Python3 compatibility

diff --git a/ssss.py b/ssss.py
index f8ce9589b04b0719cf238c3baca5196f81e8a57f..25461473513ca082ef0dc26212950b58c86dc935 100644 (file)
--- a/ssss.py
+++ b/ssss.py
@@ -26,7 +26,7 @@ from pygost.utils import long2bytes
 
 
 SECRET_LEN = 32
-POLY = 115792089237316195423570985008687907853269984665640564039457584007913129640997L
+POLY = 115792089237316195423570985008687907853269984665640564039457584007913129640997  # pylint: disable=line-too-long
 
 
 def _lshift(x, bits):
@@ -36,7 +36,7 @@ def _lshift(x, bits):
 def _field_mult(x, y):
     b = x
     z = b if y & 1 == 1 else 0
-    for i in xrange(1, SECRET_LEN * 8):
+    for i in range(1, SECRET_LEN * 8):
         b = _lshift(b, 1)
         if (b >> (SECRET_LEN * 8)) & 1 == 1:
             b ^= POLY
@@ -47,7 +47,7 @@ def _field_mult(x, y):
 
 def _horner(t, x, coef):
     y = coef[t - 1]
-    for i in xrange(t - 1, 0, -1):
+    for i in range(t - 1, 0, -1):
         y = _field_mult(y, x)
         y ^= coef[i - 1]
     return y
@@ -69,7 +69,7 @@ def _field_invert(x):
 
 def _calculate_li0(t, x, i):
     li0 = 1
-    for j in xrange(t):
+    for j in range(t):
         if j == i:
             continue
         li0 = _field_mult(li0, x[j])
@@ -92,10 +92,10 @@ def split(secret, n, t):
     coef = [bytes2long(secret[::-1])]
     if n < 0 or t < 0 or n < t or not secret:
         raise ValueError("Invalid parameters specified")
-    for i in xrange(1, t):
+    for i in range(1, t):
         coef.append(bytes2long(urandom(SECRET_LEN)))
     out = []
-    for i in xrange(1, n + 1):
+    for i in range(1, n + 1):
         out.append((i, long2bytes(_horner(t, i, coef))[::-1]))
     return out
 
@@ -116,9 +116,9 @@ def combine(t, parts):
         raise ValueError("Invalid parameters specified")
     if len(parts) != len(set(s[1] for s in parts)):
         raise ValueError("Equal parts found")
-    x, y = zip(*[(s[0], bytes2long(s[1][::-1])) for s in parts])
+    x, y = list(zip(*[(s[0], bytes2long(s[1][::-1])) for s in parts]))
     sec = 0
-    for i in xrange(t):
+    for i in range(t):
         li0 = _calculate_li0(t, x, i)
         li0si = _field_mult(li0, y[i])
         sec = sec ^ li0si