crypto: switch hash code to use nettle/gcrypt directly

Currently the internal hash code is using the gnutls hash APIs.
GNUTLS in turn is wrapping either nettle or gcrypt. Not only
were the GNUTLS hash APIs not added until GNUTLS 2.9.10, but
they don't expose support for all the algorithms QEMU needs
to use with LUKS.

Address this by directly wrapping nettle/gcrypt in QEMU and
avoiding GNUTLS's extra layer of indirection. This gives us
support for hash functions on a much wider range of platforms
and opens up ability to support more hash functions. It also
avoids a GNUTLS bug which would not correctly handle hashing
of large data blocks if int != size_t.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

1 files changed, 0 insertions, 14 deletions

diff --git a/configure b/configure
index 93e4c95274..65bd1ff86c 100755
--- a/configure
+++ b/configure
@@ -306,7 +306,6 @@ gtk=""
 gtkabi=""
 gtk_gl="no"
 gnutls=""
-gnutls_hash=""
 gnutls_rnd=""
 nettle=""
 nettle_kdf="no"
@@ -2218,13 +2217,6 @@ if test "$gnutls" != "no"; then
 	QEMU_CFLAGS="$QEMU_CFLAGS $gnutls_cflags"
         gnutls="yes"
 
-	# gnutls_hash_init requires >= 2.9.10
-	if $pkg_config --exists "gnutls >= 2.9.10"; then
-            gnutls_hash="yes"
-	else
-	    gnutls_hash="no"
-	fi
-
 	# gnutls_rnd requires >= 2.11.0
 	if $pkg_config --exists "gnutls >= 2.11.0"; then
 	    gnutls_rnd="yes"
@@ -2258,11 +2250,9 @@ if test "$gnutls" != "no"; then
 	feature_not_found "gnutls" "Install gnutls devel"
     else
         gnutls="no"
-        gnutls_hash="no"
         gnutls_rnd="no"
     fi
 else
-    gnutls_hash="no"
     gnutls_rnd="no"
 fi
 
@@ -4813,7 +4803,6 @@ echo "GTK support       $gtk $(echo_version $gtk $gtk_version)"
 echo "GTK GL support    $gtk_gl"
 echo "VTE support       $vte $(echo_version $vte $vteversion)"
 echo "GNUTLS support    $gnutls"
-echo "GNUTLS hash       $gnutls_hash"
 echo "GNUTLS rnd        $gnutls_rnd"
 echo "libgcrypt         $gcrypt"
 echo "libgcrypt kdf     $gcrypt_kdf"
@@ -5179,9 +5168,6 @@ fi
 if test "$gnutls" = "yes" ; then
   echo "CONFIG_GNUTLS=y" >> $config_host_mak
 fi
-if test "$gnutls_hash" = "yes" ; then
-  echo "CONFIG_GNUTLS_HASH=y" >> $config_host_mak
-fi
 if test "$gnutls_rnd" = "yes" ; then
   echo "CONFIG_GNUTLS_RND=y" >> $config_host_mak
 fi