Files
nextcloud-mcp-server/docker-compose.yml
T
Chris Coutinho 01d1cf9190 feat: integrate token exchange into MCP server application
Wire up RFC 8693 token exchange throughout the MCP server to support
stateless per-request token conversion for external IdP scenarios.

Changes:

Authentication Flow:
- Add exchange_token_for_audience() for pure RFC 8693 exchange
- Update context_helper to use stateless token exchange
- Remove fallback to standard OAuth on exchange failure
- Make storage initialization lazy (only for delegation, not MCP tools)

Application Configuration:
- Add ENABLE_TOKEN_EXCHANGE environment variable support
- Skip provisioning tools when token exchange enabled
- Pass mcp_client_id to token broker for proper validation
- Update docker-compose.yml with token exchange config

Token Exchange Service:
- Add TOKEN_EXCHANGE_GRANT constant
- Implement exchange_token_for_audience() method
- Support both "mcp-server" and client_id audiences
- Lazy storage initialization for delegation scenarios
- Enhanced error handling and logging

Progressive Token Verifier:
- Add mcp_client_id parameter for external IdP validation
- Accept both "mcp-server" and configured client_id
- Support external IdP token verification

Key Behavior Changes:
- When ENABLE_TOKEN_EXCHANGE=true: Each MCP tool call triggers
  stateless token exchange (client token → Nextcloud token)
- When ENABLE_TOKEN_EXCHANGE=false: Uses pass-through mode
  (validates Flow 1 token and passes to Nextcloud)
- No provisioning tools registered in exchange mode
- No refresh tokens needed for request-time operations

This completes the token exchange implementation. The MCP server now
supports both pass-through (default) and exchange (opt-in) modes for
federated authentication architectures.

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

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-04 02:32:40 +01:00

186 lines
7.2 KiB
YAML

services:
# Note: MariaDB is external service. You can find more information about the configuration here:
# https://hub.docker.com/_/mariadb
db:
# Note: Check the recommend version here: https://docs.nextcloud.com/server/latest/admin_manual/installation/system_requirements.html#server
image: docker.io/library/mariadb:lts@sha256:ae6119716edac6998ae85508431b3d2e666530ddf4e94c61a10710caec9b0f71
restart: always
command: --transaction-isolation=READ-COMMITTED
volumes:
- db:/var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=password
- MYSQL_PASSWORD=password
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
# Note: Redis is an external service. You can find more information about the configuration here:
# https://hub.docker.com/_/redis
redis:
image: docker.io/library/redis:alpine@sha256:59b6e694653476de2c992937ebe1c64182af4728e54bb49e9b7a6c26614d8933
restart: always
app:
image: docker.io/library/nextcloud:32.0.1@sha256:1e4eae55eebe094cae6f9e7b6e0b4bccf4a4fe7b7e6f6f8f57010994b3b2ee42
restart: always
ports:
- 0.0.0.0:8080:80
depends_on:
- redis
- db
volumes:
- nextcloud:/var/www/html
- ./app-hooks:/docker-entrypoint-hooks.d:ro
# Mount OIDC development directory outside /var/www/html to avoid rsync conflicts
# The post-installation hook will register /opt/apps as an additional app directory
- ./third_party:/opt/apps:ro
environment:
- NEXTCLOUD_TRUSTED_DOMAINS=app
- NEXTCLOUD_ADMIN_USER=admin
- NEXTCLOUD_ADMIN_PASSWORD=admin
- MYSQL_PASSWORD=password
- MYSQL_DATABASE=nextcloud
- MYSQL_USER=nextcloud
- MYSQL_HOST=db
- REDIS_HOST=redis
healthcheck:
test: ["CMD-SHELL", "curl -Ss http://localhost/status.php | grep '\"installed\":true' || exit 1"]
interval: 10s
timeout: 30s
retries: 30
recipes:
image: docker.io/library/nginx:alpine@sha256:b3c656d55d7ad751196f21b7fd2e8d4da9cb430e32f646adcf92441b72f82b14
restart: always
volumes:
- ./tests/fixtures/test_recipe.html:/usr/share/nginx/html/test_recipe.html:ro
- ./tests/fixtures/nginx.conf:/etc/nginx/nginx.conf:ro
unstructured:
image: downloads.unstructured.io/unstructured-io/unstructured-api:latest@sha256:a43ab55898599157fb0e0e097dabb8ecdd1d8e3df1ae5b67c6e15a136b171a6c
restart: always
ports:
- 127.0.0.1:8002:8000
# Unstructured API runs on port 8000 internally
# We expose it on 8002 externally to avoid conflict
profiles:
- unstructured
mcp:
build: .
command: ["--transport", "streamable-http"]
restart: always
depends_on:
app:
condition: service_healthy
ports:
- 127.0.0.1:8000:8000
environment:
- NEXTCLOUD_HOST=http://app:80
- NEXTCLOUD_USERNAME=admin
- NEXTCLOUD_PASSWORD=admin
mcp-oauth:
build: .
command: ["--transport", "streamable-http", "--oauth", "--port", "8001", "--oauth-token-type", "jwt"]
restart: always
depends_on:
app:
condition: service_healthy
ports:
- 127.0.0.1:8001:8001
environment:
# Generic OIDC configuration (integrated mode - Nextcloud OIDC app)
# OIDC_DISCOVERY_URL not set - defaults to NEXTCLOUD_HOST/.well-known/openid-configuration
# OIDC_CLIENT_ID not set - uses Dynamic Client Registration (DCR)
- NEXTCLOUD_HOST=http://app:80
- NEXTCLOUD_MCP_SERVER_URL=http://localhost:8001
- NEXTCLOUD_PUBLIC_ISSUER_URL=http://localhost:8080
- NEXTCLOUD_OIDC_SCOPES=openid profile email 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
# Refresh token storage (ADR-002 Tier 1)
- ENABLE_OFFLINE_ACCESS=true
- TOKEN_ENCRYPTION_KEY=ESF1BvEQdGYsCluwMx9Cxvw3uh5pFowPH7Rg_nIliyo=
- TOKEN_STORAGE_DB=/app/data/tokens.db
# ADR-004: Use Hybrid Flow (server intercepts OAuth callback)
# Set to false to enable Hybrid Flow tests - server stores refresh token and issues MCP codes
# NO admin credentials - using OAuth with Dynamic Client Registration (DCR)
# Client credentials registered via RFC 7591 and stored in volume
# JWT token type is used for testing (faster validation, scopes embedded in token)
volumes:
- oauth-client-storage:/app/.oauth
- oauth-tokens:/app/data
keycloak:
image: quay.io/keycloak/keycloak:26.4.2
command:
- "start-dev"
- "--import-realm"
- "--hostname=http://localhost:8888"
- "--hostname-strict=false"
- "--hostname-backchannel-dynamic=true"
- "--features=preview" # Enable Legacy V1 token exchange (supports both Standard V2 and Legacy V1)
ports:
- 127.0.0.1:8888:8080
environment:
- KC_BOOTSTRAP_ADMIN_USERNAME=admin
- KC_BOOTSTRAP_ADMIN_PASSWORD=admin
volumes:
- ./keycloak/realm-export.json:/opt/keycloak/data/import/realm.json:ro
healthcheck:
test: ["CMD-SHELL", "exec 3<>/dev/tcp/localhost/8080 && echo -e 'GET /realms/nextcloud-mcp HTTP/1.1\\r\\nHost: localhost\\r\\nConnection: close\\r\\n\\r\\n' >&3 && cat <&3 | grep -q 'HTTP/1.1 200'"]
interval: 10s
timeout: 5s
retries: 30
mcp-keycloak:
build: .
command: ["--transport", "streamable-http", "--oauth", "--port", "8002"]
restart: always
depends_on:
keycloak:
condition: service_healthy
app:
condition: service_started
ports:
- 127.0.0.1:8002:8002
environment:
# Generic OIDC configuration (external IdP mode - Keycloak)
# Provider auto-detected from OIDC_DISCOVERY_URL issuer
# Using internal Docker hostname for discovery to get consistent issuer
- OIDC_DISCOVERY_URL=http://keycloak:8080/realms/nextcloud-mcp/.well-known/openid-configuration
- OIDC_CLIENT_ID=nextcloud-mcp-server
- OIDC_CLIENT_SECRET=mcp-secret-change-in-production
- OIDC_JWKS_URI=http://keycloak:8080/realms/nextcloud-mcp/protocol/openid-connect/certs
# Nextcloud API endpoint (for accessing APIs with validated token)
- NEXTCLOUD_HOST=http://app:80
- NEXTCLOUD_MCP_SERVER_URL=http://localhost:8002
- NEXTCLOUD_PUBLIC_ISSUER_URL=http://localhost:8888/realms/nextcloud-mcp
# Refresh token storage (ADR-002 Tier 1 & 2)
- ENABLE_OFFLINE_ACCESS=true
- TOKEN_ENCRYPTION_KEY=ESF1BvEQdGYsCluwMx9Cxvw3uh5pFowPH7Rg_nIliyo=
- TOKEN_STORAGE_DB=/app/data/tokens.db
# Token exchange (RFC 8693) - convert aud:nextcloud-mcp-server → aud:nextcloud
- ENABLE_TOKEN_EXCHANGE=true
# OAuth scopes (optional - uses defaults if not specified)
- NEXTCLOUD_OIDC_SCOPES=openid profile email offline_access 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
# NO admin credentials - using external IdP OAuth only!
volumes:
- keycloak-tokens:/app/data
- keycloak-oauth-storage:/app/.oauth
volumes:
nextcloud:
db:
oauth-client-storage:
oauth-tokens:
keycloak-tokens:
keycloak-oauth-storage: