3a282bd2e7
This patch finally makes the givencrypt/givdecrypt operations available to users by adding crypto_aead_givencrypt and crypto_aead_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>
106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
/*
|
|
* 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 */
|