[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 2.1 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 "qapi/error.h"
#include "standard-headers/linux/virtio_crypto.h"
#include "crypto/cipher.h"
#include "qom/object.h"


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

OBJECT_DECLARE_SIMPLE_TYPE(CryptoDevBackendBuiltin, CRYPTODEV_BACKEND_BUILTIN)


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;
    cc->type = CRYPTODEV_BACKEND_TYPE_BUILTIN;
    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;

    cryptodev_backend_set_ready(backend, true);
}

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;
    case VIRTIO_CRYPTO_CIPHER_3DES_ECB:
        mode = QCRYPTO_CIPHER_MODE_ECB;
        algo = QCRYPTO_CIPHER_ALG_3DES;
        break;
    case VIRTIO_CRYPTO_CIPHER_3DES_CBC:
        mode = QCRYPTO_CIPHER_MODE_CBC;
        algo = QCRYPTO_CIPHER_ALG_3DES;
        break;
    case VIRTIO_CRYPTO_CIPHER_3DES_CTR:
        mode = QCRYPTO_CIPHER_MODE_CTR;
        algo = QCRYPTO_CIPHER_ALG_3DES;
        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);

    assert(session_id < MAX_NUM_SESSIONS && builtin->sessions[session_id]);

    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];

    if (op_info->iv_len > 0) {
        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, &error_abort);
        }
    }

    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;
        }
    }

    cryptodev_backend_set_ready(backend, false);
}

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
0dda001b	12	* version 2.1 of the License, or (at your option) any later version.
1653a5f3 GA	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"
1653a5f3 GA	26	#include "qapi/error.h"
	27	#include "standard-headers/linux/virtio_crypto.h"
	28	#include "crypto/cipher.h"
db1015e9	29	#include "qom/object.h"
1653a5f3 GA	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
8063396b	38	OBJECT_DECLARE_SIMPLE_TYPE(CryptoDevBackendBuiltin, CRYPTODEV_BACKEND_BUILTIN)
1653a5f3	39
1653a5f3 GA	40
	41	typedef struct CryptoDevBackendBuiltinSession {
	42	QCryptoCipher *cipher;
	43	uint8_t direction; /* encryption or decryption */
	44	uint8_t type; /* cipher? hash? aead? */
	45	QTAILQ_ENTRY(CryptoDevBackendBuiltinSession) next;
	46	} CryptoDevBackendBuiltinSession;
	47
	48	/* Max number of symmetric sessions */
	49	#define MAX_NUM_SESSIONS 256
	50
	51	#define CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN 512
	52	#define CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN 64
	53
	54	struct CryptoDevBackendBuiltin {
	55	CryptoDevBackend parent_obj;
	56
	57	CryptoDevBackendBuiltinSession *sessions[MAX_NUM_SESSIONS];
	58	};
	59
	60	static void cryptodev_builtin_init(
	61	CryptoDevBackend backend, Error *errp)
	62	{
	63	/* Only support one queue */
	64	int queues = backend->conf.peers.queues;
	65	CryptoDevBackendClient *cc;
	66
	67	if (queues != 1) {
	68	error_setg(errp,
	69	"Only support one queue in cryptdov-builtin backend");
	70	return;
	71	}
	72
	73	cc = cryptodev_backend_new_client(
	74	"cryptodev-builtin", NULL);
	75	cc->info_str = g_strdup_printf("cryptodev-builtin0");
	76	cc->queue_index = 0;
5da73dab	77	cc->type = CRYPTODEV_BACKEND_TYPE_BUILTIN;
1653a5f3 GA	78	backend->conf.peers.ccs[0] = cc;
	79
	80	backend->conf.crypto_services =
	81	1u << VIRTIO_CRYPTO_SERVICE_CIPHER \|
	82	1u << VIRTIO_CRYPTO_SERVICE_HASH \|
	83	1u << VIRTIO_CRYPTO_SERVICE_MAC;
	84	backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
	85	backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
	86	/*
	87	* Set the Maximum length of crypto request.
	88	* Why this value? Just avoid to overflow when
	89	* memory allocation for each crypto request.
	90	*/
	91	backend->conf.max_size = LONG_MAX - sizeof(CryptoDevBackendSymOpInfo);
	92	backend->conf.max_cipher_key_len = CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN;
	93	backend->conf.max_auth_key_len = CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN;
6138dbda GA	94
6138dbda GA	95	cryptodev_backend_set_ready(backend, true);
1653a5f3 GA	96	}
	97
	98	static int
	99	cryptodev_builtin_get_unused_session_index(
	100	CryptoDevBackendBuiltin *builtin)
	101	{
	102	size_t i;
	103
	104	for (i = 0; i < MAX_NUM_SESSIONS; i++) {
	105	if (builtin->sessions[i] == NULL) {
	106	return i;
	107	}
	108	}
	109
	110	return -1;
	111	}
	112
465f2fed LM	113	#define AES_KEYSIZE_128 16
	114	#define AES_KEYSIZE_192 24
	115	#define AES_KEYSIZE_256 32
	116	#define AES_KEYSIZE_128_XTS AES_KEYSIZE_256
	117	#define AES_KEYSIZE_256_XTS 64
	118
1653a5f3	119	static int
465f2fed	120	cryptodev_builtin_get_aes_algo(uint32_t key_len, int mode, Error **errp)
1653a5f3 GA	121	{
	122	int algo;
	123
465f2fed	124	if (key_len == AES_KEYSIZE_128) {
1653a5f3	125	algo = QCRYPTO_CIPHER_ALG_AES_128;
465f2fed	126	} else if (key_len == AES_KEYSIZE_192) {
1653a5f3	127	algo = QCRYPTO_CIPHER_ALG_AES_192;
465f2fed LM	128	} else if (key_len == AES_KEYSIZE_256) { /* equals AES_KEYSIZE_128_XTS */
	129	if (mode == QCRYPTO_CIPHER_MODE_XTS) {
	130	algo = QCRYPTO_CIPHER_ALG_AES_128;
	131	} else {
	132	algo = QCRYPTO_CIPHER_ALG_AES_256;
	133	}
	134	} else if (key_len == AES_KEYSIZE_256_XTS) {
	135	if (mode == QCRYPTO_CIPHER_MODE_XTS) {
	136	algo = QCRYPTO_CIPHER_ALG_AES_256;
	137	} else {
	138	goto err;
	139	}
1653a5f3	140	} else {
465f2fed	141	goto err;
1653a5f3 GA	142	}
	143
	144	return algo;
465f2fed LM	145
	146	err:
	147	error_setg(errp, "Unsupported key length :%u", key_len);
	148	return -1;
1653a5f3 GA	149	}
	150
	151	static int cryptodev_builtin_create_cipher_session(
	152	CryptoDevBackendBuiltin *builtin,
	153	CryptoDevBackendSymSessionInfo *sess_info,
	154	Error **errp)
	155	{
	156	int algo;
	157	int mode;
	158	QCryptoCipher *cipher;
	159	int index;
	160	CryptoDevBackendBuiltinSession *sess;
	161
	162	if (sess_info->op_type != VIRTIO_CRYPTO_SYM_OP_CIPHER) {
	163	error_setg(errp, "Unsupported optype :%u", sess_info->op_type);
	164	return -1;
	165	}
	166
	167	index = cryptodev_builtin_get_unused_session_index(builtin);
	168	if (index < 0) {
	169	error_setg(errp, "Total number of sessions created exceeds %u",
	170	MAX_NUM_SESSIONS);
	171	return -1;
	172	}
	173
	174	switch (sess_info->cipher_alg) {
	175	case VIRTIO_CRYPTO_CIPHER_AES_ECB:
465f2fed	176	mode = QCRYPTO_CIPHER_MODE_ECB;
1653a5f3	177	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
465f2fed	178	mode, errp);
1653a5f3 GA	179	if (algo < 0) {
	180	return -1;
	181	}
1653a5f3 GA	182	break;
1653a5f3 GA	183	case VIRTIO_CRYPTO_CIPHER_AES_CBC:
465f2fed	184	mode = QCRYPTO_CIPHER_MODE_CBC;
1653a5f3	185	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
465f2fed	186	mode, errp);
1653a5f3 GA	187	if (algo < 0) {
	188	return -1;
	189	}
1653a5f3 GA	190	break;
1653a5f3 GA	191	case VIRTIO_CRYPTO_CIPHER_AES_CTR:
465f2fed	192	mode = QCRYPTO_CIPHER_MODE_CTR;
1653a5f3	193	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
465f2fed	194	mode, errp);
1653a5f3 GA	195	if (algo < 0) {
	196	return -1;
	197	}
1653a5f3	198	break;
eaa57403 LM	199	case VIRTIO_CRYPTO_CIPHER_AES_XTS:
	200	mode = QCRYPTO_CIPHER_MODE_XTS;
	201	algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
	202	mode, errp);
	203	if (algo < 0) {
	204	return -1;
	205	}
	206	break;
48ae36c0 LM	207	case VIRTIO_CRYPTO_CIPHER_3DES_ECB:
	208	mode = QCRYPTO_CIPHER_MODE_ECB;
	209	algo = QCRYPTO_CIPHER_ALG_3DES;
	210	break;
	211	case VIRTIO_CRYPTO_CIPHER_3DES_CBC:
	212	mode = QCRYPTO_CIPHER_MODE_CBC;
	213	algo = QCRYPTO_CIPHER_ALG_3DES;
	214	break;
	215	case VIRTIO_CRYPTO_CIPHER_3DES_CTR:
	216	mode = QCRYPTO_CIPHER_MODE_CTR;
	217	algo = QCRYPTO_CIPHER_ALG_3DES;
	218	break;
1653a5f3 GA	219	default:
	220	error_setg(errp, "Unsupported cipher alg :%u",
	221	sess_info->cipher_alg);
	222	return -1;
	223	}
	224
	225	cipher = qcrypto_cipher_new(algo, mode,
	226	sess_info->cipher_key,
	227	sess_info->key_len,
	228	errp);
	229	if (!cipher) {
	230	return -1;
	231	}
	232
	233	sess = g_new0(CryptoDevBackendBuiltinSession, 1);
	234	sess->cipher = cipher;
	235	sess->direction = sess_info->direction;
	236	sess->type = sess_info->op_type;
	237
	238	builtin->sessions[index] = sess;
	239
	240	return index;
	241	}
	242
	243	static int64_t cryptodev_builtin_sym_create_session(
	244	CryptoDevBackend *backend,
	245	CryptoDevBackendSymSessionInfo *sess_info,
	246	uint32_t queue_index, Error **errp)
	247	{
	248	CryptoDevBackendBuiltin *builtin =
	249	CRYPTODEV_BACKEND_BUILTIN(backend);
	250	int64_t session_id = -1;
	251	int ret;
	252
	253	switch (sess_info->op_code) {
	254	case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
	255	ret = cryptodev_builtin_create_cipher_session(
	256	builtin, sess_info, errp);
	257	if (ret < 0) {
	258	return ret;
	259	} else {
	260	session_id = ret;
	261	}
	262	break;
	263	case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
	264	case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
	265	default:
	266	error_setg(errp, "Unsupported opcode :%" PRIu32 "",
	267	sess_info->op_code);
	268	return -1;
	269	}
	270
	271	return session_id;
	272	}
	273
	274	static int cryptodev_builtin_sym_close_session(
	275	CryptoDevBackend *backend,
	276	uint64_t session_id,
	277	uint32_t queue_index, Error **errp)
	278	{
	279	CryptoDevBackendBuiltin *builtin =
	280	CRYPTODEV_BACKEND_BUILTIN(backend);
	281
2a340b67	282	assert(session_id < MAX_NUM_SESSIONS && builtin->sessions[session_id]);
1653a5f3 GA	283
	284	qcrypto_cipher_free(builtin->sessions[session_id]->cipher);
	285	g_free(builtin->sessions[session_id]);
	286	builtin->sessions[session_id] = NULL;
	287	return 0;
	288	}
	289
	290	static int cryptodev_builtin_sym_operation(
	291	CryptoDevBackend *backend,
	292	CryptoDevBackendSymOpInfo *op_info,
	293	uint32_t queue_index, Error **errp)
	294	{
	295	CryptoDevBackendBuiltin *builtin =
	296	CRYPTODEV_BACKEND_BUILTIN(backend);
	297	CryptoDevBackendBuiltinSession *sess;
	298	int ret;
	299
	300	if (op_info->session_id >= MAX_NUM_SESSIONS \|\|
	301	builtin->sessions[op_info->session_id] == NULL) {
	302	error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
	303	op_info->session_id);
	304	return -VIRTIO_CRYPTO_INVSESS;
	305	}
	306
	307	if (op_info->op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
	308	error_setg(errp,
	309	"Algorithm chain is unsupported for cryptdoev-builtin");
	310	return -VIRTIO_CRYPTO_NOTSUPP;
	311	}
	312
	313	sess = builtin->sessions[op_info->session_id];
	314
50d19cf3 LM	315	if (op_info->iv_len > 0) {
	316	ret = qcrypto_cipher_setiv(sess->cipher, op_info->iv,
	317	op_info->iv_len, errp);
	318	if (ret < 0) {
	319	return -VIRTIO_CRYPTO_ERR;
	320	}
1653a5f3 GA	321	}
	322
	323	if (sess->direction == VIRTIO_CRYPTO_OP_ENCRYPT) {
	324	ret = qcrypto_cipher_encrypt(sess->cipher, op_info->src,
	325	op_info->dst, op_info->src_len, errp);
	326	if (ret < 0) {
	327	return -VIRTIO_CRYPTO_ERR;
	328	}
	329	} else {
	330	ret = qcrypto_cipher_decrypt(sess->cipher, op_info->src,
	331	op_info->dst, op_info->src_len, errp);
	332	if (ret < 0) {
	333	return -VIRTIO_CRYPTO_ERR;
	334	}
	335	}
	336	return VIRTIO_CRYPTO_OK;
	337	}
	338
	339	static void cryptodev_builtin_cleanup(
	340	CryptoDevBackend *backend,
	341	Error **errp)
	342	{
	343	CryptoDevBackendBuiltin *builtin =
	344	CRYPTODEV_BACKEND_BUILTIN(backend);
	345	size_t i;
	346	int queues = backend->conf.peers.queues;
	347	CryptoDevBackendClient *cc;
	348
	349	for (i = 0; i < MAX_NUM_SESSIONS; i++) {
	350	if (builtin->sessions[i] != NULL) {
2a340b67	351	cryptodev_builtin_sym_close_session(backend, i, 0, &error_abort);
1653a5f3 GA	352	}
	353	}
	354
1653a5f3 GA	355	for (i = 0; i < queues; i++) {
	356	cc = backend->conf.peers.ccs[i];
	357	if (cc) {
	358	cryptodev_backend_free_client(cc);
	359	backend->conf.peers.ccs[i] = NULL;
	360	}
	361	}
6138dbda GA	362
6138dbda GA	363	cryptodev_backend_set_ready(backend, false);
1653a5f3 GA	364	}
	365
	366	static void
	367	cryptodev_builtin_class_init(ObjectClass oc, void data)
	368	{
	369	CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
	370
	371	bc->init = cryptodev_builtin_init;
	372	bc->cleanup = cryptodev_builtin_cleanup;
	373	bc->create_session = cryptodev_builtin_sym_create_session;
	374	bc->close_session = cryptodev_builtin_sym_close_session;
	375	bc->do_sym_op = cryptodev_builtin_sym_operation;
	376	}
	377
	378	static const TypeInfo cryptodev_builtin_info = {
	379	.name = TYPE_CRYPTODEV_BACKEND_BUILTIN,
	380	.parent = TYPE_CRYPTODEV_BACKEND,
	381	.class_init = cryptodev_builtin_class_init,
	382	.instance_size = sizeof(CryptoDevBackendBuiltin),
	383	};
	384
	385	static void
	386	cryptodev_builtin_register_types(void)
	387	{
	388	type_register_static(&cryptodev_builtin_info);
	389	}
	390
	391	type_init(cryptodev_builtin_register_types);