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Lukas Funke76b08b72023-07-18 13:53:14 +02001# SPDX-License-Identifier: GPL-2.0+
2# Copyright (C) 2023 Weidmüller Interface GmbH & Co. KG
3# Lukas Funke <lukas.funke@weidmueller.com>
4#
5"""Bintool implementation for fdt_add_pubkey"""
6
7from binman import bintool
8
9class Bintoolfdt_add_pubkey(bintool.Bintool):
10 """Add public key to control dtb (spl or u-boot proper)
11
12 This bintool supports running `fdt_add_pubkey`.
13
14 Normally mkimage adds signature information to the control dtb. However
15 binman images are built independent from each other. Thus it is required
16 to add the public key separately from mkimage.
17 """
18 def __init__(self, name):
19 super().__init__(name, 'Generate image for U-Boot')
20
21 # pylint: disable=R0913
22 def run(self, input_fname, keydir, keyname, required, algo):
23 """Run fdt_add_pubkey
24
25 Args:
26 input_fname (str): dtb file to sign
27 keydir (str): Directory with public key. Optional parameter,
28 default value: '.' (current directory)
29 keyname (str): Public key name. Optional parameter,
30 default value: key
31 required (str): If present this indicates that the key must be
32 verified for the image / configuration to be considered valid.
33 algo (str): Cryptographic algorithm. Optional parameter,
34 default value: sha1,rsa2048
35 """
36 args = []
37 if algo:
38 args += ['-a', algo]
39 if keydir:
40 args += ['-k', keydir]
41 if keyname:
42 args += ['-n', keyname]
43 if required:
44 args += ['-r', required]
45
46 args += [ input_fname ]
47
48 return self.run_cmd(*args)
49
50 def fetch(self, method):
51 """Fetch handler for fdt_add_pubkey
52
53 This installs fdt_add_pubkey using the apt utility.
54
55 Args:
56 method (FETCH_...): Method to use
57
58 Returns:
59 True if the file was fetched and now installed, None if a method
60 other than FETCH_BIN was requested
61
62 Raises:
63 Valuerror: Fetching could not be completed
64 """
65 if method != bintool.FETCH_BIN:
66 return None
67 return self.apt_install('u-boot-tools')