Bitmessage/PyBitmessage-2024-08-21
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Rewrite highlevelcrypto.makeCryptor() to reuse pyelliptic.ECC._set_keys()

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This commit is contained in:
Lee Miller 2022-08-07 19:00:19 +03:00
parent d751fb9081
commit df235f6c20
Signed by untrusted user: lee.miller
GPG Key ID: 4F97A5EA88F4AB63
1 changed files with 3 additions and 6 deletions
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9
src/highlevelcrypto.py
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@ -18,16 +18,13 @@ from bmconfigparser import config
__all__ = ['encrypt', 'makeCryptor', 'pointMult', 'privToPub', 'sign', 'verify']
def makeCryptor(privkey):
def makeCryptor(privkey, curve='secp256k1'):
"""Return a private `.pyelliptic.ECC` instance"""
private_key = a.changebase(privkey, 16, 256, minlen=32)
public_key = pointMult(private_key)
privkey_bin = b'\x02\xca\x00\x20' + private_key
pubkey_bin = (
b'\x02\xca\x00\x20' + public_key[1:-32] + b'\x00\x20' + public_key[-32:]
)
cryptor = pyelliptic.ECC(
curve='secp256k1', privkey=privkey_bin, pubkey=pubkey_bin)
pubkey_x=public_key[1:-32], pubkey_y=public_key[-32:],
raw_privkey=private_key, curve=curve)
return cryptor