added tarsum

added simple python tar-file-contents-hasher

tarsum.py

@@ -0,0 +1,33 @@
+#!/usr/bin/python3 -u
+import tarfile
+import sys
+import hashlib
+#ask for parameters
+#1 = hashtype or md5 by defualt
+#2 = filename of tarfile
+try:
+    if len(sys.argv) == 3:
+        hashtype=sys.argv[1]
+        tarfilename=sys.argv[2]
+    else:
+        hashtype="md5"
+        tarfilename=sys.argv[1]
+
+    h=hashlib.new(hashtype)
+    tf=tarfile.open(tarfilename,'r')
+#print usage if anything goes wrong
+except Exception as e :
+    print(e)
+    print("usage: tarsum.py [hashtype] tarfile.tgz")
+    print("hashtype can be:")
+    print(hashlib.algorithms_available)
+    print("md5 is default")
+    exit(1)
+
+for file in tf:
+    if file.isfile():
+        h=hashlib.new(hashtype)
+        extracted_file=tf.extractfile(file)
+        for chunk in iter(lambda: extracted_file.read(h.block_size),b''):
+            h.update(chunk)
+        print("{1}  {0}".format(file.name,h.hexdigest()))