How do I validate untrusted input in C++?

Validating untrusted input in C++ is crucial for ensuring the security and stability of applications. This involves techniques to prevent buffer overflows, injection attacks, and other vulnerabilities. Proper validation ensures that the input conforms to expected formats before processing it.

input validation, C++, security, buffer overflow, data integrity

#include 
#include 
#include 

bool isValidEmail(const std::string &email) {
    const std::regex pattern(R"((\w+)(\.\w+)*@(\w+)(\.\w+)+)");
    return std::regex_match(email, pattern);
}

int main() {
    std::string userInput;
    std::cout << "Enter your email: ";
    std::getline(std::cin, userInput);

    if (isValidEmail(userInput)) {
        std::cout << "Valid email format." << std::endl;
    } else {
        std::cout << "Invalid email format." << std::endl;
    }
    return 0;
}

input validation C++ security buffer overflow data integrity

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