| 1 | //! Run credentials: the least-privilege tokens a sandbox works with. |
| 2 | //! |
| 3 | //! Every sandbox run gets its own tokens, bound to the run, its repository |
| 4 | //! (and the pull request's fork), what that kind of run needs to do, and an |
| 5 | //! expiry no later than the run's timeout. Each carries a composite |
| 6 | //! identity: an agent acting on behalf of the person who started the work. |
| 7 | //! What it may do is the intersection of the two: the run's scope, and what |
| 8 | //! that person may do right now. |
| 9 | //! |
| 10 | //! The policy lives here, as pure functions, so that identity (which mints |
| 11 | //! the tokens), the API (which serves REST and MCP) and repos (which serves |
| 12 | //! git) all enforce the same rules, and so the rules can be tested. |
| 13 | |
| 14 | use serde::{Deserialize, Serialize}; |
| 15 | |
| 16 | use crate::identity::AgentScope; |
| 17 | use crate::repos::RepoPath; |
| 18 | use crate::access::{BasePermission, RepoGrant, RepoRole}; |
| 19 | use crate::{Membership, PrincipalKind, Role, User}; |
| 20 | |
| 21 | /// What a run does, as far as its credentials are concerned. The same names |
| 22 | /// as [`crate::agents::RunKind`], plus `deploy`, a build of one commit. |
| 23 | #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)] |
| 24 | #[serde(rename_all = "snake_case")] |
| 25 | pub enum RunCredentialKind { |
| 26 | Implement, |
| 27 | Revise, |
| 28 | Review, |
| 29 | Answer, |
| 30 | Update, |
| 31 | Plan, |
| 32 | Checks, |
| 33 | Queue, |
| 34 | Mergecheck, |
| 35 | Deploy, |
| 36 | /// A security update: raising one package's version in its lockfiles |
| 37 | /// and pushing that to a branch of its own. Not an agent. |
| 38 | Bump, |
| 39 | } |
| 40 | |
| 41 | impl RunCredentialKind { |
| 42 | pub const ALL: [RunCredentialKind; 11] = [ |
| 43 | RunCredentialKind::Implement, |
| 44 | RunCredentialKind::Revise, |
| 45 | RunCredentialKind::Review, |
| 46 | RunCredentialKind::Answer, |
| 47 | RunCredentialKind::Update, |
| 48 | RunCredentialKind::Plan, |
| 49 | RunCredentialKind::Checks, |
| 50 | RunCredentialKind::Queue, |
| 51 | RunCredentialKind::Mergecheck, |
| 52 | RunCredentialKind::Deploy, |
| 53 | RunCredentialKind::Bump, |
| 54 | ]; |
| 55 | |
| 56 | pub fn as_str(self) -> &'static str { |
| 57 | match self { |
| 58 | RunCredentialKind::Implement => "implement", |
| 59 | RunCredentialKind::Revise => "revise", |
| 60 | RunCredentialKind::Review => "review", |
| 61 | RunCredentialKind::Answer => "answer", |
| 62 | RunCredentialKind::Update => "update", |
| 63 | RunCredentialKind::Plan => "plan", |
| 64 | RunCredentialKind::Checks => "checks", |
| 65 | RunCredentialKind::Queue => "queue", |
| 66 | RunCredentialKind::Mergecheck => "mergecheck", |
| 67 | RunCredentialKind::Deploy => "deploy", |
| 68 | RunCredentialKind::Bump => "bump", |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | /// Whether the run works on one pull request, whose session and |
| 73 | /// readiness it reports. |
| 74 | fn works_on_a_pull(self) -> bool { |
| 75 | matches!( |
| 76 | self, |
| 77 | RunCredentialKind::Implement |
| 78 | | RunCredentialKind::Revise |
| 79 | | RunCredentialKind::Answer |
| 80 | | RunCredentialKind::Update |
| 81 | ) |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | /// Which part of a sandbox a credential is for. |
| 86 | #[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)] |
| 87 | #[serde(rename_all = "snake_case")] |
| 88 | pub enum CredentialUse { |
| 89 | /// g1t's runner: cloning, pushing the result, recording the session. |
| 90 | /// It acts as the person downstream, so that what it pushes and records |
| 91 | /// is theirs, within the run's scope. |
| 92 | Runner, |
| 93 | /// The agent's own tools, over MCP. It acts as the agent. |
| 94 | Tools, |
| 95 | } |
| 96 | |
| 97 | impl CredentialUse { |
| 98 | pub fn as_str(self) -> &'static str { |
| 99 | match self { |
| 100 | CredentialUse::Runner => "runner", |
| 101 | CredentialUse::Tools => "tools", |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /// A repository a run may push to, and the one branch, if only one. |
| 107 | #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)] |
| 108 | pub struct GitGrant { |
| 109 | pub repo: RepoPath, |
| 110 | /// Null: any branch. A pull request's fork is its own repository, so |
| 111 | /// the whole of it is the pull request's. |
| 112 | #[serde(default)] |
| 113 | pub branch: Option<String>, |
| 114 | } |
| 115 | |
| 116 | /// What binds an agent's token to one run. Absent on agent tokens made |
| 117 | /// before run credentials, which keep working for the API only. |
| 118 | #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)] |
| 119 | #[serde(rename_all = "camelCase")] |
| 120 | pub struct RunBinding { |
| 121 | pub kind: RunCredentialKind, |
| 122 | #[serde(rename = "use")] |
| 123 | pub usage: CredentialUse, |
| 124 | /// The agent run, once the sandbox has recorded it. |
| 125 | #[serde(default)] |
| 126 | pub run_id: Option<String>, |
| 127 | /// The pull request the run works on, for the kinds that work on one. |
| 128 | #[serde(default)] |
| 129 | pub number: Option<u32>, |
| 130 | /// The agent's name, such as `g1t`. |
| 131 | pub agent: String, |
| 132 | /// Repositories it may clone and fetch, besides those it may push to. |
| 133 | #[serde(default)] |
| 134 | pub read: Vec<RepoPath>, |
| 135 | /// Where it may push. |
| 136 | #[serde(default)] |
| 137 | pub push: Vec<GitGrant>, |
| 138 | /// g1t's own run (a security update, an agent g1t put on one): the |
| 139 | /// credential belongs to the workspace, and acts on behalf of g1t |
| 140 | /// (`system::ID`), so what it does is g1t's, and the pull request g1t |
| 141 | /// opened, and its working copy, are its own. |
| 142 | #[serde(default, skip_serializing_if = "std::ops::Not::not")] |
| 143 | pub system: bool, |
| 144 | } |
| 145 | |
| 146 | /// A person, by id and name. |
| 147 | #[derive(Clone, Debug, Default, PartialEq, Eq, Serialize, Deserialize)] |
| 148 | pub struct Principal { |
| 149 | pub id: String, |
| 150 | pub username: String, |
| 151 | } |
| 152 | |
| 153 | impl From<&User> for Principal { |
| 154 | fn from(user: &User) -> Self { |
| 155 | Principal { |
| 156 | id: user.id.clone(), |
| 157 | username: user.username.clone(), |
| 158 | } |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /// Set on a [`User`] resolved from an agent's token: the composite |
| 163 | /// identity, "g1t on behalf of syntaqx", and what it may do. |
| 164 | #[derive(Clone, Debug, Serialize, Deserialize)] |
| 165 | #[serde(rename_all = "camelCase")] |
| 166 | pub struct Acting { |
| 167 | /// The token's id, as audit entries name it. |
| 168 | pub credential_id: String, |
| 169 | pub agent: String, |
| 170 | pub on_behalf_of: Principal, |
| 171 | pub scope: AgentScope, |
| 172 | } |
| 173 | |
| 174 | impl Acting { |
| 175 | pub fn run(&self) -> Option<&RunBinding> { |
| 176 | self.scope.run.as_ref() |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | /// `create_run_credential`: a token for one sandbox run. It acts as |
| 181 | /// `agent` on behalf of `on_behalf_of`, can do only what `kind` and `usage` |
| 182 | /// allow in `repo`, and expires after `ttl_seconds`, which should be the |
| 183 | /// run's timeout. Returns `CreatedAccessToken`. |
| 184 | #[derive(Clone, Debug, Serialize, Deserialize)] |
| 185 | #[serde(rename_all = "camelCase")] |
| 186 | pub struct CreateRunCredentialArgs { |
| 187 | pub on_behalf_of: User, |
| 188 | pub repo: RepoPath, |
| 189 | pub kind: RunCredentialKind, |
| 190 | #[serde(rename = "use")] |
| 191 | pub usage: CredentialUse, |
| 192 | #[serde(default)] |
| 193 | pub number: Option<u32>, |
| 194 | #[serde(default)] |
| 195 | pub read: Vec<RepoPath>, |
| 196 | #[serde(default)] |
| 197 | pub push: Vec<GitGrant>, |
| 198 | pub ttl_seconds: u64, |
| 199 | /// Defaults to `g1t`. |
| 200 | #[serde(default)] |
| 201 | pub agent: Option<String>, |
| 202 | } |
| 203 | |
| 204 | /// `bind_run_credentials`: ties tokens, named by the SHA-256 of their |
| 205 | /// text in hex, to the agent run their sandbox recorded. Returns how many. |
| 206 | #[derive(Clone, Debug, Serialize, Deserialize)] |
| 207 | #[serde(rename_all = "camelCase")] |
| 208 | pub struct BindRunCredentialsArgs { |
| 209 | pub token_hashes: Vec<String>, |
| 210 | pub run_id: String, |
| 211 | } |
| 212 | |
| 213 | /// `revoke_run_credentials`: ends tokens when their sandbox stops, by hash |
| 214 | /// or by run. Only run credentials are touched, never a token a person |
| 215 | /// made. Returns how many. |
| 216 | #[derive(Clone, Debug, Default, Serialize, Deserialize)] |
| 217 | #[serde(rename_all = "camelCase")] |
| 218 | pub struct RevokeRunCredentialsArgs { |
| 219 | #[serde(default)] |
| 220 | pub token_hashes: Vec<String>, |
| 221 | #[serde(default)] |
| 222 | pub run_id: Option<String>, |
| 223 | } |
| 224 | |
| 225 | // --- Policy -------------------------------------------------------------- |
| 226 | |
| 227 | /// Operations that only read. |
| 228 | pub const READ_OPERATIONS: &[&str] = &[ |
| 229 | "whoami", |
| 230 | "get_usage", |
| 231 | "get_budget", |
| 232 | "get_ai_credit", |
| 233 | "list_invoices", |
| 234 | "get_billing_details", |
| 235 | "list_repos", |
| 236 | "get_repo", |
| 237 | "list_projects", |
| 238 | "get_project", |
| 239 | "list_deleted_repos", |
| 240 | "list_collaborators", |
| 241 | "get_collaborator_permission", |
| 242 | "list_repo_invitations", |
| 243 | "list_my_repo_invitations", |
| 244 | "list_outside_collaborators", |
| 245 | "list_teams", |
| 246 | "get_team", |
| 247 | "list_team_members", |
| 248 | "list_child_teams", |
| 249 | "list_team_repos", |
| 250 | "list_user_teams", |
| 251 | "get_codeowners_errors", |
| 252 | "get_repo_settings", |
| 253 | "list_check_names", |
| 254 | "get_merge_queue", |
| 255 | "recall", |
| 256 | "list_issues", |
| 257 | "get_issue", |
| 258 | "get_plan", |
| 259 | "list_labels", |
| 260 | "list_issue_labels", |
| 261 | "list_milestones", |
| 262 | "get_milestone", |
| 263 | "list_pull_requests", |
| 264 | "get_pull_request", |
| 265 | "read_session", |
| 266 | "get_pull_request_changes", |
| 267 | "list_events", |
| 268 | "get_context", |
| 269 | "search_context", |
| 270 | "get_entity", |
| 271 | "search", |
| 272 | "list_workflows", |
| 273 | "list_workflow_runs", |
| 274 | "get_workflow_run", |
| 275 | "get_job_logs", |
| 276 | "get_pending_deployments", |
| 277 | "get_workflow_permissions", |
| 278 | "get_fork_pr_approval", |
| 279 | "list_commit_statuses", |
| 280 | "get_combined_status", |
| 281 | "list_check_runs_for_ref", |
| 282 | "get_check_run", |
| 283 | "list_check_run_annotations", |
| 284 | "list_check_suites_for_ref", |
| 285 | "get_check_suite", |
| 286 | "list_integrations", |
| 287 | "get_model_routes", |
| 288 | "list_webhooks", |
| 289 | "list_webhook_deliveries", |
| 290 | "list_actions_secrets", |
| 291 | "list_actions_variables", |
| 292 | "list_security_alerts", |
| 293 | "list_secret_scanning_alerts", |
| 294 | "get_secret_scanning_alert", |
| 295 | "list_secret_scanning_locations", |
| 296 | "list_bypass_requests", |
| 297 | "list_custom_patterns", |
| 298 | "list_code_scanning_alerts", |
| 299 | "get_code_scanning_alert", |
| 300 | "list_code_scanning_analyses", |
| 301 | "get_sarif_upload", |
| 302 | "list_vulnerability_alerts", |
| 303 | "get_vulnerability_alert", |
| 304 | "get_dependency_graph", |
| 305 | "get_sbom", |
| 306 | "compare_dependencies", |
| 307 | "get_security_settings", |
| 308 | "get_workspace_security_settings", |
| 309 | "get_security_overview", |
| 310 | "list_notifications", |
| 311 | "get_notification_thread", |
| 312 | "get_thread_subscription", |
| 313 | "get_repo_subscription", |
| 314 | "list_watched_repos", |
| 315 | "list_pinned_projects", |
| 316 | ]; |
| 317 | |
| 318 | /// What no agent's token may ever do, whatever its scope says: workspaces, |
| 319 | /// repositories' settings, members, tokens, billing, integrations, |
| 320 | /// webhooks, secrets, workflows' controls, merging, and putting more agents |
| 321 | /// to work. |
| 322 | pub const NEVER: &[&str] = &[ |
| 323 | // Billing is people's: agents never spend or change it. |
| 324 | "set_budget", |
| 325 | "buy_ai_credit", |
| 326 | "create_workspace", |
| 327 | "delete_workspace", |
| 328 | "update_workspace", |
| 329 | "transfer_repo", |
| 330 | "create_repo", |
| 331 | "update_repo", |
| 332 | "update_project", |
| 333 | "delete_repo", |
| 334 | "list_deleted_repos", |
| 335 | "restore_repo", |
| 336 | "purge_repo", |
| 337 | "rename_repo", |
| 338 | "archive_repo", |
| 339 | "unarchive_repo", |
| 340 | "set_repo_visibility", |
| 341 | "rename_branch", |
| 342 | "update_repo_settings", |
| 343 | "merge_pull_request", |
| 344 | "assign_issue", |
| 345 | "plan_work", |
| 346 | "apply_plan", |
| 347 | "import_issue", |
| 348 | "list_integrations", |
| 349 | "connect_integration", |
| 350 | "update_integration", |
| 351 | "disconnect_integration", |
| 352 | "test_integration", |
| 353 | "get_model_routes", |
| 354 | "set_model_routes", |
| 355 | "list_webhooks", |
| 356 | "create_webhook", |
| 357 | "update_webhook", |
| 358 | "delete_webhook", |
| 359 | "ping_webhook", |
| 360 | "list_webhook_deliveries", |
| 361 | "redeliver_webhook", |
| 362 | "dispatch_workflow", |
| 363 | "cancel_workflow_run", |
| 364 | "rerun_workflow_run", |
| 365 | "update_workflow", |
| 366 | // Nor lets runs or deployments through, or changes what holds them. |
| 367 | "approve_workflow_run", |
| 368 | "review_pending_deployments", |
| 369 | "update_environment", |
| 370 | "delete_environment", |
| 371 | "set_workflow_permissions", |
| 372 | "set_fork_pr_approval", |
| 373 | "create_repository_dispatch", |
| 374 | "set_workspace_workflow_permissions", |
| 375 | // An agent never reports checks on its own work, nor asks for them |
| 376 | // to run again: what checks say is the integrations' to say. |
| 377 | "create_commit_status", |
| 378 | "create_check_run", |
| 379 | "update_check_run", |
| 380 | "rerequest_check_run", |
| 381 | "rerequest_check_suite", |
| 382 | "list_actions_secrets", |
| 383 | "set_actions_secret", |
| 384 | "delete_actions_secret", |
| 385 | "list_actions_variables", |
| 386 | "set_actions_variable", |
| 387 | "delete_actions_variable", |
| 388 | "list_collaborators", |
| 389 | "get_collaborator_permission", |
| 390 | "add_collaborator", |
| 391 | "update_collaborator", |
| 392 | "remove_collaborator", |
| 393 | "list_repo_invitations", |
| 394 | "revoke_repo_invitation", |
| 395 | "list_my_repo_invitations", |
| 396 | "accept_repo_invitation", |
| 397 | "decline_repo_invitation", |
| 398 | "set_base_permission", |
| 399 | "list_outside_collaborators", |
| 400 | // Teams: who is in which, and what they reach, is for people. |
| 401 | "create_team", |
| 402 | "update_team", |
| 403 | "delete_team", |
| 404 | "set_team_member", |
| 405 | "remove_team_member", |
| 406 | "set_team_repo", |
| 407 | "remove_team_repo", |
| 408 | "set_team_review_assignment", |
| 409 | // Dismissing a secret lets it through push protection. |
| 410 | "dismiss_security_alert", |
| 411 | "reopen_security_alert", |
| 412 | // Nor any other decision about security: closing or reopening an |
| 413 | // alert, pushing past push protection or deciding who may, changing |
| 414 | // what is looked for or when checks fail, or putting more agents to |
| 415 | // work. An agent fixes what it finds in its own pull request. |
| 416 | "update_secret_scanning_alert", |
| 417 | "bypass_push_protection", |
| 418 | "review_bypass_request", |
| 419 | "create_custom_pattern", |
| 420 | "update_custom_pattern", |
| 421 | "delete_custom_pattern", |
| 422 | "update_code_scanning_alert", |
| 423 | "update_vulnerability_alert", |
| 424 | "fix_security_alert", |
| 425 | "update_security_settings", |
| 426 | "update_workspace_security_settings", |
| 427 | // A person's own inbox: g1t's agents act as g1t, which has none. |
| 428 | "list_notifications", |
| 429 | "get_notification_thread", |
| 430 | "mark_notifications_read", |
| 431 | "mark_thread_read", |
| 432 | "mark_thread_done", |
| 433 | "save_thread", |
| 434 | "snooze_thread", |
| 435 | "get_thread_subscription", |
| 436 | "set_thread_subscription", |
| 437 | "delete_thread_subscription", |
| 438 | "get_repo_subscription", |
| 439 | "set_repo_subscription", |
| 440 | "delete_repo_subscription", |
| 441 | "list_watched_repos", |
| 442 | // Pins are a person's own, as the inbox is. |
| 443 | "list_pinned_projects", |
| 444 | "pin_project", |
| 445 | "unpin_project", |
| 446 | "reorder_pinned_projects", |
| 447 | // Deleting packages and deciding who may use them is for people: an |
| 448 | // agent publishes its repository's packages and never deletes them. |
| 449 | "update_package", |
| 450 | "link_package", |
| 451 | "unlink_package", |
| 452 | "set_package_access", |
| 453 | "remove_package_access", |
| 454 | "set_package_actions_access", |
| 455 | "remove_package_actions_access", |
| 456 | "delete_package", |
| 457 | "restore_package", |
| 458 | "delete_package_version", |
| 459 | "restore_package_version", |
| 460 | ]; |
| 461 | |
| 462 | /// Reading what an agent needs to know about its repository. |
| 463 | const TOOLS_READ: &[&str] = &[ |
| 464 | "get_repo", |
| 465 | "list_issues", |
| 466 | "get_issue", |
| 467 | "list_labels", |
| 468 | "list_issue_labels", |
| 469 | "list_milestones", |
| 470 | "get_milestone", |
| 471 | "list_pull_requests", |
| 472 | "get_pull_request", |
| 473 | "get_pull_request_changes", |
| 474 | "read_session", |
| 475 | "get_merge_queue", |
| 476 | "list_events", |
| 477 | "recall", |
| 478 | "search_context", |
| 479 | "get_entity", |
| 480 | "search", |
| 481 | "list_workflows", |
| 482 | "list_workflow_runs", |
| 483 | "get_workflow_run", |
| 484 | "get_job_logs", |
| 485 | "get_pending_deployments", |
| 486 | "get_workflow_permissions", |
| 487 | "get_fork_pr_approval", |
| 488 | "list_commit_statuses", |
| 489 | "get_combined_status", |
| 490 | "list_check_runs_for_ref", |
| 491 | "get_check_run", |
| 492 | "list_check_run_annotations", |
| 493 | "list_check_suites_for_ref", |
| 494 | "get_check_suite", |
| 495 | ]; |
| 496 | |
| 497 | pub fn is_read(operation: &str) -> bool { |
| 498 | READ_OPERATIONS.contains(&operation) |
| 499 | } |
| 500 | |
| 501 | /// The API and MCP operations a run of `kind` may use with a credential |
| 502 | /// for `usage`. Git is separate: see [`decide_git`]. |
| 503 | pub fn operations_for(kind: RunCredentialKind, usage: CredentialUse) -> Vec<&'static str> { |
| 504 | use RunCredentialKind as K; |
| 505 | let mut operations: Vec<&'static str> = Vec::new(); |
| 506 | match usage { |
| 507 | CredentialUse::Runner => { |
| 508 | if kind.works_on_a_pull() { |
| 509 | operations.extend(["get_repo", "get_pull_request", "record_session"]); |
| 510 | } |
| 511 | if kind == K::Implement { |
| 512 | operations.push("mark_pull_request_ready"); |
| 513 | } |
| 514 | } |
| 515 | CredentialUse::Tools => match kind { |
| 516 | K::Implement | K::Revise | K::Answer => { |
| 517 | operations.extend(TOOLS_READ.iter().copied()); |
| 518 | operations.extend([ |
| 519 | "create_issue", |
| 520 | "add_comment", |
| 521 | "take_messages", |
| 522 | "remember", |
| 523 | "message_agent", |
| 524 | "answer_message", |
| 525 | "get_context", |
| 526 | ]); |
| 527 | } |
| 528 | K::Review => { |
| 529 | operations.extend(TOOLS_READ.iter().copied()); |
| 530 | operations.extend(["add_comment", "review_pull_request", "get_context"]); |
| 531 | } |
| 532 | K::Plan => { |
| 533 | operations.extend(TOOLS_READ.iter().copied()); |
| 534 | operations.extend(["create_issue", "get_context"]); |
| 535 | } |
| 536 | K::Update => operations.extend(TOOLS_READ.iter().copied()), |
| 537 | K::Checks | K::Queue | K::Mergecheck | K::Deploy | K::Bump => {} |
| 538 | }, |
| 539 | } |
| 540 | operations |
| 541 | } |
| 542 | |
| 543 | /// What a run's credential may do, in the scope vocabulary that access |
| 544 | /// tokens use (see [`crate::scopes`]): the scopes of its operations, and |
| 545 | /// for a runner, git's. Its operations, its repository and its run still |
| 546 | /// bound it more tightly than these scopes say. |
| 547 | pub fn run_scopes(kind: RunCredentialKind, usage: CredentialUse) -> Vec<crate::scopes::Scope> { |
| 548 | use crate::scopes::{Scope, normalize, scope_for}; |
| 549 | let mut scopes: Vec<Scope> = operations_for(kind, usage) |
| 550 | .into_iter() |
| 551 | .filter_map(scope_for) |
| 552 | .collect(); |
| 553 | if usage == CredentialUse::Runner { |
| 554 | scopes.push(Scope::CodeRead); |
| 555 | if matches!( |
| 556 | kind, |
| 557 | RunCredentialKind::Implement |
| 558 | | RunCredentialKind::Revise |
| 559 | | RunCredentialKind::Answer |
| 560 | | RunCredentialKind::Update |
| 561 | | RunCredentialKind::Bump |
| 562 | ) { |
| 563 | scopes.push(Scope::CodeWrite); |
| 564 | } |
| 565 | } |
| 566 | normalize(&mut scopes); |
| 567 | scopes |
| 568 | } |
| 569 | |
| 570 | /// Operations that change a pull request, which a runner may do only to |
| 571 | /// the pull request its run works on. |
| 572 | const PULL_WRITES: &[&str] = &["record_session", "mark_pull_request_ready"]; |
| 573 | |
| 574 | /// Whether something was allowed, and the rule that decided it. |
| 575 | #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)] |
| 576 | pub struct Decision { |
| 577 | pub allowed: bool, |
| 578 | /// A short, stable name: `run:implement/tools`, `never`, |
| 579 | /// `scope:repository` and so on. Shown in the audit log. |
| 580 | pub rule: String, |
| 581 | /// Why it was refused, for the caller. |
| 582 | #[serde(default, skip_serializing_if = "Option::is_none")] |
| 583 | pub reason: Option<String>, |
| 584 | } |
| 585 | |
| 586 | impl Decision { |
| 587 | pub fn allow(rule: impl Into<String>) -> Self { |
| 588 | Decision { |
| 589 | allowed: true, |
| 590 | rule: rule.into(), |
| 591 | reason: None, |
| 592 | } |
| 593 | } |
| 594 | |
| 595 | pub fn deny(rule: impl Into<String>, reason: impl Into<String>) -> Self { |
| 596 | Decision { |
| 597 | allowed: false, |
| 598 | rule: rule.into(), |
| 599 | reason: Some(reason.into()), |
| 600 | } |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | fn same_repo(a: &RepoPath, b: &RepoPath) -> bool { |
| 605 | a.namespace.eq_ignore_ascii_case(&b.namespace) && a.name.eq_ignore_ascii_case(&b.name) |
| 606 | } |
| 607 | |
| 608 | fn scope_rule(scope: &AgentScope) -> String { |
| 609 | match &scope.run { |
| 610 | Some(run) => format!("run:{}/{}", run.kind.as_str(), run.usage.as_str()), |
| 611 | None => "agent-token".to_owned(), |
| 612 | } |
| 613 | } |
| 614 | |
| 615 | /// Whether `user`, resolved from an agent's token with `scope`, may use |
| 616 | /// `operation`. `repo` is the repository the call names, if any, and |
| 617 | /// `needs_repo` whether the operation is about one; `number` the issue or |
| 618 | /// pull request it names. |
| 619 | pub fn decide_operation( |
| 620 | user: &User, |
| 621 | scope: &AgentScope, |
| 622 | operation: &str, |
| 623 | repo: Option<&RepoPath>, |
| 624 | needs_repo: bool, |
| 625 | number: Option<u32>, |
| 626 | ) -> Decision { |
| 627 | let who = "A g1t agent's token"; |
| 628 | if NEVER.contains(&operation) { |
| 629 | return Decision::deny( |
| 630 | "never", |
| 631 | format!( |
| 632 | "{who} can never use {operation}: settings, members, tokens, billing, integrations, webhooks, secrets and merging are for people." |
| 633 | ), |
| 634 | ); |
| 635 | } |
| 636 | if !scope.operations.iter().any(|name| name == operation) { |
| 637 | return Decision::deny( |
| 638 | "scope:operation", |
| 639 | format!("{who} for this run cannot use {operation}."), |
| 640 | ); |
| 641 | } |
| 642 | if needs_repo && !repo.is_some_and(|asked| same_repo(asked, &scope.repo)) { |
| 643 | return Decision::deny( |
| 644 | "scope:repository", |
| 645 | format!( |
| 646 | "{who} works in {}/{} only.", |
| 647 | scope.repo.namespace, scope.repo.name |
| 648 | ), |
| 649 | ); |
| 650 | } |
| 651 | // The intersection: the person it acts for must still be able to work |
| 652 | // in the repository's workspace, as a member or with a role on its |
| 653 | // repositories. What it may do in the repository itself is their |
| 654 | // role there, which services check (`access::can`). |
| 655 | if !crate::access::has_access_in(user, &scope.repo.namespace) { |
| 656 | return Decision::deny( |
| 657 | "on-behalf-of:membership", |
| 658 | format!( |
| 659 | "The person this agent works for is no longer a member of {}.", |
| 660 | scope.repo.namespace |
| 661 | ), |
| 662 | ); |
| 663 | } |
| 664 | if let Some(run) = &scope.run |
| 665 | && run.usage == CredentialUse::Runner |
| 666 | && PULL_WRITES.contains(&operation) |
| 667 | && run.number.is_some() |
| 668 | && number != run.number |
| 669 | { |
| 670 | return Decision::deny( |
| 671 | "scope:pull", |
| 672 | format!( |
| 673 | "{who} can change pull request #{} only.", |
| 674 | run.number.unwrap_or_default() |
| 675 | ), |
| 676 | ); |
| 677 | } |
| 678 | Decision::allow(scope_rule(scope)) |
| 679 | } |
| 680 | |
| 681 | /// Whether a run credential may clone or fetch (`write` false), or push to |
| 682 | /// (`write` true), the repository at `repo`. |
| 683 | pub fn decide_git(scope: &AgentScope, repo: &RepoPath, write: bool) -> Decision { |
| 684 | let Some(run) = scope |
| 685 | .run |
| 686 | .as_ref() |
| 687 | .filter(|run| run.usage == CredentialUse::Runner) |
| 688 | else { |
| 689 | return Decision::deny( |
| 690 | "git:not-a-run", |
| 691 | "A g1t agent's tools token cannot be used with git.", |
| 692 | ); |
| 693 | }; |
| 694 | let pushable = run.push.iter().any(|grant| same_repo(&grant.repo, repo)); |
| 695 | if write { |
| 696 | return if pushable { |
| 697 | Decision::allow(format!("{}:push", scope_rule(scope))) |
| 698 | } else { |
| 699 | Decision::deny( |
| 700 | "git:push", |
| 701 | format!( |
| 702 | "A {} run cannot push to {}/{}.", |
| 703 | run.kind.as_str(), |
| 704 | repo.namespace, |
| 705 | repo.name |
| 706 | ), |
| 707 | ) |
| 708 | }; |
| 709 | } |
| 710 | let readable = pushable |
| 711 | || same_repo(&scope.repo, repo) |
| 712 | || run.read.iter().any(|path| same_repo(path, repo)); |
| 713 | if readable { |
| 714 | Decision::allow(format!("{}:read", scope_rule(scope))) |
| 715 | } else { |
| 716 | Decision::deny( |
| 717 | "git:read", |
| 718 | format!( |
| 719 | "A {} run cannot read {}/{}.", |
| 720 | run.kind.as_str(), |
| 721 | repo.namespace, |
| 722 | repo.name |
| 723 | ), |
| 724 | ) |
| 725 | } |
| 726 | } |
| 727 | |
| 728 | /// Whether a push to `repo` is limited to certain branches, so that the |
| 729 | /// refs it moves have to be read and checked with [`decide_refs`]. |
| 730 | pub fn limits_branches(scope: &AgentScope, repo: &RepoPath) -> bool { |
| 731 | scope |
| 732 | .run |
| 733 | .iter() |
| 734 | .flat_map(|run| run.push.iter()) |
| 735 | .any(|grant| same_repo(&grant.repo, repo) && grant.branch.is_some()) |
| 736 | } |
| 737 | |
| 738 | /// Whether a push to `repo` may move `refs` (full refs, such as |
| 739 | /// `refs/heads/main`). Tags are never a run's to move. |
| 740 | pub fn decide_refs(scope: &AgentScope, repo: &RepoPath, refs: &[String]) -> Decision { |
| 741 | let repo_decision = decide_git(scope, repo, true); |
| 742 | if !repo_decision.allowed { |
| 743 | return repo_decision; |
| 744 | } |
| 745 | let grants: Vec<&GitGrant> = scope |
| 746 | .run |
| 747 | .iter() |
| 748 | .flat_map(|run| run.push.iter()) |
| 749 | .filter(|grant| same_repo(&grant.repo, repo)) |
| 750 | .collect(); |
| 751 | for git_ref in refs { |
| 752 | let Some(branch) = git_ref.strip_prefix("refs/heads/") else { |
| 753 | return Decision::deny("git:ref", format!("A run cannot push {git_ref}.")); |
| 754 | }; |
| 755 | let allowed = grants |
| 756 | .iter() |
| 757 | .any(|grant| grant.branch.as_deref().is_none_or(|only| only == branch)); |
| 758 | if !allowed { |
| 759 | return Decision::deny( |
| 760 | "git:ref", |
| 761 | format!( |
| 762 | "A run cannot push to {branch} in {}/{}.", |
| 763 | repo.namespace, repo.name |
| 764 | ), |
| 765 | ); |
| 766 | } |
| 767 | } |
| 768 | repo_decision |
| 769 | } |
| 770 | |
| 771 | /// The most an agent may be on a repository, whoever it works for: it |
| 772 | /// can push, merge and run, never change settings or who has access. |
| 773 | pub const AGENT_CEILING: RepoRole = RepoRole::Write; |
| 774 | |
| 775 | /// The memberships an agent working for `person` has: the run's |
| 776 | /// workspace, as a member, only if the person is in it now, with the |
| 777 | /// person's role on its repositories (an owner's Admin included) cut down |
| 778 | /// to [`AGENT_CEILING`]. |
| 779 | pub fn intersect(person: &[Membership], namespace: &str) -> Vec<Membership> { |
| 780 | let namespace = namespace.to_lowercase(); |
| 781 | person |
| 782 | .iter() |
| 783 | .filter(|membership| membership.slug == namespace) |
| 784 | .map(|membership| { |
| 785 | let base = match membership.role { |
| 786 | Role::Owner => BasePermission::Admin, |
| 787 | Role::Member => membership.base_permission.unwrap_or_default(), |
| 788 | }; |
| 789 | Membership { |
| 790 | role: Role::Member, |
| 791 | base_permission: Some(match base { |
| 792 | BasePermission::Admin => BasePermission::Write, |
| 793 | base => base, |
| 794 | }), |
| 795 | ..membership.clone() |
| 796 | } |
| 797 | }) |
| 798 | .collect() |
| 799 | } |
| 800 | |
| 801 | /// The repository grants an agent working for `person` has: those in the |
| 802 | /// run's workspace, each cut down to [`AGENT_CEILING`]. |
| 803 | pub fn intersect_grants(person: &[RepoGrant], namespace: &str) -> Vec<RepoGrant> { |
| 804 | let namespace = namespace.to_lowercase(); |
| 805 | person |
| 806 | .iter() |
| 807 | .filter(|grant| grant.workspace == namespace) |
| 808 | .map(|grant| RepoGrant { |
| 809 | role: grant.role.min(AGENT_CEILING), |
| 810 | ..grant.clone() |
| 811 | }) |
| 812 | .collect() |
| 813 | } |
| 814 | |
| 815 | /// Who a runner's credential acts as downstream: the person, with only the |
| 816 | /// agent's (already intersected) memberships. `None` for anything else. |
| 817 | pub fn as_person(user: &User) -> Option<User> { |
| 818 | let acting = user.acting.as_ref()?; |
| 819 | if user.kind != PrincipalKind::Agent { |
| 820 | return None; |
| 821 | } |
| 822 | let run = acting.run()?; |
| 823 | if run.usage != CredentialUse::Runner { |
| 824 | return None; |
| 825 | } |
| 826 | Some(User { |
| 827 | id: acting.on_behalf_of.id.clone(), |
| 828 | username: acting.on_behalf_of.username.clone(), |
| 829 | kind: PrincipalKind::User, |
| 830 | verified: user.verified, |
| 831 | workspaces: user.workspaces.clone(), |
| 832 | avatar: None, |
| 833 | acting: None, |
| 834 | grants: user.grants.clone(), |
| 835 | token: None, |
| 836 | }) |
| 837 | } |
| 838 | |
| 839 | /// How an actor is described: "g1t on behalf of syntaqx". |
| 840 | pub fn describe(user: &User) -> String { |
| 841 | match &user.acting { |
| 842 | Some(acting) => format!( |
| 843 | "{} on behalf of {}", |
| 844 | acting.agent, acting.on_behalf_of.username |
| 845 | ), |
| 846 | None => user.username.clone(), |
| 847 | } |
| 848 | } |
| 849 | |
| 850 | #[cfg(test)] |
| 851 | mod tests { |
| 852 | use super::*; |
| 853 | |
| 854 | #[test] |
| 855 | fn a_run_s_scopes_are_never_admin() { |
| 856 | for kind in RunCredentialKind::ALL { |
| 857 | for usage in [CredentialUse::Runner, CredentialUse::Tools] { |
| 858 | let scopes = run_scopes(kind, usage); |
| 859 | assert!(scopes.iter().all(|scope| !scope.dangerous()), "{kind:?} {usage:?}: {scopes:?}"); |
| 860 | } |
| 861 | } |
| 862 | let review = run_scopes(RunCredentialKind::Review, CredentialUse::Tools); |
| 863 | assert!(review.contains(&crate::scopes::Scope::PullRequestsWrite)); |
| 864 | assert!(!review.contains(&crate::scopes::Scope::CodeWrite)); |
| 865 | } |
| 866 | |
| 867 | #[test] |
| 868 | fn agents_can_search_the_context_hub() { |
| 869 | for kind in [RunCredentialKind::Implement, RunCredentialKind::Review, RunCredentialKind::Plan] { |
| 870 | let tools = operations_for(kind, CredentialUse::Tools); |
| 871 | assert!(tools.contains(&"search_context") && tools.contains(&"get_entity")); |
| 872 | } |
| 873 | assert!(is_read("search_context") && is_read("get_entity")); |
| 874 | } |
| 875 | |
| 876 | #[test] |
| 877 | fn agents_can_search_all_of_g1t() { |
| 878 | // Site-wide search only reads: every run that reads its repository |
| 879 | // may use it, and nothing that never reads gets it. |
| 880 | assert!(is_read("search")); |
| 881 | assert!(!NEVER.contains(&"search")); |
| 882 | for kind in [ |
| 883 | RunCredentialKind::Implement, |
| 884 | RunCredentialKind::Revise, |
| 885 | RunCredentialKind::Answer, |
| 886 | RunCredentialKind::Review, |
| 887 | RunCredentialKind::Plan, |
| 888 | RunCredentialKind::Update, |
| 889 | ] { |
| 890 | let tools = operations_for(kind, CredentialUse::Tools); |
| 891 | assert!(tools.contains(&"search"), "{kind:?} should search"); |
| 892 | // The context hub's search stays its own tool beside it. |
| 893 | assert!(tools.contains(&"search_context"), "{kind:?} keeps search_context"); |
| 894 | } |
| 895 | for kind in [RunCredentialKind::Checks, RunCredentialKind::Queue, RunCredentialKind::Mergecheck, RunCredentialKind::Deploy, RunCredentialKind::Bump] { |
| 896 | assert!(!operations_for(kind, CredentialUse::Tools).contains(&"search")); |
| 897 | } |
| 898 | assert!(!operations_for(RunCredentialKind::Implement, CredentialUse::Runner).contains(&"search")); |
| 899 | } |
| 900 | |
| 901 | fn path(namespace: &str, name: &str) -> RepoPath { |
| 902 | RepoPath { |
| 903 | namespace: namespace.to_owned(), |
| 904 | name: name.to_owned(), |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | fn scope(kind: RunCredentialKind, usage: CredentialUse) -> AgentScope { |
| 909 | AgentScope { |
| 910 | repo: path("acme", "rocket"), |
| 911 | operations: operations_for(kind, usage) |
| 912 | .into_iter() |
| 913 | .map(str::to_owned) |
| 914 | .collect(), |
| 915 | run: Some(RunBinding { |
| 916 | kind, |
| 917 | usage, |
| 918 | run_id: Some("run_1".to_owned()), |
| 919 | number: Some(7), |
| 920 | agent: "g1t".to_owned(), |
| 921 | system: false, |
| 922 | read: vec![path("acme", "rocket")], |
| 923 | push: match kind { |
| 924 | RunCredentialKind::Implement |
| 925 | | RunCredentialKind::Revise |
| 926 | | RunCredentialKind::Answer => vec![GitGrant { |
| 927 | repo: path("pulls", "pul_7"), |
| 928 | branch: None, |
| 929 | }], |
| 930 | RunCredentialKind::Update => vec![GitGrant { |
| 931 | repo: path("acme", "rocket"), |
| 932 | branch: Some("fix-login".to_owned()), |
| 933 | }], |
| 934 | _ => vec![], |
| 935 | }, |
| 936 | }), |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | fn agent(member_of: &[&str], scope: AgentScope) -> User { |
| 941 | User { |
| 942 | id: "usr_g1t_agent".to_owned(), |
| 943 | username: "g1t".to_owned(), |
| 944 | kind: PrincipalKind::Agent, |
| 945 | verified: true, |
| 946 | workspaces: member_of |
| 947 | .iter() |
| 948 | .map(|slug| Membership::member(*slug)) |
| 949 | .collect(), |
| 950 | avatar: None, |
| 951 | grants: Vec::new(), |
| 952 | token: None, |
| 953 | acting: Some(Box::new(Acting { |
| 954 | credential_id: "tok_1".to_owned(), |
| 955 | agent: "g1t".to_owned(), |
| 956 | on_behalf_of: Principal { |
| 957 | id: "usr_1".to_owned(), |
| 958 | username: "syntaqx".to_owned(), |
| 959 | }, |
| 960 | scope, |
| 961 | })), |
| 962 | } |
| 963 | } |
| 964 | |
| 965 | fn op(kind: RunCredentialKind, usage: CredentialUse, operation: &str) -> Decision { |
| 966 | let scope = scope(kind, usage); |
| 967 | let user = agent(&["acme"], scope.clone()); |
| 968 | decide_operation( |
| 969 | &user, |
| 970 | &scope, |
| 971 | operation, |
| 972 | Some(&path("acme", "rocket")), |
| 973 | true, |
| 974 | Some(7), |
| 975 | ) |
| 976 | } |
| 977 | |
| 978 | use CredentialUse::{Runner, Tools}; |
| 979 | use RunCredentialKind as K; |
| 980 | |
| 981 | /// Which operations each kind of run may use through its tools: the |
| 982 | /// allowed and denied matrix. |
| 983 | #[test] |
| 984 | fn tools_matrix() { |
| 985 | let cases: [(&str, [bool; 6]); 12] = [ |
| 986 | // implement revise answer review plan checks |
| 987 | ("get_issue", [true, true, true, true, true, false]), |
| 988 | ("create_issue", [true, true, true, false, true, false]), |
| 989 | ("add_comment", [true, true, true, true, false, false]), |
| 990 | ( |
| 991 | "review_pull_request", |
| 992 | [false, false, false, true, false, false], |
| 993 | ), |
| 994 | ("remember", [true, true, true, false, false, false]), |
| 995 | ("take_messages", [true, true, true, false, false, false]), |
| 996 | ("record_session", [false, false, false, false, false, false]), |
| 997 | ( |
| 998 | "merge_pull_request", |
| 999 | [false, false, false, false, false, false], |
| 1000 | ), |
| 1001 | ( |
| 1002 | "update_repo_settings", |
| 1003 | [false, false, false, false, false, false], |
| 1004 | ), |
| 1005 | ("create_webhook", [false, false, false, false, false, false]), |
| 1006 | ( |
| 1007 | "set_actions_secret", |
| 1008 | [false, false, false, false, false, false], |
| 1009 | ), |
| 1010 | ("assign_issue", [false, false, false, false, false, false]), |
| 1011 | ]; |
| 1012 | let kinds = [ |
| 1013 | K::Implement, |
| 1014 | K::Revise, |
| 1015 | K::Answer, |
| 1016 | K::Review, |
| 1017 | K::Plan, |
| 1018 | K::Checks, |
| 1019 | ]; |
| 1020 | for (operation, expected) in cases { |
| 1021 | for (kind, allowed) in kinds.into_iter().zip(expected) { |
| 1022 | assert_eq!( |
| 1023 | op(kind, Tools, operation).allowed, |
| 1024 | allowed, |
| 1025 | "{operation} by a {} run's tools", |
| 1026 | kind.as_str() |
| 1027 | ); |
| 1028 | } |
| 1029 | } |
| 1030 | } |
| 1031 | |
| 1032 | #[test] |
| 1033 | fn runner_matrix() { |
| 1034 | assert!(op(K::Implement, Runner, "record_session").allowed); |
| 1035 | assert!(op(K::Implement, Runner, "mark_pull_request_ready").allowed); |
| 1036 | assert!(op(K::Revise, Runner, "record_session").allowed); |
| 1037 | assert!(!op(K::Revise, Runner, "mark_pull_request_ready").allowed); |
| 1038 | assert!(!op(K::Implement, Runner, "create_issue").allowed); |
| 1039 | assert!(!op(K::Review, Runner, "record_session").allowed); |
| 1040 | assert!(!op(K::Checks, Runner, "get_issue").allowed); |
| 1041 | } |
| 1042 | |
| 1043 | #[test] |
| 1044 | fn settings_billing_tokens_and_members_are_never_reachable() { |
| 1045 | for kind in RunCredentialKind::ALL { |
| 1046 | for usage in [Runner, Tools] { |
| 1047 | for operation in NEVER.iter().copied() { |
| 1048 | let decision = op(kind, usage, operation); |
| 1049 | assert!(!decision.allowed); |
| 1050 | assert_eq!(decision.rule, "never"); |
| 1051 | } |
| 1052 | } |
| 1053 | } |
| 1054 | // Even a scope that lists one is refused. |
| 1055 | let mut wide = scope(K::Implement, Tools); |
| 1056 | wide.operations.push("merge_pull_request".to_owned()); |
| 1057 | let user = agent(&["acme"], wide.clone()); |
| 1058 | let decision = decide_operation( |
| 1059 | &user, |
| 1060 | &wide, |
| 1061 | "merge_pull_request", |
| 1062 | Some(&path("acme", "rocket")), |
| 1063 | true, |
| 1064 | Some(7), |
| 1065 | ); |
| 1066 | assert_eq!(decision.rule, "never"); |
| 1067 | } |
| 1068 | |
| 1069 | #[test] |
| 1070 | fn another_repository_is_refused() { |
| 1071 | let scope = scope(K::Implement, Tools); |
| 1072 | let user = agent(&["acme"], scope.clone()); |
| 1073 | let decision = decide_operation( |
| 1074 | &user, |
| 1075 | &scope, |
| 1076 | "create_issue", |
| 1077 | Some(&path("acme", "other")), |
| 1078 | true, |
| 1079 | None, |
| 1080 | ); |
| 1081 | assert!(!decision.allowed); |
| 1082 | assert_eq!(decision.rule, "scope:repository"); |
| 1083 | let decision = decide_operation(&user, &scope, "create_issue", None, true, None); |
| 1084 | assert_eq!(decision.rule, "scope:repository"); |
| 1085 | // The repository's name is matched without regard to case. |
| 1086 | let decision = decide_operation( |
| 1087 | &user, |
| 1088 | &scope, |
| 1089 | "create_issue", |
| 1090 | Some(&path("Acme", "Rocket")), |
| 1091 | true, |
| 1092 | None, |
| 1093 | ); |
| 1094 | assert!(decision.allowed); |
| 1095 | assert_eq!(decision.rule, "run:implement/tools"); |
| 1096 | } |
| 1097 | |
| 1098 | #[test] |
| 1099 | fn the_permission_is_the_intersection_with_the_person() { |
| 1100 | let scope = scope(K::Implement, Tools); |
| 1101 | // The person left the workspace: their agent can do nothing there. |
| 1102 | let user = agent(&[], scope.clone()); |
| 1103 | let decision = decide_operation( |
| 1104 | &user, |
| 1105 | &scope, |
| 1106 | "get_issue", |
| 1107 | Some(&path("acme", "rocket")), |
| 1108 | true, |
| 1109 | Some(1), |
| 1110 | ); |
| 1111 | assert!(!decision.allowed); |
| 1112 | assert_eq!(decision.rule, "on-behalf-of:membership"); |
| 1113 | // And an owner's agent is only ever a member. |
| 1114 | let owner = vec![ |
| 1115 | Membership { |
| 1116 | slug: "acme".to_owned(), |
| 1117 | role: Role::Owner, |
| 1118 | name: None, |
| 1119 | avatar: None, |
| 1120 | base_permission: Some(BasePermission::None), |
| 1121 | team_creation: None, |
| 1122 | }, |
| 1123 | Membership::member("elsewhere"), |
| 1124 | ]; |
| 1125 | let memberships = intersect(&owner, "Acme"); |
| 1126 | assert_eq!(memberships.len(), 1); |
| 1127 | assert_eq!(memberships[0].slug, "acme"); |
| 1128 | assert_eq!(memberships[0].role, Role::Member); |
| 1129 | assert!(intersect(&owner, "nowhere").is_empty()); |
| 1130 | } |
| 1131 | |
| 1132 | /// An agent gets at most the person's role on the repository, and |
| 1133 | /// never more than Write; nothing outside the run's workspace. |
| 1134 | #[test] |
| 1135 | fn an_agent_has_at_most_its_persons_role() { |
| 1136 | use crate::access::{Capability, RepoRef, can, permission}; |
| 1137 | let rocket = RepoRef { id: "rep_1", namespace: "acme", private: true }; |
| 1138 | let other = RepoRef { id: "rep_2", namespace: "acme", private: true }; |
| 1139 | let elsewhere = RepoRef { id: "rep_3", namespace: "globex", private: true }; |
| 1140 | let tools = scope(K::Implement, Tools); |
| 1141 | let scope = scope(K::Implement, Runner); |
| 1142 | // An owner's agent: Write, never Admin. |
| 1143 | let owner = [Membership { role: Role::Owner, ..Membership::member("acme") }, Membership::member("globex")]; |
| 1144 | let mut agent_user = agent(&[], scope.clone()); |
| 1145 | agent_user.workspaces = intersect(&owner, "acme"); |
| 1146 | assert_eq!(permission(Some(&agent_user), rocket), Some(RepoRole::Write)); |
| 1147 | assert!(!can(Some(&agent_user), rocket, Capability::ManageSettings)); |
| 1148 | assert_eq!(permission(Some(&agent_user), elsewhere), None); |
| 1149 | // A member whose workspace gives Read: Read, so it cannot push. |
| 1150 | let reader = [Membership { base_permission: Some(BasePermission::Read), ..Membership::member("acme") }]; |
| 1151 | agent_user.workspaces = intersect(&reader, "acme"); |
| 1152 | assert_eq!(permission(Some(&agent_user), rocket), Some(RepoRole::Read)); |
| 1153 | assert!(!can(Some(&agent_user), rocket, Capability::Push)); |
| 1154 | // An outside collaborator with Maintain on one repository: Write |
| 1155 | // there, nothing elsewhere, and the run is allowed. |
| 1156 | let grants = [ |
| 1157 | RepoGrant { repo_id: "rep_1".into(), workspace: "acme".into(), role: RepoRole::Maintain, team: None }, |
| 1158 | RepoGrant { repo_id: "rep_3".into(), workspace: "globex".into(), role: RepoRole::Admin, team: None }, |
| 1159 | ]; |
| 1160 | agent_user.workspaces = intersect(&[], "acme"); |
| 1161 | agent_user.grants = intersect_grants(&grants, "Acme"); |
| 1162 | assert_eq!(permission(Some(&agent_user), rocket), Some(RepoRole::Write)); |
| 1163 | assert_eq!(permission(Some(&agent_user), other), None); |
| 1164 | assert_eq!(permission(Some(&agent_user), elsewhere), None); |
| 1165 | let decision = decide_operation(&agent_user, &tools, "get_issue", Some(&path("acme", "rocket")), true, Some(1)); |
| 1166 | assert!(decision.allowed, "{}", decision.reason.unwrap_or_default()); |
| 1167 | // The person, downstream of a runner's credential, carries the same. |
| 1168 | let person = as_person(&agent_user).expect("a runner acts as the person"); |
| 1169 | assert_eq!(permission(Some(&person), rocket), Some(RepoRole::Write)); |
| 1170 | } |
| 1171 | |
| 1172 | #[test] |
| 1173 | fn a_runner_changes_only_its_own_pull_request() { |
| 1174 | let scope = scope(K::Implement, Runner); |
| 1175 | let user = agent(&["acme"], scope.clone()); |
| 1176 | let repo = path("acme", "rocket"); |
| 1177 | let other = decide_operation(&user, &scope, "record_session", Some(&repo), true, Some(8)); |
| 1178 | assert!(!other.allowed); |
| 1179 | assert_eq!(other.rule, "scope:pull"); |
| 1180 | let own = decide_operation(&user, &scope, "record_session", Some(&repo), true, Some(7)); |
| 1181 | assert!(own.allowed); |
| 1182 | // Reading another is fine. |
| 1183 | assert!( |
| 1184 | decide_operation( |
| 1185 | &user, |
| 1186 | &scope, |
| 1187 | "get_pull_request", |
| 1188 | Some(&repo), |
| 1189 | true, |
| 1190 | Some(8) |
| 1191 | ) |
| 1192 | .allowed |
| 1193 | ); |
| 1194 | } |
| 1195 | |
| 1196 | #[test] |
| 1197 | fn git_matrix() { |
| 1198 | let fork = path("pulls", "pul_7"); |
| 1199 | let upstream = path("acme", "rocket"); |
| 1200 | let elsewhere = path("acme", "billing"); |
| 1201 | let implement = scope(K::Implement, Runner); |
| 1202 | assert!(decide_git(&implement, &fork, true).allowed); |
| 1203 | assert!(decide_git(&implement, &fork, false).allowed); |
| 1204 | assert!(decide_git(&implement, &upstream, false).allowed); |
| 1205 | assert_eq!(decide_git(&implement, &upstream, true).rule, "git:push"); |
| 1206 | assert_eq!(decide_git(&implement, &elsewhere, false).rule, "git:read"); |
| 1207 | let review = scope(K::Review, Runner); |
| 1208 | assert!(decide_git(&review, &upstream, false).allowed); |
| 1209 | assert!(!decide_git(&review, &upstream, true).allowed); |
| 1210 | assert!(!decide_git(&review, &fork, true).allowed); |
| 1211 | // A tools token made before run credentials never reaches git. |
| 1212 | let old = AgentScope { |
| 1213 | repo: upstream.clone(), |
| 1214 | operations: vec!["get_issue".to_owned()], |
| 1215 | run: None, |
| 1216 | }; |
| 1217 | assert_eq!(decide_git(&old, &upstream, false).rule, "git:not-a-run"); |
| 1218 | // Nor does an agent's tools token. |
| 1219 | assert_eq!( |
| 1220 | decide_git(&scope(K::Implement, Tools), &upstream, false).rule, |
| 1221 | "git:not-a-run" |
| 1222 | ); |
| 1223 | } |
| 1224 | |
| 1225 | #[test] |
| 1226 | fn a_push_moves_only_granted_branches() { |
| 1227 | let update = scope(K::Update, Runner); |
| 1228 | let repo = path("acme", "rocket"); |
| 1229 | let refs = |names: &[&str]| { |
| 1230 | names |
| 1231 | .iter() |
| 1232 | .map(|name| (*name).to_owned()) |
| 1233 | .collect::<Vec<_>>() |
| 1234 | }; |
| 1235 | assert!(decide_refs(&update, &repo, &refs(&["refs/heads/fix-login"])).allowed); |
| 1236 | assert_eq!( |
| 1237 | decide_refs(&update, &repo, &refs(&["refs/heads/main"])).rule, |
| 1238 | "git:ref" |
| 1239 | ); |
| 1240 | assert_eq!( |
| 1241 | decide_refs( |
| 1242 | &update, |
| 1243 | &repo, |
| 1244 | &refs(&["refs/heads/fix-login", "refs/tags/v1"]) |
| 1245 | ) |
| 1246 | .rule, |
| 1247 | "git:ref" |
| 1248 | ); |
| 1249 | let implement = scope(K::Implement, Runner); |
| 1250 | assert!( |
| 1251 | decide_refs( |
| 1252 | &implement, |
| 1253 | &path("pulls", "pul_7"), |
| 1254 | &refs(&["refs/heads/main"]) |
| 1255 | ) |
| 1256 | .allowed |
| 1257 | ); |
| 1258 | } |
| 1259 | |
| 1260 | #[test] |
| 1261 | fn a_runner_acts_downstream_as_the_person() { |
| 1262 | let user = agent(&["acme"], scope(K::Implement, Runner)); |
| 1263 | let person = as_person(&user).unwrap(); |
| 1264 | assert_eq!(person.id, "usr_1"); |
| 1265 | assert_eq!(person.username, "syntaqx"); |
| 1266 | assert_eq!(person.kind, PrincipalKind::User); |
| 1267 | assert!(person.is_member("acme")); |
| 1268 | assert!(person.acting.is_none()); |
| 1269 | assert_eq!(describe(&user), "g1t on behalf of syntaqx"); |
| 1270 | // The tools act as the agent. |
| 1271 | assert!(as_person(&agent(&["acme"], scope(K::Implement, Tools))).is_none()); |
| 1272 | } |
| 1273 | |
| 1274 | #[test] |
| 1275 | fn scopes_without_a_run_still_parse() { |
| 1276 | let old: AgentScope = serde_json::from_str( |
| 1277 | r#"{"repo":{"namespace":"acme","name":"rocket"},"operations":["get_issue"]}"#, |
| 1278 | ) |
| 1279 | .unwrap(); |
| 1280 | assert!(old.run.is_none()); |
| 1281 | let written = serde_json::to_string(&scope(K::Review, Tools)).unwrap(); |
| 1282 | assert!(written.contains(r#""use":"tools""#)); |
| 1283 | assert!(written.contains(r#""kind":"review""#)); |
| 1284 | let back: AgentScope = serde_json::from_str(&written).unwrap(); |
| 1285 | assert_eq!(back.run.unwrap().kind, K::Review); |
| 1286 | // Only g1t's own runs say so; every other reads as not. |
| 1287 | assert!(!written.contains("system")); |
| 1288 | assert!(!back_run(&written).system); |
| 1289 | let mut own = scope(K::Bump, Runner); |
| 1290 | own.run.as_mut().unwrap().system = true; |
| 1291 | let written = serde_json::to_string(&own).unwrap(); |
| 1292 | assert!(written.contains(r#""system":true"#)); |
| 1293 | assert!(back_run(&written).system); |
| 1294 | } |
| 1295 | |
| 1296 | fn back_run(written: &str) -> RunBinding { |
| 1297 | serde_json::from_str::<AgentScope>(written).unwrap().run.unwrap() |
| 1298 | } |
| 1299 | } |