aead.h

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/*
 * AEAD: Authenticated Encryption with Associated Data
 * 
 * Copyright (c) 2007 Herbert Xu <[email protected]>
 *
 * 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 {
    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 */