31 lines
963 B
Python
31 lines
963 B
Python
# https://stackoverflow.com/a/18266970
|
|
|
|
from Crypto.PublicKey import RSA
|
|
from struct import pack
|
|
from hashlib import sha3_512
|
|
from cryptography.hazmat.primitives.serialization import load_der_private_key
|
|
from functools import cache
|
|
|
|
|
|
class PRNG(object):
|
|
def __init__(self, seed):
|
|
self.index = 0
|
|
self.seed = sha3_512(seed).digest()
|
|
self.buffer = b""
|
|
def __call__(self, n):
|
|
while len(self.buffer) < n:
|
|
self.buffer += sha3_512(self.seed + pack("<d", self.index)).digest()
|
|
self.index += 1
|
|
result, self.buffer = self.buffer[:n], self.buffer[n:]
|
|
return result
|
|
|
|
|
|
def _generate_deterministic_rsa_private_key(secret_bytes):
|
|
return RSA.generate(2048, randfunc=PRNG(secret_bytes)).export_key('DER')
|
|
|
|
@cache
|
|
def generate_deterministic_rsa_private_key(secret_bytes):
|
|
return load_der_private_key(
|
|
_generate_deterministic_rsa_private_key(secret_bytes),
|
|
password=None,
|
|
)
|