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file reorganization with top-level module

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Janus
2018-07-11 17:38:47 +02:00
parent 30a7952cbb
commit 097ac144d9
317 changed files with 438 additions and 470 deletions
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electrum/pem.py Normal file
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#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2015 Thomas Voegtlin
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# This module uses code from TLSLlite
# TLSLite Author: Trevor Perrin)
import binascii
from .x509 import ASN1_Node, bytestr_to_int, decode_OID
def a2b_base64(s):
try:
b = bytearray(binascii.a2b_base64(s))
except Exception as e:
raise SyntaxError("base64 error: %s" % e)
return b
def b2a_base64(b):
return binascii.b2a_base64(b)
def dePem(s, name):
"""Decode a PEM string into a bytearray of its payload.
The input must contain an appropriate PEM prefix and postfix
based on the input name string, e.g. for name="CERTIFICATE":
-----BEGIN CERTIFICATE-----
MIIBXDCCAUSgAwIBAgIBADANBgkqhkiG9w0BAQUFADAPMQ0wCwYDVQQDEwRUQUNL
...
KoZIhvcNAQEFBQADAwA5kw==
-----END CERTIFICATE-----
The first such PEM block in the input will be found, and its
payload will be base64 decoded and returned.
"""
prefix = "-----BEGIN %s-----" % name
postfix = "-----END %s-----" % name
start = s.find(prefix)
if start == -1:
raise SyntaxError("Missing PEM prefix")
end = s.find(postfix, start+len(prefix))
if end == -1:
raise SyntaxError("Missing PEM postfix")
s = s[start+len("-----BEGIN %s-----" % name) : end]
retBytes = a2b_base64(s) # May raise SyntaxError
return retBytes
def dePemList(s, name):
"""Decode a sequence of PEM blocks into a list of bytearrays.
The input must contain any number of PEM blocks, each with the appropriate
PEM prefix and postfix based on the input name string, e.g. for
name="TACK BREAK SIG". Arbitrary text can appear between and before and
after the PEM blocks. For example:
" Created by TACK.py 0.9.3 Created at 2012-02-01T00:30:10Z -----BEGIN TACK
BREAK SIG-----
ATKhrz5C6JHJW8BF5fLVrnQss6JnWVyEaC0p89LNhKPswvcC9/s6+vWLd9snYTUv
YMEBdw69PUP8JB4AdqA3K6Ap0Fgd9SSTOECeAKOUAym8zcYaXUwpk0+WuPYa7Zmm
SkbOlK4ywqt+amhWbg9txSGUwFO5tWUHT3QrnRlE/e3PeNFXLx5Bckg= -----END TACK
BREAK SIG----- Created by TACK.py 0.9.3 Created at 2012-02-01T00:30:11Z
-----BEGIN TACK BREAK SIG-----
ATKhrz5C6JHJW8BF5fLVrnQss6JnWVyEaC0p89LNhKPswvcC9/s6+vWLd9snYTUv
YMEBdw69PUP8JB4AdqA3K6BVCWfcjN36lx6JwxmZQncS6sww7DecFO/qjSePCxwM
+kdDqX/9/183nmjx6bf0ewhPXkA0nVXsDYZaydN8rJU1GaMlnjcIYxY= -----END TACK
BREAK SIG----- "
All such PEM blocks will be found, decoded, and return in an ordered list
of bytearrays, which may have zero elements if not PEM blocks are found.
"""
bList = []
prefix = "-----BEGIN %s-----" % name
postfix = "-----END %s-----" % name
while 1:
start = s.find(prefix)
if start == -1:
return bList
end = s.find(postfix, start+len(prefix))
if end == -1:
raise SyntaxError("Missing PEM postfix")
s2 = s[start+len(prefix) : end]
retBytes = a2b_base64(s2) # May raise SyntaxError
bList.append(retBytes)
s = s[end+len(postfix) : ]
def pem(b, name):
"""Encode a payload bytearray into a PEM string.
The input will be base64 encoded, then wrapped in a PEM prefix/postfix
based on the name string, e.g. for name="CERTIFICATE":
-----BEGIN CERTIFICATE-----
MIIBXDCCAUSgAwIBAgIBADANBgkqhkiG9w0BAQUFADAPMQ0wCwYDVQQDEwRUQUNL
...
KoZIhvcNAQEFBQADAwA5kw==
-----END CERTIFICATE-----
"""
s1 = b2a_base64(b)[:-1] # remove terminating \n
s2 = b""
while s1:
s2 += s1[:64] + b"\n"
s1 = s1[64:]
s = ("-----BEGIN %s-----\n" % name).encode('ascii') + s2 + \
("-----END %s-----\n" % name).encode('ascii')
return s
def pemSniff(inStr, name):
searchStr = "-----BEGIN %s-----" % name
return searchStr in inStr
def parse_private_key(s):
"""Parse a string containing a PEM-encoded <privateKey>."""
if pemSniff(s, "PRIVATE KEY"):
bytes = dePem(s, "PRIVATE KEY")
return _parsePKCS8(bytes)
elif pemSniff(s, "RSA PRIVATE KEY"):
bytes = dePem(s, "RSA PRIVATE KEY")
return _parseSSLeay(bytes)
else:
raise SyntaxError("Not a PEM private key file")
def _parsePKCS8(_bytes):
s = ASN1_Node(_bytes)
root = s.root()
version_node = s.first_child(root)
version = bytestr_to_int(s.get_value_of_type(version_node, 'INTEGER'))
if version != 0:
raise SyntaxError("Unrecognized PKCS8 version")
rsaOID_node = s.next_node(version_node)
ii = s.first_child(rsaOID_node)
rsaOID = decode_OID(s.get_value_of_type(ii, 'OBJECT IDENTIFIER'))
if rsaOID != '1.2.840.113549.1.1.1':
raise SyntaxError("Unrecognized AlgorithmIdentifier")
privkey_node = s.next_node(rsaOID_node)
value = s.get_value_of_type(privkey_node, 'OCTET STRING')
return _parseASN1PrivateKey(value)
def _parseSSLeay(bytes):
return _parseASN1PrivateKey(ASN1_Node(bytes))
def bytesToNumber(s):
return int(binascii.hexlify(s), 16)
def _parseASN1PrivateKey(s):
s = ASN1_Node(s)
root = s.root()
version_node = s.first_child(root)
version = bytestr_to_int(s.get_value_of_type(version_node, 'INTEGER'))
if version != 0:
raise SyntaxError("Unrecognized RSAPrivateKey version")
n = s.next_node(version_node)
e = s.next_node(n)
d = s.next_node(e)
p = s.next_node(d)
q = s.next_node(p)
dP = s.next_node(q)
dQ = s.next_node(dP)
qInv = s.next_node(dQ)
return list(map(lambda x: bytesToNumber(s.get_value_of_type(x, 'INTEGER')), [n, e, d, p, q, dP, dQ, qInv]))