@@ -4744,6 +4744,24 @@ if compile_prog "" "" ; then
have_af_vsock=yes
fi
+##########################################
+# check for usable AF_ALG environment
+hava_af_alg=no
+cat > $TMPC << EOF
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <linux/if_alg.h>
+int main(void) {
+ int sock;
+ sock = socket(AF_ALG, SOCK_SEQPACKET, 0);
+ return sock;
+}
+EOF
+if compile_prog "" "" ; then
+ have_af_alg=yes
+fi
+
#################################################
# Sparc implicitly links with --relax, which is
# incompatible with -r, so --no-relax should be
@@ -5855,6 +5873,10 @@ if test "$have_af_vsock" = "yes" ; then
echo "CONFIG_AF_VSOCK=y" >> $config_host_mak
fi
+if test "$have_af_alg" = "yes" ; then
+ echo "CONFIG_AF_ALG=y" >> $config_host_mak
+fi
+
if test "$have_sysmacros" = "yes" ; then
echo "CONFIG_SYSMACROS=y" >> $config_host_mak
fi
@@ -10,6 +10,7 @@ crypto-obj-$(if $(CONFIG_NETTLE),n,$(if $(CONFIG_GCRYPT_HMAC),n,y)) += hmac-glib
crypto-obj-y += aes.o
crypto-obj-y += desrfb.o
crypto-obj-y += cipher.o
+crypto-obj-$(CONFIG_AF_ALG) += afalg.o
crypto-obj-y += tlscreds.o
crypto-obj-y += tlscredsanon.o
crypto-obj-y += tlscredsx509.o
new file mode 100644
@@ -0,0 +1,118 @@
+/*
+ * QEMU Crypto af_alg support
+ *
+ * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Authors:
+ * Longpeng(Mike) <longpeng2@huawei.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version. See the COPYING file in the
+ * top-level directory.
+ */
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
+#include "qemu/sockets.h"
+#include "qapi/error.h"
+#include "afalgpriv.h"
+
+static bool
+qcrypto_afalg_build_saddr(const char *type, const char *name,
+ struct sockaddr_alg *salg, Error **errp)
+{
+ salg->salg_family = AF_ALG;
+
+ if (strnlen(type, SALG_TYPE_LEN_MAX) >= SALG_TYPE_LEN_MAX) {
+ error_setg(errp, "Afalg type(%s) is larger than %d bytes",
+ type, SALG_TYPE_LEN_MAX);
+ return false;
+ }
+
+ if (strnlen(name, SALG_NAME_LEN_MAX) >= SALG_NAME_LEN_MAX) {
+ error_setg(errp, "Afalg name(%s) is larger than %d bytes",
+ name, SALG_NAME_LEN_MAX);
+ return false;
+ }
+
+ pstrcpy((char *)salg->salg_type, SALG_TYPE_LEN_MAX, type);
+ pstrcpy((char *)salg->salg_name, SALG_NAME_LEN_MAX, name);
+
+ return true;
+}
+
+static int
+qcrypto_afalg_socket_bind(const char *type, const char *name,
+ Error **errp)
+{
+ int sbind;
+ struct sockaddr_alg salg = {0};
+
+ if (!qcrypto_afalg_build_saddr(type, name, &salg, errp)) {
+ return -1;
+ }
+
+ sbind = qemu_socket(AF_ALG, SOCK_SEQPACKET, 0);
+ if (sbind < 0) {
+ error_setg_errno(errp, errno, "Failed to create socket");
+ return -1;
+ }
+
+ if (bind(sbind, (const struct sockaddr *)&salg, sizeof(salg)) != 0) {
+ error_setg_errno(errp, errno, "Failed to bind socket");
+ closesocket(sbind);
+ return -1;
+ }
+
+ return sbind;
+}
+
+QCryptoAFAlg *
+qcrypto_afalg_comm_alloc(const char *type, const char *name,
+ Error **errp)
+{
+ QCryptoAFAlg *afalg;
+
+ afalg = g_new0(QCryptoAFAlg, 1);
+ /* initilize crypto API socket */
+ afalg->opfd = -1;
+ afalg->tfmfd = qcrypto_afalg_socket_bind(type, name, errp);
+ if (afalg->tfmfd == -1) {
+ goto error;
+ }
+
+ afalg->opfd = qemu_accept(afalg->tfmfd, NULL, 0);
+ if (afalg->opfd == -1) {
+ error_setg_errno(errp, errno, "Failed to accept socket");
+ goto error;
+ }
+
+ return afalg;
+
+error:
+ qcrypto_afalg_comm_free(afalg);
+ return NULL;
+}
+
+void qcrypto_afalg_comm_free(QCryptoAFAlg *afalg)
+{
+ if (!afalg) {
+ return;
+ }
+
+ if (afalg->msg) {
+ g_free(afalg->msg->msg_control);
+ g_free(afalg->msg);
+ }
+
+ g_free(afalg->name);
+
+ if (afalg->tfmfd != -1) {
+ closesocket(afalg->tfmfd);
+ }
+
+ if (afalg->opfd != -1) {
+ closesocket(afalg->opfd);
+ }
+
+ g_free(afalg);
+}
new file mode 100644
@@ -0,0 +1,55 @@
+/*
+ * QEMU Crypto af_alg support
+ *
+ * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Authors:
+ * Longpeng(Mike) <longpeng2@huawei.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version. See the COPYING file in the
+ * top-level directory.
+ */
+
+#ifndef QCRYPTO_AFALGPRIV_H
+#define QCRYPTO_AFALGPRIV_H
+
+#include <linux/if_alg.h>
+
+#define SALG_TYPE_LEN_MAX 14
+#define SALG_NAME_LEN_MAX 64
+
+typedef struct QCryptoAFAlg QCryptoAFAlg;
+
+struct QCryptoAFAlg {
+ int tfmfd;
+ int opfd;
+ char *name;
+ struct msghdr *msg;
+ struct cmsghdr *cmsg;
+};
+
+/**
+ * qcrypto_afalg_comm_alloc:
+ * @type: the type of crypto operation
+ * @name: the name of crypto operation
+ *
+ * Allocate a QCryptoAFAlg object and bind itself to
+ * a AF_ALG socket.
+ *
+ * Returns:
+ * a new QCryptoAFAlg object, or NULL in error.
+ */
+QCryptoAFAlg *
+qcrypto_afalg_comm_alloc(const char *type, const char *name,
+ Error **errp);
+
+/**
+ * afalg_comm_free:
+ * @afalg: the QCryptoAFAlg object
+ *
+ * Free the @afalg.
+ */
+void qcrypto_afalg_comm_free(QCryptoAFAlg *afalg);
+
+#endif
The AF_ALG socket family is the userspace interface for linux crypto API, this patch adds af_alg family support and some common functions for af_alg backend. It'll be used by afalg-backend crypto latter. Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com> --- configure | 22 ++++++++++ crypto/Makefile.objs | 1 + crypto/afalg.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++ crypto/afalgpriv.h | 55 ++++++++++++++++++++++++ 4 files changed, 196 insertions(+) create mode 100644 crypto/afalg.c create mode 100644 crypto/afalgpriv.h