OpenShell/proto/sandbox.proto

// SPDX-FileCopyrightText: Copyright (c) 2025-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0

syntax = "proto3";

package openshell.sandbox.v1;

import "google/protobuf/struct.proto";

// Sandbox-supervisor configuration and policy messages.
//
// Conventions:
// - This file owns messages exchanged between the gateway and the sandbox
//   supervisor/runtime.
// - Public sandbox resource types live in `openshell.proto`.
// - Internal compute-driver sandbox observation types live in `compute_driver.proto`.

// Sandbox security policy configuration.
message SandboxPolicy {
  // Policy version.
  uint32 version = 1;
  // Filesystem access policy.
  FilesystemPolicy filesystem = 2;
  // Landlock configuration.
  LandlockPolicy landlock = 3;
  // Process execution policy.
  ProcessPolicy process = 4;
  // Network access policies keyed by name (e.g. "claude_code", "gitlab").
  map<string, NetworkPolicyRule> network_policies = 5;
  // Reusable supervisor middleware configs for network egress, keyed by their
  // policy-local names. At most 10 configs are accepted, and at most 10 stages
  // can be selected per request.
  map<string, NetworkMiddlewareConfig> network_middlewares = 6;
}

// Filesystem access policy.
message FilesystemPolicy {
  // Automatically include the workdir as read-write.
  bool include_workdir = 1;
  // Read-only directory allow list.
  repeated string read_only = 2;
  // Read-write directory allow list.
  repeated string read_write = 3;
}

// Landlock policy configuration.
message LandlockPolicy {
  // Compatibility mode (e.g. "best_effort", "hard_requirement").
  string compatibility = 1;
}

// Process execution policy.
message ProcessPolicy {
  // User name to run the sandboxed process as.
  string run_as_user = 1;
  // Group name to run the sandboxed process as.
  string run_as_group = 2;
}

// A named network access policy rule.
message NetworkPolicyRule {
  // Human-readable name for this policy rule.
  string name = 1;
  // Allowed endpoint (host:port) pairs.
  repeated NetworkEndpoint endpoints = 2;
  // Allowed binary identities.
  repeated NetworkBinary binaries = 3;
}

// A reusable middleware config selected for admitted egress by host.
message NetworkMiddlewareConfig {
  // Human-readable name for this middleware config.
  string name = 1;
  // Built-in middleware name or operator-owned registration name.
  string middleware = 2;
  // Service-specific configuration.
  google.protobuf.Struct config = 3;
  // Failure behavior: "fail_closed" (default) or "fail_open".
  string on_error = 4;
  // Host selector controlling which admitted destinations use this config.
  MiddlewareEndpointSelector endpoints = 5;
  // Execution order. Values must be unique within a policy; lower values run first.
  int32 order = 6;
}

// Host selector controlling which admitted destinations use a middleware config.
message MiddlewareEndpointSelector {
  // Exact host or DNS glob patterns included in the selection. Include and
  // exclude accept at most 32 combined patterns.
  repeated string include = 1;
  // Exact host or DNS glob patterns removed from the selection.
  // Exclusions take precedence over inclusions.
  repeated string exclude = 2;
}

// A network endpoint (host + port) with optional L7 inspection config.
message NetworkEndpoint {
  // Hostname or host glob pattern. Exact match is case-insensitive.
  // Glob patterns use "." as delimiter: "*.example.com" matches a single
  // subdomain label, "**.example.com" matches across labels.
  string host = 1;
  // Single port (backwards compat). Use `ports` for multiple ports.
  // Mutually exclusive with `ports` — if both are set, `ports` takes precedence.
  uint32 port = 2;
  // Application protocol for L7 inspection: "rest", "websocket", "graphql", "sql", or "" (L4-only).
  string protocol = 3;
  // TLS handling: "terminate" or "passthrough" (default).
  string tls = 4;
  // Enforcement mode: "enforce" or "audit" (default).
  string enforcement = 5;
  // Access preset shorthand: "read-only", "read-write", "full".
  // Mutually exclusive with rules.
  string access = 6;
  // Explicit L7 rules (mutually exclusive with access).
  repeated L7Rule rules = 7;
  // Allowed resolved IP addresses or CIDR ranges for this endpoint.
  // When non-empty, the SSRF internal-IP check is replaced by an allowlist check:
  //   - If host is also set: domain must resolve to an IP in this list.
  //   - If host is empty: any domain is allowed as long as it resolves to an IP in this list.
  // Supports exact IPs ("10.0.5.20") and CIDR notation ("10.0.5.0/24").
  // Loopback (127.0.0.0/8) and link-local (169.254.0.0/16) are always blocked
  // regardless of this field.
  repeated string allowed_ips = 8;
  // Multiple ports. When non-empty, this endpoint covers all listed ports.
  // If `port` is set and `ports` is empty, `port` is normalized to `ports: [port]`.
  // If both are set, `ports` takes precedence.
  repeated uint32 ports = 9;
  // Explicit L7 deny rules. When present, requests matching any deny rule
  // are blocked even if they match an allow rule or access preset.
  // Deny rules take precedence over allow rules.
  repeated L7DenyRule deny_rules = 10;
  // When true, percent-encoded '/' (%2F) is preserved in path segments
  // rather than rejected by the L7 path canonicalizer. Required for
  // upstreams like GitLab that embed %2F in namespaced resource paths.
  // Defaults to false (strict).
  bool allow_encoded_slash = 11;
  // GraphQL persisted-query behavior for hash-only/saved-query requests:
  // "deny" (default) or "allow_registered".
  string persisted_queries = 12;
  // Trusted GraphQL persisted-query registry keyed by hash or service-specific ID.
  // Only used when persisted_queries is "allow_registered".
  map<string, GraphqlOperation> graphql_persisted_queries = 13;
  // Maximum GraphQL request body bytes to buffer for inspection.
  // Defaults to 65536 when unset.
  uint32 graphql_max_body_bytes = 14;
  // Optional HTTP path glob that scopes this L7 endpoint on shared host:port APIs.
  // Example: use path "/graphql" for protocol "graphql" and "/repos/**" for
  // protocol "rest" when both surfaces live under api.example.com:443.
  // Empty means all paths.
  string path = 15;
  // When true on a "rest" endpoint, OpenShell rewrites credential placeholders
  // inside client-to-server WebSocket text messages after an allowed HTTP 101
  // upgrade. Defaults to false.
  bool websocket_credential_rewrite = 16;
  // When true on a "rest" endpoint, OpenShell rewrites credential placeholders
  // inside supported textual HTTP request bodies before forwarding upstream.
  // Defaults to false.
  bool request_body_credential_rewrite = 17;
  // Internal provenance marker for policy-advisor generated endpoints.
  // Advisor-proposed endpoints must not satisfy exact-host SSRF trust unless
  // they are converted through an explicit user-authored policy path.
  bool advisor_proposed = 18;
  // Proxy-side credential signing mode: "sigv4" for AWS SigV4 re-signing.
  // When set, the proxy strips the client's Authorization header and computes
  // a fresh SigV4 signature using real credentials from the provider.
  string credential_signing = 19;
  // AWS signing service name override. Required when credential_signing is
  // "sigv4" — e.g. "bedrock" for bedrock-runtime endpoints.
  string signing_service = 20;
  // AWS region override for SigV4 signing. When set, takes precedence over
  // hostname-based region extraction. Required for non-standard endpoints.
  string signing_region = 21;
  // Maximum JSON-RPC-over-HTTP request body bytes to buffer for inspection.
  // Defaults to 65536 when unset.
  uint32 json_rpc_max_body_bytes = 22;
  // MCP-only policy and inspection options. Only used when protocol is "mcp".
  McpOptions mcp = 23;
}

// MCP options are grouped so MCP-specific policy can grow without adding more
// top-level NetworkEndpoint fields. Current enforcement targets the active
// 2025-11-25 Streamable HTTP/tools behavior, while preserving space for
// version-profile policy if OpenShell adopts 2026-07-28 draft behavior later.
//
// Planned policy extensions should use OpenShell-owned static definitions for
// MCP method/version profiles rather than treating dependency enums as the
// policy contract. Candidate profile checks include request metadata/header
// validation, response/SSE introspection, trusted annotation handling,
// resultType/cache metadata validation, x-mcp-header tool-definition checks,
// and subscriptions/listen handling.
//
// Sources:
// - https://modelcontextprotocol.io/specification/2025-11-25/server/tools
// - https://modelcontextprotocol.io/specification/draft/changelog
// - https://modelcontextprotocol.io/specification/draft/basic/transports/streamable-http
// - https://modelcontextprotocol.io/specification/draft/server/tools
message McpOptions {
  // Hardening boundary for tools/call params.name. When unset or true, the
  // supervisor enforces the MCP recommended tool-name syntax
  // ^[A-Za-z0-9_.-]{1,128}$ before policy evaluation. Set false only for
  // compatibility with servers that intentionally use non-recommended names.
  //
  // Source:
  // - https://modelcontextprotocol.io/specification/2025-11-25/server/tools#tool-names
  optional bool strict_tool_names = 1;
  // Method-layer default for MCP endpoints. When true, OpenShell allows parsed
  // MCP-family methods at the method layer unless a tool-name policy narrows
  // tools/call. When unset or false, explicit method rules are required.
  optional bool allow_all_known_mcp_methods = 2;
}

// Trusted GraphQL operation classification.
message GraphqlOperation {
  // Operation type: "query", "mutation", or "subscription".
  string operation_type = 1;
  // Operation name, if known.
  string operation_name = 2;
  // Root field names selected by the operation.
  repeated string fields = 3;
}

// An L7 deny rule that blocks specific requests.
// Mirrors L7Allow — same fields, same matching semantics, inverted effect.
// Deny rules are evaluated after allow rules and take precedence.
message L7DenyRule {
  // Protocol method: HTTP method (REST/WebSocket), JSON-RPC method name, or
  // "*" for any when supported by the protocol.
  string method = 1;
  // URL path glob pattern (REST): "/repos/*/pulls/*/reviews", "**" for any.
  string path = 2;
  // SQL command (SQL): SELECT, INSERT, etc. or "*" for any.
  string command = 3;
  // Query parameter matcher map (REST).
  // Same semantics as L7Allow.query.
  map<string, L7QueryMatcher> query = 4;
  // GraphQL operation type: "query", "mutation", "subscription", or "*" for any.
  string operation_type = 5;
  // GraphQL operation name glob. "*" matches any operation name.
  string operation_name = 6;
  // GraphQL root field globs. Deny rules match when any selected root field
  // matches any configured glob.
  repeated string fields = 7;
  reserved 8;
  // MCP params matcher map. Currently only params.name is supported for
  // tools/call filtering. Generic protocol "json-rpc" rejects params matchers.
  map<string, L7QueryMatcher> params = 9;
}

// An L7 policy rule (allow-only).
message L7Rule {
  L7Allow allow = 1;
}

// Allowed action definition for L7 rules.
message L7Allow {
  // Protocol method: HTTP method (REST/WebSocket), JSON-RPC method name, or
  // "*" for any when supported by the protocol.
  string method = 1;
  // URL path glob pattern (REST): "/repos/**", "**" for any.
  string path = 2;
  // SQL command (SQL): SELECT, INSERT, etc. or "*" for any.
  string command = 3;
  // Query parameter matcher map (REST).
  // Key is the decoded query parameter name (case-sensitive).
  // Value supports either a single glob (`glob`) or a list (`any`).
  map<string, L7QueryMatcher> query = 4;
  // GraphQL operation type: "query", "mutation", "subscription", or "*" for any.
  string operation_type = 5;
  // GraphQL operation name glob. "*" matches any operation name.
  string operation_name = 6;
  // GraphQL root field globs. Allow rules match only when every selected root
  // field matches one of the configured globs. Omit to match all fields.
  repeated string fields = 7;
  reserved 8;
  // MCP params matcher map. Currently only params.name is supported for
  // tools/call filtering. Generic protocol "json-rpc" rejects params matchers.
  map<string, L7QueryMatcher> params = 9;
}

// Query value matcher for one query parameter key.
message L7QueryMatcher {
  // Single glob pattern.
  string glob = 1;
  // Any-of glob patterns.
  repeated string any = 2;
}

// A binary identity for network policy matching.
message NetworkBinary {
  string path = 1;
  // Deprecated: the harness concept has been removed. This field is ignored.
  bool harness = 2 [deprecated = true];
}

// Request to get sandbox settings by sandbox ID.
message GetSandboxConfigRequest {
  // The sandbox ID.
  string sandbox_id = 1;
}

// Request to get gateway-global settings.
message GetGatewayConfigRequest {}

// Response containing gateway-global settings.
message GetGatewayConfigResponse {
  // Gateway-global settings map excluding the reserved policy key.
  // Registered keys without a configured value are returned with an empty SettingValue.
  map<string, SettingValue> settings = 1;
  // Monotonically increasing revision for gateway-global settings.
  uint64 settings_revision = 2;
}

// Scope that currently controls a setting.
enum SettingScope {
  SETTING_SCOPE_UNSPECIFIED = 0;
  SETTING_SCOPE_SANDBOX = 1;
  SETTING_SCOPE_GLOBAL = 2;
}

// Type-aware setting value for sandbox/gateway settings.
message SettingValue {
  oneof value {
    string string_value = 1;
    bool bool_value = 2;
    int64 int_value = 3;
    bytes bytes_value = 4;
  }
}

// Effective setting value and the scope it was resolved from.
message EffectiveSetting {
  SettingValue value = 1;
  SettingScope scope = 2;
}

// Source used for the policy payload in GetSandboxConfigResponse.
enum PolicySource {
  POLICY_SOURCE_UNSPECIFIED = 0;
  POLICY_SOURCE_SANDBOX = 1;
  POLICY_SOURCE_GLOBAL = 2;
}

// Response containing effective sandbox settings and policy.
message GetSandboxConfigResponse {
  // The sandbox policy configuration.
  SandboxPolicy policy = 1;
  // Current policy version (monotonically increasing per sandbox).
  uint32 version = 2;
  // SHA-256 hash of the serialized policy payload.
  string policy_hash = 3;
  // Effective settings resolved for this sandbox, excluding the reserved policy key.
  // Registered keys without a configured value are returned with an empty EffectiveSetting.value.
  map<string, EffectiveSetting> settings = 4;
  // Fingerprint for effective config (policy + settings). Changes when any effective input changes.
  uint64 config_revision = 5;
  // Source of the policy payload for this response.
  PolicySource policy_source = 6;
  // When policy_source is GLOBAL, the version of the global policy revision.
  // Zero when no global policy is active or when policy_source is SANDBOX.
  uint32 global_policy_version = 7;
  // Fingerprint for provider credential inputs attached to this sandbox.
  // Changes when attached provider names or attached provider records change.
  uint64 provider_env_revision = 8;
  // Operator-registered supervisor middleware services required by the
  // effective policy. Built-in middleware is not included.
  repeated SupervisorMiddlewareService supervisor_middleware_services = 9;
  // Workspace the sandbox belongs to. Allows the supervisor to learn its
  // workspace context for subsequent workspace-scoped RPCs.
  string workspace = 10;
}

// Connection details for one operator-registered supervisor middleware service.
// V1 supports plaintext and server-authenticated TLS gRPC.
message SupervisorMiddlewareService {
  // Operator-owned registration name used by policy attachments and diagnostics.
  string name = 1;
  // gRPC endpoint reachable from the sandbox supervisor.
  string grpc_endpoint = 2;
  // Operator-owned body limit applied to every binding exposed by the service.
  uint64 max_body_bytes = 3;
  // Default RPC timeout for this service. Empty uses the platform default of
  // 500ms. Values use an integer with an `ms` or `s` suffix and must be
  // between 10ms and 30s.
  string timeout = 4;
}