diff options
| author | Heikki Linnakangas | 2025-04-02 12:32:40 +0000 |
|---|---|---|
| committer | Heikki Linnakangas | 2025-04-02 12:32:40 +0000 |
| commit | 09be39112654c3f158098fdb5f820143c0330763 (patch) | |
| tree | 1864a2d06bac4af18cd9c62dbd2db638a8815991 /configure | |
| parent | 85d799ba8a7fe3f6a462fcccbb449e08d21f4ea4 (diff) | |
Add timingsafe_bcmp(), for constant-time memory comparison
timingsafe_bcmp() should be used instead of memcmp() or a naive
for-loop, when comparing passwords or secret tokens, to avoid leaking
information about the secret token by timing. This commit just
introduces the function but does not change any existing code to use
it yet.
Co-authored-by: Jelte Fennema-Nio <github-tech@jeltef.nl>
Discussion: https://www.postgresql.org/message-id/7b86da3b-9356-4e50-aa1b-56570825e234@iki.fi
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/configure b/configure index 3d0e701c745..3c19e7e60ec 100755 --- a/configure +++ b/configure @@ -15927,6 +15927,16 @@ fi cat >>confdefs.h <<_ACEOF #define HAVE_DECL_STRSEP $ac_have_decl _ACEOF +ac_fn_c_check_decl "$LINENO" "timingsafe_bcmp" "ac_cv_have_decl_timingsafe_bcmp" "$ac_includes_default" +if test "x$ac_cv_have_decl_timingsafe_bcmp" = xyes; then : + ac_have_decl=1 +else + ac_have_decl=0 +fi + +cat >>confdefs.h <<_ACEOF +#define HAVE_DECL_TIMINGSAFE_BCMP $ac_have_decl +_ACEOF # We can't use AC_CHECK_FUNCS to detect these functions, because it @@ -16099,6 +16109,19 @@ esac fi +ac_fn_c_check_func "$LINENO" "timingsafe_bcmp" "ac_cv_func_timingsafe_bcmp" +if test "x$ac_cv_func_timingsafe_bcmp" = xyes; then : + $as_echo "#define HAVE_TIMINGSAFE_BCMP 1" >>confdefs.h + +else + case " $LIBOBJS " in + *" timingsafe_bcmp.$ac_objext "* ) ;; + *) LIBOBJS="$LIBOBJS timingsafe_bcmp.$ac_objext" + ;; +esac + +fi + ac_fn_c_check_func "$LINENO" "pthread_barrier_wait" "ac_cv_func_pthread_barrier_wait" |