React Native

SFTP Host Key Fingerprint

See more SFTP Examples

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

import { SFtp } from '@chilkat/react-native'

async function chilkatExample() {
  // This example assumes the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  const sftp = new SFtp();

  const hostname = 'sftp.example.com';
  const port = 22;
  try {
    await sftp.connectAsync(hostname, port);
  } catch {
    console.log(sftp.lastErrorText);
    return;
  }

  // Get the classic MD5 fingeprint
  const md5Fingerprint = sftp.hostKeyFingerprint;
  console.log(md5Fingerprint);

  // 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.)

  let includeKeyType = true;
  let includeHashName = true;
  let sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  console.log(sha256Fingerprint);

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

  // The key type and hash name can be optionally included or not.
  includeKeyType = false;
  includeHashName = true;
  sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  console.log(sha256Fingerprint);

  // SHA256:Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  includeKeyType = true;
  includeHashName = false;
  sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  console.log(sha256Fingerprint);

  // ssh-rsa Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=

  includeKeyType = false;
  includeHashName = false;
  sha256Fingerprint = sftp.getHostKeyFP('SHA256', includeKeyType, includeHashName);
  console.log(sha256Fingerprint);

  // Ufgj480OsdsCZRjj9sSNM6fpgIcSJ61RsIG8usndUIY=
}