/* * QEMU Crypto Device Implementation * * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. * * Authors: * Gonglei * * 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 . * */ #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, 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 */