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| <a class="jxr_linenumber" name="1" href="#1">1</a> <strong class="jxr_keyword">package</strong> org.apache.mina.proxy.utils; |
| <a class="jxr_linenumber" name="2" href="#2">2</a> |
| <a class="jxr_linenumber" name="3" href="#3">3</a> <strong class="jxr_keyword">import</strong> java.security.DigestException; |
| <a class="jxr_linenumber" name="4" href="#4">4</a> <strong class="jxr_keyword">import</strong> java.security.MessageDigestSpi; |
| <a class="jxr_linenumber" name="5" href="#5">5</a> |
| <a class="jxr_linenumber" name="6" href="#6">6</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="7" href="#7">7</a> <em class="jxr_javadoccomment"> * MD4.java - An implementation of Ron Rivest's MD4 message digest algorithm.</em> |
| <a class="jxr_linenumber" name="8" href="#8">8</a> <em class="jxr_javadoccomment"> * The MD4 algorithm is designed to be quite fast on 32-bit machines. In</em> |
| <a class="jxr_linenumber" name="9" href="#9">9</a> <em class="jxr_javadoccomment"> * addition, the MD4 algorithm does not require any large substitution</em> |
| <a class="jxr_linenumber" name="10" href="#10">10</a> <em class="jxr_javadoccomment"> * tables.</em> |
| <a class="jxr_linenumber" name="11" href="#11">11</a> <em class="jxr_javadoccomment"> *</em> |
| <a class="jxr_linenumber" name="12" href="#12">12</a> <em class="jxr_javadoccomment"> * @see The <a href="<a href="http://www.ietf.org/rfc/rfc1320.txt" target="alexandria_uri">http://www.ietf.org/rfc/rfc1320.txt</a>">MD4</a> Message-</em> |
| <a class="jxr_linenumber" name="13" href="#13">13</a> <em class="jxr_javadoccomment"> * Digest Algorithm by R. Rivest.</em> |
| <a class="jxr_linenumber" name="14" href="#14">14</a> <em class="jxr_javadoccomment"> *</em> |
| <a class="jxr_linenumber" name="15" href="#15">15</a> <em class="jxr_javadoccomment"> * @author <a href="<a href="http://mina.apache.org" target="alexandria_uri">http://mina.apache.org</a>">Apache MINA Project</a></em> |
| <a class="jxr_linenumber" name="16" href="#16">16</a> <em class="jxr_javadoccomment"> * @since MINA 2.0.0-M3</em> |
| <a class="jxr_linenumber" name="17" href="#17">17</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="18" href="#18">18</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> MD4 <strong class="jxr_keyword">extends</strong> MessageDigestSpi { |
| <a class="jxr_linenumber" name="19" href="#19">19</a> |
| <a class="jxr_linenumber" name="20" href="#20">20</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="21" href="#21">21</a> <em class="jxr_javadoccomment"> * The MD4 algorithm message digest length is 16 bytes wide.</em> |
| <a class="jxr_linenumber" name="22" href="#22">22</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BYTE_DIGEST_LENGTH = 16; |
| <a class="jxr_linenumber" name="24" href="#24">24</a> |
| <a class="jxr_linenumber" name="25" href="#25">25</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="26" href="#26">26</a> <em class="jxr_javadoccomment"> * The MD4 algorithm block length is 64 bytes wide.</em> |
| <a class="jxr_linenumber" name="27" href="#27">27</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="28" href="#28">28</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> BYTE_BLOCK_LENGTH = 64; |
| <a class="jxr_linenumber" name="29" href="#29">29</a> |
| <a class="jxr_linenumber" name="30" href="#30">30</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="31" href="#31">31</a> <em class="jxr_javadoccomment"> * The initial values of the four registers. RFC gives the values </em> |
| <a class="jxr_linenumber" name="32" href="#32">32</a> <em class="jxr_javadoccomment"> * in LE so we converted it as JAVA uses BE endianness.</em> |
| <a class="jxr_linenumber" name="33" href="#33">33</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="34" href="#34">34</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> A = 0x67452301; |
| <a class="jxr_linenumber" name="35" href="#35">35</a> |
| <a class="jxr_linenumber" name="36" href="#36">36</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> B = 0xefcdab89; |
| <a class="jxr_linenumber" name="37" href="#37">37</a> |
| <a class="jxr_linenumber" name="38" href="#38">38</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> C = 0x98badcfe; |
| <a class="jxr_linenumber" name="39" href="#39">39</a> |
| <a class="jxr_linenumber" name="40" href="#40">40</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">int</strong> D = 0x10325476; |
| <a class="jxr_linenumber" name="41" href="#41">41</a> |
| <a class="jxr_linenumber" name="42" href="#42">42</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * The four registers initialized with the above IVs.</em> |
| <a class="jxr_linenumber" name="44" href="#44">44</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="45" href="#45">45</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> a = A; |
| <a class="jxr_linenumber" name="46" href="#46">46</a> |
| <a class="jxr_linenumber" name="47" href="#47">47</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> b = B; |
| <a class="jxr_linenumber" name="48" href="#48">48</a> |
| <a class="jxr_linenumber" name="49" href="#49">49</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> c = C; |
| <a class="jxr_linenumber" name="50" href="#50">50</a> |
| <a class="jxr_linenumber" name="51" href="#51">51</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">int</strong> d = D; |
| <a class="jxr_linenumber" name="52" href="#52">52</a> |
| <a class="jxr_linenumber" name="53" href="#53">53</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * Counts the total length of the data being digested.</em> |
| <a class="jxr_linenumber" name="55" href="#55">55</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="56" href="#56">56</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">long</strong> msgLength; |
| <a class="jxr_linenumber" name="57" href="#57">57</a> |
| <a class="jxr_linenumber" name="58" href="#58">58</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * The internal buffer is {@link BLOCK_LENGTH} wide.</em> |
| <a class="jxr_linenumber" name="60" href="#60">60</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="61" href="#61">61</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> byte[] buffer = <strong class="jxr_keyword">new</strong> byte[BYTE_BLOCK_LENGTH]; |
| <a class="jxr_linenumber" name="62" href="#62">62</a> |
| <a class="jxr_linenumber" name="63" href="#63">63</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="64" href="#64">64</a> <em class="jxr_javadoccomment"> * Default constructor.</em> |
| <a class="jxr_linenumber" name="65" href="#65">65</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="66" href="#66">66</a> <strong class="jxr_keyword">public</strong> MD4() { |
| <a class="jxr_linenumber" name="67" href="#67">67</a> <em class="jxr_comment">// Do nothing</em> |
| <a class="jxr_linenumber" name="68" href="#68">68</a> } |
| <a class="jxr_linenumber" name="69" href="#69">69</a> |
| <a class="jxr_linenumber" name="70" href="#70">70</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * Returns the digest length in bytes.</em> |
| <a class="jxr_linenumber" name="72" href="#72">72</a> <em class="jxr_javadoccomment"> *</em> |
| <a class="jxr_linenumber" name="73" href="#73">73</a> <em class="jxr_javadoccomment"> * @return the digest length in bytes.</em> |
| <a class="jxr_linenumber" name="74" href="#74">74</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="75" href="#75">75</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> engineGetDigestLength() { |
| <a class="jxr_linenumber" name="76" href="#76">76</a> <strong class="jxr_keyword">return</strong> BYTE_DIGEST_LENGTH; |
| <a class="jxr_linenumber" name="77" href="#77">77</a> } |
| <a class="jxr_linenumber" name="78" href="#78">78</a> |
| <a class="jxr_linenumber" name="79" href="#79">79</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="80" href="#80">80</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em> |
| <a class="jxr_linenumber" name="81" href="#81">81</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> engineUpdate(byte b) { |
| <a class="jxr_linenumber" name="83" href="#83">83</a> <strong class="jxr_keyword">int</strong> pos = (<strong class="jxr_keyword">int</strong>) (msgLength % BYTE_BLOCK_LENGTH); |
| <a class="jxr_linenumber" name="84" href="#84">84</a> buffer[pos] = b; |
| <a class="jxr_linenumber" name="85" href="#85">85</a> msgLength++; |
| <a class="jxr_linenumber" name="86" href="#86">86</a> |
| <a class="jxr_linenumber" name="87" href="#87">87</a> <em class="jxr_comment">// If buffer contains enough data then process it.</em> |
| <a class="jxr_linenumber" name="88" href="#88">88</a> <strong class="jxr_keyword">if</strong> (pos == (BYTE_BLOCK_LENGTH - 1)) { |
| <a class="jxr_linenumber" name="89" href="#89">89</a> process(buffer, 0); |
| <a class="jxr_linenumber" name="90" href="#90">90</a> } |
| <a class="jxr_linenumber" name="91" href="#91">91</a> } |
| <a class="jxr_linenumber" name="92" href="#92">92</a> |
| <a class="jxr_linenumber" name="93" href="#93">93</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="94" href="#94">94</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em> |
| <a class="jxr_linenumber" name="95" href="#95">95</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="96" href="#96">96</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> engineUpdate(byte[] b, <strong class="jxr_keyword">int</strong> offset, <strong class="jxr_keyword">int</strong> len) { |
| <a class="jxr_linenumber" name="97" href="#97">97</a> <strong class="jxr_keyword">int</strong> pos = (<strong class="jxr_keyword">int</strong>) (msgLength % BYTE_BLOCK_LENGTH); |
| <a class="jxr_linenumber" name="98" href="#98">98</a> <strong class="jxr_keyword">int</strong> nbOfCharsToFillBuf = BYTE_BLOCK_LENGTH - pos; |
| <a class="jxr_linenumber" name="99" href="#99">99</a> <strong class="jxr_keyword">int</strong> blkStart = 0; |
| <a class="jxr_linenumber" name="100" href="#100">100</a> |
| <a class="jxr_linenumber" name="101" href="#101">101</a> msgLength += len; |
| <a class="jxr_linenumber" name="102" href="#102">102</a> |
| <a class="jxr_linenumber" name="103" href="#103">103</a> <em class="jxr_comment">// Process each full block</em> |
| <a class="jxr_linenumber" name="104" href="#104">104</a> <strong class="jxr_keyword">if</strong> (len >= nbOfCharsToFillBuf) { |
| <a class="jxr_linenumber" name="105" href="#105">105</a> System.arraycopy(b, offset, buffer, pos, nbOfCharsToFillBuf); |
| <a class="jxr_linenumber" name="106" href="#106">106</a> process(buffer, 0); |
| <a class="jxr_linenumber" name="107" href="#107">107</a> <strong class="jxr_keyword">for</strong> (blkStart = nbOfCharsToFillBuf; blkStart + BYTE_BLOCK_LENGTH |
| <a class="jxr_linenumber" name="108" href="#108">108</a> - 1 < len; blkStart += BYTE_BLOCK_LENGTH) { |
| <a class="jxr_linenumber" name="109" href="#109">109</a> process(b, offset + blkStart); |
| <a class="jxr_linenumber" name="110" href="#110">110</a> } |
| <a class="jxr_linenumber" name="111" href="#111">111</a> pos = 0; |
| <a class="jxr_linenumber" name="112" href="#112">112</a> } |
| <a class="jxr_linenumber" name="113" href="#113">113</a> |
| <a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_comment">// Fill buffer with the remaining data</em> |
| <a class="jxr_linenumber" name="115" href="#115">115</a> <strong class="jxr_keyword">if</strong> (blkStart < len) { |
| <a class="jxr_linenumber" name="116" href="#116">116</a> System.arraycopy(b, offset + blkStart, buffer, pos, len - blkStart); |
| <a class="jxr_linenumber" name="117" href="#117">117</a> } |
| <a class="jxr_linenumber" name="118" href="#118">118</a> } |
| <a class="jxr_linenumber" name="119" href="#119">119</a> |
| <a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em> |
| <a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="123" href="#123">123</a> <strong class="jxr_keyword">protected</strong> byte[] engineDigest() { |
| <a class="jxr_linenumber" name="124" href="#124">124</a> byte[] p = pad(); |
| <a class="jxr_linenumber" name="125" href="#125">125</a> engineUpdate(p, 0, p.length); |
| <a class="jxr_linenumber" name="126" href="#126">126</a> byte[] digest = { (byte) a, (byte) (a >>> 8), (byte) (a >>> 16), |
| <a class="jxr_linenumber" name="127" href="#127">127</a> (byte) (a >>> 24), (byte) b, (byte) (b >>> 8), |
| <a class="jxr_linenumber" name="128" href="#128">128</a> (byte) (b >>> 16), (byte) (b >>> 24), (byte) c, |
| <a class="jxr_linenumber" name="129" href="#129">129</a> (byte) (c >>> 8), (byte) (c >>> 16), (byte) (c >>> 24), |
| <a class="jxr_linenumber" name="130" href="#130">130</a> (byte) d, (byte) (d >>> 8), (byte) (d >>> 16), |
| <a class="jxr_linenumber" name="131" href="#131">131</a> (byte) (d >>> 24) }; |
| <a class="jxr_linenumber" name="132" href="#132">132</a> |
| <a class="jxr_linenumber" name="133" href="#133">133</a> engineReset(); |
| <a class="jxr_linenumber" name="134" href="#134">134</a> |
| <a class="jxr_linenumber" name="135" href="#135">135</a> <strong class="jxr_keyword">return</strong> digest; |
| <a class="jxr_linenumber" name="136" href="#136">136</a> } |
| <a class="jxr_linenumber" name="137" href="#137">137</a> |
| <a class="jxr_linenumber" name="138" href="#138">138</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="139" href="#139">139</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em> |
| <a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="141" href="#141">141</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">int</strong> engineDigest(byte[] buf, <strong class="jxr_keyword">int</strong> offset, <strong class="jxr_keyword">int</strong> len) |
| <a class="jxr_linenumber" name="142" href="#142">142</a> <strong class="jxr_keyword">throws</strong> DigestException { |
| <a class="jxr_linenumber" name="143" href="#143">143</a> <strong class="jxr_keyword">if</strong> (offset < 0 || offset + len >= buf.length) { |
| <a class="jxr_linenumber" name="144" href="#144">144</a> <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> DigestException( |
| <a class="jxr_linenumber" name="145" href="#145">145</a> <span class="jxr_string">"Wrong offset or not enough space to store the digest"</span>); |
| <a class="jxr_linenumber" name="146" href="#146">146</a> } |
| <a class="jxr_linenumber" name="147" href="#147">147</a> <strong class="jxr_keyword">int</strong> destLength = Math.min(len, BYTE_DIGEST_LENGTH); |
| <a class="jxr_linenumber" name="148" href="#148">148</a> System.arraycopy(engineDigest(), 0, buf, offset, destLength); |
| <a class="jxr_linenumber" name="149" href="#149">149</a> <strong class="jxr_keyword">return</strong> destLength; |
| <a class="jxr_linenumber" name="150" href="#150">150</a> } |
| <a class="jxr_linenumber" name="151" href="#151">151</a> |
| <a class="jxr_linenumber" name="152" href="#152">152</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="153" href="#153">153</a> <em class="jxr_javadoccomment"> * {@inheritDoc}</em> |
| <a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> engineReset() { |
| <a class="jxr_linenumber" name="156" href="#156">156</a> a = A; |
| <a class="jxr_linenumber" name="157" href="#157">157</a> b = B; |
| <a class="jxr_linenumber" name="158" href="#158">158</a> c = C; |
| <a class="jxr_linenumber" name="159" href="#159">159</a> d = D; |
| <a class="jxr_linenumber" name="160" href="#160">160</a> msgLength = 0; |
| <a class="jxr_linenumber" name="161" href="#161">161</a> } |
| <a class="jxr_linenumber" name="162" href="#162">162</a> |
| <a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_javadoccomment">/**</em> |
| <a class="jxr_linenumber" name="164" href="#164">164</a> <em class="jxr_javadoccomment"> * Pads the buffer by appending the byte 0x80, then append as many zero </em> |
| <a class="jxr_linenumber" name="165" href="#165">165</a> <em class="jxr_javadoccomment"> * bytes as necessary to make the buffer length a multiple of 64 bytes. </em> |
| <a class="jxr_linenumber" name="166" href="#166">166</a> <em class="jxr_javadoccomment"> * The last 8 bytes will be filled with the length of the buffer in bits.</em> |
| <a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_javadoccomment"> * If there's no room to store the length in bits in the block i.e the block </em> |
| <a class="jxr_linenumber" name="168" href="#168">168</a> <em class="jxr_javadoccomment"> * is larger than 56 bytes then an additionnal 64-bytes block is appended.</em> |
| <a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_javadoccomment"> * </em> |
| <a class="jxr_linenumber" name="170" href="#170">170</a> <em class="jxr_javadoccomment"> * @see sections 3.1 & 3.2 of the RFC 1320.</em> |
| <a class="jxr_linenumber" name="171" href="#171">171</a> <em class="jxr_javadoccomment"> * </em> |
| <a class="jxr_linenumber" name="172" href="#172">172</a> <em class="jxr_javadoccomment"> * @return the pad byte array</em> |
| <a class="jxr_linenumber" name="173" href="#173">173</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="174" href="#174">174</a> <strong class="jxr_keyword">private</strong> byte[] pad() { |
| <a class="jxr_linenumber" name="175" href="#175">175</a> <strong class="jxr_keyword">int</strong> pos = (<strong class="jxr_keyword">int</strong>) (msgLength % BYTE_BLOCK_LENGTH); |
| <a class="jxr_linenumber" name="176" href="#176">176</a> <strong class="jxr_keyword">int</strong> padLength = (pos < 56) ? (64 - pos) : (128 - pos); |
| <a class="jxr_linenumber" name="177" href="#177">177</a> byte[] pad = <strong class="jxr_keyword">new</strong> byte[padLength]; |
| <a class="jxr_linenumber" name="178" href="#178">178</a> |
| <a class="jxr_linenumber" name="179" href="#179">179</a> <em class="jxr_comment">// First bit of the padding set to 1</em> |
| <a class="jxr_linenumber" name="180" href="#180">180</a> pad[0] = (byte) 0x80; |
| <a class="jxr_linenumber" name="181" href="#181">181</a> |
| <a class="jxr_linenumber" name="182" href="#182">182</a> <strong class="jxr_keyword">long</strong> bits = msgLength << 3; |
| <a class="jxr_linenumber" name="183" href="#183">183</a> <strong class="jxr_keyword">int</strong> index = padLength - 8; |
| <a class="jxr_linenumber" name="184" href="#184">184</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < 8; i++) { |
| <a class="jxr_linenumber" name="185" href="#185">185</a> pad[index++] = (byte) (bits >>> (i << 3)); |
| <a class="jxr_linenumber" name="186" href="#186">186</a> } |
| <a class="jxr_linenumber" name="187" href="#187">187</a> |
| <a class="jxr_linenumber" name="188" href="#188">188</a> <strong class="jxr_keyword">return</strong> pad; |
| <a class="jxr_linenumber" name="189" href="#189">189</a> } |
| <a class="jxr_linenumber" name="190" href="#190">190</a> |
| <a class="jxr_linenumber" name="191" href="#191">191</a> <em class="jxr_javadoccomment">/**</em><em class="jxr_javadoccomment"> </em> |
| <a class="jxr_linenumber" name="192" href="#192">192</a> <em class="jxr_javadoccomment"> * Process one 64-byte block. Algorithm is constituted by three rounds.</em> |
| <a class="jxr_linenumber" name="193" href="#193">193</a> <em class="jxr_javadoccomment"> * Note that F, G and H functions were inlined for improved performance.</em> |
| <a class="jxr_linenumber" name="194" href="#194">194</a> <em class="jxr_javadoccomment"> * </em> |
| <a class="jxr_linenumber" name="195" href="#195">195</a> <em class="jxr_javadoccomment"> * @param in the byte array to process</em> |
| <a class="jxr_linenumber" name="196" href="#196">196</a> <em class="jxr_javadoccomment"> * @param offset the offset at which the 64-byte block is stored</em> |
| <a class="jxr_linenumber" name="197" href="#197">197</a> <em class="jxr_javadoccomment"> */</em> |
| <a class="jxr_linenumber" name="198" href="#198">198</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> process(byte[] in, <strong class="jxr_keyword">int</strong> offset) { |
| <a class="jxr_linenumber" name="199" href="#199">199</a> <em class="jxr_comment">// Save previous state.</em> |
| <a class="jxr_linenumber" name="200" href="#200">200</a> <strong class="jxr_keyword">int</strong> aa = a; |
| <a class="jxr_linenumber" name="201" href="#201">201</a> <strong class="jxr_keyword">int</strong> bb = b; |
| <a class="jxr_linenumber" name="202" href="#202">202</a> <strong class="jxr_keyword">int</strong> cc = c; |
| <a class="jxr_linenumber" name="203" href="#203">203</a> <strong class="jxr_keyword">int</strong> dd = d; |
| <a class="jxr_linenumber" name="204" href="#204">204</a> |
| <a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_comment">// Copy the block to process into X array</em> |
| <a class="jxr_linenumber" name="206" href="#206">206</a> <strong class="jxr_keyword">int</strong>[] X = <strong class="jxr_keyword">new</strong> <strong class="jxr_keyword">int</strong>[16]; |
| <a class="jxr_linenumber" name="207" href="#207">207</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < 16; i++) { |
| <a class="jxr_linenumber" name="208" href="#208">208</a> X[i] = (in[offset++] & 0xff) | (in[offset++] & 0xff) << 8 |
| <a class="jxr_linenumber" name="209" href="#209">209</a> | (in[offset++] & 0xff) << 16 | (in[offset++] & 0xff) << 24; |
| <a class="jxr_linenumber" name="210" href="#210">210</a> } |
| <a class="jxr_linenumber" name="211" href="#211">211</a> |
| <a class="jxr_linenumber" name="212" href="#212">212</a> <em class="jxr_comment">// Round 1</em> |
| <a class="jxr_linenumber" name="213" href="#213">213</a> a += ((b & c) | (~b & d)) + X[0]; |
| <a class="jxr_linenumber" name="214" href="#214">214</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="215" href="#215">215</a> d += ((a & b) | (~a & c)) + X[1]; |
| <a class="jxr_linenumber" name="216" href="#216">216</a> d = d << 7 | d >>> (32 - 7); |
| <a class="jxr_linenumber" name="217" href="#217">217</a> c += ((d & a) | (~d & b)) + X[2]; |
| <a class="jxr_linenumber" name="218" href="#218">218</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="219" href="#219">219</a> b += ((c & d) | (~c & a)) + X[3]; |
| <a class="jxr_linenumber" name="220" href="#220">220</a> b = b << 19 | b >>> (32 - 19); |
| <a class="jxr_linenumber" name="221" href="#221">221</a> a += ((b & c) | (~b & d)) + X[4]; |
| <a class="jxr_linenumber" name="222" href="#222">222</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="223" href="#223">223</a> d += ((a & b) | (~a & c)) + X[5]; |
| <a class="jxr_linenumber" name="224" href="#224">224</a> d = d << 7 | d >>> (32 - 7); |
| <a class="jxr_linenumber" name="225" href="#225">225</a> c += ((d & a) | (~d & b)) + X[6]; |
| <a class="jxr_linenumber" name="226" href="#226">226</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="227" href="#227">227</a> b += ((c & d) | (~c & a)) + X[7]; |
| <a class="jxr_linenumber" name="228" href="#228">228</a> b = b << 19 | b >>> (32 - 19); |
| <a class="jxr_linenumber" name="229" href="#229">229</a> a += ((b & c) | (~b & d)) + X[8]; |
| <a class="jxr_linenumber" name="230" href="#230">230</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="231" href="#231">231</a> d += ((a & b) | (~a & c)) + X[9]; |
| <a class="jxr_linenumber" name="232" href="#232">232</a> d = d << 7 | d >>> (32 - 7); |
| <a class="jxr_linenumber" name="233" href="#233">233</a> c += ((d & a) | (~d & b)) + X[10]; |
| <a class="jxr_linenumber" name="234" href="#234">234</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="235" href="#235">235</a> b += ((c & d) | (~c & a)) + X[11]; |
| <a class="jxr_linenumber" name="236" href="#236">236</a> b = b << 19 | b >>> (32 - 19); |
| <a class="jxr_linenumber" name="237" href="#237">237</a> a += ((b & c) | (~b & d)) + X[12]; |
| <a class="jxr_linenumber" name="238" href="#238">238</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="239" href="#239">239</a> d += ((a & b) | (~a & c)) + X[13]; |
| <a class="jxr_linenumber" name="240" href="#240">240</a> d = d << 7 | d >>> (32 - 7); |
| <a class="jxr_linenumber" name="241" href="#241">241</a> c += ((d & a) | (~d & b)) + X[14]; |
| <a class="jxr_linenumber" name="242" href="#242">242</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="243" href="#243">243</a> b += ((c & d) | (~c & a)) + X[15]; |
| <a class="jxr_linenumber" name="244" href="#244">244</a> b = b << 19 | b >>> (32 - 19); |
| <a class="jxr_linenumber" name="245" href="#245">245</a> |
| <a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_comment">// Round 2</em> |
| <a class="jxr_linenumber" name="247" href="#247">247</a> a += ((b & (c | d)) | (c & d)) + X[0] + 0x5a827999; |
| <a class="jxr_linenumber" name="248" href="#248">248</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="249" href="#249">249</a> d += ((a & (b | c)) | (b & c)) + X[4] + 0x5a827999; |
| <a class="jxr_linenumber" name="250" href="#250">250</a> d = d << 5 | d >>> (32 - 5); |
| <a class="jxr_linenumber" name="251" href="#251">251</a> c += ((d & (a | b)) | (a & b)) + X[8] + 0x5a827999; |
| <a class="jxr_linenumber" name="252" href="#252">252</a> c = c << 9 | c >>> (32 - 9); |
| <a class="jxr_linenumber" name="253" href="#253">253</a> b += ((c & (d | a)) | (d & a)) + X[12] + 0x5a827999; |
| <a class="jxr_linenumber" name="254" href="#254">254</a> b = b << 13 | b >>> (32 - 13); |
| <a class="jxr_linenumber" name="255" href="#255">255</a> a += ((b & (c | d)) | (c & d)) + X[1] + 0x5a827999; |
| <a class="jxr_linenumber" name="256" href="#256">256</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="257" href="#257">257</a> d += ((a & (b | c)) | (b & c)) + X[5] + 0x5a827999; |
| <a class="jxr_linenumber" name="258" href="#258">258</a> d = d << 5 | d >>> (32 - 5); |
| <a class="jxr_linenumber" name="259" href="#259">259</a> c += ((d & (a | b)) | (a & b)) + X[9] + 0x5a827999; |
| <a class="jxr_linenumber" name="260" href="#260">260</a> c = c << 9 | c >>> (32 - 9); |
| <a class="jxr_linenumber" name="261" href="#261">261</a> b += ((c & (d | a)) | (d & a)) + X[13] + 0x5a827999; |
| <a class="jxr_linenumber" name="262" href="#262">262</a> b = b << 13 | b >>> (32 - 13); |
| <a class="jxr_linenumber" name="263" href="#263">263</a> a += ((b & (c | d)) | (c & d)) + X[2] + 0x5a827999; |
| <a class="jxr_linenumber" name="264" href="#264">264</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="265" href="#265">265</a> d += ((a & (b | c)) | (b & c)) + X[6] + 0x5a827999; |
| <a class="jxr_linenumber" name="266" href="#266">266</a> d = d << 5 | d >>> (32 - 5); |
| <a class="jxr_linenumber" name="267" href="#267">267</a> c += ((d & (a | b)) | (a & b)) + X[10] + 0x5a827999; |
| <a class="jxr_linenumber" name="268" href="#268">268</a> c = c << 9 | c >>> (32 - 9); |
| <a class="jxr_linenumber" name="269" href="#269">269</a> b += ((c & (d | a)) | (d & a)) + X[14] + 0x5a827999; |
| <a class="jxr_linenumber" name="270" href="#270">270</a> b = b << 13 | b >>> (32 - 13); |
| <a class="jxr_linenumber" name="271" href="#271">271</a> a += ((b & (c | d)) | (c & d)) + X[3] + 0x5a827999; |
| <a class="jxr_linenumber" name="272" href="#272">272</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="273" href="#273">273</a> d += ((a & (b | c)) | (b & c)) + X[7] + 0x5a827999; |
| <a class="jxr_linenumber" name="274" href="#274">274</a> d = d << 5 | d >>> (32 - 5); |
| <a class="jxr_linenumber" name="275" href="#275">275</a> c += ((d & (a | b)) | (a & b)) + X[11] + 0x5a827999; |
| <a class="jxr_linenumber" name="276" href="#276">276</a> c = c << 9 | c >>> (32 - 9); |
| <a class="jxr_linenumber" name="277" href="#277">277</a> b += ((c & (d | a)) | (d & a)) + X[15] + 0x5a827999; |
| <a class="jxr_linenumber" name="278" href="#278">278</a> b = b << 13 | b >>> (32 - 13); |
| <a class="jxr_linenumber" name="279" href="#279">279</a> |
| <a class="jxr_linenumber" name="280" href="#280">280</a> <em class="jxr_comment">// Round 3</em> |
| <a class="jxr_linenumber" name="281" href="#281">281</a> a += (b ^ c ^ d) + X[0] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="282" href="#282">282</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="283" href="#283">283</a> d += (a ^ b ^ c) + X[8] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="284" href="#284">284</a> d = d << 9 | d >>> (32 - 9); |
| <a class="jxr_linenumber" name="285" href="#285">285</a> c += (d ^ a ^ b) + X[4] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="286" href="#286">286</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="287" href="#287">287</a> b += (c ^ d ^ a) + X[12] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="288" href="#288">288</a> b = b << 15 | b >>> (32 - 15); |
| <a class="jxr_linenumber" name="289" href="#289">289</a> a += (b ^ c ^ d) + X[2] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="290" href="#290">290</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="291" href="#291">291</a> d += (a ^ b ^ c) + X[10] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="292" href="#292">292</a> d = d << 9 | d >>> (32 - 9); |
| <a class="jxr_linenumber" name="293" href="#293">293</a> c += (d ^ a ^ b) + X[6] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="294" href="#294">294</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="295" href="#295">295</a> b += (c ^ d ^ a) + X[14] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="296" href="#296">296</a> b = b << 15 | b >>> (32 - 15); |
| <a class="jxr_linenumber" name="297" href="#297">297</a> a += (b ^ c ^ d) + X[1] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="298" href="#298">298</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="299" href="#299">299</a> d += (a ^ b ^ c) + X[9] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="300" href="#300">300</a> d = d << 9 | d >>> (32 - 9); |
| <a class="jxr_linenumber" name="301" href="#301">301</a> c += (d ^ a ^ b) + X[5] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="302" href="#302">302</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="303" href="#303">303</a> b += (c ^ d ^ a) + X[13] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="304" href="#304">304</a> b = b << 15 | b >>> (32 - 15); |
| <a class="jxr_linenumber" name="305" href="#305">305</a> a += (b ^ c ^ d) + X[3] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="306" href="#306">306</a> a = a << 3 | a >>> (32 - 3); |
| <a class="jxr_linenumber" name="307" href="#307">307</a> d += (a ^ b ^ c) + X[11] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="308" href="#308">308</a> d = d << 9 | d >>> (32 - 9); |
| <a class="jxr_linenumber" name="309" href="#309">309</a> c += (d ^ a ^ b) + X[7] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="310" href="#310">310</a> c = c << 11 | c >>> (32 - 11); |
| <a class="jxr_linenumber" name="311" href="#311">311</a> b += (c ^ d ^ a) + X[15] + 0x6ed9eba1; |
| <a class="jxr_linenumber" name="312" href="#312">312</a> b = b << 15 | b >>> (32 - 15); |
| <a class="jxr_linenumber" name="313" href="#313">313</a> |
| <a class="jxr_linenumber" name="314" href="#314">314</a> <em class="jxr_comment">//Update state.</em> |
| <a class="jxr_linenumber" name="315" href="#315">315</a> a += aa; |
| <a class="jxr_linenumber" name="316" href="#316">316</a> b += bb; |
| <a class="jxr_linenumber" name="317" href="#317">317</a> c += cc; |
| <a class="jxr_linenumber" name="318" href="#318">318</a> d += dd; |
| <a class="jxr_linenumber" name="319" href="#319">319</a> } |
| <a class="jxr_linenumber" name="320" href="#320">320</a> } |
| </pre> |
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