Package org.apache.wss4j.common.util

Class KeyUtils

java.lang.Object

org.apache.wss4j.common.util.KeyUtils

public final class KeyUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final String	RSA_ECB_OAEPWITH_SHA1_AND_MGF1_PADDING

Method Summary

Modifier and Type	Method	Description
static byte[]	generateDigest(byte[] inputBytes)	Generate a (SHA1) digest of the input bytes.
static Cipher	getCipherInstance(String cipherAlgo)	Translate the "cipherAlgo" URI to a JCE ID, and return a javax.crypto.Cipher instance of this type.
static Cipher	getCipherInstance(String cipherAlgo, String provider)	Translate the "cipherAlgo" URI to a JCE ID, and request a javax.crypto.Cipher instance of this type from the given provider.
static KeyGenerator	getKeyGenerator(String algorithm)
static int	getKeyLength(String algorithm)	Returns the length of the key in # of bytes.
static SecretKey	prepareSecretKey(String algorithm, byte[] rawKey)	Convert the raw key bytes into a SecretKey object of type algorithm.

Methods inherited from class java.lang.Object

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

Field Details

RSA_ECB_OAEPWITH_SHA1_AND_MGF1_PADDING

public static final String RSA_ECB_OAEPWITH_SHA1_AND_MGF1_PADDING

See Also:

• Constant Field Values

Method Details

getKeyLength

public static int getKeyLength(String algorithm)
                        throws WSSecurityException

Returns the length of the key in # of bytes. For the HMAC algorithms it guesses a default value that can be used based on the algorithm.

Parameters:

algorithm - the URI of the algorithm. See http://www.w3.org/TR/xmlenc-core1/

Returns:

the key length

Throws:

WSSecurityException

prepareSecretKey

public static SecretKey prepareSecretKey(String algorithm,
 byte[] rawKey)

Convert the raw key bytes into a SecretKey object of type algorithm.

getKeyGenerator

public static KeyGenerator getKeyGenerator(String algorithm)
                                    throws WSSecurityException

Throws:

WSSecurityException

getCipherInstance

public static Cipher getCipherInstance(String cipherAlgo)
                                throws WSSecurityException

Translate the "cipherAlgo" URI to a JCE ID, and return a javax.crypto.Cipher instance of this type.

Parameters:

cipherAlgo - The cipher in it's WSS URI form, ref. https://www.w3.org/TR/xmlenc-core1/#sec-Algorithms

Throws:

WSSecurityException

getCipherInstance

public static Cipher getCipherInstance(String cipherAlgo,
 String provider)
                                throws WSSecurityException

Translate the "cipherAlgo" URI to a JCE ID, and request a javax.crypto.Cipher instance of this type from the given provider.

Parameters:

cipherAlgo - The cipher in it's WSS URI form, ref. https://www.w3.org/TR/xmlenc-core1/#sec-Algorithms

provider - The provider which shall instantiate the cipher.

Throws:

WSSecurityException

generateDigest

public static byte[] generateDigest(byte[] inputBytes)
                             throws WSSecurityException

Generate a (SHA1) digest of the input bytes. The MessageDigest instance that backs this method is cached for efficiency.

Parameters:

inputBytes - the bytes to digest

Returns:

the digest of the input bytes

Throws:

WSSecurityException