Smtp server (#923)

* Email Mta Node added security and authentication

* Documentation updated

* Original formatting restored

social/email/61-email.html

@@ -306,7 +306,47 @@
 <script type="text/html" data-template-name="e-mail mta">
     <div class="form-row">
         <label for="node-input-port"><i class="fa fa-random"></i> <span data-i18n="email.label.port"></span></label>
-        <input type="text" id="node-input-port" style="width:70%;"/>
+        <input type="text" id="node-input-port" style="width:100px">
+        <label style="width:40px"> </label>
+        <input type="checkbox" id="node-input-secure" style="display:inline-block; width:20px; vertical-align:baseline;">
+        <span data-i18n="email.label.enableSecure"></span>
+    </div>  
+    <div class="form-row">
+        <label for="node-input-starttls"><i class="fa fa-lock"></i> <span data-i18n="email.label.enableStarttls"></span></label>
+        <input type="checkbox" id="node-input-starttls" style="display:inline-block; width:20px; vertical-align:baseline;">
+        <span data-i18n="email.label.starttlsUpgrade"></span>
+    </div>     
+    <div class="form-row">
+        <label for="node-input-certFile"><i class="fa fa-file"></i>
+        <span data-i18n="email.label.certFile"></span></label>
+        <input type="text" id="node-input-certFile" placeholder="server.crt" style="width:100%">
+    </div>  
+    <div class="form-row">
+        <label for="node-input-keyFile"><i class="fa fa-key"></i>
+        <span data-i18n="email.label.keyFile"></span></label>
+        <input type="text" id="node-input-keyFile" placeholder="private.key" style="width:100%">
+    </div>       
+    <div class="form-row">
+        <label for="node-input-auth"><i class="fa fa-user"></i> <span data-i18n="email.label.users"></span></label>
+        <label style="width:144px"> </label>
+        <input type="checkbox" id="node-input-auth" style="display:inline-block; width:20px; vertical-align:baseline;">
+        <span data-i18n="email.label.auth"></span>
+    </div>
+    <div class="form-row node-input-email-users-container-row" style="margin-bottom: 0px;">
+        <div id="node-input-email-users-container-div" style="box-sizing: border-box; border-radius: 5px;
+                height: 200px; padding: 5px; border: 1px solid #ccc; overflow-y:scroll;">
+            <ol id="node-input-email-users-container" style="list-style-type:none; margin: 0;"></ol>
+        </div>
+    </div>
+    <div class="form-row">
+        <a href="#" class="editor-button editor-button-small" id="node-input-email-users-add" style="margin-top: 4px;">
+            <i class="fa fa-plus"></i>
+            <span data-i18n="email.label.addButton"></span>
+        </a>
+    </div>
+    <div class="form-row">
+        <label for="node-input-expert"><i class="fa fa-cog"></i> <span data-i18n="email.label.expert"></span></label>
+        <input type="text" id="node-input-expert">
     </div>     
     <div class="form-row">
         <label for="node-input-name"><i class="fa fa-tag"></i> <span data-i18n="node-red:common.label.name"></span></label>
@@ -321,7 +361,14 @@
         color: "#c7e9c0",
         defaults: {
             name: { value: "" },
-            port: {value:"1025",required:true},
+            port: { value: "1025", required: true, validate: RED.validators.number() },
+            secure: { value: false },
+            starttls: { value: false },
+            certFile: { value: "" },
+            keyFile: { value: "" },
+            users: { value: [] },
+            auth: { value: false },
+            expert: { value: '{"logger":false}' }
         },
         inputs: 0,
         outputs: 1,
@@ -332,6 +379,104 @@
         },
         labelStyle: function () {
             return this.name ? "node_label_italic" : "";
+        },
+        oneditprepare: function () {
+            let node = this;
+            // Expert settings
+            $("#node-input-expert").typedInput({
+                type: "json",
+                types: ["json"]
+            })
+            // User Management
+            let cacheItemCount = 0;
+            if (node.users && node.users.length > 0) {
+                cacheItemCount = node.users.length;
+                node.users.forEach(function (element, index, array) {
+                    generateUserEntry(element, index);
+                });
+            }
+            function generateUserEntry(user, id) {
+                let container = $("<li/>", {
+                    style: "background: #fefefe; margin:0; padding:8px 0px; border-bottom: 1px solid #ccc;"
+                });
+                let row = $('<div id="row' + id + '"/>').appendTo(container);
+
+                $('<i style="color: #eee; cursor: move;" class="node-input-email-users-handle fa fa-bars"></i>').appendTo(row);
+
+                let userField = $("<input/>", {
+                    id: "node-input-email-users-name" + id,
+                    class: "userName",
+                    type: "text",
+                    style: "margin-left:5px;width:100px;",
+                    placeholder: "name"
+                }).appendTo(row);
+
+                let passwordField = $("<input/>", {
+                    id: "node-input-email-users-password" + id,
+                    class: "userPassword",
+                    type: "password",
+                    style: "margin: 0 auto;width:50%;min-width:20px;margin-left:5px",
+                    placeholder: "password"
+                }).appendTo(row);
+
+                userField.val(user.name);
+                passwordField.val(user.password);
+
+                let finalspan = $("<span/>", {
+                    style: "float: right;margin-right: 10px;"
+                }).appendTo(row);
+
+                let removeUserButton = $("<a/>", {
+                    href: "#",
+                    id: "node-button-user-remove" + id,
+                    class: "editor-button editor-button-small",
+                    style: "margin-top: 7px; margin-left: 5px;"
+                }).appendTo(finalspan);
+
+                $("<i/>", { class: "fa fa-remove" }).appendTo(removeUserButton);
+
+                removeUserButton.click(function () {
+                    container.css({ background: "#fee" });
+                    container.fadeOut(300, function () {
+                        $(this).remove();
+                    });
+                });
+
+                $("#node-input-email-users-container").append(container);
+            }
+
+            $("#node-input-email-users-container").sortable({
+                axis: "y",
+                handle: ".node-input-email-users-handle",
+                cursor: "move"
+            });
+
+            $("#node-input-email-users-container .node-input-email-users-handle").disableSelection();
+
+            $("#node-input-email-users-add").click(function () {
+                if (!cacheItemCount || cacheItemCount < 0) {
+                    cacheItemCount = 0;
+                }
+                generateUserEntry({ name: "", password: "" }, cacheItemCount++);
+                $("#node-input-email-users-container-div").scrollTop(
+                    $("#node-input-email-users-container-div").get(0).scrollHeight
+                );
+            });
+        },
+        oneditsave: function () {
+            let node = this;
+            let cacheUsers = $("#node-input-email-users-container").children();
+            node.users = [];
+            cacheUsers.each(function () {
+                node.users.push({
+                    name: $(this)
+                        .find(".userName")
+                        .val(),
+                    password: $(this)
+                        .find(".userPassword")
+                        .val()
+                });
+            });
         }
     });
 </script>

social/email/61-email.js

@@ -19,6 +19,7 @@ module.exports = function(RED) {
     var simpleParser = require("mailparser").simpleParser;
     var SMTPServer = require("smtp-server").SMTPServer;
     //var microMTA = require("micromta").microMTA;
+    var fs = require('fs');
 
     if (parseInt(process.version.split("v")[1].split(".")[0]) < 8) {
         throw "Error : Requires nodejs version >= 8.";
@@ -567,14 +568,36 @@ module.exports = function(RED) {
     function EmailMtaNode(n) {
         RED.nodes.createNode(this, n);
         this.port = n.port;
+        this.secure = n.secure;
+        this.starttls = n.starttls;
+        this.certFile = n.certFile;
+        this.keyFile = n.keyFile;
+        this.users = n.users;
+        this.auth = n.auth;
+        try {
+            this.options = JSON.parse(n.expert);
+        } catch (error) {
+            this.options = {};
+        }
         var node = this;
+        if (!Array.isArray(node.options.disabledCommands)) {
+            node.options.disabledCommands = [];
+        }
+        node.options.secure = node.secure;
+        if (node.certFile) {
+            node.options.cert = fs.readFileSync(node.certFile);
+        }
+        if (node.keyFile) {
+            node.options.key = fs.readFileSync(node.keyFile);
+        }
+        if (!node.starttls) {
+            node.options.disabledCommands.push("STARTTLS");
+        }
+        if (!node.auth) {
+            node.options.disabledCommands.push("AUTH");
+        }
 
-        node.mta = new SMTPServer({
+        node.options.onData = function (stream, session, callback) {
-            secure: false,
-            logger: false,
-            disabledCommands: ['AUTH', 'STARTTLS'],
-
-            onData: function (stream, session, callback) {
             simpleParser(stream, { skipTextToHtml:true, skipTextLinks:true }, (err, parsed) => {
                 if (err) { node.error(RED._("email.errors.parsefail"),err); }
                 else {
@@ -605,7 +628,19 @@ module.exports = function(RED) {
                 callback();
             });
         }
+
+        node.options.onAuth = function (auth, session, callback) {
+            let id = node.users.findIndex(function (item) {
+                return item.name === auth.username;
             });
+            if (id >= 0 && node.users[id].password === auth.password) {
+                callback(null, { user: id + 1 });
+            } else {
+                callback(new Error("Invalid username or password"));
+            }
+        }
+
+        node.mta = new SMTPServer(node.options);
 
         node.mta.listen(node.port);
 

social/email/locales/en-US/61-email.html

@@ -58,11 +58,19 @@
 
 <script type="text/html" data-help-name="e-mail mta">
     <p>Mail Transfer Agent - listens on a port for incoming SMTP mails.</p>
-    <p><b>Note</b>: "NOT for production use" as there is no security built in.
+    <p><b>Note</b>: Default configuration is "NOT for production use" as security is not enabled.
     This is primarily for local testing of outbound mail sending, but could be used
     as a mail forwarder to a real email service if required.</p>
     <p>To use ports below 1024, for example 25 or 465, you may need to get privileged access.
     On linux systems this can be done by running
     <pre>sudo setcap 'cap_net_bind_service=+eip' $(which node)</pre>
     and restarting Node-RED. Be aware - this gives all node applications access to all ports.</p>
+    <h3>Security</h3>
+    <p>When <i>Secure connection</i> is checked, the connection will use TLS. 
+    If not it is still possible to upgrade clear text socket to TLS socket by checking <i>Start TLS</i>.
+    If you do no specify your own certificate (path to file) then a pregenerated self-signed certificate is used. Any respectful client refuses to accept such certificate.</p>
+    <h3>Authentication</h3>
+    <p>Authentication can be enabled (PLAIN or LOGIN). Add at least one user.</p>
+    <h3>Expert</h3>
+    <p>All options as described in <a href="https://nodemailer.com/extras/smtp-server/" target="_new">nodemailer SMTP server</a> can be made here.</p>    
 </script>

social/email/locales/en-US/61-email.json

@@ -34,7 +34,16 @@
             "never": "never",
             "required": "if required",
             "always": "always",
-            "rejectUnauthorised": "Check server certificate is valid"
+            "rejectUnauthorised": "Check server certificate is valid",
+            "enableSecure": "Secure connection",
+            "enableStarttls": "Start TLS",
+            "starttlsUpgrade": "Upgrade cleartext connection with STARTTLS",
+            "certFile": "Certificate",
+            "keyFile":"Private key",
+            "users": "Users",
+            "auth": "Authenticate users",
+            "addButton": "Add",   
+            "expert": "Expert"
         },
         "default-message": "__description__\n\nFile from Node-RED is attached: __filename__",
         "tip": {