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         void (*free)(struct aead_instance *inst);
  25         union {
  26                 struct {
  27                         char head[offsetof(struct aead_alg, base)];
  28                         struct crypto_instance base;
  29                 } s;
  30                 struct aead_alg alg;
  31         };
  32 };
  33
  34 struct crypto_aead_spawn {
  35         struct crypto_spawn base;
  36 };
  37
  38 struct aead_queue {
  39         struct crypto_queue base;
  40 };
  41
  42 extern const struct crypto_type crypto_aead_type;
  43 extern const struct crypto_type crypto_nivaead_type;
  44
  45 static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
  46 {
  47         return crypto_tfm_ctx(&tfm->base);
  48 }
  49
  50 static inline struct crypto_instance *crypto_aead_alg_instance(
  51         struct crypto_aead *aead)
  52 {
  53         return crypto_tfm_alg_instance(&aead->base);
  54 }
  55
  56 static inline struct crypto_instance *aead_crypto_instance(
  57         struct aead_instance *inst)
  58 {
  59         return container_of(&inst->alg.base, struct crypto_instance, alg);
  60 }
  61
  62 static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
  63 {
  64         return container_of(&inst->alg, struct aead_instance, alg.base);
  65 }
  66
  67 static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead)
  68 {
  69         return aead_instance(crypto_aead_alg_instance(aead));
  70 }
  71
  72 static inline void *aead_instance_ctx(struct aead_instance *inst)
  73 {
  74         return crypto_instance_ctx(aead_crypto_instance(inst));
  75 }
  76
  77 static inline void *aead_request_ctx(struct aead_request *req)
  78 {
  79         return req->__ctx;
  80 }
  81
  82 static inline void aead_request_complete(struct aead_request *req, int err)
  83 {
  84         req->base.complete(&req->base, err);
  85 }
  86
  87 static inline u32 aead_request_flags(struct aead_request *req)
  88 {
  89         return req->base.flags;
  90 }
  91
  92 static inline void crypto_set_aead_spawn(
  93         struct crypto_aead_spawn *spawn, struct crypto_instance *inst)
  94 {
  95         crypto_set_spawn(&spawn->base, inst);
  96 }
  97
  98 struct crypto_alg *crypto_lookup_aead(const char *name, u32 type, u32 mask);
  99
 100 int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
 101                      u32 type, u32 mask);
 102
 103 static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
 104 {
 105         crypto_drop_spawn(&spawn->base);
 106 }
 107
 108 static inline struct crypto_alg *crypto_aead_spawn_alg(
 109         struct crypto_aead_spawn *spawn)
 110 {
 111         return spawn->base.alg;
 112 }
 113
 114 static inline struct aead_alg *crypto_spawn_aead_alg(
 115         struct crypto_aead_spawn *spawn)
 116 {
 117         return container_of(spawn->base.alg, struct aead_alg, base);
 118 }
 119
 120 static inline struct crypto_aead *crypto_spawn_aead(
 121         struct crypto_aead_spawn *spawn)
 122 {
 123         return crypto_spawn_tfm2(&spawn->base);
 124 }
 125
 126 static inline struct crypto_aead *aead_geniv_base(struct crypto_aead *geniv)
 127 {
 128         return geniv->child;
 129 }
 130
 131 static inline void *aead_givcrypt_reqctx(struct aead_givcrypt_request *req)
 132 {
 133         return aead_request_ctx(&req->areq);
 134 }
 135
 136 static inline void aead_givcrypt_complete(struct aead_givcrypt_request *req,
 137                                           int err)
 138 {
 139         aead_request_complete(&req->areq, err);
 140 }
 141
 142 static inline void crypto_aead_set_reqsize(struct crypto_aead *aead,
 143                                            unsigned int reqsize)
 144 {
 145         crypto_aead_crt(aead)->reqsize = reqsize;
 146 }
 147
 148 static inline unsigned int crypto_aead_alg_maxauthsize(struct aead_alg *alg)
 149 {
 150         return alg->base.cra_aead.encrypt ? alg->base.cra_aead.maxauthsize :
 151                                             alg->maxauthsize;
 152 }
 153
 154 static inline unsigned int crypto_aead_maxauthsize(struct crypto_aead *aead)
 155 {
 156         return crypto_aead_alg_maxauthsize(crypto_aead_alg(aead));
 157 }
 158
 159 static inline void aead_init_queue(struct aead_queue *queue,
 160                                    unsigned int max_qlen)
 161 {
 162         crypto_init_queue(&queue->base, max_qlen);
 163 }
 164
 165 static inline int aead_enqueue_request(struct aead_queue *queue,
 166                                        struct aead_request *request)
 167 {
 168         return crypto_enqueue_request(&queue->base, &request->base);
 169 }
 170
 171 static inline struct aead_request *aead_dequeue_request(
 172         struct aead_queue *queue)
 173 {
 174         struct crypto_async_request *req;
 175
 176         req = crypto_dequeue_request(&queue->base);
 177
 178         return req ? container_of(req, struct aead_request, base) : NULL;
 179 }
 180
 181 static inline struct aead_request *aead_get_backlog(struct aead_queue *queue)
 182 {
 183         struct crypto_async_request *req;
 184
 185         req = crypto_get_backlog(&queue->base);
 186
 187         return req ? container_of(req, struct aead_request, base) : NULL;
 188 }
 189
 190 int crypto_register_aead(struct aead_alg *alg);
 191 void crypto_unregister_aead(struct aead_alg *alg);
 192 int crypto_register_aeads(struct aead_alg *algs, int count);
 193 void crypto_unregister_aeads(struct aead_alg *algs, int count);
 194 int aead_register_instance(struct crypto_template *tmpl,
 195                            struct aead_instance *inst);
 196
 197 #endif  /* _CRYPTO_INTERNAL_AEAD_H */
 198