From 97b44fde9ceda01b7503a00cd4a0f4d49dc375cf Mon Sep 17 00:00:00 2001 From: tv Date: Tue, 11 Sep 2018 21:58:13 +0200 Subject: syncthing-device-id: init Source: https://gist.github.com/spectras/b3a6f0093ddb1635b39279e9a539ca21 --- krebs/5pkgs/simple/syncthing-device-id.nix | 36 ++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 krebs/5pkgs/simple/syncthing-device-id.nix (limited to 'krebs/5pkgs/simple') diff --git a/krebs/5pkgs/simple/syncthing-device-id.nix b/krebs/5pkgs/simple/syncthing-device-id.nix new file mode 100644 index 000000000..f7d167fdf --- /dev/null +++ b/krebs/5pkgs/simple/syncthing-device-id.nix @@ -0,0 +1,36 @@ +{ writePython2Bin }: + +writePython2Bin "syncthing-device-id" {} /* python */ '' + import base64 + import hashlib + import subprocess + import sys + + B32ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ234567' + + def luhn_checksum(data, alphabet=B32ALPHABET): + n = len(alphabet) + number = tuple(alphabet.index(i) for i in reversed(data)) + result = (sum(number[::2]) + + sum(sum(divmod(i * 2, n)) for i in number[1::2])) % n + return alphabet[-result] + + def main(incert): + der_data = subprocess.check_output(['openssl', 'x509', '-outform', 'DER'], stdin=incert) + data_hash = hashlib.sha256(der_data) + b32_hash = base64.b32encode(data_hash.digest()).decode('ascii') + + result = b32_hash.upper().rstrip('=') + blocks = [result[pos:pos+13] for pos in range(0, len(result), 13)] + result = '''.join(block + luhn_checksum(block) for block in blocks) + + blocks = [result[pos:pos+7] for pos in range(0, len(result), 7)] + print('-'.join(blocks)) + + if __name__ == '__main__': + import argparse + parser = argparse.ArgumentParser(description='Generate syncthing ID from certificate') + parser.add_argument('incert', type=argparse.FileType('rb'), help='Certificate path') + args = parser.parse_args() + main(**vars(args)) +'' -- cgit v1.2.3