Hi all,
I have a doubt about the maximum message length allowed to generate a
RSA signature.
The message length is 36 bytes, and I would like to know which is the
minimum size of N for this message.
In general, I would need the relation between message length and N size.
Although I have read that there is no limit on message length, I got an
execution error when the key is too short (size(N) = 45 bytes).
I use Crypto++ Version 4.1.
My code is the following:
// the private key is encoded Hexadecimal
StringSource sPri(p_priclave, true, new HexDecoder);
RSASSA_PKCS1v15_SHA_Signer privkey(sPri);
AutoSeededRandomPool rp;
std::string sSignature;
StringSource(p_msg, true, new SignerFilter(rp, privkey, new
StringSink(sSignature)));
I hope you can help me.
Thanks in advance.
Sergio.
