SomberNight
3e3f595ebb
now that bip70 support is removed, all this is only used to check expiration of self-signed electrum server certs in interface.py
107 lines
3.9 KiB
Python
107 lines
3.9 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2015 Thomas Voegtlin
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# This module uses code from TLSLlite
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# TLSLite Author: Trevor Perrin)
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import binascii
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def a2b_base64(s):
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try:
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b = bytearray(binascii.a2b_base64(s))
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except Exception as e:
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raise SyntaxError("base64 error: %s" % e)
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return b
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def dePem(s, name):
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"""Decode a PEM string into a bytearray of its payload.
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The input must contain an appropriate PEM prefix and postfix
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based on the input name string, e.g. for name="CERTIFICATE":
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-----BEGIN CERTIFICATE-----
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MIIBXDCCAUSgAwIBAgIBADANBgkqhkiG9w0BAQUFADAPMQ0wCwYDVQQDEwRUQUNL
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...
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KoZIhvcNAQEFBQADAwA5kw==
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-----END CERTIFICATE-----
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The first such PEM block in the input will be found, and its
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payload will be base64 decoded and returned.
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"""
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prefix = "-----BEGIN %s-----" % name
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postfix = "-----END %s-----" % name
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start = s.find(prefix)
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if start == -1:
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raise SyntaxError("Missing PEM prefix")
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end = s.find(postfix, start+len(prefix))
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if end == -1:
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raise SyntaxError("Missing PEM postfix")
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s = s[start+len("-----BEGIN %s-----" % name) : end]
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retBytes = a2b_base64(s) # May raise SyntaxError
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return retBytes
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def dePemList(s, name):
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"""Decode a sequence of PEM blocks into a list of bytearrays.
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The input must contain any number of PEM blocks, each with the appropriate
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PEM prefix and postfix based on the input name string, e.g. for
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name="TACK BREAK SIG". Arbitrary text can appear between and before and
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after the PEM blocks. For example:
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" Created by TACK.py 0.9.3 Created at 2012-02-01T00:30:10Z -----BEGIN TACK
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BREAK SIG-----
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ATKhrz5C6JHJW8BF5fLVrnQss6JnWVyEaC0p89LNhKPswvcC9/s6+vWLd9snYTUv
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YMEBdw69PUP8JB4AdqA3K6Ap0Fgd9SSTOECeAKOUAym8zcYaXUwpk0+WuPYa7Zmm
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SkbOlK4ywqt+amhWbg9txSGUwFO5tWUHT3QrnRlE/e3PeNFXLx5Bckg= -----END TACK
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BREAK SIG----- Created by TACK.py 0.9.3 Created at 2012-02-01T00:30:11Z
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-----BEGIN TACK BREAK SIG-----
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ATKhrz5C6JHJW8BF5fLVrnQss6JnWVyEaC0p89LNhKPswvcC9/s6+vWLd9snYTUv
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YMEBdw69PUP8JB4AdqA3K6BVCWfcjN36lx6JwxmZQncS6sww7DecFO/qjSePCxwM
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+kdDqX/9/183nmjx6bf0ewhPXkA0nVXsDYZaydN8rJU1GaMlnjcIYxY= -----END TACK
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BREAK SIG----- "
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All such PEM blocks will be found, decoded, and return in an ordered list
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of bytearrays, which may have zero elements if not PEM blocks are found.
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"""
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bList = []
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prefix = "-----BEGIN %s-----" % name
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postfix = "-----END %s-----" % name
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while 1:
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start = s.find(prefix)
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if start == -1:
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return bList
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end = s.find(postfix, start+len(prefix))
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if end == -1:
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raise SyntaxError("Missing PEM postfix")
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s2 = s[start+len(prefix) : end]
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retBytes = a2b_base64(s2) # May raise SyntaxError
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bList.append(retBytes)
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s = s[end+len(postfix) : ]
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