@@ -2170,6 +2170,7 @@ fi
# GNUTLS probe
gnutls_gcrypt=no
+gnutls_nettle=no
if test "$gnutls" != "no"; then
if $pkg_config --exists "gnutls"; then
gnutls_cflags=`$pkg_config --cflags gnutls`
@@ -2188,14 +2189,25 @@ if test "$gnutls" != "no"; then
if $pkg_config --exists 'gnutls >= 3.0'; then
gnutls_gcrypt=no
+ gnutls_nettle=yes
elif $pkg_config --exists 'gnutls >= 2.12'; then
case `$pkg_config --libs --static gnutls` in
- *gcrypt*) gnutls_gcrypt=yes ;;
- *nettle*) gnutls_gcrypt=no ;;
- *) gnutls_gcrypt=yes ;;
+ *gcrypt*)
+ gnutls_gcrypt=yes
+ gnutls_nettle=no
+ ;;
+ *nettle*)
+ gnutls_gcrypt=no
+ gnutls_nettle=yes
+ ;;
+ *)
+ gnutls_gcrypt=yes
+ gnutls_nettle=no
+ ;;
esac
else
gnutls_gcrypt=yes
+ gnutls_nettle=no
fi
elif test "$gnutls" = "yes"; then
feature_not_found "gnutls" "Install gnutls devel"
@@ -2220,6 +2232,19 @@ if test "$gnutls_gcrypt" != "no"; then
fi
+if test "$gnutls_nettle" != "no"; then
+ if $pkg_config --exists "nettle"; then
+ nettle_cflags=`$pkg_config --cflags nettle`
+ nettle_libs=`$pkg_config --libs nettle`
+ libs_softmmu="$nettle_libs $libs_softmmu"
+ libs_tools="$nettle_libs $libs_tools"
+ QEMU_CFLAGS="$QEMU_CFLAGS $nettle_cflags"
+ else
+ feature_not_found "nettle" "Install nettle devel"
+ fi
+fi
+
+
##########################################
# VTE probe
@@ -4482,6 +4507,7 @@ echo "GTK support $gtk"
echo "GNUTLS support $gnutls"
echo "GNUTLS hash $gnutls_hash"
echo "GNUTLS gcrypt $gnutls_gcrypt"
+echo "GNUTLS nettle $gnutls_nettle"
echo "VTE support $vte"
echo "curses support $curses"
echo "curl support $curl"
@@ -4840,6 +4866,9 @@ fi
if test "$gnutls_gcrypt" = "yes" ; then
echo "CONFIG_GNUTLS_GCRYPT=y" >> $config_host_mak
fi
+if test "$gnutls_nettle" = "yes" ; then
+ echo "CONFIG_GNUTLS_NETTLE=y" >> $config_host_mak
+fi
if test "$vte" = "yes" ; then
echo "CONFIG_VTE=y" >> $config_host_mak
echo "VTE_CFLAGS=$vte_cflags" >> $config_host_mak
new file mode 100644
@@ -0,0 +1,206 @@
+/*
+ * QEMU Crypto cipher nettle algorithms
+ *
+ * Copyright (c) 2015 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <nettle/nettle-types.h>
+#include <nettle/aes.h>
+#include <nettle/des.h>
+#include <nettle/cbc.h>
+
+typedef struct QCryptoCipherNettle QCryptoCipherNettle;
+struct QCryptoCipherNettle {
+ void *ctx_encrypt;
+ void *ctx_decrypt;
+ nettle_crypt_func *alg_encrypt;
+ nettle_crypt_func *alg_decrypt;
+ uint8_t *iv;
+ size_t niv;
+};
+
+bool qcrypto_cipher_supports(QCryptoCipherAlgorithm alg)
+{
+ switch (alg) {
+ case QCRYPTO_CIPHER_ALG_DES_RFB:
+ case QCRYPTO_CIPHER_ALG_AES_128:
+ case QCRYPTO_CIPHER_ALG_AES_192:
+ case QCRYPTO_CIPHER_ALG_AES_256:
+ return true;
+ default:
+ return false;
+ }
+}
+
+
+QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg,
+ QCryptoCipherMode mode,
+ const uint8_t *key, size_t nkey,
+ Error **errp)
+{
+ QCryptoCipher *cipher;
+ QCryptoCipherNettle *ctx;
+ uint8_t *rfbkey;
+
+ switch (mode) {
+ case QCRYPTO_CIPHER_MODE_ECB:
+ case QCRYPTO_CIPHER_MODE_CBC:
+ break;
+ default:
+ error_setg(errp, "Unsupported cipher mode %d", mode);
+ return NULL;
+ }
+
+ if (!qcrypto_cipher_validate_key_length(alg, nkey, errp)) {
+ return NULL;
+ }
+
+ cipher = g_new0(QCryptoCipher, 1);
+ cipher->alg = alg;
+ cipher->mode = mode;
+
+ ctx = g_new0(QCryptoCipherNettle, 1);
+
+ switch (alg) {
+ case QCRYPTO_CIPHER_ALG_DES_RFB:
+ ctx->ctx_encrypt = g_new0(struct des_ctx, 1);
+ ctx->ctx_decrypt = NULL; /* 1 ctx can do both */
+ rfbkey = qcrypto_cipher_munge_des_rfb_key(key, nkey);
+ des_set_key(ctx->ctx_encrypt, rfbkey);
+ g_free(rfbkey);
+
+ ctx->alg_encrypt = (nettle_crypt_func *)des_encrypt;
+ ctx->alg_decrypt = (nettle_crypt_func *)des_decrypt;
+
+ ctx->niv = DES_BLOCK_SIZE;
+ break;
+
+ case QCRYPTO_CIPHER_ALG_AES_128:
+ case QCRYPTO_CIPHER_ALG_AES_192:
+ case QCRYPTO_CIPHER_ALG_AES_256:
+ ctx->ctx_encrypt = g_new0(struct aes_ctx, 1);
+ ctx->ctx_decrypt = g_new0(struct aes_ctx, 1);
+
+ aes_set_encrypt_key(ctx->ctx_encrypt, nkey, key);
+ aes_set_decrypt_key(ctx->ctx_decrypt, nkey, key);
+
+ ctx->alg_encrypt = (nettle_crypt_func *)aes_encrypt;
+ ctx->alg_decrypt = (nettle_crypt_func *)aes_decrypt;
+
+ ctx->niv = AES_BLOCK_SIZE;
+ break;
+ default:
+ error_setg(errp, "Unsupported cipher algorithm %d", alg);
+ goto error;
+ }
+
+ ctx->iv = g_new0(uint8_t, ctx->niv);
+ cipher->opaque = ctx;
+
+ return cipher;
+
+ error:
+ g_free(cipher);
+ g_free(ctx);
+ return NULL;
+}
+
+
+void qcrypto_cipher_free(QCryptoCipher *cipher)
+{
+ QCryptoCipherNettle *ctx;
+
+ if (!cipher) {
+ return;
+ }
+
+ ctx = cipher->opaque;
+ g_free(ctx->iv);
+ g_free(ctx->ctx_encrypt);
+ g_free(ctx->ctx_decrypt);
+ g_free(ctx);
+ g_free(cipher);
+}
+
+
+int qcrypto_cipher_encrypt(QCryptoCipher *cipher,
+ const void *in,
+ void *out,
+ size_t len,
+ Error **errp)
+{
+ QCryptoCipherNettle *ctx = cipher->opaque;
+
+ switch (cipher->mode) {
+ case QCRYPTO_CIPHER_MODE_ECB:
+ ctx->alg_encrypt(ctx->ctx_encrypt, len, out, in);
+ break;
+
+ case QCRYPTO_CIPHER_MODE_CBC:
+ cbc_encrypt(ctx->ctx_encrypt, ctx->alg_encrypt,
+ ctx->niv, ctx->iv,
+ len, out, in);
+ break;
+ default:
+ error_setg(errp, "Unsupported cipher algorithm %d",
+ cipher->alg);
+ return -1;
+ }
+ return 0;
+}
+
+
+int qcrypto_cipher_decrypt(QCryptoCipher *cipher,
+ const void *in,
+ void *out,
+ size_t len,
+ Error **errp)
+{
+ QCryptoCipherNettle *ctx = cipher->opaque;
+
+ switch (cipher->mode) {
+ case QCRYPTO_CIPHER_MODE_ECB:
+ ctx->alg_decrypt(ctx->ctx_decrypt ? ctx->ctx_decrypt : ctx->ctx_encrypt,
+ len, out, in);
+ break;
+
+ case QCRYPTO_CIPHER_MODE_CBC:
+ cbc_decrypt(ctx->ctx_decrypt ? ctx->ctx_decrypt : ctx->ctx_encrypt,
+ ctx->alg_decrypt, ctx->niv, ctx->iv,
+ len, out, in);
+ break;
+ default:
+ error_setg(errp, "Unsupported cipher algorithm %d",
+ cipher->alg);
+ return -1;
+ }
+ return 0;
+}
+
+int qcrypto_cipher_setiv(QCryptoCipher *cipher,
+ const uint8_t *iv, size_t niv,
+ Error **errp)
+{
+ QCryptoCipherNettle *ctx = cipher->opaque;
+ if (niv != ctx->niv) {
+ error_setg(errp, "Expected IV size %zu not %zu",
+ ctx->niv, niv);
+ return -1;
+ }
+ memcpy(ctx->iv, iv, niv);
+ return 0;
+}
@@ -22,6 +22,8 @@
#ifdef CONFIG_GNUTLS_GCRYPT
#include "crypto/cipher-gcrypt.c"
+#elif CONFIG_GNUTLS_NETTLE
+#include "crypto/cipher-nettle.c"
#else
#include "crypto/cipher-builtin.c"
#endif
If we are linking to gnutls already and gnutls is built against nettle, then we should use nettle as a cipher backend in preference to our built-in backend. This will be used when linking against some GNUTLS 2.x versions and all GNUTLS 3.x versions. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- configure | 35 ++++++++- crypto/cipher-nettle.c | 206 +++++++++++++++++++++++++++++++++++++++++++++++++ crypto/cipher.c | 2 + 3 files changed, 240 insertions(+), 3 deletions(-) create mode 100644 crypto/cipher-nettle.c