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_digest_ctxsize(struct crypto_alg *alg) 63 { 64 unsigned int len = alg->cra_ctxsize; 65 66 if (alg->cra_alignmask) { 67 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); 68 len += alg->cra_digest.dia_digestsize; 69 } 70 71 return len; 72 } 73 74 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) 75 { 76 return alg->cra_ctxsize; 77 } 78 79 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) 80 { 81 return alg->cra_ctxsize; 82 } 83 84 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 85 struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask); 86 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 87 88 int crypto_init_digest_ops(struct crypto_tfm *tfm); 89 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 90 int crypto_init_compress_ops(struct crypto_tfm *tfm); 91 92 void crypto_exit_digest_ops(struct crypto_tfm *tfm); 93 void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 94 void crypto_exit_compress_ops(struct crypto_tfm *tfm); 95 96 void crypto_larval_kill(struct crypto_alg *alg); 97 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask); 98 void crypto_larval_error(const char *name, u32 type, u32 mask); 99 100 void crypto_shoot_alg(struct crypto_alg *alg); 101 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, 102 u32 mask); 103 104 int crypto_register_instance(struct crypto_template *tmpl, 105 struct crypto_instance *inst); 106 107 int crypto_register_notifier(struct notifier_block *nb); 108 int crypto_unregister_notifier(struct notifier_block *nb); 109 110 static inline void crypto_alg_put(struct crypto_alg *alg) 111 { 112 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 113 alg->cra_destroy(alg); 114 } 115 116 static inline int crypto_tmpl_get(struct crypto_template *tmpl) 117 { 118 return try_module_get(tmpl->module); 119 } 120 121 static inline void crypto_tmpl_put(struct crypto_template *tmpl) 122 { 123 module_put(tmpl->module); 124 } 125 126 static inline int crypto_is_larval(struct crypto_alg *alg) 127 { 128 return alg->cra_flags & CRYPTO_ALG_LARVAL; 129 } 130 131 static inline int crypto_is_dead(struct crypto_alg *alg) 132 { 133 return alg->cra_flags & CRYPTO_ALG_DEAD; 134 } 135 136 static inline int crypto_is_moribund(struct crypto_alg *alg) 137 { 138 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 139 } 140 141 static inline int crypto_notify(unsigned long val, void *v) 142 { 143 return blocking_notifier_call_chain(&crypto_chain, val, v); 144 } 145 146 #endif /* _CRYPTO_INTERNAL_H */ 147 148