@hazae41/kdbx/out/mods/kdbx/hmac/mod.js

Rust-like KeePass (KDBX 4) file format for TypeScript

import { Writable } from "@hazae41/binary";
export class PreHmacKey {
    index;
    major;
    constructor(index, major) {
        this.index = index;
        this.major = major;
    }
    sizeOrThrow() {
        return 8 + this.major.bytes.length;
    }
    writeOrThrow(cursor) {
        cursor.writeBigUint64OrThrow(this.index, true);
        cursor.writeOrThrow(this.major.bytes);
    }
    async digestOrThrow() {
        const bytes = Writable.writeToBytesOrThrow(this);
        const digest = new Uint8Array(await crypto.subtle.digest("SHA-512", bytes));
        const key = await crypto.subtle.importKey("raw", digest, { name: "HMAC", hash: "SHA-256" }, true, ["sign", "verify"]);
        return new HmacKey(key);
    }
}
export class HmacKey {
    key;
    constructor(key) {
        this.key = key;
    }
    async signOrThrow(data) {
        return new Uint8Array(await crypto.subtle.sign("HMAC", this.key, data));
    }
    async verifyOrThrow(data, signature) {
        const result = await crypto.subtle.verify("HMAC", this.key, signature, data);
        if (result !== true)
            throw new Error();
        return;
    }
}