1 files changed, 55 insertions, 0 deletions
diff --git a/util/crypto/secure_hash.cc b/util/crypto/secure_hash.cc
new file mode 100644
index 00000000..14ed726a
--- /dev/null
+++ b/util/crypto/secure_hash.cc
@@ -0,0 +1,55 @@
+// Copyright 2019 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 "util/crypto/secure_hash.h"
+
+#include <stddef.h>
+
+#include <cstring>
+
+#include "openssl/mem.h"
+#include "platform/api/logging.h"
+#include "util/crypto/openssl_util.h"
+
+namespace openscreen {
+
+SecureHash::SecureHash(const EVP_MD* type) {
+  EVP_DigestInit(ctx_.get(), type);
+}
+
+SecureHash::SecureHash(const SecureHash& other) {
+  *this = other;
+}
+
+SecureHash& SecureHash::operator=(const SecureHash& other) {
+  EVP_MD_CTX_copy_ex(this->ctx_.get(), other.ctx_.get());
+  return *this;
+}
+
+SecureHash::SecureHash(SecureHash&& other) = default;
+SecureHash& SecureHash::operator=(SecureHash&& other) = default;
+
+SecureHash::~SecureHash() = default;
+
+void SecureHash::Update(const uint8_t* input, size_t len) {
+  EVP_DigestUpdate(ctx_.get(), input, len);
+}
+
+void SecureHash::Finish(uint8_t* output) {
+  EVP_DigestFinal(ctx_.get(), output, nullptr);
+}
+
+void SecureHash::Update(const std::string& input) {
+  Update(reinterpret_cast<const uint8_t*>(input.data()), input.length());
+}
+
+void SecureHash::Finish(char* output) {
+  Finish(reinterpret_cast<uint8_t*>(output));
+}
+
+size_t SecureHash::GetHashLength() const {
+  return EVP_MD_CTX_size(ctx_.get());
+}
+
+}  // namespace openscreen