How do I handle SSL/TLS errors in C++?

How do I handle SSL/TLS errors in C++?

To handle SSL/TLS errors in C++, you can use the OpenSSL library. First, ensure you have error handling set up with SSL_get_error(). This function helps you determine the type of error that occurred during the SSL operation.

Can you give me an example of using SSL_get_error()?

Sure! Here's a simple example:

SSL *ssl; // Assume ssl is already initialized
int result = SSL_connect(ssl);
if (result <= 0) {
    int error = SSL_get_error(ssl, result);
    switch (error) {
        case SSL_ERROR_WANT_READ:
            // Handle the need for a read operation
            break;
        case SSL_ERROR_WANT_WRITE:
            // Handle the need for a write operation
            break;
        default:
            // Handle other errors
            break;
    }
}

What other common SSL/TLS errors should I be aware of?

Common SSL/TLS errors include SSL_ERROR_SYSCALL, which indicates a system call error, and SSL_ERROR_SSL, which indicates a failure in the SSL library itself. It's important to log these errors for debugging.

How can I improve the security of my SSL/TLS implementation?

To improve security, ensure you are using the latest version of OpenSSL, enable strong cipher suites, and regularly update your certificates. Additionally, consider implementing certificate pinning.