Abstracts SHA256 context for NSS / OpenSSL.

base/secure_hash_openssl.cc

+// Copyright (c) 2010 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 "base/secure_hash.h"
+
+#include <openssl/ssl.h>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/openssl_util.h"
+#include "base/stl_util-inl.h"

[wtc, 2011/01/25 19:06:43]

Remove this header.

[bulach, 2011/01/25 20:33:41]

Done.

+
+namespace base {
+
+namespace {
+
+class SecureHashSHA256OpenSSL : public SecureHash {
+ public:
+  SecureHashSHA256OpenSSL() {
+    SHA256_Init(&ctx_);
+  }
+
+  virtual ~SecureHashSHA256OpenSSL() {
+    OPENSSL_cleanse(&ctx_, sizeof(ctx_));
+  }
+
+  virtual void Update(const std::string& str) {
+    SHA256_Update(&ctx_, reinterpret_cast<const unsigned char*>(str.data()),
+                  str.size());
+  }
+
+  virtual void Finish(void* output, size_t len) {
+    ScopedOpenSSLSafeSizeBuffer<SHA256_DIGEST_LENGTH> result(
+        reinterpret_cast<unsigned char*>(output), len);
+    SHA256_Final(result.safe_buffer(), &ctx_);
+  }
+
+ private:
+  SHA256_CTX ctx_;
+};
+
+}  // namespace
+
+SecureHash* SecureHash::Create(Type type) {
+  if (type == TYPE_SHA256)
+    return new SecureHashSHA256OpenSSL();
+  NOTIMPLEMENTED();
+  return NULL;

[wtc, 2011/01/25 19:06:43]

Use a switch statement.

[bulach, 2011/01/25 20:33:41]

Done.

+}
+
+}  // namespace base