1 #pragma once 2 3 #include "bmcweb_config.h" 4 5 #include "http_request.hpp" 6 #include "http_response.hpp" 7 8 inline void addSecurityHeaders(const crow::Request& req [[maybe_unused]], 9 crow::Response& res) 10 { 11 /* 12 TODO(ed) these should really check content types. for example, 13 X-Content-Type-Options header doesn't make sense when retrieving a JSON or 14 javascript file. It doesn't hurt anything, it's just ugly. 15 */ 16 using bf = boost::beast::http::field; 17 18 // Recommendations from https://owasp.org/www-project-secure-headers/ 19 // https://owasp.org/www-project-secure-headers/ci/headers_add.json 20 res.addHeader(bf::strict_transport_security, "max-age=31536000; " 21 "includeSubdomains"); 22 res.addHeader(bf::x_frame_options, "DENY"); 23 24 res.addHeader(bf::pragma, "no-cache"); 25 res.addHeader(bf::cache_control, "no-store, max-age=0"); 26 27 res.addHeader("X-Content-Type-Options", "nosniff"); 28 29 res.addHeader("Referrer-Policy", "no-referrer"); 30 res.addHeader("Permissions-Policy", "accelerometer=()," 31 "ambient-light-sensor=()," 32 "autoplay=()," 33 "battery=()," 34 "camera=()," 35 "display-capture=()," 36 "document-domain=()," 37 "encrypted-media=()," 38 "fullscreen=()," 39 "gamepad=()," 40 "geolocation=()," 41 "gyroscope=()," 42 "layout-animations=(self)," 43 "legacy-image-formats=(self)," 44 "magnetometer=()," 45 "microphone=()," 46 "midi=()," 47 "oversized-images=(self)," 48 "payment=()," 49 "picture-in-picture=()," 50 "publickey-credentials-get=()," 51 "speaker-selection=()," 52 "sync-xhr=(self)," 53 "unoptimized-images=(self)," 54 "unsized-media=(self)," 55 "usb=()," 56 "screen-wak-lock=()," 57 "web-share=()," 58 "xr-spatial-tracking=()"); 59 res.addHeader("X-Permitted-Cross-Domain-Policies", "none"); 60 res.addHeader("Cross-Origin-Embedder-Policy", "require-corp"); 61 res.addHeader("Cross-Origin-Opener-Policy", "same-origin"); 62 res.addHeader("Cross-Origin-Resource-Policy", "same-origin"); 63 if (bmcwebInsecureDisableXssPrevention == 0) 64 { 65 res.addHeader("Content-Security-Policy", "default-src 'none'; " 66 "img-src 'self' data:; " 67 "font-src 'self'; " 68 "style-src 'self'; " 69 "script-src 'self'; " 70 "connect-src 'self' wss:; " 71 "form-action 'none'; " 72 "frame-ancestors 'none'; " 73 "object-src 'none'; " 74 "base-uri 'none' "); 75 // The KVM currently needs to load images from base64 encoded 76 // strings. img-src 'self' data: is used to allow that. 77 // https://stackoverflow.com/questions/18447970/content-security-polic 78 // y-data-not-working-for-base64-images-in-chrome-28 79 } 80 else 81 { 82 // If XSS is disabled, we need to allow loading from addresses other 83 // than self, as the BMC will be hosted elsewhere. 84 res.addHeader("Content-Security-Policy", "default-src 'none'; " 85 "img-src *; " 86 "font-src *; " 87 "style-src *; " 88 "script-src *; " 89 "connect-src *; " 90 "form-action *; " 91 "frame-ancestors *; " 92 "object-src *; " 93 "base-uri *"); 94 95 std::string_view origin = req.getHeaderValue("Origin"); 96 res.addHeader(bf::access_control_allow_origin, origin); 97 res.addHeader(bf::access_control_allow_methods, "GET, " 98 "POST, " 99 "PUT, " 100 "PATCH, " 101 "DELETE"); 102 res.addHeader(bf::access_control_allow_credentials, "true"); 103 res.addHeader(bf::access_control_allow_headers, "Origin, " 104 "Content-Type, " 105 "Accept, " 106 "Cookie, " 107 "X-XSRF-TOKEN"); 108 } 109 } 110