java - How can I find an Android encryption library or class compatable with my C# code? -

i using following class data encryption in c# .net. know equivalent library or algorithm in java android transferring data between android , web-service?

using system; using system.data; using system.configuration; using system.web; using system.web.security; using system.web.ui; using system.web.ui.webcontrols; using system.web.ui.webcontrols.webparts; using system.web.ui.htmlcontrols; using system.security.cryptography; using system.io; using system.text;  /// <summary> /// summary description crypto /// </summary>  public enum symmprovenum : int         {             des, rc2, rijndael         } public class crypto {      string globalkey = "test";         private symmetricalgorithm mobjcryptoservice;          /// <remarks>         /// constructor using intrinsic .net symmetricalgorithm class.         /// </remarks>         public crypto()         {             //switch (netselected)             //{             //    case symmprovenum.des:             //        mobjcryptoservice = new descryptoserviceprovider();             //        break;             //    case symmprovenum.rc2:             //        mobjcryptoservice = new rc2cryptoserviceprovider();             //        break;             //    case symmprovenum.rijndael:             //        mobjcryptoservice = new rijndaelmanaged();             //        break;             //}             mobjcryptoservice = new rijndaelmanaged();         }          /// <remarks>         /// constructor using customized symmetricalgorithm class.         /// </remarks>         //public crypto(symmetricalgorithm serviceprovider)         //{         //    mobjcryptoservice = serviceprovider;         //}          /// <remarks>         /// depending on legal key size limitations of specific cryptoservice provider         /// , length of private key provided, padding secret key space character         /// meet legal size of algorithm.         /// </remarks>         private byte[] getlegalkey(string key)         {             string key = globalkey;             string stemp;             if (mobjcryptoservice.legalkeysizes.length > 0)             {                 int lesssize = 0, moresize = mobjcryptoservice.legalkeysizes[0].minsize;                 // key sizes in bits                 while (key.length * 8 > moresize)                 {                     lesssize = moresize;                     moresize += mobjcryptoservice.legalkeysizes[0].skipsize;                 }                 stemp = key.padright(moresize / 8, ' ');             }             else                 stemp = key;              // convert secret key byte array             return asciiencoding.ascii.getbytes(stemp);         }          public string encrypt(string source)         {             string key = globalkey;             byte[] bytin = system.text.asciiencoding.ascii.getbytes(source);             // create memorystream process can done without i/o files             system.io.memorystream ms = new system.io.memorystream();              byte[] bytkey = getlegalkey(key);              // set private key             mobjcryptoservice.key = bytkey;             mobjcryptoservice.iv = bytkey;              // create encryptor provider service instance             icryptotransform encrypto = mobjcryptoservice.createencryptor();              // create crypto stream transforms stream using encryption             cryptostream cs = new cryptostream(ms, encrypto, cryptostreammode.write);              // write out encrypted content memorystream             cs.write(bytin, 0, bytin.length);             cs.flushfinalblock();              // output , trim '\0' bytes             byte[] bytout = ms.getbuffer();             int = 0;             (i = 0; < bytout.length; i++)                 if (bytout[i] == 0)                     break;              // convert base64 result can used in xml             return system.convert.tobase64string(bytout, 0, i);         }          public string decrypt(string source)         {             string key = globalkey;             // convert base64 binary             byte[] bytin = system.convert.frombase64string(source);             // create memorystream input             system.io.memorystream ms = new system.io.memorystream(bytin, 0, bytin.length);              byte[] bytkey = getlegalkey(key);              // set private key             mobjcryptoservice.key = bytkey;             mobjcryptoservice.iv = bytkey;              // create decryptor provider service instance             icryptotransform encrypto = mobjcryptoservice.createdecryptor();              // create crypto stream transforms stream using decryption             cryptostream cs = new cryptostream(ms, encrypto, cryptostreammode.read);              // read out result crypto stream             system.io.streamreader sr = new system.io.streamreader( cs );             return sr.readtoend();         } } 

i wrote crypto class should work code, given correct configuration.

you can check out here: https://github.com/untouchab1e/yubinotes/blob/master/android/src/com/connectutb/yubinotes/util/crypto.java

you're using des in example, flawed , obsolete algorithm (alternatively use 3des), suggest moving aes provides better encryption.