2235924f37
Remove PKCE plain method support (S256 only), enforce openid scope requirement, filter to supported scopes, strip reserved claims from custom claims as defense-in-depth, sanitize SVG icons with Loofah, add global input padding, switch session cookies to SameSite=Lax, use Session.active scope, and remove unsafe-eval from CSP. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
69 lines
2.4 KiB
Ruby
69 lines
2.4 KiB
Ruby
# Be sure to restart your server when you modify this file.
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# Define an application-wide content security policy.
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# See the Securing Rails Applications Guide for more information:
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# https://guides.rubyonrails.org/security.html#content-security-policy-header
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Rails.application.configure do
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config.content_security_policy do |policy|
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# Default to self for everything, plus blob: for file downloads
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policy.default_src :self, "blob:"
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# Scripts: Allow self, importmaps, unsafe-inline for Turbo/StimulusJS, and blob: for downloads
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# Note: unsafe_inline is needed for Stimulus controllers and Turbo navigation
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policy.script_src :self, :unsafe_inline, "blob:"
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# Styles: Allow self and unsafe_inline for TailwindCSS dynamic classes
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# and Stimulus controller style manipulations
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policy.style_src :self, :unsafe_inline
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# Images: Allow self, data URLs, and https for external images
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policy.img_src :self, :data, :https
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# Fonts: Allow self and data URLs
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policy.font_src :self, :data
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# Connect: Allow self for API calls, WebAuthn, and ActionCable if needed
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# WebAuthn endpoints are on the same domain, so self is sufficient
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policy.connect_src :self, "wss:"
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# Media: Allow self
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policy.media_src :self
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# Object and embed sources: Disallow for security (no Flash/etc)
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policy.object_src :none
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policy.frame_src :none
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policy.frame_ancestors :none
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# Base URI: Restricted to self
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policy.base_uri :self
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# Form actions: Allow self for all form submissions
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# Note: OAuth redirects will be handled dynamically in the consent page
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policy.form_action :self
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# Manifest sources: Allow self for PWA manifest
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policy.manifest_src :self
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# Worker sources: Allow self for potential Web Workers
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policy.worker_src :self
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# Child sources: Allow self for any future iframes
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policy.child_src :self
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# Additional security headers for WebAuthn
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# Required for WebAuthn to work properly
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policy.require_trusted_types_for :none
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# CSP reporting using report_uri (supported method)
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policy.report_uri "/api/csp-violation-report"
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end
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# Start with CSP in report-only mode for testing
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# Set to false after verifying everything works in production
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config.content_security_policy_report_only = Rails.env.development?
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# Report CSP violations (optional - uncomment to enable)
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# config.content_security_policy_report_uri = "/csp-violations"
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end
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