Package tech.mgl.core.utils.security

Class MGL_Rfc2898DeriveBytes

java.lang.Object

tech.mgl.core.utils.security.MGL_Rfc2898DeriveBytes

public class MGL_Rfc2898DeriveBytes
extends Object

salt + md5这样的时候用的 但是目前还不采用 因为有人研究过此方法也并不安全 ClassName: Rfc2898DeriveBytes

Author:

hotpot ...

Constructor Summary

Constructors

Constructor	Description
MGL_Rfc2898DeriveBytes(byte[] password, byte[] salt, int iterations)	Creates new instance.
MGL_Rfc2898DeriveBytes(String password, byte[] salt, int iterations)	Creates new instance.
MGL_Rfc2898DeriveBytes(String password, int saltSize)	Creates new instance.
MGL_Rfc2898DeriveBytes(String password, int saltSize, int iterations)	Creates new instance.

Method Summary

Modifier and Type	Method	Description
static String	generateSalt(int size)	Generate random Salt
byte[]	getBytes(int cb)	Returns a pseudo-random key from a data, salt and iteration count.
byte[]	getSalt()
String	getSaltAsString()
static byte[]	randomSalt(int size)

Methods inherited from class java.lang.Object

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

Constructor Details

MGL_Rfc2898DeriveBytes

public MGL_Rfc2898DeriveBytes(byte[] password,
 byte[] salt,
 int iterations)
                       throws NoSuchAlgorithmException,
InvalidKeyException

Creates new instance.

Parameters:

password - The password used to derive the key.

salt - The key salt used to derive the key.

iterations - The number of iterations for the operation.

Throws:

NoSuchAlgorithmException - HmacSHA1 algorithm cannot be found.

InvalidKeyException - Salt must be 8 bytes or more. -or- Password cannot be null.

MGL_Rfc2898DeriveBytes

public MGL_Rfc2898DeriveBytes(String password,
 int saltSize,
 int iterations)
                       throws NoSuchAlgorithmException,
InvalidKeyException

Creates new instance.

Parameters:

password - The password used to derive the key.

saltSize - The key salt used to derive the key.

iterations - The number of iterations for the operation.

Throws:

NoSuchAlgorithmException - HmacSHA1 algorithm cannot be found.

InvalidKeyException - Salt must be 8 bytes or more. -or- Password cannot be null.

MGL_Rfc2898DeriveBytes

public MGL_Rfc2898DeriveBytes(String password,
 int saltSize)
                       throws NoSuchAlgorithmException,
InvalidKeyException,
UnsupportedEncodingException

Creates new instance.

Parameters:

password - The password used to derive the key.

saltSize - The key salt used to derive the key.

Throws:

NoSuchAlgorithmException - HmacSHA1 algorithm cannot be found.

InvalidKeyException - Salt must be 8 bytes or more. -or- Password cannot be null.

UnsupportedEncodingException

MGL_Rfc2898DeriveBytes

public MGL_Rfc2898DeriveBytes(String password,
 byte[] salt,
 int iterations)
                       throws InvalidKeyException,
NoSuchAlgorithmException,
UnsupportedEncodingException

Creates new instance.

Parameters:

password - The password used to derive the key.

salt - The key salt used to derive the key.

iterations - The number of iterations for the operation.

Throws:

NoSuchAlgorithmException - HmacSHA1 algorithm cannot be found.

InvalidKeyException - Salt must be 8 bytes or more. -or- Password cannot be null.

UnsupportedEncodingException - UTF-8 encoding is not supported.

Method Details

getSalt

public byte[] getSalt()

getSaltAsString

public String getSaltAsString()

getBytes

public byte[] getBytes(int cb)

Returns a pseudo-random key from a data, salt and iteration count.

Parameters:

cb - Number of bytes to return.

Returns:

Byte array.

randomSalt

public static byte[] randomSalt(int size)

generateSalt

public static String generateSalt(int size)

Generate random Salt

Parameters:

size -

Returns: