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Host tool features, such as mkimage's ability to sign FIT images were enabled or disabled based on the target configuration. However, this misses the point of a target-agnostic host tool. A target's ability to verify FIT signatures is independent of mkimage's ability to create those signatures. In fact, u-boot's build system doesn't sign images. The target code can be successfully built without relying on any ability to sign such code. Conversely, mkimage's ability to sign images does not require that those images will only work on targets which support FIT verification. Linking mkimage cryptographic features to target support for FIT verification is misguided. Without loss of generality, we can say that host features are and should be independent of target features. While we prefer that a host tool always supports the same feature set, we recognize the following - some users prefer to build u-boot without a dependency on OpenSSL. - some distros prefer to ship mkimage without linking to OpenSSL To allow these use cases, introduce a host-only Kconfig which is used to select or deselect libcrypto support. Some mkimage features or some host tools might not be available, but this shouldn't affect the u-boot build. I also considered setting the default of this config based on FIT_SIGNATURE. While it would preserve the old behaviour it's also contrary to the goals of this change. I decided to enable it by default, so that the default build yields the most feature-complete mkimage. Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
23 lines
829 B
Text
23 lines
829 B
Text
menu "Tools options"
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config MKIMAGE_DTC_PATH
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string "Path to dtc binary for use within mkimage"
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default "dtc"
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help
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The mkimage host tool will, in order to generate FIT images make
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calls to the dtc application in order to create the output. In
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some cases the system dtc may not support all required features
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and the path to a different version should be given here.
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config TOOLS_LIBCRYPTO
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bool "Use OpenSSL's libcrypto library for host tools"
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default y
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help
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Cryptographic signature, verification, and encryption of images is
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provided by host tools using OpenSSL's libcrypto. Select 'n' here if
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you wish to build host tools without OpenSSL. mkimage will not have
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the ability to sign images.
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This selection does not affect target features, such as runtime FIT
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signature verification.
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endmenu
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