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doc: fitImage: example of a signature node

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Describe that a signature node can be added to a binary device tree using
the mkimage tool.

Provide an example device tree node.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-12-11 10:45:50 +01:00 committed by Tom Rini
parent 83c646c05e
commit 97fd36933c
1 changed files with 62 additions and 0 deletions
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doc/uImage.FIT/signature.txt
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@ -167,6 +167,68 @@ For RSA the following are mandatory:
- rsa,r-squared: (2^num-bits)^2 as a big-endian multi-word integer
- rsa,n0-inverse: -1 / modulus[0] mod 2^32
These parameters can be added to a binary device tree using parameter -K of the
mkimage command::
tools/mkimage -f fit.its -K control.dtb -k keys -r image.fit
Here is an example of a generated device tree node::
signature {
key-dev {
required = "conf";
algo = "sha256,rsa2048";
rsa,r-squared = <0xb76d1acf 0xa1763ca5 0xeb2f126
0x742edc80 0xd3f42177 0x9741d9d9
0x35bb476e 0xff41c718 0xd3801430
0xf22537cb 0xa7e79960 0xae32a043
0x7da1427a 0x341d6492 0x3c2762f5
0xaac04726 0x5b262d96 0xf984e86d
0xb99443c7 0x17080c33 0x940f6892
0xd57a95d1 0x6ea7b691 0xc5038fa8
0x6bb48a6e 0x73f1b1ea 0x37160841
0xe05715ce 0xa7c45bbd 0x690d82d5
0x99c2454c 0x6ff117b3 0xd830683b
0x3f81c9cf 0x1ca38a91 0x0c3392e4
0xd817c625 0x7b8e9a24 0x175b89ea
0xad79f3dc 0x4d50d7b4 0x9d4e90f8
0xad9e2939 0xc165d6a4 0x0ada7e1b
0xfb1bf495 0xfc3131c2 0xb8c6e604
0xc2761124 0xf63de4a6 0x0e9565f9
0xc8e53761 0x7e7a37a5 0xe99dcdae
0x9aff7e1e 0xbd44b13d 0x6b0e6aa4
0x038907e4 0x8e0d6850 0xef51bc20
0xf73c94af 0x88bea7b1 0xcbbb1b30
0xd024b7f3>;
rsa,modulus = <0xc0711d6cb 0x9e86db7f 0x45986dbe
0x023f1e8c9 0xe1a4c4d0 0x8a0dfdc9
0x023ba0c48 0x06815f6a 0x5caa0654
0x07078c4b7 0x3d154853 0x40729023
0x0b007c8fe 0x5a3647e5 0x23b41e20
0x024720591 0x66915305 0x0e0b29b0
0x0de2ad30d 0x8589430f 0xb1590325
0x0fb9f5d5e 0x9eba752a 0xd88e6de9
0x056b3dcc6 0x9a6b8e61 0x6784f61f
0x000f39c21 0x5eec6b33 0xd78e4f78
0x0921a305f 0xaa2cc27e 0x1ca917af
0x06e1134f4 0xd48cac77 0x4e914d07
0x0f707aa5a 0x0d141f41 0x84677f1d
0x0ad47a049 0x028aedb6 0xd5536fcf
0x03fef1e4f 0x133a03d2 0xfd7a750a
0x0f9159732 0xd207812e 0x6a807375
0x06434230d 0xc8e22dad 0x9f29b3d6
0x07c44ac2b 0xfa2aad88 0xe2429504
0x041febd41 0x85d0d142 0x7b194d65
0x06e5d55ea 0x41116961 0xf3181dde
0x068bf5fbc 0x3dd82047 0x00ee647e
0x0d7a44ab3>;
rsa,exponent = <0x00 0x10001>;
rsa,n0-inverse = <0xb3928b85>;
rsa,num-bits = <0x800>;
key-name-hint = "dev";
};
};
Signed Configurations
---------------------