74 lines
2.2 KiB
TypeScript
74 lines
2.2 KiB
TypeScript
/* Browser Crypto Shims */
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import { hmac } from "@noble/hashes/hmac";
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import { pbkdf2 } from "@noble/hashes/pbkdf2";
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import { sha256 } from "@noble/hashes/sha256";
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import { sha512 } from "@noble/hashes/sha512";
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import { throwArgumentError, throwError } from "../utils/index.js";
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declare global {
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interface Window { }
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const window: Window;
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const self: Window;
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}
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function getGlobal(): any {
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if (typeof self !== 'undefined') { return self; }
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if (typeof window !== 'undefined') { return window; }
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if (typeof global !== 'undefined') { return global; }
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throw new Error('unable to locate global object');
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};
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const anyGlobal = getGlobal();
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const crypto: any = anyGlobal.crypto || anyGlobal.msCrypto;
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export interface CryptoHasher {
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update(data: Uint8Array): CryptoHasher;
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digest(): Uint8Array;
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}
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export function createHash(algo: string): CryptoHasher {
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switch (algo) {
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case "sha256": return sha256.create();
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case "sha512": return sha512.create();
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}
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return throwArgumentError("invalid hashing algorithm name", "algorithm", algo);
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}
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export function createHmac(_algo: string, key: Uint8Array): CryptoHasher {
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const algo = ({ sha256, sha512 }[_algo]);
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if (algo == null) {
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return throwArgumentError("invalid hmac algorithm", "algorithm", _algo);
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}
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return hmac.create(algo, key);
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}
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export function pbkdf2Sync(password: Uint8Array, salt: Uint8Array, iterations: number, keylen: number, _algo: "sha256" | "sha512"): Uint8Array {
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const algo = ({ sha256, sha512 }[_algo]);
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if (algo == null) {
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return throwArgumentError("invalid pbkdf2 algorithm", "algorithm", _algo);
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}
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return pbkdf2(algo, password, salt, { c: iterations, dkLen: keylen });
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}
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export function randomBytes(length: number): Uint8Array {
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if (crypto == null) {
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return throwError("platform does not support secure random numbers", "UNSUPPORTED_OPERATION", {
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operation: "randomBytes"
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});
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}
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if (!Number.isInteger(length) || length <= 0 || length > 1024) {
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throwArgumentError("invalid length", "length", length);
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}
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const result = new Uint8Array(length);
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crypto.getRandomValues(result);
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return result;
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}
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