254 lines
6.1 KiB
C
254 lines
6.1 KiB
C
/* 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/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 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)
|
|
{
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
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 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_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;
|
|
}
|
|
|
|
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_cipher_spawn *spawn = skcipher_instance_ctx(inst);
|
|
|
|
return crypto_spawn_cipher_alg(spawn);
|
|
}
|
|
|
|
#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */
|
|
|