/*
   * 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 */