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<h2 title="Class AesCipherService" class="title">Class AesCipherService</h2>
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<li><a href="JcaCipherService.html" title="class in org.apache.shiro.crypto">org.apache.shiro.crypto.JcaCipherService</a></li>
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<pre>public class <a href="../../../../src-html/org/apache/shiro/crypto/AesCipherService.html#line.43">AesCipherService</a>
extends <a href="DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto">DefaultBlockCipherService</a></pre>
<div class="block"><code>CipherService</code> using the <code>AES</code> cipher algorithm for all encryption, decryption, and key operations.
<p/>
The AES algorithm can support key sizes of <code>128</code>, <code>192</code> and <code>256</code> bits<b>*</b>. This implementation
defaults to 128 bits.
<p/>
Note that this class retains changes the parent class's default <a href="OperationMode.html#CBC"><code>CBC</code></a> mode to <a href="OperationMode.html#GCM"><code>GCM</code></a> of operation
instead of the typical JDK default of <a href="OperationMode.html#ECB"><code>ECB</code></a>. <code>ECB</code> should not be used in
security-sensitive environments because <code>ECB</code> does not allow for initialization vectors, which are
considered necessary for strong encryption. See the <a href="DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto"><code>parent class</code></a>'s JavaDoc and the
<a href="JcaCipherService.html" title="class in org.apache.shiro.crypto"><code>JcaCipherService</code></a> JavaDoc for more on why the JDK default should not be used and is not
used in this implementation.
<p/>
<b>*</b> Generating and using AES key sizes greater than 128 require installation of the
<a href="http://java.sun.com/javase/downloads/index.jsp">Java Cryptography Extension (JCE) Unlimited Strength
Jurisdiction Policy files</a>.</div>
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<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.0</dd>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">AesCipherService</a></span>()</code></th>
<td class="colLast">
<div class="block">Creates a new <a href="CipherService.html" title="interface in org.apache.shiro.crypto"><code>CipherService</code></a> instance using the <code>AES</code> cipher algorithm with the following
important cipher default attributes:
Attribute
Value
<a href="JcaCipherService.html#setKeySize(int)"><code>keySize</code></a>
<code>128</code> bits
<a href="DefaultBlockCipherService.html#setBlockSize(int)"><code>blockSize</code></a>
<code>128</code> bits (required for <code>AES</code>
<a href="DefaultBlockCipherService.html#setMode(org.apache.shiro.crypto.OperationMode)"><code>mode</code></a>
<a href="OperationMode.html#GCM"><code>GCM</code></a><b>*</b>
<a href="DefaultBlockCipherService.html#setPaddingScheme(org.apache.shiro.crypto.PaddingScheme)"><code>paddingScheme</code></a>
<a href="PaddingScheme.html#NONE"><code>NoPadding</code></a>***
<a href="JcaCipherService.html#setInitializationVectorSize(int)"><code>initializationVectorSize</code></a>
<code>128</code> bits
<a href="JcaCipherService.html#setGenerateInitializationVectors(boolean)"><code>generateInitializationVectors</code></a>
<code>true</code><b>**</b>
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<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/security/spec/AlgorithmParameterSpec.html?is-external=true" title="class or interface in java.security.spec" class="externalLink">AlgorithmParameterSpec</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createParameterSpec(byte%5B%5D,boolean)">createParameterSpec</a></span>&#8203;(byte[]&nbsp;iv,
boolean&nbsp;streaming)</code></th>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.crypto.<a href="DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto">DefaultBlockCipherService</a></h3>
<code><a href="DefaultBlockCipherService.html#generateInitializationVector(boolean)">generateInitializationVector</a>, <a href="DefaultBlockCipherService.html#getBlockSize()">getBlockSize</a>, <a href="DefaultBlockCipherService.html#getModeName()">getModeName</a>, <a href="DefaultBlockCipherService.html#getPaddingSchemeName()">getPaddingSchemeName</a>, <a href="DefaultBlockCipherService.html#getStreamingBlockSize()">getStreamingBlockSize</a>, <a href="DefaultBlockCipherService.html#getStreamingModeName()">getStreamingModeName</a>, <a href="DefaultBlockCipherService.html#getStreamingPaddingSchemeName()">getStreamingPaddingSchemeName</a>, <a href="DefaultBlockCipherService.html#getTransformationString(boolean)">getTransformationString</a>, <a href="DefaultBlockCipherService.html#isGenerateInitializationVectors(boolean)">isGenerateInitializationVectors</a>, <a href="DefaultBlockCipherService.html#setBlockSize(int)">setBlockSize</a>, <a href="DefaultBlockCipherService.html#setMode(org.apache.shiro.crypto.OperationMode)">setMode</a>, <a href="DefaultBlockCipherService.html#setModeName(java.lang.String)">setModeName</a>, <a href="DefaultBlockCipherService.html#setPaddingScheme(org.apache.shiro.crypto.PaddingScheme)">setPaddingScheme</a>, <a href="DefaultBlockCipherService.html#setPaddingSchemeName(java.lang.String)">setPaddingSchemeName</a>, <a href="DefaultBlockCipherService.html#setStreamingBlockSize(int)">setStreamingBlockSize</a>, <a href="DefaultBlockCipherService.html#setStreamingMode(org.apache.shiro.crypto.OperationMode)">setStreamingMode</a>, <a href="DefaultBlockCipherService.html#setStreamingModeName(java.lang.String)">setStreamingModeName</a>, <a href="DefaultBlockCipherService.html#setStreamingPaddingScheme(org.apache.shiro.crypto.PaddingScheme)">setStreamingPaddingScheme</a>, <a href="DefaultBlockCipherService.html#setStreamingPaddingSchemeName(java.lang.String)">setStreamingPaddingSchemeName</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.crypto.<a href="AbstractSymmetricCipherService.html" title="class in org.apache.shiro.crypto">AbstractSymmetricCipherService</a></h3>
<code><a href="AbstractSymmetricCipherService.html#generateNewKey()">generateNewKey</a>, <a href="AbstractSymmetricCipherService.html#generateNewKey(int)">generateNewKey</a></code></li>
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<code><a href="JcaCipherService.html#decrypt(byte%5B%5D,byte%5B%5D)">decrypt</a>, <a href="JcaCipherService.html#decrypt(java.io.InputStream,java.io.OutputStream,byte%5B%5D)">decrypt</a>, <a href="JcaCipherService.html#encrypt(byte%5B%5D,byte%5B%5D)">encrypt</a>, <a href="JcaCipherService.html#encrypt(java.io.InputStream,java.io.OutputStream,byte%5B%5D)">encrypt</a>, <a href="JcaCipherService.html#ensureSecureRandom()">ensureSecureRandom</a>, <a href="JcaCipherService.html#getAlgorithmName()">getAlgorithmName</a>, <a href="JcaCipherService.html#getDefaultSecureRandom()">getDefaultSecureRandom</a>, <a href="JcaCipherService.html#getInitializationVectorSize()">getInitializationVectorSize</a>, <a href="JcaCipherService.html#getKeySize()">getKeySize</a>, <a href="JcaCipherService.html#getSecureRandom()">getSecureRandom</a>, <a href="JcaCipherService.html#getStreamingBufferSize()">getStreamingBufferSize</a>, <a href="JcaCipherService.html#isGenerateInitializationVectors()">isGenerateInitializationVectors</a>, <a href="JcaCipherService.html#setGenerateInitializationVectors(boolean)">setGenerateInitializationVectors</a>, <a href="JcaCipherService.html#setInitializationVectorSize(int)">setInitializationVectorSize</a>, <a href="JcaCipherService.html#setKeySize(int)">setKeySize</a>, <a href="JcaCipherService.html#setSecureRandom(java.security.SecureRandom)">setSecureRandom</a>, <a href="JcaCipherService.html#setStreamingBufferSize(int)">setStreamingBufferSize</a></code></li>
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<h4>AesCipherService</h4>
<pre>public&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/AesCipherService.html#line.96">AesCipherService</a>()</pre>
<div class="block">Creates a new <a href="CipherService.html" title="interface in org.apache.shiro.crypto"><code>CipherService</code></a> instance using the <code>AES</code> cipher algorithm with the following
important cipher default attributes:
<table>
<tr>
<th>Attribute</th>
<th>Value</th>
</tr>
<tr>
<td><a href="JcaCipherService.html#setKeySize(int)"><code>keySize</code></a></td>
<td><code>128</code> bits</td>
</tr>
<tr>
<td><a href="DefaultBlockCipherService.html#setBlockSize(int)"><code>blockSize</code></a></td>
<td><code>128</code> bits (required for <code>AES</code></td>
</tr>
<tr>
<td><a href="DefaultBlockCipherService.html#setMode(org.apache.shiro.crypto.OperationMode)"><code>mode</code></a></td>
<td><a href="OperationMode.html#GCM"><code>GCM</code></a><b>*</b></td>
</tr>
<tr>
<td><a href="DefaultBlockCipherService.html#setPaddingScheme(org.apache.shiro.crypto.PaddingScheme)"><code>paddingScheme</code></a></td>
<td><a href="PaddingScheme.html#NONE"><code>NoPadding</code></a>***</td>
</tr>
<tr>
<td><a href="JcaCipherService.html#setInitializationVectorSize(int)"><code>initializationVectorSize</code></a></td>
<td><code>128</code> bits</td>
</tr>
<tr>
<td><a href="JcaCipherService.html#setGenerateInitializationVectors(boolean)"><code>generateInitializationVectors</code></a></td>
<td><code>true</code><b>**</b></td>
</tr>
</table>
<p/>
<b>*</b> The <a href="OperationMode.html#GCM"><code>GCM</code></a> operation mode is used instead of the JDK default <code>ECB</code> to
ensure strong encryption. <code>ECB</code> should not be used in security-sensitive environments - see the
<a href="DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto"><code>DefaultBlockCipherService</code></a> class JavaDoc's &quot;Operation Mode&quot; section
for more.
<p/>
<b>**</b>In conjunction with the default <code>GCM</code> operation mode, initialization vectors are generated by
default to ensure strong encryption. See the <a href="JcaCipherService.html" title="class in org.apache.shiro.crypto"><code>JcaCipherService</code></a> class JavaDoc for more.
<p/>
<b>**</b>Since <code>GCM</code> is a stream cipher, padding is implemented in the operation mode and an external padding scheme
cannot be used in conjunction with <code>GCM</code>. In fact, <code>AES/GCM/PKCS5Padding</code> is just an alias in most JVM for
<code>AES/GCM/NoPadding</code>.
<p/>
<b>NOTE:</b> As of Java 14, setting a streaming padding for the above example will throw a NoSuchAlgorithmException</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="https://www.oracle.com/java/technologies/javase/14-relnote-issues.html#JDK-8180392">JDK-8180392</a></dd>
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<h4>createParameterSpec</h4>
<pre class="methodSignature">protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/security/spec/AlgorithmParameterSpec.html?is-external=true" title="class or interface in java.security.spec" class="externalLink">AlgorithmParameterSpec</a>&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/AesCipherService.html#line.104">createParameterSpec</a>&#8203;(byte[]&nbsp;iv,
boolean&nbsp;streaming)</pre>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="JcaCipherService.html#createParameterSpec(byte%5B%5D,boolean)">createParameterSpec</a></code>&nbsp;in class&nbsp;<code><a href="JcaCipherService.html" title="class in org.apache.shiro.crypto">JcaCipherService</a></code></dd>
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