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 CRYPTO_MSG_ALG_UNREGISTER, 34 CRYPTO_MSG_TMPL_REGISTER, 35 CRYPTO_MSG_TMPL_UNREGISTER, 36 }; 37 38 struct crypto_instance; 39 struct crypto_template; 40 41 struct crypto_larval { 42 struct crypto_alg alg; 43 struct crypto_alg *adult; 44 struct completion completion; 45 u32 mask; 46 }; 47 48 extern struct list_head crypto_alg_list; 49 extern struct rw_semaphore crypto_alg_sem; 50 extern struct blocking_notifier_head crypto_chain; 51 52 #ifdef CONFIG_PROC_FS 53 void __init crypto_init_proc(void); 54 void __exit crypto_exit_proc(void); 55 #else 56 static inline void crypto_init_proc(void) 57 { } 58 static inline void crypto_exit_proc(void) 59 { } 60 #endif 61 62 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 63 { 64 return alg->cra_ctxsize; 65 } 66 67 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 68 { 69 return alg->cra_ctxsize; 70 } 71 72 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 73 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask); 74 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 75 76 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 77 int crypto_init_compress_ops(struct crypto_tfm *tfm); 78 79 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 80 void crypto_larval_kill(struct crypto_alg *alg); 81 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask); 82 void crypto_alg_tested(const char *name, int err); 83 84 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 85 struct crypto_alg *nalg); 86 void crypto_remove_final(struct list_head *list); 87 void crypto_shoot_alg(struct crypto_alg *alg); 88 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 89 u32 mask); 90 void *crypto_create_tfm(struct crypto_alg *alg, 91 const struct crypto_type *frontend); 92 struct crypto_alg *crypto_find_alg(const char *alg_name, 93 const struct crypto_type *frontend, 94 u32 type, u32 mask); 95 void *crypto_alloc_tfm(const char *alg_name, 96 const struct crypto_type *frontend, u32 type, u32 mask); 97 98 int crypto_register_notifier(struct notifier_block *nb); 99 int crypto_unregister_notifier(struct notifier_block *nb); 100 int crypto_probing_notify(unsigned long val, void *v); 101 102 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 103 104 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, 105 u32 type, u32 mask); 106 107 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 108 { 109 atomic_inc(&alg->cra_refcnt); 110 return alg; 111 } 112 113 static inline void crypto_alg_put(struct crypto_alg *alg) 114 { 115 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 116 alg->cra_destroy(alg); 117 } 118 119 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 120 { 121 return try_module_get(tmpl->module); 122 } 123 124 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 125 { 126 module_put(tmpl->module); 127 } 128 129 static inline int crypto_is_larval(struct crypto_alg *alg) 130 { 131 return alg->cra_flags & CRYPTO_ALG_LARVAL; 132 } 133 134 static inline int crypto_is_dead(struct crypto_alg *alg) 135 { 136 return alg->cra_flags & CRYPTO_ALG_DEAD; 137 } 138 139 static inline int crypto_is_moribund(struct crypto_alg *alg) 140 { 141 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 142 } 143 144 static inline void crypto_notify(unsigned long val, void *v) 145 { 146 blocking_notifier_call_chain(&crypto_chain, val, v); 147 } 148 149 #endif /* _CRYPTO_INTERNAL_H */ 150 151