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 29 /* Crypto notification events. */ 30 enum { 31 CRYPTO_MSG_ALG_REQUEST, 32 CRYPTO_MSG_ALG_REGISTER, 33 }; 34 35 struct crypto_instance; 36 struct crypto_template; 37 38 struct crypto_larval { 39 struct crypto_alg alg; 40 struct crypto_alg *adult; 41 struct completion completion; 42 u32 mask; 43 }; 44 45 extern struct list_head crypto_alg_list; 46 extern struct rw_semaphore crypto_alg_sem; 47 extern struct blocking_notifier_head crypto_chain; 48 49 #ifdef CONFIG_PROC_FS 50 void __init crypto_init_proc(void); 51 void __exit crypto_exit_proc(void); 52 #else 53 static inline void crypto_init_proc(void) 54 { } 55 static inline void crypto_exit_proc(void) 56 { } 57 #endif 58 59 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 60 { 61 return alg->cra_ctxsize; 62 } 63 64 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 65 { 66 return alg->cra_ctxsize; 67 } 68 69 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 70 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 71 72 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 73 int crypto_init_compress_ops(struct crypto_tfm *tfm); 74 75 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 76 void crypto_larval_kill(struct crypto_alg *alg); 77 void crypto_alg_tested(const char *name, int err); 78 79 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 80 struct crypto_alg *nalg); 81 void crypto_remove_final(struct list_head *list); 82 void crypto_shoot_alg(struct crypto_alg *alg); 83 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 84 u32 mask); 85 void *crypto_create_tfm(struct crypto_alg *alg, 86 const struct crypto_type *frontend); 87 struct crypto_alg *crypto_find_alg(const char *alg_name, 88 const struct crypto_type *frontend, 89 u32 type, u32 mask); 90 void *crypto_alloc_tfm(const char *alg_name, 91 const struct crypto_type *frontend, u32 type, u32 mask); 92 93 int crypto_register_notifier(struct notifier_block *nb); 94 int crypto_unregister_notifier(struct notifier_block *nb); 95 int crypto_probing_notify(unsigned long val, void *v); 96 97 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 98 99 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 100 u32 type, u32 mask); 101 102 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 103 { 104 refcount_inc(&alg->cra_refcnt); 105 return alg; 106 } 107 108 static inline void crypto_alg_put(struct crypto_alg *alg) 109 { 110 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 111 alg->cra_destroy(alg); 112 } 113 114 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 115 { 116 return try_module_get(tmpl->module); 117 } 118 119 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 120 { 121 module_put(tmpl->module); 122 } 123 124 static inline int crypto_is_larval(struct crypto_alg *alg) 125 { 126 return alg->cra_flags & CRYPTO_ALG_LARVAL; 127 } 128 129 static inline int crypto_is_dead(struct crypto_alg *alg) 130 { 131 return alg->cra_flags & CRYPTO_ALG_DEAD; 132 } 133 134 static inline int crypto_is_moribund(struct crypto_alg *alg) 135 { 136 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 137 } 138 139 static inline void crypto_notify(unsigned long val, void *v) 140 { 141 blocking_notifier_call_chain(&crypto_chain, val, v); 142 } 143 144 #endif /* _CRYPTO_INTERNAL_H */ 145 146