include/crypto/internal/akcipher.h

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