crypto/internal.h

   1 /*
   2  * Cryptographic API.
   3  *
   4  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   5  * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the Free
   9  * Software Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  */
  13 #ifndef _CRYPTO_INTERNAL_H
  14 #define _CRYPTO_INTERNAL_H
  15
  16 #include <crypto/algapi.h>
  17 #include <linux/completion.h>
  18 #include <linux/mm.h>
  19 #include <linux/highmem.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/init.h>
  22 #include <linux/list.h>
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/notifier.h>
  26 #include <linux/rwsem.h>
  27 #include <linux/slab.h>
  28 #include <linux/fips.h>
  29
  30 /* Crypto notification events. */
  31 enum {
  32         CRYPTO_MSG_ALG_REQUEST,
  33         CRYPTO_MSG_ALG_REGISTER,
  34         CRYPTO_MSG_ALG_UNREGISTER,
  35         CRYPTO_MSG_TMPL_REGISTER,
  36         CRYPTO_MSG_TMPL_UNREGISTER,
  37 };
  38
  39 struct crypto_instance;
  40 struct crypto_template;
  41
  42 struct crypto_larval {
  43         struct crypto_alg alg;
  44         struct crypto_alg *adult;
  45         struct completion completion;
  46         u32 mask;
  47 };
  48
  49 extern struct list_head crypto_alg_list;
  50 extern struct rw_semaphore crypto_alg_sem;
  51 extern struct blocking_notifier_head crypto_chain;
  52
  53 #ifdef CONFIG_PROC_FS
  54 void __init crypto_init_proc(void);
  55 void __exit crypto_exit_proc(void);
  56 #else
  57 static inline void crypto_init_proc(void)
  58 { }
  59 static inline void crypto_exit_proc(void)
  60 { }
  61 #endif
  62
  63 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)
  64 {
  65         unsigned int len = alg->cra_ctxsize;
  66
  67         if (alg->cra_alignmask) {
  68                 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
  69                 len += alg->cra_digest.dia_digestsize;
  70         }
  71
  72         return len;
  73 }
  74
  75 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  76 {
  77         return alg->cra_ctxsize;
  78 }
  79
  80 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  81 {
  82         return alg->cra_ctxsize;
  83 }
  84
  85 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  86 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
  87 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  88
  89 int crypto_init_digest_ops(struct crypto_tfm *tfm);
  90 int crypto_init_digest_ops_async(struct crypto_tfm *tfm);
  91 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  92 int crypto_init_compress_ops(struct crypto_tfm *tfm);
  93
  94 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
  95 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  96 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  97
  98 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  99 void crypto_larval_kill(struct crypto_alg *alg);
 100 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
 101 void crypto_larval_error(const char *name, u32 type, u32 mask);
 102 void crypto_alg_tested(const char *name, int err);
 103
 104 void crypto_shoot_alg(struct crypto_alg *alg);
 105 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
 106                                       u32 mask);
 107 void *crypto_create_tfm(struct crypto_alg *alg,
 108                         const struct crypto_type *frontend);
 109 struct crypto_alg *crypto_find_alg(const char *alg_name,
 110                                    const struct crypto_type *frontend,
 111                                    u32 type, u32 mask);
 112 void *crypto_alloc_tfm(const char *alg_name,
 113                        const struct crypto_type *frontend, u32 type, u32 mask);
 114
 115 int crypto_register_instance(struct crypto_template *tmpl,
 116                              struct crypto_instance *inst);
 117
 118 int crypto_register_notifier(struct notifier_block *nb);
 119 int crypto_unregister_notifier(struct notifier_block *nb);
 120 int crypto_probing_notify(unsigned long val, void *v);
 121
 122 static inline void crypto_alg_put(struct crypto_alg *alg)
 123 {
 124         if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 125                 alg->cra_destroy(alg);
 126 }
 127
 128 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 129 {
 130         return try_module_get(tmpl->module);
 131 }
 132
 133 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 134 {
 135         module_put(tmpl->module);
 136 }
 137
 138 static inline int crypto_is_larval(struct crypto_alg *alg)
 139 {
 140         return alg->cra_flags & CRYPTO_ALG_LARVAL;
 141 }
 142
 143 static inline int crypto_is_dead(struct crypto_alg *alg)
 144 {
 145         return alg->cra_flags & CRYPTO_ALG_DEAD;
 146 }
 147
 148 static inline int crypto_is_moribund(struct crypto_alg *alg)
 149 {
 150         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 151 }
 152
 153 static inline void crypto_notify(unsigned long val, void *v)
 154 {
 155         blocking_notifier_call_chain(&crypto_chain, val, v);
 156 }
 157
 158 #endif  /* _CRYPTO_INTERNAL_H */
 159