// SPDX-FileCopyrightText: Copyright Orangebot, Inc. and Medplum contributors
// SPDX-License-Identifier: Apache-2.0
import { arrayBufferToHex } from './utils';
/**
* Returns a cryptographically secure random string.
* @returns A cryptographically secure random string.
*/
export function getRandomString(): string {
const randomItems = new Uint32Array(28);
crypto.getRandomValues(randomItems);
return arrayBufferToHex(randomItems.buffer);
}
/**
* Encrypts a string with SHA256 encryption.
* @param str - The unencrypted input string.
* @returns The encrypted value in an ArrayBuffer.
*/
export async function encryptSHA256(str: string): Promise<ArrayBuffer> {
return crypto.subtle.digest('SHA-256', new TextEncoder().encode(str));
}
/**
* Cross platform random UUID generator
* Note that this is not intended for production use, but rather for testing
* This should be replaced when crypto.randomUUID is fully supported
* See: https://stackoverflow.com/revisions/2117523/28
* @returns A random UUID.
*/
export function generateId(): string {
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
const r = (Math.random() * 16) | 0;
const v = c === 'x' ? r : (r & 0x3) | 0x8;
return v.toString(16);
});
}
