Index: node_modules/nodemailer/lib/base64/index.js
===================================================================
--- node_modules/nodemailer/lib/base64/index.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/nodemailer/lib/base64/index.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,142 @@
+'use strict';
+
+const Transform = require('stream').Transform;
+
+/**
+ * Encodes a Buffer into a base64 encoded string
+ *
+ * @param {Buffer} buffer Buffer to convert
+ * @returns {String} base64 encoded string
+ */
+function encode(buffer) {
+    if (typeof buffer === 'string') {
+        buffer = Buffer.from(buffer, 'utf-8');
+    }
+
+    return buffer.toString('base64');
+}
+
+/**
+ * Adds soft line breaks to a base64 string
+ *
+ * @param {String} str base64 encoded string that might need line wrapping
+ * @param {Number} [lineLength=76] Maximum allowed length for a line
+ * @returns {String} Soft-wrapped base64 encoded string
+ */
+function wrap(str, lineLength) {
+    str = (str || '').toString();
+    lineLength = lineLength || 76;
+
+    if (str.length <= lineLength) {
+        return str;
+    }
+
+    let result = [];
+    let pos = 0;
+    let chunkLength = lineLength * 1024;
+    while (pos < str.length) {
+        let wrappedLines = str
+            .substr(pos, chunkLength)
+            .replace(new RegExp('.{' + lineLength + '}', 'g'), '$&\r\n')
+            .trim();
+        result.push(wrappedLines);
+        pos += chunkLength;
+    }
+
+    return result.join('\r\n').trim();
+}
+
+/**
+ * Creates a transform stream for encoding data to base64 encoding
+ *
+ * @constructor
+ * @param {Object} options Stream options
+ * @param {Number} [options.lineLength=76] Maximum length for lines, set to false to disable wrapping
+ */
+class Encoder extends Transform {
+    constructor(options) {
+        super();
+        // init Transform
+        this.options = options || {};
+
+        if (this.options.lineLength !== false) {
+            this.options.lineLength = this.options.lineLength || 76;
+        }
+
+        this._curLine = '';
+        this._remainingBytes = false;
+
+        this.inputBytes = 0;
+        this.outputBytes = 0;
+    }
+
+    _transform(chunk, encoding, done) {
+        if (encoding !== 'buffer') {
+            chunk = Buffer.from(chunk, encoding);
+        }
+
+        if (!chunk || !chunk.length) {
+            return setImmediate(done);
+        }
+
+        this.inputBytes += chunk.length;
+
+        if (this._remainingBytes && this._remainingBytes.length) {
+            chunk = Buffer.concat([this._remainingBytes, chunk], this._remainingBytes.length + chunk.length);
+            this._remainingBytes = false;
+        }
+
+        if (chunk.length % 3) {
+            this._remainingBytes = chunk.slice(chunk.length - (chunk.length % 3));
+            chunk = chunk.slice(0, chunk.length - (chunk.length % 3));
+        } else {
+            this._remainingBytes = false;
+        }
+
+        let b64 = this._curLine + encode(chunk);
+
+        if (this.options.lineLength) {
+            b64 = wrap(b64, this.options.lineLength);
+
+            // remove last line as it is still most probably incomplete
+            let lastLF = b64.lastIndexOf('\n');
+            if (lastLF < 0) {
+                this._curLine = b64;
+                b64 = '';
+            } else if (lastLF === b64.length - 1) {
+                this._curLine = '';
+            } else {
+                this._curLine = b64.substr(lastLF + 1);
+                b64 = b64.substr(0, lastLF + 1);
+            }
+        }
+
+        if (b64) {
+            this.outputBytes += b64.length;
+            this.push(Buffer.from(b64, 'ascii'));
+        }
+
+        setImmediate(done);
+    }
+
+    _flush(done) {
+        if (this._remainingBytes && this._remainingBytes.length) {
+            this._curLine += encode(this._remainingBytes);
+        }
+
+        if (this._curLine) {
+            this._curLine = wrap(this._curLine, this.options.lineLength);
+            this.outputBytes += this._curLine.length;
+            this.push(this._curLine, 'ascii');
+            this._curLine = '';
+        }
+        done();
+    }
+}
+
+// expose to the world
+module.exports = {
+    encode,
+    wrap,
+    Encoder
+};