自己作了一个简单的加密provider（附源码），安装成功，却总是报jar包的错误，高手帮看看阿
自己作了一个简单的加密provider
package   security.cipher;
import   java.security.*;
public   final   class   Rot13Provider   extends   Provider   {

public   Rot13Provider(){
super( "Rot13Provider ",   1.0,
"Rot13Provider   1.0   provides   a   custom   ROT13   implementation. ");

//set   provider   properties
put( "Cipher.ROT13 ", "security.cipher.Rot13Cipher ");
}
}


其中security.cipher.Rot13Cipher扩展了CipherSpi


package   security.cipher;
public   class   Rot13Cipher   extends   CipherSpi   {

private   int   opmode   =   Cipher.ENCRYPT_MODE;
private   int   encryptionKey   =   13;
private   int   decryptionKey   =   243;

public   Rot13Cipher(){

}

//Implement   the   cipher
private   byte   cipher(byte   b){
int   key   =   encryptionKey;
if(opmode   ==   Cipher.DECRYPT_MODE){
key   =   decryptionKey;
}
return   (byte)((b   +   key)   %   256);
}

@Override
protected   byte[]   engineDoFinal(byte[]   input,   int   inputOffset,   int   inputLen)
throws   IllegalBlockSizeException,   BadPaddingException   {
byte[]   b   =   new   byte[   inputLen];
for(int   i=0;   i <inputLen;   ++i){
b[   i]   =   cipher(input[   inputOffset   +i]);
}
return   b;
}

@Override
protected   int   engineDoFinal(byte[]   input,   int   inputOffset,   int   inputLen
,   byte[]   output,int   outputOffset)  
                throws   ShortBufferException,   IllegalBlockSizeException,
BadPaddingException   {
String   msg   =   "Not   enough   room   in   output   buffer. ";
if((output.length   -   outputOffset)   <   inputLen){
throw   new   ShortBufferException(msg);
}
for(int   i=0;   i <inputLen;   ++i){
output[   outputOffset   +   i]   =   cipher(input[inputOffset   +   i]);
}
return   inputLen;
}

@Override
protected   int   engineGetBlockSize()   {

return   1;
}

@Override
protected   byte[]   engineGetIV()   {

return   null;
}

@Override
protected   int   engineGetOutputSize(int   inputLen)   {

return   inputLen;
}

@Override
protected   AlgorithmParameters   engineGetParameters()   {

return   null;
}

@Override
protected   void   engineInit(int   opmode,   Key   key,   SecureRandom   random)
throws   InvalidKeyException   {
      this.opmode   =   opmode;

}

@Override
protected   void   engineInit(int   opmode,   Key   key,   AlgorithmParameterSpec   params,
SecureRandom   random)   throws   InvalidKeyException,
InvalidAlgorithmParameterException   {