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290 lines
12 KiB
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<div class="header">
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javax.crypto.spec
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<h2 class="title" title="Class DESedeKeySpec">Class DESedeKeySpec</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.spec.DESedeKeySpec</li>
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</ul> </li>
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<div class="description">
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<dl>
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<dt>
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All Implemented Interfaces:
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</dt>
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<dd>
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<span><a href="../../../java/security/spec/KeySpec.html" title="java.security.spec中的接口">KeySpec</a></span>
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</dd>
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</dl>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">DESedeKeySpec</span>
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extends <a href="../../../java/lang/Object.html" title="class in java.lang">Object</a>
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implements <a href="../../../java/security/spec/KeySpec.html" title="interface in java.security.spec">KeySpec</a></pre>
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<div class="block">
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该类指定DES-EDE（“triple-DES”）键。
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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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</dl> </li>
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<div class="summary">
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<!-- =========== FIELD SUMMARY =========== -->
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<li class="blockList"><a name="field.summary">
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<!-- --> </a> <h3>Field Summary</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Field Summary table, listing fields, and an explanation">
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<caption>
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<span>Fields</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 and Type</th>
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<th class="colLast" scope="col">Field and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colFirst"><code>static int</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/crypto/spec/DESedeKeySpec.html#DES_EDE_KEY_LEN">DES_EDE_KEY_LEN</a></span></code>
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<div class="block">
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定义DESede密钥长度的常数（以字节为单位）。
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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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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<ul class="blockList">
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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="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/crypto/spec/DESedeKeySpec.html#DESedeKeySpec-byte:A-">DESedeKeySpec</a></span>(byte[] key)</code>
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<div class="block">
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创建使用前24个字节在一个DESedeKeySpec对象，
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<code>key</code>作为DES-EDE密钥的密钥材料。
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</div> </td>
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</tr>
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<tr class="rowColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../javax/crypto/spec/DESedeKeySpec.html#DESedeKeySpec-byte:A-int-">DESedeKeySpec</a></span>(byte[] key, int offset)</code>
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<div class="block">
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创建使用前24个字节在一个DESedeKeySpec对象，
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<code>key</code> ，在开始
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<code>offset</code>以下，作为DES-EDE密钥的密钥材料。
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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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<ul class="blockList">
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<li class="blockList"><a name="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>byte[]</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/crypto/spec/DESedeKeySpec.html#getKey--">getKey</a></span>()</code>
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<div class="block">
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返回DES-EDE键。
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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>static boolean</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../javax/crypto/spec/DESedeKeySpec.html#isParityAdjusted-byte:A-int-">isParityAdjusted</a></span>(byte[] key, int offset)</code>
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<div class="block">
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检查给定的DES-EDE密钥是否从
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<code>offset</code>开始进行奇偶校验。
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</div> </td>
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</tr>
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</tbody>
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</table>
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<ul class="blockList">
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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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</ul> </li>
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</ul> </li>
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</ul>
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</div>
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<div class="details">
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<!-- ============ FIELD DETAIL =========== -->
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<li class="blockList"><a name="field.detail">
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<!-- --> </a> <h3>字段详细信息</h3> <a name="DES_EDE_KEY_LEN">
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<ul class="blockListLast">
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<li class="blockList"> <h4>DES_EDE_KEY_LEN</h4> <pre>public static final int DES_EDE_KEY_LEN</pre>
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<div class="block">
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定义DESede密钥长度的常数（以字节为单位）。
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</div>
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<dl>
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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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<a href="../../../constant-values.html#javax.crypto.spec.DESedeKeySpec.DES_EDE_KEY_LEN">Constant Field Values</a>
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</dd>
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</dl> </li>
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</ul> </li>
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</ul>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<ul class="blockList">
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<li class="blockList"><a name="constructor.detail">
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<!-- --> </a> <h3>构造方法详细信息</h3> <a name="DESedeKeySpec-byte:A-">
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<ul class="blockList">
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<li class="blockList"> <h4>DESedeKeySpec</h4> <pre>public DESedeKeySpec(byte[] key)
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throws <a href="../../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></pre>
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<div class="block">
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<span>创建使用前24个字节在一个DESedeKeySpec对象， <code>key</code>作为DES-EDE密钥的密钥材料。</span>
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<p> <span>构成DES-EDE键的字节是<code>key[0]</code>和<code>key[23]</code>之间的字节</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>key</code> - 具有DES-EDE密钥资料的缓冲区。</span>
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<span>缓冲区的前24个字节被复制以防止后续修改。</span>
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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
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<code>key</code>为空。
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</dd>
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<dd>
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<code><a href="../../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></code> - 如果给定的密钥材料短于24个字节。
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</dd>
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</dl> </li>
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</ul> <a name="DESedeKeySpec-byte:A-int-">
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<!-- --> </a>
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<ul class="blockListLast">
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<li class="blockList"> <h4>DESedeKeySpec</h4> <pre>public DESedeKeySpec(byte[] key,
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int offset)
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throws <a href="../../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></pre>
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<div class="block">
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<span>创建使用前24个字节在一个DESedeKeySpec对象， <code>key</code> ，在开始<code>offset</code>以下，作为DES-EDE密钥的密钥材料。</span>
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<p> <span>组成DES-EDE密钥的字节在之间<code>key[offset]</code>和<code>key[offset+23]</code>以下。</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>key</code> - 具有DES-EDE密钥资料的缓冲区。</span>
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<span>从offset（ <code>offset</code>开始的缓冲区的前24个字节被复制以防止后续修改。</span>
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</dd>
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<dd>
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<code>offset</code> - 偏移在
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<code>key</code> ，其中DES-EDE密钥材料启动。
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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
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<code>key</code>为null。
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</dd>
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<dd>
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<code><a href="../../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></code> - 如果给定的密钥材料（从
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<code>offset</code>开始）短于24字节
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</dd>
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</dl> </li>
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</ul> </li>
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</ul>
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<!-- ============ METHOD DETAIL ========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method.detail">
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<!-- --> </a> <h3>方法详细信息</h3> <a name="getKey--">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getKey</h4> <pre>public byte[] getKey()</pre>
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<div class="block">
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返回DES-EDE键。
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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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<span>DES-EDE键。</span>
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<span>每次调用此方法时都会返回一个新数组。</span>
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</dd>
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</dl> </li>
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</ul> <a name="isParityAdjusted-byte:A-int-">
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<ul class="blockListLast">
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<li class="blockList"> <h4>isParityAdjusted</h4> <pre>public static boolean isParityAdjusted(byte[] key,
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int offset)
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throws <a href="../../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></pre>
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<div class="block">
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检查给定的DES-EDE密钥是否从
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<code>offset</code>开始进行奇偶校验。
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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>key</code> - 保存键值的字节数组
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</dd>
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<dd>
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<code>offset</code> - 字节数组的偏移量
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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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如果给定的DES-EDE密钥是奇偶校验调整的，则为真，否则为false
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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
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<code>key</code>为空。
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</dd>
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<dd>
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<code><a href="../../../java/security/InvalidKeyException.html" title="class in java.security">InvalidKeyException</a></code> - 如果给定的密钥材料（从
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<code>offset</code>开始包含）短于24字节
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</dd>
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</dl> </li>
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</ul> </li>
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</ul> </li>
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</ul>
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</div>
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