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534 lines
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<div class="header">
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javax.crypto
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<h2 class="title" title="Class KeyGenerator">Class KeyGenerator</h2>
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</div><div class="contentContainer">
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<ul class="inheritance">
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<li><a href="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
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<li>
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<ul class="inheritance">
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<li>javax.crypto.KeyGenerator</li>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">KeyGenerator</span>
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extends <a href="../../java/lang/Object.html" title="class in java.lang">Object</a></pre>
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<div class="block">
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<span>该类提供了一个秘密（对称）密钥生成器的功能。</span>
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<p> <span>密钥生成器使用此类的<code>getInstance</code>类方法之一构建。</span> </p>
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<p> <span>KeyGenerator对象是可重用的，即在生成一个密钥之后，可以重新使用相同的KeyGenerator对象来生成其他密钥。</span> </p>
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<p> <span>有两种方式来生成一个密钥：以一种算法无关的方式，并以一种算法特定的方式。</span> <span>两者之间的唯一区别是对象的初始化：</span> </p>
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<ul>
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<li> <span><b>独立于算法的初始化</b></span> <p> <span>所有密钥生成器共享一个<i>密钥长度</i>的概念和<i>随机源</i> 。</span> <span>这个KeyGenerator类中有一个<a href="../../javax/crypto/KeyGenerator.html#init-int-java.security.SecureRandom-"><code>init</code></a>方法，它接受这两个普遍共享的参数类型。</span> <span>还有一个只需要一个<code>keysize</code>参数，并且使用最高优先级安装的提供程序的SecureRandom实现作为随机源（或者如果没有一个已安装的提供程序提供SecureRandom实现，则是系统提供的随机源），以及一个只是一个随机的来源。</span> </p><p> <span>由于在调用上述独立于算法的<code>init</code>方法时没有指定其他参数，因此提供者如何处理与每个密钥相关联的特定于算法的参数（如果有的话）。</span> </p></li>
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<li> <span><b>特定于算法的初始化</b></span> <p> <span>对于一组特定于算法的参数已存在的情况，有两个<a href="../../javax/crypto/KeyGenerator.html#init-java.security.spec.AlgorithmParameterSpec-"><code>init</code></a>方法具有<code>AlgorithmParameterSpec</code>参数。</span> <span>一个也有一个<code>SecureRandom</code>参数，而另一个使用最高优先级安装的提供程序的SecureRandom实现作为随机源（或者系统提供的随机源，如果没有一个已安装的提供程序提供SecureRandom实现）。</span> </p></li>
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</ul>
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<p> <span>如果客户端没有显式初始化KeyGenerator（通过调用<code>init</code>方法），则每个提供程序都必须提供（并记录）默认的初始化。</span> </p>
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<p> <span>Java平台的每个实现都需要支持以下标准<code>KeyGenerator</code>算法，其中括号中的键入：</span> </p>
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<ul>
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<li> <span><tt>AES</tt> （128）</span> </li>
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<li> <span><tt>DES</tt> （56）</span> </li>
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<li> <span><tt>DESede</tt> （168）</span> </li>
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<li> <span><tt>HmacSHA1</tt></span> </li>
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<li> <span><tt>HmacSHA256</tt></span> </li>
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</ul>
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<span>这些算法的描述<a href="../../../technotes/guides/security/StandardNames.html#KeyGenerator">KeyGenerator section</a> Java加密体系结构标准算法名称的文档。</span>
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<span>请参阅发行说明文件以了解是否支持其他算法。</span>
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</div>
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<dl>
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<dt>
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<span class="simpleTagLabel">从以下版本开始：</span>
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</dt>
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<dd>
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1.4
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</dd>
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<dt>
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<span class="seeLabel">另请参见：</span>
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</dt>
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<dd>
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<span><a href="../../javax/crypto/SecretKey.html" title="javax.crypto中的接口"><code>SecretKey</code></a></span>
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</dd>
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</dl> </li>
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</ul>
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</div>
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<div class="summary">
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<li class="blockList"><a name="constructor.summary">
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<!-- --> </a> <h3>构造方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">
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<caption>
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<span>构造方法</span>
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<span class="tabEnd"> </span>
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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier</th>
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<th class="colLast" scope="col">Constructor and Description</th>
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<tr class="altColor">
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<td class="colFirst"><code>protected </code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#KeyGenerator-javax.crypto.KeyGeneratorSpi-java.security.Provider-java.lang.String-">KeyGenerator</a></span>(<a href="../../javax/crypto/KeyGeneratorSpi.html" title="class in javax.crypto">KeyGeneratorSpi</a> keyGenSpi, <a href="../../java/security/Provider.html" title="class in java.security">Provider</a> provider, <a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm)</code>
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<div class="block">
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创建一个KeyGenerator对象。
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</div> </td>
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</tr>
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</tbody>
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</table> </li>
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</ul>
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<!-- ========== METHOD SUMMARY =========== -->
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<!-- --> </a> <h3>方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
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<caption>
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<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t1"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr class="altColor" id="i0">
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<td class="colFirst"><code><a href="../../javax/crypto/SecretKey.html" title="interface in javax.crypto">SecretKey</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#generateKey--">generateKey</a></span>()</code>
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<div class="block">
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生成一个秘密密钥。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i1">
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<td class="colFirst"><code><a href="../../java/lang/String.html" title="class in java.lang">String</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#getAlgorithm--">getAlgorithm</a></span>()</code>
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<div class="block">
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返回此
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<code>KeyGenerator</code>对象的算法名称。
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</div> </td>
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</tr>
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<tr class="altColor" id="i2">
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<td class="colFirst"><code>static <a href="../../javax/crypto/KeyGenerator.html" title="class in javax.crypto">KeyGenerator</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#getInstance-java.lang.String-">getInstance</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm)</code>
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<div class="block">
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返回一个
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<code>KeyGenerator</code>对象，该对象为指定的算法生成密钥。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i3">
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<td class="colFirst"><code>static <a href="../../javax/crypto/KeyGenerator.html" title="class in javax.crypto">KeyGenerator</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#getInstance-java.lang.String-java.security.Provider-">getInstance</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm, <a href="../../java/security/Provider.html" title="class in java.security">Provider</a> provider)</code>
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<div class="block">
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返回一个
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<code>KeyGenerator</code>对象，该对象为指定的算法生成密钥。
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</div> </td>
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</tr>
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<tr class="altColor" id="i4">
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<td class="colFirst"><code>static <a href="../../javax/crypto/KeyGenerator.html" title="class in javax.crypto">KeyGenerator</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#getInstance-java.lang.String-java.lang.String-">getInstance</a></span>(<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm, <a href="../../java/lang/String.html" title="class in java.lang">String</a> provider)</code>
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<div class="block">
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返回一个
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<code>KeyGenerator</code>对象，该对象为指定的算法生成密钥。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i5">
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<td class="colFirst"><code><a href="../../java/security/Provider.html" title="class in java.security">Provider</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#getProvider--">getProvider</a></span>()</code>
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<div class="block">
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返回此
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<code>KeyGenerator</code>对象的提供者。
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</div> </td>
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</tr>
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<tr class="altColor" id="i6">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#init-java.security.spec.AlgorithmParameterSpec-">init</a></span>(<a href="../../java/security/spec/AlgorithmParameterSpec.html" title="interface in java.security.spec">AlgorithmParameterSpec</a> params)</code>
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<div class="block">
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使用指定的参数集初始化此密钥生成器。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i7">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#init-java.security.spec.AlgorithmParameterSpec-java.security.SecureRandom-">init</a></span>(<a href="../../java/security/spec/AlgorithmParameterSpec.html" title="interface in java.security.spec">AlgorithmParameterSpec</a> params, <a href="../../java/security/SecureRandom.html" title="class in java.security">SecureRandom</a> random)</code>
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<div class="block">
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使用指定的参数集和用户提供的随机源初始化此密钥生成器。
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</div> </td>
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</tr>
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<tr class="altColor" id="i8">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#init-int-">init</a></span>(int keysize)</code>
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<div class="block">
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初始化此密钥生成器用于某些密钥大小。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i9">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#init-int-java.security.SecureRandom-">init</a></span>(int keysize, <a href="../../java/security/SecureRandom.html" title="class in java.security">SecureRandom</a> random)</code>
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<div class="block">
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使用用户提供的随机源，初始化该密钥生成器以进行某些密钥化。
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</div> </td>
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</tr>
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<tr class="altColor" id="i10">
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<td class="colFirst"><code>void</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/crypto/KeyGenerator.html#init-java.security.SecureRandom-">init</a></span>(<a href="../../java/security/SecureRandom.html" title="class in java.security">SecureRandom</a> random)</code>
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<div class="block">
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初始化此密钥生成器。
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</div> </td>
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<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
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<!-- --> </a> <h3>Methods inherited from class java.lang.<a href="../../java/lang/Object.html" title="class in java.lang">Object</a></h3> <code><a href="../../java/lang/Object.html#clone--">clone</a>, <a href="../../java/lang/Object.html#equals-java.lang.Object-">equals</a>, <a href="../../java/lang/Object.html#finalize--">finalize</a>, <a href="../../java/lang/Object.html#getClass--">getClass</a>, <a href="../../java/lang/Object.html#hashCode--">hashCode</a>, <a href="../../java/lang/Object.html#notify--">notify</a>, <a href="../../java/lang/Object.html#notifyAll--">notifyAll</a>, <a href="../../java/lang/Object.html#toString--">toString</a>, <a href="../../java/lang/Object.html#wait--">wait</a>, <a href="../../java/lang/Object.html#wait-long-">wait</a>, <a href="../../java/lang/Object.html#wait-long-int-">wait</a></code></li>
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<div class="details">
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<!-- --> </a> <h3>构造方法详细信息</h3> <a name="KeyGenerator-javax.crypto.KeyGeneratorSpi-java.security.Provider-java.lang.String-">
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<ul class="blockListLast">
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<li class="blockList"> <h4>KeyGenerator</h4> <pre>protected KeyGenerator(<a href="../../javax/crypto/KeyGeneratorSpi.html" title="class in javax.crypto">KeyGeneratorSpi</a> keyGenSpi,
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<a href="../../java/security/Provider.html" title="class in java.security">Provider</a> provider,
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<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm)</pre>
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<div class="block">
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创建一个KeyGenerator对象。
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</div>
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<dl>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<code>keyGenSpi</code> - 代表
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</dd>
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<dd>
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<code>provider</code> - 提供商
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</dd>
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<dd>
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<code>algorithm</code> - 算法
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</dd>
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<!-- ============ METHOD DETAIL ========== -->
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<li class="blockList"> <h4>getAlgorithm</h4> <pre>public final <a href="../../java/lang/String.html" title="class in java.lang">String</a> getAlgorithm()</pre>
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<div class="block">
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<span>返回此<code>KeyGenerator</code>对象的算法名称。</span>
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<p> <span>这是在创建此<code>KeyGenerator</code>对象的<code>getInstance</code>调用之一中指定的<code>getInstance</code> 。</span> </p>
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</div>
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<dl>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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这个
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<code>KeyGenerator</code>对象的算法名称。
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</dd>
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</dl> </li>
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<li class="blockList"> <h4>getInstance</h4> <pre>public static final <a href="../../javax/crypto/KeyGenerator.html" title="class in javax.crypto">KeyGenerator</a> getInstance(<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm)
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throws <a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></pre>
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<div class="block">
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<span>返回一个<code>KeyGenerator</code>对象，该对象为指定的算法生成密钥。</span>
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<p> <span>此方法遍历已注册的安全提供程序列表，从最优选的提供程序开始。</span> <span>返回从支持指定算法的第一个Provider中封装KeyGeneratorSpi实现的新KeyGenerator对象。</span> </p>
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<p> <span>请注意，注册提供商的列表可以通过<a href="../../java/security/Security.html#getProviders--"><code>Security.getProviders()</code></a>方法<a href="../../java/security/Security.html#getProviders--">检索</a> 。</span> </p>
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</div>
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<dl>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<span><code>algorithm</code> - 请求密钥算法的标准名称。</span>
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<span>看到的的KeyGenerator部分<a href="../../../technotes/guides/security/StandardNames.html#KeyGenerator">Java Cryptography Architecture Standard Algorithm Name Documentation</a>有关标准算法名称的信息。</span>
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</dd>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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新的
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<code>KeyGenerator</code>对象。
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果指定的算法为空。
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</dd>
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<dd>
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<code><a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> - 如果没有提供者支持指定算法的KeyGeneratorSpi实现。
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</dd>
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<dt>
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<span class="seeLabel">另请参见：</span>
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</dt>
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<dd>
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<span><a href="../../java/security/Provider.html" title="java.security中的类"><code>Provider</code></a></span>
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</dd>
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</dl> </li>
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<li class="blockList"> <h4>getInstance</h4> <pre>public static final <a href="../../javax/crypto/KeyGenerator.html" title="class in javax.crypto">KeyGenerator</a> getInstance(<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm,
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<a href="../../java/lang/String.html" title="class in java.lang">String</a> provider)
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throws <a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a>,
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<a href="../../java/security/NoSuchProviderException.html" title="class in java.security">NoSuchProviderException</a></pre>
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<div class="block">
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<span>返回一个<code>KeyGenerator</code>对象，该对象为指定的算法生成密钥。</span>
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<p> <span>返回从指定提供程序封装KeyGeneratorSpi实现的新KeyGenerator对象。</span> <span>指定的提供者必须在安全提供程序列表中注册。</span> </p>
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<p> <span>请注意，注册提供商的列表可以通过<a href="../../java/security/Security.html#getProviders--"><code>Security.getProviders()</code></a>方法<a href="../../java/security/Security.html#getProviders--">检索</a> 。</span> </p>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<span><code>algorithm</code> - 请求密钥算法的标准名称。</span>
|
||
<span>看到的的KeyGenerator部分<a href="../../../technotes/guides/security/StandardNames.html#KeyGenerator">Java Cryptography Architecture Standard Algorithm Name Documentation</a>有关标准算法名称的信息。</span>
|
||
</dd>
|
||
<dd>
|
||
<code>provider</code> - 提供者的名称。
|
||
</dd>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
新的
|
||
<code>KeyGenerator</code>对象。
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果指定的算法为空。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> - 如果指定算法的KeyGeneratorSpi实现从指定的提供程序中不可用。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/security/NoSuchProviderException.html" title="class in java.security">NoSuchProviderException</a></code> - 如果指定的提供程序未在安全提供程序列表中注册。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果
|
||
<code>provider</code>为空或为空。
|
||
</dd>
|
||
<dt>
|
||
<span class="seeLabel">另请参见：</span>
|
||
</dt>
|
||
<dd>
|
||
<span><a href="../../java/security/Provider.html" title="java.security中的类"><code>Provider</code></a></span>
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="getInstance-java.lang.String-java.security.Provider-">
|
||
<!-- --> </a>
|
||
<ul class="blockList">
|
||
<li class="blockList"> <h4>getInstance</h4> <pre>public static final <a href="../../javax/crypto/KeyGenerator.html" title="class in javax.crypto">KeyGenerator</a> getInstance(<a href="../../java/lang/String.html" title="class in java.lang">String</a> algorithm,
|
||
<a href="../../java/security/Provider.html" title="class in java.security">Provider</a> provider)
|
||
throws <a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></pre>
|
||
<div class="block">
|
||
<span>返回一个<code>KeyGenerator</code>对象，该对象为指定的算法生成密钥。</span>
|
||
<p> <span>返回从指定的Provider对象封装KeyGeneratorSpi实现的新KeyGenerator对象。</span> <span>请注意，指定的Provider对象不必在提供者列表中注册。</span> </p>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<span><code>algorithm</code> - 所请求密钥算法的标准名称。</span>
|
||
<span>看到的的KeyGenerator部分<a href="../../../technotes/guides/security/StandardNames.html#KeyGenerator">Java Cryptography Architecture Standard Algorithm Name Documentation</a>有关标准算法名称的信息。</span>
|
||
</dd>
|
||
<dd>
|
||
<code>provider</code> - 提供商。
|
||
</dd>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
新的
|
||
<code>KeyGenerator</code>对象。
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/lang/NullPointerException.html" title="class in java.lang">NullPointerException</a></code> - 如果指定的算法为空。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/security/NoSuchAlgorithmException.html" title="class in java.security">NoSuchAlgorithmException</a></code> - 如果指定的算法的KeyGeneratorSpi实现从指定的Provider对象不可用。
|
||
</dd>
|
||
<dd>
|
||
<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果
|
||
<code>provider</code>为空。
|
||
</dd>
|
||
<dt>
|
||
<span class="seeLabel">另请参见：</span>
|
||
</dt>
|
||
<dd>
|
||
<span><a href="../../java/security/Provider.html" title="java.security中的类"><code>Provider</code></a></span>
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="getProvider--">
|
||
<!-- --> </a>
|
||
<ul class="blockList">
|
||
<li class="blockList"> <h4>getProvider</h4> <pre>public final <a href="../../java/security/Provider.html" title="class in java.security">Provider</a> getProvider()</pre>
|
||
<div class="block">
|
||
返回此
|
||
<code>KeyGenerator</code>对象的提供者。
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
这个
|
||
<code>KeyGenerator</code>对象的提供者
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="init-java.security.SecureRandom-">
|
||
<!-- --> </a>
|
||
<ul class="blockList">
|
||
<li class="blockList"> <h4>init</h4> <pre>public final void init(<a href="../../java/security/SecureRandom.html" title="class in java.security">SecureRandom</a> random)</pre>
|
||
<div class="block">
|
||
初始化此密钥生成器。
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<code>random</code> - 该发生器的随机性来源
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="init-java.security.spec.AlgorithmParameterSpec-">
|
||
<!-- --> </a>
|
||
<ul class="blockList">
|
||
<li class="blockList"> <h4>init</h4> <pre>public final void init(<a href="../../java/security/spec/AlgorithmParameterSpec.html" title="interface in java.security.spec">AlgorithmParameterSpec</a> params)
|
||
throws <a href="../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></pre>
|
||
<div class="block">
|
||
<span>使用指定的参数集初始化此密钥生成器。</span>
|
||
<p> <span>如果此密钥生成器需要随机字节，它会使用让他们<a href="../../java/security/SecureRandom.html" title="java.security中的类"><code>SecureRandom</code></a>实现的最高优先级安装的提供作为随机源。</span> <span>（如果没有一个已安装的提供商提供SecureRandom的实现，将会使用系统提供的随机源。）</span> </p>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<code>params</code> - 密钥生成参数
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></code> - 如果给定的参数不适合此密钥生成器
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="init-java.security.spec.AlgorithmParameterSpec-java.security.SecureRandom-">
|
||
<!-- --> </a>
|
||
<ul class="blockList">
|
||
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|
||
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|
||
throws <a href="../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></pre>
|
||
<div class="block">
|
||
使用指定的参数集和用户提供的随机源初始化此密钥生成器。
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<code>params</code> - 密钥生成参数
|
||
</dd>
|
||
<dd>
|
||
<code>random</code> - 这个密钥生成器的随机源
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/security/InvalidAlgorithmParameterException.html" title="class in java.security">InvalidAlgorithmParameterException</a></code> - 如果
|
||
<code>params</code>不适合此密钥生成器
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="init-int-">
|
||
<!-- --> </a>
|
||
<ul class="blockList">
|
||
<li class="blockList"> <h4>init</h4> <pre>public final void init(int keysize)</pre>
|
||
<div class="block">
|
||
<span>初始化此密钥生成器用于某些密钥大小。</span>
|
||
<p> <span>如果此密钥生成器需要随机字节，它会使用让他们<a href="../../java/security/SecureRandom.html" title="java.security中的类"><code>SecureRandom</code></a>实现的最高优先级安装的提供作为随机源。</span> <span>（如果没有一个已安装的提供商提供SecureRandom的实现，将会使用系统提供的随机源。）</span> </p>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<span><code>keysize</code> - <code>keysize</code> 。</span>
|
||
<span>这是一个以比特数表示的算法特定度量。</span>
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/security/InvalidParameterException.html" title="class in java.security">InvalidParameterException</a></code> - 如果keysize错误或不支持。
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="init-int-java.security.SecureRandom-">
|
||
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|
||
<ul class="blockList">
|
||
<li class="blockList"> <h4>init</h4> <pre>public final void init(int keysize,
|
||
<a href="../../java/security/SecureRandom.html" title="class in java.security">SecureRandom</a> random)</pre>
|
||
<div class="block">
|
||
使用用户提供的随机源，初始化该密钥生成器以进行某些密钥化。
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<span><code>keysize</code> - <code>keysize</code> 。</span>
|
||
<span>这是一个以比特数表示的算法特定度量。</span>
|
||
</dd>
|
||
<dd>
|
||
<code>random</code> - 这个密钥生成器的随机源
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/security/InvalidParameterException.html" title="class in java.security">InvalidParameterException</a></code> - 如果
|
||
<code><a href="../../java/security/InvalidParameterException.html" title="class in java.security">InvalidParameterException</a></code>错误或不支持。
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="generateKey--">
|
||
<!-- --> </a>
|
||
<ul class="blockListLast">
|
||
<li class="blockList"> <h4>generateKey</h4> <pre>public final <a href="../../javax/crypto/SecretKey.html" title="interface in javax.crypto">SecretKey</a> generateKey()</pre>
|
||
<div class="block">
|
||
生成一个秘密密钥。
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
新的钥匙
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> </li>
|
||
</ul> </li>
|
||
</ul>
|
||
</div>
|
||
</div> |