1# SPDX-License-Identifier: GPL-2.0+ 2# Copyright (C) 2023 Weidm��ller 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') 68