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/*
* AEAD: Authenticated Encryption with Associated Data
*
* 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_AEAD_H
#define _CRYPTO_AEAD_H
#include <linux/crypto.h>
#include <linux/kernel.h>
#include <linux/slab.h>
/**
* struct aead_givcrypt_request - AEAD request with IV generation
* @seq: Sequence number for IV generation
* @giv: Space for generated IV
* @areq: The AEAD request itself
*/
struct aead_givcrypt_request {
u64 seq;
u8 *giv;
struct aead_request areq;
};
static inline struct crypto_aead *aead_givcrypt_reqtfm(
struct aead_givcrypt_request *req)
{
return crypto_aead_reqtfm(&req->areq);
}
static inline int crypto_aead_givencrypt(struct aead_givcrypt_request *req)
{
struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req));
return crt->givencrypt(req);
};
static inline int crypto_aead_givdecrypt(struct aead_givcrypt_request *req)
{
struct aead_tfm *crt = crypto_aead_crt(aead_givcrypt_reqtfm(req));
return crt->givdecrypt(req);
};
static inline void aead_givcrypt_set_tfm(struct aead_givcrypt_request *req,
struct crypto_aead *tfm)
{
req->areq.base.tfm = crypto_aead_tfm(tfm);
}
static inline struct aead_givcrypt_request *aead_givcrypt_alloc(
struct crypto_aead *tfm, gfp_t gfp)
{
struct aead_givcrypt_request *req;
req = kmalloc(sizeof(struct aead_givcrypt_request) +
crypto_aead_reqsize(tfm), gfp);
if (likely(req))
aead_givcrypt_set_tfm(req, tfm);
return req;
}
static inline void aead_givcrypt_free(struct aead_givcrypt_request *req)
{
kfree(req);
}
static inline void aead_givcrypt_set_callback(
struct aead_givcrypt_request *req, u32 flags,
crypto_completion_t complete, void *data)
{
aead_request_set_callback(&req->areq, flags, complete, data);
}
static inline void aead_givcrypt_set_crypt(struct aead_givcrypt_request *req,
struct scatterlist *src,
struct scatterlist *dst,
unsigned int nbytes, void *iv)
{
aead_request_set_crypt(&req->areq, src, dst, nbytes, iv);
}
static inline void aead_givcrypt_set_assoc(struct aead_givcrypt_request *req,
struct scatterlist *assoc,
unsigned int assoclen)
{
aead_request_set_assoc(&req->areq, assoc, assoclen);
}
static inline void aead_givcrypt_set_giv(struct aead_givcrypt_request *req,
u8 *giv, u64 seq)
{
req->giv = giv;
req->seq = seq;
}
#endif /* _CRYPTO_AEAD_H */