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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.regionserver.wal;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.ByteArrayInputStream;</span> |
| <span class="source-line-no">021</span><span id="line-21">import java.io.ByteArrayOutputStream;</span> |
| <span class="source-line-no">022</span><span id="line-22">import java.io.IOException;</span> |
| <span class="source-line-no">023</span><span id="line-23">import java.io.InputStream;</span> |
| <span class="source-line-no">024</span><span id="line-24">import java.io.OutputStream;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.commons.io.IOUtils;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.ExtendedCell;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.KeyValue;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.KeyValueUtil;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.codec.KeyValueCodecWithTags;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.io.ByteBufferWriterOutputStream;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.io.crypto.Decryptor;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.io.crypto.Encryption;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.io.crypto.Encryptor;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.io.util.StreamUtils;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.util.Bytes;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">039</span><span id="line-39"></span> |
| <span class="source-line-no">040</span><span id="line-40">/**</span> |
| <span class="source-line-no">041</span><span id="line-41"> * A WALCellCodec that encrypts the WALedits.</span> |
| <span class="source-line-no">042</span><span id="line-42"> */</span> |
| <span class="source-line-no">043</span><span id="line-43">@InterfaceAudience.Private</span> |
| <span class="source-line-no">044</span><span id="line-44">public class SecureWALCellCodec extends WALCellCodec {</span> |
| <span class="source-line-no">045</span><span id="line-45"></span> |
| <span class="source-line-no">046</span><span id="line-46"> private Encryptor encryptor;</span> |
| <span class="source-line-no">047</span><span id="line-47"> private Decryptor decryptor;</span> |
| <span class="source-line-no">048</span><span id="line-48"></span> |
| <span class="source-line-no">049</span><span id="line-49"> public SecureWALCellCodec(Configuration conf, CompressionContext compression) {</span> |
| <span class="source-line-no">050</span><span id="line-50"> super(conf, compression);</span> |
| <span class="source-line-no">051</span><span id="line-51"> }</span> |
| <span class="source-line-no">052</span><span id="line-52"></span> |
| <span class="source-line-no">053</span><span id="line-53"> public SecureWALCellCodec(Configuration conf, Encryptor encryptor) {</span> |
| <span class="source-line-no">054</span><span id="line-54"> super(conf, null);</span> |
| <span class="source-line-no">055</span><span id="line-55"> this.encryptor = encryptor;</span> |
| <span class="source-line-no">056</span><span id="line-56"> }</span> |
| <span class="source-line-no">057</span><span id="line-57"></span> |
| <span class="source-line-no">058</span><span id="line-58"> public SecureWALCellCodec(Configuration conf, Decryptor decryptor) {</span> |
| <span class="source-line-no">059</span><span id="line-59"> super(conf, null);</span> |
| <span class="source-line-no">060</span><span id="line-60"> this.decryptor = decryptor;</span> |
| <span class="source-line-no">061</span><span id="line-61"> }</span> |
| <span class="source-line-no">062</span><span id="line-62"></span> |
| <span class="source-line-no">063</span><span id="line-63"> static class EncryptedKvDecoder extends KeyValueCodecWithTags.KeyValueDecoder {</span> |
| <span class="source-line-no">064</span><span id="line-64"></span> |
| <span class="source-line-no">065</span><span id="line-65"> private Decryptor decryptor;</span> |
| <span class="source-line-no">066</span><span id="line-66"> private byte[] iv;</span> |
| <span class="source-line-no">067</span><span id="line-67"></span> |
| <span class="source-line-no">068</span><span id="line-68"> public EncryptedKvDecoder(InputStream in) {</span> |
| <span class="source-line-no">069</span><span id="line-69"> super(in);</span> |
| <span class="source-line-no">070</span><span id="line-70"> }</span> |
| <span class="source-line-no">071</span><span id="line-71"></span> |
| <span class="source-line-no">072</span><span id="line-72"> public EncryptedKvDecoder(InputStream in, Decryptor decryptor) {</span> |
| <span class="source-line-no">073</span><span id="line-73"> super(in);</span> |
| <span class="source-line-no">074</span><span id="line-74"> this.decryptor = decryptor;</span> |
| <span class="source-line-no">075</span><span id="line-75"> if (decryptor != null) {</span> |
| <span class="source-line-no">076</span><span id="line-76"> this.iv = new byte[decryptor.getIvLength()];</span> |
| <span class="source-line-no">077</span><span id="line-77"> }</span> |
| <span class="source-line-no">078</span><span id="line-78"> }</span> |
| <span class="source-line-no">079</span><span id="line-79"></span> |
| <span class="source-line-no">080</span><span id="line-80"> @Override</span> |
| <span class="source-line-no">081</span><span id="line-81"> protected ExtendedCell parseCell() throws IOException {</span> |
| <span class="source-line-no">082</span><span id="line-82"> if (this.decryptor == null) {</span> |
| <span class="source-line-no">083</span><span id="line-83"> return super.parseCell();</span> |
| <span class="source-line-no">084</span><span id="line-84"> }</span> |
| <span class="source-line-no">085</span><span id="line-85"> int ivLength = 0;</span> |
| <span class="source-line-no">086</span><span id="line-86"></span> |
| <span class="source-line-no">087</span><span id="line-87"> ivLength = StreamUtils.readRawVarint32(in);</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> // TODO: An IV length of 0 could signify an unwrapped cell, when the</span> |
| <span class="source-line-no">090</span><span id="line-90"> // encoder supports that just read the remainder in directly</span> |
| <span class="source-line-no">091</span><span id="line-91"></span> |
| <span class="source-line-no">092</span><span id="line-92"> if (ivLength != this.iv.length) {</span> |
| <span class="source-line-no">093</span><span id="line-93"> throw new IOException("Incorrect IV length: expected=" + iv.length + " have=" + ivLength);</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"> IOUtils.readFully(in, this.iv);</span> |
| <span class="source-line-no">096</span><span id="line-96"></span> |
| <span class="source-line-no">097</span><span id="line-97"> int codedLength = StreamUtils.readRawVarint32(in);</span> |
| <span class="source-line-no">098</span><span id="line-98"> byte[] codedBytes = new byte[codedLength];</span> |
| <span class="source-line-no">099</span><span id="line-99"> IOUtils.readFully(in, codedBytes);</span> |
| <span class="source-line-no">100</span><span id="line-100"></span> |
| <span class="source-line-no">101</span><span id="line-101"> decryptor.setIv(iv);</span> |
| <span class="source-line-no">102</span><span id="line-102"> decryptor.reset();</span> |
| <span class="source-line-no">103</span><span id="line-103"></span> |
| <span class="source-line-no">104</span><span id="line-104"> InputStream cin = decryptor.createDecryptionStream(new ByteArrayInputStream(codedBytes));</span> |
| <span class="source-line-no">105</span><span id="line-105"></span> |
| <span class="source-line-no">106</span><span id="line-106"> // TODO: Add support for WAL compression</span> |
| <span class="source-line-no">107</span><span id="line-107"></span> |
| <span class="source-line-no">108</span><span id="line-108"> int keylength = StreamUtils.readRawVarint32(cin);</span> |
| <span class="source-line-no">109</span><span id="line-109"> int vlength = StreamUtils.readRawVarint32(cin);</span> |
| <span class="source-line-no">110</span><span id="line-110"> int tagsLength = StreamUtils.readRawVarint32(cin);</span> |
| <span class="source-line-no">111</span><span id="line-111"> int length = 0;</span> |
| <span class="source-line-no">112</span><span id="line-112"> if (tagsLength == 0) {</span> |
| <span class="source-line-no">113</span><span id="line-113"> length = KeyValue.KEYVALUE_INFRASTRUCTURE_SIZE + keylength + vlength;</span> |
| <span class="source-line-no">114</span><span id="line-114"> } else {</span> |
| <span class="source-line-no">115</span><span id="line-115"> length = KeyValue.KEYVALUE_WITH_TAGS_INFRASTRUCTURE_SIZE + keylength + vlength + tagsLength;</span> |
| <span class="source-line-no">116</span><span id="line-116"> }</span> |
| <span class="source-line-no">117</span><span id="line-117"></span> |
| <span class="source-line-no">118</span><span id="line-118"> byte[] backingArray = new byte[length];</span> |
| <span class="source-line-no">119</span><span id="line-119"> int pos = 0;</span> |
| <span class="source-line-no">120</span><span id="line-120"> pos = Bytes.putInt(backingArray, pos, keylength);</span> |
| <span class="source-line-no">121</span><span id="line-121"> pos = Bytes.putInt(backingArray, pos, vlength);</span> |
| <span class="source-line-no">122</span><span id="line-122"></span> |
| <span class="source-line-no">123</span><span id="line-123"> // Row</span> |
| <span class="source-line-no">124</span><span id="line-124"> int elemLen = StreamUtils.readRawVarint32(cin);</span> |
| <span class="source-line-no">125</span><span id="line-125"> pos = Bytes.putShort(backingArray, pos, (short) elemLen);</span> |
| <span class="source-line-no">126</span><span id="line-126"> IOUtils.readFully(cin, backingArray, pos, elemLen);</span> |
| <span class="source-line-no">127</span><span id="line-127"> pos += elemLen;</span> |
| <span class="source-line-no">128</span><span id="line-128"> // Family</span> |
| <span class="source-line-no">129</span><span id="line-129"> elemLen = StreamUtils.readRawVarint32(cin);</span> |
| <span class="source-line-no">130</span><span id="line-130"> pos = Bytes.putByte(backingArray, pos, (byte) elemLen);</span> |
| <span class="source-line-no">131</span><span id="line-131"> IOUtils.readFully(cin, backingArray, pos, elemLen);</span> |
| <span class="source-line-no">132</span><span id="line-132"> pos += elemLen;</span> |
| <span class="source-line-no">133</span><span id="line-133"> // Qualifier</span> |
| <span class="source-line-no">134</span><span id="line-134"> elemLen = StreamUtils.readRawVarint32(cin);</span> |
| <span class="source-line-no">135</span><span id="line-135"> IOUtils.readFully(cin, backingArray, pos, elemLen);</span> |
| <span class="source-line-no">136</span><span id="line-136"> pos += elemLen;</span> |
| <span class="source-line-no">137</span><span id="line-137"> // Remainder</span> |
| <span class="source-line-no">138</span><span id="line-138"> IOUtils.readFully(cin, backingArray, pos, length - pos);</span> |
| <span class="source-line-no">139</span><span id="line-139"> return new KeyValue(backingArray, 0, length);</span> |
| <span class="source-line-no">140</span><span id="line-140"> }</span> |
| <span class="source-line-no">141</span><span id="line-141"></span> |
| <span class="source-line-no">142</span><span id="line-142"> }</span> |
| <span class="source-line-no">143</span><span id="line-143"></span> |
| <span class="source-line-no">144</span><span id="line-144"> static class EncryptedKvEncoder extends KeyValueCodecWithTags.KeyValueEncoder {</span> |
| <span class="source-line-no">145</span><span id="line-145"></span> |
| <span class="source-line-no">146</span><span id="line-146"> private Encryptor encryptor;</span> |
| <span class="source-line-no">147</span><span id="line-147"> private final ThreadLocal<byte[]> iv = new ThreadLocal<byte[]>() {</span> |
| <span class="source-line-no">148</span><span id="line-148"> @Override</span> |
| <span class="source-line-no">149</span><span id="line-149"> protected byte[] initialValue() {</span> |
| <span class="source-line-no">150</span><span id="line-150"> byte[] iv = new byte[encryptor.getIvLength()];</span> |
| <span class="source-line-no">151</span><span id="line-151"> Bytes.secureRandom(iv);</span> |
| <span class="source-line-no">152</span><span id="line-152"> return iv;</span> |
| <span class="source-line-no">153</span><span id="line-153"> }</span> |
| <span class="source-line-no">154</span><span id="line-154"> };</span> |
| <span class="source-line-no">155</span><span id="line-155"></span> |
| <span class="source-line-no">156</span><span id="line-156"> protected byte[] nextIv() {</span> |
| <span class="source-line-no">157</span><span id="line-157"> byte[] b = iv.get(), ret = new byte[b.length];</span> |
| <span class="source-line-no">158</span><span id="line-158"> System.arraycopy(b, 0, ret, 0, b.length);</span> |
| <span class="source-line-no">159</span><span id="line-159"> return ret;</span> |
| <span class="source-line-no">160</span><span id="line-160"> }</span> |
| <span class="source-line-no">161</span><span id="line-161"></span> |
| <span class="source-line-no">162</span><span id="line-162"> protected void incrementIv(int v) {</span> |
| <span class="source-line-no">163</span><span id="line-163"> Encryption.incrementIv(iv.get(), 1 + (v / encryptor.getBlockSize()));</span> |
| <span class="source-line-no">164</span><span id="line-164"> }</span> |
| <span class="source-line-no">165</span><span id="line-165"></span> |
| <span class="source-line-no">166</span><span id="line-166"> public EncryptedKvEncoder(OutputStream os) {</span> |
| <span class="source-line-no">167</span><span id="line-167"> super(os);</span> |
| <span class="source-line-no">168</span><span id="line-168"> }</span> |
| <span class="source-line-no">169</span><span id="line-169"></span> |
| <span class="source-line-no">170</span><span id="line-170"> public EncryptedKvEncoder(OutputStream os, Encryptor encryptor) {</span> |
| <span class="source-line-no">171</span><span id="line-171"> super(os);</span> |
| <span class="source-line-no">172</span><span id="line-172"> this.encryptor = encryptor;</span> |
| <span class="source-line-no">173</span><span id="line-173"> }</span> |
| <span class="source-line-no">174</span><span id="line-174"></span> |
| <span class="source-line-no">175</span><span id="line-175"> @Override</span> |
| <span class="source-line-no">176</span><span id="line-176"> public void write(ExtendedCell cell) throws IOException {</span> |
| <span class="source-line-no">177</span><span id="line-177"> if (encryptor == null) {</span> |
| <span class="source-line-no">178</span><span id="line-178"> super.write(cell);</span> |
| <span class="source-line-no">179</span><span id="line-179"> return;</span> |
| <span class="source-line-no">180</span><span id="line-180"> }</span> |
| <span class="source-line-no">181</span><span id="line-181"></span> |
| <span class="source-line-no">182</span><span id="line-182"> byte[] iv = nextIv();</span> |
| <span class="source-line-no">183</span><span id="line-183"> encryptor.setIv(iv);</span> |
| <span class="source-line-no">184</span><span id="line-184"> encryptor.reset();</span> |
| <span class="source-line-no">185</span><span id="line-185"></span> |
| <span class="source-line-no">186</span><span id="line-186"> // TODO: Check if this is a cell for an encrypted CF. If not, we can</span> |
| <span class="source-line-no">187</span><span id="line-187"> // write a 0 here to signal an unwrapped cell and just dump the KV bytes</span> |
| <span class="source-line-no">188</span><span id="line-188"> // afterward</span> |
| <span class="source-line-no">189</span><span id="line-189"></span> |
| <span class="source-line-no">190</span><span id="line-190"> StreamUtils.writeRawVInt32(out, iv.length);</span> |
| <span class="source-line-no">191</span><span id="line-191"> out.write(iv);</span> |
| <span class="source-line-no">192</span><span id="line-192"></span> |
| <span class="source-line-no">193</span><span id="line-193"> // TODO: Add support for WAL compression</span> |
| <span class="source-line-no">194</span><span id="line-194"></span> |
| <span class="source-line-no">195</span><span id="line-195"> ByteArrayOutputStream baos = new ByteArrayOutputStream();</span> |
| <span class="source-line-no">196</span><span id="line-196"> OutputStream cout = encryptor.createEncryptionStream(baos);</span> |
| <span class="source-line-no">197</span><span id="line-197"> ByteBufferWriterOutputStream bos = new ByteBufferWriterOutputStream(cout);</span> |
| <span class="source-line-no">198</span><span id="line-198"> int tlen = cell.getTagsLength();</span> |
| <span class="source-line-no">199</span><span id="line-199"> // Write the KeyValue infrastructure as VInts.</span> |
| <span class="source-line-no">200</span><span id="line-200"> StreamUtils.writeRawVInt32(bos, KeyValueUtil.keyLength(cell));</span> |
| <span class="source-line-no">201</span><span id="line-201"> StreamUtils.writeRawVInt32(bos, cell.getValueLength());</span> |
| <span class="source-line-no">202</span><span id="line-202"> // To support tags</span> |
| <span class="source-line-no">203</span><span id="line-203"> StreamUtils.writeRawVInt32(bos, tlen);</span> |
| <span class="source-line-no">204</span><span id="line-204"></span> |
| <span class="source-line-no">205</span><span id="line-205"> // Write row, qualifier, and family</span> |
| <span class="source-line-no">206</span><span id="line-206"> short rowLength = cell.getRowLength();</span> |
| <span class="source-line-no">207</span><span id="line-207"> StreamUtils.writeRawVInt32(bos, rowLength);</span> |
| <span class="source-line-no">208</span><span id="line-208"> PrivateCellUtil.writeRow(bos, cell, rowLength);</span> |
| <span class="source-line-no">209</span><span id="line-209"> byte familyLength = cell.getFamilyLength();</span> |
| <span class="source-line-no">210</span><span id="line-210"> StreamUtils.writeRawVInt32(bos, familyLength);</span> |
| <span class="source-line-no">211</span><span id="line-211"> PrivateCellUtil.writeFamily(bos, cell, familyLength);</span> |
| <span class="source-line-no">212</span><span id="line-212"> int qualifierLength = cell.getQualifierLength();</span> |
| <span class="source-line-no">213</span><span id="line-213"> StreamUtils.writeRawVInt32(bos, qualifierLength);</span> |
| <span class="source-line-no">214</span><span id="line-214"> PrivateCellUtil.writeQualifier(bos, cell, qualifierLength);</span> |
| <span class="source-line-no">215</span><span id="line-215"> // Write the rest ie. ts, type, value and tags parts</span> |
| <span class="source-line-no">216</span><span id="line-216"> StreamUtils.writeLong(bos, cell.getTimestamp());</span> |
| <span class="source-line-no">217</span><span id="line-217"> bos.write(cell.getTypeByte());</span> |
| <span class="source-line-no">218</span><span id="line-218"> PrivateCellUtil.writeValue(bos, cell, cell.getValueLength());</span> |
| <span class="source-line-no">219</span><span id="line-219"> if (tlen > 0) {</span> |
| <span class="source-line-no">220</span><span id="line-220"> PrivateCellUtil.writeTags(bos, cell, tlen);</span> |
| <span class="source-line-no">221</span><span id="line-221"> }</span> |
| <span class="source-line-no">222</span><span id="line-222"> bos.close();</span> |
| <span class="source-line-no">223</span><span id="line-223"></span> |
| <span class="source-line-no">224</span><span id="line-224"> StreamUtils.writeRawVInt32(out, baos.size());</span> |
| <span class="source-line-no">225</span><span id="line-225"> baos.writeTo(out);</span> |
| <span class="source-line-no">226</span><span id="line-226"></span> |
| <span class="source-line-no">227</span><span id="line-227"> // Increment IV given the final payload length</span> |
| <span class="source-line-no">228</span><span id="line-228"> incrementIv(baos.size());</span> |
| <span class="source-line-no">229</span><span id="line-229"> }</span> |
| <span class="source-line-no">230</span><span id="line-230"></span> |
| <span class="source-line-no">231</span><span id="line-231"> }</span> |
| <span class="source-line-no">232</span><span id="line-232"></span> |
| <span class="source-line-no">233</span><span id="line-233"> @Override</span> |
| <span class="source-line-no">234</span><span id="line-234"> public Decoder getDecoder(InputStream is) {</span> |
| <span class="source-line-no">235</span><span id="line-235"> return new EncryptedKvDecoder(is, decryptor);</span> |
| <span class="source-line-no">236</span><span id="line-236"> }</span> |
| <span class="source-line-no">237</span><span id="line-237"></span> |
| <span class="source-line-no">238</span><span id="line-238"> @Override</span> |
| <span class="source-line-no">239</span><span id="line-239"> public Encoder getEncoder(OutputStream os) {</span> |
| <span class="source-line-no">240</span><span id="line-240"> return new EncryptedKvEncoder(os, encryptor);</span> |
| <span class="source-line-no">241</span><span id="line-241"> }</span> |
| <span class="source-line-no">242</span><span id="line-242"></span> |
| <span class="source-line-no">243</span><span id="line-243"> public static WALCellCodec getCodec(Configuration conf, Encryptor encryptor) {</span> |
| <span class="source-line-no">244</span><span id="line-244"> return new SecureWALCellCodec(conf, encryptor);</span> |
| <span class="source-line-no">245</span><span id="line-245"> }</span> |
| <span class="source-line-no">246</span><span id="line-246"></span> |
| <span class="source-line-no">247</span><span id="line-247"> public static WALCellCodec getCodec(Configuration conf, Decryptor decryptor) {</span> |
| <span class="source-line-no">248</span><span id="line-248"> return new SecureWALCellCodec(conf, decryptor);</span> |
| <span class="source-line-no">249</span><span id="line-249"> }</span> |
| <span class="source-line-no">250</span><span id="line-250"></span> |
| <span class="source-line-no">251</span><span id="line-251">}</span> |
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| </pre> |
| </div> |
| </main> |
| </body> |
| </html> |
