crypto: add support for nettle's native XTS impl
Nettle 3.5.0 will add support for the XTS mode. Use this because long
term we wish to delete QEMU's XTS impl to avoid carrying private crypto
algorithm impls.
Unfortunately this degrades nettle performance from 612 MB/s to 568 MB/s
as nettle's XTS impl isn't so well optimized yet.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
diff --git a/configure b/configure
index d1e9e45..452c2df 100755
--- a/configure
+++ b/configure
@@ -472,6 +472,7 @@
tls_priority="NORMAL"
gnutls=""
nettle=""
+nettle_xts="no"
gcrypt=""
gcrypt_hmac="no"
gcrypt_xts="no"
@@ -2871,6 +2872,19 @@
pass="yes"
fi
fi
+ if test "$pass" = "yes"
+ then
+ cat > $TMPC << EOF
+#include <nettle/xts.h>
+int main(void) {
+ return 0;
+}
+EOF
+ if compile_prog "$nettle_cflags" "$nettle_libs" ; then
+ nettle_xts=yes
+ qemu_private_xts=no
+ fi
+ fi
if test "$pass" = "no" && test "$nettle" = "yes"; then
feature_not_found "nettle" "Install nettle devel >= 2.7.1"
else
@@ -6346,6 +6360,10 @@
echo " XTS $gcrypt_xts"
fi
echo "nettle $nettle $(echo_version $nettle $nettle_version)"
+if test "$nettle" = "yes"
+then
+ echo " XTS $nettle_xts"
+fi
echo "libtasn1 $tasn1"
echo "PAM $auth_pam"
echo "iconv support $iconv"
