Dart

Load an SSH Key from a File (Many Formats Supported)

Demonstrates how to load an SSH public or private key object from a file. The file can be in any of the following formats:

• OpenSSH private key
• OpenSSH public key
• PuTTY private key
• RFC 4716 public key

Dart

import 'package:chilkat/chilkat.dart';

void main() {
  final sshkey = CkSshKey();

  // First, use the LoadText convenience method to load a text file (of any SSH key format)
  // into a string:
  final strKey = sshkey.loadText('../mySshKeys/myKey.txt');

  // Next, load the key into the SSH key object.

  // If the key is an OpenSSH private key:
  // (In actuality, the From* methods will automatically detect the format and load
  // the key correctly.  For example, if a PuTTY private key is passed to FromOpenSshPrivateKey,
  // it  will still load correctly.)
  try {
    sshkey.fromOpenSshPrivateKey(strKey);
    print('Loaded OpenSSH private key.');
    return;
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }

  // If the key is an OpenSSH public key:
  try {
    sshkey.fromOpenSshPublicKey(strKey);
    print('Loaded OpenSSH public key.');
    return;
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }

  // If the key is a PuTTY private key:
  try {
    sshkey.fromPuttyPrivateKey(strKey);
    print('Loaded PuTTY private key.');
    return;
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }

  // If the key is an RFC 4716 public key:
  try {
    sshkey.fromRfc4716PublicKey(strKey);
    print('Loaded RFC 4716 public key.');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }
}