providers/saml: fix signatures being required

passbook/providers/saml/migrations/0008_auto_20201111_2135.py

@@ -0,0 +1,25 @@
+# Generated by Django 3.1.3 on 2020-11-11 21:35
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('passbook_crypto', '0002_create_self_signed_kp'),
+        ('passbook_providers_saml', '0007_samlprovider_verification_kp'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='samlprovider',
+            name='signing_kp',
+            field=models.ForeignKey(blank=True, default=None, help_text='Singing is enabled upon selection of a Key Pair.', null=True, on_delete=django.db.models.deletion.SET_NULL, to='passbook_crypto.certificatekeypair', verbose_name='Signing Keypair'),
+        ),
+        migrations.AlterField(
+            model_name='samlprovider',
+            name='verification_kp',
+            field=models.ForeignKey(blank=True, default=None, help_text="If selected, incoming assertion's Signatures will be validated.", null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='+', to='passbook_crypto.certificatekeypair', verbose_name='Verification Keypair'),
+        ),
+    ]

passbook/providers/saml/models.py

@@ -91,6 +91,7 @@ class SAMLProvider(Provider):
         CertificateKeyPair,
         default=None,
         null=True,
+        blank=True,
         help_text=_("If selected, incoming assertion's Signatures will be validated."),
         on_delete=models.SET_NULL,
         verbose_name=_("Verification Keypair"),
@@ -100,6 +101,7 @@ class SAMLProvider(Provider):
         CertificateKeyPair,
         default=None,
         null=True,
+        blank=True,
         help_text=_("Singing is enabled upon selection of a Key Pair."),
         on_delete=models.SET_NULL,
         verbose_name=_("Signing Keypair"),