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