Hi,
I'm trying to make a function encoding a string in AES
and then to encode it in base64, the prototype would be like :
string AESEncode(char *cleartext, char *key);
I watched on the forum and source code... I found a post with
someone encoding/decoding a buffer like that :
>>CTR_Mode<AES>::Encryption aes_ctr_enc(s_key, 16, s_iv);
>>aes_ctr_enc.ProcessString((unsigned char*)buf, buf_size);
I thought an encrypted buffer with AES could be a little bit
bigger than the clear one (since it's by block and not just
per caracter encoding), but maybe I'm wrong... Is there a
short way to encode with AES using string objects, right now
I just did something that looks like black magic, just for
testing, but I'm sure it can be MUCH cleaner and simpler,
here's the code :
string AESEncryptString(char *cleartext, char *key)
{
string clearstr = cleartext;
string result;
char *ok = new char[strlen(cleartext)+32];
strnset(ok, 0, strlen(cleartext)+32);
CTR_Mode<AES>::Encryption aes((const unsigned char*)key, strlen(key));
aes.ProcessString((unsigned char*)ok, (const unsigned char*)cleartext,
strlen(cleartext));
clearstr = ok;
delete ok;
StringSource(clearstr, true, new Base64Encoder(new StringSink(result)));
return result;
}
Thanks for help...
Florent,
>>And, simeple example for AES with Counter mode.
>>CTR_Mode<AES>::Encryption aes_ctr_enc(s_key, 16, s_iv);
>>aes_ctr_enc.ProcessString((unsigned char*)buf, buf_size);
>>CTR_Mode<AES>::Decryption aes_ctr_dec(s_key, 16, s_iv);
>>aes_ctr_dec.ProcessString((unsigned char*)buf, buf_size);
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