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det-gen.py
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det-gen.py
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#!/bin/python
# HTT Consulting, LLC
# Robert Moskowitz
# 2023-07-25
# developed with Fedora 35 using
# dnf install python3-pycryptodomex
# https://pycryptodome.readthedocs.io/en/v3.15.0/src/introduction.html
# dnf install python3-IPy
__version__ = '2023.07.25'
import sys, getopt
from subprocess import call, DEVNULL
import hashlib
import math
from binascii import *
import base64
from IPy import IP
from Cryptodome.PublicKey import ECC
from Cryptodome.Hash import cSHAKE128
DATA_SET_SIZE = 1000000
def det_orchid(keyname, raa, hda, hi):
# ORCHID PREFIX = 2001:30/28 = b0010 0000 0000 0001:0000 0000 0011/28
# HID = RAA (always 14 bits) + HDA (always 14 bits) = 10 + 20 = b00 0000 0000 1010 + b00 0000 0000 0001 0100
b_prefix = '0010000000000001000000000011' # RFC 9374 Section 8.2.1
h_prefix = '2001003'
suiteid = 5
b_ogaid = '00000101' # RFC 9374 Section 8.2.2
h_ogaid = suiteid
ContextID = unhexlify("00B5A69C795DF5D5F0087F56843F2C40")
#format the HID from raa and HDA
# print("raa:", raa)
# print("RAA:", f'{raa:014b}')
# print("HDA:", f'{hda:014b}')
b_hid = f'{raa:014b}' + f'{hda:014b}'
# print("HID:", b_hid)
# perform hash with cSHAKE using input data
h_orchid_left = unhexlify(b_prefix + b_hid + b_ogaid)
# print(h_orchid_left.hex())
shake = cSHAKE128.new(custom = ContextID)
shake.update((h_orchid_left + hi))
h_hash = shake.read(8).hex()
# print(h_hash)
# format orchid in binary
h_orchid = hex(int(b_prefix + b_hid + b_ogaid, 2))[2:] + h_hash
# add in ':' for IPv6
print("DET:", h_orchid)
# print(hi.hex())
hiprr = base64.b64encode(hi).decode('ascii')
# print(hiprr)
print("HIP RR: IN HIP ( 5 ", h_orchid, "\n ", hiprr, ")")
#, hiprr[52:].zfill(52), ")")
orchid = ':'.join(h_orchid[i:i+4] for i in range(0, len(h_orchid), 4))
print("DET:", orchid)
fqdn = h_hash + '.' + f'{suiteid:02x}' + "." + f'{raa:04x}' + "." + f'{hda:04x}' + "." + h_prefix + ".det.uas."
print("FQDN:", fqdn)
ip = IP(orchid)
revip = ip.reverseName()
print("Reverse:", revip)
keynamedat = keyname + ".dat"
f = open(keynamedat,'wt')
f.write("DETofC=0x" + h_orchid +"\n")
f.write("HIofC=0x" + hi.hex() +"\n")
f.write('pkeyname="' + keyname + '"\n')
f.close()
return orchid
def main(argv):
print("DET Gen Version: ", __version__)
# set some defaults
keyname = 'keyfile'
passwd = ''
suiteid = 5
raa = 16376
hda = 20
createkeyname = False
# handle cmdline args
try:
opts, args = getopt.getopt(argv,"hn:p:c:",["keyname=","passwd=","suiteid=","raa=","hda=", "keynameexists="])
except getopt.GetoptError:
print('Error')
sys.ext(2)
# parse the args
for opt, arg in opts:
if opt == '-h':
print('det-gen.py [-n,--keyname] <keyname> [-p,--passwd] <password> [--suiteid <HIT Suite ID:4> --raa <RAA:10> --hda <HDA:20> --keynameexists <y/n>]')
sys.exit()
elif opt in ("-n", "--keyname"):
keyname = arg
elif opt in ("-p", "--passwd"):
passwd = arg
elif opt == '--suiteid':
suiteid = int(arg)
elif opt == '--raa':
raa = int(arg)
elif opt == '--hda':
hda = int(arg)
elif opt == '--keynameexists':
if arg == 'n' or arg == 'N':
createkeyname = True
else:
createkeyname = False
# show value we will be using
print("Using the following value for DET generation:")
print("KEY file: ", keyname)
print("KEY PASSWORD: ", passwd)
print("HHIT Suite ID: ", suiteid)
print("RAA: ", raa)
print("HDA: ", hda)
prkeyname = keyname + "prv.pem"
pbkeyname = keyname + "pub.pem"
pbkeynameder = keyname + "pub.der"
if createkeyname:
key = ECC.generate(curve='ed25519')
f = open(prkeyname,'wt')
f.write(key.export_key(format='PEM'))
f.close()
f = open(prkeyname,'rt')
prkey = ECC.import_key(f.read())
# print("EdDSA: ", prkey)
f = open(pbkeyname,'wt')
pbkey = key.public_key()
pbpem = key.public_key().export_key(format="PEM")
# print("EdDSA: ", pbkey)
# print("EdDSA: ", pbpem)
f.write(pbpem)
f.close()
pbder = key.public_key().export_key(format="DER")
print("PK DER: ", pbder.hex())
print("TLSA RR: IN TLSA 3 1 0 (", pbder.hex()[:44].zfill(44), "\n ", pbder.hex()[44:].zfill(44), ")")
f = open(pbkeynameder,'wb')
f.write(pbder)
f.close()
pbraw = key.public_key().export_key(format="raw")
else:
f = open(prkeyname,'rt')
prkey = ECC.import_key(f.read())
f.close()
pbraw = prkey.public_key().export_key(format="raw")
pbder = prkey.public_key().export_key(format="DER")
print("PK DER: ", pbder.hex())
print("TLSA RR: IN TLSA 3 1 0 (", pbder.hex()[:44].zfill(44), "\n ", pbder.hex()[44:].zfill(44), ")")
print("Raw HI: ", pbraw.hex())
det = det_orchid(keyname, raa, hda, pbraw)
if __name__ == "__main__":
main(sys.argv[1:])