On Tuesday, June 4, 2019 at 5:11:24 AM UTC-4, Nataliia wrote:
>
> Hi all.
>
> How can I check is my RSA encryptor initialized? When the programm tries 
> to encrypt something via uninnitialize encryptor, I have exception "divide 
> by zero". 
>
> Can I write something like this before encryption:
>
> *If (m_encryptor != 0)*
> *      CryptoPP::StringSource(message_str, true, new 
> CryptoPP::StreamTransformationFilter(m_encryptor, new 
> CryptoPP::StringSink(result_str)));*
>

If m_encryptor is a pointer, then first check that it is not NULL. Then, 
check the modulus is not 0. The RSA pages has examples at 
https://www.cryptopp.com/wiki/RSA_Cryptography .

Jeff

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