Password

java.lang.Object
- org.mozilla.jss.util.Password

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PasswordCallback
```
public class Password
extends java.lang.Object
implements PasswordCallback, java.lang.Cloneable, java.io.Serializable
```
Stores a password. clear should be called when the password is no longer needed so that the sensitive information is not left in memory.
A Password can be used as a hard-coded PasswordCallback.

See Also:
PasswordCallback, Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from interface org.mozilla.jss.util.PasswordCallback
  PasswordCallback.GiveUpException

Constructor Summary

Constructors
Constructor and Description

Password(char[] pw)
Creates a Password from a char array, then wipes the char array.

Constructors
Constructor and Description
`Password(char[] pw)` Creates a Password from a char array, then wipes the char array.

Method Summary

Methods
Modifier and Type	Method and Description
`static byte[]`	`charToByte(char[] charArray)` Converts a char array to a null-terminated byte array using a standard encoding, which is currently UTF8.
`void`	`clear()` Clears the password so that sensitive data is no longer present in memory.
`java.lang.Object`	`clone()` Clones the password.
`boolean`	`equals(java.lang.Object obj)` Compares this password to another and returns true if they are the same.
`protected void`	`finalize()` The finalizer clears the sensitive information before releasing it to the garbage collector, but it should have been cleared manually before this point anyway.
`char[]`	`getCharCopy()` Returns a char array that is a copy of the password.
`char[]`	`getChars()` Returns the char array underlying this password.
`Password`	`getPasswordAgain(PasswordCallbackInfo info)` An implementation of `PasswordCallback.getPasswordAgain`.
`Password`	`getPasswordFirstAttempt(PasswordCallbackInfo info)` An implementation of `PasswordCallback.getPasswordFirstAttempt`.
`static Password`	`readPasswordFromConsole()` Reads a password from the console with echo disabled.
`static void`	`wipeBytes(byte[] byteArray)` Wipes a byte array by setting all its elements to zero.
`static void`	`wipeChars(char[] charArray)` Wipes a char array by setting all its elements to zero.

Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Password
```
public Password(char[] pw)
```
    Creates a Password from a char array, then wipes the char array.
    
    Parameters:
    pw - A char[] containing the password. This array will be cleared (set to zeroes) by the constructor.
- Method Detail
  - getPasswordFirstAttempt
```
public Password getPasswordFirstAttempt(PasswordCallbackInfo info)
                                 throws PasswordCallback.GiveUpException
```
    An implementation of PasswordCallback.getPasswordFirstAttempt. This allows a Password object to be treated as a PasswordCallback. This method simply returns a clone of the password.
    
    Specified by:
    
    getPasswordFirstAttempt in interface PasswordCallback
    
    Parameters:
    info - Information about the token that is being logged into.
    
    Returns:
    A copy of the password. The caller is responsible for clearing this copy.
    
    Throws:
    
    PasswordCallback.GiveUpException - If the callback does not want to supply a password.
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Compares this password to another and returns true if they are the same.
    
    Overrides:
    
    equals in class java.lang.Object
  - getPasswordAgain
```
public Password getPasswordAgain(PasswordCallbackInfo info)
                          throws PasswordCallback.GiveUpException
```
    An implementation of PasswordCallback.getPasswordAgain. This allows a Password object to be used as a PasswordCallback. This method is only called after a call to getPasswordFirstAttempt returned the wrong password. This means the password is incorrect and there's no sense returning it again, so a GiveUpException is thrown.
    
    Specified by:
    
    getPasswordAgain in interface PasswordCallback
    
    Parameters:
    info - Information about the token that is being logged into.
    
    Returns:
    The password. This password object is owned by and will be cleared by the caller.
    
    Throws:
    
    PasswordCallback.GiveUpException - If the callback does not want to supply a password. This may often be the case if the first attempt failed.
  - getChars
```
public char[] getChars()
```
    Returns the char array underlying this password. It must not be modified in any way.
  - getCharCopy
```
public char[] getCharCopy()
```
    Returns a char array that is a copy of the password. The caller is responsible for wiping the returned array, for example using wipeChars.
  - clear
```
public void clear()
```
    Clears the password so that sensitive data is no longer present in memory. This should be called as soon as the password is no longer needed.
  - clone
```
public java.lang.Object clone()
```
    Clones the password. The resulting clone will be completely independent of the parent, which means it will have to be separately cleared.
    
    Overrides:
    
    clone in class java.lang.Object
  - finalize
```
protected void finalize()
                 throws java.lang.Throwable
```
    The finalizer clears the sensitive information before releasing it to the garbage collector, but it should have been cleared manually before this point anyway.
    
    Overrides:
    
    finalize in class java.lang.Object
    
    Throws:
    
    java.lang.Throwable
  - charToByte
```
public static byte[] charToByte(char[] charArray)
```
    Converts a char array to a null-terminated byte array using a standard encoding, which is currently UTF8. The caller is responsible for clearing the copy (with wipeBytes, for example).
    
    Parameters:
    charArray - A character array, which should not be null. It will be wiped with zeroes.
    
    Returns:
    A copy of the charArray, converted from Unicode to UTF8. It is the responsibility of the caller to clear the output byte array; wipeBytes is ideal for this purpose.
    See Also:
    wipeBytes(byte[])
  - wipeBytes
```
public static void wipeBytes(byte[] byteArray)
```
    Wipes a byte array by setting all its elements to zero. null must not be passed in.
  - wipeChars
```
public static void wipeChars(char[] charArray)
```
    Wipes a char array by setting all its elements to zero. null must not be passed in.
  - readPasswordFromConsole
```
public static Password readPasswordFromConsole()
                                        throws PasswordCallback.GiveUpException
```
    Reads a password from the console with echo disabled. This is a blocking call which will return after the user types a newline. It only works with ASCII password characters. The call is synchronized because it alters terminal settings in a way that is not thread-safe.
    
    Returns:
    The password the user entered at the command line.
    
    Throws:
    
    PasswordCallback.GiveUpException - If the user enters no password (just hits <enter>).

Class Password

Nested Class Summary

Nested classes/interfaces inherited from interface org.mozilla.jss.util.PasswordCallback

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Password

Method Detail

getPasswordFirstAttempt

equals

getPasswordAgain

getChars

getCharCopy

clear

clone

finalize

charToByte

wipeBytes

wipeChars

readPasswordFromConsole