javascript - How to Decrypt RSA encrypted string from JSEncrypt using C# BouncyCastle -

i know there few posts regarding this, none of them solve issue cut chase.

i have encrypted string using jsencrypt (javascript) following code:

var rsa = new jsencrypt(); rsa.setpublickey(pubkey); var encrypted = rsa.encrypt($(this).text()); 

the public key stored in var so:

var pubkey = "-----begin public key-----\     migfma0gcsqgsib3dqebaquaa4gnadcbiqkbgqckskehcz6ztvnxkghbckfeenkf\     38j1hegww9uazlg5a7m/1aahkqkvkuofox+zsyh4cjr/mevmrea2ucpjkljxk14m\     74nzswyupxaikpfwxe7qvn1/0tiqahvheismqielil+ghiyac32e/wuyjhgfjbwl\     ej/hbdtkt6o/qajwkwidaqab\     -----end public key-----"; 

i use generated cipher text , send c# needs decrypt it. using bouncy castle , have written code such:

public string decrypt(string ciphertext) {     var bytestodecrypt = convert.frombase64string(ciphertext);     asymmetriccipherkeypair keypair;      using (var reader = file.opentext(appdomain.currentdomain.basedirectory + @"/scripts/private.pem"))     {         keypair = (asymmetriccipherkeypair)new pemreader(reader).readobject();     }     var engine = new rsaengine();     engine.init(false, keypair.private);      var decrypted = engine.processblock(bytestodecrypt, 0, bytestodecrypt.length);     var decryptedmessage = encoding.utf8.getstring(decrypted);     return decryptedmessage; } 

it decryption without error, output looks this:

"\u0002��lt�j;�ol�\u008fy�l:gk=\u0002�(�����\\\u0003ܢ�fmt�\u001eoqr�\\\u000f�s�a��+ښ�|����\u0001j�s�w[\u001egſ\u0012^7�\u000f44qy\a*�t�~tu�ei�o/<�\u000f!s:�]\u0018v<7s\n:x@���gȀ\u0016.w���lb�\0" 

i have tried use pksc#1 having this:

public string decrypt(string ciphertext) {     var bytestodecrypt = convert.frombase64string(ciphertext);     asymmetriccipherkeypair keypair;      using (var reader = file.opentext(appdomain.currentdomain.basedirectory + @"/scripts/private.pem"))     {         keypair = (asymmetriccipherkeypair)new pemreader(reader).readobject();     }     pkcs1encoding engine = new pkcs1encoding(new rsaengine());     engine.init(false, keypair.private);      var decrypted = engine.processblock(bytestodecrypt, 0, bytestodecrypt.length);     var decryptedmessage = encoding.utf8.getstring(decrypted);     return decryptedmessage;  } 

i have wrong here decryptedmessage = "" , decrypted bytes = bytes[0]

how fix decrypts ciphertext correctly.

as far know jsencrypt encrypts using pksc1 encoding default?

any appreciated.

please avoid rude comments, learning correctly why posting here.

thank in advance!