[mirror_qemu.git] / backends / cryptodev-builtin.c

/*
 * QEMU Cryptodev backend for QEMU cipher APIs
 *
 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
 *
 * Authors:
 *    Gonglei <arei.gonglei@huawei.com>
 *
 * 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 "qemu/osdep.h"
#include "sysemu/cryptodev.h"
#include "hw/boards.h"
#include "qapi/error.h"
#include "standard-headers/linux/virtio_crypto.h"
#include "crypto/cipher.h"


/**
 * @TYPE_CRYPTODEV_BACKEND_BUILTIN:
 * name of backend that uses QEMU cipher API
 */
#define TYPE_CRYPTODEV_BACKEND_BUILTIN "cryptodev-backend-builtin"

#define CRYPTODEV_BACKEND_BUILTIN(obj) \
    OBJECT_CHECK(CryptoDevBackendBuiltin, \
                 (obj), TYPE_CRYPTODEV_BACKEND_BUILTIN)

typedef struct CryptoDevBackendBuiltin
                         CryptoDevBackendBuiltin;

typedef struct CryptoDevBackendBuiltinSession {
    QCryptoCipher *cipher;
    uint8_t direction; /* encryption or decryption */
    uint8_t type; /* cipher? hash? aead? */
    QTAILQ_ENTRY(CryptoDevBackendBuiltinSession) next;
} CryptoDevBackendBuiltinSession;

/* Max number of symmetric sessions */
#define MAX_NUM_SESSIONS 256

#define CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN    512
#define CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN  64

struct CryptoDevBackendBuiltin {
    CryptoDevBackend parent_obj;

    CryptoDevBackendBuiltinSession *sessions[MAX_NUM_SESSIONS];
};

static void cryptodev_builtin_init(
             CryptoDevBackend *backend, Error **errp)
{
    /* Only support one queue */
    int queues = backend->conf.peers.queues;
    CryptoDevBackendClient *cc;

    if (queues != 1) {
        error_setg(errp,
                  "Only support one queue in cryptdov-builtin backend");
        return;
    }

    cc = cryptodev_backend_new_client(
              "cryptodev-builtin", NULL);
    cc->info_str = g_strdup_printf("cryptodev-builtin0");
    cc->queue_index = 0;
    backend->conf.peers.ccs[0] = cc;

    backend->conf.crypto_services =
                         1u << VIRTIO_CRYPTO_SERVICE_CIPHER |
                         1u << VIRTIO_CRYPTO_SERVICE_HASH |
                         1u << VIRTIO_CRYPTO_SERVICE_MAC;
    backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
    backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
    /*
     * Set the Maximum length of crypto request.
     * Why this value? Just avoid to overflow when
     * memory allocation for each crypto request.
     */
    backend->conf.max_size = LONG_MAX - sizeof(CryptoDevBackendSymOpInfo);
    backend->conf.max_cipher_key_len = CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN;
    backend->conf.max_auth_key_len = CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN;
}

static int
cryptodev_builtin_get_unused_session_index(
                 CryptoDevBackendBuiltin *builtin)
{
    size_t i;

    for (i = 0; i < MAX_NUM_SESSIONS; i++) {
        if (builtin->sessions[i] == NULL) {
            return i;
        }
    }

    return -1;
}

#define AES_KEYSIZE_128 16
#define AES_KEYSIZE_192 24
#define AES_KEYSIZE_256 32
#define AES_KEYSIZE_128_XTS AES_KEYSIZE_256
#define AES_KEYSIZE_256_XTS 64

static int
cryptodev_builtin_get_aes_algo(uint32_t key_len, int mode, Error **errp)
{
    int algo;

    if (key_len == AES_KEYSIZE_128) {
        algo = QCRYPTO_CIPHER_ALG_AES_128;
    } else if (key_len == AES_KEYSIZE_192) {
        algo = QCRYPTO_CIPHER_ALG_AES_192;
    } else if (key_len == AES_KEYSIZE_256) { /* equals AES_KEYSIZE_128_XTS */
        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
            algo = QCRYPTO_CIPHER_ALG_AES_128;
        } else {
            algo = QCRYPTO_CIPHER_ALG_AES_256;
        }
    } else if (key_len == AES_KEYSIZE_256_XTS) {
        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
            algo = QCRYPTO_CIPHER_ALG_AES_256;
        } else {
            goto err;
        }
    } else {
        goto err;
    }

    return algo;

err:
   error_setg(errp, "Unsupported key length :%u", key_len);
   return -1;
}

static int cryptodev_builtin_create_cipher_session(
                    CryptoDevBackendBuiltin *builtin,
                    CryptoDevBackendSymSessionInfo *sess_info,
                    Error **errp)
{
    int algo;
    int mode;
    QCryptoCipher *cipher;
    int index;
    CryptoDevBackendBuiltinSession *sess;

    if (sess_info->op_type != VIRTIO_CRYPTO_SYM_OP_CIPHER) {
        error_setg(errp, "Unsupported optype :%u", sess_info->op_type);
        return -1;
    }

    index = cryptodev_builtin_get_unused_session_index(builtin);
    if (index < 0) {
        error_setg(errp, "Total number of sessions created exceeds %u",
                  MAX_NUM_SESSIONS);
        return -1;
    }

    switch (sess_info->cipher_alg) {
    case VIRTIO_CRYPTO_CIPHER_AES_ECB:
        mode = QCRYPTO_CIPHER_MODE_ECB;
        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
                                                    mode, errp);
        if (algo < 0)  {
            return -1;
        }
        break;
    case VIRTIO_CRYPTO_CIPHER_AES_CBC:
        mode = QCRYPTO_CIPHER_MODE_CBC;
        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
                                                    mode, errp);
        if (algo < 0)  {
            return -1;
        }
        break;
    case VIRTIO_CRYPTO_CIPHER_AES_CTR:
        mode = QCRYPTO_CIPHER_MODE_CTR;
        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
                                                    mode, errp);
        if (algo < 0)  {
            return -1;
        }
        break;
    case VIRTIO_CRYPTO_CIPHER_AES_XTS:
        mode = QCRYPTO_CIPHER_MODE_XTS;
        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
                                                    mode, errp);
        if (algo < 0)  {
            return -1;
        }
        break;
    default:
        error_setg(errp, "Unsupported cipher alg :%u",
                   sess_info->cipher_alg);
        return -1;
    }

    cipher = qcrypto_cipher_new(algo, mode,
                               sess_info->cipher_key,
                               sess_info->key_len,
                               errp);
    if (!cipher) {
        return -1;
    }

    sess = g_new0(CryptoDevBackendBuiltinSession, 1);
    sess->cipher = cipher;
    sess->direction = sess_info->direction;
    sess->type = sess_info->op_type;

    builtin->sessions[index] = sess;

    return index;
}

static int64_t cryptodev_builtin_sym_create_session(
           CryptoDevBackend *backend,
           CryptoDevBackendSymSessionInfo *sess_info,
           uint32_t queue_index, Error **errp)
{
    CryptoDevBackendBuiltin *builtin =
                      CRYPTODEV_BACKEND_BUILTIN(backend);
    int64_t session_id = -1;
    int ret;

    switch (sess_info->op_code) {
    case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
        ret = cryptodev_builtin_create_cipher_session(
                           builtin, sess_info, errp);
        if (ret < 0) {
            return ret;
        } else {
            session_id = ret;
        }
        break;
    case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
    case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
    default:
        error_setg(errp, "Unsupported opcode :%" PRIu32 "",
                   sess_info->op_code);
        return -1;
    }

    return session_id;
}

static int cryptodev_builtin_sym_close_session(
           CryptoDevBackend *backend,
           uint64_t session_id,
           uint32_t queue_index, Error **errp)
{
    CryptoDevBackendBuiltin *builtin =
                      CRYPTODEV_BACKEND_BUILTIN(backend);

    if (session_id >= MAX_NUM_SESSIONS ||
              builtin->sessions[session_id] == NULL) {
        error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
                      session_id);
        return -1;
    }

    qcrypto_cipher_free(builtin->sessions[session_id]->cipher);
    g_free(builtin->sessions[session_id]);
    builtin->sessions[session_id] = NULL;
    return 0;
}

static int cryptodev_builtin_sym_operation(
                 CryptoDevBackend *backend,
                 CryptoDevBackendSymOpInfo *op_info,
                 uint32_t queue_index, Error **errp)
{
    CryptoDevBackendBuiltin *builtin =
                      CRYPTODEV_BACKEND_BUILTIN(backend);
    CryptoDevBackendBuiltinSession *sess;
    int ret;

    if (op_info->session_id >= MAX_NUM_SESSIONS ||
              builtin->sessions[op_info->session_id] == NULL) {
        error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
                   op_info->session_id);
        return -VIRTIO_CRYPTO_INVSESS;
    }

    if (op_info->op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
        error_setg(errp,
               "Algorithm chain is unsupported for cryptdoev-builtin");
        return -VIRTIO_CRYPTO_NOTSUPP;
    }

    sess = builtin->sessions[op_info->session_id];

    ret = qcrypto_cipher_setiv(sess->cipher, op_info->iv,
                               op_info->iv_len, errp);
    if (ret < 0) {
        return -VIRTIO_CRYPTO_ERR;
    }

    if (sess->direction == VIRTIO_CRYPTO_OP_ENCRYPT) {
        ret = qcrypto_cipher_encrypt(sess->cipher, op_info->src,
                                     op_info->dst, op_info->src_len, errp);
        if (ret < 0) {
            return -VIRTIO_CRYPTO_ERR;
        }
    } else {
        ret = qcrypto_cipher_decrypt(sess->cipher, op_info->src,
                                     op_info->dst, op_info->src_len, errp);
        if (ret < 0) {
            return -VIRTIO_CRYPTO_ERR;
        }
    }
    return VIRTIO_CRYPTO_OK;
}

static void cryptodev_builtin_cleanup(
             CryptoDevBackend *backend,
             Error **errp)
{
    CryptoDevBackendBuiltin *builtin =
                      CRYPTODEV_BACKEND_BUILTIN(backend);
    size_t i;
    int queues = backend->conf.peers.queues;
    CryptoDevBackendClient *cc;

    for (i = 0; i < MAX_NUM_SESSIONS; i++) {
        if (builtin->sessions[i] != NULL) {
            cryptodev_builtin_sym_close_session(
                    backend, i, 0, errp);
        }
    }

    assert(queues == 1);

    for (i = 0; i < queues; i++) {
        cc = backend->conf.peers.ccs[i];
        if (cc) {
            cryptodev_backend_free_client(cc);
            backend->conf.peers.ccs[i] = NULL;
        }
    }
}

static void
cryptodev_builtin_class_init(ObjectClass *oc, void *data)
{
    CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);

    bc->init = cryptodev_builtin_init;
    bc->cleanup = cryptodev_builtin_cleanup;
    bc->create_session = cryptodev_builtin_sym_create_session;
    bc->close_session = cryptodev_builtin_sym_close_session;
    bc->do_sym_op = cryptodev_builtin_sym_operation;
}

static const TypeInfo cryptodev_builtin_info = {
    .name = TYPE_CRYPTODEV_BACKEND_BUILTIN,
    .parent = TYPE_CRYPTODEV_BACKEND,
    .class_init = cryptodev_builtin_class_init,
    .instance_size = sizeof(CryptoDevBackendBuiltin),
};

static void
cryptodev_builtin_register_types(void)
{
    type_register_static(&cryptodev_builtin_info);
}

type_init(cryptodev_builtin_register_types);
Commit	Line	Data
1653a5f3 GA	1	/*
	2	* QEMU Cryptodev backend for QEMU cipher APIs
	3	*
	4	* Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
	5	*
	6	* Authors:
	7	* Gonglei <arei.gonglei@huawei.com>
	8	*
	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; either
	12	* version 2 of the License, or (at your option) any later version.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	21	*
	22	*/
	23
	24	#include "qemu/osdep.h"
	25	#include "sysemu/cryptodev.h"
	26	#include "hw/boards.h"
	27	#include "qapi/error.h"
	28	#include "standard-headers/linux/virtio_crypto.h"
	29	#include "crypto/cipher.h"
	30
	31
	32	/**
	33	* @TYPE_CRYPTODEV_BACKEND_BUILTIN:
	34	* name of backend that uses QEMU cipher API
	35	*/
	36	#define TYPE_CRYPTODEV_BACKEND_BUILTIN "cryptodev-backend-builtin"
	37
	38	#define CRYPTODEV_BACKEND_BUILTIN(obj) \
	39	OBJECT_CHECK(CryptoDevBackendBuiltin, \
	40	(obj), TYPE_CRYPTODEV_BACKEND_BUILTIN)
	41
	42	typedef struct CryptoDevBackendBuiltin
	43	CryptoDevBackendBuiltin;
	44
	45	typedef struct CryptoDevBackendBuiltinSession {
	46	QCryptoCipher *cipher;
	47	uint8_t direction; /* encryption or decryption */
	48	uint8_t type; /* cipher? hash? aead? */
	49	QTAILQ_ENTRY(CryptoDevBackendBuiltinSession) next;
	50	} CryptoDevBackendBuiltinSession;
	51
	52	/* Max number of symmetric sessions */
	53	#define MAX_NUM_SESSIONS 256
	54
	55	#define CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN 512
	56	#define CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN 64
	57
	58	struct CryptoDevBackendBuiltin {
	59	CryptoDevBackend parent_obj;
	60
	61	CryptoDevBackendBuiltinSession *sessions[MAX_NUM_SESSIONS];
	62	};
	63
	64	static void cryptodev_builtin_init(
65	CryptoDevBackend backend, Error *errp)
66	{
67	/* Only support one queue */
68	int queues = backend->conf.peers.queues;
69	CryptoDevBackendClient *cc;
70
71	if (queues != 1) {
72	error_setg(errp,
73	"Only support one queue in cryptdov-builtin backend");
74	return;
75	}
76
77	cc = cryptodev_backend_new_client(
78	"cryptodev-builtin", NULL);
79	cc->info_str = g_strdup_printf("cryptodev-builtin0");
80	cc->queue_index = 0;
81	backend->conf.peers.ccs[0] = cc;
82
83	backend->conf.crypto_services =
84	1u << VIRTIO_CRYPTO_SERVICE_CIPHER \|
85	1u << VIRTIO_CRYPTO_SERVICE_HASH \|
86	1u << VIRTIO_CRYPTO_SERVICE_MAC;
87	backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
88	backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
89	/*
90	* Set the Maximum length of crypto request.
91	* Why this value? Just avoid to overflow when
92	* memory allocation for each crypto request.
93	*/
94	backend->conf.max_size = LONG_MAX - sizeof(CryptoDevBackendSymOpInfo);
95	backend->conf.max_cipher_key_len = CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN;
96	backend->conf.max_auth_key_len = CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN;
97	}
98
99	static int
100	cryptodev_builtin_get_unused_session_index(
101	CryptoDevBackendBuiltin *builtin)
102	{
103	size_t i;
104
105	for (i = 0; i < MAX_NUM_SESSIONS; i++) {
106	if (builtin->sessions[i] == NULL) {
107	return i;
108	}
109	}
110
111	return -1;
112	}
113
465f2fed LM	114	#define AES_KEYSIZE_128 16
	115	#define AES_KEYSIZE_192 24
	116	#define AES_KEYSIZE_256 32
	117	#define AES_KEYSIZE_128_XTS AES_KEYSIZE_256
	118	#define AES_KEYSIZE_256_XTS 64
	119
1653a5f3	120	static int
465f2fed	121	cryptodev_builtin_get_aes_algo(uint32_t key_len, int mode, Error **errp)
1653a5f3 GA	122	{
	123	int algo;
	124
465f2fed	125	if (key_len == AES_KEYSIZE_128) {
1653a5f3	126	algo = QCRYPTO_CIPHER_ALG_AES_128;
465f2fed	127	} else if (key_len == AES_KEYSIZE_192) {
1653a5f3	128	algo = QCRYPTO_CIPHER_ALG_AES_192;
465f2fed LM	129	} else if (key_len == AES_KEYSIZE_256) { /* equals AES_KEYSIZE_128_XTS */
	130	if (mode == QCRYPTO_CIPHER_MODE_XTS) {
	131	algo = QCRYPTO_CIPHER_ALG_AES_128;
	132	} else {
	133	algo = QCRYPTO_CIPHER_ALG_AES_256;
	134	}
	135	} else if (key_len == AES_KEYSIZE_256_XTS) {
	136	if (mode == QCRYPTO_CIPHER_MODE_XTS) {
	137	algo = QCRYPTO_CIPHER_ALG_AES_256;
	138	} else {
	139	goto err;
	140	}
1653a5f3	141	} else {
465f2fed	142	goto err;
1653a5f3 GA	143	}
	144
	145	return algo;
465f2fed LM	146
	147	err:
	148	error_setg(errp, "Unsupported key length :%u", key_len);
	149	return -1;
1653a5f3 GA	150	}
	151
	152	static int cryptodev_builtin_create_cipher_session(
	153	CryptoDevBackendBuiltin *builtin,
	154	CryptoDevBackendSymSessionInfo *sess_info,
	155	Error **errp)
	156	{
	157	int algo;
	158	int mode;
	159	QCryptoCipher *cipher;
	160	int index;
	161	CryptoDevBackendBuiltinSession *sess;
	162
	163	if (sess_info->op_type != VIRTIO_CRYPTO_SYM_OP_CIPHER) {
	164	error_setg(errp, "Unsupported optype :%u", sess_info->op_type);
	165	return -1;
	166	}
	167
	168	index = cryptodev_builtin_get_unused_session_index(builtin);
	169	if (index < 0) {
	170	error_setg(errp, "Total number of sessions created exceeds %u",
	171	MAX_NUM_SESSIONS);
	172	return -1;
	173	}
	174
	175	switch (sess_info->cipher_alg) {
	176	case VIRTIO_CRYPTO_CIPHER_AES_ECB:
465f2fed	177	mode = QCRYPTO_CIPHER_MODE_ECB;
1653a5f3	178	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
465f2fed	179	mode, errp);
1653a5f3 GA	180	if (algo < 0) {
	181	return -1;
	182	}
1653a5f3 GA	183	break;
1653a5f3 GA	184	case VIRTIO_CRYPTO_CIPHER_AES_CBC:
465f2fed	185	mode = QCRYPTO_CIPHER_MODE_CBC;
1653a5f3	186	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
465f2fed	187	mode, errp);
1653a5f3 GA	188	if (algo < 0) {
	189	return -1;
	190	}
1653a5f3 GA	191	break;
1653a5f3 GA	192	case VIRTIO_CRYPTO_CIPHER_AES_CTR:
465f2fed	193	mode = QCRYPTO_CIPHER_MODE_CTR;
1653a5f3	194	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
465f2fed	195	mode, errp);
1653a5f3 GA	196	if (algo < 0) {
	197	return -1;
	198	}
1653a5f3	199	break;
eaa57403 LM	200	case VIRTIO_CRYPTO_CIPHER_AES_XTS:
	201	mode = QCRYPTO_CIPHER_MODE_XTS;
	202	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
	203	mode, errp);
	204	if (algo < 0) {
	205	return -1;
	206	}
	207	break;
1653a5f3 GA	208	default:
	209	error_setg(errp, "Unsupported cipher alg :%u",
	210	sess_info->cipher_alg);
	211	return -1;
	212	}
	213
	214	cipher = qcrypto_cipher_new(algo, mode,
	215	sess_info->cipher_key,
	216	sess_info->key_len,
	217	errp);
	218	if (!cipher) {
	219	return -1;
	220	}
	221
	222	sess = g_new0(CryptoDevBackendBuiltinSession, 1);
	223	sess->cipher = cipher;
	224	sess->direction = sess_info->direction;
	225	sess->type = sess_info->op_type;
	226
	227	builtin->sessions[index] = sess;
	228
	229	return index;
	230	}
	231
	232	static int64_t cryptodev_builtin_sym_create_session(
	233	CryptoDevBackend *backend,
	234	CryptoDevBackendSymSessionInfo *sess_info,
	235	uint32_t queue_index, Error **errp)
	236	{
	237	CryptoDevBackendBuiltin *builtin =
	238	CRYPTODEV_BACKEND_BUILTIN(backend);
	239	int64_t session_id = -1;
	240	int ret;
	241
	242	switch (sess_info->op_code) {
	243	case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
	244	ret = cryptodev_builtin_create_cipher_session(
	245	builtin, sess_info, errp);
	246	if (ret < 0) {
	247	return ret;
	248	} else {
	249	session_id = ret;
	250	}
	251	break;
	252	case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
	253	case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
	254	default:
	255	error_setg(errp, "Unsupported opcode :%" PRIu32 "",
	256	sess_info->op_code);
	257	return -1;
	258	}
	259
	260	return session_id;
	261	}
	262
	263	static int cryptodev_builtin_sym_close_session(
	264	CryptoDevBackend *backend,
	265	uint64_t session_id,
	266	uint32_t queue_index, Error **errp)
	267	{
	268	CryptoDevBackendBuiltin *builtin =
	269	CRYPTODEV_BACKEND_BUILTIN(backend);
	270
	271	if (session_id >= MAX_NUM_SESSIONS \|\|
272	builtin->sessions[session_id] == NULL) {
273	error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
274	session_id);
275	return -1;
276	}
277
278	qcrypto_cipher_free(builtin->sessions[session_id]->cipher);
279	g_free(builtin->sessions[session_id]);
280	builtin->sessions[session_id] = NULL;
281	return 0;
282	}
283
284	static int cryptodev_builtin_sym_operation(
285	CryptoDevBackend *backend,
286	CryptoDevBackendSymOpInfo *op_info,
287	uint32_t queue_index, Error **errp)
288	{
289	CryptoDevBackendBuiltin *builtin =
290	CRYPTODEV_BACKEND_BUILTIN(backend);
291	CryptoDevBackendBuiltinSession *sess;
292	int ret;
293
294	if (op_info->session_id >= MAX_NUM_SESSIONS \|\|
295	builtin->sessions[op_info->session_id] == NULL) {
296	error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
297	op_info->session_id);
298	return -VIRTIO_CRYPTO_INVSESS;
299	}
300
301	if (op_info->op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
302	error_setg(errp,
303	"Algorithm chain is unsupported for cryptdoev-builtin");
304	return -VIRTIO_CRYPTO_NOTSUPP;
305	}
306
307	sess = builtin->sessions[op_info->session_id];
308
309	ret = qcrypto_cipher_setiv(sess->cipher, op_info->iv,
310	op_info->iv_len, errp);
311	if (ret < 0) {
312	return -VIRTIO_CRYPTO_ERR;
313	}
314
315	if (sess->direction == VIRTIO_CRYPTO_OP_ENCRYPT) {
316	ret = qcrypto_cipher_encrypt(sess->cipher, op_info->src,
317	op_info->dst, op_info->src_len, errp);
318	if (ret < 0) {
319	return -VIRTIO_CRYPTO_ERR;
320	}
321	} else {
322	ret = qcrypto_cipher_decrypt(sess->cipher, op_info->src,
323	op_info->dst, op_info->src_len, errp);
324	if (ret < 0) {
325	return -VIRTIO_CRYPTO_ERR;
326	}
327	}
328	return VIRTIO_CRYPTO_OK;
329	}
330
331	static void cryptodev_builtin_cleanup(
332	CryptoDevBackend *backend,
333	Error **errp)
334	{
335	CryptoDevBackendBuiltin *builtin =
336	CRYPTODEV_BACKEND_BUILTIN(backend);
337	size_t i;
338	int queues = backend->conf.peers.queues;
339	CryptoDevBackendClient *cc;
340
341	for (i = 0; i < MAX_NUM_SESSIONS; i++) {
342	if (builtin->sessions[i] != NULL) {
343	cryptodev_builtin_sym_close_session(
344	backend, i, 0, errp);
345	}
346	}
347
348	assert(queues == 1);
349
350	for (i = 0; i < queues; i++) {
351	cc = backend->conf.peers.ccs[i];
352	if (cc) {
353	cryptodev_backend_free_client(cc);
354	backend->conf.peers.ccs[i] = NULL;
355	}
356	}
357	}
358
359	static void
360	cryptodev_builtin_class_init(ObjectClass oc, void data)
361	{
362	CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
363
364	bc->init = cryptodev_builtin_init;
365	bc->cleanup = cryptodev_builtin_cleanup;
366	bc->create_session = cryptodev_builtin_sym_create_session;
367	bc->close_session = cryptodev_builtin_sym_close_session;
368	bc->do_sym_op = cryptodev_builtin_sym_operation;
369	}
370
371	static const TypeInfo cryptodev_builtin_info = {
372	.name = TYPE_CRYPTODEV_BACKEND_BUILTIN,
373	.parent = TYPE_CRYPTODEV_BACKEND,
374	.class_init = cryptodev_builtin_class_init,
375	.instance_size = sizeof(CryptoDevBackendBuiltin),
376	};
377
378	static void
379	cryptodev_builtin_register_types(void)
380	{
381	type_register_static(&cryptodev_builtin_info);
382	}
383
384	type_init(cryptodev_builtin_register_types);