Method setAESPseudoRandomFunctionKey

src/jlsrtp.cpp:1048–1108

}

int JLSRTP::setAESPseudoRandomFunctionKey(ActiveCrypto crypto_attrib /*= ACTIVE_CRYPTO*/)
{
    ActiveCrypto active_crypto = INVALID_CRYPTO;
    int rc = 0;
    int retVal = 0;

    if (_pseudorandomstate.cipher != nullptr)
    {
        if (crypto_attrib == ACTIVE_CRYPTO)
        {
            active_crypto = _active_crypto;
        }
        else
        {
            active_crypto = crypto_attrib;
        }

        switch (active_crypto)
        {
            case PRIMARY_CRYPTO:
            {
                rc = EVP_EncryptInit_ex(_pseudorandomstate.cipher, nullptr, nullptr, _primary_crypto.master_key.data(), nullptr);
                if (rc == 1)
                {
                    retVal = 0;
                }
                else
                {
                    retVal = -2;
                }
            }
            break;

            case SECONDARY_CRYPTO:
            {
                rc = EVP_EncryptInit_ex(_pseudorandomstate.cipher, nullptr, nullptr, _secondary_crypto.master_key.data(), nullptr);
                if (rc == 1)
                {
                    retVal = 0;
                }
                else
                {
                    retVal = -3;
                }
            }
            break;

            default:
            {
                retVal = -4;
            }
            break;
        }
    }
    else
    {
        retVal = -1;
    }