Titanium, alternative base64encode function; not the author, sorry I don't recall the original source for this; also untested in recent Ti versions

base64EncodeAscii.js

// alternative to built-in base64 encode function, which has outstanding bugs
// alternatively, use:
// String(Ti.Utils.base64encode(theBlob)).replace(/(\r\n|\n|\r)/gm,"");
function Base64EncodeAscii(str) {
	if (/([^\u0000-\u00ff])/.test(str)) {
		throw 'String must be ASCII';
	}
	var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	var o1,
		o2,
		o3,
		bits,
		h1,
		h2,
		h3,
		h4,
		e = [],
		pad = '',
		c;
	c = str.length % 3;
	// pad string to length of multiple of 3
	if (c > 0) {
		while (c++ < 3) {
			pad += '=';
			str += '\0';
		}
	}
	// note: doing padding here saves us doing special-case packing for trailing 1 or 2 chars
	
	for (c = 0; c < str.length; c += 3) { // pack three octets into four hexets
		o1 = str.charCodeAt(c);
		o2 = str.charCodeAt(c + 1);
		o3 = str.charCodeAt(c + 2);
		bits = o1 << 16 | o2 << 8 | o3;
		h1 = bits >> 18 & 0x3f;
		h2 = bits >> 12 & 0x3f;
		h3 = bits >> 6 & 0x3f;
		h4 = bits & 0x3f;
		// use hextets to index into code string
		e[c / 3] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
	}
	str = e.join('');
	// use Array.join() for better performance than repeated string appends

	// replace 'A's from padded nulls with '='s
	str = str.slice(0, str.length - pad.length) + pad;
	return str;
}