1 #pragma once
2 
3 #include <http_response.hpp>
4 
5 inline void addSecurityHeaders(const crow::Request& req [[maybe_unused]],
6                                crow::Response& res)
7 {
8     /*
9      TODO(ed) these should really check content types.  for example,
10      X-UA-Compatible header doesn't make sense when retrieving a JSON or
11      javascript file.  It doesn't hurt anything, it's just ugly.
12      */
13     using bf = boost::beast::http::field;
14     res.addHeader(bf::strict_transport_security, "max-age=31536000; "
15                                                  "includeSubdomains; "
16                                                  "preload");
17     res.addHeader(bf::x_frame_options, "DENY");
18 
19     res.addHeader(bf::pragma, "no-cache");
20     res.addHeader(bf::cache_control, "no-Store,no-Cache");
21 
22     res.addHeader("X-XSS-Protection", "1; "
23                                       "mode=block");
24     res.addHeader("X-Content-Type-Options", "nosniff");
25 
26     if (!bmcwebInsecureDisableXssPrevention)
27     {
28         res.addHeader("Content-Security-Policy", "default-src 'none'; "
29                                                  "img-src 'self' data:; "
30                                                  "font-src 'self'; "
31                                                  "style-src 'self'; "
32                                                  "script-src 'self'; "
33                                                  "connect-src 'self' wss:; "
34                                                  "form-action 'none'; "
35                                                  "frame-ancestors 'none'; "
36                                                  "plugin-types 'none'; "
37                                                  "base-uri 'none' ");
38         // The KVM currently needs to load images from base64 encoded
39         // strings. img-src 'self' data: is used to allow that.
40         // https://stackoverflow.com/questions/18447970/content-security-polic
41         // y-data-not-working-for-base64-images-in-chrome-28
42     }
43     else
44     {
45         // If XSS is disabled, we need to allow loading from addresses other
46         // than self, as the BMC will be hosted elsewhere.
47         res.addHeader("Content-Security-Policy", "default-src 'none'; "
48                                                  "img-src *; "
49                                                  "font-src *; "
50                                                  "style-src *; "
51                                                  "script-src *; "
52                                                  "connect-src *; "
53                                                  "form-action *; "
54                                                  "frame-ancestors *; "
55                                                  "plugin-types *; "
56                                                  "base-uri *");
57 
58         const std::string_view origin = req.getHeaderValue("Origin");
59         res.addHeader(bf::access_control_allow_origin, origin);
60         res.addHeader(bf::access_control_allow_methods, "GET, "
61                                                         "POST, "
62                                                         "PUT, "
63                                                         "PATCH, "
64                                                         "DELETE");
65         res.addHeader(bf::access_control_allow_credentials, "true");
66         res.addHeader(bf::access_control_allow_headers, "Origin, "
67                                                         "Content-Type, "
68                                                         "Accept, "
69                                                         "Cookie, "
70                                                         "X-XSRF-TOKEN");
71     }
72 }
73