error code if dac and pai both are revoked

Author: shubhamdp

src/credentials/attestation_verifier/DeviceAttestationVerifier.h

@@ -79,6 +79,8 @@ enum class AttestationVerificationResult : uint16_t
 
     kInternalError = 900,
 
+    kPaiAndDacRevoked = 1000,
+
     kNotImplemented = 0xFFFFU,
 
     // TODO: Add more attestation verification errors

src/credentials/attestation_verifier/TestDACRevocationDelegateImpl.cpp

@@ -186,10 +186,17 @@ void TestDACRevocationDelegateImpl::CheckForRevokedDACChain(
         if (IsCertificateRevoked(info.paiDerBuffer))
         {
             ChipLogProgress(NotSpecified, "Found revoked PAI in %s", mDeviceAttestationRevocationSetPath);
-            attestationError = AttestationVerificationResult::kPaiRevoked;
+
+            if (attestationError == AttestationVerificationResult::kDacRevoked)
+            {
+                attestationError = AttestationVerificationResult::kPaiAndDacRevoked;
+            }
+            else
+            {
+                attestationError = AttestationVerificationResult::kPaiRevoked;
+            }
         }
     }
-
     onCompletion->mCall(onCompletion->mContext, info, attestationError);
 }