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;
48 extern struct list_head crypto_alg_list;
49 extern struct rw_semaphore crypto_alg_sem;
50 extern struct blocking_notifier_head crypto_chain;
52 extern enum km_type crypto_km_types[];
54 static inline enum km_type crypto_kmap_type(int out)
56 return crypto_km_types[(in_softirq() ? 2 : 0) + out];
59 static inline void *crypto_kmap(struct page *page, int out)
61 return kmap_atomic(page, crypto_kmap_type(out));
64 static inline void crypto_kunmap(void *vaddr, int out)
66 kunmap_atomic(vaddr, crypto_kmap_type(out));
69 static inline void crypto_yield(struct crypto_tfm *tfm)
71 if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP)
75 #ifdef CONFIG_CRYPTO_HMAC
76 int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
77 void crypto_free_hmac_block(struct crypto_tfm *tfm);
79 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
84 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
89 void __init crypto_init_proc(void);
90 void __exit crypto_exit_proc(void);
92 static inline void crypto_init_proc(void)
94 static inline void crypto_exit_proc(void)
98 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg,
101 return alg->cra_ctxsize;
104 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg,
107 unsigned int len = alg->cra_ctxsize;
109 switch (flags & CRYPTO_TFM_MODE_MASK) {
110 case CRYPTO_TFM_MODE_CBC:
111 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
112 len += alg->cra_blocksize;
119 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg,
122 return alg->cra_ctxsize;
125 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
126 void crypto_mod_put(struct crypto_alg *alg);
127 struct crypto_alg *__crypto_alg_lookup(const char *name);
129 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags);
130 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags);
131 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags);
133 int crypto_init_digest_ops(struct crypto_tfm *tfm);
134 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
135 int crypto_init_compress_ops(struct crypto_tfm *tfm);
137 void crypto_exit_digest_ops(struct crypto_tfm *tfm);
138 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
139 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
141 void crypto_larval_error(const char *name);
143 int crypto_register_instance(struct crypto_template *tmpl,
144 struct crypto_instance *inst);
146 int crypto_register_notifier(struct notifier_block *nb);
147 int crypto_unregister_notifier(struct notifier_block *nb);
149 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
151 return try_module_get(tmpl->module);
154 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
156 module_put(tmpl->module);
159 static inline int crypto_is_larval(struct crypto_alg *alg)
161 return alg->cra_flags & CRYPTO_ALG_LARVAL;
164 static inline int crypto_notify(unsigned long val, void *v)
166 return blocking_notifier_call_chain(&crypto_chain, val, v);
169 #endif /* _CRYPTO_INTERNAL_H */