fi
AM_CONDITIONAL(USE_NLS, [test "$USE_NLS" = "yes"])
+AC_ARG_WITH([system-cafile],
+ AS_HELP_STRING([--with-system-cafile],
+ [Location of the default system CA certificate file for old (<3.0.20) GnuTLS versions]))
+
# We will use GnuTLS if it's requested, and if GnuTLS doesn't have DTLS
# support then we'll *also* use OpenSSL for that, but it appears *only*
# only in the openconnect executable and not the library (hence shouldn't
[AC_DEFINE(HAVE_GNUTLS_DTLS_SET_DATA_MTU, 1)], [])
AC_CHECK_FUNC(gnutls_certificate_set_x509_system_trust,
[AC_DEFINE(HAVE_GNUTLS_CERTIFICATE_SET_X509_SYSTEM_TRUST, 1)], [])
+ if test "$ac_cv_func_gnutls_certificate_set_x509_system_trust" != "yes"; then
+ # We will need to tell GnuTLS the path to the system CA file.
+ if test "$with_system_cafile" = "yes" || test "$with_system_cafile" = ""; then
+ unset with_system_cafile
+ AC_MSG_CHECKING([For location of system CA trust file])
+ for file in /etc/ssl/certs/ca-certificates.crt \
+ /etc/pki/tls/cert.pem \
+ /usr/local/share/certs/ca-root-nss.crt \
+ /etc/ssl/cert.pem; do
+ if grep 'BEGIN CERTIFICATE-----' $file >/dev/null 2>&1; then
+ with_system_cafile=${file}
+ break
+ fi
+ done
+ AC_MSG_RESULT([${with_system_cafile-NOT FOUND}])
+ elif test "$with_system_cafile" = "no"; then
+ AC_MSG_ERROR([You cannot disable the system CA certificate file.])
+ fi
+ if test "$with_system_cafile" = ""; then
+ AC_MSG_ERROR([Unable to find a standard system CA certificate file.]
+ [Your GnuTLS requires a path to a CA certificate store. This is a file]
+ [which contains a list of the Certificate Authorities which are trusted.]
+ [Most distributions ship with this file in a standard location, but none]
+ [the known standard locations exist on your system. You should provide a]
+ [--with-system-cafile= argument to this configure script, giving the full]
+ [path to a default CA certificate file for GnuTLS to use. Also, please]
+ [send full details of your system, including 'uname -a' output and the]
+ [location of the system CA certificate store on your system, to the]
+ [openconnect-devel@lists.infradead.org mailing list.])
+ fi
+ AC_DEFINE_UNQUOTED([DEFAULT_SYSTEM_CAFILE], ["$with_system_cafile"])
+ fi
AC_CHECK_FUNC(gnutls_pkcs12_simple_parse,
[AC_DEFINE(HAVE_GNUTLS_PKCS12_SIMPLE_PARSE, 1)], [])
AC_CHECK_FUNC(gnutls_certificate_set_key,