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. */ 31enum { 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 39struct crypto_instance; 40struct crypto_template; 41 42struct crypto_larval { 43 struct crypto_alg alg; 44 struct crypto_alg *adult; 45 struct completion completion; 46 u32 mask; 47}; 48 49extern struct list_head crypto_alg_list; 50extern struct rw_semaphore crypto_alg_sem; 51extern struct blocking_notifier_head crypto_chain; 52 53#ifdef CONFIG_PROC_FS 54void __init crypto_init_proc(void); 55void __exit crypto_exit_proc(void); 56#else 57static inline void crypto_init_proc(void) 58{ } 59static inline void crypto_exit_proc(void) 60{ } 61#endif 62 63static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 64{ 65 return alg->cra_ctxsize; 66} 67 68static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 69{ 70 return alg->cra_ctxsize; 71} 72 73struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 74struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask); 75struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 76 77int crypto_init_cipher_ops(struct crypto_tfm *tfm); 78int crypto_init_compress_ops(struct crypto_tfm *tfm); 79 80void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 81void crypto_exit_compress_ops(struct crypto_tfm *tfm); 82 83struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 84void crypto_larval_kill(struct crypto_alg *alg); 85struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask); 86void crypto_alg_tested(const char *name, int err); 87 88void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, 89 struct crypto_alg *nalg); 90void crypto_remove_final(struct list_head *list); 91void crypto_shoot_alg(struct crypto_alg *alg); 92struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 93 u32 mask); 94void *crypto_create_tfm(struct crypto_alg *alg, 95 const struct crypto_type *frontend); 96struct crypto_alg *crypto_find_alg(const char *alg_name, 97 const struct crypto_type *frontend, 98 u32 type, u32 mask); 99void *crypto_alloc_tfm(const char *alg_name, 100 const struct crypto_type *frontend, u32 type, u32 mask); 101 102int crypto_register_notifier(struct notifier_block *nb); 103int crypto_unregister_notifier(struct notifier_block *nb); 104int crypto_probing_notify(unsigned long val, void *v); 105 106static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) 107{ 108 atomic_inc(&alg->cra_refcnt); 109 return alg; 110} 111 112static inline void crypto_alg_put(struct crypto_alg *alg) 113{ 114 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 115 alg->cra_destroy(alg); 116} 117 118static inline int crypto_tmpl_get(struct crypto_template *tmpl) 119{ 120 return try_module_get(tmpl->module); 121} 122 123static inline void crypto_tmpl_put(struct crypto_template *tmpl) 124{ 125 module_put(tmpl->module); 126} 127 128static inline int crypto_is_larval(struct crypto_alg *alg) 129{ 130 return alg->cra_flags & CRYPTO_ALG_LARVAL; 131} 132 133static inline int crypto_is_dead(struct crypto_alg *alg) 134{ 135 return alg->cra_flags & CRYPTO_ALG_DEAD; 136} 137 138static inline int crypto_is_moribund(struct crypto_alg *alg) 139{ 140 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 141} 142 143static inline void crypto_notify(unsigned long val, void *v) 144{ 145 blocking_notifier_call_chain(&crypto_chain, val, v); 146} 147 148#endif /* _CRYPTO_INTERNAL_H */ 149 150