uTools-Manuals/docs/java/javax/xml/crypto/dsig/spec/HMACParameterSpec.html

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     javax.xml.crypto.dsig.spec 
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<h2 class="title" title="Class HMACParameterSpec">Class HMACParameterSpec</h2>
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         All Implemented Interfaces: 
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<span><a href="../../../../../java/security/spec/AlgorithmParameterSpec.html" title="java.security.spec中的接口">AlgorithmParameterSpec</a> ， <a href="../../../../../javax/xml/crypto/dsig/spec/SignatureMethodParameterSpec.html" title="javax.xml.crypto.dsig.spec中的接口">SignatureMethodParameterSpec</a></span>
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<hr/> <br/> <pre>public final class <span class="typeNameLabel">HMACParameterSpec</span>
extends <a href="../../../../../java/lang/Object.html" title="class in java.lang">Object</a>
implements <a href="../../../../../javax/xml/crypto/dsig/spec/SignatureMethodParameterSpec.html" title="interface in javax.xml.crypto.dsig.spec">SignatureMethodParameterSpec</a></pre>
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<span>参数为<a href="http://www.w3.org/TR/xmldsig-core/#sec-MACs">XML Signature HMAC Algorithm</a> 。</span>
<span>这些参数包括一个可选的输出长度，它以位表示MAC截断长度。</span>
<span>所产生的HMAC将被截断到指定的位数。</span>
<span>如果未指定参数，则这意味着要输出散列的所有位。</span>
<span><code>HMACOutputLength</code>元素的XML模式定义定义为：</span>
<pre>  <span><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></span> </pre>
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<span class="simpleTagLabel">从以下版本开始：</span>
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         1.6 
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<span class="seeLabel">另请参见：</span>
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<span><a href="../../../../../javax/xml/crypto/dsig/SignatureMethod.html" title="javax.xml.crypto.dsig中的接口"><code>SignatureMethod</code></a> ， <a href="http://www.ietf.org/rfc/rfc2104.txt">RFC 2104</a></span>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../javax/xml/crypto/dsig/spec/HMACParameterSpec.html#HMACParameterSpec-int-">HMACParameterSpec</a></span>(int outputLength)</code>
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              创建具有 
             <code>HMACParameterSpec</code>截断长度的HMACParameterSpec。 
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../javax/xml/crypto/dsig/spec/HMACParameterSpec.html#getOutputLength--">getOutputLength</a></span>()</code>
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              返回截断长度。 
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<li class="blockList"> <h4>HMACParameterSpec</h4> <pre>public HMACParameterSpec(int outputLength)</pre>
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            创建具有 
           <code>HMACParameterSpec</code>截断长度的HMACParameterSpec。 
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<span class="paramLabel">参数</span>
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<code>outputLength</code> - 位数的截断长度 
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<li class="blockList"> <h4>getOutputLength</h4> <pre>public int getOutputLength()</pre>
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            返回截断长度。 
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<span class="returnLabel">结果</span>
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             截断长度的位数 
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