Peg randomized SSS coefficient length to secret's length

goatpig · Sep 21, 2017 · 7bd9887 · 7bd9887
1 parent f893252
commit 7bd9887
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/armoryengine/ArmoryUtils.py b/armoryengine/ArmoryUtils.py
@@ -2623,7 +2623,7 @@ def SplitSecret(secret, needed, pieces, nbytes=None):
    # We use randomized coefficients so as to respect SSS security parameters
    othernum = []
    for i in range(pieces+needed-1):
-      othernum.append(binary_to_int(SecureBinaryData().GenerateRandom(32).toBinStr()))
+      othernum.append(binary_to_int(SecureBinaryData().GenerateRandom(nbytes).toBinStr()))
 
    def poly(x):
       polyout = ff.mult(a, ff.power(x,needed-1))