1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 266dbc325SMimi Zoharconfig EVM 36341e62bSChristoph Jaeger bool "EVM support" 4a3aef94bSDmitry Kasatkin select KEYS 5a3aef94bSDmitry Kasatkin select ENCRYPTED_KEYS 666dbc325SMimi Zohar select CRYPTO_HMAC 766dbc325SMimi Zohar select CRYPTO_SHA1 85feeb611SMatthew Garrett select CRYPTO_HASH_INFO 966dbc325SMimi Zohar default n 1066dbc325SMimi Zohar help 1166dbc325SMimi Zohar EVM protects a file's security extended attributes against 1266dbc325SMimi Zohar integrity attacks. 1366dbc325SMimi Zohar 1466dbc325SMimi Zohar If you are unsure how to answer this question, answer N. 1574de6684SDmitry Kasatkin 16d3b33679SDmitry Kasatkinconfig EVM_ATTR_FSUUID 17d3b33679SDmitry Kasatkin bool "FSUUID (version 2)" 18d3b33679SDmitry Kasatkin default y 1974de6684SDmitry Kasatkin depends on EVM 2074de6684SDmitry Kasatkin help 21d3b33679SDmitry Kasatkin Include filesystem UUID for HMAC calculation. 22d3b33679SDmitry Kasatkin 23d3b33679SDmitry Kasatkin Default value is 'selected', which is former version 2. 24d3b33679SDmitry Kasatkin if 'not selected', it is former version 1 2574de6684SDmitry Kasatkin 2674de6684SDmitry Kasatkin WARNING: changing the HMAC calculation method or adding 2774de6684SDmitry Kasatkin additional info to the calculation, requires existing EVM 2874de6684SDmitry Kasatkin labeled file systems to be relabeled. 29d3b33679SDmitry Kasatkin 303e38df56SDmitry Kasatkinconfig EVM_EXTRA_SMACK_XATTRS 313e38df56SDmitry Kasatkin bool "Additional SMACK xattrs" 323e38df56SDmitry Kasatkin depends on EVM && SECURITY_SMACK 333e38df56SDmitry Kasatkin default n 343e38df56SDmitry Kasatkin help 353e38df56SDmitry Kasatkin Include additional SMACK xattrs for HMAC calculation. 363e38df56SDmitry Kasatkin 373e38df56SDmitry Kasatkin In addition to the original security xattrs (eg. security.selinux, 383e38df56SDmitry Kasatkin security.SMACK64, security.capability, and security.ima) included 393e38df56SDmitry Kasatkin in the HMAC calculation, enabling this option includes newly defined 403e38df56SDmitry Kasatkin Smack xattrs: security.SMACK64EXEC, security.SMACK64TRANSMUTE and 413e38df56SDmitry Kasatkin security.SMACK64MMAP. 423e38df56SDmitry Kasatkin 433e38df56SDmitry Kasatkin WARNING: changing the HMAC calculation method or adding 443e38df56SDmitry Kasatkin additional info to the calculation, requires existing EVM 453e38df56SDmitry Kasatkin labeled file systems to be relabeled. 463e38df56SDmitry Kasatkin 47fa516b66SMatthew Garrettconfig EVM_ADD_XATTRS 48fa516b66SMatthew Garrett bool "Add additional EVM extended attributes at runtime" 49fa516b66SMatthew Garrett depends on EVM 50fa516b66SMatthew Garrett default n 51fa516b66SMatthew Garrett help 52fa516b66SMatthew Garrett Allow userland to provide additional xattrs for HMAC calculation. 53fa516b66SMatthew Garrett 54fa516b66SMatthew Garrett When this option is enabled, root can add additional xattrs to the 55fa516b66SMatthew Garrett list used by EVM by writing them into 56fa516b66SMatthew Garrett /sys/kernel/security/integrity/evm/evm_xattrs. 57fa516b66SMatthew Garrett 582ce523ebSDmitry Kasatkinconfig EVM_LOAD_X509 592ce523ebSDmitry Kasatkin bool "Load an X509 certificate onto the '.evm' trusted keyring" 6005d3884bSArnd Bergmann depends on EVM && INTEGRITY_TRUSTED_KEYRING 612ce523ebSDmitry Kasatkin default n 622ce523ebSDmitry Kasatkin help 632ce523ebSDmitry Kasatkin Load an X509 certificate onto the '.evm' trusted keyring. 642ce523ebSDmitry Kasatkin 652ce523ebSDmitry Kasatkin This option enables X509 certificate loading from the kernel 662ce523ebSDmitry Kasatkin onto the '.evm' trusted keyring. A public key can be used to 67*90f6f691SEric Snowberg verify EVM integrity starting from the 'init' process. The 68*90f6f691SEric Snowberg key must have digitalSignature usage set. 692ce523ebSDmitry Kasatkin 702ce523ebSDmitry Kasatkinconfig EVM_X509_PATH 712ce523ebSDmitry Kasatkin string "EVM X509 certificate path" 722ce523ebSDmitry Kasatkin depends on EVM_LOAD_X509 732ce523ebSDmitry Kasatkin default "/etc/keys/x509_evm.der" 742ce523ebSDmitry Kasatkin help 752ce523ebSDmitry Kasatkin This option defines X509 certificate path. 76