MySsh

A simple SSH2 wrapper to simplify SSH connections in TypeScript/JavaScript.

Installation

# Using pnpm
pnpm add @rnatsuki/myssh

# Using npm
npm install @rnatsuki/myssh

# Using yarn
yarn add @rnatsuki/myssh

Features

• Simple API for SSH operations
• Support for password and key-based authentication
• Automatic retry mechanism
• File upload/download via SFTP
• Interactive shell support
• TypeScript type definitions
• Support for SSH options (like -o StrictHostKeyChecking=no)

Quick Examples

Disable Host Key Checking (Equivalent to Command Line SSH)

// Equivalent to:
// ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no user@host
const ssh = new MySsh({
  host: 'example.com',
  username: 'user',
  password: 'password',

  // These two options disable host key checking
  disableStrictHostKeyChecking: true,
  ignoreKnownHosts: true
});

await ssh.connect();
const result = await ssh.exec('hostname');
console.log(result.stdout);
ssh.disconnect();

Usage

Basic Connection

import { MySsh } from 'myssh';

const ssh = new MySsh({
  host: 'example.com',
  port: 22,
  username: 'user',
  password: 'password'
});

// Connect to the server
await ssh.connect();

// Execute a command
const result = await ssh.exec('ls -la');
console.log(`Exit code: ${result.code}`);
console.log(`Output: ${result.stdout}`);

// Disconnect
ssh.disconnect();

Using Key-based Authentication

import { MySsh } from 'myssh';
import * as fs from 'fs';

const ssh = new MySsh({
  host: 'example.com',
  username: 'user',
  privateKey: fs.readFileSync('/path/to/private/key')
});

await ssh.connect();
// ...

Using Default Key (~/.ssh/id_rsa)

const ssh = new MySsh({
  host: 'example.com',
  username: 'user',
  useDefaultKey: true // Will use ~/.ssh/id_rsa automatically
});

File Transfer (SFTP)

// Upload a file
await ssh.uploadFile('./local/file.txt', '/remote/path/file.txt');

// Download a file
await ssh.downloadFile('/remote/path/remote-file.txt', './local-file.txt');

Interactive Shell

const stream = await ssh.shell();

// Handle data from the shell
stream.on('data', (data) => {
  console.log('SHELL OUTPUT:', data.toString());
});

// Send commands to the shell
stream.write('ls -la\n');

// Close the shell when done
stream.close();

Advanced Options

const ssh = new MySsh({
  host: 'example.com',
  username: 'user',
  password: 'password',

  // Connection settings
  timeout: 5000,       // Connection timeout in ms (default: 10000)
  retries: 3,          // Number of retries on connection failure (default: 0)
  retryDelay: 1000,    // Delay between retries in ms (default: 2000)

  // Logging
  logger: console.log,  // Custom logger function

  // SSH options (similar to command-line -o options)
  disableStrictHostKeyChecking: true,  // Equivalent to -o StrictHostKeyChecking=no
  ignoreKnownHosts: true,              // Equivalent to -o UserKnownHostsFile=/dev/null

  // Custom SSH options
  sshOptions: {
    "ServerAliveInterval": "60",      // Keep connection alive
    "ServerAliveCountMax": "3"
  }
});

Command-line Equivalent

The configuration above is equivalent to the following command-line SSH command:

ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ServerAliveInterval=60 -o ServerAliveCountMax=3 user@example.com

API Reference

MySsh(config: MySshConfig)

Creates a new SSH client instance.

Configuration Options

Option	Type	Description
host	string	Hostname or IP address (default: 'localhost')
port	number	Port number (default: 22)
username	string	SSH username
password	string	SSH password (optional)
privateKey	string | Buffer	Private key for authentication (optional)
useDefaultKey	boolean	Use ~/.ssh/id_rsa if available (default: false)
timeout	number	Connection timeout in ms (default: 10000)
retries	number	Number of connection retries (default: 0)
retryDelay	number	Delay between retries in ms (default: 2000)
logger	function	Custom logging function (optional)
disableStrictHostKeyChecking	boolean	Skip host key verification (equivalent to -o StrictHostKeyChecking=no)
ignoreKnownHosts	boolean	Don't use known_hosts file (equivalent to -o UserKnownHostsFile=/dev/null)
sshOptions	object	Custom SSH options as key-value pairs (equivalent to -o options)

Methods

• connect(): Connect to the SSH server
• exec(command: string): Execute a command and return result
• uploadFile(src: string, dest: string): Upload a file via SFTP
• downloadFile(src: string, dest: string): Download a file via SFTP
• shell(): Get an interactive shell
• disconnect(): Close the SSH connection

License

ISC