/*
   * Cryptographic API.
   *
   * Partial (de)compression operations.
   *
   * Copyright 2008 Sony Corporation
   *
   * 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; version 2 of the License.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program.
   * If not, see <http://www.gnu.org/licenses/>.
   */
  
  #include <linux/crypto.h>
  #include <linux/errno.h>
  #include <linux/module.h>
  #include <linux/seq_file.h>
  #include <linux/string.h>

  #include <linux/cryptouser.h>
  #include <net/netlink.h>

  
  #include <crypto/compress.h>

  #include <crypto/internal/compress.h>

  
  #include "internal.h"
  
  
  static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
  {
  	return 0;
  }

  static unsigned int crypto_pcomp_extsize(struct crypto_alg *alg)

  {
  	return alg->cra_ctxsize;
  }

  static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)

  {
  	return 0;
  }

  #ifdef CONFIG_NET

  static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
  {
  	struct crypto_report_comp rpcomp;
  
  	snprintf(rpcomp.type, CRYPTO_MAX_ALG_NAME, "%s", "pcomp");
  
  	NLA_PUT(skb, CRYPTOCFGA_REPORT_COMPRESS,
  		sizeof(struct crypto_report_comp), &rpcomp);
  
  	return 0;
  
  nla_put_failure:
  	return -EMSGSIZE;
  }

  #else
  static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
  {
  	return -ENOSYS;
  }
  #endif

  static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
  	__attribute__ ((unused));
  static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
  {
  	seq_printf(m, "type         : pcomp
  ");
  }
  
  static const struct crypto_type crypto_pcomp_type = {
  	.extsize	= crypto_pcomp_extsize,
  	.init		= crypto_pcomp_init,
  	.init_tfm	= crypto_pcomp_init_tfm,
  #ifdef CONFIG_PROC_FS
  	.show		= crypto_pcomp_show,
  #endif

  	.report		= crypto_pcomp_report,

  	.maskclear	= ~CRYPTO_ALG_TYPE_MASK,
  	.maskset	= CRYPTO_ALG_TYPE_MASK,
  	.type		= CRYPTO_ALG_TYPE_PCOMPRESS,
  	.tfmsize	= offsetof(struct crypto_pcomp, base),
  };
  
  struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
  					u32 mask)
  {
  	return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
  }
  EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
  
  int crypto_register_pcomp(struct pcomp_alg *alg)
  {
  	struct crypto_alg *base = &alg->base;
  
  	base->cra_type = &crypto_pcomp_type;
  	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
  	base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;
  
  	return crypto_register_alg(base);
  }
  EXPORT_SYMBOL_GPL(crypto_register_pcomp);
  
  int crypto_unregister_pcomp(struct pcomp_alg *alg)
  {
  	return crypto_unregister_alg(&alg->base);
  }
  EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
  
  MODULE_LICENSE("GPL");
  MODULE_DESCRIPTION("Partial (de)compression type");
  MODULE_AUTHOR("Sony Corporation");