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/* jsaccess - download and decrypt files in the browser
* 2013, Laurent Ghigonis <laurent@gouloum.fr> */
/* Reference code */
//console.log(JSON.stringify(xhr));
/* ===== PUBLIC - called by html ===== */
/* Called on "body" load */
function jsainit() {
}
/* Called on "Get files list" click */
function jsagetlist() {
var pass = document.getElementById('password').value;
var RMD160 = new Hashes.RMD160;
var hash = RMD160.hex(pass);
_status("Getting file list ...");
listreq = $.ajax({
url: 'files/' + hash + '/index.txt',
beforeSend: function ( xhr ) {
xhr.overrideMimeType("application/base64");
},
success: function ( data ) {
_status("We have file list");
_showfiles(data, pass, hash);
},
error: function (xhr, opts, err) {
_status("Bad password");
throw(err);
}
});
}
/* Called on "Download" click */
function jsadl() {
var pass = document.getElementById('password').value;
var file = $('input[name=file]:checked').val();
obj = _dl(file, pass);
}
/* ===== PRIVATE - called within this javascript file ===== */
function _showfiles(data, pass, hash) {
try {
var decrypted = GibberishAES.dec(data, pass);
} catch(err) {
_status(err.toString());
throw err;
}
document.getElementById('files').innerHTML = "";
lines = decrypted.split("\n").filter(function(n){return n});
$.each(lines,
function( idx, obj ){
obj = obj.trim();
var btn = $('<input type="radio" name="file" value="'+obj+'"/>'+obj+'<br/>');
btn.appendTo('#files');
});
}
function _dl(file, pass) {
var RMD160 = new Hashes.RMD160;
var dirhash = RMD160.hex(pass);
var path = 'files/' + dirhash + '/' + RMD160.hex(dirhash + file);
_status("Downloading \""+file+"\" ...");
dlreq = $.ajax({
url: path,
beforeSend: function ( xhr ) {
xhr.overrideMimeType("application/base64");
},
success: function ( data ) {
_status("Download complete, decrypting ...");
_decrypt(data, pass, file);
},
error: function (xhr, opts, err) {
_status("Dowload failed (status="+xhr.status+")");
throw(err);
}
});
}
function _decrypt(obj, pass, name) {
try {
var decrypted = GibberishAES.dec(obj, pass);
} catch(err) {
_status(err.toString());
throw err;
}
out = $.base64.decode(decrypted.toString());
_status("Decrypted successfuly, saving ...");
_save(out, name);
}
function _save(obj, name) {
var ab = new ArrayBuffer(obj.length);
var ia = new Uint8Array(ab);
for (var i = 0; i < obj.length; i++) {
ia[i] = obj.charCodeAt(i);
}
var blob = new Blob([ia], {type:"application/octet-binary"});
saveAs(blob, name);
_status("File \""+name+"\" saved.");
_status("Have a good day.");
}
function _status(txt) {
var div = document.getElementById('status');
div.innerHTML = div.innerHTML + '<br/>' + txt;
}
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