Rosa Gutierrez
51 lines
1.5 KiB
Ruby
51 lines
1.5 KiB
Ruby
module RequestForgeryProtection
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extend ActiveSupport::Concern
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included do
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after_action :append_sec_fetch_site_to_vary_header
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end
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private
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def append_sec_fetch_site_to_vary_header
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vary_header = response.headers["Vary"].to_s.split(",").map(&:strip).reject(&:blank?)
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response.headers["Vary"] = (vary_header + [ "Sec-Fetch-Site" ]).join(",")
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end
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def verified_request?
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return true if request.get? || request.head? || !protect_against_forgery?
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origin = valid_request_origin?
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token = any_authenticity_token_valid?
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sec_fetch_site = safe_fetch_site?
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report_on_forgery_protection_results(origin:, token:, sec_fetch_site:)
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origin && token
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end
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SAFE_FETCH_SITES = %w[ same-origin same-site ]
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def safe_fetch_site?
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SAFE_FETCH_SITES.include?(sec_fetch_site_value)
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end
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def sec_fetch_site_value
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request.headers["Sec-Fetch-Site"].to_s.downcase
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end
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def report_on_forgery_protection_results(origin:, token:, sec_fetch_site:)
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results = { origin:, token:, sec_fetch_site: }
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unless results.values.all?
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info = results.transform_values { it ? "pass" : "fail" }
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info[:origin] += " (#{request.origin})"
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info[:sec_fetch_site] += " (#{sec_fetch_site_value})"
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Rails.logger.info "CSRF protection check: " + info.map { it.join(" ") }.join(", ")
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if (origin && token) != sec_fetch_site
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Sentry.capture_message "CSRF protection mismatch", level: :info, extra: { info: info }
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end
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end
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end
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end
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