/*
* QEMU Crypto Device Implementation
*
* 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/>.
*
*/
#ifndef CRYPTODEV_H
#define CRYPTODEV_H
#include "qemu/queue.h"
#include "qom/object.h"
/**
* CryptoDevBackend:
*
* The CryptoDevBackend object is an interface
* for different cryptodev backends, which provides crypto
* operation wrapper.
*
*/
#define TYPE_CRYPTODEV_BACKEND "cryptodev-backend"
OBJECT_DECLARE_TYPE(CryptoDevBackend, CryptoDevBackendClass,
CRYPTODEV_BACKEND)
#define MAX_CRYPTO_QUEUE_NUM 64
typedef struct CryptoDevBackendConf CryptoDevBackendConf;
typedef struct CryptoDevBackendPeers CryptoDevBackendPeers;
typedef struct CryptoDevBackendClient
CryptoDevBackendClient;
enum CryptoDevBackendAlgType {
CRYPTODEV_BACKEND_ALG_SYM,
CRYPTODEV_BACKEND_ALG__MAX,
};
/**
* CryptoDevBackendSymSessionInfo:
*
* @op_code: operation code (refer to virtio_crypto.h)
* @cipher_alg: algorithm type of CIPHER
* @key_len: byte length of cipher key
* @hash_alg: algorithm type of HASH/MAC
* @hash_result_len: byte length of HASH operation result
* @auth_key_len: byte length of authenticated key
* @add_len: byte length of additional authenticated data
* @op_type: operation type (refer to virtio_crypto.h)
* @direction: encryption or direction for CIPHER
* @hash_mode: HASH mode for HASH operation (refer to virtio_crypto.h)
* @alg_chain_order: order of algorithm chaining (CIPHER then HASH,
* or HASH then CIPHER)
* @cipher_key: point to a key of CIPHER
* @auth_key: point to an authenticated key of MAC
*
*/
typedef struct CryptoDevBackendSymSessionInfo {
/* corresponding with virtio crypto spec */
uint32_t op_code;
uint32_t cipher_alg;
uint32_t key_len;
uint32_t hash_alg;
uint32_t hash_result_len;
uint32_t auth_key_len;
uint32_t add_len;
uint8_t op_type;
uint8_t direction;
uint8_t hash_mode;
uint8_t alg_chain_order;
uint8_t *cipher_key;
uint8_t *auth_key;
} CryptoDevBackendSymSessionInfo;
/**
* CryptoDevBackendSymOpInfo:
*
* @session_id: session index which was previously
* created by cryptodev_backend_sym_create_session()
* @aad_len: byte length of additional authenticated data
* @iv_len: byte length of initialization vector or counter
* @src_len: byte length of source data
* @dst_len: byte length of destination data
* @digest_result_len: byte length of hash digest result
* @hash_start_src_offset: Starting point for hash processing, specified
* as number of bytes from start of packet in source data, only used for
* algorithm chain
* @cipher_start_src_offset: Starting point for cipher processing, specified
* as number of bytes from start of packet in source data, only used for
* algorithm chain
* @len_to_hash: byte length of source data on which the hash
* operation will be computed, only used for algorithm chain
* @len_to_cipher: byte length of source data on which the cipher
* operation will be computed, only used for algorithm chain
* @op_type: operation type (refer to virtio_crypto.h)
* @iv: point to the initialization vector or counter
* @src: point to the source data
* @dst: point to the destination data
* @aad_data: point to the additional authenticated data
* @digest_result: point to the digest result data
* @data[0]: point to the extensional memory by one memory allocation
*
*/
typedef struct CryptoDevBackendSymOpInfo {
uint64_t session_id;
uint32_t aad_len;
uint32_t iv_len;
uint32_t src_len;
uint32_t dst_len;
uint32_t digest_result_len;
uint32_t hash_start_src_offset;
uint32_t cipher_start_src_offset;
uint32_t len_to_hash;
uint32_t len_to_cipher;
uint8_t op_type;
uint8_t *iv;
uint8_t *src;
uint8_t *dst;
uint8_t *aad_data;
uint8_t *digest_result;
uint8_t data[];
} CryptoDevBackendSymOpInfo;
struct CryptoDevBackendClass {
ObjectClass parent_class;
void (*init)(CryptoDevBackend *backend, Error **errp);
void (*cleanup)(CryptoDevBackend *backend, Error **errp);
int64_t (*create_session)(CryptoDevBackend *backend,
CryptoDevBackendSymSessionInfo *sess_info,
uint32_t queue_index, Error **errp);
int (*close_session)(CryptoDevBackend *backend,
uint64_t session_id,
uint32_t queue_index, Error **errp);
int (*do_sym_op)(CryptoDevBackend *backend,
CryptoDevBackendSymOpInfo *op_info,
uint32_t queue_index, Error **errp);
};
typedef enum CryptoDevBackendOptionsType {
CRYPTODEV_BACKEND_TYPE_NONE = 0,
CRYPTODEV_BACKEND_TYPE_BUILTIN = 1,
CRYPTODEV_BACKEND_TYPE_VHOST_USER = 2,
CRYPTODEV_BACKEND_TYPE__MAX,
} CryptoDevBackendOptionsType;
struct CryptoDevBackendClient {
CryptoDevBackendOptionsType type;
char *model;
char *name;
char *info_str;
unsigned int queue_index;
int vring_enable;
QTAILQ_ENTRY(CryptoDevBackendClient) next;
};
struct CryptoDevBackendPeers {
CryptoDevBackendClient *ccs[MAX_CRYPTO_QUEUE_NUM];
uint32_t queues;
};
struct CryptoDevBackendConf {
CryptoDevBackendPeers peers;
/* Supported service mask */
uint32_t crypto_services;
/* Detailed algorithms mask */
uint32_t cipher_algo_l;
uint32_t cipher_algo_h;
uint32_t hash_algo;
uint32_t mac_algo_l;
uint32_t mac_algo_h;
uint32_t aead_algo;
/* Maximum length of cipher key */
uint32_t max_cipher_key_len;
/* Maximum length of authenticated key */
uint32_t max_auth_key_len;
/* Maximum size of each crypto request's content */
uint64_t max_size;
};
struct CryptoDevBackend {
Object parent_obj;
bool ready;
/* Tag the cryptodev backend is used by virtio-crypto or not */
bool is_used;
CryptoDevBackendConf conf;
};
/**
* cryptodev_backend_new_client:
* @model: the cryptodev backend model
* @name: the cryptodev backend name, can be NULL
*
* Creates a new cryptodev backend client object
* with the @name in the model @model.
*
* The returned object must be released with
* cryptodev_backend_free_client() when no
* longer required
*
* Returns: a new cryptodev backend client object
*/
CryptoDevBackendClient *
cryptodev_backend_new_client(const char *model,
const char *name);
/**
* cryptodev_backend_free_client:
* @cc: the cryptodev backend client object
*
* Release the memory associated with @cc that
* was previously allocated by cryptodev_backend_new_client()
*/
void cryptodev_backend_free_client(
CryptoDevBackendClient *cc);
/**
* cryptodev_backend_cleanup:
* @backend: the cryptodev backend object
* @errp: pointer to a NULL-initialized error object
*
* Clean the resouce associated with @backend that realizaed
* by the specific backend's init() callback
*/
void cryptodev_backend_cleanup(
CryptoDevBackend *backend,
Error **errp);
/**
* cryptodev_backend_sym_create_session:
* @backend: the cryptodev backend object
* @sess_info: parameters needed by session creating
* @queue_index: queue index of cryptodev backend client
* @errp: pointer to a NULL-initialized error object
*
* Create a session for symmetric algorithms
*
* Returns: session id on success, or -1 on error
*/
int64_t cryptodev_backend_sym_create_session(
CryptoDevBackend *backend,
CryptoDevBackendSymSessionInfo *sess_info,
uint32_t queue_index, Error **errp);
/**
* cryptodev_backend_sym_close_session:
* @backend: the cryptodev backend object
* @session_id: the session id
* @queue_index: queue index of cryptodev backend client
* @errp: pointer to a NULL-initialized error object
*
* Close a session for symmetric algorithms which was previously
* created by cryptodev_backend_sym_create_session()
*
* Returns: 0 on success, or Negative on error
*/
int cryptodev_backend_sym_close_session(
CryptoDevBackend *backend,
uint64_t session_id,
uint32_t queue_index, Error **errp);
/**
* cryptodev_backend_crypto_operation:
* @backend: the cryptodev backend object
* @opaque: pointer to a VirtIOCryptoReq object
* @queue_index: queue index of cryptodev backend client
* @errp: pointer to a NULL-initialized error object
*
* Do crypto operation, such as encryption and
* decryption
*
* Returns: VIRTIO_CRYPTO_OK on success,
* or -VIRTIO_CRYPTO_* on error
*/
int cryptodev_backend_crypto_operation(
CryptoDevBackend *backend,
void *opaque,
uint32_t queue_index, Error **errp);
/**
* cryptodev_backend_set_used:
* @backend: the cryptodev backend object
* @used: ture or false
*
* Set the cryptodev backend is used by virtio-crypto or not
*/
void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used);
/**
* cryptodev_backend_is_used:
* @backend: the cryptodev backend object
*
* Return the status that the cryptodev backend is used
* by virtio-crypto or not
*
* Returns: true on used, or false on not used
*/
bool cryptodev_backend_is_used(CryptoDevBackend *backend);
/**
* cryptodev_backend_set_ready:
* @backend: the cryptodev backend object
* @ready: ture or false
*
* Set the cryptodev backend is ready or not, which is called
* by the children of the cryptodev banckend interface.
*/
void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready);
/**
* cryptodev_backend_is_ready:
* @backend: the cryptodev backend object
*
* Return the status that the cryptodev backend is ready or not
*
* Returns: true on ready, or false on not ready
*/
bool cryptodev_backend_is_ready(CryptoDevBackend *backend);
#endif /* CRYPTODEV_H */
