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Replace explicit_bzero with ssh_burn

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Signed-off-by: abdallah elhdad <abdallahselhdad@gmail.com>
Reviewed-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
abdallah elhdad
2025-11-21 18:33:22 +02:00
committed by Jakub Jelen
parent 0ef79018b3
commit 64f72ed55f
26 changed files with 106 additions and 99 deletions
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26
include/libssh/priv.h
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@@ -365,9 +365,29 @@ int ssh_connector_remove_event(ssh_connector connector);
/** Get the size of an array */
#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
#ifndef HAVE_EXPLICIT_BZERO
void explicit_bzero(void *s, size_t n);
#endif /* !HAVE_EXPLICIT_BZERO */
/** Securely zero memory in a way that won't be optimized away */
#if defined(HAVE_MEMSET_EXPLICIT)
#define ssh_burn(ptr, len) memset_explicit((ptr), '\0', (len))
#elif defined(HAVE_EXPLICIT_BZERO)
#define ssh_burn(ptr, len) explicit_bzero((ptr), (len))
#elif defined(HAVE_MEMSET_S)
#define ssh_burn(ptr, len) memset_s((ptr), (len), '\0', (len))
#elif defined(HAVE_SECURE_ZERO_MEMORY)
#define ssh_burn(ptr, len) SecureZeroMemory((ptr), (len))
#else
#if defined(HAVE_GCC_VOLATILE_MEMORY_PROTECTION)
#define ssh_burn(ptr, len) \
do { \
memset((ptr), '\0', (len)); \
__asm__ volatile("" : : "g"(ptr) : "memory"); \
} while (0)
#else
#define ssh_burn(ptr, len) \
do { \
memset((ptr), '\0', (len)); \
} while (0)
#endif
#endif
void burn_free(void *ptr, size_t len);