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_cipher_ctxsize(struct crypto_alg *alg) 64 { 65 return alg->cra_ctxsize; 66 } 67 68 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 69 { 70 return alg->cra_ctxsize; 71 } 72 73 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 74 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask); 75 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 76 77 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 78 int crypto_init_compress_ops(struct crypto_tfm *tfm); 79 80 void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 81 void crypto_exit_compress_ops(struct crypto_tfm *tfm); 82 83 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 84 void crypto_larval_kill(struct crypto_alg *alg); 85 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask); 86 void crypto_alg_tested(const char *name, int err); 87 88 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 89 struct crypto_alg *nalg); 90 void crypto_remove_final(struct list_head *list); 91 void crypto_shoot_alg(struct crypto_alg *alg); 92 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 93 u32 mask); 94 void *crypto_create_tfm(struct crypto_alg *alg, 95 const struct crypto_type *frontend); 96 struct crypto_alg *crypto_find_alg(const char *alg_name, 97 const struct crypto_type *frontend, 98 u32 type, u32 mask); 99 void *crypto_alloc_tfm(const char *alg_name, 100 const struct crypto_type *frontend, u32 type, u32 mask); 101 102 int crypto_register_notifier(struct notifier_block *nb); 103 int crypto_unregister_notifier(struct notifier_block *nb); 104 int crypto_probing_notify(unsigned long val, void *v); 105 106 unsigned int crypto_alg_extsize(struct crypto_alg *alg); 107 108 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 109 { 110 atomic_inc(&alg->cra_refcnt); 111 return alg; 112 } 113 114 static inline void crypto_alg_put(struct crypto_alg *alg) 115 { 116 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 117 alg->cra_destroy(alg); 118 } 119 120 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 121 { 122 return try_module_get(tmpl->module); 123 } 124 125 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 126 { 127 module_put(tmpl->module); 128 } 129 130 static inline int crypto_is_larval(struct crypto_alg *alg) 131 { 132 return alg->cra_flags & CRYPTO_ALG_LARVAL; 133 } 134 135 static inline int crypto_is_dead(struct crypto_alg *alg) 136 { 137 return alg->cra_flags & CRYPTO_ALG_DEAD; 138 } 139 140 static inline int crypto_is_moribund(struct crypto_alg *alg) 141 { 142 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 143 } 144 145 static inline void crypto_notify(unsigned long val, void *v) 146 { 147 blocking_notifier_call_chain(&crypto_chain, val, v); 148 } 149 150 #endif /* _CRYPTO_INTERNAL_H */ 151 152