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 <div class="subTitle">org.apache.shiro.crypto</div>
 <h2 title="Class DefaultBlockCipherService" class="title">Class DefaultBlockCipherService</h2>
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 <li><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html" title="class in org.apache.shiro.crypto">org.apache.shiro.crypto.JcaCipherService</a></li>
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 <li><a href="../../../../org/apache/shiro/crypto/AbstractSymmetricCipherService.html" title="class in org.apache.shiro.crypto">org.apache.shiro.crypto.AbstractSymmetricCipherService</a></li>
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 <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/AesCipherService.html" title="class in org.apache.shiro.crypto">AesCipherService</a>, <a href="../../../../org/apache/shiro/crypto/BlowfishCipherService.html" title="class in org.apache.shiro.crypto">BlowfishCipherService</a></dd>
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 <pre>public class <a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.133">DefaultBlockCipherService</a>
 extends <a href="../../../../org/apache/shiro/crypto/AbstractSymmetricCipherService.html" title="class in org.apache.shiro.crypto">AbstractSymmetricCipherService</a></pre>
 <div class="block">Base abstract class for block cipher algorithms.

  <h2>Usage</h2>
  Note that this class exists mostly to simplify algorithm-specific subclasses.  Unless you understand the concepts of
  cipher modes of operation, block sizes, and padding schemes, and you want direct control of these things, you should
  typically not uses instances of this class directly.  Instead, algorithm-specific subclasses, such as
  <a href="../../../../org/apache/shiro/crypto/AesCipherService.html" title="class in org.apache.shiro.crypto"><code>AesCipherService</code></a>, <a href="../../../../org/apache/shiro/crypto/BlowfishCipherService.html" title="class in org.apache.shiro.crypto"><code>BlowfishCipherService</code></a>, and others are usually better suited for regular use.
  <p/>
  However, if you have the need to create a custom block cipher service where no sufficient algorithm-specific subclass
  exists in Shiro, this class would be very useful.

  <h2>Configuration</h2>
  Block ciphers can accept configuration parameters that direct how they operate.  These parameters concatenated
  together in a single String comprise what the JDK JCA documentation calls a
  <a href="http://java.sun.com/javase/6/docs/technotes/guides/security/crypto/CryptoSpec.html#trans">transformation
  string</a>.  We think that it is better for Shiro to construct this transformation string automatically based on its
  constituent parts instead of having the end-user construct the string manually, which may be error prone or
  confusing.  To that end, Shiro <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto"><code>DefaultBlockCipherService</code></a>s have attributes that can be set individually in
  a type-safe manner based on your configuration needs, and Shiro will build the transformation string for you.
  <p/>
  The following sections typically document the configuration options for block (byte array)
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a> method invocations.  Streaming configuration
  for those same attributes are done via mirrored <code>streaming</code>* attributes, and their purpose is identical, but
  they're only used during streaming <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-java.io.InputStream-java.io.OutputStream-byte:A-"><code>JcaCipherService.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:A-"><code>JcaCipherService.decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a> methods.  See the &quot;Streaming&quot;
  section below for more.

  <h3>Block Size</h3>
  The block size specifies the number of bits (not bytes) that the cipher operates on when performing an operation.
  It can be specified explicitly via the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setBlockSize-int-"><code>blockSize</code></a> attribute.  If not set, the JCA Provider
  default will be used based on the cipher algorithm.  Block sizes are usually very algorithm specific, so set this
  value only if you know you don't want the JCA Provider's default for the desired algorithm.  For example, the
  AES algorithm's Rijndael implementation <em>only</em> supports a 128 bit block size and will not work with any other
  size.
  <p/>
  Also note that the <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setInitializationVectorSize-int-"><code>initializationVectorSize</code></a> is usually the same as the
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setBlockSize-int-"><code>blockSize</code></a> in block ciphers.  If you change either attribute, you should ensure that the other
  attribute is correct for the target cipher algorithm.

  <h3>Operation Mode</h3>
  You may set the block cipher's<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation">mode of
  operation</a> via the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setMode-org.apache.shiro.crypto.OperationMode-"><code>mode</code></a> attribute, which accepts a type-safe
  <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum instance.  This type safety helps avoid typos when specifying the mode and
  guarantees that the mode name will be recognized by the underlying JCA Provider.
  <p/>
  <b>*</b>If no operation mode is specified, Shiro defaults all of its block <code>CipherService</code> instances to the
  <a href="../../../../org/apache/shiro/crypto/OperationMode.html#CBC"><code>CBC</code></a> mode, specifically to support auto-generation of initialization vectors during
  encryption.  This is different than the JDK's default <a href="../../../../org/apache/shiro/crypto/OperationMode.html#ECB"><code>ECB</code></a> mode because <code>ECB</code> does
  not support initialization vectors, which are necessary for strong encryption.  See  the
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html" title="class in org.apache.shiro.crypto"><code>JcaCipherService parent class</code></a> class JavaDoc for an extensive
  explanation on why we do this and why we do not use the Sun <code>ECB</code> default.  You also might also want read
  the <a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation#Electronic_codebook_.28ECB.29">Wikipedia
  section on ECB<a/> and look at the encrypted image to see an example of why <code>ECB</code> should not be used in
  security-sensitive environments.
  <p/>
  In the rare case that you need to override the default with a mode not represented
  by the <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum, you may specify the raw mode name string that will be recognized by your JCA
  provider via the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setModeName-java.lang.String-"><code>modeName</code></a> attribute.  Because this is not type-safe, it is recommended only to
  use this attribute if the <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum does not represent your desired mode.
  <p/>
  <b>NOTE:</b> If you change the mode to one that does not support initialization vectors (such as
  <a href="../../../../org/apache/shiro/crypto/OperationMode.html#ECB"><code>ECB</code></a> or <a href="../../../../org/apache/shiro/crypto/OperationMode.html#NONE"><code>NONE</code></a>), you <em>must</em> turn off auto-generated
  initialization vectors by setting <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setGenerateInitializationVectors-boolean-"><code>generateInitializationVectors</code></a>
  to <code>false</code>.  Abandoning initialization vectors significantly weakens encryption, so think twice before
  disabling this feature.

  <h3>Padding Scheme</h3>
  Because block ciphers process messages in fixed-length blocks, if the final block in a message is not equal to the
  block length, <a href="http://en.wikipedia.org/wiki/Padding_(cryptography)">padding</a> is applied to match that
  size to maintain the total length of the message.  This is good because it protects data patterns from being
  identified  - when all chunks look the same length, it is much harder to infer what that data might be.
  <p/>
  You may set a padding scheme via the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingScheme-org.apache.shiro.crypto.PaddingScheme-"><code>paddingScheme</code></a> attribute, which
  accepts a type-safe <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto"><code>PaddingScheme</code></a> enum instance.  Like the <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum,
  this enum offers type safety to help avoid typos and guarantees that the mode will be recongized by the underlying
  JCA provider.
  <p/>
  <b>*</b>If no padding scheme is specified, this class defaults to the <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html#PKCS5"><code>PaddingScheme.PKCS5</code></a> scheme, specifically
  to be compliant with the default behavior of auto-generating initialization vectors during encryption (see the
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html" title="class in org.apache.shiro.crypto"><code>JcaCipherService parent class</code></a> class JavaDoc for why).
  <p/>
  In the rare case that you need to override the default with a scheme not represented by the <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto"><code>PaddingScheme</code></a>
  enum, you may specify the raw padding scheme name string that will be recognized by your JCA provider via the
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingScheme-org.apache.shiro.crypto.PaddingScheme-"><code>paddingSchemeName</code></a> attribute.  Because this is not type-safe, it is recommended only to
  use this attribute if the <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto"><code>PaddingScheme</code></a> enum does not represent your desired scheme.

  <h2>Streaming</h2>
  Most people don't think of using block ciphers as stream ciphers, since their name implies working
  with block data (i.e. byte arrays) only.  However, block ciphers can be turned into byte-oriented stream ciphers by
  using an appropriate <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>operation mode</code></a> with a <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingBlockSize--"><code>streaming block size</code></a>
  of 8 bits.  This is why the <a href="../../../../org/apache/shiro/crypto/CipherService.html" title="interface in org.apache.shiro.crypto"><code>CipherService</code></a> interface provides both block and streaming operations.
  <p/>
  Because this streaming 8-bit block size rarely changes across block-cipher algorithms, default values have been set
  for all three streaming configuration parameters.  The defaults are:
  <ul>
  <li><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingBlockSize-int-"><code>streamingBlockSize</code></a> = <code>8</code> (bits)</li>
  <li><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingMode-org.apache.shiro.crypto.OperationMode-"><code>streamingMode</code></a> = <a href="../../../../org/apache/shiro/crypto/OperationMode.html#CBC"><code>CBC</code></a></li>
  <li><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingPaddingScheme-org.apache.shiro.crypto.PaddingScheme-"><code>streamingPaddingScheme</code></a> = <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html#PKCS5"><code>PKCS5</code></a></li>
  </ul>
  <p/>
  These attributes have the same meaning as the <code>mode</code>, <code>blockSize</code>, and <code>paddingScheme</code> attributes
  described above, but they are applied during streaming method invocations only (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-java.io.InputStream-java.io.OutputStream-byte:A-"><code>JcaCipherService.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:A-"><code>JcaCipherService.decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).</div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>1.0</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../org/apache/shiro/crypto/BlowfishCipherService.html" title="class in org.apache.shiro.crypto"><code>BlowfishCipherService</code></a>,
 <a href="../../../../org/apache/shiro/crypto/AesCipherService.html" title="class in org.apache.shiro.crypto"><code>AesCipherService</code></a>,
 <a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation">Wikipedia: Block Cipher Modes of Operation</a></dd>
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 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
 <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Constructor and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#DefaultBlockCipherService-java.lang.String-">DefaultBlockCipherService</a></span>(<a href="http://docs.oracle.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 <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto"><code>DefaultBlockCipherService</code></a> using the specified block cipher <code>algorithmName</code>.</div>
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 <h3>Method Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Method and Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>protected byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#generateInitializationVector-boolean-">generateInitializationVector</a></span>(boolean&nbsp;streaming)</code>&nbsp;</td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getBlockSize--">getBlockSize</a></span>()</code>
 <div class="block">Returns the block cipher's block size to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string or <code>0</code> if the JCA Provider default block size
  for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="http://docs.oracle.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><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getModeName--">getModeName</a></span>()</code>
 <div class="block">Returns the cipher operation mode name (as a String) to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string or <code>null</code> if the JCA Provider default mode for
  the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code><a href="http://docs.oracle.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><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getPaddingSchemeName--">getPaddingSchemeName</a></span>()</code>
 <div class="block">Returns the cipher algorithm padding scheme name (as a String) to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string or <code>null</code> if the JCA Provider default mode for
  the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingBlockSize--">getStreamingBlockSize</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><a href="http://docs.oracle.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><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingModeName--">getStreamingModeName</a></span>()</code>
 <div class="block">Same purpose as the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getModeName--"><code>modeName</code></a> attribute, but is used instead only for for streaming
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-java.io.InputStream-java.io.OutputStream-byte:A-"><code>JcaCipherService.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:A-"><code>JcaCipherService.decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><a href="http://docs.oracle.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><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingPaddingSchemeName--">getStreamingPaddingSchemeName</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>protected <a href="http://docs.oracle.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><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getTransformationString-boolean-">getTransformationString</a></span>(boolean&nbsp;streaming)</code>
 <div class="block">Returns the transformation string to use with the <a href="http://docs.oracle.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> call.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>protected boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#isGenerateInitializationVectors-boolean-">isGenerateInitializationVectors</a></span>(boolean&nbsp;streaming)</code>
 <div class="block">Overrides the parent implementation to ensure initialization vectors are always generated if streaming is
  enabled (block ciphers <em>must</em> use initialization vectors if they are to be used as a stream cipher).</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setBlockSize-int-">setBlockSize</a></span>(int&nbsp;blockSize)</code>
 <div class="block">Sets the block cipher's block size to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setMode-org.apache.shiro.crypto.OperationMode-">setMode</a></span>(<a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto">OperationMode</a>&nbsp;mode)</code>
 <div class="block">Sets the cipher operation mode of operation to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setModeName-java.lang.String-">setModeName</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;modeName)</code>
 <div class="block">Sets the cipher operation mode name to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingScheme-org.apache.shiro.crypto.PaddingScheme-">setPaddingScheme</a></span>(<a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto">PaddingScheme</a>&nbsp;paddingScheme)</code>
 <div class="block">Sets the padding scheme to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingSchemeName-java.lang.String-">setPaddingSchemeName</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;paddingSchemeName)</code>
 <div class="block">Sets the padding scheme name to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider default mode for
  the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingBlockSize-int-">setStreamingBlockSize</a></span>(int&nbsp;streamingBlockSize)</code>&nbsp;</td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingMode-org.apache.shiro.crypto.OperationMode-">setStreamingMode</a></span>(<a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto">OperationMode</a>&nbsp;mode)</code>
 <div class="block">Sets the transformation string mode to be used for streaming operations only.</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingModeName-java.lang.String-">setStreamingModeName</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;streamingModeName)</code>
 <div class="block">Sets the transformation string mode name to be used for streaming operations only.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingPaddingScheme-org.apache.shiro.crypto.PaddingScheme-">setStreamingPaddingScheme</a></span>(<a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto">PaddingScheme</a>&nbsp;scheme)</code>&nbsp;</td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingPaddingSchemeName-java.lang.String-">setStreamingPaddingSchemeName</a></span>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;streamingPaddingSchemeName)</code>&nbsp;</td>
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 <code><a href="../../../../org/apache/shiro/crypto/AbstractSymmetricCipherService.html#generateNewKey--">generateNewKey</a>, <a href="../../../../org/apache/shiro/crypto/AbstractSymmetricCipherService.html#generateNewKey-int-">generateNewKey</a></code></li>
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 <code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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 <pre>public&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.164">DefaultBlockCipherService</a>(<a href="http://docs.oracle.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 <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html" title="class in org.apache.shiro.crypto"><code>DefaultBlockCipherService</code></a> using the specified block cipher <code>algorithmName</code>.  Per this
  class's JavaDoc, this constructor also sets the following defaults:
  <ul>
  <li><code>streamingMode</code> = <a href="../../../../org/apache/shiro/crypto/OperationMode.html#CBC"><code>CBC</code></a></li>
  <li><code>streamingPaddingScheme</code> = <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html#NONE"><code>none</code></a></li>
  <li><code>streamingBlockSize</code> = 8</li>
  </ul>
  All other attributes are null/unset, indicating the JCA Provider defaults will be used.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>algorithmName</code> - the block cipher algorithm to use when encrypting and decrypting</dd>
 </dl>
 </li>
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 <h4>getModeName</h4>
 <pre>public&nbsp;<a href="http://docs.oracle.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/DefaultBlockCipherService.html#line.192">getModeName</a>()</pre>
 <div class="block">Returns the cipher operation mode name (as a String) to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string or <code>null</code> if the JCA Provider default mode for
  the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingModeName--"><code>streamingModeName</code></a> attribute is used when the block cipher is used for
  streaming operations.
  <p/>
  The default value is <code>null</code> to retain the JCA Provider default.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the cipher operation mode name (as a String) to be used when constructing the
          <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider default
          mode for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
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 <h4>setModeName</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.218">setModeName</a>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;modeName)</pre>
 <div class="block">Sets the cipher operation mode name to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.  A <code>null</code> value indicates that the JCA Provider
  default mode for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingModeName--"><code>streamingModeName</code></a> attribute is used when the block cipher is used for
  streaming operations.
  <p/>
  The default value is <code>null</code> to retain the JCA Provider default.
  <p/>
  <b>NOTE:</b> most standard mode names are represented by the <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum.  That enum
  should be used with the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setMode-org.apache.shiro.crypto.OperationMode-"><code>mode</code></a> attribute when possible to retain type-safety and reduce the
  possibility of errors.  This method is better used if the <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum does not represent the
  necessary mode.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>modeName</code> - the cipher operation mode name to be used when constructing
                  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider
                  default mode for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setMode-org.apache.shiro.crypto.OperationMode-"><code>setMode(org.apache.shiro.crypto.OperationMode)</code></a></dd>
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 <h4>setMode</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.242">setMode</a>(<a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto">OperationMode</a>&nbsp;mode)</pre>
 <div class="block">Sets the cipher operation mode of operation to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.  A <code>null</code> value indicates that the JCA Provider
  default mode for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingMode-org.apache.shiro.crypto.OperationMode-"><code>streamingMode</code></a> attribute is used when the block cipher is used for
  streaming operations.
  <p/>
  If the <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> enum cannot represent your desired mode, you can set the name explicitly
  via the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setModeName-java.lang.String-"><code>modeName</code></a> attribute directly.  However, because <a href="../../../../org/apache/shiro/crypto/OperationMode.html" title="enum in org.apache.shiro.crypto"><code>OperationMode</code></a> represents all
  standard JDK mode names already, ensure that your underlying JCA Provider supports the non-standard name first.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>mode</code> - the cipher operation mode to be used when constructing
              <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider
              default mode for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
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 <h4>getPaddingSchemeName</h4>
 <pre>public&nbsp;<a href="http://docs.oracle.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/DefaultBlockCipherService.html#line.262">getPaddingSchemeName</a>()</pre>
 <div class="block">Returns the cipher algorithm padding scheme name (as a String) to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string or <code>null</code> if the JCA Provider default mode for
  the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingPaddingSchemeName--"><code>streamingPaddingSchemeName</code></a> attribute is used when the block cipher is
  used for streaming operations.
  <p/>
  The default value is <code>null</code> to retain the JCA Provider default.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the padding scheme name (as a String) to be used when constructing the
          <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider default
          padding scheme for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
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 <h4>setPaddingSchemeName</h4>
 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.289">setPaddingSchemeName</a>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;paddingSchemeName)</pre>
 <div class="block">Sets the padding scheme name to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider default mode for
  the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingPaddingSchemeName--"><code>streamingPaddingSchemeName</code></a> attribute is used when the block cipher is
  used for streaming operations.
  <p/>
  The default value is <code>null</code> to retain the JCA Provider default.
  <p/>
  <b>NOTE:</b> most standard padding schemes are represented by the <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto"><code>PaddingScheme</code></a> enum.
  That enum should be used with the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingScheme-org.apache.shiro.crypto.PaddingScheme-"><code>paddingScheme</code></a> attribute when possible to retain
  type-safety and reduce the possibility of errors.  Calling this method however is suitable if the
  <code>PaddingScheme</code> enum does not represent the desired scheme.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>paddingSchemeName</code> - the padding scheme name to be used when constructing
                           <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA
                           Provider default padding scheme for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a>
                           should be used.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingScheme-org.apache.shiro.crypto.PaddingScheme-"><code>setPaddingScheme(org.apache.shiro.crypto.PaddingScheme)</code></a></dd>
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 <pre>public&nbsp;void&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.314">setPaddingScheme</a>(<a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto">PaddingScheme</a>&nbsp;paddingScheme)</pre>
 <div class="block">Sets the padding scheme to be used when constructing the
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string. A <code>null</code> value indicates that the JCA Provider
  default padding scheme for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setStreamingPaddingScheme-org.apache.shiro.crypto.PaddingScheme-"><code>streamingPaddingScheme</code></a> attribute is used when the block cipher is used for
  streaming operations.
  <p/>
  If the <a href="../../../../org/apache/shiro/crypto/PaddingScheme.html" title="enum in org.apache.shiro.crypto"><code>PaddingScheme</code></a> enum does represent your desired scheme, you can set the name explicitly
  via the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#setPaddingSchemeName-java.lang.String-"><code>paddingSchemeName</code></a> attribute directly.  However, because
  <code>PaddingScheme</code> represents all standard JDK scheme names already, ensure that your underlying JCA Provider
  supports the non-standard name first.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>paddingScheme</code> - the padding scheme to be used when constructing
                       <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>null</code> if the JCA Provider
                       default padding scheme for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
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 <div class="block">Returns the block cipher's block size to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string or <code>0</code> if the JCA Provider default block size
  for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingBlockSize--"><code>streamingBlockSize</code></a> attribute is used when the block cipher is used for
  streaming operations.
  <p/>
  The default value is <code>0</code> which retains the JCA Provider default.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the block cipher block size to be used when constructing the
          <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>0</code> if the JCA Provider default
          block size for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
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 <div class="block">Sets the block cipher's block size to be used when constructing
  <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string.  <code>0</code> indicates that the JCA Provider default
  block size for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.
  <p/>
  This attribute is used <em>only</em> when constructing the transformation string for block (byte array)
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-byte:A-byte:A-"><code>JcaCipherService.encrypt(byte[], byte[])</code></a> and <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#decrypt-byte:A-byte:A-"><code>JcaCipherService.decrypt(byte[], byte[])</code></a>).  The
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getStreamingBlockSize--"><code>streamingBlockSize</code></a> attribute is used when the block cipher is used for
  streaming operations.
  <p/>
  The default value is <code>0</code> which retains the JCA Provider default.
  <p/>
  <b>NOTE:</b> block cipher block sizes are very algorithm-specific.  If you change this value, ensure that it
  will work with the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>blockSize</code> - the block cipher block size to be used when constructing the
                   <a href="http://docs.oracle.com/javase/6/docs/api/javax/crypto/Cipher.html?is-external=true" title="class or interface in javax.crypto"><code>Cipher</code></a> transformation string, or <code>0</code> if the JCA Provider
                   default block size for the specified <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getAlgorithmName--"><code>algorithm</code></a> should be used.</dd>
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 <pre>public&nbsp;<a href="http://docs.oracle.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/DefaultBlockCipherService.html#line.374">getStreamingModeName</a>()</pre>
 <div class="block">Same purpose as the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getModeName--"><code>modeName</code></a> attribute, but is used instead only for for streaming
  operations (<a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#encrypt-java.io.InputStream-java.io.OutputStream-byte:A-"><code>JcaCipherService.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:A-"><code>JcaCipherService.decrypt(java.io.InputStream, java.io.OutputStream, byte[])</code></a>).
  <p/>
  Note that unlike the <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getModeName--"><code>modeName</code></a> attribute, the default value of this attribute is not
  <code>null</code> - it is <a href="../../../../org/apache/shiro/crypto/OperationMode.html#CBC"><code>CBC</code></a> for reasons described in the class-level JavaDoc in the
  <code>Streaming</code> section.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the transformation string mode name to be used for streaming operations only.</dd>
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 <div class="block">Sets the transformation string mode name to be used for streaming operations only.  The default value is
  <a href="../../../../org/apache/shiro/crypto/OperationMode.html#CBC"><code>CBC</code></a> for reasons described in the class-level JavaDoc in the <code>Streaming</code> section.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>streamingModeName</code> - transformation string mode name to be used for streaming operations only</dd>
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 <div class="block">Sets the transformation string mode to be used for streaming operations only.  The default value is
  <a href="../../../../org/apache/shiro/crypto/OperationMode.html#CBC"><code>CBC</code></a> for reasons described in the class-level JavaDoc in the <code>Streaming</code> section.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>mode</code> - the transformation string mode to be used for streaming operations only</dd>
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 <pre>protected&nbsp;<a href="http://docs.oracle.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/DefaultBlockCipherService.html#line.444">getTransformationString</a>(boolean&nbsp;streaming)</pre>
 <div class="block">Returns the transformation string to use with the <a href="http://docs.oracle.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> call.  If
  <code>streaming</code> is <code>true</code>, a block-cipher transformation string compatible with streaming operations will
  be constructed and cached for re-use later (see the class-level JavaDoc for more on using block ciphers
  for streaming).  If <code>streaming</code> is <code>false</code> a normal block-cipher transformation string will
  be constructed and cached for later re-use.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#getTransformationString-boolean-">getTransformationString</a></code>&nbsp;in class&nbsp;<code><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html" title="class in org.apache.shiro.crypto">JcaCipherService</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>streaming</code> - if the transformation string is going to be used for a Cipher performing stream-based encryption or not.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the transformation string</dd>
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 <pre>protected&nbsp;boolean&nbsp;<a href="../../../../src-html/org/apache/shiro/crypto/DefaultBlockCipherService.html#line.506">isGenerateInitializationVectors</a>(boolean&nbsp;streaming)</pre>
 <div class="block">Overrides the parent implementation to ensure initialization vectors are always generated if streaming is
  enabled (block ciphers <em>must</em> use initialization vectors if they are to be used as a stream cipher).  If
  not being used as a stream cipher, then the value is computed based on whether or not the currently configured
  <a href="../../../../org/apache/shiro/crypto/DefaultBlockCipherService.html#getModeName--"><code>modeName</code></a> is compatible with initialization vectors as well as the result of the configured
  <a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#setGenerateInitializationVectors-boolean-"><code>generateInitializationVectors</code></a> value.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#isGenerateInitializationVectors-boolean-">isGenerateInitializationVectors</a></code>&nbsp;in class&nbsp;<code><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html" title="class in org.apache.shiro.crypto">JcaCipherService</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>streaming</code> - whether or not streaming is being performed</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd><code>true</code> if streaming or a value computed based on if the currently configured mode is compatible
          with initialization vectors.</dd>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html#generateInitializationVector-boolean-">generateInitializationVector</a></code>&nbsp;in class&nbsp;<code><a href="../../../../org/apache/shiro/crypto/JcaCipherService.html" title="class in org.apache.shiro.crypto">JcaCipherService</a></code></dd>
 </dl>
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