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/*
* Symmetric key ciphers.
*
* Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#ifndef _CRYPTO_SKCIPHER_H
#define _CRYPTO_SKCIPHER_H
#include <linux/crypto.h>
#include <linux/kernel.h>
#include <linux/slab.h>
/**
* struct skcipher_givcrypt_request - Crypto request with IV generation
* @seq: Sequence number for IV generation
* @giv: Space for generated IV
* @creq: The crypto request itself
*/
struct skcipher_givcrypt_request {
u64 seq;
u8 *giv;
struct ablkcipher_request creq;
};
static inline struct crypto_ablkcipher *skcipher_givcrypt_reqtfm(
struct skcipher_givcrypt_request *req)
{
return crypto_ablkcipher_reqtfm(&req->creq);
}
static inline int crypto_skcipher_givencrypt(
struct skcipher_givcrypt_request *req)
{
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));
return crt->givencrypt(req);
};
static inline int crypto_skcipher_givdecrypt(
struct skcipher_givcrypt_request *req)
{
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(skcipher_givcrypt_reqtfm(req));
return crt->givdecrypt(req);
};
static inline void skcipher_givcrypt_set_tfm(
struct skcipher_givcrypt_request *req, struct crypto_ablkcipher *tfm)
{
req->creq.base.tfm = crypto_ablkcipher_tfm(tfm);
}
static inline struct skcipher_givcrypt_request *skcipher_givcrypt_cast(
struct crypto_async_request *req)
{
return container_of(ablkcipher_request_cast(req),
struct skcipher_givcrypt_request, creq);
}
static inline struct skcipher_givcrypt_request *skcipher_givcrypt_alloc(
struct crypto_ablkcipher *tfm, gfp_t gfp)
{
struct skcipher_givcrypt_request *req;
req = kmalloc(sizeof(struct skcipher_givcrypt_request) +
crypto_ablkcipher_reqsize(tfm), gfp);
if (likely(req))
skcipher_givcrypt_set_tfm(req, tfm);
return req;
}
static inline void skcipher_givcrypt_free(struct skcipher_givcrypt_request *req)
{
kfree(req);
}
static inline void skcipher_givcrypt_set_callback(
struct skcipher_givcrypt_request *req, u32 flags,
crypto_completion_t complete, void *data)
{
ablkcipher_request_set_callback(&req->creq, flags, complete, data);
}
static inline void skcipher_givcrypt_set_crypt(
struct skcipher_givcrypt_request *req,
struct scatterlist *src, struct scatterlist *dst,
unsigned int nbytes, void *iv)
{
ablkcipher_request_set_crypt(&req->creq, src, dst, nbytes, iv);
}
static inline void skcipher_givcrypt_set_giv(
struct skcipher_givcrypt_request *req, u8 *giv, u64 seq)
{
req->giv = giv;
req->seq = seq;
}
#endif /* _CRYPTO_SKCIPHER_H */
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