@sebastianp265/safe-server-side-storage-client/crypto/key-derivation.js

Library for Confidential Server-Side Message Storage Using the Labyrinth Protocol

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.KEY_LENGTH_BYTES = void 0;
exports.kdfOneKey = kdfOneKey;
exports.kdfTwoKeys = kdfTwoKeys;
const sha256_1 = require("@noble/hashes/sha256");
const hkdf_1 = require("@noble/hashes/hkdf");
exports.KEY_LENGTH_BYTES = sha256_1.sha256.outputLen;
function kdfOneKey(ikm, salt, info, key_length = exports.KEY_LENGTH_BYTES) {
    return hkdfSHA256(ikm, salt, info, key_length);
}
function kdfTwoKeys(ikm, salt, info, first_key_length = exports.KEY_LENGTH_BYTES, second_key_length = exports.KEY_LENGTH_BYTES) {
    const full_key = hkdfSHA256(ikm, salt, info, first_key_length + second_key_length);
    return [
        full_key.subarray(0, first_key_length),
        full_key.subarray(first_key_length),
    ];
}
function hkdfSHA256(ikm, salt, info, keyLength) {
    return (0, hkdf_1.hkdf)(sha256_1.sha256, ikm, salt ?? new Uint8Array(0), info, keyLength);
}