1#!/usr/bin/python
2#
3# Read ASN.1/PEM OCSP response on stdin, parse into
4# plain text, then build substrate from it
5#
6from pyasn1.codec.der import decoder, encoder
7from pyasn1_modules import rfc2560, pem
8import sys
9
10if len(sys.argv) != 1:
11    print("""Usage:
12$ cat ocsp-response.pem | %s""" % sys.argv[0])
13    sys.exit(-1)
14
15ocspReq = rfc2560.OCSPResponse()
16
17substrate = pem.readBase64FromFile(sys.stdin)
18if not substrate:
19    sys.exit(0)
20
21cr, rest = decoder.decode(substrate, asn1Spec=ocspReq)
22
23print(cr.prettyPrint())
24
25assert encoder.encode(cr, defMode=False) == substrate or \
26       encoder.encode(cr, defMode=True) == substrate, \
27       'OCSP request recode fails'
28