refactor(core): Centralize SSH Tunnel management (#9906)

Co-authored-by: Michael Kret <michael.k@radency.com>

packages/nodes-base/utils/constants.ts

@@ -1,2 +1,4 @@
 export const NODE_RAN_MULTIPLE_TIMES_WARNING =
 	"This node ran multiple times - once for each input item. You can change this by setting 'execute once' in the node settings. <a href='https://docs.n8n.io/flow-logic/looping/#executing-nodes-once' target='_blank'>More Info</a>";
+
+export const LOCALHOST = '127.0.0.1';

packages/nodes-base/utils/sshTunnel.properties.ts

@@ -0,0 +1,108 @@
+import type { INodeProperties } from 'n8n-workflow';
+
+export const sshTunnelProperties: INodeProperties[] = [
+	{
+		displayName: 'SSH Tunnel',
+		name: 'sshTunnel',
+		type: 'boolean',
+		default: false,
+	},
+	{
+		displayName: 'SSH Authenticate with',
+		name: 'sshAuthenticateWith',
+		type: 'options',
+		default: 'password',
+		options: [
+			{
+				name: 'Password',
+				value: 'password',
+			},
+			{
+				name: 'Private Key',
+				value: 'privateKey',
+			},
+		],
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+			},
+		},
+	},
+	{
+		displayName: 'SSH Host',
+		name: 'sshHost',
+		type: 'string',
+		default: 'localhost',
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+			},
+		},
+	},
+	{
+		displayName: 'SSH Port',
+		name: 'sshPort',
+		type: 'number',
+		default: 22,
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+			},
+		},
+	},
+	{
+		displayName: 'SSH User',
+		name: 'sshUser',
+		type: 'string',
+		default: 'root',
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+			},
+		},
+	},
+	{
+		displayName: 'SSH Password',
+		name: 'sshPassword',
+		type: 'string',
+		typeOptions: {
+			password: true,
+		},
+		default: '',
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+				sshAuthenticateWith: ['password'],
+			},
+		},
+	},
+	{
+		displayName: 'Private Key',
+		name: 'sshPrivateKey',
+		type: 'string',
+		typeOptions: {
+			rows: 4,
+			password: true,
+		},
+		default: '',
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+				sshAuthenticateWith: ['privateKey'],
+			},
+		},
+	},
+	{
+		displayName: 'Passphrase',
+		name: 'sshPassphrase',
+		type: 'string',
+		default: '',
+		description: 'Passphrase used to create the key, if no passphrase was used leave empty',
+		displayOptions: {
+			show: {
+				sshTunnel: [true],
+				sshAuthenticateWith: ['privateKey'],
+			},
+		},
+	},
+];