47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
/*
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Copyright (C) 2013 Grégory Soutadé
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This file is part of gPass.
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gPass is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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gPass is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with gPass. If not, see <http://www.gnu.org/licenses/>.
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*/
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function hmac256(key, message) {
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var ipad = "";
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var opad = "";
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if (key.length > 512/8)
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{
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key = digest256(key);
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}
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for(i=0; i<512/8; i++)
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{
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if (i >= key.length)
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{
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ipad += String.fromCharCode(0x36);
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opad += String.fromCharCode(0x5c);
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}
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else
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{
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ipad += String.fromCharCode(key.charCodeAt(i) ^ 0x36);
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opad += String.fromCharCode(key.charCodeAt(i) ^ 0x5c);
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}
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}
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result = digest256(opad + digest256(ipad + message));
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return result;
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}
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