summaryrefslogtreecommitdiff
path: root/doc/uImage.FIT/signature.txt
Commit message (Collapse)AuthorAgeLines
* Implement generalised RSA public exponents for verified bootMichael van der Westhuizen2014-08-09-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | Remove the verified boot limitation that only allows a single RSA public exponent of 65537 (F4). This change allows use with existing PKI infrastructure and has been tested with HSM-based PKI. Change the configuration OF tree format to store the RSA public exponent as a 64 bit integer and implement backward compatibility for verified boot configuration trees without this extra field. Parameterise vboot_test.sh to test different public exponents. Mathematics and other hard work by Andrew Bott. Tested with the following public exponents: 3, 5, 17, 257, 39981, 50457, 65537 and 4294967297. Signed-off-by: Andrew Bott <Andrew.Bott@ipaccess.com> Signed-off-by: Andrew Wishart <Andrew.Wishart@ipaccess.com> Signed-off-by: Neil Piercy <Neil.Piercy@ipaccess.com> Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Cc: Simon Glass <sjg@chromium.org>
* Enhance fit_check_sign to check all imagesSimon Glass2014-06-19-0/+3
| | | | | | | | | At present this tool only checks the configuration signing. Have it also look at each of the images in the configuration and confirm that they verify. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de> (v1)
* bootm: make use of legacy image format configurableHeiko Schocher2014-06-05-0/+3
| | | | | | | | | | | | | | | | | | | | make the use of legacy image format configurable through the config define CONFIG_IMAGE_FORMAT_LEGACY. When relying on signed FIT images with required signature check the legacy image format should be disabled. Therefore introduce this new define and enable legacy image format if CONFIG_FIT_SIGNATURE is not set. If CONFIG_FIT_SIGNATURE is set disable per default the legacy image format. Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org> Cc: Lars Steubesand <lars.steubesand@philips.com> Cc: Mike Pearce <mike@kaew.be> Cc: Wolfgang Denk <wd@denx.de> Cc: Tom Rini <trini@ti.com> Cc: Michal Simek <monstr@monstr.eu> Acked-by: Simon Glass <sjg@chromium.org>
* tools, fit_check_sign: verify a signed fit imageHeiko Schocher2014-03-21-0/+6
| | | | | | | | add host tool "fit_check_sign" which verifies, if a fit image is signed correct. Signed-off-by: Heiko Schocher <hs@denx.de> Cc: Simon Glass <sjg@chromium.org>
* rsa: add sha256-rsa2048 algorithmHeiko Schocher2014-03-21-1/+13
| | | | | | | | | | | | | | | | | | | | | based on patch from andreas@oetken.name: http://patchwork.ozlabs.org/patch/294318/ commit message: I currently need support for rsa-sha256 signatures in u-boot and found out that the code for signatures is not very generic. Thus adding of different hash-algorithms for rsa-signatures is not easy to do without copy-pasting the rsa-code. I attached a patch for how I think it could be better and included support for rsa-sha256. This is a fast first shot. aditionally work: - removed checkpatch warnings - removed compiler warnings - rebased against current head Signed-off-by: Heiko Schocher <hs@denx.de> Cc: andreas@oetken.name Cc: Simon Glass <sjg@chromium.org>
* image: Add support for signing of FIT configurationsSimon Glass2013-06-26-1/+167
| | | | | | | | | | | | | | | | While signing images is useful, it does not provide complete protection against several types of attack. For example, it it possible to create a FIT with the same signed images, but with the configuration changed such that a different one is selected (mix and match attack). It is also possible to substitute a signed image from an older FIT version into a newer FIT (roll-back attack). Add support for signing of FIT configurations using the libfdt's region support. Please see doc/uImage.FIT/signature.txt for more information. Signed-off-by: Simon Glass <sjg@chromium.org>
* image: Add signing infrastructureSimon Glass2013-06-26-0/+216
Add a structure to describe an algorithm which can sign and (later) verify images. Signed-off-by: Simon Glass <sjg@chromium.org>