diff options
Diffstat (limited to 'common/misc.js')
| -rw-r--r-- | common/misc.js | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/common/misc.js b/common/misc.js index 6e825d6..8894d60 100644 --- a/common/misc.js +++ b/common/misc.js @@ -78,6 +78,23 @@ function csp_rule(nonce) return `script-src ${rule}; script-src-elem ${rule}; script-src-attr 'none'; prefetch-src 'none';`; } +/* Check if some HTTP header might define CSP rules. */ +const csp_header_names = new Set([ + "content-security-policy", + "x-webkit-csp", + "x-content-security-policy" +]); + +const report_only_header_name = "content-security-policy-report-only"; + +function is_csp_header_name(string, include_report_only) +{ + string = string && string.toLowerCase() || ""; + + return (include_report_only && string === report_only_header_name) || + csp_header_names.has(string); +} + /* * Print item together with type, e.g. * nice_name("s", "hello") → "hello (script)" @@ -127,11 +144,12 @@ function parse_csp(csp) { } /* Make CSP headers do our bidding, not interfere */ -function sanitize_csp_header(header, rule, allow) +function sanitize_csp_header(header, policy) { + const rule = `'nonce-${policy.nonce}'`; const csp = parse_csp(header.value); - if (!allow) { + if (!policy.allow) { /* No snitching */ delete csp['report-to']; delete csp['report-uri']; @@ -153,11 +171,11 @@ function sanitize_csp_header(header, rule, allow) else csp['script-src-elem'] = [rule]; - const new_policy = Object.entries(csp).map( + const new_csp = Object.entries(csp).map( i => `${i[0]} ${i[1].join(' ')};` ); - return {name: header.name, value: new_policy.join('')}; + return {name: header.name, value: new_csp.join('')}; } /* Regexes and objest to use as/in schemas for parse_json_with_schema(). */ @@ -178,6 +196,7 @@ const matchers = { * EXPORT extract_signed * EXPORT sign_data * EXPORT csp_rule + * EXPORT is_csp_header_name * EXPORT nice_name * EXPORT open_in_settings * EXPORT is_privileged_url |