content/docs/r3.3.1/api/org/apache/hadoop/security/token/SecretManager.html - hadoop-site - Git at Google

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 <div class="subTitle">org.apache.hadoop.security.token</div>
 <h2 title="Class SecretManager" class="title">Class SecretManager&lt;T extends <a href="../../../../../org/apache/hadoop/security/token/TokenIdentifier.html" title="class in org.apache.hadoop.security.token">TokenIdentifier</a>&gt;</h2>
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 <li>org.apache.hadoop.security.token.SecretManager&lt;T&gt;</li>
 </ul>
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 <div class="description">
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 <dl>
 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>T</code> - The type of the token identifier</dd>
 </dl>
 <dl>
 <dt>Direct Known Subclasses:</dt>
 <dd><a href="../../../../../org/apache/hadoop/security/token/delegation/AbstractDelegationTokenSecretManager.html" title="class in org.apache.hadoop.security.token.delegation">AbstractDelegationTokenSecretManager</a>, <a href="../../../../../org/apache/hadoop/yarn/security/client/BaseClientToAMTokenSecretManager.html" title="class in org.apache.hadoop.yarn.security.client">BaseClientToAMTokenSecretManager</a></dd>
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 <pre>@InterfaceAudience.Public
  @InterfaceStability.Evolving
 public abstract class <span class="typeNameLabel">SecretManager&lt;T extends <a href="../../../../../org/apache/hadoop/security/token/TokenIdentifier.html" title="class in org.apache.hadoop.security.token">TokenIdentifier</a>&gt;</span>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
 <div class="block">The server-side secret manager for each token type.</div>
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 <th class="colOne" scope="col">Constructor and Description</th>
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 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#SecretManager--">SecretManager</a></span>()</code>&nbsp;</td>
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 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#checkAvailableForRead--">checkAvailableForRead</a></span>()</code>
 <div class="block">No-op if the secret manager is available for reading tokens, throw a
  StandbyException otherwise.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>abstract <a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#createIdentifier--">createIdentifier</a></span>()</code>
 <div class="block">Create an empty token identifier.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>static byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#createPassword-byte:A-javax.crypto.SecretKey-">createPassword</a></span>(byte[]&nbsp;identifier,
               <a href="https://docs.oracle.com/javase/8/docs/api/javax/crypto/SecretKey.html?is-external=true" title="class or interface in javax.crypto">SecretKey</a>&nbsp;key)</code>
 <div class="block">Compute HMAC of the identifier using the secret key and return the
  output as password</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>protected abstract byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#createPassword-T-">createPassword</a></span>(<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;identifier)</code>
 <div class="block">Create the password for the given identifier.</div>
 </td>
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 <tr id="i4" class="altColor">
 <td class="colFirst"><code>protected static <a href="https://docs.oracle.com/javase/8/docs/api/javax/crypto/SecretKey.html?is-external=true" title="class or interface in javax.crypto">SecretKey</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#createSecretKey-byte:A-">createSecretKey</a></span>(byte[]&nbsp;key)</code>
 <div class="block">Convert the byte[] to a secret key</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/javax/crypto/SecretKey.html?is-external=true" title="class or interface in javax.crypto">SecretKey</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#generateSecret--">generateSecret</a></span>()</code>
 <div class="block">Generate a new random secret key.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#retriableRetrievePassword-T-">retriableRetrievePassword</a></span>(<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;identifier)</code>
 <div class="block">The same functionality with <a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#retrievePassword-T-"><code>retrievePassword(T)</code></a>, except that this
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  to indicate that client can retry/failover the same operation because of
  temporary issue on the server side.</div>
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 <td class="colFirst"><code>abstract byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#retrievePassword-T-">retrievePassword</a></span>(<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;identifier)</code>
 <div class="block">Retrieve the password for the given token identifier.</div>
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 <pre>public&nbsp;SecretManager()</pre>
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 <pre>protected abstract&nbsp;byte[]&nbsp;createPassword(<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;identifier)</pre>
 <div class="block">Create the password for the given identifier.
  identifier may be modified inside this method.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>identifier</code> - the identifier to use</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the new password</dd>
 </dl>
 </li>
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 <pre>public abstract&nbsp;byte[]&nbsp;retrievePassword(<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;identifier)
                                  throws org.apache.hadoop.security.token.SecretManager.InvalidToken</pre>
 <div class="block">Retrieve the password for the given token identifier. Should check the date
  or registry to make sure the token hasn't expired or been revoked. Returns
  the relevant password.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>identifier</code> - the identifier to validate</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the password to use</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.hadoop.security.token.SecretManager.InvalidToken</code> - the token was invalid</dd>
 </dl>
 </li>
 </ul>
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 <pre>public&nbsp;byte[]&nbsp;retriableRetrievePassword(<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;identifier)
                                  throws org.apache.hadoop.security.token.SecretManager.InvalidToken,
                                         org.apache.hadoop.ipc.StandbyException,
                                         org.apache.hadoop.ipc.RetriableException,
                                         <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
 <div class="block">The same functionality with <a href="../../../../../org/apache/hadoop/security/token/SecretManager.html#retrievePassword-T-"><code>retrievePassword(T)</code></a>, except that this
  method can throw a <code>RetriableException</code> or a <code>StandbyException</code>
  to indicate that client can retry/failover the same operation because of
  temporary issue on the server side.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>identifier</code> - the identifier to validate</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the password to use</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.hadoop.security.token.SecretManager.InvalidToken</code> - the token was invalid</dd>
 <dd><code>org.apache.hadoop.ipc.StandbyException</code> - the server is in standby state, the client can
          try other servers</dd>
 <dd><code>org.apache.hadoop.ipc.RetriableException</code> - the token was invalid, and the server thinks
          this may be a temporary issue and suggests the client to retry</dd>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - to allow future exceptions to be added without breaking
          compatibility</dd>
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 <pre>public abstract&nbsp;<a href="../../../../../org/apache/hadoop/security/token/SecretManager.html" title="type parameter in SecretManager">T</a>&nbsp;createIdentifier()</pre>
 <div class="block">Create an empty token identifier.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the newly created empty token identifier</dd>
 </dl>
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 <pre>public&nbsp;void&nbsp;checkAvailableForRead()
                            throws org.apache.hadoop.ipc.StandbyException</pre>
 <div class="block">No-op if the secret manager is available for reading tokens, throw a
  StandbyException otherwise.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.hadoop.ipc.StandbyException</code> - if the secret manager is not available to read
          tokens</dd>
 </dl>
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 <h4>generateSecret</h4>
 <pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/javax/crypto/SecretKey.html?is-external=true" title="class or interface in javax.crypto">SecretKey</a>&nbsp;generateSecret()</pre>
 <div class="block">Generate a new random secret key.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the new key</dd>
 </dl>
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 <pre>public static&nbsp;byte[]&nbsp;createPassword(byte[]&nbsp;identifier,
                                     <a href="https://docs.oracle.com/javase/8/docs/api/javax/crypto/SecretKey.html?is-external=true" title="class or interface in javax.crypto">SecretKey</a>&nbsp;key)</pre>
 <div class="block">Compute HMAC of the identifier using the secret key and return the
  output as password</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>identifier</code> - the bytes of the identifier</dd>
 <dd><code>key</code> - the secret key</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the bytes of the generated password</dd>
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 <h4>createSecretKey</h4>
 <pre>protected static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/javax/crypto/SecretKey.html?is-external=true" title="class or interface in javax.crypto">SecretKey</a>&nbsp;createSecretKey(byte[]&nbsp;key)</pre>
 <div class="block">Convert the byte[] to a secret key</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - the byte[] to create a secret key from</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the secret key</dd>
 </dl>
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