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| author | Simon Glass <sjg@chromium.org> | 2013-06-13 15:10:04 -0700 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-06-26 10:18:56 -0400 |
| commit | e29495d37f7c0533d365004ca475218250351c93 (patch) | |
| tree | 1ce4db084dea8f629a934abef35140cd79e2b127 /doc | |
| parent | 80e4df8ac661ada5308f3bffebe4e6fae1f8e990 (diff) | |
| download | u-boot-imx-e29495d37f7c0533d365004ca475218250351c93.zip u-boot-imx-e29495d37f7c0533d365004ca475218250351c93.tar.gz u-boot-imx-e29495d37f7c0533d365004ca475218250351c93.tar.bz2 | |
mkimage: Add -K to write public keys to an FDT blob
FIT image verification requires public keys. Add a convenient option to
mkimage to write the public keys to an FDT blob when it uses then for
signing an image. This allows us to use:
mkimage -f test.its -K dest.dtb -k keys test.fit
and have the signatures written to test.fit and the corresponding public
keys written to dest.dtb. Then dest.dtb can be used as the control FDT
for U-Boot (CONFIG_OF_CONTROL), thus providing U-Boot with access to the
public keys it needs.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/mkimage.1 | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/doc/mkimage.1 b/doc/mkimage.1 index 6740fb1..8185ff5 100644 --- a/doc/mkimage.1 +++ b/doc/mkimage.1 @@ -109,6 +109,14 @@ Specifies the directory containing keys to use for signing. This directory should contain a private key file <name>.key for use with signing and a certificate <name>.crt (containing the public key) for use with verification. +.TP +.BI "\-K [" "key_destination" "]" +Specifies a compiled device tree binary file (typically .dtb) to write +public key information into. When a private key is used to sign an image, +the corresponding public key is written into this file for for run-time +verification. Typically the file here is the device tree binary used by +CONFIG_OF_CONTROL in U-Boot. + .SH EXAMPLES List image information: @@ -127,6 +135,14 @@ Create FIT image with compressed PowerPC Linux kernel: .nf .B mkimage -f kernel.its kernel.itb .fi +.P +Create FIT image with compressed kernel and sign it with keys in the +/public/signing-keys directory. Add corresponding public keys into u-boot.dtb, +skipping those for which keys cannot be found. Also add a comment. +.nf +.B mkimage -f kernel.its -k /public/signing-keys -K u-boot.dtb \\\\ +-c "Kernel 3.8 image for production devices" kernel.itb +.fi .SH HOMEPAGE http://www.denx.de/wiki/U-Boot/WebHome |