Centralized the checksum computing of binary contents.

1 files changed, 67 insertions, 0 deletions

diff --git a/tests/analysis/contents/checksum.py b/tests/analysis/contents/checksum.py
new file mode 100644
index 0000000..ba09a3f
--- /dev/null
+++ b/tests/analysis/contents/checksum.py
@@ -0,0 +1,67 @@
+#!/usr/bin/python3-dbg
+# -*- coding: utf-8 -*-
+
+
+# Tests validant le bon calcul d'empreintes.
+
+
+from chrysacase import ChrysalideTestCase
+from pychrysalide.analysis.contents import FileContent, RestrictedContent
+from pychrysalide.arch import vmpa, mrange
+import hashlib
+import tempfile
+
+
+class TestRestrictedContent(ChrysalideTestCase):
+    """TestCase for analysis.contents.RestrictedContent."""
+
+    @classmethod
+    def setUpClass(cls):
+
+        super(TestRestrictedContent, cls).setUpClass()
+
+        cls._out = tempfile.NamedTemporaryFile()
+
+        cls._out.write(b'AAAABBBBCCCCDDDD')
+
+        cls._out.flush()
+
+        cls.log('Using temporary file "%s"' % cls._out.name)
+
+
+    @classmethod
+    def tearDownClass(cls):
+
+        super(TestRestrictedContent, cls).tearDownClass()
+
+        cls.log('Delete file "%s"' % cls._out.name)
+
+        cls._out.close()
+
+
+    def testFullChecksum(self):
+        """Check checksum of full content."""
+
+        fcnt = FileContent(self._out.name)
+        self.assertIsNotNone(fcnt)
+
+        expected = hashlib.sha256(b'AAAABBBBCCCCDDDD').hexdigest()
+
+        self.assertEqual(fcnt.get_checksum(), expected)
+
+
+    def testPartialChecksum(self):
+        """Check checksum of restricted content."""
+
+        fcnt = FileContent(self._out.name)
+        self.assertIsNotNone(fcnt)
+
+        start = vmpa(4, vmpa.VMPA_NO_VIRTUAL)
+        covered = mrange(start, 4) # 'BBBB'
+
+        rcnt = RestrictedContent(fcnt, covered)
+        self.assertIsNotNone(rcnt)
+
+        expected = hashlib.sha256(b'BBBB').hexdigest()
+
+        self.assertEqual(rcnt.get_checksum(), expected)