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Diffstat (limited to 'lib/isc/include/isc/safe.h')
-rw-r--r-- | lib/isc/include/isc/safe.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/isc/include/isc/safe.h b/lib/isc/include/isc/safe.h new file mode 100644 index 0000000..35e7759 --- /dev/null +++ b/lib/isc/include/isc/safe.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/safe.h */ + +#include <isc/lang.h> + +ISC_LANG_BEGINDECLS + +int +isc_safe_memequal(const void *, const void *, size_t); + +/*%< + * Returns true iff. two blocks of memory are equal, otherwise + * false. + * + */ + +void +isc_safe_memwipe(void *, size_t); + +/*%< + * Clear the memory of length `len` pointed to by `ptr`. + * + * Some crypto code calls memset() on stack allocated buffers just + * before return so that they are wiped. Such memset() calls can be + * optimized away by the compiler. We provide this external non-inline C + * function to perform the memset operation so that the compiler cannot + * infer about what the function does and optimize the call away. + */ + +ISC_LANG_ENDDECLS |