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simstudioai--sim/apps/sim/lib/mcp/oauth/auth.ts
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chore: import upstream snapshot with attribution
2026-07-13 13:20:55 +08:00

20 lines
859 B
TypeScript

import { auth, type OAuthClientProvider } from '@modelcontextprotocol/sdk/client/auth.js'
import { createSsrfGuardedMcpFetch } from '@/lib/mcp/pinned-fetch'
type McpAuthOptions = Parameters<typeof auth>[1]
/**
* Wraps the MCP SDK's `auth()` and defaults `fetchFn` to the SSRF-guarded
* fetch. Every URL touched during an MCP OAuth exchange — discovery,
* authorization, token, and revocation endpoints — can come from
* attacker-controllable authorization-server metadata, so callers must not
* be able to omit the guard by forgetting to pass `fetchFn` explicitly.
* Pass `fetchFn` in `options` to override (e.g. in tests).
*/
export function mcpAuthGuarded(
provider: OAuthClientProvider,
options: McpAuthOptions
): ReturnType<typeof auth> {
return auth(provider, { ...options, fetchFn: options.fetchFn ?? createSsrfGuardedMcpFetch() })
}