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chore: get rid of secp lib (#114)

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* chore: get rid of secp lib

* fixup!
This commit is contained in:
dni ⚡ 2025-11-04 10:34:24 +01:00 • committed by GitHub
parent 3a8c16d155
commit 9c00adbf2d
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3 changed files with 12 additions and 24 deletions
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23
helpers.py
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@ -1,16 +1,16 @@
import base64
import secrets
import secp256k1
import coincurve
from bech32 import bech32_decode, convertbits
from cffi import FFI
from cryptography.hazmat.primitives import padding
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
def get_shared_secret(privkey: str, pubkey: str):
point = secp256k1.PublicKey(bytes.fromhex("02" + pubkey), True)
return point.ecdh(bytes.fromhex(privkey), hashfn=copy_x)
pk = coincurve.PublicKey(bytes.fromhex("02" + pubkey))
sk = coincurve.PrivateKey(bytes.fromhex(privkey))
return sk.ecdh(pk.format())
def decrypt_message(encoded_message: str, encryption_key) -> str:
@ -48,8 +48,8 @@ def encrypt_message(message: str, encryption_key, iv: bytes | None = None) -> st
def sign_message_hash(private_key: str, hash_: bytes) -> str:
privkey = secp256k1.PrivateKey(bytes.fromhex(private_key))
sig = privkey.schnorr_sign(hash_, None, raw=True)
privkey = coincurve.PrivateKey(bytes.fromhex(private_key))
sig = privkey.sign_schnorr(hash_)
return sig.hex()
@ -64,17 +64,6 @@ def test_decrypt_encrypt(encoded_message: str, encryption_key):
), f"expected '{encoded_message}', but got '{ecrypted_msg}'"
ffi = FFI()
@ffi.callback(
"int (unsigned char *, const unsigned char *, const unsigned char *, void *)"
)
def copy_x(output, x32, y32, data):
ffi.memmove(output, x32, 32)
return 1
def normalize_public_key(pubkey: str) -> str:
if pubkey.startswith("npub1"):
_, decoded_data = bech32_decode(pubkey)