NewLC - AES Encryption - Comments

Re: AES Encryption

giuseppe_ottelli — Sun, 16 Dec 2007 22:43:08 +0100

Hi everybody,
I'm trying to use this implementation, but I have some problems... I open a file and then I read the data from it in a TBuf8 buffer but I can't convert this butter in an TUint8*. My code:

                while(posizione != dimInput){
                        err = input.Read(posizione,letto);
                        letto2 = letto.Ptr();
                        out_be = aes::blockEncrypt(&pluto,&pippo, letto2, 1024, scritto2);
                        scritto.Copy(scritto2, 1024);
                        output.Write(scritto);
                        posizione = posizione + letto.Size();
                        console->Printf(_L("%d\n"),posizione);
                }

where input and output are RFile object, scritto and letto TBuf8
Someone can help me?

Thanks in advance
Giuseppe

Re: AES Encryption

mobile_f — Mon, 20 Aug 2007 13:15:55 +0200

Hi danielwang99

my problem is same as your problem.i m also trying to decrypt my data on server side but its not working for me;while i m decrypting it in same class, without any error i did it.can u help me if u have the solution for this problem.

Thanx in advance

Best Regards

Mobile_f

Re: AES Encryption

danielwang99 — Thu, 09 Aug 2007 03:55:51 +0200

i encrypted data following the example but failed to decrypt the encrypted data on the server side.

my server side works with bouncycastle's AES implementation

regards

Re: AES Encryption

m00gl3 — Wed, 08 Aug 2007 11:49:35 +0200

Is this a good AES implementation?

Or there is a better Symbian one?

AES Encryption

tmas79 — Tue, 28 Nov 2006 14:01:22 +0100

The Rijndael example works fine for me when used as a standard application on e.g. a Nokia 5500. However, when I try to access the code as a Python extension, I get the compiler error: 'declaration syntax error' near

typedef TUint8 BYTE;

in the rijndael-api-symbianos.h file. Do anyone know why?

Thanks in advance!

AES Encryption

Anonymous — Fri, 27 Oct 2006 09:02:31 +0200

Could someone explain: Why in example keylen is given 128 bits = 16 bytes but key is constant of key material is 32 bytes?

AES Encryption

liadalex — Wed, 18 Oct 2006 14:30:43 +0200

Hi. I use The AES version for Symbian. If I encrypt or decrypt a message by means of the proposed API, after I don't succeed to decrypt or encrypt the message by means of another implementation. Could someone help me? Thanks in advance.

AES Encryption

Anonymous — Mon, 14 Aug 2006 22:04:30 +0200

Can some one please post a example how to call these AES API's from symbian OS c++ code. I am new to symbian c++. I would grately appreciate your help.

AES Encryption

Anonymous — Tue, 09 May 2006 19:18:07 +0200

It looks like the internal block buffer is initialized with 0xCC. :-) That's a problem with block ciphers in principle. You have to append some padding bytes to your string to create exactly string which length is a multiple of the block size. In case you are encrypting a string a simple solution would be to append some spaces. Please note that a arbitrary padding may introduce some security issues...

AES Encryption

Halim — Tue, 09 May 2006 08:51:37 +0200

Hello Philipp, I got a problem when I encrypt message less than blocklen: the decrypted message contains "extra" weird string.

// Secret message (which fits less than one block)

_LIT8(KMySecret, "Hello"); // 5 byte message

...

// decryptedText contains "Hello╠╠╠╠╠╠╠╠╠╠╠"

//(Hello+0xcc,0xcc,0xcc,0xcc,0xcc,0xcc,0xcc,0xcc,0xcc,0xcc,0xcc)

AES Encryption

philipphenkel — Wed, 18 May 2005 09:49:49 +0200

The US National Institute of Standards and Technology selected the Rijndael block cipher as Advanced Encryption Standard (AES). Rijndael is free and a reference implementation is available. This port to Symbian OS is based on the reference implementation v2.2 provided by the IAIK Krypto Group AES Lounge.