remove the import

Author: gstarovo

src/ecdsa/der.py

@@ -153,8 +153,8 @@ def encode_number(n):
 
 
 def encode_boolean(n):
-    return b"\x01" + encode_length(1) + integer_to_octet_string(0 if n else 1)
-
+    # True is a non-zero value, False is encoded as zero
+    return b"\x01" + encode_length(1) + integer_to_octet_string(1 if n else 0)
 
 
 def is_sequence(string):

src/ecdsa/test_malformed_sigs.py

@@ -1,6 +1,5 @@
 from __future__ import with_statement, division
 
-from ecdsa import util
 import hashlib
 
 try:
@@ -40,7 +39,7 @@
     encode_oid,
     encode_sequence,
     encode_constructed,
-    encode_implicit
+    encode_implicit,
 )
 from .ellipticcurve import CurveEdTw
 
@@ -228,16 +227,12 @@ def st_random_der_ecdsa_sig_value_full_r(draw):  # pragma: no cover
     note("Configuration: {0}".format(name))
     order = int(verifying_key.curve.order)
 
-    x = draw(
-        st.integers(min_value=0, max_value=verifying_key.curve.baselen)
-    )
-    y = draw(
-        st.integers(min_value=0, max_value=verifying_key.curve.baselen)
-    )
+    x = draw(st.integers(min_value=0, max_value=verifying_key.curve.baselen))
+    y = draw(st.integers(min_value=0, max_value=verifying_key.curve.baselen))
     prime = verifying_key.curve.curve.p()
     x_str = number_to_string(x, prime)
-    y_ster = number_to_string(y, prime)
-    r = x_str + y_ster
+    y_str = number_to_string(y, prime)
+    r = x_str + y_str
     s = draw(
         st.integers(min_value=0, max_value=order << 4)
         | st.integers(min_value=order >> 2, max_value=order + 1)
@@ -272,7 +267,9 @@ def test_random_der_ecdsa_sig_value_full_r(params):
     verifying_key, sig = params
 
     with pytest.raises(BadSignatureError):
-        verifying_key.verify(sig, example_data, sigdecode=sigdecode_der, accelerate=True)
+        verifying_key.verify(
+            sig, example_data, sigdecode=sigdecode_der, accelerate=True
+        )
 
 
 def st_der_integer(*args, **kwargs):  # pragma: no cover