Input length must be multiple of 8 when decrypting with padded cipher

not necessary , is that got any way for these ?

Get rid of your own padding implementation. It shouldn't be necessary and it's actually wrong anyway

at the midlet side there
cipher can only call this function with these parameter
cipher.doFinal(nonBlockPlaintext, 0, nonBlockPlaintext.length, ciphertext, 0);
without
- cipher.doFinal()
- cipher.doFinal( byte[] ) and etc

if i put the cipher instance as "DES/CBC/NoPadding" , using
cipher.doFinal(nonBlockPlaintext, 0, nonBlockPlaintext.length, ciphertext, 0);
it will throw null exception

>>if i put the cipher instance as "DES/CBC/NoPadding"

I didn't suggest that. Just stop trying to pad it yourself

Can refer these website : -
http://www.herongyang.com/crypto/des_java_jce_sun_implementation_2.html
http://www.obviex.com/Articles/CiphertextSize.aspx
http://www.di-mgt.com.au/cryptopad.html#exampleecb
http://www.forum.nokia.com/infocenter/index.jsp?topic=/Java_Developers_Library/GUID-686CA455-519D-4895-B6D2-D26B234DAE81.html

"DES/CBC/NoPadding" this is no padding , means no blocksize calculation that i coded
and i recompiled it , it throws null exception .

"DES/CBC/PKCS5Padding" this got padding calculation that i coded above there, somehow this will be more secure than above

Sorry  - i don't understand your comments

i trying ur way

i had tried for ur way , but seems doesnet work .

do u know wat should i do when decrypting using this calculation ?
i follow the website references for ciphertext calculation , i think mayb my calculation in decryption should use other calculation

                int blocksize = 16;
                int ciphertextLength = 0;
                int remainder = ciphertext.length % blocksize;
                if (remainder == 0) {
                    ciphertextLength = ciphertext.length;
                }else{
                    ciphertextLength = ciphertext.length - remainder + blocksize;
                }

can u explain more for that ?

and then .. as u can u at the server side code there...

         cipher.init(Cipher.DECRYPT_MODE, key, iv);                
                /**** Remove cipher text length
                int blocksize = 16;
                int ciphertextLength = 0;
                int remainder = ciphertext.length % blocksize;
                if (remainder == 0) {
                    ciphertextLength = ciphertext.length;
                }else{
                    ciphertextLength = ciphertext.length - remainder + blocksize;
                }
                ****/
             
            // how should i know the exact byte size require ?
            decrypted = new byte[ciphertextLength];

/** doFinal api
public final int doFinal(byte[] input,
                         int inputOffset,
                         int inputLen,
                         byte[] output,
                         int outputOffset)
                  throws ShortBufferException,
                         IllegalBlockSizeException,
                         BadPaddingException    
**/      
/**
Parameters:
input - the input buffer
inputOffset - the offset in input where the input starts
inputLen - the input length
output - the buffer for the result
outputOffset - the offset in output where the result is stored            
**/
            cipher.doFinal(ciphertext, 0, ciphertext.length, decrypted, 0);  

and then the code above i tested in localhost is running successfully for encryption & decryption , from midlet to tomcat localhost , but whenever i upload to server

start sending from midlet to live tomcat server , is getting error , and i checked the server log , is giving
exception :
Input length must be multiple of 8 when decrypting with padded cipher

>>
melwong:
can u explain more for that ?

I don't know how it can be put any simpler - STOP DOING YOUR OWN PADDING

hi , i had found solution on this , no any modification on above code.

when i transmit the string , i convert into hex string but not base64 then decrypt again using hex string and trim the extra padding , then ....... it works !! :D