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<a class="jxr_linenumber" name="L1" href="#L1">1</a> <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="L2" href="#L2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em>
<a class="jxr_linenumber" name="L3" href="#L3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em>
<a class="jxr_linenumber" name="L4" href="#L4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em>
<a class="jxr_linenumber" name="L5" href="#L5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em>
<a class="jxr_linenumber" name="L6" href="#L6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em>
<a class="jxr_linenumber" name="L7" href="#L7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="L8" href="#L8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="L9" href="#L9">9</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L10" href="#L10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="L11" href="#L11">11</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L12" href="#L12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em>
<a class="jxr_linenumber" name="L13" href="#L13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em>
<a class="jxr_linenumber" name="L14" href="#L14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em>
<a class="jxr_linenumber" name="L15" href="#L15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em>
<a class="jxr_linenumber" name="L16" href="#L16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="L17" href="#L17">17</a> <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="L18" href="#L18">18</a> <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="L19" href="#L19">19</a> <strong class="jxr_keyword">package</strong> org.apache.shiro.crypto;
<a class="jxr_linenumber" name="L20" href="#L20">20</a>
<a class="jxr_linenumber" name="L21" href="#L21">21</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L22" href="#L22">22</a> <em class="jxr_javadoccomment"> * A cipher &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>"&gt;mode of operation&lt;/a&gt;</em>
<a class="jxr_linenumber" name="L23" href="#L23">23</a> <em class="jxr_javadoccomment"> * directs a cipher algorithm how to convert data during the encryption or decryption process. This enum represents</em>
<a class="jxr_linenumber" name="L24" href="#L24">24</a> <em class="jxr_javadoccomment"> * all JDK-standard Cipher operation mode names as defined in</em>
<a class="jxr_linenumber" name="L25" href="#L25">25</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://java.sun.com/javase/6/docs/technotes/guides/security/StandardNames.html" target="alexandria_uri">http://java.sun.com/javase/6/docs/technotes/guides/security/StandardNames.html</a>"&gt;JDK Security Standard</em>
<a class="jxr_linenumber" name="L26" href="#L26">26</a> <em class="jxr_javadoccomment"> * Names&lt;/a&gt;, as well as a few more that are well-known and supported by other JCA Providers.</em>
<a class="jxr_linenumber" name="L27" href="#L27">27</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L28" href="#L28">28</a> <em class="jxr_javadoccomment"> * This {@code enum} exists to provide Shiro end-users type-safety when declaring an operation mode. This helps reduce</em>
<a class="jxr_linenumber" name="L29" href="#L29">29</a> <em class="jxr_javadoccomment"> * error by providing a compile-time mechanism to specify a mode and guarantees a valid name that will be</em>
<a class="jxr_linenumber" name="L30" href="#L30">30</a> <em class="jxr_javadoccomment"> * recognized by an underlying JCA Provider.</em>
<a class="jxr_linenumber" name="L31" href="#L31">31</a> <em class="jxr_javadoccomment"> * &lt;h2&gt;Standard or Non-Standard?&lt;/h2&gt;</em>
<a class="jxr_linenumber" name="L32" href="#L32">32</a> <em class="jxr_javadoccomment"> * All modes listed specify whether they are a JDK standard mode or a non-standard mode. Standard modes are included</em>
<a class="jxr_linenumber" name="L33" href="#L33">33</a> <em class="jxr_javadoccomment"> * in all JDK distributions. Non-standard modes can</em>
<a class="jxr_linenumber" name="L34" href="#L34">34</a> <em class="jxr_javadoccomment"> * sometimes result in better performance or more secure output, but may not be available on the target JDK</em>
<a class="jxr_linenumber" name="L35" href="#L35">35</a> <em class="jxr_javadoccomment"> * platform and rely on an external JCA Provider to be installed. Some providers</em>
<a class="jxr_linenumber" name="L36" href="#L36">36</a> <em class="jxr_javadoccomment"> * (like &lt;a href="<a href="http://www.bouncycastle.org" target="alexandria_uri">http://www.bouncycastle.org</a>"&gt;Bouncy Castle&lt;/a&gt;) may support these modes however.</em>
<a class="jxr_linenumber" name="L37" href="#L37">37</a> <em class="jxr_javadoccomment"> *</em>
<a class="jxr_linenumber" name="L38" href="#L38">38</a> <em class="jxr_javadoccomment"> * @see &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>"&gt;Block Cipher Modes of Operation&lt;a/&gt;</em>
<a class="jxr_linenumber" name="L39" href="#L39">39</a> <em class="jxr_javadoccomment"> * @since 1.0</em>
<a class="jxr_linenumber" name="L40" href="#L40">40</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L41" href="#L41">41</a> <strong class="jxr_keyword">public</strong> enum <a name="OperationMode" href="../../../../org/apache/shiro/crypto/OperationMode.html#OperationMode">OperationMode</a> {
<a class="jxr_linenumber" name="L42" href="#L42">42</a>
<a class="jxr_linenumber" name="L43" href="#L43">43</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L44" href="#L44">44</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>#Cipher-block_chaining_.28CBC.29"&gt;</em>
<a class="jxr_linenumber" name="L45" href="#L45">45</a> <em class="jxr_javadoccomment"> * Cipher-block Chaining&lt;/a&gt; mode, defined in &lt;a href="<a href="http://csrc.nist.gov/publications/fips/index.html" target="alexandria_uri">http://csrc.nist.gov/publications/fips/index.html</a>"&gt;FIPS</em>
<a class="jxr_linenumber" name="L46" href="#L46">46</a> <em class="jxr_javadoccomment"> * PUB 81&lt;/a&gt;.</em>
<a class="jxr_linenumber" name="L47" href="#L47">47</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L48" href="#L48">48</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L49" href="#L49">49</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L50" href="#L50">50</a> CBC,
<a class="jxr_linenumber" name="L51" href="#L51">51</a>
<a class="jxr_linenumber" name="L52" href="#L52">52</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L53" href="#L53">53</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/CCM_mode" target="alexandria_uri">http://en.wikipedia.org/wiki/CCM_mode</a>"&gt;Counter with CBC-MAC&lt;/a&gt; mode&lt;b&gt;*&lt;/b&gt; - for block ciphers with</em>
<a class="jxr_linenumber" name="L54" href="#L54">54</a> <em class="jxr_javadoccomment"> * 128 bit block-size only. See &lt;a href="<a href="http://www.ietf.org/rfc/rfc3610.txt" target="alexandria_uri">http://www.ietf.org/rfc/rfc3610.txt</a>"&gt;RFC 3610&lt;/a&gt; for AES Ciphers.</em>
<a class="jxr_linenumber" name="L55" href="#L55">55</a> <em class="jxr_javadoccomment"> * This mode has essentially been replaced by the more-capable {@link #EAX EAX} mode.</em>
<a class="jxr_linenumber" name="L56" href="#L56">56</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L57" href="#L57">57</a> <em class="jxr_javadoccomment"> * &lt;b&gt;*THIS IS A NON-STANDARD MODE&lt;/b&gt;. It is not guaranteed to be supported across JDK installations. You must</em>
<a class="jxr_linenumber" name="L58" href="#L58">58</a> <em class="jxr_javadoccomment"> * ensure you have a JCA Provider that can support this cipher operation mode.</em>
<a class="jxr_linenumber" name="L59" href="#L59">59</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://www.bouncycastle.org" target="alexandria_uri">http://www.bouncycastle.org</a>"&gt;Bouncy Castle&lt;/a&gt; &lt;em&gt;may&lt;/em&gt; be one such provider.</em>
<a class="jxr_linenumber" name="L60" href="#L60">60</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L61" href="#L61">61</a> CCM,
<a class="jxr_linenumber" name="L62" href="#L62">62</a>
<a class="jxr_linenumber" name="L63" href="#L63">63</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L64" href="#L64">64</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>#Cipher_feedback_.28CFB.29"&gt;Cipher</em>
<a class="jxr_linenumber" name="L65" href="#L65">65</a> <em class="jxr_javadoccomment"> * Feedback&lt;a/&gt; mode, defined in &lt;a href="<a href="http://csrc.nist.gov/publications/fips/index.html" target="alexandria_uri">http://csrc.nist.gov/publications/fips/index.html</a>"&gt;FIPS PUB 81&lt;/a&gt;.</em>
<a class="jxr_linenumber" name="L66" href="#L66">66</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L67" href="#L67">67</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L68" href="#L68">68</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L69" href="#L69">69</a> CFB,
<a class="jxr_linenumber" name="L70" href="#L70">70</a>
<a class="jxr_linenumber" name="L71" href="#L71">71</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L72" href="#L72">72</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>#Counter_.28CTR.29"&gt;Counter Mode&lt;/a&gt;, aka</em>
<a class="jxr_linenumber" name="L73" href="#L73">73</a> <em class="jxr_javadoccomment"> * Integer Counter Mode (ICM) and Segmented Integer Counter (SIC). Counter is a simplification of {@link #OFB OFB}</em>
<a class="jxr_linenumber" name="L74" href="#L74">74</a> <em class="jxr_javadoccomment"> * and updates the input block as a counter.</em>
<a class="jxr_linenumber" name="L75" href="#L75">75</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L76" href="#L76">76</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L77" href="#L77">77</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L78" href="#L78">78</a> CTR,
<a class="jxr_linenumber" name="L79" href="#L79">79</a>
<a class="jxr_linenumber" name="L80" href="#L80">80</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L81" href="#L81">81</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/EAX_mode" target="alexandria_uri">http://en.wikipedia.org/wiki/EAX_mode</a>"&gt;EAX Mode&lt;/a&gt;&lt;b&gt;*&lt;/b&gt;. This is a patent-free but less-effecient</em>
<a class="jxr_linenumber" name="L82" href="#L82">82</a> <em class="jxr_javadoccomment"> * alternative to {@link #OCB OCB} and has capabilities beyond what {@link #CCM CCM} can provide.</em>
<a class="jxr_linenumber" name="L83" href="#L83">83</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L84" href="#L84">84</a> <em class="jxr_javadoccomment"> * &lt;b&gt;*THIS IS A NON-STANDARD MODE&lt;/b&gt;. It is not guaranteed to be supported across JDK installations. You must</em>
<a class="jxr_linenumber" name="L85" href="#L85">85</a> <em class="jxr_javadoccomment"> * ensure you have a JCA Provider that can support this cipher operation mode.</em>
<a class="jxr_linenumber" name="L86" href="#L86">86</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://www.bouncycastle.org" target="alexandria_uri">http://www.bouncycastle.org</a>"&gt;Bouncy Castle&lt;/a&gt; &lt;em&gt;may&lt;/em&gt; be one such provider.</em>
<a class="jxr_linenumber" name="L87" href="#L87">87</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L88" href="#L88">88</a> EAX,
<a class="jxr_linenumber" name="L89" href="#L89">89</a>
<a class="jxr_linenumber" name="L90" href="#L90">90</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L91" href="#L91">91</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>#Electronic_codebook_.28ECB.29"&gt;Electronic</em>
<a class="jxr_linenumber" name="L92" href="#L92">92</a> <em class="jxr_javadoccomment"> * Codebook&lt;/a&gt; mode, defined in &lt;a href="<a href="http://csrc.nist.gov/publications/fips/index.html" target="alexandria_uri">http://csrc.nist.gov/publications/fips/index.html</a>"&gt;FIPS PUB 81&lt;/a&gt;.</em>
<a class="jxr_linenumber" name="L93" href="#L93">93</a> <em class="jxr_javadoccomment"> * ECB is the only mode that does &lt;em&gt;not&lt;/em&gt; require an Initialization Vector, but because of this, can be seen</em>
<a class="jxr_linenumber" name="L94" href="#L94">94</a> <em class="jxr_javadoccomment"> * as less secure than operation modes that require an IV.</em>
<a class="jxr_linenumber" name="L95" href="#L95">95</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L96" href="#L96">96</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L97" href="#L97">97</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L98" href="#L98">98</a> ECB,
<a class="jxr_linenumber" name="L99" href="#L99">99</a>
<a class="jxr_linenumber" name="L100" href="#L100">100</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L101" href="#L101">101</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/GCM_mode" target="alexandria_uri">http://en.wikipedia.org/wiki/GCM_mode</a>"&gt;Galois/Counter&lt;/a&gt; mode&lt;b&gt;*&lt;/b&gt; - for block ciphers with 128</em>
<a class="jxr_linenumber" name="L102" href="#L102">102</a> <em class="jxr_javadoccomment"> * bit block-size only.</em>
<a class="jxr_linenumber" name="L103" href="#L103">103</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L104" href="#L104">104</a> <em class="jxr_javadoccomment"> * &lt;b&gt;*THIS IS A NON-STANDARD MODE&lt;/b&gt;. It is not guaranteed to be supported across JDK installations. You must</em>
<a class="jxr_linenumber" name="L105" href="#L105">105</a> <em class="jxr_javadoccomment"> * ensure you have a JCA Provider that can support this cipher operation mode.</em>
<a class="jxr_linenumber" name="L106" href="#L106">106</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://www.bouncycastle.org" target="alexandria_uri">http://www.bouncycastle.org</a>"&gt;Bouncy Castle&lt;/a&gt; &lt;em&gt;may&lt;/em&gt; be one such provider.</em>
<a class="jxr_linenumber" name="L107" href="#L107">107</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L108" href="#L108">108</a> GCM,
<a class="jxr_linenumber" name="L109" href="#L109">109</a>
<a class="jxr_linenumber" name="L110" href="#L110">110</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L111" href="#L111">111</a> <em class="jxr_javadoccomment"> * No mode.</em>
<a class="jxr_linenumber" name="L112" href="#L112">112</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L113" href="#L113">113</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L114" href="#L114">114</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L115" href="#L115">115</a> NONE,
<a class="jxr_linenumber" name="L116" href="#L116">116</a>
<a class="jxr_linenumber" name="L117" href="#L117">117</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L118" href="#L118">118</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/OCB_mode" target="alexandria_uri">http://en.wikipedia.org/wiki/OCB_mode</a>"&gt;Offset Codebook&lt;/a&gt; mode&lt;b&gt;*&lt;/b&gt;. Parallel mode that provides</em>
<a class="jxr_linenumber" name="L119" href="#L119">119</a> <em class="jxr_javadoccomment"> * both message privacy and authenticity in a single pass. This is a very efficient mode, but is patent-encumbered.</em>
<a class="jxr_linenumber" name="L120" href="#L120">120</a> <em class="jxr_javadoccomment"> * A less-efficient (two pass) alternative is available by using {@link #EAX EAX} mode.</em>
<a class="jxr_linenumber" name="L121" href="#L121">121</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L122" href="#L122">122</a> <em class="jxr_javadoccomment"> * &lt;b&gt;*THIS IS A NON-STANDARD MODE&lt;/b&gt;. It is not guaranteed to be supported across JDK installations. You must</em>
<a class="jxr_linenumber" name="L123" href="#L123">123</a> <em class="jxr_javadoccomment"> * ensure you have a JCA Provider that can support this cipher operation mode.</em>
<a class="jxr_linenumber" name="L124" href="#L124">124</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://www.bouncycastle.org" target="alexandria_uri">http://www.bouncycastle.org</a>"&gt;Bouncy Castle&lt;/a&gt; &lt;em&gt;may&lt;/em&gt; be one such provider.</em>
<a class="jxr_linenumber" name="L125" href="#L125">125</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L126" href="#L126">126</a> OCB,
<a class="jxr_linenumber" name="L127" href="#L127">127</a>
<a class="jxr_linenumber" name="L128" href="#L128">128</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L129" href="#L129">129</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>#Output_feedback_.28OFB.29"&gt;Output</em>
<a class="jxr_linenumber" name="L130" href="#L130">130</a> <em class="jxr_javadoccomment"> * Feedback&lt;/a&gt; mode, defined in &lt;a href="<a href="http://csrc.nist.gov/publications/fips/index.html" target="alexandria_uri">http://csrc.nist.gov/publications/fips/index.html</a>"&gt;FIPS PUB 81&lt;/a&gt;.</em>
<a class="jxr_linenumber" name="L131" href="#L131">131</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L132" href="#L132">132</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L133" href="#L133">133</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L134" href="#L134">134</a> OFB,
<a class="jxr_linenumber" name="L135" href="#L135">135</a>
<a class="jxr_linenumber" name="L136" href="#L136">136</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L137" href="#L137">137</a> <em class="jxr_javadoccomment"> * &lt;a href="<a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation" target="alexandria_uri">http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation</a>#Propagating_cipher-block_chaining_.28PCBC.29"&gt;</em>
<a class="jxr_linenumber" name="L138" href="#L138">138</a> <em class="jxr_javadoccomment"> * Propagating Cipher Block Chaining&lt;/a&gt; mode, defined in &lt;a href="<a href="http://web.mit.edu/kerberos/" target="alexandria_uri">http://web.mit.edu/kerberos/</a>"&gt;Kerberos version 4&lt;a/&gt;.</em>
<a class="jxr_linenumber" name="L139" href="#L139">139</a> <em class="jxr_javadoccomment"> * &lt;p/&gt;</em>
<a class="jxr_linenumber" name="L140" href="#L140">140</a> <em class="jxr_javadoccomment"> * This is a standard JDK operation mode and should be supported by all JDK environments.</em>
<a class="jxr_linenumber" name="L141" href="#L141">141</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L142" href="#L142">142</a> PCBC
<a class="jxr_linenumber" name="L143" href="#L143">143</a> }
</pre>
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