Cast device revocation checking.

components/cast_certificate/cast_cert_validator.h

Index: components/cast_certificate/cast_cert_validator.h
diff --git a/components/cast_certificate/cast_cert_validator.h b/components/cast_certificate/cast_cert_validator.h
index 1c335ae6530b446a86bf234d00ac39f5774a0c7f..df3cbc12a9bf9bbe03bb5cc6d2aabdc34b2099a1 100644
--- a/components/cast_certificate/cast_cert_validator.h
+++ b/components/cast_certificate/cast_cert_validator.h
@@ -16,6 +16,8 @@
 
 namespace cast_certificate {
 
+class CastCRL;
+
 // Describes the policy for a Device certificate.
 enum class CastDeviceCertPolicy {
   // The device certificate is unrestricted.
@@ -25,6 +27,13 @@ enum class CastDeviceCertPolicy {
   AUDIO_ONLY,
 };
 
+struct CRLOptions {
+  // If set to false, then revocation is only checked if a CRL is provided.
+  // If set to true, then revocation is always checked. An empty CRL results
+  // in failure.
+  bool crl_required = true;
+};
+
 // An object of this type is returned by the VerifyDeviceCert function, and can
 // be used for additional certificate-related operations, using the verified
 // certificate.
@@ -61,6 +70,14 @@ class CertVerificationContext {
 // * |time| is the UTC time to use for determining if the certificate
 //   is expired.
 //
+// * |crl| is the CRL to check for certificate revocation status.
+//   If this is a nullptr, then revocation checking is currently disabled.
+//
+//
+// * |crl_options| is for choosing how to handle the absence of a CRL
+//   If crl_required is set to true, then an empty |crl| input would result
+//   in a failed verification. Otherwise, |crl| is ignored if it is absent.
+//
 // Outputs:
 //
 // Returns true on success, false on failure. On success the output
@@ -74,7 +91,9 @@ class CertVerificationContext {
 bool VerifyDeviceCert(const std::vector<std::string>& certs,
                       const base::Time::Exploded& time,
                       std::unique_ptr<CertVerificationContext>* context,
-                      CastDeviceCertPolicy* policy) WARN_UNUSED_RESULT;
+                      CastDeviceCertPolicy* policy,
+                      const CastCRL* crl,
+                      CRLOptions crl_options) WARN_UNUSED_RESULT;
 
 // Exposed only for unit-tests, not for use in production code.
 // Production code would get a context from VerifyDeviceCert().