Keycloak as an identity provider

#!/bin/bash

# Keycloak Server URL und Admin Credentials
KEYCLOAK_URL="http://localhost:8080"
KEYCLOAK_REALM="master"
ADMIN_USER=""
ADMIN_PASSWORD=""

# Neue Realm-, Client- und Benutzer-Konfiguration
NEW_REALM="bpc"
NEW_CLIENT="bpc"
CLIENT_SECRET="bpc-test-only"
NEW_ROLE="bpcadmin"
BPC_USER="bpcuser"
BPC_ADMIN="bpcadmin"

# Benutzer-Daten
BPC_USER_FIRSTNAME="BPC"
BPC_USER_LASTNAME="User"
BPC_USER_EMAIL="bpcuser@example.com"

BPC_ADMIN_FIRSTNAME="BPC"
BPC_ADMIN_LASTNAME="Admin"
BPC_ADMIN_EMAIL="bpcadmin@example.com"

# Redirect-URL für den Client
REDIRECT_URL="http://localhost*"

# Funktion zur Eingabe von Benutzername und Passwort
read -p "Gib den Keycloak Admin Benutzernamen ein: " ADMIN_USER
read -s -p "Gib das Keycloak Admin Passwort ein: " ADMIN_PASSWORD
echo ""

# Abrufen eines Tokens vom Keycloak-Server
TOKEN=$(curl -s \
  -d "client_id=admin-cli" \
  -d "username=$ADMIN_USER" \
  -d "password=$ADMIN_PASSWORD" \
  -d "grant_type=password" \
  "${KEYCLOAK_URL}/realms/${KEYCLOAK_REALM}/protocol/openid-connect/token" | jq -r .access_token)

# Prüfen, ob das Token erfolgreich abgerufen wurde
if [ -z "$TOKEN" ]; then
  echo "Fehler beim Abrufen des Tokens. Überprüfe Benutzername/Passwort und Keycloak-URL."
  exit 1
fi

# Realm "bpc" erstellen mit Internationalisierung
# Für Login Theme die folgende Zeile mit aufnehmen
# "loginTheme": "theme-id",
echo "Erstelle den Realm '${NEW_REALM}' mit Login-Theme 'foo-theme' und Internationalisierung..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "realm": "'"${NEW_REALM}"'",
    "enabled": true,
    "internationalizationEnabled": true,
    "supportedLocales": ["en", "de"],
    "defaultLocale": "en"
  }'

# Client "bpc" erstellen
echo "Erstelle den Client '${NEW_CLIENT}' im Realm '${NEW_REALM}' mit Redirect-URL '${REDIRECT_URL}'..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/clients" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "clientId": "'"${NEW_CLIENT}"'",
    "secret": "'"${CLIENT_SECRET}"'",
    "enabled": true,
    "redirectUris": ["'"${REDIRECT_URL}"'"],
    "directAccessGrantsEnabled": true
  }'

# Realm-Rolle "bpcadmin" erstellen
echo "Erstelle die Realm-Rolle '${NEW_ROLE}'..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/roles" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "'"${NEW_ROLE}"'"
  }'

# Benutzer "bpcuser" erstellen
echo "Erstelle den Benutzer '${BPC_USER}'..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/users" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "username": "'"${BPC_USER}"'",
    "firstName": "'"${BPC_USER_FIRSTNAME}"'",
    "lastName": "'"${BPC_USER_LASTNAME}"'",
    "email": "'"${BPC_USER_EMAIL}"'",
    "enabled": true,
    "credentials": [{
      "type": "password",
      "value": "'"${BPC_USER}"'",
      "temporary": false
    }]
  }'

# Benutzer "bpcadmin" erstellen
echo "Erstelle den Benutzer '${BPC_ADMIN}'..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/users" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "username": "'"${BPC_ADMIN}"'",
    "firstName": "'"${BPC_ADMIN_FIRSTNAME}"'",
    "lastName": "'"${BPC_ADMIN_LASTNAME}"'",
    "email": "'"${BPC_ADMIN_EMAIL}"'",
    "enabled": true,
    "credentials": [{
      "type": "password",
      "value": "'"${BPC_ADMIN}"'",
      "temporary": false
    }]
  }'

# Benutzer-ID des Benutzers "bpcadmin" abrufen
BPC_ADMIN_ID=$(curl -s -X GET "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/users?username=${BPC_ADMIN}" \
  -H "Authorization: Bearer $TOKEN" | jq -r '.[0].id')

# Rollen-ID der Rolle "bpcadmin" abrufen
ROLE_ID=$(curl -s -X GET "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/roles/${NEW_ROLE}" \
  -H "Authorization: Bearer $TOKEN" | jq -r '.id')

# Rolle "bpcadmin" dem Benutzer "bpcadmin" zuweisen
echo "Weise die Rolle '${NEW_ROLE}' dem Benutzer '${BPC_ADMIN}' zu..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/users/${BPC_ADMIN_ID}/role-mappings/realm" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '[
    {
      "id": "'"${ROLE_ID}"'",
      "name": "'"${NEW_ROLE}"'"
    }
  ]'

# Abrufen der Scope-ID für "profile" im Realm "bpc"
echo "Rufe die Scope-ID für 'profile' im Realm '${NEW_REALM}' ab..."
PROFILE_SCOPE_ID=$(curl -s -X GET "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/client-scopes" \
  -H "Authorization: Bearer $TOKEN" | jq -r '.[] | select(.name == "profile") | .id')

# Prüfen, ob die Scope-ID für "profile" gefunden wurde
if [ -z "$PROFILE_SCOPE_ID" ]; then
  echo "Fehler: Der Scope 'profile' wurde im Realm '${NEW_REALM}' nicht gefunden."
  exit 1
fi

# Mapper "Impersonator User ID" zum "profile" Scope hinzufügen
echo "Füge dem Scope 'profile' den Mapper 'Impersonator User ID' hinzu..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/client-scopes/${PROFILE_SCOPE_ID}/protocol-mappers/models" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Impersonator User ID",
    "protocol": "openid-connect",
    "protocolMapper": "oidc-usersessionmodel-note-mapper",
    "config": {
      "user.session.note": "IMPERSONATOR_ID",
      "id.token.claim": "true",
      "introspection.token.claim": "true",
      "access.token.claim": "true",
      "claim.name": "impersonator.id",
      "jsonType.label": "String"
    }
  }'

# Mapper "Impersonator Username" zum "profile" Scope hinzufügen
echo "Füge dem Scope 'profile' den Mapper 'Impersonator Username' hinzu..."
curl -s -X POST "${KEYCLOAK_URL}/admin/realms/${NEW_REALM}/client-scopes/${PROFILE_SCOPE_ID}/protocol-mappers/models" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Impersonator Username",
    "protocol": "openid-connect",
    "protocolMapper": "oidc-usersessionmodel-note-mapper",
    "config": {
        "user.session.note": "IMPERSONATOR_USERNAME",
        "id.token.claim": "true",
        "introspection.token.claim": "true",
        "access.token.claim": "true",
        "claim.name": "impersonator.username",
        "jsonType.label": "String"
    }
  }'

echo "Fertig!"