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tdutils/td/utils/Slice.cpp

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#include "td/utils/Slice.h"
+#if TD_HAVE_OPENSSL
+#include <openssl/crypto.h>
+#endif
+
+namespace td {
+
+void MutableSlice::fill(char c) {
+  std::memset(data(), c, size());
+}
+void MutableSlice::fill_zero() {
+  fill(0);
+}
+void MutableSlice::fill_zero_secure() {
+#if TD_HAVE_OPENSSL
+  OPENSSL_cleanse(begin(), size());
+#else
+  volatile char *ptr = begin();
+  for (size_t i = 0; i < size(); i++) {
+    ptr[i] = 0;
+  }
+#endif
+}
+
+}  // namespace td