╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ serve_ssh.zig ────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭f1323b6e..╮ f1323b6e.. haxy: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues patches new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (686) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─╯
.. embed/ event/ test/ ui/ command.zig diff3.zig event.zig find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig notify.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig ╭─────────────────────────────────╮ │serve_ssh.zig │ ╰─────────────────────────────────╯ serve_ssh_protocol.zig test.zig testnet.zig try.zig ui.zig web.zig
515 const target_path = try evt.repoPath(allocator, handler.server.users_dir, &target_owner_id, &target_id); 516 defer allocator.free(target_path); 517 const author: evt.CommitAuthor = .{ .name = user.event.name, .email = user.event.email }; 518 const timestamp: u64 = @intCast(std.Io.Timestamp.now(io, .real).toSeconds()); 519 switch (draft) { 520 inline else => |*repo| { 521 var target_repo = rp.Repo(.xit, repo.self_repo_opts).open(io, allocator, .{ .path = target_path }) catch 522 return writeError(sess, "repo not found or has the wrong hash"); 523 defer target_repo.deinit(io, allocator); 524 try push.receiveFork(repo.self_repo_opts, io, allocator, repo, &target_repo, handler.server, &route.id, author, timestamp, reader, writer, handler.err, sess); 525 }, 526 } 527 } 528 } 529 530 fn parseGitCommand(allocator: std.mem.Allocator, command: []const u8) !ParsedGitCommand { 531 var tokens = try std.process.Args.IteratorGeneral(.{ .single_quotes = true }).init(allocator, command); 532 defer tokens.deinit(); 533 534 const service_token = tokens.next() orelse return error.InvalidCommand; 535 const dir_token = tokens.next() orelse return error.InvalidCommand; 536 537 const service: GitService = 538 if (std.mem.eql(u8, service_token, "git-upload-pack") or std.mem.eql(u8, service_token, "upload-pack")) 539 .upload_pack 540 else if (std.mem.eql(u8, service_token, "git-receive-pack") or std.mem.eql(u8, service_token, "receive-pack")) 541 .receive_pack 542 else 543 return error.UnsupportedService; 544 545 return .{ .service = service, .dir = try allocator.dupe(u8, dir_token) }; 546 } 547 548 const RepoAuthorization = union(enum) { allowed: ?evt.CommitAuthor, create: RepoCreator, denied, not_found }; 549 550 // the owner of a repo a push may create 551 const RepoCreator = struct { 552 owner_id: [evt.event_id_size]u8, 553 owner: evt.CommitAuthor, 554 }; 555 556 fn authorizeRepoKey( 557 io: std.Io, 558 arena: *std.heap.ArenaAllocator, 559 admin_repo_path: []const u8, 560 users_dir: []const u8, 561 owner_name: []const u8, 562 repo_name: []const u8, 563 service: GitService, 564 fingerprint: *const [ssh.fingerprint_len]u8, 565 ) !RepoAuthorization { 566 const allocator = arena.child_allocator; 567 var admin = rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = admin_repo_path }) catch |err| switch (err) { 568 error.RepoNotFound => return .not_found, 569 else => |e| return e, 570 }; 571 defer admin.deinit(io, allocator); 572 573 const moment = try evt.currentMoment(evt.admin_repo_opts, &admin); 574 // no viewer yet, so this carries the base role 575 const repo = (try evt.readRepoByOwnerAndName(io, allocator, arena, moment, users_dir, owner_name, repo_name, null)) orelse { 576 if (service == .upload_pack) return .not_found; 577 const owner_id = (try evt.User.readIdByName(evt.AdminDB, evt.admin_repo_opts.hash, moment, owner_name)) orelse return .not_found; 578 if (!try evt.User.holdsKey(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, &owner_id, fingerprint)) return .denied; 579 return .{ .create = .{ .owner_id = owner_id, .owner = try commitAuthor(moment, arena, &owner_id) } }; 580 }; 581 582 const min_role: evt.Repo.Role = switch (service) { 583 .upload_pack => .read, 584 .receive_pack => .write, 585 }; 586 // skip the key lookups when the base role is enough 587 if (repo.role) |base| { 588 if (base.atLeast(min_role)) return .{ .allowed = null }; 589 } 590 591 // a key can be shared, so a holder whose role falls short doesn't end the search 592 const owner_id = try evt.parseEventId(&repo.repo.event.user_id); 593 for (try evt.User.readIdsByFingerprint(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, fingerprint)) |holder_id| { 594 const seen = (try evt.readRepoById(io, allocator, arena, users_dir, &owner_id, &repo.event_id, holder_id)) orelse return .not_found; 595 const role = seen.role orelse continue; 596 if (role.atLeast(min_role)) return .{ .allowed = try commitAuthor(moment, arena, &holder_id) }; 597 } 598 return .denied; 599 } 600 601 // an active user as a commit author 602 fn commitAuthor( 603 moment: evt.AdminDB.HashMap(.read_only), 604 arena: *std.heap.ArenaAllocator, 605 user_id: *const [evt.event_id_size]u8, 606 ) !evt.CommitAuthor { 607 const user = (try evt.User.readById(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, user_id)) orelse unreachable; 608 return .{ .name = user.event.name, .email = user.event.email }; 609 } 610 611 fn writeError(sess: *ssh.SessionCtx, comptime msg: []const u8) !void { 612 const body = "ERR haxy ssh: " ++ msg; 613 var packet: [body.len + 4]u8 = undefined; 614 const line = try std.fmt.bufPrint(&packet, "{x:0>4}{s}", .{ packet.len, body }); 615 try sess.writeBytes(line); 616 try sess.exit(1); 617 } 618 619 test "parseGitCommand rejects malformed input" { 620 const allocator = std.testing.allocator; 621 try std.testing.expectError(error.InvalidCommand, parseGitCommand(allocator, "git-upload-pack")); 622 try std.testing.expectError(error.UnsupportedService, parseGitCommand(allocator, "ls -la")); 623 try std.testing.expectError(error.UnsupportedService, parseGitCommand(allocator, "git-fake-pack 'repo'")); 624 } 625 626 test "parseGitCommand happy paths" { 627 const allocator = std.testing.allocator; 628 629 { 630 const parsed = try parseGitCommand(allocator, "git-upload-pack 'some-repo'"); 631 defer parsed.deinit(allocator); 632 try std.testing.expectEqual(GitService.upload_pack, parsed.service); 633 try std.testing.expectEqualStrings("some-repo", parsed.dir); 634 } 635 { 636 const parsed = try parseGitCommand(allocator, "git-receive-pack 'user/proj'"); 637 defer parsed.deinit(allocator); 638 try std.testing.expectEqual(GitService.receive_pack, parsed.service); 639 try std.testing.expectEqualStrings("user/proj", parsed.dir); 640 } 641 { 642 const parsed = try parseGitCommand(allocator, "git-upload-pack repo"); 643 defer parsed.deinit(allocator); 644 try std.testing.expectEqual(GitService.upload_pack, parsed.service); 645 try std.testing.expectEqualStrings("repo", parsed.dir); 646 } 647 } 648