Reject deriveBits() for PBKDF2 when given a length of 0.

components/webcrypto/status.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 "components/webcrypto/status.h"
 
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 
 namespace webcrypto {
@@ skipping 333 matching lines @@
       blink::WebCryptoErrorTypeOperation,
       "Length for PBKDF2 key derivation must be a multiple of 8 bits.");
 }
 
 Status Status::ErrorPbkdf2DeriveBitsLengthNotSpecified() {
   return Status(
       blink::WebCryptoErrorTypeOperation,
       "No length was specified for the PBKDF2 Derive Bits operation.");
 }
 
+Status Status::ErrorPbkdf2DeriveBitsLengthZero() {
+  return Status(
+      blink::WebCryptoErrorTypeOperation,
+      "A length of 0 was specified for PBKDF2's Derive Bits operation.");
+}
+
 Status Status::ErrorPbkdf2Iterations0() {
   return Status(blink::WebCryptoErrorTypeOperation,
                 "PBKDF2 requires iterations > 0");
 }
 
 Status::Status(blink::WebCryptoErrorType error_type,
                const std::string& error_details_utf8)
     : type_(TYPE_ERROR),
       error_type_(error_type),
       error_details_(error_details_utf8) {
 }
 
 Status::Status(Type type) : type_(type) {
 }
 
 }  // namespace webcrypto