Add test script for blake2b_256 against CPython 3.6 hashlib

scripts/py36-blake2.py

@@ -0,0 +1,36 @@
+
+"""
+This script checks compatibility of crypto.blake2b_256 against hashlib.blake2b in CPython 3.6.
+"""
+
+import hashlib
+import sys
+
+
+def test_b2(b2_input, b2_output):
+    digest = hashlib.blake2b(b2_input, digest_size=32).digest()
+    identical = b2_output == digest
+
+    print('Input:     ', b2_input.hex())
+    print('Expected:  ', b2_output.hex())
+    print('Calculated:', digest.hex())
+    print('Identical: ', identical)
+    print()
+    if not identical:
+        sys.exit(1)
+
+
+test_b2(
+    bytes.fromhex('037fb9b75b20d623f1d5a568050fccde4a1b7c5f5047432925e941a17c7a2d0d7061796c6f6164'),
+    bytes.fromhex('a22d4fc81bb61c3846c334a09eaf28d22dd7df08c9a7a41e713ef28d80eebd45')
+)
+
+test_b2(
+    b'abc',
+    bytes.fromhex('bddd813c634239723171ef3fee98579b94964e3bb1cb3e427262c8c068d52319')
+)
+
+test_b2(
+    bytes.fromhex('e944973af2256d4d670c12dd75304c319f58f4e40df6fb18ef996cb47e063676') + b'1234567890' * 100,
+    bytes.fromhex('97ede832378531dd0f4c668685d166e797da27b47d8cd441e885b60abd5e0cb2'),
+)