include/crypto/algapi.h

   1 /*
   2  * Cryptographic API for algorithms (i.e., low-level API).
   3  *
   4  * Copyright (c) 2006 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 #ifndef _CRYPTO_ALGAPI_H
  13 #define _CRYPTO_ALGAPI_H
  14
  15 #include <linux/crypto.h>
  16
  17 struct module;
  18 struct seq_file;
  19
  20 struct crypto_type {
  21         unsigned int (*ctxsize)(struct crypto_alg *alg);
  22         int (*init)(struct crypto_tfm *tfm);
  23         void (*exit)(struct crypto_tfm *tfm);
  24         void (*show)(struct seq_file *m, struct crypto_alg *alg);
  25 };
  26
  27 struct crypto_instance {
  28         struct crypto_alg alg;
  29
  30         struct crypto_template *tmpl;
  31         struct hlist_node list;
  32
  33         void *__ctx[] CRYPTO_MINALIGN_ATTR;
  34 };
  35
  36 struct crypto_template {
  37         struct list_head list;
  38         struct hlist_head instances;
  39         struct module *module;
  40
  41         struct crypto_instance *(*alloc)(void *param, unsigned int len);
  42         void (*free)(struct crypto_instance *inst);
  43
  44         char name[CRYPTO_MAX_ALG_NAME];
  45 };
  46
  47 struct crypto_spawn {
  48         struct list_head list;
  49         struct crypto_alg *alg;
  50         struct crypto_instance *inst;
  51 };
  52
  53 struct scatter_walk {
  54         struct scatterlist *sg;
  55         unsigned int offset;
  56 };
  57
  58 int crypto_register_template(struct crypto_template *tmpl);
  59 void crypto_unregister_template(struct crypto_template *tmpl);
  60 struct crypto_template *crypto_lookup_template(const char *name);
  61
  62 int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
  63                       struct crypto_instance *inst);
  64 void crypto_drop_spawn(struct crypto_spawn *spawn);
  65 struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn);
  66
  67 struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,
  68                                        u32 type, u32 mask);
  69 struct crypto_instance *crypto_alloc_instance(const char *name,
  70                                               struct crypto_alg *alg);
  71
  72 static inline void *crypto_instance_ctx(struct crypto_instance *inst)
  73 {
  74         return inst->__ctx;
  75 }
  76
  77 static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
  78 {
  79         return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
  80 }
  81
  82 #endif  /* _CRYPTO_ALGAPI_H */
  83