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new sjcl.test.TestCase("HMAC official test vectors", function (cb) {
if (!sjcl.misc.hmac || !sjcl.hash.sha256) {
this.unimplemented();
cb && cb();
return;
}
var i, kat = sjcl.test.vector.hmac, tv, h=sjcl.codec.hex, out, data, mac;
for (i=0; i<kat.length; i++) {
tv = kat[i];
data = h.toBits(tv.data);
mac = new sjcl.misc.hmac(h.toBits(tv.key));
out = h.fromBits(mac.mac(data));
this.require (out.substr(0,tv.mac.length) == tv.mac, "hmac #"+i);
out = h.fromBits(mac.mac(data));
this.require (out.substr(0,tv.mac.length) == tv.mac, "hmac reset #"+i);
mac.update(sjcl.bitArray.bitSlice(data, 0, sjcl.bitArray.bitLength(data)/2));
mac.update(sjcl.bitArray.bitSlice(data, sjcl.bitArray.bitLength(data)/2));
out = h.fromBits(mac.digest());
this.require (out.substr(0,tv.mac.length) == tv.mac, "hmac reset #"+i);
}
cb && cb();
});
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