Bitmessage/PyBitmessage-2024-12-10
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Refactoring crypto base changes #1806

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g1itch merged 14 commits from crypto-sort into v0.6 2021-08-17 15:07:33 +02:00
Conversation 0 Commits 14 Files Changed 15 +9 -4
1 changed files with 9 additions and 4 deletions
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src/highlevelcrypto.py
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@ -10,17 +10,22 @@ High level cryptographic functions based on `.pyelliptic` OpenSSL bindings.
from binascii import hexlify from binascii import hexlify
import pyelliptic import pyelliptic
from bmconfigparser import BMConfigParser
from pyelliptic import OpenSSL from pyelliptic import OpenSSL
from pyelliptic import arithmetic as a from pyelliptic import arithmetic as a
from bmconfigparser import BMConfigParser
__all__ = ['encrypt', 'makeCryptor', 'pointMult', 'privToPub', 'sign', 'verify']
def makeCryptor(privkey): def makeCryptor(privkey):
"""Return a private `.pyelliptic.ECC` instance""" """Return a private `.pyelliptic.ECC` instance"""
private_key = a.changebase(privkey, 16, 256, minlen=32) private_key = a.changebase(privkey, 16, 256, minlen=32)
public_key = pointMult(private_key) public_key = pointMult(private_key)
privkey_bin = '\x02\xca\x00\x20' + private_key privkey_bin = b'\x02\xca\x00\x20' + private_key
pubkey_bin = '\x02\xca\x00\x20' + public_key[1:-32] + '\x00\x20' + public_key[-32:] pubkey_bin = (
b'\x02\xca\x00\x20' + public_key[1:-32] + b'\x00\x20' + public_key[-32:]
)
cryptor = pyelliptic.ECC( cryptor = pyelliptic.ECC(
curve='secp256k1', privkey=privkey_bin, pubkey=pubkey_bin) curve='secp256k1', privkey=privkey_bin, pubkey=pubkey_bin)
return cryptor return cryptor
@ -29,7 +34,7 @@ def makeCryptor(privkey):
def hexToPubkey(pubkey): def hexToPubkey(pubkey):
"""Convert a pubkey from hex to binary""" """Convert a pubkey from hex to binary"""
pubkey_raw = a.changebase(pubkey[2:], 16, 256, minlen=64) pubkey_raw = a.changebase(pubkey[2:], 16, 256, minlen=64)
pubkey_bin = '\x02\xca\x00 ' + pubkey_raw[:32] + '\x00 ' + pubkey_raw[32:] pubkey_bin = b'\x02\xca\x00 ' + pubkey_raw[:32] + b'\x00 ' + pubkey_raw[32:]
return pubkey_bin return pubkey_bin