Commit Graph

9 Commits

Author SHA1 Message Date
Shaun Arman
7cc4f0f689 fix(mcp): treat missing resources/list as non-fatal for servers that don't implement it 2026-06-01 13:19:34 -05:00
Shaun Arman
7c2452e3f7 fix(mcp): fix test_allows_safe_env_vars test failure
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The test was trying to spawn a process which requires a Tokio runtime.
Changed the test to only verify validation logic by checking that safe
environment variables don't trigger 'Dangerous environment variable' errors.

Uses /usr/bin/nonexistent as command so spawn will fail (command not found)
but validation will pass for safe env vars like DEBUG, API_KEY, PATH, etc.

All 243 tests now passing.
2026-06-01 12:41:26 -05:00
Shaun Arman
0469f121b1 fix(mcp): add validation to block dangerous environment variables
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Add defense-in-depth security validation for stdio transport to reject
environment variables that could be used for privilege escalation attacks.
Blocks the following dangerous variables (case-insensitive):
- LD_PRELOAD (Linux)
- LD_LIBRARY_PATH (Linux)
- DYLD_INSERT_LIBRARIES (macOS)
- DYLD_LIBRARY_PATH (macOS)
- DYLD_FRAMEWORK_PATH (macOS)
- DYLD_FALLBACK_LIBRARY_PATH (macOS)

These variables can inject malicious libraries into spawned processes and
should never be user-configurable for MCP servers.

Add comprehensive tests:
- test_rejects_relative_path: Verify existing path validation
- test_rejects_dangerous_env_vars: Test all blocked variables
- test_rejects_dangerous_env_vars_case_insensitive: Verify lowercase variants blocked
- test_allows_safe_env_vars: Verify legitimate vars (DEBUG, PATH, API_KEY) allowed

All tests passing.
2026-06-01 12:16:11 -05:00
Shaun Arman
d264e6b09d fix(mcp): improve UX clarity for encrypted env vars during edit
Add clearer placeholder and helper text to explain that encrypted environment
variables are never displayed for security reasons. When editing an existing
server, the encrypted_env field shows a placeholder explaining that leaving it
blank will preserve existing values.

Also apply cargo fmt formatting fixes to store.rs.
2026-06-01 11:58:52 -05:00
Shaun Arman
2ffe2bb6d8 fix(mcp): parse and merge env vars in discovery layer
- Parse plaintext env from transport_config.env (stdio)
- Decrypt encrypted env from env_config column (stdio)
- Merge env vars with encrypted taking precedence
- Parse custom headers from transport_config.headers (HTTP)
- Update connect_stdio() to accept HashMap<String, String> for env
- Update connect_http() to accept HashMap<String, String> for headers
- Apply env vars to tokio::process::Command in stdio transport
- Log warning for HTTP custom headers (rmcp v1.7.0 limitation)

All 19 MCP tests passing.
2026-06-01 08:25:49 -05:00
Shaun Arman
a970f171a8 fix(mcp): add env encryption to store layer
- Add env_config field to McpServer, CreateMcpServerRequest, UpdateMcpServerRequest
- Encrypt env_config using encrypt_token() on create/update
- Decrypt env_config in get_server_env_config() helper function
- Handle clearing env_config with empty string
- Add comprehensive tests:
  - test_env_config_encrypted_at_rest()
  - test_update_env_config()
  - test_clear_env_config_with_empty_string()
  - test_env_config_none_preserves_existing()

All tests passing. Follows same encryption pattern as auth_value.
2026-06-01 08:22:29 -05:00
Shaun Arman
28cfcf1ef4 fix(mcp): add timeouts, delete audit log, OAuth state nonce; improve PR review prompt
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- call_tool: 30s hard timeout via tokio::time::timeout
- discover_server: 60s hard timeout wrapping full connect+discover sequence
- delete_mcp_server: write_audit_event before cascade delete, capturing
  server name, tool count, and resource count
- initiate_mcp_oauth: append cryptographically random state nonce for CSRF
- pr-review.yml: rewrite prompt to require line-quoted evidence for every
  finding and eliminate hallucinated false positives
2026-05-23 17:08:23 -05:00
Shaun Arman
a779756e48 style(mcp): apply rustfmt formatting
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2026-05-23 16:48:26 -05:00
Shaun Arman
3588399dfd feat(mcp): add MCP Server Support with TDD implementation
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Adds full Model Context Protocol (MCP) server management, enabling the
AI assistant to discover and call tools from external MCP servers during
triage conversations.

Backend (Rust):
- rmcp 1.7.0 dependency (client + stdio + Streamable HTTP transports)
- Migration 018: mcp_servers, mcp_tools, mcp_resources tables with
  CHECK constraints for transport_type, auth_type, discovery_status
- src/mcp/ module: models, store, client, adapter, discovery, commands,
  transport/{stdio,http}
- AppState gains mcp_connections: Arc<TokioMutex<HashMap<...>>>
- .setup() hook auto-discovers enabled servers at startup
- 8 new Tauri commands wired into invoke_handler
- execute_mcp_tool_call: PII scan + mandatory audit_log before execution
- Auth values encrypted at rest via integrations::auth::encrypt_token();
  scrubbed before any frontend response

Frontend:
- MCPServers.tsx settings page (/settings/mcp) with server list,
  status badges, Discover Now, Add/Edit modal, enable/disable toggle
- tauriCommands.ts: McpServer, McpTool, McpServerStatus types + 8 cmds
- App.tsx: Plug icon, /settings/mcp route, sidebar nav entry

Tests (TDD): 15 new tests, all green
- 5 migration tests (written before migration, red → green)
- 5 store CRUD + encryption tests
- 5 adapter sanitization + conversion tests

Verification: 185/185 Rust, 94/94 Vitest, clippy -D warnings: 0
2026-05-23 16:23:48 -05:00