lnurl-auth: hashing_key -> linking_key.

2020-11-11 22:37:55 -03:00
parent 805000cd06
commit b794f8302d
3 changed files with 13 additions and 6 deletions
@@ -1,4 +1,5 @@
 import json
+import hmac
 import hashlib
 from ecdsa import SECP256k1, SigningKey  # type: ignore
 from typing import List, NamedTuple, Optional, Dict
@@ -35,10 +36,12 @@ class Wallet(NamedTuple):
    def balance(self) -> int:
        return self.balance_msat // 1000

-    @property
-    def lnurlauth_key(self) -> SigningKey:
+    def lnurlauth_key(self, domain: str) -> SigningKey:
+        hashing_key = hashlib.sha256(self.id.encode("utf-8")).digest()
+        linking_key = hmac.digest(hashing_key, domain.encode("utf-8"), "sha256")
+
        return SigningKey.from_string(
-            hashlib.sha256(self.id.encode("utf-8")).digest(),
+            linking_key,
            curve=SECP256k1,
            hashfunc=hashlib.sha256,
        )