include/sysemu/cryptodev.h

   1 /*
   2  * QEMU Crypto Device Implementation
   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 #ifndef CRYPTODEV_H
  24 #define CRYPTODEV_H
  25
  26 #include "qom/object.h"
  27 #include "qemu-common.h"
  28
  29 /**
  30  * CryptoDevBackend:
  31  *
  32  * The CryptoDevBackend object is an interface
  33  * for different cryptodev backends, which provides crypto
  34  * operation wrapper.
  35  *
  36  */
  37
  38 #define TYPE_CRYPTODEV_BACKEND "cryptodev-backend"
  39
  40 #define CRYPTODEV_BACKEND(obj) \
  41     OBJECT_CHECK(CryptoDevBackend, \
  42                  (obj), TYPE_CRYPTODEV_BACKEND)
  43 #define CRYPTODEV_BACKEND_GET_CLASS(obj) \
  44     OBJECT_GET_CLASS(CryptoDevBackendClass, \
  45                  (obj), TYPE_CRYPTODEV_BACKEND)
  46 #define CRYPTODEV_BACKEND_CLASS(klass) \
  47     OBJECT_CLASS_CHECK(CryptoDevBackendClass, \
  48                 (klass), TYPE_CRYPTODEV_BACKEND)
  49
  50
  51 #define MAX_CRYPTO_QUEUE_NUM  64
  52
  53 typedef struct CryptoDevBackendConf CryptoDevBackendConf;
  54 typedef struct CryptoDevBackendPeers CryptoDevBackendPeers;
  55 typedef struct CryptoDevBackendClient
  56                      CryptoDevBackendClient;
  57 typedef struct CryptoDevBackend CryptoDevBackend;
  58
  59 enum CryptoDevBackendAlgType {
  60     CRYPTODEV_BACKEND_ALG_SYM,
  61     CRYPTODEV_BACKEND_ALG__MAX,
  62 };
  63
  64 /**
  65  * CryptoDevBackendSymSessionInfo:
  66  *
  67  * @op_code: operation code (refer to virtio_crypto.h)
  68  * @cipher_alg: algorithm type of CIPHER
  69  * @key_len: byte length of cipher key
  70  * @hash_alg: algorithm type of HASH/MAC
  71  * @hash_result_len: byte length of HASH operation result
  72  * @auth_key_len: byte length of authenticated key
  73  * @add_len: byte length of additional authenticated data
  74  * @op_type: operation type (refer to virtio_crypto.h)
  75  * @direction: encryption or direction for CIPHER
  76  * @hash_mode: HASH mode for HASH operation (refer to virtio_crypto.h)
  77  * @alg_chain_order: order of algorithm chaining (CIPHER then HASH,
  78  *                   or HASH then CIPHER)
  79  * @cipher_key: point to a key of CIPHER
  80  * @auth_key: point to an authenticated key of MAC
  81  *
  82  */
  83 typedef struct CryptoDevBackendSymSessionInfo {
  84     /* corresponding with virtio crypto spec */
  85     uint32_t op_code;
  86     uint32_t cipher_alg;
  87     uint32_t key_len;
  88     uint32_t hash_alg;
  89     uint32_t hash_result_len;
  90     uint32_t auth_key_len;
  91     uint32_t add_len;
  92     uint8_t op_type;
  93     uint8_t direction;
  94     uint8_t hash_mode;
  95     uint8_t alg_chain_order;
  96     uint8_t *cipher_key;
  97     uint8_t *auth_key;
  98 } CryptoDevBackendSymSessionInfo;
  99
 100 /**
 101  * CryptoDevBackendSymOpInfo:
 102  *
 103  * @session_id: session index which was previously
 104  *              created by cryptodev_backend_sym_create_session()
 105  * @aad_len: byte length of additional authenticated data
 106  * @iv_len: byte length of initialization vector or counter
 107  * @src_len: byte length of source data
 108  * @dst_len: byte length of destination data
 109  * @digest_result_len: byte length of hash digest result
 110  * @hash_start_src_offset: Starting point for hash processing, specified
 111  *  as number of bytes from start of packet in source data, only used for
 112  *  algorithm chain
 113  * @cipher_start_src_offset: Starting point for cipher processing, specified
 114  *  as number of bytes from start of packet in source data, only used for
 115  *  algorithm chain
 116  * @len_to_hash: byte length of source data on which the hash
 117  *  operation will be computed, only used for algorithm chain
 118  * @len_to_cipher: byte length of source data on which the cipher
 119  *  operation will be computed, only used for algorithm chain
 120  * @op_type: operation type (refer to virtio_crypto.h)
 121  * @iv: point to the initialization vector or counter
 122  * @src: point to the source data
 123  * @dst: point to the destination data
 124  * @aad_data: point to the additional authenticated data
 125  * @digest_result: point to the digest result data
 126  * @data[0]: point to the extensional memory by one memory allocation
 127  *
 128  */
 129 typedef struct CryptoDevBackendSymOpInfo {
 130     uint64_t session_id;
 131     uint32_t aad_len;
 132     uint32_t iv_len;
 133     uint32_t src_len;
 134     uint32_t dst_len;
 135     uint32_t digest_result_len;
 136     uint32_t hash_start_src_offset;
 137     uint32_t cipher_start_src_offset;
 138     uint32_t len_to_hash;
 139     uint32_t len_to_cipher;
 140     uint8_t op_type;
 141     uint8_t *iv;
 142     uint8_t *src;
 143     uint8_t *dst;
 144     uint8_t *aad_data;
 145     uint8_t *digest_result;
 146     uint8_t data[0];
 147 } CryptoDevBackendSymOpInfo;
 148
 149 typedef struct CryptoDevBackendClass {
 150     ObjectClass parent_class;
 151
 152     void (*init)(CryptoDevBackend *backend, Error **errp);
 153     void (*cleanup)(CryptoDevBackend *backend, Error **errp);
 154
 155     int64_t (*create_session)(CryptoDevBackend *backend,
 156                        CryptoDevBackendSymSessionInfo *sess_info,
 157                        uint32_t queue_index, Error **errp);
 158     int (*close_session)(CryptoDevBackend *backend,
 159                            uint64_t session_id,
 160                            uint32_t queue_index, Error **errp);
 161     int (*do_sym_op)(CryptoDevBackend *backend,
 162                      CryptoDevBackendSymOpInfo *op_info,
 163                      uint32_t queue_index, Error **errp);
 164 } CryptoDevBackendClass;
 165
 166
 167 struct CryptoDevBackendClient {
 168     char *model;
 169     char *name;
 170     char *info_str;
 171     unsigned int queue_index;
 172     QTAILQ_ENTRY(CryptoDevBackendClient) next;
 173 };
 174
 175 struct CryptoDevBackendPeers {
 176     CryptoDevBackendClient *ccs[MAX_CRYPTO_QUEUE_NUM];
 177     uint32_t queues;
 178 };
 179
 180 struct CryptoDevBackendConf {
 181     CryptoDevBackendPeers peers;
 182
 183     /* Supported service mask */
 184     uint32_t crypto_services;
 185
 186     /* Detailed algorithms mask */
 187     uint32_t cipher_algo_l;
 188     uint32_t cipher_algo_h;
 189     uint32_t hash_algo;
 190     uint32_t mac_algo_l;
 191     uint32_t mac_algo_h;
 192     uint32_t aead_algo;
 193     /* Maximum length of cipher key */
 194     uint32_t max_cipher_key_len;
 195     /* Maximum length of authenticated key */
 196     uint32_t max_auth_key_len;
 197     /* Maximum size of each crypto request's content */
 198     uint64_t max_size;
 199 };
 200
 201 struct CryptoDevBackend {
 202     Object parent_obj;
 203
 204     bool ready;
 205     CryptoDevBackendConf conf;
 206 };
 207
 208 /**
 209  * cryptodev_backend_new_client:
 210  * @model: the cryptodev backend model
 211  * @name: the cryptodev backend name, can be NULL
 212  *
 213  * Creates a new cryptodev backend client object
 214  * with the @name in the model @model.
 215  *
 216  * The returned object must be released with
 217  * cryptodev_backend_free_client() when no
 218  * longer required
 219  *
 220  * Returns: a new cryptodev backend client object
 221  */
 222 CryptoDevBackendClient *
 223 cryptodev_backend_new_client(const char *model,
 224                                     const char *name);
 225 /**
 226  * cryptodev_backend_free_client:
 227  * @cc: the cryptodev backend client object
 228  *
 229  * Release the memory associated with @cc that
 230  * was previously allocated by cryptodev_backend_new_client()
 231  */
 232 void cryptodev_backend_free_client(
 233                   CryptoDevBackendClient *cc);
 234
 235 /**
 236  * cryptodev_backend_cleanup:
 237  * @backend: the cryptodev backend object
 238  * @errp: pointer to a NULL-initialized error object
 239  *
 240  * Clean the resouce associated with @backend that realizaed
 241  * by the specific backend's init() callback
 242  */
 243 void cryptodev_backend_cleanup(
 244            CryptoDevBackend *backend,
 245            Error **errp);
 246
 247 /**
 248  * cryptodev_backend_sym_create_session:
 249  * @backend: the cryptodev backend object
 250  * @sess_info: parameters needed by session creating
 251  * @queue_index: queue index of cryptodev backend client
 252  * @errp: pointer to a NULL-initialized error object
 253  *
 254  * Create a session for symmetric algorithms
 255  *
 256  * Returns: session id on success, or -1 on error
 257  */
 258 int64_t cryptodev_backend_sym_create_session(
 259            CryptoDevBackend *backend,
 260            CryptoDevBackendSymSessionInfo *sess_info,
 261            uint32_t queue_index, Error **errp);
 262
 263 /**
 264  * cryptodev_backend_sym_close_session:
 265  * @backend: the cryptodev backend object
 266  * @session_id: the session id
 267  * @queue_index: queue index of cryptodev backend client
 268  * @errp: pointer to a NULL-initialized error object
 269  *
 270  * Close a session for symmetric algorithms which was previously
 271  * created by cryptodev_backend_sym_create_session()
 272  *
 273  * Returns: 0 on success, or Negative on error
 274  */
 275 int cryptodev_backend_sym_close_session(
 276            CryptoDevBackend *backend,
 277            uint64_t session_id,
 278            uint32_t queue_index, Error **errp);
 279
 280 /**
 281  * cryptodev_backend_crypto_operation:
 282  * @backend: the cryptodev backend object
 283  * @opaque: pointer to a VirtIOCryptoReq object
 284  * @queue_index: queue index of cryptodev backend client
 285  * @errp: pointer to a NULL-initialized error object
 286  *
 287  * Do crypto operation, such as encryption and
 288  * decryption
 289  *
 290  * Returns: VIRTIO_CRYPTO_OK on success,
 291  *         or -VIRTIO_CRYPTO_* on error
 292  */
 293 int cryptodev_backend_crypto_operation(
 294                  CryptoDevBackend *backend,
 295                  void *opaque,
 296                  uint32_t queue_index, Error **errp);
 297
 298 #endif /* CRYPTODEV_H */