Refactor: Extract common code for generating asymmetric keys to a helper.

content/child/webcrypto/openssl/ec_key_openssl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/webcrypto/openssl/ec_key_openssl.h"
 
 #include <openssl/ec.h>
 #include <openssl/ec_key.h>
 #include <openssl/evp.h>
 #include <openssl/pkcs12.h>
@@ skipping 190 matching lines @@
 
   return Status::Success();
 }
 
 }  // namespace
 
 Status EcAlgorithm::GenerateKey(const blink::WebCryptoAlgorithm& algorithm,
                                 bool extractable,
                                 blink::WebCryptoKeyUsageMask combined_usages,
                                 GenerateKeyResult* result) const {
-  Status status = CheckKeyCreationUsages(
-      all_public_key_usages_ | all_private_key_usages_, combined_usages);
+  blink::WebCryptoKeyUsageMask public_usages = 0;
+  blink::WebCryptoKeyUsageMask private_usages = 0;
+
+  Status status = GetUsagesForGenerateAsymmetricKey(
+      all_public_key_usages_, all_private_key_usages_, combined_usages,
+      &public_usages, &private_usages);
   if (status.IsError())
     return status;
 
-  const blink::WebCryptoKeyUsageMask public_usages =
-      combined_usages & all_public_key_usages_;
-  const blink::WebCryptoKeyUsageMask private_usages =
-      combined_usages & all_private_key_usages_;
-
-  if (private_usages == 0)
-    return Status::ErrorCreateKeyEmptyUsages();
-
   const blink::WebCryptoEcKeyGenParams* params = algorithm.ecKeyGenParams();
 
   crypto::OpenSSLErrStackTracer err_tracer(FROM_HERE);
 
   // Generate an EC key pair.
   crypto::ScopedEC_KEY ec_private_key;
   status = CreateEC_KEY(params->namedCurve(), &ec_private_key);
   if (status.IsError())
     return status;
 
@@ skipping 337 matching lines @@
       key->algorithm().ecParams()->namedCurve()) {
     return Status::ErrorUnexpected();
   }
 
   return Status::Success();
 }
 
 }  // namespace webcrypto
 
 }  // namespace content