gPass/firefox_addon/lib/hmac.js

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2015-01-21 18:56:32 +01:00
/*
Copyright (C) 2013 Grégory Soutadé
This file is part of gPass.
gPass is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
gPass is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with gPass. If not, see <http://www.gnu.org/licenses/>.
*/
var {Cc, Ci} = require("chrome");
var hmac = Cc["@mozilla.org/security/hmac;1"]
.createInstance(Ci.nsICryptoHMAC);
exports.hmac = {
hmac_init : function (key) {
var keyObject = Cc["@mozilla.org/security/keyobjectfactory;1"]
.getService(Ci.nsIKeyObjectFactory)
.keyFromString(Ci.nsIKeyObject.HMAC, key);
hmac.init(hmac.SHA256, keyObject);
},
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hmac_digest : function (message) {
var data = new Uint8Array(message.length);
for(i=0; i<message.length; i++)
data[i] = message.charCodeAt(i);
hmac.update(data, data.length);
res = hmac.finish(false);
hmac.reset();
return res;
}
};