mirror of
https://github.com/cjdelisle/cjdns
synced 2025-10-06 00:32:50 +02:00
66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
#!/usr/bin/env python2
|
|
# You may redistribute this program and/or modify it under the terms of
|
|
# the GNU General Public License as published by the Free Software Foundation,
|
|
# either version 3 of the License, or (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
from hashlib import sha512;
|
|
|
|
# see util/Base32.h
|
|
def Base32_decode(input):
|
|
output = bytearray(len(input));
|
|
numForAscii = [
|
|
99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,
|
|
99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,
|
|
99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,99,99,99,99,99,99,
|
|
99,99,10,11,12,99,13,14,15,99,16,17,18,19,20,99,
|
|
21,22,23,24,25,26,27,28,29,30,31,99,99,99,99,99,
|
|
99,99,10,11,12,99,13,14,15,99,16,17,18,19,20,99,
|
|
21,22,23,24,25,26,27,28,29,30,31,99,99,99,99,99,
|
|
];
|
|
|
|
outputIndex = 0;
|
|
inputIndex = 0;
|
|
nextByte = 0;
|
|
bits = 0;
|
|
|
|
while (inputIndex < len(input)):
|
|
o = ord(input[inputIndex]);
|
|
if (o & 0x80): raise ValueError;
|
|
b = numForAscii[o];
|
|
inputIndex += 1;
|
|
if (b > 31): raise ValueError("bad character " + input[inputIndex]);
|
|
|
|
nextByte |= (b << bits);
|
|
bits += 5;
|
|
|
|
if (bits >= 8):
|
|
output[outputIndex] = nextByte & 0xff;
|
|
outputIndex += 1;
|
|
bits -= 8;
|
|
nextByte >>= 8;
|
|
|
|
if (bits >= 5 or nextByte):
|
|
raise ValueError("bits is " + str(bits) + " and nextByte is " + str(nextByte));
|
|
|
|
return buffer(output, 0, outputIndex);
|
|
|
|
|
|
def PublicToIp6_convert(pubKey):
|
|
if pubKey[-2:] != ".k":
|
|
raise ValueError("key does not end with .k")
|
|
|
|
keyBytes = Base32_decode(pubKey[:-2])
|
|
hashOne = sha512(keyBytes).digest()
|
|
hashTwo = sha512(hashOne).hexdigest()
|
|
|
|
return ":".join([hashTwo[i:i+4] for i in range(0, 32, 4)])
|