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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import argparse
from base64 import b64encode
from hashlib import sha1
import sys
import ctypes
import nss_ctypes
def nss_create_detached_signature(cert, dataToSign, wincx):
certdb = nss_ctypes.CERT_GetDefaultCertDB()
p7 = nss_ctypes.SEC_PKCS7CreateSignedData(cert,
nss_ctypes.certUsageObjectSigner,
certdb,
nss_ctypes.SEC_OID_SHA1,
sha1(dataToSign).digest(),
wincx)
try:
nss_ctypes.SEC_PKCS7AddSigningTime(p7)
nss_ctypes.SEC_PKCS7IncludeCertChain(p7, wincx)
return nss_ctypes.SEC_PKCS7Encode(p7, None, wincx)
finally:
nss_ctypes.SEC_PKCS7DestroyContentInfo(p7)
# Sign a manifest file
def sign_file(in_file, out_file, cert, wincx):
contents = in_file.read()
in_file.close()
# generate base64 encoded string of the sha1 digest of the input file
in_file_hash = b64encode(sha1(contents).digest())
# sign the base64 encoded string with the given certificate
in_file_signature = nss_create_detached_signature(cert, in_file_hash, wincx)
# write the content of the output file
out_file.write(in_file_signature)
out_file.close()
def main():
parser = argparse.ArgumentParser(description='Sign a B2G app manifest.')
parser.add_argument('-d', action='store',
required=True, help='NSS database directory')
parser.add_argument('-f', action='store',
type=argparse.FileType('rb'),
required=True, help='password file')
parser.add_argument('-k', action='store',
required=True, help="nickname of signing cert.")
parser.add_argument('-i', action='store', type=argparse.FileType('rb'),
required=True, help="input manifest file (unsigned)")
parser.add_argument('-o', action='store', type=argparse.FileType('wb'),
required=True, help="output manifest file (signed)")
args = parser.parse_args()
db_dir = args.d
password = args.f.readline().strip()
cert_nickname = args.k
cert = None
try:
nss_ctypes.NSS_Init(db_dir)
wincx = nss_ctypes.SetPasswordContext(password)
cert = nss_ctypes.PK11_FindCertFromNickname(cert_nickname, wincx)
sign_file(args.i, args.o, cert, wincx)
return 0
finally:
nss_ctypes.CERT_DestroyCertificate(cert)
nss_ctypes.NSS_Shutdown()
if __name__ == "__main__":
sys.exit(main())
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