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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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/*
 * $Id: HMACParameterSpec.java,v 1.4 2005/05/10 16:40:17 mullan Exp $
 */
package javax.xml.crypto.dsig.spec;

import javax.xml.crypto.dsig.SignatureMethod;


Parameters for the 
XML Signature HMAC Algorithm. The parameters include an optional output
length which specifies the MAC truncation length in bits. The resulting
HMAC will be truncated to the specified number of bits. If the parameter is
not specified, then this implies that all the bits of the hash are to be
output. The XML Schema Definition of the HMACOutputLength
element is defined as:


<element name="HMACOutputLength" minOccurs="0" type="ds:HMACOutputLengthType"/>
<simpleType name="HMACOutputLengthType">
  <restriction base="integer"/>
</simpleType>



Author:Sean Mullan, JSR 105 Expert Group
See Also:
Since:1.6
/**
 * Parameters for the <a href="http://www.w3.org/TR/xmldsig-core/#sec-MACs">
 * XML Signature HMAC Algorithm</a>. The parameters include an optional output
 * length which specifies the MAC truncation length in bits. The resulting
 * HMAC will be truncated to the specified number of bits. If the parameter is
 * not specified, then this implies that all the bits of the hash are to be
 * output. The XML Schema Definition of the <code>HMACOutputLength</code>
 * element is defined as:
 * <pre><code>
 * &lt;element name="HMACOutputLength" minOccurs="0" type="ds:HMACOutputLengthType"/&gt;
 * &lt;simpleType name="HMACOutputLengthType"&gt;
 *   &lt;restriction base="integer"/&gt;
 * &lt;/simpleType&gt;
 * </code></pre>
 *
 * @author Sean Mullan
 * @author JSR 105 Expert Group
 * @since 1.6
 * @see SignatureMethod
 * @see <a href="http://www.ietf.org/rfc/rfc2104.txt">RFC 2104</a>
 */
public final class HMACParameterSpec implements SignatureMethodParameterSpec {

    private int outputLength;

    
Creates an HMACParameterSpec with the specified truncation
length.

Params:
  • outputLength – the truncation length in number of bits
/**
     * Creates an <code>HMACParameterSpec</code> with the specified truncation
     * length.
     *
     * @param outputLength the truncation length in number of bits
     */
    public HMACParameterSpec(int outputLength) {
        this.outputLength = outputLength;
    }

    
Returns the truncation length.

Returns:the truncation length in number of bits
/**
     * Returns the truncation length.
     *
     * @return the truncation length in number of bits
     */
    public int getOutputLength() {
        return outputLength;
    }
}