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- #!/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)])
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