bin_to_oemvars

#!/usr/bin/python

import argparse
import re
import string

def guid_string(p):
    if re.match('^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$', p) is None:
        raise argparse.ArgumentTypeError("Argument must be a GUID value")
    return p

def escaped_value(value):
    result = ''
    for char in value:
        result += "%%%02x" % ord(char)
    return result

def main():
    parser = argparse.ArgumentParser(epilog="""Common namespace/variable pairings:
--global/PK,
--global/KEK,
--image-security/db
""")
    guid_group = parser.add_mutually_exclusive_group(required=True)
    guid_group.add_argument('--guid',
                            dest='namespace_guid',
                            type=guid_string,
                            help="namespace GUID of the variables")
    guid_group.add_argument('--global',
                            action='store_const',
                            metavar='namespace-guid',
                            const="8be4df61-93ca-11d2-aa0d-00e098032b8c",
                            dest='namespace_guid',
                            help='variables are in EFI global namespace')
    guid_group.add_argument('--image-security',
                            action='store_const',
                            const="d719b2cb-3d3a-4596-a3bc-dad00e67656f",
                            dest='namespace_guid',
                            help='variables are in EFI image security namespace')
    guid_group.add_argument('--fastboot',
                            action='store_const',
                            const="1ac80a82-4f0c-456b-9a99-debeb431fcc1",
                            dest='namespace_guid',
                            help='variables are in EFI fastboot namespace')
    parser.add_argument('--var',
                        nargs=2,
                        metavar=('NAME', 'VALUE-FILENAME'),
                        action='append',
                        required=True,
                        help='output variable with specific value')
    args = parser.parse_args()

    print "GUID = %s" % (args.namespace_guid)
    print
    for var in args.var:
        value_file = open(var[1], "r")
        value = value_file.read()
        print "%s @%s" % (var[0], escaped_value(value))
        print


if __name__ == "__main__":
    try:
        main()
    except Exception as e:
        print e