6bfd48096f
Spawns lock a specific crypto algorithm in place. They can then be used with crypto_spawn_tfm to allocate a tfm for that algorithm. When the base algorithm of a spawn is deregistered, all its spawns will be automatically removed. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* Cryptographic API for algorithms (i.e., low-level API).
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*
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* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_ALGAPI_H
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#define _CRYPTO_ALGAPI_H
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#include <linux/crypto.h>
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struct module;
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struct crypto_instance {
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struct crypto_alg alg;
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struct crypto_template *tmpl;
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struct hlist_node list;
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void *__ctx[] CRYPTO_MINALIGN_ATTR;
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};
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struct crypto_template {
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struct list_head list;
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struct hlist_head instances;
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struct module *module;
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struct crypto_instance *(*alloc)(void *param, unsigned int len);
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void (*free)(struct crypto_instance *inst);
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char name[CRYPTO_MAX_ALG_NAME];
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};
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struct crypto_spawn {
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struct list_head list;
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struct crypto_alg *alg;
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struct crypto_instance *inst;
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};
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int crypto_register_template(struct crypto_template *tmpl);
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void crypto_unregister_template(struct crypto_template *tmpl);
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struct crypto_template *crypto_lookup_template(const char *name);
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int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
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struct crypto_instance *inst);
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void crypto_drop_spawn(struct crypto_spawn *spawn);
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struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn);
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static inline void *crypto_instance_ctx(struct crypto_instance *inst)
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{
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return inst->__ctx;
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}
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#endif /* _CRYPTO_ALGAPI_H */
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