LXR linux/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
  21struct rtattr;
  22
  23struct 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
  33struct crypto_aead_spawn {
  34        struct crypto_spawn base;
  35};
  36
  37extern const struct crypto_type crypto_aead_type;
  38extern const struct crypto_type crypto_nivaead_type;
  39
  40static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
  41{
  42        return crypto_tfm_ctx(&tfm->base);
  43}
  44
  45static inline struct crypto_instance *crypto_aead_alg_instance(
  46        struct crypto_aead *aead)
  47{
  48        return crypto_tfm_alg_instance(&aead->base);
  49}
  50
  51static 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
  57static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
  58{
  59        return container_of(&inst->alg, struct aead_instance, alg.base);
  60}
  61
  62static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead)
  63{
  64        return aead_instance(crypto_aead_alg_instance(aead));
  65}
  66
  67static inline void *aead_instance_ctx(struct aead_instance *inst)
  68{
  69        return crypto_instance_ctx(aead_crypto_instance(inst));
  70}
  71
  72static inline void *aead_request_ctx(struct aead_request *req)
  73{
  74        return req->__ctx;
  75}
  76
  77static inline void aead_request_complete(struct aead_request *req, int err)
  78{
  79        req->base.complete(&req->base, err);
  80}
  81
  82static inline u32 aead_request_flags(struct aead_request *req)
  83{
  84        return req->base.flags;
  85}
  86
  87static 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
  93struct crypto_alg *crypto_lookup_aead(const char *name, u32 type, u32 mask);
  94
  95int crypto_grab_aead(struct crypto_aead_spawn *spawn, const char *name,
  96                     u32 type, u32 mask);
  97
  98static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
  99{
 100        crypto_drop_spawn(&spawn->base);
 101}
 102
 103static inline struct crypto_alg *crypto_aead_spawn_alg(
 104        struct crypto_aead_spawn *spawn)
 105{
 106        return spawn->base.alg;
 107}
 108
 109static 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
 115static inline struct crypto_aead *crypto_spawn_aead(
 116        struct crypto_aead_spawn *spawn)
 117{
 118        return crypto_spawn_tfm2(&spawn->base);
 119}
 120
 121struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl,
 122                                       struct rtattr **tb, u32 type, u32 mask);
 123void aead_geniv_free(struct aead_instance *inst);
 124int aead_geniv_init(struct crypto_tfm *tfm);
 125void aead_geniv_exit(struct crypto_tfm *tfm);
 126
 127static inline struct crypto_aead *aead_geniv_base(struct crypto_aead *geniv)
 128{
 129        return geniv->child;
 130}
 131
 132static inline void *aead_givcrypt_reqctx(struct aead_givcrypt_request *req)
 133{
 134        return aead_request_ctx(&req->areq);
 135}
 136
 137static inline void aead_givcrypt_complete(struct aead_givcrypt_request *req,
 138                                          int err)
 139{
 140        aead_request_complete(&req->areq, err);
 141}
 142
 143static inline void crypto_aead_set_reqsize(struct crypto_aead *aead,
 144                                           unsigned int reqsize)
 145{
 146        crypto_aead_crt(aead)->reqsize = reqsize;
 147}
 148
 149static 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
 155static inline unsigned int crypto_aead_maxauthsize(struct crypto_aead *aead)
 156{
 157        return crypto_aead_alg_maxauthsize(crypto_aead_alg(aead));
 158}
 159
 160int crypto_register_aead(struct aead_alg *alg);
 161void crypto_unregister_aead(struct aead_alg *alg);
 162int crypto_register_aeads(struct aead_alg *algs, int count);
 163void crypto_unregister_aeads(struct aead_alg *algs, int count);
 164int aead_register_instance(struct crypto_template *tmpl,
 165                           struct aead_instance *inst);
 166
 167#endif  /* _CRYPTO_INTERNAL_AEAD_H */
 168
 169