stegano.html

stagnography using javascript its powerful

	
	var cgrng = new LEcuyer(0xbadf00d);
	for (i = 0; i < b.length; i++) {
	   var r = cgrng.nextInt(23);
	   armour_cg_outletter(String.fromCharCode(charBase + ((((b[i] >> 4) & 0xF)) + r) % 24));
	   r = cgrng.nextInt(23);
	   armour_cg_outletter(String.fromCharCode(charBase + ((((b[i] & 0xF)) + r) % 24)));
	}
	delete cgrng;
	
	while (acgg.length < 5) {
	    armour_cg_outletter("Z");
	}
	armour_cg_outgroup();
	
	acgg = "YYYYY";
	armour_cg_outgroup();
	
	acgt += acgcl + "\n";
	
	return acgt;
    }
    
    var dcgs, dcgi;
    
    function disarm_cg_insig() {
    	while (dcgi < dcgs.length) {
	    var c = dcgs.charAt(dcgi++).toUpperCase();
	    if ((c >= "A") && (c <= "Z")) {
	    	return c;
    	    }
    	}
	return "";
    }
    
    function disarm_codegroup(s) {
    	var b = new Array();
	var nz = 0, ba, bal = 0, c;
	
    	dcgs = s;
	dcgi = 0;
	
	while (nz < 5) {
	    c = disarm_cg_insig();
	    
	    if (c == "Z") {
	    	nz++;
	    } else if (c == "") {
	    	nz = 0;
	    	break;
	    } else {
	    	nz = 0;
	    }
    	}
	
	if (nz == 0) {
	    alert("No codegroup starting symbol found in message.");
	    return "";
	}
	
	var charBase = ("A").charCodeAt(0);    
	var cgrng = new LEcuyer(0xbadf00d);
	for (nz = 0; nz < 2; ) {
	    c = disarm_cg_insig();
	    
	    if ((c == "Y") || (c == "")) {
	    	break;
	    } else if (c != "Z") {
	    	var r = cgrng.nextInt(23);
	    	var n = c.charCodeAt(0) - charBase;
		n = (n + (24 - r)) % 24;
		if (nz == 0) {
		    ba = (n << 4);
		    nz++;