PDC: regenerate the SAML2 metadata when the keys are updated

Signed-off-by: Aurélien Bompard <aurelien@bompard.org>

roles/pdc/frontend/files/create-metadata.sh

@@ -0,0 +1,105 @@
+#!/usr/bin/env bash
+
+#
+# Like /usr/libexec/mod_auth_mellon/mellon_create_metadata.sh, but don't create the certificate and the key.
+# Author: abompard@fedoraproject.org
+#
+
+set -e
+
+PROG="$(basename "$0")"
+
+printUsage() {
+    echo "Usage: $PROG ENTITY-ID ENDPOINT-URL"
+    echo ""
+    echo "Example:"
+    echo "  $PROG urn:someservice https://sp.example.org/mellon"
+    echo ""
+}
+
+if [ "$#" -lt 2 ]; then
+    printUsage
+    exit 1
+fi
+
+ENTITYID="$1"
+if [ -z "$ENTITYID" ]; then
+    echo "$PROG: An entity ID is required." >&2
+    exit 1
+fi
+
+BASEURL="$2"
+if [ -z "$BASEURL" ]; then
+    echo "$PROG: The URL to the MellonEndpointPath is required." >&2
+    exit 1
+fi
+
+if ! echo "$BASEURL" | grep -q '^https\?://'; then
+    echo "$PROG: The URL must start with \"http://\" or \"https://\"." >&2
+    exit 1
+fi
+
+DATADIR=`dirname $0`
+
+if [ ! -f "$DATADIR/certificate.pem" ]; then
+    echo "$PROG: The certificate must be in the file $DATADIR/certificate.pem." >&2
+    exit 1
+fi
+
+BASEURL="$(echo "$BASEURL" | sed 's#/$##')"
+
+# No files should not be readable by the rest of the world.
+umask 0077
+
+CERT="$(grep -v '^-----' $DATADIR/certificate.pem)"
+
+cat > $DATADIR/metadata.xml <<EOF
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<EntityDescriptor
+ entityID="$ENTITYID"
+ xmlns="urn:oasis:names:tc:SAML:2.0:metadata">
+ <SPSSODescriptor
+   AuthnRequestsSigned="true"
+   WantAssertionsSigned="true"
+   protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
+   <KeyDescriptor use="signing">
+     <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
+       <ds:X509Data>
+         <ds:X509Certificate>$CERT</ds:X509Certificate>
+       </ds:X509Data>
+     </ds:KeyInfo>
+   </KeyDescriptor>
+   <KeyDescriptor use="encryption">
+     <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
+       <ds:X509Data>
+         <ds:X509Certificate>$CERT</ds:X509Certificate>
+       </ds:X509Data>
+     </ds:KeyInfo>
+   </KeyDescriptor>
+   <SingleLogoutService
+     Binding="urn:oasis:names:tc:SAML:2.0:bindings:SOAP"
+     Location="$BASEURL/logout" />
+   <SingleLogoutService
+     Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Redirect"
+     Location="$BASEURL/logout" />
+   <NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</NameIDFormat>
+   <AssertionConsumerService
+     index="0"
+     isDefault="true"
+     Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST"
+     Location="$BASEURL/postResponse" />
+   <AssertionConsumerService
+     index="1"
+     Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-Artifact"
+     Location="$BASEURL/artifactResponse" />
+   <AssertionConsumerService
+     index="2"
+     Binding="urn:oasis:names:tc:SAML:2.0:bindings:PAOS"
+     Location="$BASEURL/paosResponse" />
+ </SPSSODescriptor>
+</EntityDescriptor>
+EOF
+
+umask 0777
+chown apache: $DATADIR/metadata.xml
+echo "Wrote $DATADIR/metadata.xml"

roles/pdc/frontend/handlers/main.yml

@@ -0,0 +1,2 @@
+- name: rebuild metadata
+  command: /etc/httpd/saml2/create-metadata.sh https://pdc{{ env_suffix }}.fedoraproject.org/saml2 https://pdc{{ env_suffix }}.fedoraproject.org/saml2/

roles/pdc/frontend/tasks/main.yml

@@ -93,13 +93,24 @@
   notify: reload httpd
   tags: pdc
 
-- name: Install domain-specific saml2 certs and metadata
+- name: Copy over the metadata.xml rebuild script
+  copy:
+    src: create-metadata.sh
+    dest: /etc/httpd/saml2/create-metadata.sh
+    mode: 0755
+  notify:
+    - rebuild metadata
+    - reload httpd
+  tags: pdc
+
+- name: Install domain-specific saml2 certs
   copy: src="{{ private }}/files/saml2/{{ pdc_domain }}/{{ item }}"
         dest="/etc/httpd/saml2/{{ item }}"
         owner="apache" group="apache" mode=0600
   with_items:
     - certificate.pem
     - certificate.key
-    - metadata.xml
-  notify: reload httpd
+  notify:
+    - rebuild metadata
+    - reload httpd
   tags: pdc