From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48219) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d1pMA-0003f9-EY for qemu-devel@nongnu.org; Sat, 22 Apr 2017 03:21:24 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d1pM7-0003pV-Jy for qemu-devel@nongnu.org; Sat, 22 Apr 2017 03:21:22 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:3459 helo=dggrg02-dlp.huawei.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_ARCFOUR_SHA1:16) (Exim 4.71) (envelope-from ) id 1d1pM6-0003ns-Gr for qemu-devel@nongnu.org; Sat, 22 Apr 2017 03:21:19 -0400 From: "Longpeng(Mike)" Date: Sat, 22 Apr 2017 15:20:22 +0800 Message-ID: <1492845627-4384-14-git-send-email-longpeng2@huawei.com> In-Reply-To: <1492845627-4384-1-git-send-email-longpeng2@huawei.com> References: <1492845627-4384-1-git-send-email-longpeng2@huawei.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v3 13/18] crypto: cipher: add afalg-backend cipher support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: berrange@redhat.com Cc: arei.gonglei@huawei.com, longpeng.mike@gmail.com, qemu-devel@nongnu.org, weidong.huang@huawei.com, "Longpeng(Mike)" 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 | 229 +++++++++++++++++++++++++++++++++++++++++++++ crypto/cipher.c | 28 +++++- crypto/cipherpriv.h | 11 +++ include/crypto/cipher.h | 8 ++ tests/test-crypto-cipher.c | 10 +- 7 files changed, 294 insertions(+), 2 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 f1b0ae5..e384b15 100644 --- a/crypto/afalgpriv.h +++ b/crypto/afalgpriv.h @@ -21,6 +21,15 @@ #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..cce8e6b --- /dev/null +++ b/crypto/cipher-afalg.c @@ -0,0 +1,229 @@ +/* + * 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; + int ret; + + 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_new0(char, SALG_NAME_LEN_MAX); + ret = snprintf(name, SALG_NAME_LEN_MAX, "%s(%s)", mode_name, + alg_name); + if (ret < 0 || ret >= SALG_NAME_LEN_MAX) { + error_setg(errp, "Build ciphername(name='%s',mode='%s') failed", + alg_name, mode_name); + g_free(name); + return NULL; + } + + 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 except_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); + except_niv = qcrypto_cipher_get_iv_len(alg, mode); + if (except_niv) { + afalg->msg->msg_controllen += CMSG_SPACE(ALG_MSGIV_LEN(except_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_level = SOL_ALG; + afalg->cmsg->cmsg_type = ALG_SET_OP; + afalg->cmsg->cmsg_len = CMSG_SPACE(ALG_OPTYPE_LEN); + + 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 except_niv; + QCryptoAFAlg *afalg = cipher->opaque; + + except_niv = qcrypto_cipher_get_iv_len(cipher->alg, cipher->mode); + if (niv != except_niv) { + error_setg(errp, "Set IV len(%lu) not match excepted(%lu)", + niv, except_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; + afalg->cmsg->cmsg_type = ALG_SET_IV; + afalg->cmsg->cmsg_len = CMSG_SPACE(ALG_MSGIV_LEN(niv)); + 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_contorllen; + + origin_contorllen = afalg->msg->msg_controllen; + /* movev ->cmsg to first header, for crypto-info */ + afalg->cmsg = CMSG_FIRSTHDR(afalg->msg); + + /* build encrypt msg */ + 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_contorllen; + + 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 a6e052c..4a6f548 100644 --- a/crypto/cipher.c +++ b/crypto/cipher.c @@ -164,17 +164,34 @@ QCryptoCipher *qcrypto_cipher_new(QCryptoCipherAlgorithm alg, { QCryptoCipher *cipher; void *ctx; + 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; + goto set_cipher; + } +#endif ctx = qcrypto_cipher_ctx_new(alg, mode, key, nkey, errp); if (ctx == NULL) { + error_free(err2); return NULL; } + drv = &qcrypto_cipher_lib_driver; + error_free(err2); + +#ifdef CONFIG_AF_ALG +set_cipher: +#endif 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; } @@ -220,3 +237,12 @@ void qcrypto_cipher_free(QCryptoCipher *cipher) g_free(cipher); } } + +bool qcrypto_cipher_using_afalg_drv(QCryptoCipher *cipher) +{ +#ifdef CONFIG_AF_ALG + return cipher->driver == (void *)&qcrypto_cipher_afalg_driver; +#else + return false; +#endif +} diff --git a/crypto/cipherpriv.h b/crypto/cipherpriv.h index 4af5e85..91c6a7e 100644 --- a/crypto/cipherpriv.h +++ b/crypto/cipherpriv.h @@ -15,6 +15,9 @@ #ifndef QCRYPTO_CIPHERPRIV_H #define QCRYPTO_CIPHERPRIV_H +#include "qapi-types.h" +#include "afalgpriv.h" + typedef struct QCryptoCipherDriver QCryptoCipherDriver; struct QCryptoCipherDriver { @@ -37,4 +40,12 @@ struct QCryptoCipherDriver { void (*cipher_free)(QCryptoCipher *cipher); }; +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 diff --git a/include/crypto/cipher.h b/include/crypto/cipher.h index 984fb82..037f602 100644 --- a/include/crypto/cipher.h +++ b/include/crypto/cipher.h @@ -233,4 +233,12 @@ int qcrypto_cipher_setiv(QCryptoCipher *cipher, const uint8_t *iv, size_t niv, Error **errp); +/** + * qcrypto_cipher_using_afalg_drv: + * @ the cipher object + * + * Returns: true if @cipher is using afalg driver, otherwise false. + */ +bool qcrypto_cipher_using_afalg_drv(QCryptoCipher *cipher); + #endif /* QCRYPTO_CIPHER_H */ diff --git a/tests/test-crypto-cipher.c b/tests/test-crypto-cipher.c index 07fa2fa..8bb3308 100644 --- a/tests/test-crypto-cipher.c +++ b/tests/test-crypto-cipher.c @@ -715,6 +715,7 @@ static void test_cipher_null_iv(void) uint8_t key[32] = { 0 }; uint8_t plaintext[32] = { 0 }; uint8_t ciphertext[32] = { 0 }; + Error *err = NULL; cipher = qcrypto_cipher_new( QCRYPTO_CIPHER_ALG_AES_256, @@ -729,7 +730,14 @@ static void test_cipher_null_iv(void) plaintext, ciphertext, sizeof(plaintext), - &error_abort); + &err); + + if (qcrypto_cipher_using_afalg_drv(cipher)) { + g_assert(err != NULL); + error_free_or_abort(&err); + } else { + g_assert(err == NULL); + } qcrypto_cipher_free(cipher); } -- 1.8.3.1