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copied!<p>Treat the following as pseudo-code..</p> <pre><code>try: from hashlib import sha as hasher except ImportError: # You could probably exclude the try/except bit, # but older Python distros dont have hashlib. try: import sha as hasher except ImportError: import md5 as hasher def hash_password(password): """Returns the hashed version of a string """ return hasher.new( str(password) ).hexdigest() def load_auth_file(path): """Loads a comma-seperated file. Important: make sure the username doesn't contain any commas! """ # Open the file, or return an empty auth list. try: f = open(path) except IOError: print "Warning: auth file not found" return {} ret = {} for line in f.readlines(): split_line = line.split(",") if len(split_line) > 2: print "Warning: Malformed line:" print split_line continue # skip it.. else: username, password = split_line ret[username] = password #end if #end for return ret def main(): auth_file = "/home/blah/.myauth.txt" u = raw_input("Username:") p = raw_input("Password:") # getpass is probably better.. if auth_file.has_key(u.strip()): if auth_file[u] == hash_password(p): # The hash matches the stored one print "Welcome, sir!" </code></pre> <p>Instead of using a comma-separated file, I would recommend using SQLite3 (which could be used for other settings and such.</p> <p>Also, remember that this isn't very secure - if the application is local, evil users could probably just replace the <code>~/.myauth.txt</code> file.. Local application auth is difficult to do well. You'll have to encrypt any data it reads using the users password, and generally be very careful.</p>

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