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953d4177af
And a new entry type which supports generation of x509 certificates. This uses a new 'openssl' btool with just one operation so far. Signed-off-by: Simon Glass <sjg@chromium.org>
95 lines
2.7 KiB
Python
95 lines
2.7 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright 2022 Google LLC
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#
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"""Bintool implementation for openssl
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openssl provides a number of features useful for signing images
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Documentation is at https://www.coreboot.org/CBFS
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Source code is at https://www.openssl.org/
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"""
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import hashlib
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from binman import bintool
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from u_boot_pylib import tools
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class Bintoolopenssl(bintool.Bintool):
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"""openssl tool
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This bintool supports creating new openssl certificates.
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It also supports fetching a binary openssl
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Documentation about openssl is at https://www.openssl.org/
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"""
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def __init__(self, name):
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super().__init__(
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name, 'openssl cryptography toolkit',
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version_regex=r'OpenSSL (.*) \(', version_args='version')
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def x509_cert(self, cert_fname, input_fname, key_fname, cn, revision,
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config_fname):
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"""Create a certificate
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Args:
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cert_fname (str): Filename of certificate to create
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input_fname (str): Filename containing data to sign
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key_fname (str): Filename of .pem file
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cn (str): Common name
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revision (int): Revision number
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config_fname (str): Filename to write fconfig into
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Returns:
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str: Tool output
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"""
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indata = tools.read_file(input_fname)
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hashval = hashlib.sha512(indata).hexdigest()
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with open(config_fname, 'w', encoding='utf-8') as outf:
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print(f'''[ req ]
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distinguished_name = req_distinguished_name
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x509_extensions = v3_ca
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prompt = no
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dirstring_type = nobmp
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[ req_distinguished_name ]
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CN = {cert_fname}
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[ v3_ca ]
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basicConstraints = CA:true
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1.3.6.1.4.1.294.1.3 = ASN1:SEQUENCE:swrv
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1.3.6.1.4.1.294.1.34 = ASN1:SEQUENCE:sysfw_image_integrity
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[ swrv ]
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swrv = INTEGER:{revision}
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[ sysfw_image_integrity ]
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shaType = OID:2.16.840.1.101.3.4.2.3
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shaValue = FORMAT:HEX,OCT:{hashval}
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imageSize = INTEGER:{len(indata)}
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''', file=outf)
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args = ['req', '-new', '-x509', '-key', key_fname, '-nodes',
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'-outform', 'DER', '-out', cert_fname, '-config', config_fname,
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'-sha512']
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return self.run_cmd(*args)
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def fetch(self, method):
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"""Fetch handler for openssl
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This installs the openssl package using the apt utility.
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Args:
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method (FETCH_...): Method to use
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Returns:
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True if the file was fetched and now installed, None if a method
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other than FETCH_BIN was requested
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Raises:
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Valuerror: Fetching could not be completed
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"""
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if method != bintool.FETCH_BIN:
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return None
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return self.apt_install('openssl')
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