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3165 // leave `token_hex`'s session for visitors arriving without one. only the 3166 // `try` fixture writes one. the name can't collide with a session token. 3167 pub fn offerAutoLogin(self: SessionStore, token_hex: *const [token_hex_len]u8) !void { 3168 const file = try self.dir.createFile(self.io, auto_login_name, .{}); 3169 defer file.close(self.io); 3170 try file.writeStreamingAll(self.io, token_hex); 3171 } 3172 3173 pub fn autoLogin(self: SessionStore, out: *[token_hex_len]u8) bool { 3174 out.* = self.auto_login orelse return false; 3175 return true; 3176 } 3177 3178 const auto_login_name = "auto-login"; 3179 3180 // a token is exactly token_hex_len hex chars. validating before using the 3181 // value as a path keeps attacker-supplied cookies from escaping the 3182 // sessions dir (e.g. via "/" or ".." bytes). 3183 fn isToken(token_hex: []const u8) bool { 3184 if (token_hex.len != token_hex_len) return false; 3185 for (token_hex) |c| if (!std.ascii.isHex(c)) return false; 3186 return true; 3187 } 3188 }; 3189