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