include/crypto/internal/skcipher.h

   1 /*
   2  * Symmetric key ciphers.
   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_SKCIPHER_H
  14 #define _CRYPTO_INTERNAL_SKCIPHER_H
  15
  16 #include <crypto/algapi.h>
  17 #include <crypto/skcipher.h>
  18 #include <linux/types.h>
  19
  20 struct rtattr;
  21
  22 struct skcipher_instance {
  23         void (*free)(struct skcipher_instance *inst);
  24         union {
  25                 struct {
  26                         char head[offsetof(struct skcipher_alg, base)];
  27                         struct crypto_instance base;
  28                 } s;
  29                 struct skcipher_alg alg;
  30         };
  31 };
  32
  33 struct crypto_skcipher_spawn {
  34         struct crypto_spawn base;
  35 };
  36
  37 extern const struct crypto_type crypto_givcipher_type;
  38
  39 static inline struct crypto_instance *skcipher_crypto_instance(
  40         struct skcipher_instance *inst)
  41 {
  42         return &inst->s.base;
  43 }
  44
  45 static inline struct skcipher_instance *skcipher_alg_instance(
  46         struct crypto_skcipher *skcipher)
  47 {
  48         return container_of(crypto_skcipher_alg(skcipher),
  49                             struct skcipher_instance, alg);
  50 }
  51
  52 static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
  53 {
  54         return crypto_instance_ctx(skcipher_crypto_instance(inst));
  55 }
  56
  57 static inline void skcipher_request_complete(struct skcipher_request *req, int err)
  58 {
  59         req->base.complete(&req->base, err);
  60 }
  61
  62 static inline void crypto_set_skcipher_spawn(
  63         struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
  64 {
  65         crypto_set_spawn(&spawn->base, inst);
  66 }
  67
  68 int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
  69                          u32 type, u32 mask);
  70
  71 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
  72 {
  73         crypto_drop_spawn(&spawn->base);
  74 }
  75
  76 static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
  77         struct crypto_skcipher_spawn *spawn)
  78 {
  79         return container_of(spawn->base.alg, struct skcipher_alg, base);
  80 }
  81
  82 static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
  83         struct crypto_skcipher_spawn *spawn)
  84 {
  85         return crypto_skcipher_spawn_alg(spawn);
  86 }
  87
  88 static inline struct crypto_skcipher *crypto_spawn_skcipher(
  89         struct crypto_skcipher_spawn *spawn)
  90 {
  91         return crypto_spawn_tfm2(&spawn->base);
  92 }
  93
  94 static inline void crypto_skcipher_set_reqsize(
  95         struct crypto_skcipher *skcipher, unsigned int reqsize)
  96 {
  97         skcipher->reqsize = reqsize;
  98 }
  99
 100 int crypto_register_skcipher(struct skcipher_alg *alg);
 101 void crypto_unregister_skcipher(struct skcipher_alg *alg);
 102 int crypto_register_skciphers(struct skcipher_alg *algs, int count);
 103 void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
 104 int skcipher_register_instance(struct crypto_template *tmpl,
 105                                struct skcipher_instance *inst);
 106
 107 static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
 108                                                int err)
 109 {
 110         req->base.complete(&req->base, err);
 111 }
 112
 113 static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
 114 {
 115         return req->base.flags;
 116 }
 117
 118 static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
 119 {
 120         return crypto_tfm_ctx(&tfm->base);
 121 }
 122
 123 static inline void *skcipher_request_ctx(struct skcipher_request *req)
 124 {
 125         return req->__ctx;
 126 }
 127
 128 static inline u32 skcipher_request_flags(struct skcipher_request *req)
 129 {
 130         return req->base.flags;
 131 }
 132
 133 static inline unsigned int crypto_skcipher_alg_min_keysize(
 134         struct skcipher_alg *alg)
 135 {
 136         if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
 137             CRYPTO_ALG_TYPE_BLKCIPHER)
 138                 return alg->base.cra_blkcipher.min_keysize;
 139
 140         if (alg->base.cra_ablkcipher.encrypt)
 141                 return alg->base.cra_ablkcipher.min_keysize;
 142
 143         return alg->min_keysize;
 144 }
 145
 146 static inline unsigned int crypto_skcipher_alg_max_keysize(
 147         struct skcipher_alg *alg)
 148 {
 149         if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
 150             CRYPTO_ALG_TYPE_BLKCIPHER)
 151                 return alg->base.cra_blkcipher.max_keysize;
 152
 153         if (alg->base.cra_ablkcipher.encrypt)
 154                 return alg->base.cra_ablkcipher.max_keysize;
 155
 156         return alg->max_keysize;
 157 }
 158
 159 #endif  /* _CRYPTO_INTERNAL_SKCIPHER_H */
 160