com.cafesoft.core.util
Class UnixCrypt

java.lang.Object
  |
  +--com.cafesoft.core.util.UnixCrypt

public class UnixCrypt

extends Object

UnixCrypt is a utility to encode passwords using the Unix crypt algorithm. This method of password encoding is not recommened, rather it is provided for convenience and backwards compatibility. Most current Unix systems support MD5 algorithms, but they are operating system specific.

Contains static methods to encrypt and compare passwords with Unix encrypted passwords.

See John Dumas's Java Crypt page for the original source.

Method Summary

static String	crypt(String original) Encrypt a password given the cleartext password.
static String	crypt(String salt, String original) Encrypt a password given the cleartext password and a "salt".
static boolean	matches(String encryptedPassword, String enteredPassword) Check that enteredPassword encrypts to encryptedPassword.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

crypt

public static final String crypt(String salt,
                                 String original)

Encrypt a password given the cleartext password and a "salt".

Parameters:

salt - A two-character string representing the salt used to iterate the encryption engine in lots of different ways. If you are generating a new encryption then this value should be randomised.

original - The password to be encrypted.

Returns:

A string consisting of the 2-character salt followed by the encrypted password.

crypt

public static final String crypt(String original)

Encrypt a password given the cleartext password. This method generates a random salt using the 'java.util.Random' class.

Parameters:

original - The password to be encrypted.

Returns:

A string consisting of the 2-character salt followed by the encrypted password.

matches

public static final boolean matches(String encryptedPassword,
                                    String enteredPassword)

Check that enteredPassword encrypts to encryptedPassword.

Parameters:

encryptedPassword - The encryptedPassword. The first two characters are assumed to be the salt. This string would be the same as one found in a Unix /etc/passwd file.

enteredPassword - The password as entered by the user (or otherwise aquired).

Returns:

true if the password should be considered correct.