Eric Lee / smarc-fsl-linux-kernel

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crypto/kpp.c 2.96 KB
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4e5f2c400   Salvatore Benedetto   crypto: kpp - Key... 
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  /*
   * Key-agreement Protocol Primitives (KPP)
   *
   * Copyright (c) 2016, Intel Corporation
   * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
   *
   * 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.
   *
   */
  #include <linux/errno.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/seq_file.h>
  #include <linux/slab.h>
  #include <linux/string.h>
  #include <linux/crypto.h>
  #include <crypto/algapi.h>
  #include <linux/cryptouser.h>
d8c34b949   Gideon Israel Dsouza   crypto: Replaced ... 
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  #include <linux/compiler.h>
4e5f2c400   Salvatore Benedetto   crypto: kpp - Key... 
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  #include <net/netlink.h>
  #include <crypto/kpp.h>
  #include <crypto/internal/kpp.h>
  #include "internal.h"
  
  #ifdef CONFIG_NET
  static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
  {
  	struct crypto_report_kpp rkpp;
  
  	strncpy(rkpp.type, "kpp", sizeof(rkpp.type));
  
  	if (nla_put(skb, CRYPTOCFGA_REPORT_KPP,
  		    sizeof(struct crypto_report_kpp), &rkpp))
  		goto nla_put_failure;
  	return 0;
  
  nla_put_failure:
  	return -EMSGSIZE;
  }
  #else
  static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
  {
  	return -ENOSYS;
  }
  #endif
  
  static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
d8c34b949   Gideon Israel Dsouza   crypto: Replaced ... 
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  	__maybe_unused;
4e5f2c400   Salvatore Benedetto   crypto: kpp - Key... 
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  static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
  {
  	seq_puts(m, "type         : kpp
  ");
  }
  
  static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
  {
  	struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
  	struct kpp_alg *alg = crypto_kpp_alg(kpp);
  
  	alg->exit(kpp);
  }
  
  static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
  {
  	struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
  	struct kpp_alg *alg = crypto_kpp_alg(kpp);
  
  	if (alg->exit)
  		kpp->base.exit = crypto_kpp_exit_tfm;
  
  	if (alg->init)
  		return alg->init(kpp);
  
  	return 0;
  }
  
  static const struct crypto_type crypto_kpp_type = {
  	.extsize = crypto_alg_extsize,
  	.init_tfm = crypto_kpp_init_tfm,
  #ifdef CONFIG_PROC_FS
  	.show = crypto_kpp_show,
  #endif
  	.report = crypto_kpp_report,
  	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
  	.maskset = CRYPTO_ALG_TYPE_MASK,
  	.type = CRYPTO_ALG_TYPE_KPP,
  	.tfmsize = offsetof(struct crypto_kpp, base),
  };
  
  struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
  {
  	return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
  }
  EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
  
  static void kpp_prepare_alg(struct kpp_alg *alg)
  {
  	struct crypto_alg *base = &alg->base;
  
  	base->cra_type = &crypto_kpp_type;
  	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
  	base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
  }
  
  int crypto_register_kpp(struct kpp_alg *alg)
  {
  	struct crypto_alg *base = &alg->base;
  
  	kpp_prepare_alg(alg);
  	return crypto_register_alg(base);
  }
  EXPORT_SYMBOL_GPL(crypto_register_kpp);
  
  void crypto_unregister_kpp(struct kpp_alg *alg)
  {
  	crypto_unregister_alg(&alg->base);
  }
  EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
  
  MODULE_LICENSE("GPL");
  MODULE_DESCRIPTION("Key-agreement Protocol Primitives");