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 int crypto_grab_skcipher2(struct crypto_skcipher_spawn *spawn,
  72                                         const char *name, u32 type, u32 mask)
  73 {
  74         return crypto_grab_skcipher(spawn, name, type, mask);
  75 }
  76
  77 struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type, u32 mask);
  78
  79 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
  80 {
  81         crypto_drop_spawn(&spawn->base);
  82 }
  83
  84 static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
  85         struct crypto_skcipher_spawn *spawn)
  86 {
  87         return container_of(spawn->base.alg, struct skcipher_alg, base);
  88 }
  89
  90 static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
  91         struct crypto_skcipher_spawn *spawn)
  92 {
  93         return crypto_skcipher_spawn_alg(spawn);
  94 }
  95
  96 static inline struct crypto_skcipher *crypto_spawn_skcipher(
  97         struct crypto_skcipher_spawn *spawn)
  98 {
  99         return crypto_spawn_tfm2(&spawn->base);
 100 }
 101
 102 static inline struct crypto_skcipher *crypto_spawn_skcipher2(
 103         struct crypto_skcipher_spawn *spawn)
 104 {
 105         return crypto_spawn_skcipher(spawn);
 106 }
 107
 108 static inline void crypto_skcipher_set_reqsize(
 109         struct crypto_skcipher *skcipher, unsigned int reqsize)
 110 {
 111         skcipher->reqsize = reqsize;
 112 }
 113
 114 int crypto_register_skcipher(struct skcipher_alg *alg);
 115 void crypto_unregister_skcipher(struct skcipher_alg *alg);
 116 int crypto_register_skciphers(struct skcipher_alg *algs, int count);
 117 void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
 118 int skcipher_register_instance(struct crypto_template *tmpl,
 119                                struct skcipher_instance *inst);
 120
 121 static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
 122                                                int err)
 123 {
 124         req->base.complete(&req->base, err);
 125 }
 126
 127 static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
 128 {
 129         return req->base.flags;
 130 }
 131
 132 static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
 133 {
 134         return crypto_tfm_ctx(&tfm->base);
 135 }
 136
 137 static inline void *skcipher_request_ctx(struct skcipher_request *req)
 138 {
 139         return req->__ctx;
 140 }
 141
 142 static inline u32 skcipher_request_flags(struct skcipher_request *req)
 143 {
 144         return req->base.flags;
 145 }
 146
 147 static inline unsigned int crypto_skcipher_alg_min_keysize(
 148         struct skcipher_alg *alg)
 149 {
 150         if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
 151             CRYPTO_ALG_TYPE_BLKCIPHER)
 152                 return alg->base.cra_blkcipher.min_keysize;
 153
 154         if (alg->base.cra_ablkcipher.encrypt)
 155                 return alg->base.cra_ablkcipher.min_keysize;
 156
 157         return alg->min_keysize;
 158 }
 159
 160 static inline unsigned int crypto_skcipher_alg_max_keysize(
 161         struct skcipher_alg *alg)
 162 {
 163         if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
 164             CRYPTO_ALG_TYPE_BLKCIPHER)
 165                 return alg->base.cra_blkcipher.max_keysize;
 166
 167         if (alg->base.cra_ablkcipher.encrypt)
 168                 return alg->base.cra_ablkcipher.max_keysize;
 169
 170         return alg->max_keysize;
 171 }
 172
 173 #endif  /* _CRYPTO_INTERNAL_SKCIPHER_H */
 174