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2721 // leave `token_hex`'s session for visitors arriving without one. only the 2722 // `try` fixture writes one. the name can't collide with a session token. 2723 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 2724 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 2725 defer file.close(self.io); 2726 try file.writeStreamingAll(self.io, token_hex); 2727 } 2728 2729 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 2730 out.* = self.auto_login orelse return false; 2731 return true; 2732 } 2733 2734 const auto_login_name = "auto-login"; 2735 2736 // a token is exactly token_hex_len hex chars. validating before using the 2737 // value as a path keeps attacker-supplied cookies from escaping the 2738 // sessions dir (e.g. via "/" or ".." bytes). 2739 fn isToken(token_hex: []const u8) bool { 2740 if (token_hex.len != token_hex_len) return false; 2741 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 2742 return true; 2743 } 2744 }; 2745