<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div style>There is a good implementation available on the AES Crypt website.</div><div style><br></div><div style>Java version overview</div>
<div style><a href="http://www.aescrypt.com/java_aes_crypt.html">http://www.aescrypt.com/java_aes_crypt.html</a></div><div style><br></div><div style>Download page</div><div style><a href="https://www.aescrypt.com/download/">https://www.aescrypt.com/download/</a></div>
<div style><br></div><div style>A lot of the code is designed around AES Crypt's file format, but as long as you evaluate that first, you should be able to get a good idea of how to set things up correctly.</div><div style>
<br></div><div style>Keep in mind that only 128-bit encryption is available with the standard Java lib, and AES Crypt is written for 256-bit encryption. So you will need to either adapt their work to a 128-bit key size, or (assuming no restrictions apply) download the<span style="background-color:rgba(255,255,255,0)"> "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files" from</span><span style="background-color:rgba(255,255,255,0)"> </span><a href="http://www.oracle.com/technetwork/java/javase/downloads/index.html" style="text-decoration:none">Oracle</a><span style="background-color:rgba(255,255,255,0)">.</span></div>
<div><div style><br></div><div style>Let me know if you have additional questions. You may contact me directly if you wish, seeing as this is a pycrypto group.</div><br><span style>Joel (Via Mobile)</span></div><div style>
<br>On Dec 28, 2012, at 2:16, "steve.yi" <<a href="mailto:steve.yi@139.com">steve.yi@139.com</a>> wrote:<br><br></div><blockquote type="cite" style><div><div style="font-size:13px;font-family:宋体;color:rgb(0,0,0)">
<br></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">Hi Pycryptors,</div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
I got some requests from my clients, his requests are xml formatted encrypted by AES with Java.</div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
I decide to use pycrypto to decrypt these xml requests. But i am not familiar with Java.</div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
Someone can help? Thanks a lot. Java codes as follows,</div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></div>
<div style="clear:both"><div style="clear:both"><font face="宋体"><span style="line-height:19px">Encrypt.java</span></font></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">============</div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
<br></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></div><div style="clear:both"><font face="宋体"><span style="line-height:19px">import java.io.UnsupportedEncodingException;</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px">import java.security.SecureRandom;</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br>
</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px">import javax.crypto.Cipher;</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px">import javax.crypto.KeyGenerator;</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px">import javax.crypto.SecretKey;</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px">import javax.crypto.spec.SecretKeySpec;</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><br></span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px">public class Encrypt {</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"><span class="Apple-tab-span" style="white-space:pre"> </span>public password = "123456";</span></font></div><div style="clear:both"><span class="Apple-tab-span" style="white-space:pre;line-height:19px"><font face="宋体"> </font></span></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> public Encrypt(String password) {</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"><span class="Apple-tab-span" style="white-space:pre"> </span>super();</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"><span class="Apple-tab-span" style="white-space:pre"> </span>this.password = password;</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"><span class="Apple-tab-span" style="white-space:pre"> </span>}</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"><span class="Apple-tab-span" style="white-space:pre"> </span>/** </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> * 加密 </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> * </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> * @param content 需要加密的内容 </span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> * @param password 加密密码 </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> * @return </span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> */ </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> public static byte[] encrypt(String content, String password) { </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> try { </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span></span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> KeyGenerator kgen = KeyGenerator.getInstance("AES"); //AES密钥生成器</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> //128是密钥的长度 SecureRandom是随机生成数 但是我们需要摄入确定的值</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> kgen.init(128, new SecureRandom(password.getBytes()));//初始化密钥</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> SecretKey secretKey = kgen.generateKey(); //分组秘密密钥（并为其提供类型安全）</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> byte[] enCodeFormat = secretKey.getEncoded(); </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); //对产生的密钥再进行封装 </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> Cipher cipher = Cipher.getInstance("AES");// 创建密码器 </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> byte[] byteContent = content.getBytes("utf-8"); //获得原文utf-8编码格式的字节数</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> cipher.init(Cipher.ENCRYPT_MODE, key);// 加密初始化 Cipher.ENCRYPT_MODE为加密</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> byte[] result = cipher.doFinal(byteContent); //密码器执行加密 并生成加密字节数组</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> return result; // 加密 </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> } catch (Exception e) { </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> e.printStackTrace(); </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> } </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> return null; </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> } </span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> /**解密 </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> * @param content 待解密内容 </span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> * @param password 解密密钥 </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> * @return </span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> */ </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> public static String decrypt(byte[] content, String password) { </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> try { </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> KeyGenerator kgen = KeyGenerator.getInstance("AES"); //AES密钥生成器</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> //128是密钥的长度 SecureRandom是随机生成数 但是我们需要摄入确定的值</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> kgen.init(128, new SecureRandom(password.getBytes())); //初始化密钥</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> SecretKey secretKey = kgen.generateKey(); //分组秘密密钥（并为其提供类型安全）</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> byte[] enCodeFormat = secretKey.getEncoded(); </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); //对产生的密钥再进行封装 </span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> Cipher cipher = Cipher.getInstance("AES");// 创建密码器 </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> cipher.init(Cipher.DECRYPT_MODE, key);// 解密初始化 Cipher.DECRYPT_MODE为解密</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> byte[] result = cipher.doFinal(content); //密码器执行解密密 并生成解密密字节数组</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> return new String(result); // 解密 </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> } catch (Exception e) { </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> e.printStackTrace(); </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> } </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> return null; </span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> } </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> </span></font></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
<br></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> public static String parseByte2HexStr(byte buf[]){</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>StringBuffer sb=new StringBuffer();</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>for(int i=0;i<buf.length;i++){</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>String hex=Integer.toHexString(buf[i]&0xFF);</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>if(hex.length()==1){</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>hex='0' + hex;</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>}</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>sb.append(hex.toUpperCase());</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>}</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>return sb.toString();</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> }</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> </span></font></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
<br></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> public static byte[] parseHexStr2Byte(String hexStr){</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>if(hexStr.length()<1)</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>return null;</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>byte[]result=new byte[hexStr.length()/2];</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>for(int i=0;i<hexStr.length()/2;i++){</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>int high=Integer.parseInt(hexStr.substring(i*2,i*2+1),16);</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>int low=Integer.parseInt(hexStr.substring(i*2+1,i*2+2),16);</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>result[i]=(byte)(high*16+low);</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>}</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>return result;</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>}</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> public static void main(String args[]) throws UnsupportedEncodingException {</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>String content = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<request>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span> "<company>1</company>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<requestId>2</requestId>"+</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<Create>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<CreateHost>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<userId>3</userId>"+</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<transactionId>4</transactionId>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<timestamp>5</timestamp>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<core>6</core>"+</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<memory>7</memory>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<os>4</os>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<groupName>5</groupName>"+</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<hostSpecId>5</hostSpecId>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<path>6</path>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"</CreateHost>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<CreateIp>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<transactionId>6</transactionId>"+</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<netSpeed>6</netSpeed>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<ip>7</ip>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"</CreateIp >"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<CreateDisk>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<transactionId>7</transactionId>"+</span></font></div><div style="clear:both">
<font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"<disk>7</disk>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"</CreateDisk>"+</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"</Create>"+</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>"</request>";</span></font></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> <span class="Apple-tab-span" style="white-space:pre"> </span>System.out.println("content:"+content);</span></font></div><div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)">
<span style="font-size:small"> </span><span class="Apple-tab-span" style="font-size:small;white-space:pre"> </span><span style="font-size:small">System.out.println("encrypted:"+(parseByte2HexStr(Encrypt.encrypt(content, "123456"))));</span></div>
<div style="clear:both;font-size:13px;font-family:宋体;color:rgb(0,0,0)"><span style="font-size:small"> </span><span class="Apple-tab-span" style="font-size:small;white-space:pre"> </span><span style="font-size:small">System.out.println("decrypted:"+Encrypt.decrypt(parseHexStr2Byte(parseByte2HexStr(Encrypt.encrypt(content, "123456"))),"123456"));</span></div>
<div style="clear:both"><font face="宋体"><span style="line-height:19px"> }</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"> </span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px"><br>
</span></font></div><div style="clear:both"><font face="宋体"><span style="line-height:19px">}</span></font></div><div style="color:rgb(0,0,0);font-family:宋体;font-size:13px"><br></div></div></div></blockquote><blockquote type="cite" style>
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