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77b9617cd7
This is available on at least FreeBSD and GLibc >= 2.25. Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* virsecureerase.c: Secure clearing of memory
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include <string.h>
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#include "virsecureerase.h"
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/**
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* virSecureErase:
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* @ptr: pointer to memory to clear
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* @size: size of memory to clear
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*
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* Clear @size bytes of memory at @ptr.
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*
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* Note that for now this is implemented using memset which is not secure as
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* it can be optimized out.
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*
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* Also note that there are possible leftover direct uses of memset.
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*/
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void
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virSecureErase(void *ptr,
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size_t size)
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{
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if (!ptr || size == 0)
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return;
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#ifdef WITH_EXPLICIT_BZERO
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explicit_bzero(ptr, size);
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#else
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memset(ptr, 0, size);
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#endif
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}
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/**
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* virSecureEraseString:
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* @str: String to securely erase
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*/
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void
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virSecureEraseString(char *str)
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{
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if (!str)
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return;
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virSecureErase(str, strlen(str));
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}
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