var password = require('crypto-password-helper');

// Using default configuration
password.encrypt(plainPassword).then(hash => {          // using default settings
    console.log(hash);                                  // save hash to user/database
}).catch(err => { throw err; });                        // handle internal server error. (crypto error)

// Using your own configuration
password.encrypt(plainPassword, config).then(hash => {  // using your own configuration
    console.log(hash);
}).catch(err => { throw err; });                        // handle internal server error. (crypto error)

// Generate password-hash synchronous. (with options) - throws on error
let hash = password.encryptSync(plainPassword, options);           

// Generate password-hash synchronous. (without options) - throws on error
let hash = password.encryptSync(plainPassword);

// Check if password match
password.compare(plainPassword, hashedPassword).then(isMatch => {
    if(isMatch) {                                       // isMatch is true if the plainPassword matches the hashedPassword, otherwise false.
        login();
    } else {
        unauthorized();
    }
}).catch(err => { throw err; });                        // Handle internal server error. (crypto error)

// Compare synchronous. (Throws on error)
let isMatch = password.compareSync(plainPassword, hashedPassword);

let defaults = {
    // Number of iterations (higher number -> more secure but takes longer time to complete.)
    iterations: 612484,

    // Number of bytes for the password hash.
    hashSize: 32,

    // Number of bytes for the password salt.
    saltSize: 16,

    // The digest used to hash the password. See list of digests for crypto.
    digest: 'sha512'
}