(Node.js) SSH Host Key Fingerprint

See more SSH Examples

Demonstrates how to get the SSH server's host key fingerprint after connecting.

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

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

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

    var ssh = new chilkat.Ssh();

    var hostname = "ssh.example.com";
    var port = 22;
    var success = ssh.Connect(hostname,port);
    if (success !== true) {
        console.log(ssh.LastErrorText);
        return;
    }

    // Get the classic MD5 fingeprint
    var md5_fingerprint = ssh.HostKeyFingerprint;
    console.log(md5_fingerprint);

    // Sample output:
    // ssh-rsa 3072 21:b0:d8:41:4e:ef:78:10:20:af:01:b7:71:5d:eb:94

    // Starting in Chilkat v9.5.0.92, we can also get the SHA256 fingerprint.
    // (it is also possible to get fingerprints using other hash algorithms such as SHA384, SHA512, etc.)

    var includeKeyType = true;
    var includeHashName = true;
    var sha256_fingerprint = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
    console.log(sha256_fingerprint);

    // Sample output:
    // ssh-rsa SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    // The key type and hash name can be optionally included or not.
    includeKeyType = false;
    includeHashName = true;
    sha256_fingerprint = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
    console.log(sha256_fingerprint);

    // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = true;
    includeHashName = false;
    sha256_fingerprint = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
    console.log(sha256_fingerprint);

    // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

    includeKeyType = false;
    includeHashName = false;
    sha256_fingerprint = ssh.GetHostKeyFP("SHA256",includeKeyType,includeHashName);
    console.log(sha256_fingerprint);

    // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

}

chilkatExample();