| #!/usr/bin/python |
| # |
| # Read ASN.1/PEM X.509 certificates on stdin, parse each into plain text, |
| # then build substrate from it |
| # |
| from pyasn1.codec.der import decoder, encoder |
| from pyasn1_modules import rfc2459, pem |
| import sys |
| |
| if len(sys.argv) != 1: |
| print("""Usage: |
| $ cat CACertificate.pem | %s |
| $ cat userCertificate.pem | %s""" % (sys.argv[0], sys.argv[0])) |
| sys.exit(-1) |
| |
| certType = rfc2459.Certificate() |
| |
| certCnt = 0 |
| |
| while 1: |
| idx, substrate = pem.readPemBlocksFromFile( |
| sys.stdin, ('-----BEGIN CERTIFICATE-----', |
| '-----END CERTIFICATE-----') |
| ) |
| if not substrate: |
| break |
| |
| cert, rest = decoder.decode(substrate, asn1Spec=certType) |
| |
| if rest: substrate = substrate[:-len(rest)] |
| |
| print(cert.prettyPrint()) |
| |
| assert encoder.encode(cert, defMode=False) == substrate or \ |
| encoder.encode(cert, defMode=True) == substrate, \ |
| 'cert recode fails' |
| |
| certCnt = certCnt + 1 |
| |
| print('*** %s PEM cert(s) de/serialized' % certCnt) |
