iaik.ixsil.algorithms

Class DigestAlgorithmImplSHA1

java.lang.Object

iaik.ixsil.algorithms.Algorithm

iaik.ixsil.algorithms.DigestAlgorithm

iaik.ixsil.algorithms.DigestAlgorithmImplSHA1

public class DigestAlgorithmImplSHA1
extends DigestAlgorithm

Provides an digest algorithm implementation of the SHA-1 message digest algorithm, as it has been specified in XML Signature, Message Digests. The Java Cryptography Architecture API is used for implementing the cryptographic computations.

Field Summary

Fields

Modifier and Type	Field and Description
protected static java.lang.String	DEFAULT_ALGORITHM_URI_ The default algorithm URI for this algorithm implementation.
protected static java.lang.String	SHA1_JCA_ALGID_ The identifier used for the SHA-1 algorithm within the Java Cryptography Architecture.

Fields inherited from class iaik.ixsil.algorithms.DigestAlgorithm

input_

Fields inherited from class iaik.ixsil.algorithms.Algorithm

uri_

Constructor Summary

Constructors

Constructor and Description
DigestAlgorithmImplSHA1() Standard constructor.

Method Summary

Modifier and Type	Method and Description
java.io.InputStream	digest() Computes the digest for the input data previously specified by means of method DigestAlgorithm.setInput(java.io.InputStream).
org.w3c.dom.Element	toElement(org.w3c.dom.Document signatureDOMDoc) Returns the DOM element representation of the algorithm.

Methods inherited from class iaik.ixsil.algorithms.DigestAlgorithm

setInput

Methods inherited from class iaik.ixsil.algorithms.Algorithm

getURI, setParameters, setURI

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_ALGORITHM_URI_

protected static final java.lang.String DEFAULT_ALGORITHM_URI_

The default algorithm URI for this algorithm implementation.

See Also:

Constant Field Values

SHA1_JCA_ALGID_

protected static final java.lang.String SHA1_JCA_ALGID_

The identifier used for the SHA-1 algorithm within the Java Cryptography Architecture.

Constructor Detail

DigestAlgorithmImplSHA1

public DigestAlgorithmImplSHA1()

Standard constructor. Sets the default value for the algorithm URI to http://www.w3.org/2000/09/xmldsig#sha1.

Method Detail

toElement

public org.w3c.dom.Element toElement(org.w3c.dom.Document signatureDOMDoc)
                              throws AlgorithmException

Returns the DOM element representation of the algorithm.

Specified by:

toElement in class Algorithm

Parameters:

signatureDOMDoc - The DOM document which should be used to create necessary DOM nodes.

Returns:

the DOM element representation of the algorithm.

Throws:

AlgorithmException - if no identifying URI has been specified for this algorithm.

digest

public java.io.InputStream digest()
                           throws AlgorithmException

Computes the digest for the input data previously specified by means of method DigestAlgorithm.setInput(java.io.InputStream).

Specified by:

digest in class DigestAlgorithm

Returns:

the digest bytes for the specified input. This value will NOT be base64 encoded.

Throws:

AlgorithmException - if no input has been specified for the digest algorithm, or if computing the message digest fails for any reason.