Merge pull request #11 from AdamISZ/customnonce

allow use of custom nonce in ecdsa_sign
ludbb · Jul 30, 2016 · 5a817ea · 5a817ea
2 parents fe2443a + 3caf31d
commit 5a817ea
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Showing 3 changed files with 1,266 additions and 3 deletions.
diff --git a/secp256k1/__init__.py b/secp256k1/__init__.py
@@ -380,12 +380,15 @@ def tweak_mul(self, scalar):
         """
         return _tweak_private(self, lib.secp256k1_ec_privkey_tweak_mul, scalar)
 
-    def ecdsa_sign(self, msg, raw=False, digest=hashlib.sha256):
+    def ecdsa_sign(self, msg, raw=False, digest=hashlib.sha256, custom_nonce=None):
         msg32 = _hash32(msg, raw, digest)
         raw_sig = ffi.new('secp256k1_ecdsa_signature *')
-
+        nonce_fn = ffi.NULL
+        nonce_data = ffi.NULL
+        if custom_nonce:
+            nonce_fn, nonce_data = custom_nonce
         signed = lib.secp256k1_ecdsa_sign(
-            self.ctx, raw_sig, msg32, self.private_key, ffi.NULL, ffi.NULL)
+            self.ctx, raw_sig, msg32, self.private_key, nonce_fn, nonce_data)
         assert signed == 1
 
         return raw_sig