╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ serve_ssh.zig ────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭969f5924..╮ 969f5924.. haxy: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues patches new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (705) 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
573 574 // the key holder a push acts as 575 const Pusher = struct { 576 user_id: [evt.event_id_size]u8, 577 author: evt.CommitAuthor, 578 protected_branches: []const []const u8, 579 locked_branches: []const []const u8, 580 // only owners may clear the undo history 581 owner: bool, 582 }; 583 584 // the owner of a repo a push may create 585 const RepoCreator = struct { 586 owner_id: [evt.event_id_size]u8, 587 owner: evt.CommitAuthor, 588 }; 589 590 fn authorizeRepoKey( 591 io: std.Io, 592 arena: *std.heap.ArenaAllocator, 593 admin_repo_path: []const u8, 594 users_dir: []const u8, 595 owner_name: []const u8, 596 repo_name: []const u8, 597 service: GitService, 598 fingerprint: *const [ssh.fingerprint_len]u8, 599 ) !RepoAuthorization { 600 const allocator = arena.child_allocator; 601 var admin = rp.Repo(.xit, evt.admin_repo_opts).open(io, allocator, .{ .path = admin_repo_path }) catch |err| switch (err) { 602 error.RepoNotFound => return .not_found, 603 else => |e| return e, 604 }; 605 defer admin.deinit(io, allocator); 606 607 const moment = try evt.currentMoment(evt.admin_repo_opts, &admin); 608 // no viewer yet, so this carries the base role 609 const repo = (try evt.readRepoByOwnerAndName(io, allocator, arena, moment, users_dir, owner_name, repo_name, null)) orelse { 610 if (service == .upload_pack) return .not_found; 611 const owner_id = (try evt.User.readIdByName(evt.AdminDB, evt.admin_repo_opts.hash, moment, owner_name)) orelse return .not_found; 612 if (!try evt.User.holdsKey(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, &owner_id, fingerprint)) return .denied; 613 return .{ .create = .{ .owner_id = owner_id, .owner = try commitAuthor(moment, arena, &owner_id) } }; 614 }; 615 616 const min_role: evt.Repo.Role = switch (service) { 617 .upload_pack => .read, 618 .receive_pack => .write, 619 }; 620 // any key may fetch a public repo; a push always needs a key holder 621 if (service == .upload_pack and repo.role != null) return .{ .allowed = .fetch }; 622 623 // a key can be shared, so the push acts as the holder with the highest role 624 const owner_id = try evt.parseEventId(&repo.repo.event.user_id); 625 var best: ?struct { id: [evt.event_id_size]u8, role: evt.Repo.Role } = null; 626 for (try evt.User.readIdsByFingerprint(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, fingerprint)) |holder_id| { 627 const seen = (try evt.readRepoById(io, allocator, arena, users_dir, &owner_id, &repo.event_id, holder_id)) orelse return .not_found; 628 const role = seen.role orelse continue; 629 if (best) |held| if (held.role.atLeast(role)) continue; 630 best = .{ .id = holder_id, .role = role }; 631 } 632 const holder = best orelse return .denied; 633 if (!holder.role.atLeast(min_role)) return .denied; 634 return .{ 635 .allowed = switch (service) { 636 .upload_pack => .fetch, 637 .receive_pack => blk: { 638 const names = try repo.repo.event.protectedBranchNames(arena.allocator()); 639 // members change protected branches only by merging a patch 640 const owner = holder.role == .owner; 641 break :blk .{ .push = .{ 642 .user_id = holder.id, 643 .author = try commitAuthor(moment, arena, &holder.id), 644 .protected_branches = if (owner) names else &.{}, 645 .locked_branches = if (owner) &.{} else names, 646 .owner = owner, 647 } }; 648 }, 649 }, 650 }; 651 } 652 653 // an active user as a commit author 654 fn commitAuthor( 655 moment: evt.AdminDB.HashMap(.read_only), 656 arena: *std.heap.ArenaAllocator, 657 user_id: *const [evt.event_id_size]u8, 658 ) !evt.CommitAuthor { 659 const user = (try evt.User.readById(evt.AdminDB, evt.admin_repo_opts.hash, moment, arena, user_id)) orelse unreachable; 660 return .{ .name = user.event.name, .email = user.event.email }; 661 } 662 663 // the authorized_keys line of a pubkey blob: its type, then the blob in base64 664 fn authorizedKeyLine(allocator: std.mem.Allocator, blob: []const u8) ![]const u8 { 665 var reader = std.Io.Reader.fixed(blob); 666 const key_type = try ssh.takeString(&reader, 64); 667 const encoder = std.base64.standard.Encoder; 668 const line = try allocator.alloc(u8, key_type.len + 1 + encoder.calcSize(blob.len)); 669 @memcpy(line[0..key_type.len], key_type); 670 line[key_type.len] = ' '; 671 _ = encoder.encode(line[key_type.len + 1 ..], blob); 672 return line; 673 } 674 675 fn writeError(sess: *ssh.SessionCtx, comptime msg: []const u8) !void { 676 const body = "ERR haxy ssh: " ++ msg; 677 var packet: [body.len + 4]u8 = undefined; 678 const line = try std.fmt.bufPrint(&packet, "{x:0>4}{s}", .{ packet.len, body }); 679 try sess.writeBytes(line); 680 try sess.exit(1); 681 } 682 683 test "parseGitCommand rejects malformed input" { 684 const allocator = std.testing.allocator; 685 try std.testing.expectError(error.InvalidCommand, parseGitCommand(allocator, "git-upload-pack")); 686 try std.testing.expectError(error.UnsupportedService, parseGitCommand(allocator, "ls -la")); 687 try std.testing.expectError(error.UnsupportedService, parseGitCommand(allocator, "git-fake-pack 'repo'")); 688 } 689 690 test "parseGitCommand happy paths" { 691 const allocator = std.testing.allocator; 692 693 { 694 const parsed = try parseGitCommand(allocator, "git-upload-pack 'some-repo'"); 695 defer parsed.deinit(allocator); 696 try std.testing.expectEqual(GitService.upload_pack, parsed.service); 697 try std.testing.expectEqualStrings("some-repo", parsed.dir); 698 } 699 { 700 const parsed = try parseGitCommand(allocator, "git-receive-pack 'user/proj'"); 701 defer parsed.deinit(allocator); 702 try std.testing.expectEqual(GitService.receive_pack, parsed.service); 703 try std.testing.expectEqualStrings("user/proj", parsed.dir); 704 } 705 { 706 const parsed = try parseGitCommand(allocator, "git-upload-pack repo"); 707 defer parsed.deinit(allocator); 708 try std.testing.expectEqual(GitService.upload_pack, parsed.service); 709 try std.testing.expectEqualStrings("repo", parsed.dir); 710 } 711 } 712