03bf712fb4
This patch finally makes the givencrypt/givdecrypt operations available to users by adding crypto_skcipher_givencrypt and crypto_skcipher_givdecrypt. A suite of helpers to allocate and fill in the request is also available. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
110 lines
2.7 KiB
C
110 lines
2.7 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_SKCIPHER_H
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#define _CRYPTO_SKCIPHER_H
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#include <linux/crypto.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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/**
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* struct skcipher_givcrypt_request - Crypto request with IV generation
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* @seq: Sequence number for IV generation
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* @giv: Space for generated IV
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* @creq: The crypto request itself
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*/
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struct skcipher_givcrypt_request {
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u64 seq;
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u8 *giv;
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struct ablkcipher_request creq;
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};
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static inline struct crypto_ablkcipher *skcipher_givcrypt_reqtfm(
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struct skcipher_givcrypt_request *req)
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{
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return crypto_ablkcipher_reqtfm(&req->creq);
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}
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static inline int crypto_skcipher_givencrypt(
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struct skcipher_givcrypt_request *req)
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{
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struct ablkcipher_tfm *crt =
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crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));
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return crt->givencrypt(req);
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};
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static inline int crypto_skcipher_givdecrypt(
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struct skcipher_givcrypt_request *req)
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{
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struct ablkcipher_tfm *crt =
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crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));
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return crt->givdecrypt(req);
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};
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static inline void skcipher_givcrypt_set_tfm(
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struct skcipher_givcrypt_request *req, struct crypto_ablkcipher *tfm)
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{
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req->creq.base.tfm = crypto_ablkcipher_tfm(tfm);
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}
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static inline struct skcipher_givcrypt_request *skcipher_givcrypt_cast(
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struct crypto_async_request *req)
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{
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return container_of(ablkcipher_request_cast(req),
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struct skcipher_givcrypt_request, creq);
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}
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static inline struct skcipher_givcrypt_request *skcipher_givcrypt_alloc(
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struct crypto_ablkcipher *tfm, gfp_t gfp)
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{
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struct skcipher_givcrypt_request *req;
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req = kmalloc(sizeof(struct skcipher_givcrypt_request) +
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crypto_ablkcipher_reqsize(tfm), gfp);
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if (likely(req))
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skcipher_givcrypt_set_tfm(req, tfm);
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return req;
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}
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static inline void skcipher_givcrypt_free(struct skcipher_givcrypt_request *req)
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{
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kfree(req);
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}
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static inline void skcipher_givcrypt_set_callback(
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struct skcipher_givcrypt_request *req, u32 flags,
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crypto_completion_t complete, void *data)
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{
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ablkcipher_request_set_callback(&req->creq, flags, complete, data);
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}
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static inline void skcipher_givcrypt_set_crypt(
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struct skcipher_givcrypt_request *req,
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struct scatterlist *src, struct scatterlist *dst,
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unsigned int nbytes, void *iv)
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{
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ablkcipher_request_set_crypt(&req->creq, src, dst, nbytes, iv);
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}
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static inline void skcipher_givcrypt_set_giv(
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struct skcipher_givcrypt_request *req, u8 *giv, u64 seq)
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{
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req->giv = giv;
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req->seq = seq;
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}
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#endif /* _CRYPTO_SKCIPHER_H */
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