[webcrypto] Order jwk_ops the same way as Key.usages.

content/child/webcrypto/webcrypto_util.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/webcrypto_util.h"
 
 #include "base/base64.h"
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 #include "content/child/webcrypto/status.h"
@@ skipping 45 matching lines @@
   const base::StringPiece string_piece(
       reinterpret_cast<const char*>(Uint8VectorStart(input)), input.size());
   return Base64EncodeUrlSafe(string_piece);
 }
 
 struct JwkToWebCryptoUsage {
   const char* const jwk_key_op;
   const blink::WebCryptoKeyUsage webcrypto_usage;
 };
 
+// Keep this ordered according to the definition
+// order of WebCrypto's "recognized key usage
+// values".
+//
+// This is not required for spec compliance,
+// however it makes the ordering of key_ops match
+// that of WebCrypto's Key.usages.
 const JwkToWebCryptoUsage kJwkWebCryptoUsageMap[] = {
     {"encrypt", blink::WebCryptoKeyUsageEncrypt},
     {"decrypt", blink::WebCryptoKeyUsageDecrypt},
+    {"sign", blink::WebCryptoKeyUsageSign},
+    {"verify", blink::WebCryptoKeyUsageVerify},
     {"deriveKey", blink::WebCryptoKeyUsageDeriveKey},
     {"deriveBits", blink::WebCryptoKeyUsageDeriveBits},
-    {"sign", blink::WebCryptoKeyUsageSign},
-    {"unwrapKey", blink::WebCryptoKeyUsageUnwrapKey},
-    {"verify", blink::WebCryptoKeyUsageVerify},
-    {"wrapKey", blink::WebCryptoKeyUsageWrapKey}};
+    {"wrapKey", blink::WebCryptoKeyUsageWrapKey},
+    {"unwrapKey", blink::WebCryptoKeyUsageUnwrapKey}};
 
 // Modifies the input usage_mask by according to the key_op value.
 bool JwkKeyOpToWebCryptoUsage(const std::string& key_op,
                               blink::WebCryptoKeyUsageMask* usage_mask) {
   for (size_t i = 0; i < arraysize(kJwkWebCryptoUsageMap); ++i) {
     if (kJwkWebCryptoUsageMap[i].jwk_key_op == key_op) {
       *usage_mask |= kJwkWebCryptoUsageMap[i].webcrypto_usage;
       return true;
     }
   }
@@ skipping 106 matching lines @@
 
 bool IsAlgorithmAsymmetric(blink::WebCryptoAlgorithmId alg_id) {
   // TODO(padolph): include all other asymmetric algorithms once they are
   // defined, e.g. EC and DH.
   return IsAlgorithmRsa(alg_id);
 }
 
 }  // namespace webcrypto
 
 }  // namespace content