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
  81int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
  82                         struct crypto_instance *inst,
  83                         const char *name, u32 type, u32 mask);
  84
  85static inline struct crypto_akcipher *crypto_spawn_akcipher(
  86                struct crypto_akcipher_spawn *spawn)
  87{
  88        return crypto_spawn_tfm2(&spawn->base);
  89}
  90
  91static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
  92{
  93        crypto_drop_spawn(&spawn->base);
  94}
  95
  96static inline struct akcipher_alg *crypto_spawn_akcipher_alg(
  97                struct crypto_akcipher_spawn *spawn)
  98{
  99        return container_of(spawn->base.alg, struct akcipher_alg, base);
 100}
 101
 102/**
 103 * crypto_register_akcipher() -- Register public key algorithm
 104 *
 105 * Function registers an implementation of a public key verify algorithm
 106 *
 107 * @alg:        algorithm definition
 108 *
 109 * Return: zero on success; error code in case of error
 110 */
 111int crypto_register_akcipher(struct akcipher_alg *alg);
 112
 113/**
 114 * crypto_unregister_akcipher() -- Unregister public key algorithm
 115 *
 116 * Function unregisters an implementation of a public key verify algorithm
 117 *
 118 * @alg:        algorithm definition
 119 */
 120void crypto_unregister_akcipher(struct akcipher_alg *alg);
 121
 122/**
 123 * akcipher_register_instance() -- Unregister public key template instance
 124 *
 125 * Function registers an implementation of an asymmetric key algorithm
 126 * created from a template
 127 *
 128 * @tmpl:       the template from which the algorithm was created
 129 * @inst:       the template instance
 130 */
 131int akcipher_register_instance(struct crypto_template *tmpl,
 132                struct akcipher_instance *inst);
 133#endif
 134