int main(void)
{
size_t clen;
for (clen = 0; clen < sizeof c; ++clen) {
randombytes_buf(key, sizeof key);
randombytes_buf(c, clen);
crypto_auth_hmacsha512(a, c, clen, key);
if (crypto_auth_hmacsha512_verify(a, c, clen, key) != 0) {
printf("fail %u\n", (unsigned int) clen);
return 100;
}
if (clen > 0) {
c[(size_t) rand() % clen] += 1 + (rand() % 255);
if (crypto_auth_hmacsha512_verify(a, c, clen, key) == 0) {
printf("forgery %u\n", (unsigned int) clen);
return 100;
}
a[rand() % sizeof a] += 1 + (rand() % 255);
if (crypto_auth_hmacsha512_verify(a, c, clen, key) == 0) {
printf("forgery %u\n", (unsigned int) clen);
return 100;
}
}
}
return 0;
}
void c_rpc_server::c_session::read_handler_hmac(const boost::system::error_code &error, std::size_t bytes_transferred) {
_dbg("readed " << bytes_transferred << " bytes of hmac authenticator");
_dbg("authenticate message");
if (error) {
_dbg("asio error " << error.message());
delete_me();
return;
}
int ret = crypto_auth_hmacsha512_verify(m_hmac_authenticator.data(),
reinterpret_cast<const unsigned char *>(m_received_data.data()),
m_received_data.size(),
m_hmac_key.data()
);
if (ret == -1) {
_warn("hmac authentication error");
delete_me();
return;
}
assert(ret == 0);
try {
execute_rpc_command(m_received_data);
} catch (const std::exception &e) {
_erro( "exception read_handler " << e.what());
_erro( "close connection\n" );
delete_me();
return;
}
}
