#
# This file is part of pyasn1-modules software.
#
# Copyright (c) 2005-2019, Ilya Etingof <etingof@gmail.com>
# License: http://snmplabs.com/pyasn1/license.html
#
import base64
import sys
stSpam, stHam, stDump =
0,
1,
2
# The markers parameters is in form ('start1', 'stop1'), ('start2', 'stop2')...
# Return is (marker-index, substrate)
def readPemBlocksFromFile(fileObj, *markers):
startMarkers = dict(map(
lambda x: (x[
1], x[
0]),
enumerate(map(
lambda y: y[
0], markers))))
stopMarkers = dict(map(
lambda x: (x[
1], x[
0]),
enumerate(map(
lambda y: y[
1], markers))))
idx = -
1
substrate =
''
certLines = []
state = stSpam
while True:
certLine = fileObj.readline()
if not certLine:
break
certLine = certLine.strip()
if state == stSpam:
if certLine
in startMarkers:
certLines = []
idx = startMarkers[certLine]
state = stHam
continue
if state == stHam:
if certLine
in stopMarkers
and stopMarkers[certLine] == idx:
state = stDump
else:
certLines.append(certLine)
if state == stDump:
if sys.version_info[
0] <=
2:
substrate =
''.join([base64.b64decode(x)
for x
in certLines])
else:
substrate =
''.encode().join([base64.b64decode(x.encode())
for x
in certLines])
break
return idx, substrate
# Backward compatibility routine
def readPemFromFile(fileObj,
startMarker=
'-----BEGIN CERTIFICATE-----',
endMarker=
'-----END CERTIFICATE-----'):
idx, substrate = readPemBlocksFromFile(fileObj, (startMarker, endMarker))
return substrate
def readBase64fromText(text):
if sys.version_info[
0] <=
2:
return base64.b64decode(text)
else:
return base64.b64decode(text.encode())
def readBase64FromFile(fileObj):
return readBase64fromText(fileObj.read())
