @@ class SAMLProviderForm(forms.ModelForm):
     class Meta:
 
         model = SAMLProvider
-        fields = ['name', 'property_mappings', 'acs_url', 'processor_path', 'issuer',
+        fields = ['name', 'property_mappings', 'acs_url', 'audience', 'processor_path', 'issuer',
                   'assertion_valid_for', 'signing', 'signing_cert', 'signing_key', ]
         labels = {
             'acs_url': 'ACS URL',
@@ -33,6 +33,7 @@ class SAMLProviderForm(forms.ModelForm):
         }
         widgets = {
             'name': forms.TextInput(),
+            'audience': forms.TextInput(),
             'issuer': forms.TextInput(),
             'property_mappings': FilteredSelectMultiple(_('Property Mappings'), False)
         }

passbook/saml_idp/migrations/0003_samlprovider_audience.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2 on 2019-04-18 09:09
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_saml_idp', '0002_samlpropertymapping'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='samlprovider',
+            name='audience',
+            field=models.TextField(blank=True, default=''),
+        ),
+    ]

passbook/saml_idp/migrations/0004_auto_20190418_0918.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2 on 2019-04-18 09:18
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_saml_idp', '0003_samlprovider_audience'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='samlprovider',
+            name='audience',
+            field=models.TextField(default=''),
+        ),
+    ]

passbook/saml_idp/models.py

@@ -15,6 +15,7 @@ class SAMLProvider(Provider):
 
     name = models.TextField()
     acs_url = models.URLField()
+    audience = models.TextField(default='')
     processor_path = models.CharField(max_length=255, choices=[])
     issuer = models.TextField()
     assertion_valid_for = models.IntegerField(default=86400)
@@ -33,7 +34,10 @@ class SAMLProvider(Provider):
     def processor(self):
         """Return selected processor as instance"""
         if not self._processor:
-            self._processor = path_to_class(self.processor_path)(self)
+            try:
+                self._processor = path_to_class(self.processor_path)(self)
+            except ModuleNotFoundError:
+                self._processor = None
         return self._processor
 
     def __str__(self):