kpp.c 2.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * Key-agreement Protocol Primitives (KPP)
  4. *
  5. * Copyright (c) 2016, Intel Corporation
  6. * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
  7. */
  8. #include <linux/errno.h>
  9. #include <linux/kernel.h>
  10. #include <linux/module.h>
  11. #include <linux/seq_file.h>
  12. #include <linux/slab.h>
  13. #include <linux/string.h>
  14. #include <linux/crypto.h>
  15. #include <crypto/algapi.h>
  16. #include <linux/cryptouser.h>
  17. #include <linux/compiler.h>
  18. #include <net/netlink.h>
  19. #include <crypto/kpp.h>
  20. #include <crypto/internal/kpp.h>
  21. #include "internal.h"
  22. #ifdef CONFIG_NET
  23. static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
  24. {
  25. struct crypto_report_kpp rkpp;
  26. memset(&rkpp, 0, sizeof(rkpp));
  27. strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
  28. return nla_put(skb, CRYPTOCFGA_REPORT_KPP, sizeof(rkpp), &rkpp);
  29. }
  30. #else
  31. static int crypto_kpp_report(struct sk_buff *skb, struct crypto_alg *alg)
  32. {
  33. return -ENOSYS;
  34. }
  35. #endif
  36. static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
  37. __maybe_unused;
  38. static void crypto_kpp_show(struct seq_file *m, struct crypto_alg *alg)
  39. {
  40. seq_puts(m, "type : kpp\n");
  41. }
  42. static void crypto_kpp_exit_tfm(struct crypto_tfm *tfm)
  43. {
  44. struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
  45. struct kpp_alg *alg = crypto_kpp_alg(kpp);
  46. alg->exit(kpp);
  47. }
  48. static int crypto_kpp_init_tfm(struct crypto_tfm *tfm)
  49. {
  50. struct crypto_kpp *kpp = __crypto_kpp_tfm(tfm);
  51. struct kpp_alg *alg = crypto_kpp_alg(kpp);
  52. if (alg->exit)
  53. kpp->base.exit = crypto_kpp_exit_tfm;
  54. if (alg->init)
  55. return alg->init(kpp);
  56. return 0;
  57. }
  58. static const struct crypto_type crypto_kpp_type = {
  59. .extsize = crypto_alg_extsize,
  60. .init_tfm = crypto_kpp_init_tfm,
  61. #ifdef CONFIG_PROC_FS
  62. .show = crypto_kpp_show,
  63. #endif
  64. .report = crypto_kpp_report,
  65. .maskclear = ~CRYPTO_ALG_TYPE_MASK,
  66. .maskset = CRYPTO_ALG_TYPE_MASK,
  67. .type = CRYPTO_ALG_TYPE_KPP,
  68. .tfmsize = offsetof(struct crypto_kpp, base),
  69. };
  70. struct crypto_kpp *crypto_alloc_kpp(const char *alg_name, u32 type, u32 mask)
  71. {
  72. return crypto_alloc_tfm(alg_name, &crypto_kpp_type, type, mask);
  73. }
  74. EXPORT_SYMBOL_GPL(crypto_alloc_kpp);
  75. static void kpp_prepare_alg(struct kpp_alg *alg)
  76. {
  77. struct crypto_alg *base = &alg->base;
  78. base->cra_type = &crypto_kpp_type;
  79. base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
  80. base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
  81. }
  82. int crypto_register_kpp(struct kpp_alg *alg)
  83. {
  84. struct crypto_alg *base = &alg->base;
  85. kpp_prepare_alg(alg);
  86. return crypto_register_alg(base);
  87. }
  88. EXPORT_SYMBOL_GPL(crypto_register_kpp);
  89. void crypto_unregister_kpp(struct kpp_alg *alg)
  90. {
  91. crypto_unregister_alg(&alg->base);
  92. }
  93. EXPORT_SYMBOL_GPL(crypto_unregister_kpp);
  94. MODULE_LICENSE("GPL");
  95. MODULE_DESCRIPTION("Key-agreement Protocol Primitives");