Removing NSS files and USE_OPENSSL flag

crypto/secure_hash_default.cc

-// Copyright (c) 2012 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 "crypto/secure_hash.h"
-
-#include <stddef.h>
-
-#include "base/logging.h"
-#include "base/pickle.h"
-#include "crypto/third_party/nss/chromium-blapi.h"
-#include "crypto/third_party/nss/chromium-sha256.h"
-
-namespace crypto {
-
-namespace {
-
-class SecureHashSHA256NSS : public SecureHash {
- public:
-  SecureHashSHA256NSS() {
-    SHA256_Begin(&ctx_);
-  }
-
-  SecureHashSHA256NSS(const SecureHashSHA256NSS& other) {
-    SHA256_Clone(&ctx_, const_cast<SHA256Context*>(&other.ctx_));
-  }
-
-  ~SecureHashSHA256NSS() override { memset(&ctx_, 0, sizeof(ctx_)); }
-
-  // SecureHash implementation:
-  void Update(const void* input, size_t len) override {
-    SHA256_Update(&ctx_, static_cast<const unsigned char*>(input), len);
-  }
-
-  void Finish(void* output, size_t len) override {
-    SHA256_End(&ctx_, static_cast<unsigned char*>(output), NULL,
-               static_cast<unsigned int>(len));
-  }
-
-  SecureHash* Clone() const override { return new SecureHashSHA256NSS(*this); }
-
-  size_t GetHashLength() const override { return SHA256_LENGTH; }
-
- private:
-  SHA256Context ctx_;
-};
-
-}  // namespace
-
-SecureHash* SecureHash::Create(Algorithm algorithm) {
-  switch (algorithm) {
-    case SHA256:
-      return new SecureHashSHA256NSS();
-    default:
-      NOTIMPLEMENTED();
-      return NULL;
-  }
-}
-
-}  // namespace crypto