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-rw-r--r--certs/Kconfig7
1 files changed, 5 insertions, 2 deletions
diff --git a/certs/Kconfig b/certs/Kconfig
index 73d1350c223a..4bd385b25084 100644
--- a/certs/Kconfig
+++ b/certs/Kconfig
@@ -104,8 +104,11 @@ config SYSTEM_BLACKLIST_HASH_LIST
help
If set, this option should be the filename of a list of hashes in the
form "<hash>", "<hash>", ... . This will be included into a C
- wrapper to incorporate the list into the kernel. Each <hash> should
- be a string of hex digits.
+ wrapper to incorporate the list into the kernel. Each <hash> must be a
+ string starting with a prefix ("tbs" or "bin"), then a colon (":"), and
+ finally an even number of hexadecimal lowercase characters (up to 128).
+ Certificate hashes can be generated with
+ tools/certs/print-cert-tbs-hash.sh .
config SYSTEM_REVOCATION_LIST
bool "Provide system-wide ring of revocation certificates"