def make_timestamp_request(data=None,
digest=None,
hashname='sha1',
include_tsa_certificate=False,
nonce=None):
algorithm_identifier = rfc2459.AlgorithmIdentifier()
algorithm_identifier.setComponentByPosition(0, get_hash_oid(hashname))
message_imprint = rfc3161ng.MessageImprint()
message_imprint.setComponentByPosition(0, algorithm_identifier)
hashobj = hashlib.new(hashname)
if digest:
assert len(
digest
) == hashobj.digest_size, 'digest length is wrong %s != %s' % (
len(digest), hashobj.digest_size)
elif data:
digest = data_to_digest(data)
else:
raise ValueError('You must pass some data to digest, or the digest')
message_imprint.setComponentByPosition(1, digest)
request = rfc3161ng.TimeStampReq()
request.setComponentByPosition(0, 'v1')
request.setComponentByPosition(1, message_imprint)
if nonce is not None:
request.setComponentByPosition(3, int(nonce))
request.setComponentByPosition(4, include_tsa_certificate)
return request
def decode_timestamp_request(request):
tsq, substrate = decoder.decode(request, asn1Spec=rfc3161ng.TimeStampReq())
if substrate:
raise ValueError('Extra data returned')
return tsq