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[Qemu-devel] [PATCH v3 12/18] crypto: introduce some common functions fo
From: |
Longpeng(Mike) |
Subject: |
[Qemu-devel] [PATCH v3 12/18] crypto: introduce some common functions for af_alg backend |
Date: |
Sat, 22 Apr 2017 15:20:21 +0800 |
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) <address@hidden>
---
configure | 21 +++++++++
crypto/Makefile.objs | 1 +
crypto/afalg.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++
crypto/afalgpriv.h | 59 ++++++++++++++++++++++++++
4 files changed, 199 insertions(+)
create mode 100644 crypto/afalg.c
create mode 100644 crypto/afalgpriv.h
diff --git a/configure b/configure
index 6db3044..db0e183 100755
--- a/configure
+++ b/configure
@@ -4744,6 +4744,23 @@ if compile_prog "" "" ; then
have_af_vsock=yes
fi
+##########################################
+# check for usable AF_ALG environment
+hava_af_alg=no
+cat > $TMPC << EOF
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+int main(void) {
+ int sock;
+ sock = socket(AF_ALG, SOCK_SEQPACKET, 0);
+ return sock;
+}
+EOF
+if compile_prog "" "" ; then
+ have_af_alg=yes
+fi
+
#################################################
# Sparc implicitly links with --relax, which is
# incompatible with -r, so --no-relax should be
@@ -5774,6 +5791,10 @@ if test "$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" >> $config_host_mak
fi
diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs
index 1f749f2..2be5a3a 100644
--- a/crypto/Makefile.objs
+++ b/crypto/Makefile.objs
@@ -10,6 +10,7 @@ crypto-obj-$(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
diff --git a/crypto/afalg.c b/crypto/afalg.c
new file mode 100644
index 0000000..80c5cfd
--- /dev/null
+++ b/crypto/afalg.c
@@ -0,0 +1,118 @@
+/*
+ * QEMU Crypto af_alg support
+ *
+ * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Authors:
+ * Longpeng(Mike) <address@hidden>
+ *
+ * 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 (qemu_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 (qemu_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) {
+ if (afalg->msg) {
+ g_free(afalg->msg->msg_control);
+ g_free(afalg->msg);
+ }
+
+ if (afalg->name) {
+ g_free(afalg->name);
+ }
+
+ if (afalg->tfmfd != -1) {
+ closesocket(afalg->tfmfd);
+ }
+
+ if (afalg->opfd != -1) {
+ closesocket(afalg->opfd);
+ }
+
+ g_free(afalg);
+ }
+}
diff --git a/crypto/afalgpriv.h b/crypto/afalgpriv.h
new file mode 100644
index 0000000..f1b0ae5
--- /dev/null
+++ b/crypto/afalgpriv.h
@@ -0,0 +1,59 @@
+/*
+ * QEMU Crypto af_alg support
+ *
+ * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD.
+ *
+ * Authors:
+ * Longpeng(Mike) <address@hidden>
+ *
+ * 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
+
+#ifdef CONFIG_AF_ALG
+
+#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
+
+#endif
--
1.8.3.1
- Re: [Qemu-devel] [PATCH v3 03/18] crypto: cipher: introduce qcrypto_cipher_ctx_new for nettle-backend, (continued)
- [Qemu-devel] [PATCH v3 09/18] crypto: hmac: introduce qcrypto_hmac_ctx_new for nettle-backend, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 05/18] crypto: cipher: add cipher driver framework, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 17/18] tests: crypto: add hash speed benchmark support, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 15/18] crypto: hmac: add af_alg hmac support, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 14/18] crypto: hash: add afalg-backend hash support, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 12/18] crypto: introduce some common functions for af_alg backend,
Longpeng(Mike) <=
- [Qemu-devel] [PATCH v3 13/18] crypto: cipher: add afalg-backend cipher support, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 18/18] tests: crypto: add hmac speed benchmark support, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 06/18] crypto: hash: add hash driver framework, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 10/18] crypto: hmac: introduce qcrypto_hmac_ctx_new for glib-backend, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 16/18] tests: crypto: add cipher speed benchmark support, Longpeng(Mike), 2017/04/22
- [Qemu-devel] [PATCH v3 11/18] crypto: hmac: add hmac driver framework, Longpeng(Mike), 2017/04/22