add handlers for dynamic registration

pylti1p3/contrib/django/lti1p3_tool_config/dynamic_registration.py

@@ -0,0 +1,101 @@
+from   django.urls import reverse_lazy
+from   django.templatetags.static import static
+import json
+from   .models import LtiTool, LtiToolKey
+from   pylti1p3.dynamic_registration import DynamicRegistration, generate_key_pair
+from   typing import Any, Dict
+
+class DjangoDynamicRegistration(DynamicRegistration):
+
+    initiate_login_url = reverse_lazy('lti:login')
+
+    jwks_url = reverse_lazy('lti:jwks')
+
+    launch_url = reverse_lazy('lti:launch')
+
+    # The path of the tool's logo image, under ``STATIC_ROOT``.
+    logo_file = 'lti/logo.png'  
+
+    def __init__(self, request):
+        super().__init__()
+
+        self.request = request
+
+    def get_issuer_keys(self, issuer_name : str):
+        key_obj, created = LtiToolKey.objects.get_or_create(name=issuer_name)
+        if created:
+            private_key, public_key = generate_key_pair()
+            key_obj.private_key = private_key
+            key_obj.public_key = public_key
+            key_obj.save()
+        return key_obj
+
+    def get_initiate_login_uri(self) -> str:
+        return self.request.build_absolute_uri(str(self.initiate_login_url))
+
+    def get_jwks_uri(self) -> str:
+        return self.request.build_absolute_uri(str(self.jwks_url))
+
+    def get_redirect_uris(self) -> list[str]:
+        return [self.get_target_link_uri()]
+
+    def get_domain(self) -> str:
+        return self.request.get_host()
+
+    def get_target_link_uri(self) -> str:
+        return self.request.build_absolute_uri(self.launch_url)
+
+    def get_logo_uri(self) -> str:
+        return self.request.build_absolute_uri(static(self.logo_file))
+
+    def get_openid_configuration_endpoint(self):
+        return self.request.GET.get('openid_configuration')
+
+    def get_registration_token(self):
+        return self.request.GET.get('registration_token')
+
+    def get_platform_name(self, openid_configuration: Dict[str, Any]) -> str:
+        """
+            Get the name of the platform this tool is registering with.
+        """
+        return openid_configuration.get("https://purl.imsglobal.org/spec/lti-platform-configuration",{}).get("product_family_code",'')
+
+    def complete_registration(self, openid_configuration: Dict[str, Any], openid_registration: Dict[str, Any]):
+        title = self.get_platform_name(openid_configuration)
+
+        tool_key = self.get_issuer_keys(openid_configuration['issuer'])
+
+        tool_spec = "https://purl.imsglobal.org/spec/lti-tool-configuration"
+        deployment_ids = [openid_registration[tool_spec]['deployment_id']]
+
+        platform_config, created = LtiTool.objects.update_or_create(
+            issuer=openid_configuration['issuer'],
+            client_id=openid_registration['client_id'],
+            defaults = {
+                'title': title,
+                'auth_login_url': openid_configuration['authorization_endpoint'],
+                'auth_token_url': openid_configuration['token_endpoint'],
+                'auth_audience': openid_configuration['token_endpoint'],
+                'key_set_url': openid_configuration['jwks_uri'],
+                'tool_key': tool_key,
+                'deployment_ids': json.dumps(deployment_ids),
+            }
+        )
+
+        platform_config.save() # type: ignore
+        return platform_config
+
+    def keys_for_issuer(issuer_name: str) -> LtiToolKey:
+        """
+            Get the public and private keys for a given issuer.
+
+            If they don't exist yet, then create them.
+        """
+        key_obj, created = LtiToolKey.objects.get_or_create(name=issuer_name)
+        if created:
+            key_pair = generate_key_pair()
+            key_obj.private_key = key_pair['private']
+            key_obj.public_key = key_pair['public']
+            key_obj.save()
+        return key_obj
+

pylti1p3/contrib/django/lti1p3_tool_config/migrations/0002_alter_ltitool_id_alter_ltitoolkey_id.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.1.7 on 2023-02-21 08:54
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('lti1p3_tool_config', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='ltitool',
+            name='id',
+            field=models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID'),
+        ),
+        migrations.AlterField(
+            model_name='ltitoolkey',
+            name='id',
+            field=models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID'),
+        ),
+    ]