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# $Id$
import POW, POW.pkix, base64, getopt, sys
opts, args = getopt.getopt(sys.argv[1:], "", ["pem", "der"])
use_pem = False
for o, a in opts:
if o == "--pem": use_pem = True
if o == "--der": use_pem = False
for file in args:
f = open(file, "r")
der = f.read()
f.close()
if use_pem:
der = POW.pemRead(POW.X509_CERTIFICATE, der).derWrite()
cert = POW.pkix.Certificate()
cert.fromString(der)
ski = base64.b64encode([x for x in cert.getExtensions() if x[0] == (2, 5, 29, 14)][0][2]).replace("+", "-").replace("/", "_")
print ski, file
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