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 int crypto_grab_skcipher2(struct crypto_skcipher_spawn *spawn,
  71                           const char *name, u32 type, u32 mask);
  72
  73 struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type, u32 mask);
  74
  75 static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
  76 {
  77         crypto_drop_spawn(&spawn->base);
  78 }
  79
  80 static inline struct crypto_alg *crypto_skcipher_spawn_alg(
  81         struct crypto_skcipher_spawn *spawn)
  82 {
  83         return spawn->base.alg;
  84 }
  85
  86 static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
  87         struct crypto_skcipher_spawn *spawn)
  88 {
  89         return container_of(spawn->base.alg, struct skcipher_alg, base);
  90 }
  91
  92 static inline struct crypto_ablkcipher *crypto_spawn_skcipher(
  93         struct crypto_skcipher_spawn *spawn)
  94 {
  95         return __crypto_ablkcipher_cast(
  96                 crypto_spawn_tfm(&spawn->base, crypto_skcipher_type(0),
  97                                  crypto_skcipher_mask(0)));
  98 }
  99
 100 static inline struct crypto_skcipher *crypto_spawn_skcipher2(
 101         struct crypto_skcipher_spawn *spawn)
 102 {
 103         return crypto_spawn_tfm2(&spawn->base);
 104 }
 105
 106 static inline void crypto_skcipher_set_reqsize(
 107         struct crypto_skcipher *skcipher, unsigned int reqsize)
 108 {
 109         skcipher->reqsize = reqsize;
 110 }
 111
 112 int crypto_register_skcipher(struct skcipher_alg *alg);
 113 void crypto_unregister_skcipher(struct skcipher_alg *alg);
 114 int crypto_register_skciphers(struct skcipher_alg *algs, int count);
 115 void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
 116 int skcipher_register_instance(struct crypto_template *tmpl,
 117                                struct skcipher_instance *inst);
 118
 119 int skcipher_null_givencrypt(struct skcipher_givcrypt_request *req);
 120 int skcipher_null_givdecrypt(struct skcipher_givcrypt_request *req);
 121 const char *crypto_default_geniv(const struct crypto_alg *alg);
 122
 123 struct crypto_instance *skcipher_geniv_alloc(struct crypto_template *tmpl,
 124                                              struct rtattr **tb, u32 type,
 125                                              u32 mask);
 126 void skcipher_geniv_free(struct crypto_instance *inst);
 127 int skcipher_geniv_init(struct crypto_tfm *tfm);
 128 void skcipher_geniv_exit(struct crypto_tfm *tfm);
 129
 130 static inline struct crypto_ablkcipher *skcipher_geniv_cipher(
 131         struct crypto_ablkcipher *geniv)
 132 {
 133         return crypto_ablkcipher_crt(geniv)->base;
 134 }
 135
 136 static inline int skcipher_enqueue_givcrypt(
 137         struct crypto_queue *queue, struct skcipher_givcrypt_request *request)
 138 {
 139         return ablkcipher_enqueue_request(queue, &request->creq);
 140 }
 141
 142 static inline struct skcipher_givcrypt_request *skcipher_dequeue_givcrypt(
 143         struct crypto_queue *queue)
 144 {
 145         return skcipher_givcrypt_cast(crypto_dequeue_request(queue));
 146 }
 147
 148 static inline void *skcipher_givcrypt_reqctx(
 149         struct skcipher_givcrypt_request *req)
 150 {
 151         return ablkcipher_request_ctx(&req->creq);
 152 }
 153
 154 static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
 155                                                int err)
 156 {
 157         req->base.complete(&req->base, err);
 158 }
 159
 160 static inline void skcipher_givcrypt_complete(
 161         struct skcipher_givcrypt_request *req, int err)
 162 {
 163         ablkcipher_request_complete(&req->creq, err);
 164 }
 165
 166 static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
 167 {
 168         return req->base.flags;
 169 }
 170
 171 static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
 172 {
 173         return crypto_tfm_ctx(&tfm->base);
 174 }
 175
 176 static inline void *skcipher_request_ctx(struct skcipher_request *req)
 177 {
 178         return req->__ctx;
 179 }
 180
 181 static inline u32 skcipher_request_flags(struct skcipher_request *req)
 182 {
 183         return req->base.flags;
 184 }
 185
 186 static inline unsigned int crypto_skcipher_alg_min_keysize(
 187         struct skcipher_alg *alg)
 188 {
 189         if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
 190             CRYPTO_ALG_TYPE_BLKCIPHER)
 191                 return alg->base.cra_blkcipher.min_keysize;
 192
 193         if (alg->base.cra_ablkcipher.encrypt)
 194                 return alg->base.cra_ablkcipher.min_keysize;
 195
 196         return alg->min_keysize;
 197 }
 198
 199 static inline unsigned int crypto_skcipher_alg_max_keysize(
 200         struct skcipher_alg *alg)
 201 {
 202         if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) ==
 203             CRYPTO_ALG_TYPE_BLKCIPHER)
 204                 return alg->base.cra_blkcipher.max_keysize;
 205
 206         if (alg->base.cra_ablkcipher.encrypt)
 207                 return alg->base.cra_ablkcipher.max_keysize;
 208
 209         return alg->max_keysize;
 210 }
 211
 212 #endif  /* _CRYPTO_INTERNAL_SKCIPHER_H */
 213