b9c55aa475
This patch makes crypto_alloc_ablkcipher/crypto_grab_skcipher always return algorithms that are capable of generating their own IVs through givencrypt and givdecrypt. Each algorithm may specify its default IV generator through the geniv field. For algorithms that do not set the geniv field, the blkcipher layer will pick a default. Currently it's chainiv for synchronous algorithms and eseqiv for asynchronous algorithms. Note that if these wrappers do not work on an algorithm then that algorithm must specify its own geniv or it can't be used at all. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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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/skcipher.h>
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#include <linux/types.h>
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struct rtattr;
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struct crypto_skcipher_spawn {
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struct crypto_spawn base;
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};
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extern const struct crypto_type crypto_givcipher_type;
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static inline void crypto_set_skcipher_spawn(
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struct crypto_skcipher_spawn *spawn, struct crypto_instance *inst)
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{
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crypto_set_spawn(&spawn->base, inst);
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}
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int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name,
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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 crypto_alg *crypto_skcipher_spawn_alg(
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struct crypto_skcipher_spawn *spawn)
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{
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return spawn->base.alg;
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}
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static inline struct crypto_ablkcipher *crypto_spawn_skcipher(
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struct crypto_skcipher_spawn *spawn)
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{
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return __crypto_ablkcipher_cast(
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crypto_spawn_tfm(&spawn->base, crypto_skcipher_type(0),
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crypto_skcipher_mask(0)));
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}
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int skcipher_null_givencrypt(struct skcipher_givcrypt_request *req);
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int skcipher_null_givdecrypt(struct skcipher_givcrypt_request *req);
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const char *crypto_default_geniv(const struct crypto_alg *alg);
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struct crypto_instance *skcipher_geniv_alloc(struct crypto_template *tmpl,
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struct rtattr **tb, u32 type,
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u32 mask);
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void skcipher_geniv_free(struct crypto_instance *inst);
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int skcipher_geniv_init(struct crypto_tfm *tfm);
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void skcipher_geniv_exit(struct crypto_tfm *tfm);
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static inline struct crypto_ablkcipher *skcipher_geniv_cipher(
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struct crypto_ablkcipher *geniv)
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{
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return crypto_ablkcipher_crt(geniv)->base;
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}
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static inline void *skcipher_givcrypt_reqctx(
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struct skcipher_givcrypt_request *req)
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{
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return ablkcipher_request_ctx(&req->creq);
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}
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static inline void ablkcipher_request_complete(struct ablkcipher_request *req,
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int err)
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{
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req->base.complete(&req->base, err);
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}
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static inline void skcipher_givcrypt_complete(
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struct skcipher_givcrypt_request *req, int err)
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{
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ablkcipher_request_complete(&req->creq, err);
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}
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#endif /* _CRYPTO_INTERNAL_SKCIPHER_H */
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