/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Symmetric key ciphers.
*
* Copyright (c) 2007 Herbert Xu <[email protected]>
*/
#ifndef _CRYPTO_INTERNAL_SKCIPHER_H
#define _CRYPTO_INTERNAL_SKCIPHER_H
#include <crypto/algapi.h>
#include <crypto/internal/cipher.h>
#include <crypto/skcipher.h>
#include <linux/list.h>
#include <linux/types.h>
/*
* Set this if your algorithm is sync but needs a reqsize larger
* than MAX_SYNC_SKCIPHER_REQSIZE.
*
* Reuse bit that is specific to hash algorithms.
*/
#define CRYPTO_ALG_SKCIPHER_REQSIZE_LARGE CRYPTO_ALG_OPTIONAL_KEY
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 lskcipher_instance {
void (*free)(struct lskcipher_instance *inst);
union {
struct {
char head[offsetof(struct lskcipher_alg, co.base)];
struct crypto_instance base;
} s;
struct lskcipher_alg alg;
};
};
struct crypto_skcipher_spawn {
struct crypto_spawn base;
};
struct crypto_lskcipher_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 crypto_instance *lskcipher_crypto_instance(
struct lskcipher_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 struct lskcipher_instance *lskcipher_alg_instance(
struct crypto_lskcipher *lskcipher)
{
return container_of(crypto_lskcipher_alg(lskcipher),
struct lskcipher_instance, alg);
}
static inline void *skcipher_instance_ctx(struct skcipher_instance *inst)
{
return crypto_instance_ctx(skcipher_crypto_instance(inst));
}
static inline void *lskcipher_instance_ctx(struct lskcipher_instance *inst)
{
return crypto_instance_ctx(lskcipher_crypto_instance(inst));
}
static inline void skcipher_request_complete(struct skcipher_request *req, int err)
{
crypto_request_complete(&req->base, err);
}
int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
struct crypto_instance *inst,
const char *name, u32 type, u32 mask);
int crypto_grab_lskcipher(struct crypto_lskcipher_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 void crypto_drop_lskcipher(struct crypto_lskcipher_spawn *spawn)
{
crypto_drop_spawn(&spawn->base);
}
static inline struct lskcipher_alg *crypto_lskcipher_spawn_alg(
struct crypto_lskcipher_spawn *spawn)
{
return container_of(spawn->base.alg, struct lskcipher_alg, co.base);
}
static inline struct skcipher_alg_common *crypto_spawn_skcipher_alg_common(
struct crypto_skcipher_spawn *spawn)
{
return container_of(spawn->base.alg, struct skcipher_alg_common, base);
}
static inline struct lskcipher_alg *crypto_spawn_lskcipher_alg(
struct crypto_lskcipher_spawn *spawn)
{
return crypto_lskcipher_spawn_alg(spawn);
}
static inline struct crypto_skcipher *crypto_spawn_skcipher(
struct crypto_skcipher_spawn *spawn)
{
return crypto_spawn_tfm2(&spawn->base);
}
static inline struct crypto_lskcipher *crypto_spawn_lskcipher(
struct crypto_lskcipher_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;
}
static inline void crypto_skcipher_set_reqsize_dma(
struct crypto_skcipher *skcipher, unsigned int reqsize)
{
reqsize += crypto_dma_align() & ~(crypto_tfm_ctx_alignment() - 1);
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 crypto_register_lskcipher(struct lskcipher_alg *alg);
void crypto_unregister_lskcipher(struct lskcipher_alg *alg);
int crypto_register_lskciphers(struct lskcipher_alg *algs, int count);
void crypto_unregister_lskciphers(struct lskcipher_alg *algs, int count);
int lskcipher_register_instance(struct crypto_template *tmpl,
struct lskcipher_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);
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 *crypto_lskcipher_ctx(struct crypto_lskcipher *tfm)
{
return crypto_tfm_ctx(&tfm->base);
}
static inline void *crypto_skcipher_ctx_dma(struct crypto_skcipher *tfm)
{
return crypto_tfm_ctx_dma(&tfm->base);
}
static inline void *skcipher_request_ctx(struct skcipher_request *req)
{
return req->__ctx;
}
static inline void *skcipher_request_ctx_dma(struct skcipher_request *req)
{
unsigned int align = crypto_dma_align();
if (align <= crypto_tfm_ctx_alignment())
align = 1;
return PTR_ALIGN(skcipher_request_ctx(req), align);
}
static inline u32 skcipher_request_flags(struct skcipher_request *req)
{
return req->base.flags;
}
/* 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_cipher_spawn *spawn = skcipher_instance_ctx(inst);
return crypto_spawn_cipher_alg(spawn);
}
static inline struct crypto_lskcipher *lskcipher_cipher_simple(
struct crypto_lskcipher *tfm)
{
struct crypto_lskcipher **ctx = crypto_lskcipher_ctx(tfm);
return *ctx;
}
struct lskcipher_instance *lskcipher_alloc_instance_simple(
struct crypto_template *tmpl, struct rtattr **tb);
static inline struct lskcipher_alg *lskcipher_ialg_simple(
struct lskcipher_instance *inst)
{
struct crypto_lskcipher_spawn *spawn = lskcipher_instance_ctx(inst);
return crypto_lskcipher_spawn_alg(spawn);
}
#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */