(Node.js) Manually Duplicate SetSecretKeyViaPassword

Demonstrates how to duplicate the password string to binary secret key computation of SetSecretKeyViaPassword.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var crypt = new chilkat.Crypt2();

    // The password string is transformed to a binary secret key by computing the 
    // MD5 digest (of the utf-8 password) to obtain 16 bytes.  
    // If the KeyLength is greater than 16 bytes, then the MD5 digest of the Base64 encoding 
    // of the utf-8 password is added.  A max of 32 bytes of key material is generated, and 
    // this is truncated to the actual KeyLength required.

    crypt.CryptAlgorithm = "aes";
    crypt.KeyLength = 256;

    var password = "this is my password";
    crypt.SetSecretKeyViaPassword(password);

    // Examine the resulting SecretKey in hex:
    console.log("Computed Secret Key = " + crypt.GetEncodedKey("hex"));

    // Now perform the same computation manually:
    var sb = new chilkat.StringBuilder();

    crypt.HashAlgorithm = "md5";
    crypt.Charset = "utf-8";
    crypt.EncodingMode = "hex";
    sb.Append(crypt.HashStringENC(password));

    var passwordBase64 = crypt.EncodeString(password,"utf-8","base64");
    sb.Append(crypt.HashStringENC(passwordBase64));

    console.log("Manually Computed = " + sb.GetAsString());

    // The output is:
    // Computed Secret Key = 210D53992DFF432EC1B1A9698AF9DA16C7E90518F90E24828F78EC9E0A413B36
    // Manually Computed = 210D53992DFF432EC1B1A9698AF9DA16C7E90518F90E24828F78EC9E0A413B36

}

chilkatExample();