LXR linux/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
  20struct rtattr;
  21
  22struct 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
  33struct crypto_skcipher_spawn {
  34        struct crypto_spawn base;
  35};
  36
  37extern const struct crypto_type crypto_givcipher_type;
  38
  39static inline struct crypto_instance *skcipher_crypto_instance(
  40        struct skcipher_instance *inst)
  41{
  42        return &inst->s.base;
  43}
  44
  45static 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
  52static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
  53{
  54        return crypto_instance_ctx(skcipher_crypto_instance(inst));
  55}
  56
  57static inline void skcipher_request_complete(struct skcipher_request *req, int err)
  58{
  59        req->base.complete(&req->base, err);
  60}
  61
  62static 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
  68int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
  69                         u32 type, u32 mask);
  70
  71static 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
  77struct crypto_alg *crypto_lookup_skcipher(const char *name, u32 type, u32 mask);
  78
  79static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
  80{
  81        crypto_drop_spawn(&spawn->base);
  82}
  83
  84static 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
  90static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
  91        struct crypto_skcipher_spawn *spawn)
  92{
  93        return crypto_skcipher_spawn_alg(spawn);
  94}
  95
  96static inline struct crypto_skcipher *crypto_spawn_skcipher(
  97        struct crypto_skcipher_spawn *spawn)
  98{
  99        return crypto_spawn_tfm2(&spawn->base);
 100}
 101
 102static inline struct crypto_skcipher *crypto_spawn_skcipher2(
 103        struct crypto_skcipher_spawn *spawn)
 104{
 105        return crypto_spawn_skcipher(spawn);
 106}
 107
 108static inline void crypto_skcipher_set_reqsize(
 109        struct crypto_skcipher *skcipher, unsigned int reqsize)
 110{
 111        skcipher->reqsize = reqsize;
 112}
 113
 114int crypto_register_skcipher(struct skcipher_alg *alg);
 115void crypto_unregister_skcipher(struct skcipher_alg *alg);
 116int crypto_register_skciphers(struct skcipher_alg *algs, int count);
 117void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
 118int skcipher_register_instance(struct crypto_template *tmpl,
 119                               struct skcipher_instance *inst);
 120
 121static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
 122                                               int err)
 123{
 124        req->base.complete(&req->base, err);
 125}
 126
 127static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
 128{
 129        return req->base.flags;
 130}
 131
 132static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
 133{
 134        return crypto_tfm_ctx(&tfm->base);
 135}
 136
 137static inline void *skcipher_request_ctx(struct skcipher_request *req)
 138{
 139        return req->__ctx;
 140}
 141
 142static inline u32 skcipher_request_flags(struct skcipher_request *req)
 143{
 144        return req->base.flags;
 145}
 146
 147static 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
 160static 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
 175