Kconfig 4.1 KB

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  1. # SPDX-License-Identifier: GPL-2.0
  2. menu "Certificates for signature checking"
  3. config MODULE_SIG_KEY
  4. string "File name or PKCS#11 URI of module signing key"
  5. default "certs/signing_key.pem"
  6. depends on MODULE_SIG
  7. help
  8. Provide the file name of a private key/certificate in PEM format,
  9. or a PKCS#11 URI according to RFC7512. The file should contain, or
  10. the URI should identify, both the certificate and its corresponding
  11. private key.
  12. If this option is unchanged from its default "certs/signing_key.pem",
  13. then the kernel will automatically generate the private key and
  14. certificate as described in Documentation/admin-guide/module-signing.rst
  15. config SYSTEM_TRUSTED_KEYRING
  16. bool "Provide system-wide ring of trusted keys"
  17. depends on KEYS
  18. depends on ASYMMETRIC_KEY_TYPE
  19. help
  20. Provide a system keyring to which trusted keys can be added. Keys in
  21. the keyring are considered to be trusted. Keys may be added at will
  22. by the kernel from compiled-in data and from hardware key stores, but
  23. userspace may only add extra keys if those keys can be verified by
  24. keys already in the keyring.
  25. Keys in this keyring are used by module signature checking.
  26. config SYSTEM_TRUSTED_KEYS
  27. string "Additional X.509 keys for default system keyring"
  28. depends on SYSTEM_TRUSTED_KEYRING
  29. help
  30. If set, this option should be the filename of a PEM-formatted file
  31. containing trusted X.509 certificates to be included in the default
  32. system keyring. Any certificate used for module signing is implicitly
  33. also trusted.
  34. NOTE: If you previously provided keys for the system keyring in the
  35. form of DER-encoded *.x509 files in the top-level build directory,
  36. those are no longer used. You will need to set this option instead.
  37. config SYSTEM_EXTRA_CERTIFICATE
  38. bool "Reserve area for inserting a certificate without recompiling"
  39. depends on SYSTEM_TRUSTED_KEYRING
  40. help
  41. If set, space for an extra certificate will be reserved in the kernel
  42. image. This allows introducing a trusted certificate to the default
  43. system keyring without recompiling the kernel.
  44. config SYSTEM_EXTRA_CERTIFICATE_SIZE
  45. int "Number of bytes to reserve for the extra certificate"
  46. depends on SYSTEM_EXTRA_CERTIFICATE
  47. default 4096
  48. help
  49. This is the number of bytes reserved in the kernel image for a
  50. certificate to be inserted.
  51. config SECONDARY_TRUSTED_KEYRING
  52. bool "Provide a keyring to which extra trustable keys may be added"
  53. depends on SYSTEM_TRUSTED_KEYRING
  54. help
  55. If set, provide a keyring to which extra keys may be added, provided
  56. those keys are not blacklisted and are vouched for by a key built
  57. into the kernel or already in the secondary trusted keyring.
  58. config SYSTEM_BLACKLIST_KEYRING
  59. bool "Provide system-wide ring of blacklisted keys"
  60. depends on KEYS
  61. help
  62. Provide a system keyring to which blacklisted keys can be added.
  63. Keys in the keyring are considered entirely untrusted. Keys in this
  64. keyring are used by the module signature checking to reject loading
  65. of modules signed with a blacklisted key.
  66. config SYSTEM_BLACKLIST_HASH_LIST
  67. string "Hashes to be preloaded into the system blacklist keyring"
  68. depends on SYSTEM_BLACKLIST_KEYRING
  69. help
  70. If set, this option should be the filename of a list of hashes in the
  71. form "<hash>", "<hash>", ... . This will be included into a C
  72. wrapper to incorporate the list into the kernel. Each <hash> should
  73. be a string of hex digits.
  74. config SYSTEM_REVOCATION_LIST
  75. bool "Provide system-wide ring of revocation certificates"
  76. depends on SYSTEM_BLACKLIST_KEYRING
  77. depends on PKCS7_MESSAGE_PARSER=y
  78. help
  79. If set, this allows revocation certificates to be stored in the
  80. blacklist keyring and implements a hook whereby a PKCS#7 message can
  81. be checked to see if it matches such a certificate.
  82. config SYSTEM_REVOCATION_KEYS
  83. string "X.509 certificates to be preloaded into the system blacklist keyring"
  84. depends on SYSTEM_REVOCATION_LIST
  85. help
  86. If set, this option should be the filename of a PEM-formatted file
  87. containing X.509 certificates to be included in the default blacklist
  88. keyring.
  89. endmenu