Refactor to share more code between OpenSSL and NSS implementations.

content/renderer/webcrypto/webcrypto_util.cc

Index: content/renderer/webcrypto/webcrypto_util.cc
diff --git a/content/renderer/webcrypto/webcrypto_util.cc b/content/renderer/webcrypto/webcrypto_util.cc
index 3124afa7dfdf2594f575ba43149d29a155896d17..c74eebf63bb09858ffb109781ad845079061407a 100644
--- a/content/renderer/webcrypto/webcrypto_util.cc
+++ b/content/renderer/webcrypto/webcrypto_util.cc
@@ -107,6 +107,10 @@ Status Status::ErrorUnexpectedKeyType() {
   return Status("The key is not of the expected type");
 }
 
+Status Status::ErrorKeyAlgorithmMismatch() {
+  return Status("The key's algorithm doesn't match that of operation");
+}
+
 Status Status::ErrorIncorrectSizeAesCbcIv() {
   return Status("The \"iv\" has an unexpected length -- must be 16 bytes");
 }
@@ -326,6 +330,14 @@ unsigned int ShaBlockSizeBytes(blink::WebCryptoAlgorithmId hash_id) {
   }
 }
 
+bool IsAlgorithmAsymmetric(const blink::WebCryptoAlgorithm& algorithm) {
+  // TODO(padolph): include all other asymmetric algorithms once they are
+  // defined, e.g. EC and DH.
+  return (algorithm.id() == blink::WebCryptoAlgorithmIdRsaEsPkcs1v1_5 ||
+          algorithm.id() == blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5 ||
+          algorithm.id() == blink::WebCryptoAlgorithmIdRsaOaep);
+}
+
 }  // namespace webcrypto
 
 }  // namespace content