What are advanced hash functions in C++?

What are advanced hash functions in C++?

Advanced hash functions in C++ are algorithms that transform input data into a fixed-size string of characters, which is typically a hash code. They are used in various applications like data integrity, cryptography, and hash tables.

Can you give me examples of advanced hash functions?

Sure! Some examples include SHA-256, SHA-3, and BLAKE2. Each has its own strengths in terms of security and performance.

How do I implement SHA-256 in C++?

You can implement SHA-256 in C++ using libraries like OpenSSL or Crypto++. Would you like a code snippet?

Yes, please provide a code snippet for SHA-256.

Here's a simple example using OpenSSL:

#include <openssl/sha.h>
#include <iostream>
#include <iomanip>

void sha256(const std::string& input, unsigned char output[SHA256_DIGEST_LENGTH]) {
    SHA256(reinterpret_cast<const unsigned char*>(input.c_str()), input.size(), output);
}

int main() {
    std::string data = "Hello, World!";
    unsigned char hash[SHA256_DIGEST_LENGTH];
    sha256(data, hash);
    for (int i = 0; i < SHA256_DIGEST_LENGTH; i++) {
        std::cout << std::hex << std::setw(2) << std::setfill('0') << (int)hash[i];
    }
    return 0;
}

This will output the SHA-256 hash of "Hello, World!".