From: Heiko Stuebner heiko.stuebner@theobroma-systems.com
The u-boot.itb can be generated either from a static .its that can simply include the needed signature nodes with key-hints or from a fit-generator script referenced in CONFIG_SPL_FIT_GENERATOR.
In the script-case it will need to know what key to include for the key-hint and specified algorithm, so add an option for that key-name.
Signed-off-by: Heiko Stuebner heiko.stuebner@theobroma-systems.com Reviewed-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com Reviewed-by: Simon Glass sjg@chromium.org Reviewed-by: Kever Yang kever.yang@rock-chips.com --- changes in v2: - add doc snippet explaining the option
Kconfig | 8 ++++++++ doc/uImage.FIT/howto.txt | 13 +++++++++++++ 2 files changed, 21 insertions(+)
diff --git a/Kconfig b/Kconfig index bab7c4f3ee..6a9bf8d865 100644 --- a/Kconfig +++ b/Kconfig @@ -548,6 +548,14 @@ config SPL_FIT_GENERATOR passed a list of supported device tree file stub names to include in the generated image.
+config SPL_FIT_GENERATOR_KEY_HINT + string "key hint for signing U-Boot FIT image" + depends on SPL_FIT_SIGNATURE + default "dev" + help + The key hint to store in both the generated .its file as well as + u-boot-key.dtb generated separately and embedded into the SPL. + endif # SPL
endif # FIT diff --git a/doc/uImage.FIT/howto.txt b/doc/uImage.FIT/howto.txt index 8592719685..f409b3770e 100644 --- a/doc/uImage.FIT/howto.txt +++ b/doc/uImage.FIT/howto.txt @@ -66,6 +66,19 @@ can point to a script which generates this image source file during the build process. It gets passed a list of device tree files (taken from the CONFIG_OF_LIST symbol).
+Signing u-boot.itb with SPL_FIT_GENERATOR +----------------------------------------- + +u-boot.itb can be signed to verify the integrity of its components. +When CONFIG_SPL_FIT_SIGNATURE is enabled the CONFIG_SPL_FIT_SIGNATURE_KEY_DIR +option can be used to specifiy the key directory - either a relative or +absolute path. + +See signature.txt for general signature handling, but when +CONFIG_SPL_FIT_GENERATOR is used the option CONFIG_SPL_FIT_GENERATOR_KEY_HINT +can be used to specify the key-hint that should be included into the +created u-boot.its by the generator. + Example 1 -- old-style (non-FDT) kernel booting -----------------------------------------------