diff options
| author | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-01-16 13:25:38 +0000 |
|---|---|---|
| committer | Antonio Nino Diaz <antonio.ninodiaz@arm.com> | 2017-01-24 14:42:12 +0000 |
| commit | aa050a7bdb943ca94ab914f2a9dc508e09a57431 (patch) | |
| tree | 5a97cdc90d14dcfca121ba20ae5c97f92324231e /include/lib/stdlib | |
| parent | 34438669d41a648e4dcf6fd93e1a1f1f7eee0482 (diff) | |
stdlib: Import timingsafe_bcmp() from FreeBSD
Some side-channel attacks involve an attacker inferring something from
the time taken for a memory compare operation to complete, for example
when comparing hashes during image authentication. To mitigate this,
timingsafe_bcmp() must be used for such operations instead of the
standard memcmp().
This function executes in constant time and so doesn't leak any timing
information to the caller.
Change-Id: I470a723dc3626a0ee6d5e3f7fd48d0a57b8aa5fd
Signed-off-by: dp-arm <dimitris.papastamos@arm.com>
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
Diffstat (limited to 'include/lib/stdlib')
| -rw-r--r-- | include/lib/stdlib/string.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/lib/stdlib/string.h b/include/lib/stdlib/string.h index 9beeb448..902d9c13 100644 --- a/include/lib/stdlib/string.h +++ b/include/lib/stdlib/string.h @@ -61,6 +61,7 @@ size_t strlen(const char *) __pure; int strncmp(const char *, const char *, size_t) __pure; size_t strnlen(const char *, size_t) __pure; int strcasecmp(const char *, const char *); +int timingsafe_bcmp(const void *, const void *, size_t); __END_DECLS |