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nextcloud-mcp-server/keycloak/realm-export.json
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Chris Coutinho 6117aaaed3 fix: Complete Keycloak external IdP integration with all tests passing 
This commit completes the Keycloak external identity provider integration,
implementing the ADR-002 architecture where Keycloak acts as an external
OAuth/OIDC provider and Nextcloud validates tokens via the user_oidc app.

Architecture:
  MCP Client → Keycloak (OAuth) → MCP Server → Nextcloud user_oidc → APIs

Key Fixes:

1. Keycloak JWT token configuration
   - Added 'sub' claim protocol mapper to realm-export.json
   - Updated token_verifier.py to accept both 'sub' and 'preferred_username'
   - Ensures tokens contain required OIDC claims

2. Keycloak hostname configuration for Docker networking
   - Implemented --hostname-backchannel-dynamic=true in docker-compose.yml
   - External clients use localhost:8888 (public)
   - Internal services use keycloak:8080 (Docker network)
   - Same issuer (localhost:8888) everywhere for token consistency
   - Restored frontendUrl in realm attributes

3. MCP server provider mode detection
   - Fixed URL normalization to handle port differences (http://app vs http://app:80)
   - Correctly distinguishes integrated mode vs external IdP mode
   - Removes explicit default ports (80 for HTTP, 443 for HTTPS)

4. Nextcloud SSRF protection configuration
   - Added allow_local_remote_servers=true to user_oidc install script
   - Enables Nextcloud to fetch JWKS from internal Keycloak container
   - Required for external IdP token validation

5. OAuth lifespan cleanup
   - Fixed RefreshTokenStorage close() error (uses context managers)
   - Added safe cleanup for oauth_client with hasattr check
   - Prevents session crash on shutdown

6. Test suite fixes
   - Fixed test_user_auto_provisioning to reflect actual behavior
   - Fixed test_scope_filtering_with_keycloak tool name (nc_webdav_write_file)
   - Updated test_keycloak_oauth_client_credentials_discovery for hostname config
   - All 11 Keycloak external IdP tests now passing

Testing:
  ✅ All 11 tests in test_keycloak_external_idp.py passing
  ✅ OAuth token acquisition via Playwright automation
  ✅ Token validation through Nextcloud user_oidc app
  ✅ Write operations (Notes create, Calendar create, File upload)
  ✅ Read operations (search, list, get)
  ✅ Token persistence across multiple operations
  ✅ User authentication and bearer token validation
  ✅ Scope-based tool filtering
  ✅ Error handling for invalid operations

Implementation validates:
  - ADR-002 external identity provider architecture
  - No admin credentials needed in MCP server
  - Centralized identity management via Keycloak
  - Standards-based OAuth 2.0 / OIDC integration
  - User auto-provisioning from IdP claims

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-02 22:03:20 +01:00

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{
"id": "nextcloud-mcp",
"realm": "nextcloud-mcp",
"notBefore": 0,
"defaultSignatureAlgorithm": "RS256",
"revokeRefreshToken": false,
"refreshTokenMaxReuse": 0,
"accessTokenLifespan": 300,
"accessTokenLifespanForImplicitFlow": 900,
"ssoSessionIdleTimeout": 1800,
"ssoSessionMaxLifespan": 36000,
"offlineSessionIdleTimeout": 2592000,
"offlineSessionMaxLifespanEnabled": false,
"offlineSessionMaxLifespan": 5184000,
"accessCodeLifespan": 60,
"accessCodeLifespanUserAction": 300,
"accessCodeLifespanLogin": 1800,
"enabled": true,
"sslRequired": "external",
"registrationAllowed": false,
"loginWithEmailAllowed": true,
"duplicateEmailsAllowed": false,
"resetPasswordAllowed": false,
"editUsernameAllowed": false,
"bruteForceProtected": false,
"attributes": {
"frontendUrl": "http://localhost:8888"
},
"roles": {
"realm": [
{
"name": "offline_access",
"description": "${role_offline-access}",
"composite": false,
"clientRole": false
},
{
"name": "uma_authorization",
"description": "${role_uma_authorization}",
"composite": false,
"clientRole": false
},
{
"name": "default-roles-nextcloud-mcp",
"description": "${role_default-roles}",
"composite": true,
"composites": {
"realm": ["offline_access", "uma_authorization"]
},
"clientRole": false
}
]
},
"users": [
{
"username": "admin",
"enabled": true,
"email": "admin@example.com",
"emailVerified": true,
"firstName": "Admin",
"lastName": "User",
"credentials": [
{
"type": "password",
"value": "admin",
"temporary": false
}
],
"realmRoles": ["default-roles-nextcloud-mcp", "offline_access"],
"attributes": {
"quota": ["1073741824"]
}
}
],
"clients": [
{
"clientId": "nextcloud",
"name": "Nextcloud Resource Server",
"description": "Resource server for Nextcloud APIs - used by user_oidc app for bearer token validation",
"enabled": true,
"clientAuthenticatorType": "client-secret",
"secret": "nextcloud-secret-change-in-production",
"redirectUris": [],
"webOrigins": [],
"bearerOnly": true,
"consentRequired": false,
"standardFlowEnabled": false,
"implicitFlowEnabled": false,
"directAccessGrantsEnabled": false,
"serviceAccountsEnabled": false,
"publicClient": false,
"protocol": "openid-connect",
"attributes": {
"display.on.consent.screen": "false"
},
"fullScopeAllowed": true,
"nodeReRegistrationTimeout": -1
},
{
"clientId": "nextcloud-mcp-server",
"name": "Nextcloud MCP Server",
"enabled": true,
"clientAuthenticatorType": "client-secret",
"secret": "mcp-secret-change-in-production",
"redirectUris": [
"http://localhost:*",
"http://127.0.0.1:*",
"http://localhost:*/callback",
"http://127.0.0.1:*/callback"
],
"webOrigins": ["+"],
"bearerOnly": false,
"consentRequired": false,
"standardFlowEnabled": true,
"implicitFlowEnabled": false,
"directAccessGrantsEnabled": true,
"serviceAccountsEnabled": true,
"publicClient": false,
"frontchannelLogout": false,
"protocol": "openid-connect",
"attributes": {
"pkce.code.challenge.method": "S256",
"use.refresh.tokens": "true",
"backchannel.logout.session.required": "true",
"backchannel.logout.url": "http://app:80/index.php/apps/user_oidc/backchannel-logout/keycloak",
"oauth2.device.authorization.grant.enabled": "false",
"oidc.ciba.grant.enabled": "false",
"client_credentials.use_refresh_token": "false",
"display.on.consent.screen": "false",
"token.exchange.grant.enabled": "true",
"client.token.exchange.standard.enabled": "true"
},
"fullScopeAllowed": true,
"nodeReRegistrationTimeout": -1,
"protocolMappers": [
{
"name": "audience-nextcloud",
"protocol": "openid-connect",
"protocolMapper": "oidc-audience-mapper",
"consentRequired": false,
"config": {
"included.custom.audience": "nextcloud",
"access.token.claim": "true",
"id.token.claim": "false"
}
},
{
"name": "sub",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-property-mapper",
"consentRequired": false,
"config": {
"userinfo.token.claim": "true",
"user.attribute": "username",
"id.token.claim": "true",
"access.token.claim": "true",
"claim.name": "sub",
"jsonType.label": "String"
}
},
{
"name": "full name",
"protocol": "openid-connect",
"protocolMapper": "oidc-full-name-mapper",
"consentRequired": false,
"config": {
"id.token.claim": "true",
"access.token.claim": "true",
"userinfo.token.claim": "true"
}
},
{
"name": "email",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-property-mapper",
"consentRequired": false,
"config": {
"userinfo.token.claim": "true",
"user.attribute": "email",
"id.token.claim": "true",
"access.token.claim": "true",
"claim.name": "email",
"jsonType.label": "String"
}
},
{
"name": "preferred_username",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-property-mapper",
"consentRequired": false,
"config": {
"userinfo.token.claim": "true",
"user.attribute": "username",
"id.token.claim": "true",
"access.token.claim": "true",
"claim.name": "preferred_username",
"jsonType.label": "String"
}
},
{
"name": "quota",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-attribute-mapper",
"consentRequired": false,
"config": {
"userinfo.token.claim": "true",
"user.attribute": "quota",
"id.token.claim": "true",
"access.token.claim": "true",
"claim.name": "quota",
"jsonType.label": "String"
}
}
],
"defaultClientScopes": ["web-origins", "profile", "roles", "email"],
"optionalClientScopes": [
"address",
"phone",
"offline_access",
"microprofile-jwt",
"notes:read",
"notes:write",
"calendar:read",
"calendar:write",
"contacts:read",
"contacts:write",
"cookbook:read",
"cookbook:write",
"deck:read",
"deck:write",
"tables:read",
"tables:write",
"files:read",
"files:write",
"sharing:read",
"sharing:write",
"todo:read",
"todo:write"
]
}
],
"clientScopes": [
{
"name": "offline_access",
"description": "OpenID Connect built-in scope: offline_access",
"protocol": "openid-connect",
"attributes": {
"consent.screen.text": "${offlineAccessScopeConsentText}",
"display.on.consent.screen": "true"
}
},
{
"name": "profile",
"description": "OpenID Connect built-in scope: profile",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true"
},
"protocolMappers": [
{
"name": "full name",
"protocol": "openid-connect",
"protocolMapper": "oidc-full-name-mapper",
"consentRequired": false,
"config": {
"id.token.claim": "true",
"access.token.claim": "true",
"userinfo.token.claim": "true"
}
}
]
},
{
"name": "email",
"description": "OpenID Connect built-in scope: email",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true"
},
"protocolMappers": [
{
"name": "email",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-property-mapper",
"consentRequired": false,
"config": {
"userinfo.token.claim": "true",
"user.attribute": "email",
"id.token.claim": "true",
"access.token.claim": "true",
"claim.name": "email",
"jsonType.label": "String"
}
},
{
"name": "email verified",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-property-mapper",
"consentRequired": false,
"config": {
"userinfo.token.claim": "true",
"user.attribute": "emailVerified",
"id.token.claim": "true",
"access.token.claim": "true",
"claim.name": "email_verified",
"jsonType.label": "boolean"
}
}
]
},
{
"name": "roles",
"description": "OpenID Connect scope for add user roles to the access token",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "false",
"display.on.consent.screen": "true"
},
"protocolMappers": [
{
"name": "realm roles",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-realm-role-mapper",
"consentRequired": false,
"config": {
"user.attribute": "foo",
"access.token.claim": "true",
"claim.name": "realm_access.roles",
"jsonType.label": "String",
"multivalued": "true"
}
},
{
"name": "client roles",
"protocol": "openid-connect",
"protocolMapper": "oidc-usermodel-client-role-mapper",
"consentRequired": false,
"config": {
"user.attribute": "foo",
"access.token.claim": "true",
"claim.name": "resource_access.${client_id}.roles",
"jsonType.label": "String",
"multivalued": "true"
}
}
]
},
{
"name": "web-origins",
"description": "OpenID Connect scope for add allowed web origins to the access token",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "false",
"display.on.consent.screen": "false"
},
"protocolMappers": [
{
"name": "allowed web origins",
"protocol": "openid-connect",
"protocolMapper": "oidc-allowed-origins-mapper",
"consentRequired": false,
"config": {}
}
]
},
{
"name": "notes:read",
"description": "Nextcloud Notes read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your notes"
}
},
{
"name": "notes:write",
"description": "Nextcloud Notes write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete your notes"
}
},
{
"name": "calendar:read",
"description": "Nextcloud Calendar read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your calendars and events"
}
},
{
"name": "calendar:write",
"description": "Nextcloud Calendar write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete calendars and events"
}
},
{
"name": "contacts:read",
"description": "Nextcloud Contacts read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your contacts"
}
},
{
"name": "contacts:write",
"description": "Nextcloud Contacts write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete contacts"
}
},
{
"name": "cookbook:read",
"description": "Nextcloud Cookbook read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your recipes"
}
},
{
"name": "cookbook:write",
"description": "Nextcloud Cookbook write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete recipes"
}
},
{
"name": "deck:read",
"description": "Nextcloud Deck read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your boards and cards"
}
},
{
"name": "deck:write",
"description": "Nextcloud Deck write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete boards and cards"
}
},
{
"name": "tables:read",
"description": "Nextcloud Tables read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your tables and rows"
}
},
{
"name": "tables:write",
"description": "Nextcloud Tables write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete tables and rows"
}
},
{
"name": "files:read",
"description": "Nextcloud Files read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your files"
}
},
{
"name": "files:write",
"description": "Nextcloud Files write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Upload, update, and delete files"
}
},
{
"name": "sharing:read",
"description": "Nextcloud Sharing read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "View shared resources"
}
},
{
"name": "sharing:write",
"description": "Nextcloud Sharing write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create and manage shares"
}
},
{
"name": "todo:read",
"description": "Nextcloud Tasks/Todo read access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Read your tasks"
}
},
{
"name": "todo:write",
"description": "Nextcloud Tasks/Todo write access",
"protocol": "openid-connect",
"attributes": {
"include.in.token.scope": "true",
"display.on.consent.screen": "true",
"consent.screen.text": "Create, update, and delete tasks"
}
}
]
}
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