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crypto: akcipher - add akcipher declarations needed by templates.

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Add a struct akcipher_instance and struct akcipher_spawn similar to
how AEAD declares them and the macros for converting to/from
crypto_instance/crypto_spawn.  Also add register functions to
avoid exposing crypto_akcipher_type.

Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Andrzej Zaborowski 2015-12-05 17:09:33 +01:00 committed by Herbert Xu
parent 3771df3cff
commit 28a4618ad1
2 changed files with 111 additions and 1 deletions
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34
crypto/akcipher.c
View file

@ -21,6 +21,7 @@
#include <linux/cryptouser.h>
#include <net/netlink.h>
#include <crypto/akcipher.h>
#include <crypto/internal/akcipher.h>
#include "internal.h"
#ifdef CONFIG_NET
@ -75,9 +76,17 @@ static int crypto_akcipher_init_tfm(struct crypto_tfm *tfm)
return 0;
}
static void crypto_akcipher_free_instance(struct crypto_instance *inst)
{
struct akcipher_instance *akcipher = akcipher_instance(inst);
akcipher->free(akcipher);
}
static const struct crypto_type crypto_akcipher_type = {
.extsize = crypto_alg_extsize,
.init_tfm = crypto_akcipher_init_tfm,
.free = crypto_akcipher_free_instance,
#ifdef CONFIG_PROC_FS
.show = crypto_akcipher_show,
#endif
@ -88,6 +97,14 @@ static const struct crypto_type crypto_akcipher_type = {
.tfmsize = offsetof(struct crypto_akcipher, base),
};
int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
u32 type, u32 mask)
{
spawn->base.frontend = &crypto_akcipher_type;
return crypto_grab_spawn(&spawn->base, name, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_grab_akcipher);
struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
u32 mask)
{
@ -95,13 +112,20 @@ struct crypto_akcipher *crypto_alloc_akcipher(const char *alg_name, u32 type,
}
EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
int crypto_register_akcipher(struct akcipher_alg *alg)
static void akcipher_prepare_alg(struct akcipher_alg *alg)
{
struct crypto_alg *base = &alg->base;
base->cra_type = &crypto_akcipher_type;
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
}
int crypto_register_akcipher(struct akcipher_alg *alg)
{
struct crypto_alg *base = &alg->base;
akcipher_prepare_alg(alg);
return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_akcipher);
@ -112,5 +136,13 @@ void crypto_unregister_akcipher(struct akcipher_alg *alg)
}
EXPORT_SYMBOL_GPL(crypto_unregister_akcipher);
int akcipher_register_instance(struct crypto_template *tmpl,
struct akcipher_instance *inst)
{
akcipher_prepare_alg(&inst->alg);
return crypto_register_instance(tmpl, akcipher_crypto_instance(inst));
}
EXPORT_SYMBOL_GPL(akcipher_register_instance);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Generic public key cipher type");

78
include/crypto/internal/akcipher.h
View file

@ -13,6 +13,22 @@
#ifndef _CRYPTO_AKCIPHER_INT_H
#define _CRYPTO_AKCIPHER_INT_H
#include <crypto/akcipher.h>
#include <crypto/algapi.h>
struct akcipher_instance {
void (*free)(struct akcipher_instance *inst);
union {
struct {
char head[offsetof(struct akcipher_alg, base)];
struct crypto_instance base;
} s;
struct akcipher_alg alg;
};
};
struct crypto_akcipher_spawn {
struct crypto_spawn base;
};
/*
* Transform internal helpers.
@ -38,6 +54,56 @@ static inline const char *akcipher_alg_name(struct crypto_akcipher *tfm)
return crypto_akcipher_tfm(tfm)->__crt_alg->cra_name;
}
static inline struct crypto_instance *akcipher_crypto_instance(
struct akcipher_instance *inst)
{
return container_of(&inst->alg.base, struct crypto_instance, alg);
}
static inline struct akcipher_instance *akcipher_instance(
struct crypto_instance *inst)
{
return container_of(&inst->alg, struct akcipher_instance, alg.base);
}
static inline struct akcipher_instance *akcipher_alg_instance(
struct crypto_akcipher *akcipher)
{
return akcipher_instance(crypto_tfm_alg_instance(&akcipher->base));
}
static inline void *akcipher_instance_ctx(struct akcipher_instance *inst)
{
return crypto_instance_ctx(akcipher_crypto_instance(inst));
}
static inline void crypto_set_akcipher_spawn(
struct crypto_akcipher_spawn *spawn,
struct crypto_instance *inst)
{
crypto_set_spawn(&spawn->base, inst);
}
int crypto_grab_akcipher(struct crypto_akcipher_spawn *spawn, const char *name,
u32 type, u32 mask);
static inline struct crypto_akcipher *crypto_spawn_akcipher(
struct crypto_akcipher_spawn *spawn)
{
return crypto_spawn_tfm2(&spawn->base);
}
static inline void crypto_drop_akcipher(struct crypto_akcipher_spawn *spawn)
{
crypto_drop_spawn(&spawn->base);
}
static inline struct akcipher_alg *crypto_spawn_akcipher_alg(
struct crypto_akcipher_spawn *spawn)
{
return container_of(spawn->base.alg, struct akcipher_alg, base);
}
/**
* crypto_register_akcipher() -- Register public key algorithm
*
@ -57,4 +123,16 @@ int crypto_register_akcipher(struct akcipher_alg *alg);
* @alg: algorithm definition
*/
void crypto_unregister_akcipher(struct akcipher_alg *alg);
/**
* akcipher_register_instance() -- Unregister public key template instance
*
* Function registers an implementation of an asymmetric key algorithm
* created from a template
*
* @tmpl: the template from which the algorithm was created
* @inst: the template instance
*/
int akcipher_register_instance(struct crypto_template *tmpl,
struct akcipher_instance *inst);
#endif