LXR linux/include/crypto/internal/akcipher.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Public Key Encryption
   4 *
   5 * Copyright (c) 2015, Intel Corporation
   6 * Authors: Tadeusz Struk <tadeusz.struk@intel.com>
   7 */
   8#ifndef _CRYPTO_AKCIPHER_INT_H
   9#define _CRYPTO_AKCIPHER_INT_H
  10#include <crypto/akcipher.h>
  11#include <crypto/algapi.h>
  12
  13struct akcipher_instance {
  14        void (*free)(struct akcipher_instance *inst);
  15        union {
  16                struct {
  17                        char head[offsetof(struct akcipher_alg, base)];
  18                        struct crypto_instance base;
  19                } s;
  20                struct akcipher_alg alg;
  21        };
  22};
  23
  24struct crypto_akcipher_spawn {
  25        struct crypto_spawn base;
  26};
  27
  28/*
  29 * Transform internal helpers.
  30 */
  31static inline void *akcipher_request_ctx(struct akcipher_request *req)
  32{
  33        return req->__ctx;
  34}
  35
  36static inline void akcipher_set_reqsize(struct crypto_akcipher *akcipher,
  37                                        unsigned int reqsize)
  38{
  39        crypto_akcipher_alg(akcipher)->reqsize = reqsize;
  40}
  41
  42static inline void *akcipher_tfm_ctx(struct crypto_akcipher *tfm)
  43{
  44        return tfm->base.__crt_ctx;
  45}
  46
  47static inline void akcipher_request_complete(struct akcipher_request *req,
  48                                             int err)
  49{
  50        req->base.complete(&req->base, err);
  51}
  52
  53static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
  54{
  55        return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
  56}
  57
  58static inline struct crypto_instance *akcipher_crypto_instance(
  59                struct akcipher_instance *inst)
  60{
  61        return container_of(&inst->alg.base, struct crypto_instance, alg);
  62}
  63
  64static inline struct akcipher_instance *akcipher_instance(
  65                struct crypto_instance *inst)
  66{
  67        return container_of(&inst->alg, struct akcipher_instance, alg.base);
  68}
  69
  70static inline struct akcipher_instance *akcipher_alg_instance(
  71                struct crypto_akcipher *akcipher)
  72{
  73        return akcipher_instance(crypto_tfm_alg_instance(&akcipher->base));
  74}
  75
  76static inline void *akcipher_instance_ctx(struct akcipher_instance *inst)
  77{
  78        return crypto_instance_ctx(akcipher_crypto_instance(inst));
  79}
  80
  81static inline void crypto_set_akcipher_spawn(
  82                struct crypto_akcipher_spawn *spawn,
  83                struct crypto_instance *inst)
  84{
  85        crypto_set_spawn(&spawn->base, inst);
  86}
  87
  88int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
  89                u32 type, u32 mask);
  90
  91static inline struct crypto_akcipher *crypto_spawn_akcipher(
  92                struct crypto_akcipher_spawn *spawn)
  93{
  94        return crypto_spawn_tfm2(&spawn->base);
  95}
  96
  97static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
  98{
  99        crypto_drop_spawn(&spawn->base);
 100}
 101
 102static inline struct akcipher_alg *crypto_spawn_akcipher_alg(
 103                struct crypto_akcipher_spawn *spawn)
 104{
 105        return container_of(spawn->base.alg, struct akcipher_alg, base);
 106}
 107
 108/**
 109 * crypto_register_akcipher() -- Register public key algorithm
 110 *
 111 * Function registers an implementation of a public key verify algorithm
 112 *
 113 * @alg:        algorithm definition
 114 *
 115 * Return: zero on success; error code in case of error
 116 */
 117int crypto_register_akcipher(struct akcipher_alg *alg);
 118
 119/**
 120 * crypto_unregister_akcipher() -- Unregister public key algorithm
 121 *
 122 * Function unregisters an implementation of a public key verify algorithm
 123 *
 124 * @alg:        algorithm definition
 125 */
 126void crypto_unregister_akcipher(struct akcipher_alg *alg);
 127
 128/**
 129 * akcipher_register_instance() -- Unregister public key template instance
 130 *
 131 * Function registers an implementation of an asymmetric key algorithm
 132 * created from a template
 133 *
 134 * @tmpl:       the template from which the algorithm was created
 135 * @inst:       the template instance
 136 */
 137int akcipher_register_instance(struct crypto_template *tmpl,
 138                struct akcipher_instance *inst);
 139#endif
 140