I would like to get the certs for this timestamp response, this is a microsoft authenticode timestamp response. This is somewhat same like this Export Time stamp 'signing_time' from signed data in asn1 format but for certificates and the response data I'm getting is base64 encoded. I tried to parse this using https://lapo.it/asn1js/ and I'm getting the response but when I tried to parse it using my python code I'm getting pyAsn1 Error.
Timestamp Response to Parse:
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/QAAAAAAAA==
This is what I tried so far:
reference: https://github.com/ralphje/signify/blob/master/signify/pkcs7/signeddata.py#L79 I was thinking maybe if I can get the data I can just manipulate it to get to the certs. Thanks a lot!
from pyasn1.codec.der import decoder
from pyasn1_modules import rfc2315
from base64 import *
def parse_tsr(tsr):
"""Parse into a TimeStampResp.
:param tsr: the timestamp-reply bytes to parse.
:type tsr: a byte string.
:returns: a tuple with a TimeStampResp object and any unparsed remainder.
"""
content, rest = decoder.decode(tsr, asn1Spec=rfc2315.ContentInfo())
data = decoder.decode(content['content'], asn1Spec=rfc2315.SignedData())
return data
