Hello, I have started picking up on encrytion, and I seem to have an error when I run the program. Here is the error:

Exception in thread "main" java.security.NoSuchAlgorithmException: Cannot find any provider supporting ES/ECB/PKCS5Padding
    at javax.crypto.Cipher.getInstance(Cipher.java:453)
    at GenerateKey.encrypt(GenerateKey.java:41)
    at GenerateKey.<init>(GenerateKey.java:24)
    at GenerateKey.main(GenerateKey.java:71)

Here is my GenerateKey class:

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.*;  
import javax.crypto.*;  
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;


public class GenerateKey {

    private Key k;


    public GenerateKey(String message)throws NoSuchAlgorithmException, IOException, IllegalBlockSizeException, NoSuchPaddingException, BadPaddingException{
        generateKey();

         String encrypted = encrypt(message);
         System.out.println("encrypted message: " + encrypted);

         String decrypted = decrypt(encrypted);
         System.out.println("decrypted message: " + decrypted);



    }
    public void generateKey() throws IOException, NoSuchAlgorithmException{
        KeyGenerator gen;
        gen = KeyGenerator.getInstance("DES");
        gen.init(new SecureRandom());
        k = gen.generateKey();
    }

    public String encrypt(String message) throws IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException, UnsupportedEncodingException, BadPaddingException{
        Cipher ci = Cipher.getInstance("ES/ECB/PKCS5Padding");


        byte[] stringBytes = message.getBytes("UTF8");

        byte[] raw = ci.doFinal(stringBytes);

        Base64Coder co = new Base64Coder();
        String base64 = co.encodeLines(raw);
        return base64;
    }

    public String decrypt(String message){
        try{
            Cipher cipher = Cipher.getInstance("DES/EGB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, k);

            Base64Coder decoder = new Base64Coder();
            byte[] raw = decoder.decode(message);
            byte[] stringBytes = cipher.doFinal(raw);
            String clear = new String(stringBytes, "UTF8");
            return clear;
        }catch(Exception evt){
            return "";
        }
    }


    public static void main(String[] args) throws NoSuchAlgorithmException, IllegalBlockSizeException, NoSuchPaddingException, BadPaddingException, IOException{
        String s = "hello world";
        GenerateKey kd = new GenerateKey(s);
    }


}

Also the encoder I am using:

/**
* A Base64 encoder/decoder.
*
* <p>
* This class is used to encode and decode data in Base64 format as described in RFC 1521.
*
* <p>
* Project home page: <a href="http://www.source-code.biz/base64coder/java/">www.source-code.biz/base64coder/java</a><br>
* Author: Christian d'Heureuse, Inventec Informatik AG, Zurich, Switzerland<br>
* Multi-licensed: EPL / LGPL / GPL / AL / BSD / MIT.
*/
public class Base64Coder {

// The line separator string of the operating system.
private static final String systemLineSeparator = System.getProperty("line.separator");

// Mapping table from 6-bit nibbles to Base64 characters.
private static final char[] map1 = new char[64];
   static {
      int i=0;
      for (char c='A'; c<='Z'; c++) map1[i++] = c;
      for (char c='a'; c<='z'; c++) map1[i++] = c;
      for (char c='0'; c<='9'; c++) map1[i++] = c;
      map1[i++] = '+'; map1[i++] = '/'; }

// Mapping table from Base64 characters to 6-bit nibbles.
private static final byte[] map2 = new byte[128];
   static {
      for (int i=0; i<map2.length; i++) map2[i] = -1;
      for (int i=0; i<64; i++) map2[map1[i]] = (byte)i; }

/**
* Encodes a string into Base64 format.
* No blanks or line breaks are inserted.
* @param s  A String to be encoded.
* @return   A String containing the Base64 encoded data.
*/
public static String encodeString (String s) {
   return new String(encode(s.getBytes())); }

/**
* Encodes a byte array into Base 64 format and breaks the output into lines of 76 characters.
* This method is compatible with <code>sun.misc.BASE64Encoder.encodeBuffer(byte[])</code>.
* @param in  An array containing the data bytes to be encoded.
* @return    A String containing the Base64 encoded data, broken into lines.
*/
public static String encodeLines (byte[] in) {
   return encodeLines(in, 0, in.length, 76, systemLineSeparator); }

/**
* Encodes a byte array into Base 64 format and breaks the output into lines.
* @param in            An array containing the data bytes to be encoded.
* @param iOff          Offset of the first byte in <code>in</code> to be processed.
* @param iLen          Number of bytes to be processed in <code>in</code>, starting at <code>iOff</code>.
* @param lineLen       Line length for the output data. Should be a multiple of 4.
* @param lineSeparator The line separator to be used to separate the output lines.
* @return              A String containing the Base64 encoded data, broken into lines.
*/
public static String encodeLines (byte[] in, int iOff, int iLen, int lineLen, String lineSeparator) {
   int blockLen = (lineLen*3) / 4;
   if (blockLen <= 0) throw new IllegalArgumentException();
   int lines = (iLen+blockLen-1) / blockLen;
   int bufLen = ((iLen+2)/3)*4 + lines*lineSeparator.length();
   StringBuilder buf = new StringBuilder(bufLen);
   int ip = 0;
   while (ip < iLen) {
      int l = Math.min(iLen-ip, blockLen);
      buf.append (encode(in, iOff+ip, l));
      buf.append (lineSeparator);
      ip += l; }
   return buf.toString(); }

/**
* Encodes a byte array into Base64 format.
* No blanks or line breaks are inserted in the output.
* @param in  An array containing the data bytes to be encoded.
* @return    A character array containing the Base64 encoded data.
*/
public static char[] encode (byte[] in) {
   return encode(in, 0, in.length); }

/**
* Encodes a byte array into Base64 format.
* No blanks or line breaks are inserted in the output.
* @param in    An array containing the data bytes to be encoded.
* @param iLen  Number of bytes to process in <code>in</code>.
* @return      A character array containing the Base64 encoded data.
*/
public static char[] encode (byte[] in, int iLen) {
   return encode(in, 0, iLen); }

/**
* Encodes a byte array into Base64 format.
* No blanks or line breaks are inserted in the output.
* @param in    An array containing the data bytes to be encoded.
* @param iOff  Offset of the first byte in <code>in</code> to be processed.
* @param iLen  Number of bytes to process in <code>in</code>, starting at <code>iOff</code>.
* @return      A character array containing the Base64 encoded data.
*/
public static char[] encode (byte[] in, int iOff, int iLen) {
   int oDataLen = (iLen*4+2)/3;       // output length without padding
   int oLen = ((iLen+2)/3)*4;         // output length including padding
   char[] out = new char[oLen];
   int ip = iOff;
   int iEnd = iOff + iLen;
   int op = 0;
   while (ip < iEnd) {
      int i0 = in[ip++] & 0xff;
      int i1 = ip < iEnd ? in[ip++] & 0xff : 0;
      int i2 = ip < iEnd ? in[ip++] & 0xff : 0;
      int o0 = i0 >>> 2;
      int o1 = ((i0 &   3) << 4) | (i1 >>> 4);
      int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);
      int o3 = i2 & 0x3F;
      out[op++] = map1[o0];
      out[op++] = map1[o1];
      out[op] = op < oDataLen ? map1[o2] : '='; op++;
      out[op] = op < oDataLen ? map1[o3] : '='; op++; }
   return out; }

/**
* Decodes a string from Base64 format.
* No blanks or line breaks are allowed within the Base64 encoded input data.
* @param s  A Base64 String to be decoded.
* @return   A String containing the decoded data.
* @throws   IllegalArgumentException If the input is not valid Base64 encoded data.
*/
public static String decodeString (String s) {
   return new String(decode(s)); }

/**
* Decodes a byte array from Base64 format and ignores line separators, tabs and blanks.
* CR, LF, Tab and Space characters are ignored in the input data.
* This method is compatible with <code>sun.misc.BASE64Decoder.decodeBuffer(String)</code>.
* @param s  A Base64 String to be decoded.
* @return   An array containing the decoded data bytes.
* @throws   IllegalArgumentException If the input is not valid Base64 encoded data.
*/
public static byte[] decodeLines (String s) {
   char[] buf = new char[s.length()];
   int p = 0;
   for (int ip = 0; ip < s.length(); ip++) {
      char c = s.charAt(ip);
      if (c != ' ' && c != '\r' && c != '\n' && c != '\t')
         buf[p++] = c; }
   return decode(buf, 0, p); }

/**
* Decodes a byte array from Base64 format.
* No blanks or line breaks are allowed within the Base64 encoded input data.
* @param s  A Base64 String to be decoded.
* @return   An array containing the decoded data bytes.
* @throws   IllegalArgumentException If the input is not valid Base64 encoded data.
*/
public static byte[] decode (String s) {
   return decode(s.toCharArray()); }

/**
* Decodes a byte array from Base64 format.
* No blanks or line breaks are allowed within the Base64 encoded input data.
* @param in  A character array containing the Base64 encoded data.
* @return    An array containing the decoded data bytes.
* @throws    IllegalArgumentException If the input is not valid Base64 encoded data.
*/
public static byte[] decode (char[] in) {
   return decode(in, 0, in.length); }

/**
* Decodes a byte array from Base64 format.
* No blanks or line breaks are allowed within the Base64 encoded input data.
* @param in    A character array containing the Base64 encoded data.
* @param iOff  Offset of the first character in <code>in</code> to be processed.
* @param iLen  Number of characters to process in <code>in</code>, starting at <code>iOff</code>.
* @return      An array containing the decoded data bytes.
* @throws      IllegalArgumentException If the input is not valid Base64 encoded data.
*/
public static byte[] decode (char[] in, int iOff, int iLen) {
   if (iLen%4 != 0) throw new IllegalArgumentException ("Length of Base64 encoded input string is not a multiple of 4.");
   while (iLen > 0 && in[iOff+iLen-1] == '=') iLen--;
   int oLen = (iLen*3) / 4;
   byte[] out = new byte[oLen];
   int ip = iOff;
   int iEnd = iOff + iLen;
   int op = 0;
   while (ip < iEnd) {
      int i0 = in[ip++];
      int i1 = in[ip++];
      int i2 = ip < iEnd ? in[ip++] : 'A';
      int i3 = ip < iEnd ? in[ip++] : 'A';
      if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127)
         throw new IllegalArgumentException ("Illegal character in Base64 encoded data.");
      int b0 = map2[i0];
      int b1 = map2[i1];
      int b2 = map2[i2];
      int b3 = map2[i3];
      if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0)
         throw new IllegalArgumentException ("Illegal character in Base64 encoded data.");
      int o0 = ( b0       <<2) | (b1>>>4);
      int o1 = ((b1 & 0xf)<<4) | (b2>>>2);
      int o2 = ((b2 &   3)<<6) |  b3;
      out[op++] = (byte)o0;
      if (op<oLen) out[op++] = (byte)o1;
      if (op<oLen) out[op++] = (byte)o2; }
   return out; }

// Dummy constructor.
public Base64Coder() {}

} // end class Base64Coder

What am I doing wrong?

there are multiple errors in your program.
1) Spelling mistake while calling Cipher.getInstance() method in encrypt().It must be DES not ES
2) Cipher initailisation missing in encrypt() method.
3) Change in decrpty method .It is ECB not EGB .Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
4) static methods must be called directly by class name not by objects.(eg: Base64Coder.encodeLines())
5) call decodeLines() method in your decrypt() method instead of decode() as you have encrypted it by using encodeLines() method.

 public String encrypt(String message) throws IllegalBlockSizeException, NoSuchAlgorithmException, NoSuchPaddingException, UnsupportedEncodingException, BadPaddingException, InvalidKeyException{
      //Spelling mistake here.It must be DES not ES
        Cipher ci = Cipher.getInstance("DES/ECB/PKCS5Padding");
//Error
        ci.init(Cipher.ENCRYPT_MODE, k);
        byte[] stringBytes = message.getBytes("UTF8");
   byte[] raw = ci.doFinal(stringBytes);

    Base64Coder co = new Base64Coder();
    String base64 =Base64Coder.encodeLines(raw);//encodeLines() must be called in static way by classname not with object as it is static method
    return base64;

    }


  public String decrypt(String message){
        try{
                Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");   //Change EGB to ECB
            cipher.init(Cipher.DECRYPT_MODE, k);
            Base64Coder decoder = new Base64Coder();

                byte[] raw = Base64Coder.decodeLines(message);     //use method decodeLines() instead of decode as you have used encodeLines() for encoding.Also use it in static way.
            byte[] stringBytes = cipher.doFinal(raw);
            String clear = new String(stringBytes, "UTF8");
            return clear;
        }catch(Exception evt){
            return "";
        }
    }

Edited 3 Years Ago by IIM

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