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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* AEAD: Authenticated Encryption with Associated Data
*
* Copyright (c) 2007-2015 Herbert Xu <herbert@gondor.apana.org.au>
*/
#ifndef _CRYPTO_INTERNAL_AEAD_H
#define _CRYPTO_INTERNAL_AEAD_H
#include <crypto/aead.h>
#include <crypto/algapi.h>
#include <linux/stddef.h>
#include <linux/types.h>
struct rtattr;
struct aead_instance {
void (*free)(struct aead_instance *inst);
union {
struct {
char head[offsetof(struct aead_alg, base)];
struct crypto_instance base;
} s;
struct aead_alg alg;
};
};
struct crypto_aead_spawn {
struct crypto_spawn base;
};
struct aead_queue {
struct crypto_queue base;
};
static inline void *crypto_aead_ctx(struct crypto_aead *tfm)
{
return crypto_tfm_ctx(&tfm->base);
}
static inline void *crypto_aead_ctx_dma(struct crypto_aead *tfm)
{
return crypto_tfm_ctx_dma(&tfm->base);
}
static inline struct crypto_instance *aead_crypto_instance(
struct aead_instance *inst)
{
return container_of(&inst->alg.base, struct crypto_instance, alg);
}
static inline struct aead_instance *aead_instance(struct crypto_instance *inst)
{
return container_of(&inst->alg, struct aead_instance, alg.base);
}
static inline struct aead_instance *aead_alg_instance(struct crypto_aead *aead)
{
return aead_instance(crypto_tfm_alg_instance(&aead->base));
}
static inline void *aead_instance_ctx(struct aead_instance *inst)
{
return crypto_instance_ctx(aead_crypto_instance(inst));
}
static inline void *aead_request_ctx(struct aead_request *req)
{
return req->__ctx;
}
static inline void *aead_request_ctx_dma(struct aead_request *req)
{
unsigned int align = crypto_dma_align();
if (align <= crypto_tfm_ctx_alignment())
align = 1;
return PTR_ALIGN(aead_request_ctx(req), align);
}
static inline void aead_request_complete(struct aead_request *req, int err)
{
req->base.complete(&req->base, err);
}
static inline u32 aead_request_flags(struct aead_request *req)
{
return req->base.flags;
}
static inline struct aead_request *aead_request_cast(
struct crypto_async_request *req)
{
return container_of(req, struct aead_request, base);
}
int crypto_grab_aead(struct crypto_aead_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask);
static inline void crypto_drop_aead(struct crypto_aead_spawn *spawn)
{
crypto_drop_spawn(&spawn->base);
}
static inline struct aead_alg *crypto_spawn_aead_alg(
struct crypto_aead_spawn *spawn)
{
return container_of(spawn->base.alg, struct aead_alg, base);
}
static inline struct crypto_aead *crypto_spawn_aead(
struct crypto_aead_spawn *spawn)
{
return crypto_spawn_tfm2(&spawn->base);
}
static inline void crypto_aead_set_reqsize(struct crypto_aead *aead,
unsigned int reqsize)
{
aead->reqsize = reqsize;
}
static inline void crypto_aead_set_reqsize_dma(struct crypto_aead *aead,
unsigned int reqsize)
{
reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
aead->reqsize = reqsize;
}
static inline void aead_init_queue(struct aead_queue *queue,
unsigned int max_qlen)
{
crypto_init_queue(&queue->base, max_qlen);
}
static inline unsigned int crypto_aead_alg_chunksize(struct aead_alg *alg)
{
return alg->chunksize;
}
/**
* crypto_aead_chunksize() - obtain chunk size
* @tfm: cipher handle
*
* The block size is set to one for ciphers such as CCM. However,
* you still need to provide incremental updates in multiples of
* the underlying block size as the IV does not have sub-block
* granularity. This is known in this API as the chunk size.
*
* Return: chunk size in bytes
*/
static inline unsigned int crypto_aead_chunksize(struct crypto_aead *tfm)
{
return crypto_aead_alg_chunksize(crypto_aead_alg(tfm));
}
int crypto_register_aead(struct aead_alg *alg);
void crypto_unregister_aead(struct aead_alg *alg);
int crypto_register_aeads(struct aead_alg *algs, int count);
void crypto_unregister_aeads(struct aead_alg *algs, int count);
int aead_register_instance(struct crypto_template *tmpl,
struct aead_instance *inst);
#endif /* _CRYPTO_INTERNAL_AEAD_H */
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