HAXY

▄▄ ▀▀▀▄ ▄▄ ▀▀▀▀▀▄ ▄▀▀▀▀ ▀▀▀▀▀▀ ▄▀▀▀▀▀▀ ▀▀▀▀▀▀ ▀ ▀ ▄▀▀▀▀▀▀ ▀▀▀▀▀▀ ▄▀ ▄▀ ▄▀▀▀▀▀▀▀▀ ▀▀▀▄▄ ▀▀▀▀▀▀ ▀▀ ▀▄▀▀ ▄▀ ▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▄ ▀▀▀▀▀▄ ▄▀▀▀▀▀▀▀ ▄ ▄▀▄▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▄ ▄▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀ ▀▀▀▀▀▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▄▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▄▄▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▄▀▀▀▀▀▀▀▀▀▀▄ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▄▄ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▄▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀ ▀▀▀▀▀▀▀▀▄ ▀▀▀ ▀▀▀▀▀▀▀▀ ▀▀▀ ▀▀▀ ▀▀▀▀▀ ▀▀ ▀▀▀▀▀▀ ▀▀▀▄▀▄ ▄▄▄▀▀ ▀▀▀▀▀▀ ▀▀▄▀▀▀▀▀▀▀ ▀▀▀▀▀▄▀▀▀▀▀ ▀▀▀▀▀▄ ▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▄▀ ▄▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀ ▀

╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ web.zig ──────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯

╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯

.. embed/ event/ test/ ui/ command.zig event.zig lib.zig main.zig main_wasm.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 │ ╰─────────────────────────────────╯

785 return trimmed[eq + 1 ..]; 786 } 787 } 788 } 789 return null; 790 } 791 792 fn parseFormField(allocator: std.mem.Allocator, body: []const u8, key: []const u8) !?[]u8 { 793 var iter = std.mem.splitScalar(u8, body, '&'); 794 while (iter.next()) |pair| { 795 const eq = std.mem.indexOfScalar(u8, pair, '=') orelse continue; 796 if (std.mem.eql(u8, pair[0..eq], key)) { 797 return try decodeFormValue(allocator, pair[eq + 1 ..]); 798 } 799 } 800 return null; 801 } 802 803 fn decodeFormValue(allocator: std.mem.Allocator, encoded: []const u8) ![]u8 { 804 var out: std.ArrayList(u8) = .empty; 805 errdefer out.deinit(allocator); 806 var i: usize = 0; 807 while (i < encoded.len) : (i += 1) { 808 switch (encoded[i]) { 809 '+' => try out.append(allocator, ' '), 810 '%' => { 811 if (i + 2 >= encoded.len) return error.InvalidPercentEncoding; 812 const hi = std.fmt.charToDigit(encoded[i + 1], 16) catch return error.InvalidPercentEncoding; 813 const lo = std.fmt.charToDigit(encoded[i + 2], 16) catch return error.InvalidPercentEncoding; 814 try out.append(allocator, hi * 16 + lo); 815 i += 2; 816 }, 817 else => try out.append(allocator, encoded[i]), 818 } 819 } 820 return try out.toOwnedSlice(allocator); 821 } 822 823 // disk-backed web session store. each login mints a random, opaque token 824 // (not the user's id) that is stored as a file named by the token hex, whose 825 // contents are the raw user_id bytes. authenticating a request is a lookup of 826 // the cookie's token; logout deletes the file, revoking the session. there is 827 // deliberately no expiry — a session lives until logout. 828 pub const SessionStore = struct { 829 io: std.Io, 830 dir: std.Io.Dir, 831 832 pub const token_hex_len = evt.event_id_size * 2; 833 834 pub fn init(io: std.Io, data_dir: std.Io.Dir) !SessionStore { 835 try data_dir.createDirPath(io, "sessions"); 836 const dir = try data_dir.openDir(io, "sessions", .{}); 837 return .{ .io = io, .dir = dir }; 838 } 839 840 pub fn deinit(self: SessionStore) void { 841 self.dir.close(self.io); 842 } 843 844 // mint a new session for user_id, returning the token hex to set as the 845 // cookie value. 846 pub fn create(self: SessionStore, user_id: *const [evt.event_id_size]u8) ![token_hex_len]u8 { 847 var token: [evt.event_id_size]u8 = undefined; 848 self.io.random(&token); 849 const token_hex = std.fmt.bytesToHex(token, .lower); 850 const file = try self.dir.createFile(self.io, &token_hex, .{}); 851 defer file.close(self.io); 852 try file.writeStreamingAll(self.io, user_id); 853 return token_hex; 854 } 855 856 // resolve a cookie's token to its user_id. returns false (logged out) for a 857 // missing, malformed, or unknown token. 858 pub fn lookup(self: SessionStore, token_hex: []const u8, out: *[evt.event_id_size]u8) bool { 859 if (!isToken(token_hex)) return false; 860 const file = self.dir.openFile(self.io, token_hex, .{ .mode = .read_only }) catch return false; 861 defer file.close(self.io); 862 var storage: [evt.event_id_size]u8 = undefined; 863 var file_reader = file.reader(self.io, &storage); 864 file_reader.interface.readSliceAll(out) catch return false; 865 return true; 866 } 867 868 // revoke a session. a no-op for a missing or malformed token. 869 pub fn remove(self: SessionStore, token_hex: []const u8) void { 870 if (!isToken(token_hex)) return; 871 self.dir.deleteFile(self.io, token_hex) catch {}; 872 } 873 874 // a token is exactly token_hex_len hex chars. validating before using the 875 // value as a path keeps attacker-supplied cookies from escaping the 876 // sessions dir (e.g. via "/" or ".." bytes). 877 fn isToken(token_hex: []const u8) bool { 878 if (token_hex.len != token_hex_len) return false; 879 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 880 return true; 881 } 882 }; 883