| /* 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); |
| } |
| |
| static inline void crypto_set_skcipher_spawn( |
| struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst) |
| { |
| crypto_set_spawn(&spawn->base, inst); |
| } |
| |
| int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, 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(struct skcipher_walk *walk, struct aead_request *req, |
| bool atomic); |
| 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 ablkcipher_request_complete(struct ablkcipher_request *req, |
| int err) |
| { |
| req->base.complete(&req->base, err); |
| } |
| |
| static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req) |
| { |
| return req->base.flags; |
| } |
| |
| 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) |
| { |
| if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) == |
| CRYPTO_ALG_TYPE_BLKCIPHER) |
| return alg->base.cra_blkcipher.min_keysize; |
| |
| if (alg->base.cra_ablkcipher.encrypt) |
| return alg->base.cra_ablkcipher.min_keysize; |
| |
| return alg->min_keysize; |
| } |
| |
| static inline unsigned int crypto_skcipher_alg_max_keysize( |
| struct skcipher_alg *alg) |
| { |
| if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) == |
| CRYPTO_ALG_TYPE_BLKCIPHER) |
| return alg->base.cra_blkcipher.max_keysize; |
| |
| if (alg->base.cra_ablkcipher.encrypt) |
| return alg->base.cra_ablkcipher.max_keysize; |
| |
| return alg->max_keysize; |
| } |
| |
| static inline unsigned int crypto_skcipher_alg_walksize( |
| struct skcipher_alg *alg) |
| { |
| if ((alg->base.cra_flags & CRYPTO_ALG_TYPE_MASK) == |
| CRYPTO_ALG_TYPE_BLKCIPHER) |
| return alg->base.cra_blocksize; |
| |
| if (alg->base.cra_ablkcipher.encrypt) |
| return alg->base.cra_blocksize; |
| |
| 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, |
| struct crypto_alg **cipher_alg_ret); |
| |
| #endif /* _CRYPTO_INTERNAL_SKCIPHER_H */ |
| |