include/crypto/internal/aead.h

   1 /*
   2  * AEAD: Authenticated Encryption with Associated Data
   3  *
   4  * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  */
  12
  13 #ifndef _CRYPTO_INTERNAL_AEAD_H
  14 #define _CRYPTO_INTERNAL_AEAD_H
  15
  16 #include <crypto/aead.h>
  17 #include <crypto/algapi.h>
  18 #include <linux/stddef.h>
  19 #include <linux/types.h>
  20
  21 struct rtattr;
  22
  23 struct aead_instance {
  24         union {
  25                 struct {
  26                         char head[offsetof(struct aead_alg, base)];
  27                         struct crypto_instance base;
  28                 } s;
  29                 struct aead_alg alg;
  30         };
  31 };
  32
  33 struct crypto_aead_spawn {
  34         struct crypto_spawn base;
  35 };
  36
  37 extern const struct crypto_type crypto_aead_type;
  38 extern const struct crypto_type crypto_nivaead_type;
  39
  40 static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
  41 {
  42         return crypto_tfm_ctx(&tfm->base);
  43 }
  44
  45 static inline struct crypto_instance *crypto_aead_alg_instance(
  46         struct crypto_aead *aead)
  47 {
  48         return crypto_tfm_alg_instance(&aead->base);
  49 }
  50
  51 static inline struct crypto_instance *aead_crypto_instance(
  52         struct aead_instance *inst)
  53 {
  54         return container_of(&inst->alg.base, struct crypto_instance, alg);
  55 }
  56
  57 static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
  58 {
  59         return container_of(&inst->alg, struct aead_instance, alg.base);
  60 }
  61
  62 static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead)
  63 {
  64         return aead_instance(crypto_aead_alg_instance(aead));
  65 }
  66
  67 static inline void *aead_instance_ctx(struct aead_instance *inst)
  68 {
  69         return crypto_instance_ctx(aead_crypto_instance(inst));
  70 }
  71
  72 static inline void *aead_request_ctx(struct aead_request *req)
  73 {
  74         return req->__ctx;
  75 }
  76
  77 static inline void aead_request_complete(struct aead_request *req, int err)
  78 {
  79         req->base.complete(&req->base, err);
  80 }
  81
  82 static inline u32 aead_request_flags(struct aead_request *req)
  83 {
  84         return req->base.flags;
  85 }
  86
  87 static inline void crypto_set_aead_spawn(
  88         struct crypto_aead_spawn *spawn, struct crypto_instance *inst)
  89 {
  90         crypto_set_spawn(&spawn->base, inst);
  91 }
  92
  93 struct crypto_alg *crypto_lookup_aead(const char *name, u32 type, u32 mask);
  94
  95 int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
  96                      u32 type, u32 mask);
  97
  98 static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
  99 {
 100         crypto_drop_spawn(&spawn->base);
 101 }
 102
 103 static inline struct crypto_alg *crypto_aead_spawn_alg(
 104         struct crypto_aead_spawn *spawn)
 105 {
 106         return spawn->base.alg;
 107 }
 108
 109 static inline struct aead_alg *crypto_spawn_aead_alg(
 110         struct crypto_aead_spawn *spawn)
 111 {
 112         return container_of(spawn->base.alg, struct aead_alg, base);
 113 }
 114
 115 static inline struct crypto_aead *crypto_spawn_aead(
 116         struct crypto_aead_spawn *spawn)
 117 {
 118         return crypto_spawn_tfm2(&spawn->base);
 119 }
 120
 121 struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 122                                        struct rtattr **tb, u32 type, u32 mask);
 123 void aead_geniv_free(struct aead_instance *inst);
 124 int aead_geniv_init(struct crypto_tfm *tfm);
 125 void aead_geniv_exit(struct crypto_tfm *tfm);
 126
 127 static inline struct crypto_aead *aead_geniv_base(struct crypto_aead *geniv)
 128 {
 129         return geniv->child;
 130 }
 131
 132 static inline void *aead_givcrypt_reqctx(struct aead_givcrypt_request *req)
 133 {
 134         return aead_request_ctx(&req->areq);
 135 }
 136
 137 static inline void aead_givcrypt_complete(struct aead_givcrypt_request *req,
 138                                           int err)
 139 {
 140         aead_request_complete(&req->areq, err);
 141 }
 142
 143 static inline void crypto_aead_set_reqsize(struct crypto_aead *aead,
 144                                            unsigned int reqsize)
 145 {
 146         crypto_aead_crt(aead)->reqsize = reqsize;
 147 }
 148
 149 static inline unsigned int crypto_aead_alg_maxauthsize(struct aead_alg *alg)
 150 {
 151         return alg->base.cra_aead.encrypt ? alg->base.cra_aead.maxauthsize :
 152                                             alg->maxauthsize;
 153 }
 154
 155 static inline unsigned int crypto_aead_maxauthsize(struct crypto_aead *aead)
 156 {
 157         return crypto_aead_alg_maxauthsize(crypto_aead_alg(aead));
 158 }
 159
 160 int crypto_register_aead(struct aead_alg *alg);
 161 void crypto_unregister_aead(struct aead_alg *alg);
 162 int crypto_register_aeads(struct aead_alg *algs, int count);
 163 void crypto_unregister_aeads(struct aead_alg *algs, int count);
 164 int aead_register_instance(struct crypto_template *tmpl,
 165                            struct aead_instance *inst);
 166
 167 #endif  /* _CRYPTO_INTERNAL_AEAD_H */
 168