diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/configure.in b/configure.in index be76ae851..5bf99545f 100644 --- a/configure.in +++ b/configure.in @@ -41,6 +41,7 @@ ARG_WITH_SUBST([routing-table], [220], [set routing table to use for IPsec ARG_WITH_SUBST([routing-table-prio], [220], [set priority for IPsec routing table]) ARG_WITH_SET([capabilities], [no], [set capability dropping library. Currently only the value "libcap" is supported]) +ARG_WITH_SET([mpz_powm_sec], [yes], [use the more side-channel resistant mpz_powm_sec in libgmp, if available]) AC_ARG_WITH( [xauth-module], @@ -432,7 +433,21 @@ if test x$vstr = xtrue; then fi if test x$gmp = xtrue; then - AC_HAVE_LIBRARY([gmp],[LIBS="$LIBS"],[AC_MSG_ERROR([GNU Multi Precision library gmp not found])]) + saved_LIBS=$LIBS + AC_HAVE_LIBRARY([gmp],,[AC_MSG_ERROR([GNU Multi Precision library gmp not found])]) + AC_MSG_CHECKING([mpz_powm_sec]) + if test x$mpz_powm_sec = xyes; then + AC_TRY_COMPILE( + [#include "gmp.h"], + [ + void *x = mpz_powm_sec; + ], + [AC_MSG_RESULT([yes]); AC_DEFINE(HAVE_MPZ_POWM_SEC)], [AC_MSG_RESULT([no])] + ) + else + AC_MSG_RESULT([disabled]) + fi + LIBS=$saved_LIBS AC_MSG_CHECKING([gmp.h version >= 4.1.4]) AC_TRY_COMPILE( [#include "gmp.h"], |