4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
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)
13 #ifndef _CRYPTO_INTERNAL_H
14 #define _CRYPTO_INTERNAL_H
16 #include <crypto/algapi.h>
17 #include <linux/completion.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 <asm/kmap_types.h>
30 /* Crypto notification events. */
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,
39 struct crypto_instance;
40 struct crypto_template;
42 struct crypto_larval {
43 struct crypto_alg alg;
44 struct crypto_alg *adult;
45 struct completion completion;
49 extern struct list_head crypto_alg_list;
50 extern struct rw_semaphore crypto_alg_sem;
51 extern struct blocking_notifier_head crypto_chain;
53 extern enum km_type crypto_km_types[];
55 static inline enum km_type crypto_kmap_type(int out)
57 return crypto_km_types[(in_softirq() ? 2 : 0) + out];
60 static inline void *crypto_kmap(struct page *page, int out)
62 return kmap_atomic(page, crypto_kmap_type(out));
65 static inline void crypto_kunmap(void *vaddr, int out)
67 kunmap_atomic(vaddr, crypto_kmap_type(out));
70 static inline void crypto_yield(u32 flags)
72 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
77 void __init crypto_init_proc(void);
78 void __exit crypto_exit_proc(void);
80 static inline void crypto_init_proc(void)
82 static inline void crypto_exit_proc(void)
86 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
89 unsigned int len = alg->cra_ctxsize;
91 if (alg->cra_alignmask) {
92 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
93 len += alg->cra_digest.dia_digestsize;
99 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
102 unsigned int len = alg->cra_ctxsize;
104 switch (flags & CRYPTO_TFM_MODE_MASK) {
105 case CRYPTO_TFM_MODE_CBC:
106 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
107 len += alg->cra_blocksize;
114 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
117 return alg->cra_ctxsize;
120 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
121 struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
122 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
124 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
125 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
126 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
128 int crypto_init_digest_ops(struct crypto_tfm *tfm);
129 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
130 int crypto_init_compress_ops(struct crypto_tfm *tfm);
132 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
133 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
134 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
136 void crypto_larval_error(const char *name, u32 type, u32 mask);
138 void crypto_shoot_alg(struct crypto_alg *alg);
139 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags);
141 int crypto_register_instance(struct crypto_template *tmpl,
142 struct crypto_instance *inst);
144 int crypto_register_notifier(struct notifier_block *nb);
145 int crypto_unregister_notifier(struct notifier_block *nb);
147 static inline void crypto_alg_put(struct crypto_alg *alg)
149 if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
150 alg->cra_destroy(alg);
153 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
155 return try_module_get(tmpl->module);
158 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
160 module_put(tmpl->module);
163 static inline int crypto_is_larval(struct crypto_alg *alg)
165 return alg->cra_flags & CRYPTO_ALG_LARVAL;
168 static inline int crypto_is_dead(struct crypto_alg *alg)
170 return alg->cra_flags & CRYPTO_ALG_DEAD;
173 static inline int crypto_is_moribund(struct crypto_alg *alg)
175 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
178 static inline int crypto_notify(unsigned long val, void *v)
180 return blocking_notifier_call_chain(&crypto_chain, val, v);
183 #endif /* _CRYPTO_INTERNAL_H */