(Token Federation 2/3) #319
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This PR introduces the foundational token provider system that enables custom token sources for authentication. This is the first of three PRs implementing token federation support. New components: - ITokenProvider: Core interface for token providers - Token: Token class with JWT parsing and expiration handling - StaticTokenProvider: Provides a constant token - ExternalTokenProvider: Delegates to a callback function - TokenProviderAuthenticator: Adapts token providers to IAuthentication New auth types in ConnectionOptions: - 'token-provider': Use a custom ITokenProvider - 'external-token': Use a callback function - 'static-token': Use a static token string
This PR adds the federation and caching layer for token providers. This is the second of three PRs implementing token federation support. New components: - CachedTokenProvider: Wraps providers with automatic caching - Configurable refresh threshold (default 5 minutes before expiry) - Thread-safe handling of concurrent requests - clearCache() method for manual invalidation - FederationProvider: Wraps providers with RFC 8693 token exchange - Automatically exchanges external IdP tokens for Databricks tokens - Compares JWT issuer with Databricks host to determine if exchange needed - Graceful fallback to original token on exchange failure - Supports optional clientId for M2M/service principal federation - utils.ts: JWT decoding and host comparison utilities - decodeJWT: Decode JWT payload without verification - getJWTIssuer: Extract issuer from JWT - isSameHost: Compare hostnames ignoring ports New connection options: - enableTokenFederation: Enable automatic token exchange - federationClientId: Client ID for M2M federation
madhav-db
requested review from
deeksha-db,
gopalldb,
jackyhu-db,
jadewang-db,
jayantsing-db,
jprakash-db,
samikshya-db,
shivam2680 and
vikrantpuppala
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Pull request overview
This PR implements a token provider infrastructure for Databricks SQL, enabling automatic token caching and federation with external identity providers through RFC 8693 token exchange.
Key Changes:
- Added token provider system with caching and federation capabilities
- Introduced three new authentication types:
token-provider,external-token, andstatic-token - Implemented automatic token exchange for external IdP tokens (Azure AD, Google, Okta, etc.)
Reviewed changes
Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
lib/connection/auth/tokenProvider/Token.ts |
Core token representation with expiration tracking and JWT parsing |
lib/connection/auth/tokenProvider/ITokenProvider.ts |
Interface defining token provider contract |
lib/connection/auth/tokenProvider/StaticTokenProvider.ts |
Provider for static tokens with optional JWT parsing |
lib/connection/auth/tokenProvider/ExternalTokenProvider.ts |
Provider that delegates to external callback functions |
lib/connection/auth/tokenProvider/CachedTokenProvider.ts |
Caching wrapper with configurable refresh threshold |
lib/connection/auth/tokenProvider/FederationProvider.ts |
RFC 8693 token exchange implementation |
lib/connection/auth/tokenProvider/TokenProviderAuthenticator.ts |
Adapter between token providers and authentication system |
lib/connection/auth/tokenProvider/utils.ts |
JWT decoding and hostname comparison utilities |
lib/connection/auth/tokenProvider/index.ts |
Public API exports for token provider module |
lib/DBSQLClient.ts |
Integration of token providers with client authentication |
lib/contracts/IDBSQLClient.ts |
New connection options for token-based authentication |
tests/unit/connection/auth/tokenProvider/*.test.ts |
Comprehensive test coverage for all token provider components |
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LoggerStub doesn't have a logs property, so removed tests that checked for debug and warning log messages. The important behavior (token provider authentication) is still tested.
…ication - Updated Token.fromJWT() documentation to reflect that it handles decoding failures gracefully instead of throwing errors - Removed duplicate TokenCallback type definition from IDBSQLClient.ts - Now imports TokenCallback from ExternalTokenProvider.ts to maintain a single source of truth
Removed nock dependency from FederationProvider tests since it's not available in package.json. Simplified tests to focus on the pass-through logic without mocking HTTP calls: - Pass-through when issuer matches host - Pass-through for non-JWT tokens - Case-insensitive host matching - Port-ignoring host matching The core logic (determining when exchange is needed) is still tested.
- Remove unused decodeJWT import from FederationProvider - Move extractHostname before isSameHost to fix use-before-define - Add empty hostname validation to isSameHost 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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This PR adds the federation and caching layer for token providers, enabling automatic token exchange with external identity providers.
New Components
New Connection Options
authType: 'token-provider' | 'external-token' | 'static-token'
enableTokenFederation?: boolean // Enable RFC 8693 token exchange
federationClientId?: string // Client ID for M2M/SP federation