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2616 } 2617 2618 // leave `token_hex`'s session for visitors arriving without one. only the 2619 // `try` fixture writes one. the name can't collide with a session token. 2620 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 2621 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 2622 defer file.close(self.io); 2623 try file.writeStreamingAll(self.io, token_hex); 2624 } 2625 2626 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 2627 out.* = self.auto_login orelse return false; 2628 return true; 2629 } 2630 2631 const auto_login_name = "auto-login"; 2632 2633 // a token is exactly token_hex_len hex chars. validating before using the 2634 // value as a path keeps attacker-supplied cookies from escaping the 2635 // sessions dir (e.g. via "/" or ".." bytes). 2636 fn isToken(token_hex: []const u8) bool { 2637 if (token_hex.len != token_hex_len) return false; 2638 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 2639 return true; 2640 } 2641 }; 2642