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 <h2 title="Class JcaCipherService" class="title">Class JcaCipherService</h2>
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 <li>org.apache.shiro.crypto.JcaCipherService</li>
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 <dl>
 <dt>All Implemented Interfaces:</dt>
 <dd><a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto">CipherService</a></dd>
 </dl>
 <dl>
 <dt>Direct Known Subclasses:</dt>
 <dd><a href="../../../../org/apache/shiro/crypto/AbstractSymmetricCipherService.html" title="class in org.apache.shiro.crypto">AbstractSymmetricCipherService</a></dd>
 </dl>
 <hr>
 <br>
 <pre>public abstract class <a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.69">JcaCipherService</a>
 extends <a href="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
 implements <a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto">CipherService</a></pre>
 <div class="block">Abstract <code>CipherService</code> implementation utilizing Java's JCA APIs.
  <h2>Auto-generated Initialization Vectors</h2>
  Shiro does something by default for all of its <code>CipherService</code> implementations that the JCA
  <a href="http://java.sun.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> does not do:  by default,
  <a href="http://en.wikipedia.org/wiki/Initialization_vector">initialization vector</a>s are automatically randomly
  generated and prepended to encrypted data before returning from the <code>encrypt</code> methods.  That is, the returned
  byte array or <code>OutputStream</code> is actually a concatenation of an initialization vector byte array plus the actual
  encrypted data byte array.  The <code>decrypt</code> methods in turn know to read this prepended initialization vector
  before decrypting the real data that follows.
  <p/>
  This is highly desirable because initialization vectors guarantee that, for a key and any plaintext, the encrypted
  output will always be different <em>even if you call <code>encrypt</code> multiple times with the exact same arguments</em>.
  This is essential in cryptography to ensure that data patterns cannot be identified across multiple input sources
  that are the same or similar.
  <p/>
  You can turn off this behavior by setting the
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setGenerateInitializationVectors(boolean)"><code>generateInitializationVectors</code></a> property to <code>false</code>, but it
  is highly recommended that you do not do this unless you have a very good reason to do so, since you would be losing
  a critical security feature.
  <h3>Initialization Vector Size</h3>
  This implementation defaults the <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setInitializationVectorSize(int)"><code>initializationVectorSize</code></a> attribute to
  <code>128</code> bits, a fairly common size.  Initialization vector sizes are very algorithm specific however, so subclass
  implementations will often override this value in their constructor if necessary.
  <p/>
  Also note that <code>initializationVectorSize</code> values are specified in the number of
  bits (not bytes!) to match common references in most cryptography documentation.  In practice though, initialization
  vectors are always specified as a byte array, so ensure that if you set this property, that the value is a multiple
  of <code>8</code> to ensure that the IV can be correctly represented as a byte array (the
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setInitializationVectorSize(int)"><code>setInitializationVectorSize</code></a> mutator method enforces this).</div>
 <dl><dt><span class="strong">Since:</span></dt>
   <dd>1.0</dd></dl>
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 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier</th>
 <th class="colLast" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected </code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#JcaCipherService(java.lang.String)">JcaCipherService</a></strong>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;algorithmName)</code>
 <div class="block">Creates a new <code>JcaCipherService</code> instance which will use the specified cipher <code>algorithmName</code>
  for all encryption, decryption, and key operations.</div>
 </td>
 </tr>
 </table>
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 <h3>Method Summary</h3>
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 <caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt(byte[], byte[])">decrypt</a></strong>(byte[]&nbsp;ciphertext,
               byte[]&nbsp;key)</code>
 <div class="block">Decrypts encrypted data via the specified cipher key and returns the original (pre-encrypted) data.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])">decrypt</a></strong>(<a href="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;in,
               <a href="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
               byte[]&nbsp;key)</code>
 <div class="block">Receives encrypted data from the given <code>InputStream</code>, decrypts it, and sends the resulting decrypted data
  to the given <code>OutputStream</code>.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt(byte[], byte[])">encrypt</a></strong>(byte[]&nbsp;plaintext,
               byte[]&nbsp;key)</code>
 <div class="block">Encrypts data via the specified cipher key.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])">encrypt</a></strong>(<a href="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;in,
               <a href="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
               byte[]&nbsp;key)</code>
 <div class="block">Receives the data from the given <code>InputStream</code>, encrypts it, and sends the resulting encrypted data to the
  given <code>OutputStream</code>.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#ensureSecureRandom()">ensureSecureRandom</a></strong>()</code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected byte[]</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#generateInitializationVector(boolean)">generateInitializationVector</a></strong>(boolean&nbsp;streaming)</code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName()">getAlgorithmName</a></strong>()</code>
 <div class="block">Returns the cipher algorithm name that will be used for all encryption, decryption, and key operations (for
  example, 'AES', 'Blowfish', 'RSA', 'DSA', 'TripleDES', etc).</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected static <a href="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getDefaultSecureRandom()">getDefaultSecureRandom</a></strong>()</code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getInitializationVectorSize()">getInitializationVectorSize</a></strong>()</code>
 <div class="block">Returns the algorithm-specific size in bits of generated initialization vectors.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getKeySize()">getKeySize</a></strong>()</code>
 <div class="block">Returns the size in bits (not bytes) of generated cipher keys.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code><a href="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getSecureRandom()">getSecureRandom</a></strong>()</code>
 <div class="block">Returns a source of randomness for encryption operations.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getStreamingBufferSize()">getStreamingBufferSize</a></strong>()</code>
 <div class="block">Returns the size in bytes of the internal buffer used to transfer data from one stream to another during stream
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>encrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a> and
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getTransformationString(boolean)">getTransformationString</a></strong>(boolean&nbsp;streaming)</code>
 <div class="block">Returns the transformation string to use with the <a href="http://java.sun.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true#getInstance(java.lang.String)" title="class or interface in javax.crypto"><code>Cipher.getInstance(java.lang.String)</code></a> invocation when
  creating a new <code>Cipher</code> instance.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#isGenerateInitializationVectors()">isGenerateInitializationVectors</a></strong>()</code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#isGenerateInitializationVectors(boolean)">isGenerateInitializationVectors</a></strong>(boolean&nbsp;streaming)</code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setGenerateInitializationVectors(boolean)">setGenerateInitializationVectors</a></strong>(boolean&nbsp;generateInitializationVectors)</code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setInitializationVectorSize(int)">setInitializationVectorSize</a></strong>(int&nbsp;initializationVectorSize)</code>
 <div class="block">Sets the algorithm-specific initialization vector size in bits (not bytes!) to be used when generating
  initialization vectors.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setKeySize(int)">setKeySize</a></strong>(int&nbsp;keySize)</code>
 <div class="block">Sets the size in bits (not bytes) of generated cipher keys.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setSecureRandom(java.security.SecureRandom)">setSecureRandom</a></strong>(<a href="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a>&nbsp;secureRandom)</code>
 <div class="block">Sets a source of randomness for encryption operations.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><strong><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setStreamingBufferSize(int)">setStreamingBufferSize</a></strong>(int&nbsp;streamingBufferSize)</code>
 <div class="block">Sets the size in bytes of the internal buffer used to transfer data from one stream to another during stream
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>encrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a> and
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).</div>
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 <h4>JcaCipherService</h4>
 <pre>protected&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.125">JcaCipherService</a>(<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;algorithmName)</pre>
 <div class="block">Creates a new <code>JcaCipherService</code> instance which will use the specified cipher <code>algorithmName</code>
  for all encryption, decryption, and key operations.  Also, the following defaults are set:
  <ul>
  <li><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setKeySize(int)"><code>keySize</code></a> = 128 bits</li>
  <li><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setInitializationVectorSize(int)"><code>initializationVectorSize</code></a> = 128 bits</li>
  <li><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setStreamingBufferSize(int)"><code>streamingBufferSize</code></a> = 512 bytes</li>
  </ul></div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>algorithmName</code> - the name of the cipher algorithm to use for all encryption, decryption, and key operations</dd></dl>
 </li>
 </ul>
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 <h3>Method Detail</h3>
 <a name="getAlgorithmName()">
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 <h4>getAlgorithmName</h4>
 <pre>public&nbsp;<a href="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.142">getAlgorithmName</a>()</pre>
 <div class="block">Returns the cipher algorithm name that will be used for all encryption, decryption, and key operations (for
  example, 'AES', 'Blowfish', 'RSA', 'DSA', 'TripleDES', etc).</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the cipher algorithm name that will be used for all encryption, decryption, and key operations</dd></dl>
 </li>
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 <a name="getKeySize()">
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 <h4>getKeySize</h4>
 <pre>public&nbsp;int&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.151">getKeySize</a>()</pre>
 <div class="block">Returns the size in bits (not bytes) of generated cipher keys.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the size in bits (not bytes) of generated cipher keys.</dd></dl>
 </li>
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 <h4>setKeySize</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.160">setKeySize</a>(int&nbsp;keySize)</pre>
 <div class="block">Sets the size in bits (not bytes) of generated cipher keys.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>keySize</code> - the size in bits (not bytes) of generated cipher keys.</dd></dl>
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 <div class="block">Returns the algorithm-specific size in bits of generated initialization vectors.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the algorithm-specific size in bits of generated initialization vectors.</dd></dl>
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                                  throws <a href="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></pre>
 <div class="block">Sets the algorithm-specific initialization vector size in bits (not bytes!) to be used when generating
  initialization vectors.  The  value must be a multiple of <code>8</code> to ensure that the IV can be represented
  as a byte array.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>initializationVectorSize</code> - the size in bits (not bytes) of generated initialization vectors.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="http://java.sun.com/javase/6/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if the size is not a multiple of <code>8</code>.</dd></dl>
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 <div class="block">Returns the size in bytes of the internal buffer used to transfer data from one stream to another during stream
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>encrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a> and
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).
  <p/>
  Default size is <code>512</code> bytes.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>the size of the internal buffer used to transfer data from one stream to another during stream
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 <div class="block">Sets the size in bytes of the internal buffer used to transfer data from one stream to another during stream
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>encrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a> and
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])"><code>decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).
  <p/>
  Default size is <code>512</code> bytes.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>streamingBufferSize</code> - the size of the internal buffer used to transfer data from one stream to another
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 <pre>public&nbsp;<a href="http://java.sun.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security">SecureRandom</a>&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.237">getSecureRandom</a>()</pre>
 <div class="block">Returns a source of randomness for encryption operations.  If one is not configured, and the underlying
  algorithm needs one, the JDK <code>SHA1PRNG</code> instance will be used by default.</div>
 <dl><dt><span class="strong">Returns:</span></dt><dd>a source of randomness for encryption operations.  If one is not configured, and the underlying
          algorithm needs one, the JDK <code>SHA1PRNG</code> instance will be used by default.</dd></dl>
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 <div class="block">Sets a source of randomness for encryption operations.  If one is not configured, and the underlying
  algorithm needs one, the JDK <code>SHA1PRNG</code> instance will be used by default.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>secureRandom</code> - a source of randomness for encryption operations.  If one is not configured, and the
                      underlying algorithm needs one, the JDK <code>SHA1PRNG</code> instance will be used by default.</dd></dl>
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 <div class="block">Returns the transformation string to use with the <a href="http://java.sun.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true#getInstance(java.lang.String)" title="class or interface in javax.crypto"><code>Cipher.getInstance(java.lang.String)</code></a> invocation when
  creating a new <code>Cipher</code> instance.  This default implementation always returns
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName()"><code>getAlgorithmName()</code></a>.  Block cipher implementations will want to override this method
  to support appending cipher operation modes and padding schemes.</div>
 <dl><dt><span class="strong">Parameters:</span></dt><dd><code>streaming</code> - if the transformation string is going to be used for a Cipher for stream-based encryption or not.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>the transformation string to use with the <a href="http://java.sun.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true#getInstance(java.lang.String)" title="class or interface in javax.crypto"><code>Cipher.getInstance(java.lang.String)</code></a> invocation when
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                  byte[]&nbsp;key)</pre>
 <div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html#encrypt(byte[], byte[])">CipherService</a></code></strong></div>
 <div class="block">Encrypts data via the specified cipher key.  Note that the key must be in a format understood by
  the <code>CipherService</code> implementation.</div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CipherService.html#encrypt(byte[], byte[])">encrypt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto">CipherService</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>plaintext</code> - the data to encrypt</dd><dd><code>key</code> - the cipher key used during encryption.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>a byte source with the encrypted representation of the specified raw data.</dd></dl>
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 <pre>public&nbsp;<a href="../../../../org/apache/shiro/util/ByteSource.html" title="interface in org.apache.shiro.util">ByteSource</a>&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.347">decrypt</a>(byte[]&nbsp;ciphertext,
                  byte[]&nbsp;key)
                    throws <a href="../../../../org/apache/shiro/crypto/CryptoException.html" title="class in org.apache.shiro.crypto">CryptoException</a></pre>
 <div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html#decrypt(byte[], byte[])">CipherService</a></code></strong></div>
 <div class="block">Decrypts encrypted data via the specified cipher key and returns the original (pre-encrypted) data.
  Note that the key must be in a format understood by the CipherService implementation.</div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CipherService.html#decrypt(byte[], byte[])">decrypt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto">CipherService</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>ciphertext</code> - the previously encrypted data to decrypt</dd><dd><code>key</code> - the cipher key used during decryption.</dd>
 <dt><span class="strong">Returns:</span></dt><dd>a byte source representing the original form of the specified encrypted data.</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CryptoException.html" title="class in org.apache.shiro.crypto">CryptoException</a></code> - if there is an error during decryption</dd></dl>
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 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.500">encrypt</a>(<a href="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;in,
            <a href="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
            byte[]&nbsp;key)
              throws <a href="../../../../org/apache/shiro/crypto/CryptoException.html" title="class in org.apache.shiro.crypto">CryptoException</a></pre>
 <div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])">CipherService</a></code></strong></div>
 <div class="block">Receives the data from the given <code>InputStream</code>, encrypts it, and sends the resulting encrypted data to the
  given <code>OutputStream</code>.
  <p/>
  <b>NOTE:</b> This method <em>does NOT</em> flush or close either stream prior to returning - the caller must
  do so when they are finished with the streams.  For example:
  <pre>
  try {
      InputStream in = ...
      OutputStream out = ...
      cipherService.encrypt(in, out, encryptionKey);
  } finally {
      if (in != null) {
          try {
              in.close();
          } catch (IOException ioe1) { ... log, trigger event, etc }
      }
      if (out != null) {
          try {
              out.close();
          } catch (IOException ioe2) { ... log, trigger event, etc }
      }
  }
  </pre></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CipherService.html#encrypt(java.io.InputStream, java.io.OutputStream, byte[])">encrypt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto">CipherService</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>in</code> - the stream supplying the data to encrypt</dd><dd><code>out</code> - the stream to send the encrypted data</dd><dd><code>key</code> - the cipher key to use for encryption</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CryptoException.html" title="class in org.apache.shiro.crypto">CryptoException</a></code> - if there is any problem during encryption.</dd></dl>
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 <h4>decrypt</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/JcaCipherService.html#line.526">decrypt</a>(<a href="http://java.sun.com/javase/6/docs/api/java/io/InputStream.html?is-external=true" title="class or interface in java.io">InputStream</a>&nbsp;in,
            <a href="http://java.sun.com/javase/6/docs/api/java/io/OutputStream.html?is-external=true" title="class or interface in java.io">OutputStream</a>&nbsp;out,
            byte[]&nbsp;key)
              throws <a href="../../../../org/apache/shiro/crypto/CryptoException.html" title="class in org.apache.shiro.crypto">CryptoException</a></pre>
 <div class="block"><strong>Description copied from interface:&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])">CipherService</a></code></strong></div>
 <div class="block">Receives encrypted data from the given <code>InputStream</code>, decrypts it, and sends the resulting decrypted data
  to the given <code>OutputStream</code>.
  <p/>
  <b>NOTE:</b> This method <em>does NOT</em> flush or close either stream prior to returning - the caller must
  do so when they are finished with the streams.  For example:
  <pre>
  try {
      InputStream in = ...
      OutputStream out = ...
      cipherService.decrypt(in, out, decryptionKey);
  } finally {
      if (in != null) {
          try {
              in.close();
          } catch (IOException ioe1) { ... log, trigger event, etc }
      }
      if (out != null) {
          try {
              out.close();
          } catch (IOException ioe2) { ... log, trigger event, etc }
      }
  }
  </pre></div>
 <dl>
 <dt><strong>Specified by:</strong></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CipherService.html#decrypt(java.io.InputStream, java.io.OutputStream, byte[])">decrypt</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto">CipherService</a></code></dd>
 <dt><span class="strong">Parameters:</span></dt><dd><code>in</code> - the stream supplying the data to decrypt</dd><dd><code>out</code> - the stream to send the decrypted data</dd><dd><code>key</code> - the cipher key to use for decryption</dd>
 <dt><span class="strong">Throws:</span></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/CryptoException.html" title="class in org.apache.shiro.crypto">CryptoException</a></code> - if there is any problem during decryption.</dd></dl>
 </li>
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