15fe5db50e
- Allow 'unsafe-inline' and 'unsafe-eval' scripts on /docs routes - Swagger UI requires inline scripts to function properly - Keep strict CSP for all other API routes
44 lines
1.6 KiB
Go
44 lines
1.6 KiB
Go
package middleware
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import (
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"net/http"
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"strings"
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)
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// SecurityHeadersMiddleware adds essential security headers to all responses
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// Based on OWASP guidelines
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func SecurityHeadersMiddleware(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Prevent clickjacking (allow framing for Swagger UI)
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if strings.HasPrefix(r.URL.Path, "/docs") {
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w.Header().Set("X-Frame-Options", "SAMEORIGIN")
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} else {
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w.Header().Set("X-Frame-Options", "DENY")
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}
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// Prevent MIME sniffing
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w.Header().Set("X-Content-Type-Options", "nosniff")
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// Enable XSS filter
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w.Header().Set("X-XSS-Protection", "1; mode=block")
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// Only send referrer for same-origin
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w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
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// Permissions policy (disable potentially dangerous features)
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w.Header().Set("Permissions-Policy", "geolocation=(), microphone=(), camera=()")
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// Content Security Policy - relaxed for Swagger UI docs
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if strings.HasPrefix(r.URL.Path, "/docs") {
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// Swagger UI needs unsafe-inline and unsafe-eval for its scripts
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w.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:")
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} else {
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w.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self'")
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}
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// HSTS - uncomment in production with HTTPS
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// w.Header().Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
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next.ServeHTTP(w, r)
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})
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}
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