(function(){
|
|
var C = (typeof window === 'undefined') ? require('./Crypto').Crypto : window.Crypto;
|
|
// Shortcuts
|
var util = C.util,
|
charenc = C.charenc,
|
UTF8 = charenc.UTF8,
|
Binary = charenc.Binary;
|
|
C.HMAC = function (hasher, message, key, options) {
|
|
// Convert to byte arrays
|
if (message.constructor == String) message = UTF8.stringToBytes(message);
|
if (key.constructor == String) key = UTF8.stringToBytes(key);
|
/* else, assume byte arrays already */
|
|
// Allow arbitrary length keys
|
if (key.length > hasher._blocksize * 4)
|
key = hasher(key, { asBytes: true });
|
|
// XOR keys with pad constants
|
var okey = key.slice(0),
|
ikey = key.slice(0);
|
for (var i = 0; i < hasher._blocksize * 4; i++) {
|
okey[i] ^= 0x5C;
|
ikey[i] ^= 0x36;
|
}
|
|
var hmacbytes = hasher(okey.concat(hasher(ikey.concat(message), { asBytes: true })), { asBytes: true });
|
|
return options && options.asBytes ? hmacbytes :
|
options && options.asString ? Binary.bytesToString(hmacbytes) :
|
util.bytesToHex(hmacbytes);
|
|
};
|
|
})();
|