Add blake2b hashing support

autobuild/autobuild_tool_edit.py

@@ -247,7 +247,7 @@ class Archive(InteractiveCommand):
     ARGUMENTS = ['format', 'hash_algorithm', 'platform']
 
     ARG_DICT = {'format':         {'help': 'Archive format (e.g zip or tbz2)'},
-                'hash_algorithm': {'help': 'The algorithm for computing the archive hash (e.g. md5)'},
+                'hash_algorithm': {'help': 'The algorithm for computing the archive hash (e.g. md5, blake2b)'},
                 'platform':       {'help': 'The name of the platform archive to be configured'}
                 }
 

autobuild/autobuild_tool_package.py

@@ -366,18 +366,15 @@ def _add_file_to_zip_archive(zip_file, unnormalized_file, archive_filename, adde
 
 
 def _print_hash(filename: str, results: dict):
-    fp = open(filename, 'rb')
-    m = hashlib.md5()
-    while True:
-        d = fp.read(65536)
-        if not d:
-            break
-        m.update(d)
+    md5 = common.compute_md5(filename)
+    blake2b = common.compute_blake2b(filename)
+
     # printing unconditionally on stdout for backward compatibility
     # the Linden Lab build scripts no longer rely on this
     # (they use the --results-file option instead)
-    print("md5    %s" % m.hexdigest())
-    results['autobuild_package_md5'] = m.hexdigest()
+    print("md5    %s" % md5)
+    results['autobuild_package_md5'] = md5
+    results['autobuild_package_blake2b'] = blake2b
     # Not using logging, since this output should be produced unconditionally on stdout
     # Downstream build tools utilize this output
 

autobuild/common.py

@@ -338,6 +338,25 @@ def compute_md5(path):
     return hasher.hexdigest()
 
 
+def compute_blake2b(path):
+    """
+    Returns the blake2b sum for the given file.
+    """
+    import hashlib
+
+    try:
+        stream = open(path, 'rb')
+    except IOError as err:
+        raise AutobuildError("Can't compute blake2b for %s: %s" % (path, err))
+
+    try:
+        hasher = hashlib.blake2b(stream.read())
+    finally:
+        stream.close()
+
+    return hasher.hexdigest()
+
+
 def split_tarname(pathname):
     """
     Given a tarfile pathname of the form:

autobuild/hash_algorithms.py

@@ -64,3 +64,8 @@ def verify_hash(hash_algorithm, pathname, hash):
 @hash_algorithm("md5")
 def _verify_md5(pathname, hash):
     return common.compute_md5(pathname) == hash
+
+@hash_algorithm("blake2b")
+def _verify_blake2b(pathname, hash):
+    return common.compute_blake2b(pathname) == hash
+

tests/test_package.py

@@ -103,8 +103,9 @@ def test_results(self):
 autobuild_package_platform="%s"
 autobuild_package_filename="%s"
 autobuild_package_md5="%s"
+autobuild_package_blake2b="%s"
 $''' % ('test1', re.escape(os.path.join(self.data_dir, "package-test", "autobuild-package.xml")),
-        "common", re.escape(self.tar_name), "[0-9a-f]{32}")
+        "common", re.escape(self.tar_name), "[0-9a-f]{32}", "[0-9a-f]{128}")
         expected=re.compile(expected_results_regex, flags=re.MULTILINE)
         assert os.path.exists(results_output), "results file not found: %s" % results_output
         actual_results = open(results_output,'r').read()
@@ -125,6 +126,7 @@ def test_results_json(self):
             self.assertEqual(results["autobuild_package_platform"], "common")
             self.assertEqual(results["autobuild_package_filename"], self.tar_name)
             self.assertEqual(len(results["autobuild_package_md5"]), 32)
+            self.assertEqual(len(results["autobuild_package_blake2b"]), 128)
 
     def test_package_other_version(self):
         # read the existing metadata file and update stored package version