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/types.h>
  19
  20 struct rtattr;
  21
  22 struct aead_instance {
  23         struct aead_alg alg;
  24 };
  25
  26 struct crypto_aead_spawn {
  27         struct crypto_spawn base;
  28 };
  29
  30 extern const struct crypto_type crypto_aead_type;
  31 extern const struct crypto_type crypto_nivaead_type;
  32
  33 static inline struct old_aead_alg *crypto_old_aead_alg(struct crypto_aead *tfm)
  34 {
  35         return &crypto_aead_tfm(tfm)->__crt_alg->cra_aead;
  36 }
  37
  38 static inline struct aead_alg *crypto_aead_alg(struct crypto_aead *tfm)
  39 {
  40         return container_of(crypto_aead_tfm(tfm)->__crt_alg,
  41                             struct aead_alg, base);
  42 }
  43
  44 static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
  45 {
  46         return crypto_tfm_ctx(&tfm->base);
  47 }
  48
  49 static inline struct crypto_instance *crypto_aead_alg_instance(
  50         struct crypto_aead *aead)
  51 {
  52         return crypto_tfm_alg_instance(&aead->base);
  53 }
  54
  55 static inline struct crypto_instance *aead_crypto_instance(
  56         struct aead_instance *inst)
  57 {
  58         return container_of(&inst->alg.base, struct crypto_instance, alg);
  59 }
  60
  61 static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
  62 {
  63         return container_of(&inst->alg, struct aead_instance, alg.base);
  64 }
  65
  66 static inline void *aead_instance_ctx(struct aead_instance *inst)
  67 {
  68         return crypto_instance_ctx(aead_crypto_instance(inst));
  69 }
  70
  71 static inline void *aead_request_ctx(struct aead_request *req)
  72 {
  73         return req->__ctx;
  74 }
  75
  76 static inline void aead_request_complete(struct aead_request *req, int err)
  77 {
  78         req->base.complete(&req->base, err);
  79 }
  80
  81 static inline u32 aead_request_flags(struct aead_request *req)
  82 {
  83         return req->base.flags;
  84 }
  85
  86 static inline void crypto_set_aead_spawn(
  87         struct crypto_aead_spawn *spawn, struct crypto_instance *inst)
  88 {
  89         crypto_set_spawn(&spawn->base, inst);
  90 }
  91
  92 struct crypto_alg *crypto_lookup_aead(const char *name, u32 type, u32 mask);
  93
  94 int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
  95                      u32 type, u32 mask);
  96
  97 static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
  98 {
  99         crypto_drop_spawn(&spawn->base);
 100 }
 101
 102 static inline struct crypto_alg *crypto_aead_spawn_alg(
 103         struct crypto_aead_spawn *spawn)
 104 {
 105         return spawn->base.alg;
 106 }
 107
 108 static inline struct aead_alg *crypto_spawn_aead_alg(
 109         struct crypto_aead_spawn *spawn)
 110 {
 111         return container_of(spawn->base.alg, struct aead_alg, base);
 112 }
 113
 114 static inline struct crypto_aead *crypto_spawn_aead(
 115         struct crypto_aead_spawn *spawn)
 116 {
 117         return crypto_spawn_tfm2(&spawn->base);
 118 }
 119
 120 struct crypto_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 121                                          struct rtattr **tb, u32 type,
 122                                          u32 mask);
 123 void aead_geniv_free(struct crypto_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_maxauthsize(struct crypto_aead *aead)
 150 {
 151         return aead->maxauthsize;
 152 }
 153
 154 int crypto_register_aead(struct aead_alg *alg);
 155 int crypto_unregister_aead(struct aead_alg *alg);
 156 int aead_register_instance(struct crypto_template *tmpl,
 157                            struct aead_instance *inst);
 158
 159 #endif  /* _CRYPTO_INTERNAL_AEAD_H */
 160