Readme typo fix, sha512 benchmark, comment fix, better random for ECC

src/Crypt/CryptHash.py

@@ -9,10 +9,28 @@ def sha1sum(file, blocksize=65536):
 	return hash.hexdigest()
 
 
+def sha512sum(file, blocksize=65536):
+	if hasattr(file, "endswith"): # Its a string open it
+		file = open(file, "rb")
+	hash = hashlib.sha512()
+	for block in iter(lambda: file.read(blocksize), ""):
+		hash.update(block)
+	return hash.hexdigest()
+
+
 if __name__ == "__main__":
 	import cStringIO as StringIO
 	a = StringIO.StringIO()
 	a.write("hello!")
 	a.seek(0)
 	print hashlib.sha1("hello!").hexdigest()
-	print sha1sum(a)
+	print sha1sum(a)
+
+	import time
+	s = time.time()
+	print sha1sum(open("F:\\Temp\\bigfile")),
+	print time.time()-s
+
+	s = time.time()
+	print sha512sum(open("F:\\Temp\\bigfile")),
+	print time.time()-s