From patchwork Tue Jul 4 08:57:05 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Longpeng (Mike, Cloud Infrastructure Service Product Dept.)" X-Patchwork-Id: 783810 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3x1ynM5MJ6z9s7B for ; Tue, 4 Jul 2017 19:07:19 +1000 (AEST) Received: from localhost ([::1]:39615 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dSJnh-0005Yz-Bn for incoming@patchwork.ozlabs.org; Tue, 04 Jul 2017 05:07:17 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46958) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dSJef-0005Db-Dx for qemu-devel@nongnu.org; Tue, 04 Jul 2017 04:57:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dSJed-0005fu-SA for qemu-devel@nongnu.org; Tue, 04 Jul 2017 04:57:57 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:4016) by eggs.gnu.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.71) (envelope-from ) id 1dSJed-0005dG-1e for qemu-devel@nongnu.org; Tue, 04 Jul 2017 04:57:55 -0400 Received: from 172.30.72.55 (EHLO DGGEML402-HUB.china.huawei.com) ([172.30.72.55]) by dggrg01-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id ARL27717; Tue, 04 Jul 2017 16:57:51 +0800 (CST) Received: from localhost (10.177.246.209) by DGGEML402-HUB.china.huawei.com (10.3.17.38) with Microsoft SMTP Server id 14.3.301.0; Tue, 4 Jul 2017 16:57:41 +0800 From: "Longpeng(Mike)" To: Date: Tue, 4 Jul 2017 16:57:05 +0800 Message-ID: <1499158630-75260-14-git-send-email-longpeng2@huawei.com> X-Mailer: git-send-email 1.8.4.msysgit.0 In-Reply-To: <1499158630-75260-1-git-send-email-longpeng2@huawei.com> References: <1499158630-75260-1-git-send-email-longpeng2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.246.209] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090202.595B5890.0192, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 4be6a5536dbbf7fe2a3b5b59acab46df X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.4.x-2.6.x [generic] [fuzzy] X-Received-From: 45.249.212.187 Subject: [Qemu-devel] [PATCH v4 13/18] crypto: cipher: add afalg-backend cipher support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: weidong.huang@huawei.com, wangxinxin.wang@huawei.com, qemu-devel@nongnu.org, arei.gonglei@huawei.com, longpeng.mike@gmail.com, "Longpeng\(Mike\)" Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Adds afalg-backend cipher support: introduces some private APIs firstly, and then intergrates them into qcrypto_cipher_afalg_driver. Signed-off-by: Longpeng(Mike) --- crypto/Makefile.objs | 1 + crypto/afalgpriv.h | 9 ++ crypto/cipher-afalg.c | 223 ++++++++++++++++++++++++++++++++++++++++++++++++++ crypto/cipher.c | 23 +++++- crypto/cipherpriv.h | 16 ++++ 5 files changed, 268 insertions(+), 4 deletions(-) create mode 100644 crypto/cipher-afalg.c diff --git a/crypto/Makefile.objs b/crypto/Makefile.objs index 2be5a3a..d2e8fa8 100644 --- a/crypto/Makefile.objs +++ b/crypto/Makefile.objs @@ -11,6 +11,7 @@ crypto-obj-y += aes.o crypto-obj-y += desrfb.o crypto-obj-y += cipher.o crypto-obj-$(CONFIG_AF_ALG) += afalg.o +crypto-obj-$(CONFIG_AF_ALG) += cipher-afalg.o crypto-obj-y += tlscreds.o crypto-obj-y += tlscredsanon.o crypto-obj-y += tlscredsx509.o diff --git a/crypto/afalgpriv.h b/crypto/afalgpriv.h index d21160c..a4a7b97 100644 --- a/crypto/afalgpriv.h +++ b/crypto/afalgpriv.h @@ -19,6 +19,15 @@ #define SALG_TYPE_LEN_MAX 14 #define SALG_NAME_LEN_MAX 64 +#ifndef SOL_ALG +#define SOL_ALG 279 +#endif + +#define AFALG_TYPE_CIPHER "skcipher" + +#define ALG_OPTYPE_LEN 4 +#define ALG_MSGIV_LEN(len) (sizeof(struct af_alg_iv) + (len)) + typedef struct QCryptoAFAlg QCryptoAFAlg; struct QCryptoAFAlg { diff --git a/crypto/cipher-afalg.c b/crypto/cipher-afalg.c new file mode 100644 index 0000000..c5d1d5d --- /dev/null +++ b/crypto/cipher-afalg.c @@ -0,0 +1,223 @@ +/* + * QEMU Crypto af_alg-backend cipher support + * + * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD. + * + * Authors: + * Longpeng(Mike) + * + * 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/sockets.h" +#include "qemu-common.h" +#include "qapi/error.h" +#include "crypto/cipher.h" +#include "cipherpriv.h" + + +static char * +qcrypto_afalg_cipher_format_name(QCryptoCipherAlgorithm alg, + QCryptoCipherMode mode, + Error **errp) +{ + char *name; + const char *alg_name; + const char *mode_name; + + switch (alg) { + case QCRYPTO_CIPHER_ALG_AES_128: + case QCRYPTO_CIPHER_ALG_AES_192: + case QCRYPTO_CIPHER_ALG_AES_256: + alg_name = "aes"; + break; + case QCRYPTO_CIPHER_ALG_CAST5_128: + alg_name = "cast5"; + break; + case QCRYPTO_CIPHER_ALG_SERPENT_128: + case QCRYPTO_CIPHER_ALG_SERPENT_192: + case QCRYPTO_CIPHER_ALG_SERPENT_256: + alg_name = "serpent"; + break; + case QCRYPTO_CIPHER_ALG_TWOFISH_128: + case QCRYPTO_CIPHER_ALG_TWOFISH_192: + case QCRYPTO_CIPHER_ALG_TWOFISH_256: + alg_name = "twofish"; + break; + + default: + error_setg(errp, "Unsupported cipher algorithm %d", alg); + return NULL; + } + + mode_name = QCryptoCipherMode_lookup[mode]; + name = g_strdup_printf("%s(%s)", mode_name, alg_name); + + return name; +} + +QCryptoAFAlg * +qcrypto_afalg_cipher_ctx_new(QCryptoCipherAlgorithm alg, + QCryptoCipherMode mode, + const uint8_t *key, + size_t nkey, Error **errp) +{ + QCryptoAFAlg *afalg; + size_t expect_niv; + char *name; + + name = qcrypto_afalg_cipher_format_name(alg, mode, errp); + if (!name) { + return NULL; + } + + afalg = qcrypto_afalg_comm_alloc(AFALG_TYPE_CIPHER, name, errp); + if (!afalg) { + g_free(name); + return NULL; + } + afalg->name = name; + + /* setkey */ + if (qemu_setsockopt(afalg->tfmfd, SOL_ALG, ALG_SET_KEY, key, + nkey) != 0) { + error_setg_errno(errp, errno, "Set key failed"); + qcrypto_afalg_comm_free(afalg); + return NULL; + } + + /* prepare msg header */ + afalg->msg = g_new0(struct msghdr, 1); + afalg->msg->msg_controllen += CMSG_SPACE(ALG_OPTYPE_LEN); + expect_niv = qcrypto_cipher_get_iv_len(alg, mode); + if (expect_niv) { + afalg->msg->msg_controllen += CMSG_SPACE(ALG_MSGIV_LEN(expect_niv)); + } + afalg->msg->msg_control = g_new0(uint8_t, afalg->msg->msg_controllen); + + /* We use 1st msghdr for crypto-info and 2nd msghdr for IV-info */ + afalg->cmsg = CMSG_FIRSTHDR(afalg->msg); + afalg->cmsg->cmsg_type = ALG_SET_OP; + afalg->cmsg->cmsg_len = CMSG_SPACE(ALG_OPTYPE_LEN); + if (expect_niv) { + afalg->cmsg = CMSG_NXTHDR(afalg->msg, afalg->cmsg); + afalg->cmsg->cmsg_type = ALG_SET_IV; + afalg->cmsg->cmsg_len = CMSG_SPACE(ALG_MSGIV_LEN(expect_niv)); + } + afalg->cmsg = CMSG_FIRSTHDR(afalg->msg); + + return afalg; +} + +static int +qcrypto_afalg_cipher_setiv(QCryptoCipher *cipher, + const uint8_t *iv, + size_t niv, Error **errp) +{ + struct af_alg_iv *alg_iv; + size_t expect_niv; + QCryptoAFAlg *afalg = cipher->opaque; + + expect_niv = qcrypto_cipher_get_iv_len(cipher->alg, cipher->mode); + if (niv != expect_niv) { + error_setg(errp, "Set IV len(%zu) not match expected(%zu)", + niv, expect_niv); + return -1; + } + + /* move ->cmsg to next msghdr, for IV-info */ + afalg->cmsg = CMSG_NXTHDR(afalg->msg, afalg->cmsg); + + /* build setiv msg */ + afalg->cmsg->cmsg_level = SOL_ALG; + alg_iv = (struct af_alg_iv *)CMSG_DATA(afalg->cmsg); + alg_iv->ivlen = niv; + memcpy(alg_iv->iv, iv, niv); + + return 0; +} + +static int +qcrypto_afalg_cipher_op(QCryptoAFAlg *afalg, + const void *in, void *out, + size_t len, bool do_encrypt, + Error **errp) +{ + uint32_t *type = NULL; + struct iovec iov; + size_t ret, done = 0; + uint32_t origin_controllen; + + origin_controllen = afalg->msg->msg_controllen; + /* movev ->cmsg to first header, for crypto-info */ + afalg->cmsg = CMSG_FIRSTHDR(afalg->msg); + + /* build encrypt msg */ + afalg->cmsg->cmsg_level = SOL_ALG; + afalg->msg->msg_iov = &iov; + afalg->msg->msg_iovlen = 1; + type = (uint32_t *)CMSG_DATA(afalg->cmsg); + if (do_encrypt) { + *type = ALG_OP_ENCRYPT; + } else { + *type = ALG_OP_DECRYPT; + } + + do { + iov.iov_base = (void *)in + done; + iov.iov_len = len - done; + + /* send info to AF_ALG core */ + ret = sendmsg(afalg->opfd, afalg->msg, 0); + if (ret == -1) { + error_setg_errno(errp, errno, "Send data to AF_ALG core failed"); + return -1; + } + + /* encrypto && get result */ + if (ret != read(afalg->opfd, out, ret)) { + error_setg_errno(errp, errno, "Get result from AF_ALG core failed"); + return -1; + } + + /* do not update IV for following chunks */ + afalg->msg->msg_controllen = 0; + done += ret; + } while (done < len); + + afalg->msg->msg_controllen = origin_controllen; + + return 0; +} + +static int +qcrypto_afalg_cipher_encrypt(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) +{ + return qcrypto_afalg_cipher_op(cipher->opaque, in, out, + len, true, errp); +} + +static int +qcrypto_afalg_cipher_decrypt(QCryptoCipher *cipher, + const void *in, void *out, + size_t len, Error **errp) +{ + return qcrypto_afalg_cipher_op(cipher->opaque, in, out, + len, false, errp); +} + +static void qcrypto_afalg_comm_ctx_free(QCryptoCipher *cipher) +{ + qcrypto_afalg_comm_free(cipher->opaque); +} + +struct QCryptoCipherDriver qcrypto_cipher_afalg_driver = { + .cipher_encrypt = qcrypto_afalg_cipher_encrypt, + .cipher_decrypt = qcrypto_afalg_cipher_decrypt, + .cipher_setiv = qcrypto_afalg_cipher_setiv, + .cipher_free = qcrypto_afalg_comm_ctx_free, +}; diff --git a/crypto/cipher.c b/crypto/cipher.c index 0a3d2e5..a487270 100644 --- a/crypto/cipher.c +++ b/crypto/cipher.c @@ -163,18 +163,33 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg, Error **errp) { QCryptoCipher *cipher; - void *ctx; + void *ctx = NULL; + Error *err2 = NULL; + QCryptoCipherDriver *drv; + +#ifdef CONFIG_AF_ALG + ctx = qcrypto_afalg_cipher_ctx_new(alg, mode, key, nkey, &err2); + if (ctx) { + drv = &qcrypto_cipher_afalg_driver; + } +#endif - ctx = qcrypto_cipher_ctx_new(alg, mode, key, nkey, errp); if (!ctx) { - return NULL; + ctx = qcrypto_cipher_ctx_new(alg, mode, key, nkey, errp); + if (!ctx) { + error_free(err2); + return NULL; + } + + drv = &qcrypto_cipher_lib_driver; + error_free(err2); } cipher = g_new0(QCryptoCipher, 1); cipher->alg = alg; cipher->mode = mode; cipher->opaque = ctx; - cipher->driver = (void *)&qcrypto_cipher_lib_driver; + cipher->driver = (void *)drv; return cipher; } diff --git a/crypto/cipherpriv.h b/crypto/cipherpriv.h index 4af5e85..77da4c2 100644 --- a/crypto/cipherpriv.h +++ b/crypto/cipherpriv.h @@ -15,6 +15,8 @@ #ifndef QCRYPTO_CIPHERPRIV_H #define QCRYPTO_CIPHERPRIV_H +#include "qapi-types.h" + typedef struct QCryptoCipherDriver QCryptoCipherDriver; struct QCryptoCipherDriver { @@ -37,4 +39,18 @@ struct QCryptoCipherDriver { void (*cipher_free)(QCryptoCipher *cipher); }; +#ifdef CONFIG_AF_ALG + +#include "afalgpriv.h" + +extern QCryptoAFAlg * +qcrypto_afalg_cipher_ctx_new(QCryptoCipherAlgorithm alg, + QCryptoCipherMode mode, + const uint8_t *key, + size_t nkey, Error **errp); + +extern struct QCryptoCipherDriver qcrypto_cipher_afalg_driver; + +#endif + #endif