Refactor: Extract some duplicated code for verifying usages during import of asymmetric key.

content/child/webcrypto/nss/rsa_key_nss.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/nss/rsa_key_nss.h"
 
 #include <secasn1.h>
 
 #include "base/logging.h"
 #include "content/child/webcrypto/crypto_data.h"
@@ skipping 570 matching lines @@
       private_key_handle.release(), blink::WebCryptoKeyTypePrivate, extractable,
       key_algorithm, private_usages);
 
   result->AssignKeyPair(public_key, private_key);
   return Status::Success();
 }
 
 Status RsaHashedAlgorithm::VerifyKeyUsagesBeforeImportKey(
     blink::WebCryptoKeyFormat format,
     blink::WebCryptoKeyUsageMask usages) const {
-  switch (format) {
-    case blink::WebCryptoKeyFormatSpki:
-      return CheckKeyCreationUsages(all_public_key_usages_, usages);
-    case blink::WebCryptoKeyFormatPkcs8:
-      return CheckKeyCreationUsages(all_private_key_usages_, usages);
-    case blink::WebCryptoKeyFormatJwk:
-      // The JWK could represent either a public key or private key. The usages
-      // must make sense for one of the two. The usages will be checked again by
-      // ImportKeyJwk() once the key type has been determined.
-      if (CheckKeyCreationUsages(all_private_key_usages_, usages).IsSuccess() ||
-          CheckKeyCreationUsages(all_public_key_usages_, usages).IsSuccess()) {
-        return Status::Success();
-      }
-      return Status::ErrorCreateKeyBadUsages();
-    default:
-      return Status::ErrorUnsupportedImportKeyFormat();
-  }
+  return VerifyUsagesBeforeImportAsymmetricKey(format, all_public_key_usages_,
+                                               all_private_key_usages_, usages);
 }
 
 Status RsaHashedAlgorithm::ImportKeyPkcs8(
     const CryptoData& key_data,
     const blink::WebCryptoAlgorithm& algorithm,
     bool extractable,
     blink::WebCryptoKeyUsageMask usages,
     blink::WebCryptoKey* key) const {
   Status status = NssSupportsRsaPrivateKeyImport();
   if (status.IsError())
@@ skipping 260 matching lines @@
                  key->algorithm().rsaHashedParams()->publicExponent().size())) {
     return Status::ErrorUnexpected();
   }
 
   return Status::Success();
 }
 
 }  // namespace webcrypto
 
 }  // namespace content