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 #ifdef CONFIG_CRYPTO_FIPS 30 extern int fips_enabled; 31 #else 32 #define fips_enabled 0 33 #endif 34 35 /* Crypto notification events. */ 36 enum { 37 CRYPTO_MSG_ALG_REQUEST, 38 CRYPTO_MSG_ALG_REGISTER, 39 CRYPTO_MSG_ALG_UNREGISTER, 40 CRYPTO_MSG_TMPL_REGISTER, 41 CRYPTO_MSG_TMPL_UNREGISTER, 42 }; 43 44 struct crypto_instance; 45 struct crypto_template; 46 47 struct crypto_larval { 48 struct crypto_alg alg; 49 struct crypto_alg *adult; 50 struct completion completion; 51 u32 mask; 52 }; 53 54 extern struct list_head crypto_alg_list; 55 extern struct rw_semaphore crypto_alg_sem; 56 extern struct blocking_notifier_head crypto_chain; 57 58 #ifdef CONFIG_PROC_FS 59 void __init crypto_init_proc(void); 60 void __exit crypto_exit_proc(void); 61 #else 62 static inline void crypto_init_proc(void) 63 { } 64 static inline void crypto_exit_proc(void) 65 { } 66 #endif 67 68 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg) 69 { 70 unsigned int len = alg->cra_ctxsize; 71 72 if (alg->cra_alignmask) { 73 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); 74 len += alg->cra_digest.dia_digestsize; 75 } 76 77 return len; 78 } 79 80 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 81 { 82 return alg->cra_ctxsize; 83 } 84 85 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 86 { 87 return alg->cra_ctxsize; 88 } 89 90 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 91 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask); 92 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 93 94 int crypto_init_digest_ops(struct crypto_tfm *tfm); 95 int crypto_init_digest_ops_async(struct crypto_tfm *tfm); 96 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 97 int crypto_init_compress_ops(struct crypto_tfm *tfm); 98 99 void crypto_exit_digest_ops(struct crypto_tfm *tfm); 100 void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 101 void crypto_exit_compress_ops(struct crypto_tfm *tfm); 102 103 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); 104 void crypto_larval_kill(struct crypto_alg *alg); 105 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask); 106 void crypto_larval_error(const char *name, u32 type, u32 mask); 107 void crypto_alg_tested(const char *name, int err); 108 109 void crypto_shoot_alg(struct crypto_alg *alg); 110 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 111 u32 mask); 112 113 int crypto_register_instance(struct crypto_template *tmpl, 114 struct crypto_instance *inst); 115 116 int crypto_register_notifier(struct notifier_block *nb); 117 int crypto_unregister_notifier(struct notifier_block *nb); 118 int crypto_probing_notify(unsigned long val, void *v); 119 120 int __init testmgr_init(void); 121 void testmgr_exit(void); 122 123 static inline void crypto_alg_put(struct crypto_alg *alg) 124 { 125 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 126 alg->cra_destroy(alg); 127 } 128 129 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 130 { 131 return try_module_get(tmpl->module); 132 } 133 134 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 135 { 136 module_put(tmpl->module); 137 } 138 139 static inline int crypto_is_larval(struct crypto_alg *alg) 140 { 141 return alg->cra_flags & CRYPTO_ALG_LARVAL; 142 } 143 144 static inline int crypto_is_dead(struct crypto_alg *alg) 145 { 146 return alg->cra_flags & CRYPTO_ALG_DEAD; 147 } 148 149 static inline int crypto_is_moribund(struct crypto_alg *alg) 150 { 151 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 152 } 153 154 static inline void crypto_notify(unsigned long val, void *v) 155 { 156 blocking_notifier_call_chain(&crypto_chain, val, v); 157 } 158 159 #endif /* _CRYPTO_INTERNAL_H */ 160 161