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
  13 struct 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
  24 struct crypto_akcipher_spawn {
  25         struct crypto_spawn base;
  26 };
  27
  28 /*
  29  * Transform internal helpers.
  30  */
  31 static inline void *akcipher_request_ctx(struct akcipher_request *req)
  32 {
  33         return req->__ctx;
  34 }
  35
  36 static inline void akcipher_set_reqsize(struct crypto_akcipher *akcipher,
  37                                         unsigned int reqsize)
  38 {
  39         crypto_akcipher_alg(akcipher)->reqsize = reqsize;
  40 }
  41
  42 static inline void *akcipher_tfm_ctx(struct crypto_akcipher *tfm)
  43 {
  44         return tfm->base.__crt_ctx;
  45 }
  46
  47 static inline void akcipher_request_complete(struct akcipher_request *req,
  48                                              int err)
  49 {
  50         req->base.complete(&req->base, err);
  51 }
  52
  53 static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
  54 {
  55         return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
  56 }
  57
  58 static 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
  64 static 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
  70 static 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
  76 static inline void *akcipher_instance_ctx(struct akcipher_instance *inst)
  77 {
  78         return crypto_instance_ctx(akcipher_crypto_instance(inst));
  79 }
  80
  81 int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn,
  82                          struct crypto_instance *inst,
  83                          const char *name, u32 type, u32 mask);
  84
  85 static inline struct crypto_akcipher *crypto_spawn_akcipher(
  86                 struct crypto_akcipher_spawn *spawn)
  87 {
  88         return crypto_spawn_tfm2(&spawn->base);
  89 }
  90
  91 static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
  92 {
  93         crypto_drop_spawn(&spawn->base);
  94 }
  95
  96 static 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  */
 111 int 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  */
 120 void 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  */
 131 int akcipher_register_instance(struct crypto_template *tmpl,
 132                 struct akcipher_instance *inst);
 133 #endif