| 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 | void *crypto_create_tfm(struct crypto_alg *alg, |
| 113 | const struct crypto_type *frontend); |
| 114 | void *crypto_alloc_tfm(const char *alg_name, |
| 115 | const struct crypto_type *frontend, u32 type, u32 mask); |
| 116 | |
| 117 | int crypto_register_instance(struct crypto_template *tmpl, |
| 118 | struct crypto_instance *inst); |
| 119 | |
| 120 | int crypto_register_notifier(struct notifier_block *nb); |
| 121 | int crypto_unregister_notifier(struct notifier_block *nb); |
| 122 | int crypto_probing_notify(unsigned long val, void *v); |
| 123 | |
| 124 | static inline void crypto_alg_put(struct crypto_alg *alg) |
| 125 | { |
| 126 | if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) |
| 127 | alg->cra_destroy(alg); |
| 128 | } |
| 129 | |
| 130 | static inline int crypto_tmpl_get(struct crypto_template *tmpl) |
| 131 | { |
| 132 | return try_module_get(tmpl->module); |
| 133 | } |
| 134 | |
| 135 | static inline void crypto_tmpl_put(struct crypto_template *tmpl) |
| 136 | { |
| 137 | module_put(tmpl->module); |
| 138 | } |
| 139 | |
| 140 | static inline int crypto_is_larval(struct crypto_alg *alg) |
| 141 | { |
| 142 | return alg->cra_flags & CRYPTO_ALG_LARVAL; |
| 143 | } |
| 144 | |
| 145 | static inline int crypto_is_dead(struct crypto_alg *alg) |
| 146 | { |
| 147 | return alg->cra_flags & CRYPTO_ALG_DEAD; |
| 148 | } |
| 149 | |
| 150 | static inline int crypto_is_moribund(struct crypto_alg *alg) |
| 151 | { |
| 152 | return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); |
| 153 | } |
| 154 | |
| 155 | static inline void crypto_notify(unsigned long val, void *v) |
| 156 | { |
| 157 | blocking_notifier_call_chain(&crypto_chain, val, v); |
| 158 | } |
| 159 | |
| 160 | #endif /* _CRYPTO_INTERNAL_H */ |
| 161 | |