$decryptedtext = openssl_decrypt($ciphertext, $cipher, $key, $options=0, $iv);
echo $decryptedtext; // Outputs 'Hello, world!'
##Hashing🗂
Unlike encryption, hashing is a one-way function. It translates plain text into a fixed-length string of characters. Here's a way to create a hash from a password in Node.js:
const bcrypt = require('bcrypt');
const password = 'supersecretpassword';
bcrypt.hash(password, 10, (err, hash) => {
console.log(hash);
});
To validate a password against a hash, you would do something like this:
bcrypt.compare(password, hash, (err, result) => {
if(result) {
console.log('Password is valid!');
} else {
console.log('Password is invalid!');
}
});
##SSL🔗
SSL, or Secure Sockets Layer, is a protocol that provides secure communications on the internet. It's often used to encrypt the connection between a web server and a browser. Here's a basic example of an SSL server using Node.js:
const https = require('https');
const fs = require('fs');
const options = {
key: fs.readFileSync('test/server.key'),
cert: fs.readFileSync('test/server.crt')
};
https.createServer(options, (req, res) => {
res.writeHead(200);
res.end('hello world\n');
}).listen(8000);
That's a broad overview of encryption, hashing, and SSL. If you'd like a deeper dive into these subjects, check out the links below. Keep in mind that these functions and methods can and do change, so it's always a good idea to check out the official documentation for the most up-to-date usage.
Stay secure and happy coding! 💻🔒
