A Java des Plus decryption class converted to C #

Original: A Java des plus decryption class converted to C #

A Java DES encryption decryption code is as follows:

Package Com.visionsky.util;import Java.security.*;//import Java.util.regex.pattern;//import java.util.Hashtable; Import Javax.crypto.*;import javax.crypto.spec.*;import sun.misc.*;/** * des encryption Decrypt */public class Desplus {private Stati C String strdefaultkey = "PLFP"; Default key private static final byte[] IV = {0x12, 0x34, 0x56, 0x78, (Byte) 0x90, (Byte) 0xAB, (Byte) 0xCD, (byte) 0xef};// Des vector private static base64encoder enc = new Base64encoder ();//Convert byte[] to string private static Base64decoder Dec = New Base64decoder ();            Convert string to byte[]/** * Encrypted byte array * * @param ARRB * byte array to be encrypted * @param key * Key * @return Encrypted byte array * @throws Exception */public static byte[] Encrypt (byte[] ARRB, String key) throws        Exception {Deskeyspec Deskeyspec = new Deskeyspec (Key.getbytes ());        Secretkeyfactory keyfactory = secretkeyfactory.getinstance ("DES");      Secretkey Secretkey = Keyfactory.generatesecret (Deskeyspec);  Ivparameterspec IVP = new Ivparameterspec (DESPLUS.IV);        Cipher Encryptcipher = cipher.getinstance ("des/cbc/pkcs5padding");        Encryptcipher.init (Cipher.encrypt_mode, Secretkey, IVP);    Return encryptcipher.dofinal (ARRB); }/** * Encrypt String * * @param XML * String to be encrypted * @param key * key * @return Encryption After the string * @throws Exception */public static string encrypt (string XML, String key) throws Exception {//r     Eturn DESPlus.enc.encode (Encrypt (xml.getbytes (), key); return new String (Encrypt (xml.getbytes (), key)); /** * Use default public key to encrypt string * @param XML string to encrypt * @return encrypted String * @throws Exception * *    String Encrypt (string xml) throws Exception {return encrypt (XML, Strdefaultkey);  }/** * Decrypt byte array * * @param ARRB * required to decrypt byte array * @param key * key * @return Decrypted byte array * @throws Exception */public static byte[] DecrypT (byte[] ARRB, String key) throws Exception {Deskeyspec Deskeyspec = new Deskeyspec (Key.getbytes ());        Secretkeyfactory keyfactory = secretkeyfactory.getinstance ("DES");        Secretkey Secretkey = Keyfactory.generatesecret (Deskeyspec);        Ivparameterspec IVP = new Ivparameterspec (DESPLUS.IV);        Cipher Decryptcipher = cipher.getinstance ("des/cbc/pkcs5padding");        Decryptcipher.init (Cipher.decrypt_mode, Secretkey, IVP);    Return decryptcipher.dofinal (ARRB); /** * Decrypt String * * @param XML * The string to be decrypted * @param key * key * @return decrypted After the string * @throws Exception */public static string decrypt (string XML, String key) throws Exception {RET    Urn New String (Decrypt (DESPlus.dec.decodeBuffer (XML), key)); /** * Decrypts the string with the default public key * @param the string that the XML needs to decrypt * @return decrypted String * @throws Exception * * String decrypt (String xml) throws Exception {return decrypt (XML,Strdefaultkey);  }/** * Generates a key from the specified string, the required byte array length for the key is 8 bits less than 8 bits when the back is 0, beyond the 8 bits to take the first 8 bits * * @param arrbtmp * The byte array that makes up the string *  @return generated key * @throws java.lang.Exception */private key GetKey (byte[] arrbtmp) throws Exception {//        Create an empty 8-byte array (default is 0) byte[] arrb = new Byte[8]; Converts the original byte array to 8-bit for (int i = 0; i < arrbtmp.length && i < arrb.length; i++) {arrb[i] = AR        Rbtmp[i];        }//Generate key Key key = new Javax.crypto.spec.SecretKeySpec (ARRB, "DES");    Return key;    }/** * Gets the default key * @return */public static String Getdeskey () {return desplus.strdefaultkey;            } public static void Main (string[] args) {try {//test key String key = "BOC_PLFP"; 004 Trade Case String XML = "<?xml version=\" 1.0\ "encoding=\" utf-8\ "? ><root>
The result of the above operation is:

Key: BOC_PLFP
String before encryption: <?xml version= "1.0" encoding= "UTF-8"?><root>String length before encryption: 262
Encrypted string: BE5N44GJYFO3SDUS6/OHVG4I4L725S2VWCKBRXYOAD/EANYUADKXENNGVXJMJ3AJJZNDNTV364RH
Yw2bf33lmeabmu43hfs8dcxx7+qrcijp3mrk7ujdinhu4t4ohmeqetfzqu5oh2xy1sbbppdgegmf
/ogurvatblzl/ylkfc6c9bnnsd0iwl0ks7mi73+v76p+afdpgxqc7u4vkq8cd6+hgherbhbji729
Jpjkm5l2yaaw4q06oi4ymoeasdjyf7aa1x/fwqclszimsdb0okgoiuj857l94bm1zyl2rtwdxa9o
0beil4cbevksc3u3pydai0+mzbte0svkyp0sxtke7ifrwimg
String length after encryption: 360
Decrypted string: <?xml version= "1.0" encoding= "UTF-8"?><root>Decrypted string length: 262


Reference to http://www.lijingquan.net/des-c-php-java.html, modify the inside of the Des Vector IV, character encoding UTF8 default, etc., and finally
Rewrite the C # code as follows:
Using system;using system.collections.generic;using system.linq;using system.text;using System.security.cryptography;public class des{Private Const string Defaultkey = "BOC_PLFP";//default key private static B Yte[] IV = {0x12, 0x34, 0x56, 0x78, (Byte) 0x90, (Byte) 0xAB, (Byte) 0xCD, (byte) 0xef};//des vector///<s Ummary>//DES encryption//</summary>//<param name= "Ptoencrypt" > String to encrypt. </param>//<param name= "SKey" > key, and must be 8-bit. Default public key Encryption string defaultkey</param>//<returns> The encrypted string returned in BASE64 format. </returns> public static string Encrypt (String ptoencrypt, String sKey = Defaultkey) {using (Descrypto ServiceProvider des = new DESCryptoServiceProvider ()) {byte[] Inputbytearray = Encoding.Default.GetByte            S (ptoencrypt); Des.            Key = ASCIIEncoding.ASCII.GetBytes (SKey);  DES.IV = IV;            ASCIIEncoding.ASCII.GetBytes (SKey); System.IO.MemoryStream ms = new System.IO.MemoryStreAM (); using (CryptoStream cs = new CryptoStream (MS, Des. CreateEncryptor (), cryptostreammode.write)) {cs.                Write (Inputbytearray, 0, inputbytearray.length); Cs.                FlushFinalBlock (); Cs.            Close (); } string str = Convert.tobase64string (MS.            ToArray ()); Ms.            Close ();        return str; }}///<summary>//des decryption//</summary>//<param name= "Ptodecrypt" > to Decrypt With base64</param>//<param name= "SKey" > key, and must be 8 bits. The default public key decryption string defaultkey</param>//<returns> decrypted string. </returns> public static string Decrypt (String ptodecrypt, String sKey = Defaultkey) {byte[] Inputbyte        Array = convert.frombase64string (Ptodecrypt); using (DESCryptoServiceProvider des = new DESCryptoServiceProvider ()) {des.            Key = ASCIIEncoding.ASCII.GetBytes (SKey); DES.IV = IV; ASCIIEncoding.ASCII.GetBytes (SKey);            System.IO.MemoryStream ms = new System.IO.MemoryStream (); using (CryptoStream cs = new CryptoStream (MS, Des. CreateDecryptor (), cryptostreammode.write)) {cs.                Write (Inputbytearray, 0, inputbytearray.length); Cs.                FlushFinalBlock (); Cs.            Close (); } string str = Encoding.Default.GetString (MS.            ToArray ()); Ms.            Close ();        return str; }    }}
Tested, the results of encryption and decryption are the same as in Java.


A Java des Plus decryption class converted to C #