Old school password cracker

This code was taken from the book Violent Python

Author: geekcomputers

password_cracker.py

@@ -0,0 +1,35 @@
+# Script Name	: password_cracker.py
+# Author		: Craig Richards
+# Created		: 20 May 2013
+# Last Modified	:
+# Version		: 1.0
+
+# Modifications	:
+
+# Description	: Old school password cracker using python
+
+import crypt	# Import the module
+
+def testPass(cryptPass):	# Start the function
+  salt = cryptPass[0:2]
+  dictFile=open('dictionary.txt','r')	# Open the dictionary file
+  for word in dictFile.readlines():	# Scan through the file
+    word=word.strip('\n')
+    cryptWord=crypt.crypt(word,salt)	# Check for password in the file
+    if (cryptWord == cryptPass):
+      print "[+] Found Password: "+word+"\n"
+      return
+  print "[-] Password Not Found.\n"
+  return
+
+def main():
+  passFile = open('passwords.txt')		# Open the password file
+  for line in passFile.readlines():	# Read through the file
+    if ":" in line:
+      user=line.split(':')[0]
+      cryptPass = line.split(':')[1].strip(' ') # Prepare the user name etc
+      print "[*] Cracking Password For: "+user 
+      testPass(cryptPass)				# Call it to crack the users password
+
+if __name__ == "__main__":
+  main()