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101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
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* Symmetric key ciphers.
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*
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* Copyright (c) 2007-2015 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_SKCIPHER_H
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#define _CRYPTO_SKCIPHER_H
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#include <linux/crypto.h>
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struct crypto_skcipher;
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struct skcipher_request;
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struct skcipher_alg {
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struct crypto_alg base;
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};
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int crypto_register_skcipher(struct skcipher_alg *alg);
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struct crypto_skcipher {
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int (*setkey)(struct crypto_skcipher *tfm, const u8 *key,
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unsigned int keylen);
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int (*encrypt)(struct skcipher_request *req);
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int (*decrypt)(struct skcipher_request *req);
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unsigned ivsize;
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unsigned keysize;
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struct crypto_tfm base;
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};
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struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
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u32 type, u32 mask);
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static inline void crypto_free_skcipher(struct crypto_skcipher *tfm)
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{
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kfree(tfm);
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}
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struct skcipher_request {
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unsigned cryptlen;
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u8 *iv;
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struct scatterlist *src;
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struct scatterlist *dst;
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struct crypto_tfm *tfm;
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};
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#define SKCIPHER_REQUEST_ON_STACK(name, tfm) \
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struct skcipher_request __##name##_desc; \
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struct skcipher_request *name = &__##name##_desc
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static inline int crypto_skcipher_setkey(struct crypto_skcipher *tfm,
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const u8 *key, unsigned int keylen)
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{
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return tfm->setkey(tfm, key, keylen);
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}
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static inline struct crypto_skcipher *crypto_skcipher_reqtfm(
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struct skcipher_request *req)
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{
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return container_of(req->tfm, struct crypto_skcipher, base);
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}
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static inline int crypto_skcipher_encrypt(struct skcipher_request *req)
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{
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return crypto_skcipher_reqtfm(req)->encrypt(req);
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}
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static inline int crypto_skcipher_decrypt(struct skcipher_request *req)
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{
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return crypto_skcipher_reqtfm(req)->decrypt(req);
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}
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static inline void skcipher_request_set_tfm(struct skcipher_request *req,
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struct crypto_skcipher *tfm)
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{
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req->tfm = &tfm->base;
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}
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static inline void skcipher_request_set_crypt(
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struct skcipher_request *req,
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struct scatterlist *src, struct scatterlist *dst,
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unsigned int cryptlen, void *iv)
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{
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req->src = src;
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req->dst = dst;
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req->cryptlen = cryptlen;
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req->iv = iv;
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}
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#endif /* _CRYPTO_SKCIPHER_H */
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