[webcrypto] Implement AES-CTR using BoringSSL.

content/child/webcrypto/status.h

 // 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.
 
 #ifndef CONTENT_CHILD_WEBCRYPTO_STATUS_H_
 #define CONTENT_CHILD_WEBCRYPTO_STATUS_H_
 
 #include <string>
 #include "content/common/content_export.h"
 #include "third_party/WebKit/public/platform/WebCrypto.h"
@@ skipping 126 matching lines @@
 
   // The wrong key was used for the operation. For instance, a public key was
   // used to verify a RsaSsaPkcs1v1_5 signature, or tried exporting a private
   // key using spki format.
   static Status ErrorUnexpectedKeyType();
 
   // When doing an AES-CBC encryption/decryption, the "iv" parameter was not 16
   // bytes.
   static Status ErrorIncorrectSizeAesCbcIv();
 
+  // When doing AES-CTR encryption/decryption, the "counter" parameter was not
+  // 16 bytes.
+  static Status ErrorIncorrectSizeAesCtrCounter();
+
+  // When doing AES-CTR encryption/decryption, the "length" parameter for the
+  // counter was out of range.
+  static Status ErrorInvalidAesCtrCounterLength();
+
+  // The input to encrypt/decrypt was too large. Based on the counter size, it
+  // would cause the counter to wraparound and repeat earlier values.
+  static Status ErrorAesCtrInputTooLongCounterRepeated();
+
   // The data provided to an encrypt/decrypt/sign/verify operation was too
   // large. This can either represent an internal limitation (for instance
   // representing buffer lengths as uints).
   static Status ErrorDataTooLarge();
 
   // The data provided to an encrypt/decrypt/sign/verify operation was too
   // small. This usually represents an algorithm restriction (for instance
   // AES-KW requires a minimum of 24 bytes input data).
   static Status ErrorDataTooSmall();
 
@@ skipping 54 matching lines @@
   Type type_;
   blink::WebCryptoErrorType error_type_;
   std::string error_details_;
 };
 
 }  // namespace webcrypto
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_WEBCRYPTO_STATUS_H_