<!DOCTYPE html>
<script src="include.js"></script>
<script>
asyncTest(async done => {
var subtle = self.crypto.subtle;
var key = await subtle.importKey("raw", new Uint8Array([]), { name: "HKDF" }, false, [
"deriveKey",
"deriveBits",
]);
// Test the subtle difference between an empty salt (0 bytes) and an absent salt (which defaults to hashLen many bytes, each of value 0).
// Inspired by https://datatracker.ietf.org/doc/html/rfc5869/#appendix-A.6 and A.7
var algorithmEmptySalt = {
name: "HKDF",
salt: new Uint8Array([]),
info: new Uint8Array([]),
hash: "SHA-1",
};
var bitsEmptySalt = await subtle.deriveBits(algorithmEmptySalt, key, 42 * 8);
console.log(new Uint8Array(bitsEmptySalt));
println(new Uint8Array(bitsEmptySalt));
var algorithmAbsentSalt = {
name: "HKDF",
salt: null,
info: new Uint8Array([]),
hash: "SHA-1",
};
subtle.deriveBits(algorithmAbsentSalt, key, 42 * 8).then(
async bitsAbsentSalt => {
println(new Uint8Array(bitsAbsentSalt));
done();
},
async err => {
println("Absent salt rejected! " + err);
done();
}
);
});
</script>
