org.apache.xml.security.utils
Class JavaUtils

java.lang.Object
  org.apache.xml.security.utils.JavaUtils

public class JavaUtils
extends Object

A collection of different, general-purpose methods for JAVA-specific things

Author:

Christian Geuer-Pollmann

Method Summary

static void	checkRegisterPermission() Throws a SecurityException if a security manager is installed and the caller is not allowed to register an implementation of an algorithm, transform, or other security sensitive XML Signature function.
static byte[]	convertDsaASN1toXMLDSIG(byte[] asn1Bytes, int size) Converts an ASN.1 DSA value to a XML Signature DSA Value.
static byte[]	convertDsaXMLDSIGtoASN1(byte[] xmldsigBytes, int size) Converts an XML Signature DSA Value to a ASN.1 DSA value.
static byte[]	getBytesFromFile(String fileName) Method getBytesFromFile
static byte[]	getBytesFromStream(InputStream inputStream) This method reads all bytes from the given InputStream till EOF and returns them as a byte array.
static void	writeBytesToFilename(String filename, byte[] bytes) Method writeBytesToFilename

Methods inherited from class java.lang.Object

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

Method Detail

getBytesFromFile

public static byte[] getBytesFromFile(String fileName)
                               throws FileNotFoundException,
                                      IOException

Method getBytesFromFile

Parameters:

fileName -

Returns:

the bytes read from the file

Throws:

FileNotFoundException

IOException

writeBytesToFilename

public static void writeBytesToFilename(String filename,
                                        byte[] bytes)

Method writeBytesToFilename

Parameters:

filename -

bytes -

getBytesFromStream

public static byte[] getBytesFromStream(InputStream inputStream)
                                 throws IOException

This method reads all bytes from the given InputStream till EOF and returns them as a byte array.

Parameters:

inputStream -

Returns:

the bytes read from the stream

Throws:

FileNotFoundException

IOException

convertDsaASN1toXMLDSIG

public static byte[] convertDsaASN1toXMLDSIG(byte[] asn1Bytes,
                                             int size)
                                      throws IOException

Converts an ASN.1 DSA value to a XML Signature DSA Value. The JCE DSA Signature algorithm creates ASN.1 encoded (r,s) value pairs (see section 2.2.2 of RFC 3279); the XML Signature requires the core BigInteger values.

Parameters:

asn1Bytes - the ASN.1 encoded bytes

size - size of r and s in bytes

Returns:

the XML Signature encoded bytes

Throws:

IOException - if the bytes are not encoded correctly

See Also:

6.4.1 DSA

convertDsaXMLDSIGtoASN1

public static byte[] convertDsaXMLDSIGtoASN1(byte[] xmldsigBytes,
                                             int size)
                                      throws IOException

Converts an XML Signature DSA Value to a ASN.1 DSA value. The JCE DSA Signature algorithm creates ASN.1 encoded (r,s) value pairs (see section 2.2.2 of RFC 3279); the XML Signature requires the core BigInteger values.

Parameters:

xmldsigBytes - the XML Signature encoded bytes

size - size of r and s in bytes

Returns:

the ASN.1 encoded bytes

Throws:

IOException - if the bytes are not encoded correctly

See Also:

6.4.1 DSA

checkRegisterPermission

public static void checkRegisterPermission()

Throws a SecurityException if a security manager is installed and the caller is not allowed to register an implementation of an algorithm, transform, or other security sensitive XML Signature function.

Throws:

SecurityException - if a security manager is installed and the caller has not been granted the "org.apache.xml.security.register" SecurityPermission