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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Symmetric key ciphers.
*
* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
*/
#ifndef _CRYPTO_INTERNAL_SKCIPHER_H
#define _CRYPTO_INTERNAL_SKCIPHER_H
#include <crypto/algapi.h>
#include <crypto/skcipher.h>
#include <linux/list.h>
#include <linux/types.h>
struct aead_request;
struct rtattr;
struct skcipher_instance {
void (*free)(struct skcipher_instance *inst);
union {
struct {
char head[offsetof(struct skcipher_alg, base)];
struct crypto_instance base;
} s;
struct skcipher_alg alg;
};
};
struct crypto_skcipher_spawn {
struct crypto_spawn base;
};
struct skcipher_walk {
union {
struct {
struct page *page;
unsigned long offset;
} phys;
struct {
u8 *page;
void *addr;
} virt;
} src, dst;
struct scatter_walk in;
unsigned int nbytes;
struct scatter_walk out;
unsigned int total;
struct list_head buffers;
u8 *page;
u8 *buffer;
u8 *oiv;
void *iv;
unsigned int ivsize;
int flags;
unsigned int blocksize;
unsigned int stride;
unsigned int alignmask;
};
static inline struct crypto_instance *skcipher_crypto_instance(
struct skcipher_instance *inst)
{
return &inst->s.base;
}
static inline struct skcipher_instance *skcipher_alg_instance(
struct crypto_skcipher *skcipher)
{
return container_of(crypto_skcipher_alg(skcipher),
struct skcipher_instance, alg);
}
static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
{
return crypto_instance_ctx(skcipher_crypto_instance(inst));
}
static inline void skcipher_request_complete(struct skcipher_request *req, int err)
{
req->base.complete(&req->base, err);
}
int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask);
static inline void crypto_drop_skcipher(struct crypto_skcipher_spawn *spawn)
{
crypto_drop_spawn(&spawn->base);
}
static inline struct skcipher_alg *crypto_skcipher_spawn_alg(
struct crypto_skcipher_spawn *spawn)
{
return container_of(spawn->base.alg, struct skcipher_alg, base);
}
static inline struct skcipher_alg *crypto_spawn_skcipher_alg(
struct crypto_skcipher_spawn *spawn)
{
return crypto_skcipher_spawn_alg(spawn);
}
static inline struct crypto_skcipher *crypto_spawn_skcipher(
struct crypto_skcipher_spawn *spawn)
{
return crypto_spawn_tfm2(&spawn->base);
}
static inline void crypto_skcipher_set_reqsize(
struct crypto_skcipher *skcipher, unsigned int reqsize)
{
skcipher->reqsize = reqsize;
}
int crypto_register_skcipher(struct skcipher_alg *alg);
void crypto_unregister_skcipher(struct skcipher_alg *alg);
int crypto_register_skciphers(struct skcipher_alg *algs, int count);
void crypto_unregister_skciphers(struct skcipher_alg *algs, int count);
int skcipher_register_instance(struct crypto_template *tmpl,
struct skcipher_instance *inst);
int skcipher_walk_done(struct skcipher_walk *walk, int err);
int skcipher_walk_virt(struct skcipher_walk *walk,
struct skcipher_request *req,
bool atomic);
void skcipher_walk_atomise(struct skcipher_walk *walk);
int skcipher_walk_async(struct skcipher_walk *walk,
struct skcipher_request *req);
int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
struct aead_request *req, bool atomic);
int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
struct aead_request *req, bool atomic);
void skcipher_walk_complete(struct skcipher_walk *walk, int err);
static inline void skcipher_walk_abort(struct skcipher_walk *walk)
{
skcipher_walk_done(walk, -ECANCELED);
}
static inline void *crypto_skcipher_ctx(struct crypto_skcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
}
static inline void *skcipher_request_ctx(struct skcipher_request *req)
{
return req->__ctx;
}
static inline u32 skcipher_request_flags(struct skcipher_request *req)
{
return req->base.flags;
}
static inline unsigned int crypto_skcipher_alg_min_keysize(
struct skcipher_alg *alg)
{
return alg->min_keysize;
}
static inline unsigned int crypto_skcipher_alg_max_keysize(
struct skcipher_alg *alg)
{
return alg->max_keysize;
}
static inline unsigned int crypto_skcipher_alg_walksize(
struct skcipher_alg *alg)
{
return alg->walksize;
}
/**
* crypto_skcipher_walksize() - obtain walk size
* @tfm: cipher handle
*
* In some cases, algorithms can only perform optimally when operating on
* multiple blocks in parallel. This is reflected by the walksize, which
* must be a multiple of the chunksize (or equal if the concern does not
* apply)
*
* Return: walk size in bytes
*/
static inline unsigned int crypto_skcipher_walksize(
struct crypto_skcipher *tfm)
{
return crypto_skcipher_alg_walksize(crypto_skcipher_alg(tfm));
}
/* Helpers for simple block cipher modes of operation */
struct skcipher_ctx_simple {
struct crypto_cipher *cipher; /* underlying block cipher */
};
static inline struct crypto_cipher *
skcipher_cipher_simple(struct crypto_skcipher *tfm)
{
struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
return ctx->cipher;
}
struct skcipher_instance *skcipher_alloc_instance_simple(
struct crypto_template *tmpl, struct rtattr **tb);
static inline struct crypto_alg *skcipher_ialg_simple(
struct skcipher_instance *inst)
{
struct crypto_spawn *spawn = skcipher_instance_ctx(inst);
return spawn->alg;
}
#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */
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