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background.js
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background.js
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var password = null;
var passwordWasSet = false;
// Handle requests for passwords
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
if (request.type === 'request_password') {
requestPassword(function (passwordWasSet) {
sendResponse(passwordWasSet);
});
}
if (request.type === 'encrypt') {
var encryptFunction = function () {
if (password != null) {
var encryptedText = encrypt(request.text);
sendResponse({encryptedText: encryptedText});
} else {
sendResponse();
}
};
if (password == null) {
requestPassword(encryptFunction);
} else {
encryptFunction();
}
}
if (request.type === 'decrypt') {
var decryptFunction = function () {
if (password != null) {
var decryptedText = decrypt(request.text);
sendResponse({decryptedText: decryptedText});
} else {
sendResponse();
}
};
if (password == null) {
requestPassword(decryptFunction);
} else {
decryptFunction();
}
}
return true;
});
function requestPassword(callback) {
chrome.tabs.create({
url: chrome.extension.getURL('dialog.html'),
active: false
}, function(tab) {
var windowId = chrome.windows.create({
tabId: tab.id,
type: 'popup',
width: 300,
height: 70,
focused: true
});
passwordWasSet = false;
chrome.windows.onRemoved.addListener(function (windowId) {
callback(passwordWasSet);
});
});
}
function setPassword(newPassword) {
password = newPassword;
passwordWasSet = true;
};
function encrypt(text) {
return Constants.marker + CryptoJS.AES.encrypt(text, password);
}
function decrypt(text) {
try {
text = text.replace(Constants.marker, '');
return CryptoJS.AES.decrypt(text, password).toString(CryptoJS.enc.Utf8);
} catch (e) {
return;
}
}