[webcrypto] Add RSASSA-PKCS1-v1_5 sign and verify for NSS.

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 b5a318a1be2b9a99721c737520c947a442f7172a..53cd2fafc9429a9c9eecd1e106e3ddbc93956c02 100644
--- a/content/renderer/webcrypto/webcrypto_util.cc
+++ b/content/renderer/webcrypto/webcrypto_util.cc
@@ -73,14 +73,25 @@ bool Base64DecodeUrlSafe(const std::string& input, std::string* output) {
 
 blink::WebCryptoAlgorithm GetInnerHashAlgorithm(
     const blink::WebCryptoAlgorithm& algorithm) {
-  if (algorithm.hmacParams())
-    return algorithm.hmacParams()->hash();
-  if (algorithm.hmacKeyParams())
-    return algorithm.hmacKeyParams()->hash();
-  if (algorithm.rsaSsaParams())
-    return algorithm.rsaSsaParams()->hash();
-  if (algorithm.rsaOaepParams())
-    return algorithm.rsaOaepParams()->hash();
+  DCHECK(!algorithm.isNull());
+  switch (algorithm.id()) {
+    case blink::WebCryptoAlgorithmIdHmac:
+      if (algorithm.hmacParams())
+        return algorithm.hmacParams()->hash();
+      else if (algorithm.hmacKeyParams())
+        return algorithm.hmacKeyParams()->hash();
+      break;
+    case blink::WebCryptoAlgorithmIdRsaOaep:
+      if (algorithm.rsaOaepParams())
+        return algorithm.rsaOaepParams()->hash();
+      break;
+    case blink::WebCryptoAlgorithmIdRsaSsaPkcs1v1_5:
+      if (algorithm.rsaSsaParams())
+        return algorithm.rsaSsaParams()->hash();
+      break;
+    default:
+      break;
+  }
   return blink::WebCryptoAlgorithm::createNull();
 }