/*
   * Scatterlist Cryptographic API.
   *
   * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
   * Copyright (c) 2002 David S. Miller (davem@redhat.com)

   * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>

   *
   * Portions derived from Cryptoapi, by Alexander Kjeldaas <astor@fast.no>

   * and Nettle, by Niels Möller.

   * 
   * 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 _LINUX_CRYPTO_H
  #define _LINUX_CRYPTO_H

  #include <linux/atomic.h>

  #include <linux/kernel.h>

  #include <linux/list.h>

  #include <linux/slab.h>

  #include <linux/string.h>

  #include <linux/uaccess.h>

  
  /*
   * Algorithm masks and types.
   */

  #define CRYPTO_ALG_TYPE_MASK		0x0000000f

  #define CRYPTO_ALG_TYPE_CIPHER		0x00000001

  #define CRYPTO_ALG_TYPE_COMPRESS	0x00000002
  #define CRYPTO_ALG_TYPE_AEAD		0x00000003

  #define CRYPTO_ALG_TYPE_BLKCIPHER	0x00000004

  #define CRYPTO_ALG_TYPE_ABLKCIPHER	0x00000005

  #define CRYPTO_ALG_TYPE_GIVCIPHER	0x00000006

  #define CRYPTO_ALG_TYPE_DIGEST		0x00000008

  #define CRYPTO_ALG_TYPE_HASH		0x00000008
  #define CRYPTO_ALG_TYPE_SHASH		0x00000009

  #define CRYPTO_ALG_TYPE_AHASH		0x0000000a

  #define CRYPTO_ALG_TYPE_RNG		0x0000000c

  #define CRYPTO_ALG_TYPE_PCOMPRESS	0x0000000f

  
  #define CRYPTO_ALG_TYPE_HASH_MASK	0x0000000e

  #define CRYPTO_ALG_TYPE_AHASH_MASK	0x0000000c

  #define CRYPTO_ALG_TYPE_BLKCIPHER_MASK	0x0000000c

  #define CRYPTO_ALG_LARVAL		0x00000010

  #define CRYPTO_ALG_DEAD			0x00000020
  #define CRYPTO_ALG_DYING		0x00000040

  #define CRYPTO_ALG_ASYNC		0x00000080

  /*

   * Set this bit if and only if the algorithm requires another algorithm of
   * the same type to handle corner cases.
   */
  #define CRYPTO_ALG_NEED_FALLBACK	0x00000100
  
  /*

   * This bit is set for symmetric key ciphers that have already been wrapped
   * with a generic IV generator to prevent them from being wrapped again.
   */
  #define CRYPTO_ALG_GENIV		0x00000200
  
  /*

   * Set if the algorithm has passed automated run-time testing.  Note that
   * if there is no run-time testing for a given algorithm it is considered
   * to have passed.
   */
  
  #define CRYPTO_ALG_TESTED		0x00000400
  
  /*

   * Set if the algorithm is an instance that is build from templates.
   */
  #define CRYPTO_ALG_INSTANCE		0x00000800
  
  /*

   * Transform masks and values (for crt_flags).
   */

  #define CRYPTO_TFM_REQ_MASK		0x000fff00
  #define CRYPTO_TFM_RES_MASK		0xfff00000

  #define CRYPTO_TFM_REQ_WEAK_KEY		0x00000100

  #define CRYPTO_TFM_REQ_MAY_SLEEP	0x00000200

  #define CRYPTO_TFM_REQ_MAY_BACKLOG	0x00000400

  #define CRYPTO_TFM_RES_WEAK_KEY		0x00100000
  #define CRYPTO_TFM_RES_BAD_KEY_LEN   	0x00200000
  #define CRYPTO_TFM_RES_BAD_KEY_SCHED 	0x00400000
  #define CRYPTO_TFM_RES_BAD_BLOCK_LEN 	0x00800000
  #define CRYPTO_TFM_RES_BAD_FLAGS 	0x01000000
  
  /*
   * Miscellaneous stuff.
   */

  #define CRYPTO_MAX_ALG_NAME		64

  /*
   * The macro CRYPTO_MINALIGN_ATTR (along with the void * type in the actual
   * declaration) is used to ensure that the crypto_tfm context structure is
   * aligned correctly for the given architecture so that there are no alignment
   * faults for C data types.  In particular, this is required on platforms such
   * as arm where pointers are 32-bit aligned but there are data types such as
   * u64 which require 64-bit alignment.
   */

  #define CRYPTO_MINALIGN ARCH_KMALLOC_MINALIGN

  #define CRYPTO_MINALIGN_ATTR __attribute__ ((__aligned__(CRYPTO_MINALIGN)))

  struct scatterlist;

  struct crypto_ablkcipher;
  struct crypto_async_request;

  struct crypto_aead;

  struct crypto_blkcipher;

  struct crypto_hash;

  struct crypto_rng;

  struct crypto_tfm;

  struct crypto_type;

  struct aead_givcrypt_request;

  struct skcipher_givcrypt_request;

  typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
  
  struct crypto_async_request {
  	struct list_head list;
  	crypto_completion_t complete;
  	void *data;
  	struct crypto_tfm *tfm;
  
  	u32 flags;
  };
  
  struct ablkcipher_request {
  	struct crypto_async_request base;
  
  	unsigned int nbytes;
  
  	void *info;
  
  	struct scatterlist *src;
  	struct scatterlist *dst;
  
  	void *__ctx[] CRYPTO_MINALIGN_ATTR;
  };

  /**
   *	struct aead_request - AEAD request
   *	@base: Common attributes for async crypto requests
   *	@assoclen: Length in bytes of associated data for authentication
   *	@cryptlen: Length of data to be encrypted or decrypted
   *	@iv: Initialisation vector
   *	@assoc: Associated data
   *	@src: Source data
   *	@dst: Destination data
   *	@__ctx: Start of private context data
   */
  struct aead_request {
  	struct crypto_async_request base;
  
  	unsigned int assoclen;
  	unsigned int cryptlen;
  
  	u8 *iv;
  
  	struct scatterlist *assoc;
  	struct scatterlist *src;
  	struct scatterlist *dst;
  
  	void *__ctx[] CRYPTO_MINALIGN_ATTR;
  };

  struct blkcipher_desc {
  	struct crypto_blkcipher *tfm;
  	void *info;
  	u32 flags;
  };

  struct cipher_desc {
  	struct crypto_tfm *tfm;

  	void (*crfn)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);

  	unsigned int (*prfn)(const struct cipher_desc *desc, u8 *dst,
  			     const u8 *src, unsigned int nbytes);
  	void *info;
  };

  struct hash_desc {
  	struct crypto_hash *tfm;
  	u32 flags;
  };

  /*
   * Algorithms: modular crypto algorithm implementations, managed
   * via crypto_register_alg() and crypto_unregister_alg().
   */

  struct ablkcipher_alg {
  	int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
  	              unsigned int keylen);
  	int (*encrypt)(struct ablkcipher_request *req);
  	int (*decrypt)(struct ablkcipher_request *req);

  	int (*givencrypt)(struct skcipher_givcrypt_request *req);
  	int (*givdecrypt)(struct skcipher_givcrypt_request *req);

  	const char *geniv;

  	unsigned int min_keysize;
  	unsigned int max_keysize;
  	unsigned int ivsize;
  };

  struct aead_alg {
  	int (*setkey)(struct crypto_aead *tfm, const u8 *key,
  	              unsigned int keylen);

  	int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize);

  	int (*encrypt)(struct aead_request *req);
  	int (*decrypt)(struct aead_request *req);

  	int (*givencrypt)(struct aead_givcrypt_request *req);
  	int (*givdecrypt)(struct aead_givcrypt_request *req);

  	const char *geniv;

  	unsigned int ivsize;

  	unsigned int maxauthsize;

  };

  struct blkcipher_alg {
  	int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
  	              unsigned int keylen);
  	int (*encrypt)(struct blkcipher_desc *desc,
  		       struct scatterlist *dst, struct scatterlist *src,
  		       unsigned int nbytes);
  	int (*decrypt)(struct blkcipher_desc *desc,
  		       struct scatterlist *dst, struct scatterlist *src,
  		       unsigned int nbytes);

  	const char *geniv;

  	unsigned int min_keysize;
  	unsigned int max_keysize;
  	unsigned int ivsize;
  };

  struct cipher_alg {
  	unsigned int cia_min_keysize;
  	unsigned int cia_max_keysize;

  	int (*cia_setkey)(struct crypto_tfm *tfm, const u8 *key,

  	                  unsigned int keylen);

  	void (*cia_encrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
  	void (*cia_decrypt)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);

  };

  struct compress_alg {

  	int (*coa_compress)(struct crypto_tfm *tfm, const u8 *src,
  			    unsigned int slen, u8 *dst, unsigned int *dlen);
  	int (*coa_decompress)(struct crypto_tfm *tfm, const u8 *src,
  			      unsigned int slen, u8 *dst, unsigned int *dlen);

  };

  struct rng_alg {
  	int (*rng_make_random)(struct crypto_rng *tfm, u8 *rdata,
  			       unsigned int dlen);
  	int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
  
  	unsigned int seedsize;
  };

  #define cra_ablkcipher	cra_u.ablkcipher

  #define cra_aead	cra_u.aead

  #define cra_blkcipher	cra_u.blkcipher

  #define cra_cipher	cra_u.cipher

  #define cra_compress	cra_u.compress

  #define cra_rng		cra_u.rng

  
  struct crypto_alg {
  	struct list_head cra_list;

  	struct list_head cra_users;

  	u32 cra_flags;
  	unsigned int cra_blocksize;
  	unsigned int cra_ctxsize;

  	unsigned int cra_alignmask;

  
  	int cra_priority;

  	atomic_t cra_refcnt;

  	char cra_name[CRYPTO_MAX_ALG_NAME];
  	char cra_driver_name[CRYPTO_MAX_ALG_NAME];

  	const struct crypto_type *cra_type;

  	union {

  		struct ablkcipher_alg ablkcipher;

  		struct aead_alg aead;

  		struct blkcipher_alg blkcipher;

  		struct cipher_alg cipher;

  		struct compress_alg compress;

  		struct rng_alg rng;

  	} cra_u;

  
  	int (*cra_init)(struct crypto_tfm *tfm);
  	void (*cra_exit)(struct crypto_tfm *tfm);

  	void (*cra_destroy)(struct crypto_alg *alg);

  	
  	struct module *cra_module;
  };
  
  /*
   * Algorithm registration interface.
   */
  int crypto_register_alg(struct crypto_alg *alg);
  int crypto_unregister_alg(struct crypto_alg *alg);
  
  /*
   * Algorithm query interface.
   */

  int crypto_has_alg(const char *name, u32 type, u32 mask);

  
  /*
   * Transforms: user-instantiated objects which encapsulate algorithms

   * and core processing logic.  Managed via crypto_alloc_*() and
   * crypto_free_*(), as well as the various helpers below.

   */

  struct ablkcipher_tfm {
  	int (*setkey)(struct crypto_ablkcipher *tfm, const u8 *key,
  	              unsigned int keylen);
  	int (*encrypt)(struct ablkcipher_request *req);
  	int (*decrypt)(struct ablkcipher_request *req);

  	int (*givencrypt)(struct skcipher_givcrypt_request *req);
  	int (*givdecrypt)(struct skcipher_givcrypt_request *req);

  	struct crypto_ablkcipher *base;

  	unsigned int ivsize;
  	unsigned int reqsize;
  };

  struct aead_tfm {
  	int (*setkey)(struct crypto_aead *tfm, const u8 *key,
  	              unsigned int keylen);
  	int (*encrypt)(struct aead_request *req);
  	int (*decrypt)(struct aead_request *req);

  	int (*givencrypt)(struct aead_givcrypt_request *req);
  	int (*givdecrypt)(struct aead_givcrypt_request *req);

  
  	struct crypto_aead *base;

  	unsigned int ivsize;
  	unsigned int authsize;
  	unsigned int reqsize;
  };

  struct blkcipher_tfm {
  	void *iv;
  	int (*setkey)(struct crypto_tfm *tfm, const u8 *key,
  		      unsigned int keylen);
  	int (*encrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
  		       struct scatterlist *src, unsigned int nbytes);
  	int (*decrypt)(struct blkcipher_desc *desc, struct scatterlist *dst,
  		       struct scatterlist *src, unsigned int nbytes);
  };

  struct cipher_tfm {

  	int (*cit_setkey)(struct crypto_tfm *tfm,
  	                  const u8 *key, unsigned int keylen);

  	void (*cit_encrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);
  	void (*cit_decrypt_one)(struct crypto_tfm *tfm, u8 *dst, const u8 *src);

  };

  struct hash_tfm {
  	int (*init)(struct hash_desc *desc);
  	int (*update)(struct hash_desc *desc,
  		      struct scatterlist *sg, unsigned int nsg);
  	int (*final)(struct hash_desc *desc, u8 *out);
  	int (*digest)(struct hash_desc *desc, struct scatterlist *sg,
  		      unsigned int nsg, u8 *out);
  	int (*setkey)(struct crypto_hash *tfm, const u8 *key,
  		      unsigned int keylen);

  	unsigned int digestsize;

  };
  
  struct compress_tfm {
  	int (*cot_compress)(struct crypto_tfm *tfm,
  	                    const u8 *src, unsigned int slen,
  	                    u8 *dst, unsigned int *dlen);
  	int (*cot_decompress)(struct crypto_tfm *tfm,
  	                      const u8 *src, unsigned int slen,
  	                      u8 *dst, unsigned int *dlen);
  };

  struct rng_tfm {
  	int (*rng_gen_random)(struct crypto_rng *tfm, u8 *rdata,
  			      unsigned int dlen);
  	int (*rng_reset)(struct crypto_rng *tfm, u8 *seed, unsigned int slen);
  };

  #define crt_ablkcipher	crt_u.ablkcipher

  #define crt_aead	crt_u.aead

  #define crt_blkcipher	crt_u.blkcipher

  #define crt_cipher	crt_u.cipher

  #define crt_hash	crt_u.hash

  #define crt_compress	crt_u.compress

  #define crt_rng		crt_u.rng

  
  struct crypto_tfm {
  
  	u32 crt_flags;
  	
  	union {

  		struct ablkcipher_tfm ablkcipher;

  		struct aead_tfm aead;

  		struct blkcipher_tfm blkcipher;

  		struct cipher_tfm cipher;

  		struct hash_tfm hash;

  		struct compress_tfm compress;

  		struct rng_tfm rng;

  	} crt_u;

  
  	void (*exit)(struct crypto_tfm *tfm);

  	
  	struct crypto_alg *__crt_alg;

  	void *__crt_ctx[] CRYPTO_MINALIGN_ATTR;

  };

  struct crypto_ablkcipher {
  	struct crypto_tfm base;
  };

  struct crypto_aead {
  	struct crypto_tfm base;
  };

  struct crypto_blkcipher {
  	struct crypto_tfm base;
  };

  struct crypto_cipher {
  	struct crypto_tfm base;
  };
  
  struct crypto_comp {
  	struct crypto_tfm base;
  };

  struct crypto_hash {
  	struct crypto_tfm base;
  };

  struct crypto_rng {
  	struct crypto_tfm base;
  };

  enum {
  	CRYPTOA_UNSPEC,
  	CRYPTOA_ALG,

  	CRYPTOA_TYPE,

  	CRYPTOA_U32,

  	__CRYPTOA_MAX,

  };

  #define CRYPTOA_MAX (__CRYPTOA_MAX - 1)

  /* Maximum number of (rtattr) parameters for each template. */
  #define CRYPTO_MAX_ATTRS 32

  struct crypto_attr_alg {
  	char name[CRYPTO_MAX_ALG_NAME];
  };

  struct crypto_attr_type {
  	u32 type;
  	u32 mask;
  };

  struct crypto_attr_u32 {
  	u32 num;
  };

  /* 
   * Transform user interface.
   */
   

  struct crypto_tfm *crypto_alloc_base(const char *alg_name, u32 type, u32 mask);

  void crypto_destroy_tfm(void *mem, struct crypto_tfm *tfm);
  
  static inline void crypto_free_tfm(struct crypto_tfm *tfm)
  {
  	return crypto_destroy_tfm(tfm, tfm);
  }

  int alg_test(const char *driver, const char *alg, u32 type, u32 mask);

  /*
   * Transform helpers which query the underlying algorithm.
   */
  static inline const char *crypto_tfm_alg_name(struct crypto_tfm *tfm)
  {
  	return tfm->__crt_alg->cra_name;
  }

  static inline const char *crypto_tfm_alg_driver_name(struct crypto_tfm *tfm)
  {
  	return tfm->__crt_alg->cra_driver_name;
  }
  
  static inline int crypto_tfm_alg_priority(struct crypto_tfm *tfm)
  {
  	return tfm->__crt_alg->cra_priority;
  }

  static inline u32 crypto_tfm_alg_type(struct crypto_tfm *tfm)
  {
  	return tfm->__crt_alg->cra_flags & CRYPTO_ALG_TYPE_MASK;
  }

  static inline unsigned int crypto_tfm_alg_blocksize(struct crypto_tfm *tfm)
  {
  	return tfm->__crt_alg->cra_blocksize;
  }

  static inline unsigned int crypto_tfm_alg_alignmask(struct crypto_tfm *tfm)
  {
  	return tfm->__crt_alg->cra_alignmask;
  }

  static inline u32 crypto_tfm_get_flags(struct crypto_tfm *tfm)
  {
  	return tfm->crt_flags;
  }
  
  static inline void crypto_tfm_set_flags(struct crypto_tfm *tfm, u32 flags)
  {
  	tfm->crt_flags |= flags;
  }
  
  static inline void crypto_tfm_clear_flags(struct crypto_tfm *tfm, u32 flags)
  {
  	tfm->crt_flags &= ~flags;
  }

  static inline void *crypto_tfm_ctx(struct crypto_tfm *tfm)
  {

  	return tfm->__crt_ctx;
  }
  
  static inline unsigned int crypto_tfm_ctx_alignment(void)
  {
  	struct crypto_tfm *tfm;
  	return __alignof__(tfm->__crt_ctx);

  }

  /*
   * API wrappers.
   */

  static inline struct crypto_ablkcipher *__crypto_ablkcipher_cast(
  	struct crypto_tfm *tfm)
  {
  	return (struct crypto_ablkcipher *)tfm;
  }

  static inline u32 crypto_skcipher_type(u32 type)

  {

  	type &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);

  	type |= CRYPTO_ALG_TYPE_BLKCIPHER;

  	return type;
  }
  
  static inline u32 crypto_skcipher_mask(u32 mask)
  {

  	mask &= ~(CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_GENIV);

  	mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK;

  	return mask;
  }

  struct crypto_ablkcipher *crypto_alloc_ablkcipher(const char *alg_name,
  						  u32 type, u32 mask);

  
  static inline struct crypto_tfm *crypto_ablkcipher_tfm(
  	struct crypto_ablkcipher *tfm)
  {
  	return &tfm->base;
  }
  
  static inline void crypto_free_ablkcipher(struct crypto_ablkcipher *tfm)
  {
  	crypto_free_tfm(crypto_ablkcipher_tfm(tfm));
  }
  
  static inline int crypto_has_ablkcipher(const char *alg_name, u32 type,
  					u32 mask)
  {

  	return crypto_has_alg(alg_name, crypto_skcipher_type(type),
  			      crypto_skcipher_mask(mask));

  }
  
  static inline struct ablkcipher_tfm *crypto_ablkcipher_crt(
  	struct crypto_ablkcipher *tfm)
  {
  	return &crypto_ablkcipher_tfm(tfm)->crt_ablkcipher;
  }
  
  static inline unsigned int crypto_ablkcipher_ivsize(
  	struct crypto_ablkcipher *tfm)
  {
  	return crypto_ablkcipher_crt(tfm)->ivsize;
  }
  
  static inline unsigned int crypto_ablkcipher_blocksize(
  	struct crypto_ablkcipher *tfm)
  {
  	return crypto_tfm_alg_blocksize(crypto_ablkcipher_tfm(tfm));
  }
  
  static inline unsigned int crypto_ablkcipher_alignmask(
  	struct crypto_ablkcipher *tfm)
  {
  	return crypto_tfm_alg_alignmask(crypto_ablkcipher_tfm(tfm));
  }
  
  static inline u32 crypto_ablkcipher_get_flags(struct crypto_ablkcipher *tfm)
  {
  	return crypto_tfm_get_flags(crypto_ablkcipher_tfm(tfm));
  }
  
  static inline void crypto_ablkcipher_set_flags(struct crypto_ablkcipher *tfm,
  					       u32 flags)
  {
  	crypto_tfm_set_flags(crypto_ablkcipher_tfm(tfm), flags);
  }
  
  static inline void crypto_ablkcipher_clear_flags(struct crypto_ablkcipher *tfm,
  						 u32 flags)
  {
  	crypto_tfm_clear_flags(crypto_ablkcipher_tfm(tfm), flags);
  }
  
  static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
  					   const u8 *key, unsigned int keylen)
  {

  	struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm);
  
  	return crt->setkey(crt->base, key, keylen);

  }
  
  static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
  	struct ablkcipher_request *req)
  {
  	return __crypto_ablkcipher_cast(req->base.tfm);
  }
  
  static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
  {
  	struct ablkcipher_tfm *crt =
  		crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
  	return crt->encrypt(req);
  }
  
  static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
  {
  	struct ablkcipher_tfm *crt =
  		crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
  	return crt->decrypt(req);
  }

  static inline unsigned int crypto_ablkcipher_reqsize(
  	struct crypto_ablkcipher *tfm)

  {
  	return crypto_ablkcipher_crt(tfm)->reqsize;
  }

  static inline void ablkcipher_request_set_tfm(
  	struct ablkcipher_request *req, struct crypto_ablkcipher *tfm)
  {

  	req->base.tfm = crypto_ablkcipher_tfm(crypto_ablkcipher_crt(tfm)->base);

  }

  static inline struct ablkcipher_request *ablkcipher_request_cast(
  	struct crypto_async_request *req)
  {
  	return container_of(req, struct ablkcipher_request, base);
  }

  static inline struct ablkcipher_request *ablkcipher_request_alloc(
  	struct crypto_ablkcipher *tfm, gfp_t gfp)
  {
  	struct ablkcipher_request *req;
  
  	req = kmalloc(sizeof(struct ablkcipher_request) +
  		      crypto_ablkcipher_reqsize(tfm), gfp);
  
  	if (likely(req))

  		ablkcipher_request_set_tfm(req, tfm);

  
  	return req;
  }
  
  static inline void ablkcipher_request_free(struct ablkcipher_request *req)
  {

  	kzfree(req);

  }
  
  static inline void ablkcipher_request_set_callback(
  	struct ablkcipher_request *req,
  	u32 flags, crypto_completion_t complete, void *data)
  {
  	req->base.complete = complete;
  	req->base.data = data;
  	req->base.flags = flags;
  }
  
  static inline void ablkcipher_request_set_crypt(
  	struct ablkcipher_request *req,
  	struct scatterlist *src, struct scatterlist *dst,
  	unsigned int nbytes, void *iv)
  {
  	req->src = src;
  	req->dst = dst;
  	req->nbytes = nbytes;
  	req->info = iv;
  }

  static inline struct crypto_aead *__crypto_aead_cast(struct crypto_tfm *tfm)
  {
  	return (struct crypto_aead *)tfm;
  }

  struct crypto_aead *crypto_alloc_aead(const char *alg_name, u32 type, u32 mask);

  
  static inline struct crypto_tfm *crypto_aead_tfm(struct crypto_aead *tfm)
  {
  	return &tfm->base;
  }
  
  static inline void crypto_free_aead(struct crypto_aead *tfm)
  {
  	crypto_free_tfm(crypto_aead_tfm(tfm));
  }
  
  static inline struct aead_tfm *crypto_aead_crt(struct crypto_aead *tfm)
  {
  	return &crypto_aead_tfm(tfm)->crt_aead;
  }
  
  static inline unsigned int crypto_aead_ivsize(struct crypto_aead *tfm)
  {
  	return crypto_aead_crt(tfm)->ivsize;
  }
  
  static inline unsigned int crypto_aead_authsize(struct crypto_aead *tfm)
  {
  	return crypto_aead_crt(tfm)->authsize;
  }
  
  static inline unsigned int crypto_aead_blocksize(struct crypto_aead *tfm)
  {
  	return crypto_tfm_alg_blocksize(crypto_aead_tfm(tfm));
  }
  
  static inline unsigned int crypto_aead_alignmask(struct crypto_aead *tfm)
  {
  	return crypto_tfm_alg_alignmask(crypto_aead_tfm(tfm));
  }
  
  static inline u32 crypto_aead_get_flags(struct crypto_aead *tfm)
  {
  	return crypto_tfm_get_flags(crypto_aead_tfm(tfm));
  }
  
  static inline void crypto_aead_set_flags(struct crypto_aead *tfm, u32 flags)
  {
  	crypto_tfm_set_flags(crypto_aead_tfm(tfm), flags);
  }
  
  static inline void crypto_aead_clear_flags(struct crypto_aead *tfm, u32 flags)
  {
  	crypto_tfm_clear_flags(crypto_aead_tfm(tfm), flags);
  }
  
  static inline int crypto_aead_setkey(struct crypto_aead *tfm, const u8 *key,
  				     unsigned int keylen)
  {

  	struct aead_tfm *crt = crypto_aead_crt(tfm);
  
  	return crt->setkey(crt->base, key, keylen);

  }

  int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize);

  static inline struct crypto_aead *crypto_aead_reqtfm(struct aead_request *req)
  {
  	return __crypto_aead_cast(req->base.tfm);
  }
  
  static inline int crypto_aead_encrypt(struct aead_request *req)
  {
  	return crypto_aead_crt(crypto_aead_reqtfm(req))->encrypt(req);
  }
  
  static inline int crypto_aead_decrypt(struct aead_request *req)
  {
  	return crypto_aead_crt(crypto_aead_reqtfm(req))->decrypt(req);
  }

  static inline unsigned int crypto_aead_reqsize(struct crypto_aead *tfm)

  {
  	return crypto_aead_crt(tfm)->reqsize;
  }
  
  static inline void aead_request_set_tfm(struct aead_request *req,
  					struct crypto_aead *tfm)
  {

  	req->base.tfm = crypto_aead_tfm(crypto_aead_crt(tfm)->base);

  }
  
  static inline struct aead_request *aead_request_alloc(struct crypto_aead *tfm,
  						      gfp_t gfp)
  {
  	struct aead_request *req;
  
  	req = kmalloc(sizeof(*req) + crypto_aead_reqsize(tfm), gfp);
  
  	if (likely(req))
  		aead_request_set_tfm(req, tfm);
  
  	return req;
  }
  
  static inline void aead_request_free(struct aead_request *req)
  {

  	kzfree(req);

  }
  
  static inline void aead_request_set_callback(struct aead_request *req,
  					     u32 flags,
  					     crypto_completion_t complete,
  					     void *data)
  {
  	req->base.complete = complete;
  	req->base.data = data;
  	req->base.flags = flags;
  }
  
  static inline void aead_request_set_crypt(struct aead_request *req,
  					  struct scatterlist *src,
  					  struct scatterlist *dst,
  					  unsigned int cryptlen, u8 *iv)
  {
  	req->src = src;
  	req->dst = dst;
  	req->cryptlen = cryptlen;
  	req->iv = iv;
  }
  
  static inline void aead_request_set_assoc(struct aead_request *req,
  					  struct scatterlist *assoc,
  					  unsigned int assoclen)
  {
  	req->assoc = assoc;
  	req->assoclen = assoclen;
  }

  static inline struct crypto_blkcipher *__crypto_blkcipher_cast(
  	struct crypto_tfm *tfm)
  {
  	return (struct crypto_blkcipher *)tfm;
  }
  
  static inline struct crypto_blkcipher *crypto_blkcipher_cast(
  	struct crypto_tfm *tfm)
  {
  	BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_BLKCIPHER);
  	return __crypto_blkcipher_cast(tfm);
  }
  
  static inline struct crypto_blkcipher *crypto_alloc_blkcipher(
  	const char *alg_name, u32 type, u32 mask)
  {

  	type &= ~CRYPTO_ALG_TYPE_MASK;

  	type |= CRYPTO_ALG_TYPE_BLKCIPHER;

  	mask |= CRYPTO_ALG_TYPE_MASK;

  
  	return __crypto_blkcipher_cast(crypto_alloc_base(alg_name, type, mask));
  }
  
  static inline struct crypto_tfm *crypto_blkcipher_tfm(
  	struct crypto_blkcipher *tfm)
  {
  	return &tfm->base;
  }
  
  static inline void crypto_free_blkcipher(struct crypto_blkcipher *tfm)
  {
  	crypto_free_tfm(crypto_blkcipher_tfm(tfm));
  }

  static inline int crypto_has_blkcipher(const char *alg_name, u32 type, u32 mask)
  {

  	type &= ~CRYPTO_ALG_TYPE_MASK;

  	type |= CRYPTO_ALG_TYPE_BLKCIPHER;

  	mask |= CRYPTO_ALG_TYPE_MASK;

  
  	return crypto_has_alg(alg_name, type, mask);
  }

  static inline const char *crypto_blkcipher_name(struct crypto_blkcipher *tfm)
  {
  	return crypto_tfm_alg_name(crypto_blkcipher_tfm(tfm));
  }
  
  static inline struct blkcipher_tfm *crypto_blkcipher_crt(
  	struct crypto_blkcipher *tfm)
  {
  	return &crypto_blkcipher_tfm(tfm)->crt_blkcipher;
  }
  
  static inline struct blkcipher_alg *crypto_blkcipher_alg(
  	struct crypto_blkcipher *tfm)
  {
  	return &crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher;
  }
  
  static inline unsigned int crypto_blkcipher_ivsize(struct crypto_blkcipher *tfm)
  {
  	return crypto_blkcipher_alg(tfm)->ivsize;
  }
  
  static inline unsigned int crypto_blkcipher_blocksize(
  	struct crypto_blkcipher *tfm)
  {
  	return crypto_tfm_alg_blocksize(crypto_blkcipher_tfm(tfm));
  }
  
  static inline unsigned int crypto_blkcipher_alignmask(
  	struct crypto_blkcipher *tfm)
  {
  	return crypto_tfm_alg_alignmask(crypto_blkcipher_tfm(tfm));
  }
  
  static inline u32 crypto_blkcipher_get_flags(struct crypto_blkcipher *tfm)
  {
  	return crypto_tfm_get_flags(crypto_blkcipher_tfm(tfm));
  }
  
  static inline void crypto_blkcipher_set_flags(struct crypto_blkcipher *tfm,
  					      u32 flags)
  {
  	crypto_tfm_set_flags(crypto_blkcipher_tfm(tfm), flags);
  }
  
  static inline void crypto_blkcipher_clear_flags(struct crypto_blkcipher *tfm,
  						u32 flags)
  {
  	crypto_tfm_clear_flags(crypto_blkcipher_tfm(tfm), flags);
  }
  
  static inline int crypto_blkcipher_setkey(struct crypto_blkcipher *tfm,
  					  const u8 *key, unsigned int keylen)
  {
  	return crypto_blkcipher_crt(tfm)->setkey(crypto_blkcipher_tfm(tfm),
  						 key, keylen);
  }
  
  static inline int crypto_blkcipher_encrypt(struct blkcipher_desc *desc,
  					   struct scatterlist *dst,
  					   struct scatterlist *src,
  					   unsigned int nbytes)
  {
  	desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
  	return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
  }
  
  static inline int crypto_blkcipher_encrypt_iv(struct blkcipher_desc *desc,
  					      struct scatterlist *dst,
  					      struct scatterlist *src,
  					      unsigned int nbytes)
  {
  	return crypto_blkcipher_crt(desc->tfm)->encrypt(desc, dst, src, nbytes);
  }
  
  static inline int crypto_blkcipher_decrypt(struct blkcipher_desc *desc,
  					   struct scatterlist *dst,
  					   struct scatterlist *src,
  					   unsigned int nbytes)
  {
  	desc->info = crypto_blkcipher_crt(desc->tfm)->iv;
  	return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
  }
  
  static inline int crypto_blkcipher_decrypt_iv(struct blkcipher_desc *desc,
  					      struct scatterlist *dst,
  					      struct scatterlist *src,
  					      unsigned int nbytes)
  {
  	return crypto_blkcipher_crt(desc->tfm)->decrypt(desc, dst, src, nbytes);
  }
  
  static inline void crypto_blkcipher_set_iv(struct crypto_blkcipher *tfm,
  					   const u8 *src, unsigned int len)
  {
  	memcpy(crypto_blkcipher_crt(tfm)->iv, src, len);
  }
  
  static inline void crypto_blkcipher_get_iv(struct crypto_blkcipher *tfm,
  					   u8 *dst, unsigned int len)
  {
  	memcpy(dst, crypto_blkcipher_crt(tfm)->iv, len);
  }

  static inline struct crypto_cipher *__crypto_cipher_cast(struct crypto_tfm *tfm)
  {
  	return (struct crypto_cipher *)tfm;
  }
  
  static inline struct crypto_cipher *crypto_cipher_cast(struct crypto_tfm *tfm)
  {
  	BUG_ON(crypto_tfm_alg_type(tfm) != CRYPTO_ALG_TYPE_CIPHER);
  	return __crypto_cipher_cast(tfm);
  }
  
  static inline struct crypto_cipher *crypto_alloc_cipher(const char *alg_name,
  							u32 type, u32 mask)
  {
  	type &= ~CRYPTO_ALG_TYPE_MASK;
  	type |= CRYPTO_ALG_TYPE_CIPHER;
  	mask |= CRYPTO_ALG_TYPE_MASK;
  
  	return __crypto_cipher_cast(crypto_alloc_base(alg_name, type, mask));
  }
  
  static inline struct crypto_tfm *crypto_cipher_tfm(struct crypto_cipher *tfm)
  {

  	return &tfm->base;

  }
  
  static inline void crypto_free_cipher(struct crypto_cipher *tfm)
  {
  	crypto_free_tfm(crypto_cipher_tfm(tfm));
  }

  static inline int crypto_has_cipher(const char *alg_name, u32 type, u32 mask)
  {
  	type &= ~CRYPTO_ALG_TYPE_MASK;
  	type |= CRYPTO_ALG_TYPE_CIPHER;
  	mask |= CRYPTO_ALG_TYPE_MASK;
  
  	return crypto_has_alg(alg_name, type, mask);
  }

  static inline struct cipher_tfm *crypto_cipher_crt(struct crypto_cipher *tfm)
  {
  	return &crypto_cipher_tfm(tfm)->crt_cipher;
  }
  
  static inline unsigned int crypto_cipher_blocksize(struct crypto_cipher *tfm)
  {
  	return crypto_tfm_alg_blocksize(crypto_cipher_tfm(tfm));
  }
  
  static inline unsigned int crypto_cipher_alignmask(struct crypto_cipher *tfm)
  {
  	return crypto_tfm_alg_alignmask(crypto_cipher_tfm(tfm));
  }
  
  static inline u32 crypto_cipher_get_flags(struct crypto_cipher *tfm)
  {
  	return crypto_tfm_get_flags(crypto_cipher_tfm(tfm));
  }
  
  static inline void crypto_cipher_set_flags(struct crypto_cipher *tfm,
  					   u32 flags)
  {
  	crypto_tfm_set_flags(crypto_cipher_tfm(tfm), flags);
  }
  
  static inline void crypto_cipher_clear_flags(struct crypto_cipher *tfm,
  					     u32 flags)
  {
  	crypto_tfm_clear_flags(crypto_cipher_tfm(tfm), flags);
  }

  static inline int crypto_cipher_setkey(struct crypto_cipher *tfm,
                                         const u8 *key, unsigned int keylen)
  {
  	return crypto_cipher_crt(tfm)->cit_setkey(crypto_cipher_tfm(tfm),
  						  key, keylen);
  }

  static inline void crypto_cipher_encrypt_one(struct crypto_cipher *tfm,
  					     u8 *dst, const u8 *src)
  {
  	crypto_cipher_crt(tfm)->cit_encrypt_one(crypto_cipher_tfm(tfm),
  						dst, src);
  }
  
  static inline void crypto_cipher_decrypt_one(struct crypto_cipher *tfm,
  					     u8 *dst, const u8 *src)
  {
  	crypto_cipher_crt(tfm)->cit_decrypt_one(crypto_cipher_tfm(tfm),
  						dst, src);
  }

  static inline struct crypto_hash *__crypto_hash_cast(struct crypto_tfm *tfm)

  {

  	return (struct crypto_hash *)tfm;

  }

  static inline struct crypto_hash *crypto_hash_cast(struct crypto_tfm *tfm)

  {

  	BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_HASH) &
  	       CRYPTO_ALG_TYPE_HASH_MASK);
  	return __crypto_hash_cast(tfm);

  }

  static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
  						    u32 type, u32 mask)

  {

  	type &= ~CRYPTO_ALG_TYPE_MASK;

  	mask &= ~CRYPTO_ALG_TYPE_MASK;

  	type |= CRYPTO_ALG_TYPE_HASH;
  	mask |= CRYPTO_ALG_TYPE_HASH_MASK;
  
  	return __crypto_hash_cast(crypto_alloc_base(alg_name, type, mask));

  }

  static inline struct crypto_tfm *crypto_hash_tfm(struct crypto_hash *tfm)

  {

  	return &tfm->base;
  }
  
  static inline void crypto_free_hash(struct crypto_hash *tfm)
  {
  	crypto_free_tfm(crypto_hash_tfm(tfm));
  }

  static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
  {
  	type &= ~CRYPTO_ALG_TYPE_MASK;

  	mask &= ~CRYPTO_ALG_TYPE_MASK;

  	type |= CRYPTO_ALG_TYPE_HASH;
  	mask |= CRYPTO_ALG_TYPE_HASH_MASK;
  
  	return crypto_has_alg(alg_name, type, mask);
  }

  static inline struct hash_tfm *crypto_hash_crt(struct crypto_hash *tfm)
  {
  	return &crypto_hash_tfm(tfm)->crt_hash;
  }
  
  static inline unsigned int crypto_hash_blocksize(struct crypto_hash *tfm)
  {
  	return crypto_tfm_alg_blocksize(crypto_hash_tfm(tfm));
  }
  
  static inline unsigned int crypto_hash_alignmask(struct crypto_hash *tfm)
  {
  	return crypto_tfm_alg_alignmask(crypto_hash_tfm(tfm));
  }
  
  static inline unsigned int crypto_hash_digestsize(struct crypto_hash *tfm)
  {
  	return crypto_hash_crt(tfm)->digestsize;
  }
  
  static inline u32 crypto_hash_get_flags(struct crypto_hash *tfm)
  {
  	return crypto_tfm_get_flags(crypto_hash_tfm(tfm));
  }
  
  static inline void crypto_hash_set_flags(struct crypto_hash *tfm, u32 flags)
  {
  	crypto_tfm_set_flags(crypto_hash_tfm(tfm), flags);
  }
  
  static inline void crypto_hash_clear_flags(struct crypto_hash *tfm, u32 flags)
  {
  	crypto_tfm_clear_flags(crypto_hash_tfm(tfm), flags);
  }
  
  static inline int crypto_hash_init(struct hash_desc *desc)
  {
  	return crypto_hash_crt(desc->tfm)->init(desc);
  }
  
  static inline int crypto_hash_update(struct hash_desc *desc,
  				     struct scatterlist *sg,
  				     unsigned int nbytes)
  {
  	return crypto_hash_crt(desc->tfm)->update(desc, sg, nbytes);
  }
  
  static inline int crypto_hash_final(struct hash_desc *desc, u8 *out)
  {
  	return crypto_hash_crt(desc->tfm)->final(desc, out);
  }
  
  static inline int crypto_hash_digest(struct hash_desc *desc,
  				     struct scatterlist *sg,
  				     unsigned int nbytes, u8 *out)
  {
  	return crypto_hash_crt(desc->tfm)->digest(desc, sg, nbytes, out);
  }
  
  static inline int crypto_hash_setkey(struct crypto_hash *hash,
  				     const u8 *key, unsigned int keylen)
  {
  	return crypto_hash_crt(hash)->setkey(hash, key, keylen);

  }

  static inline struct crypto_comp *__crypto_comp_cast(struct crypto_tfm *tfm)
  {
  	return (struct crypto_comp *)tfm;
  }
  
  static inline struct crypto_comp *crypto_comp_cast(struct crypto_tfm *tfm)
  {
  	BUG_ON((crypto_tfm_alg_type(tfm) ^ CRYPTO_ALG_TYPE_COMPRESS) &
  	       CRYPTO_ALG_TYPE_MASK);
  	return __crypto_comp_cast(tfm);
  }
  
  static inline struct crypto_comp *crypto_alloc_comp(const char *alg_name,
  						    u32 type, u32 mask)
  {
  	type &= ~CRYPTO_ALG_TYPE_MASK;
  	type |= CRYPTO_ALG_TYPE_COMPRESS;
  	mask |= CRYPTO_ALG_TYPE_MASK;
  
  	return __crypto_comp_cast(crypto_alloc_base(alg_name, type, mask));
  }
  
  static inline struct crypto_tfm *crypto_comp_tfm(struct crypto_comp *tfm)
  {

  	return &tfm->base;

  }
  
  static inline void crypto_free_comp(struct crypto_comp *tfm)
  {
  	crypto_free_tfm(crypto_comp_tfm(tfm));
  }
  
  static inline int crypto_has_comp(const char *alg_name, u32 type, u32 mask)
  {
  	type &= ~CRYPTO_ALG_TYPE_MASK;
  	type |= CRYPTO_ALG_TYPE_COMPRESS;
  	mask |= CRYPTO_ALG_TYPE_MASK;
  
  	return crypto_has_alg(alg_name, type, mask);
  }

  static inline const char *crypto_comp_name(struct crypto_comp *tfm)
  {
  	return crypto_tfm_alg_name(crypto_comp_tfm(tfm));
  }

  static inline struct compress_tfm *crypto_comp_crt(struct crypto_comp *tfm)
  {
  	return &crypto_comp_tfm(tfm)->crt_compress;
  }
  
  static inline int crypto_comp_compress(struct crypto_comp *tfm,

                                         const u8 *src, unsigned int slen,
                                         u8 *dst, unsigned int *dlen)
  {

  	return crypto_comp_crt(tfm)->cot_compress(crypto_comp_tfm(tfm),
  						  src, slen, dst, dlen);

  }

  static inline int crypto_comp_decompress(struct crypto_comp *tfm,

                                           const u8 *src, unsigned int slen,
                                           u8 *dst, unsigned int *dlen)
  {

  	return crypto_comp_crt(tfm)->cot_decompress(crypto_comp_tfm(tfm),
  						    src, slen, dst, dlen);

  }

  #endif	/* _LINUX_CRYPTO_H */