rxdb
Version:
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
44 lines • 1.46 kB
JavaScript
import { newRxError } from "../../rx-error.js";
/**
* Cache this here so we do not have to run the try-catch
* each time for better performance.
* If your JavaScript runtime does not support crypto.subtle.digest,
* provide your own hash function when calling createRxDatabase().
*/
var hashFn;
function getHashFn() {
if (hashFn) {
return hashFn;
}
if (typeof crypto === 'undefined' || typeof crypto.subtle === 'undefined' || typeof crypto.subtle.digest !== 'function') {
throw newRxError('UT8', {
args: {
typeof_crypto: typeof crypto,
typeof_crypto_subtle: typeof crypto?.subtle,
typeof_crypto_subtle_digest: typeof crypto?.subtle?.digest
}
});
}
hashFn = crypto.subtle.digest.bind(crypto.subtle);
return hashFn;
}
export async function nativeSha256(input) {
var data = new TextEncoder().encode(input);
var hashBuffer = await getHashFn()('SHA-256', data);
/**
* @link https://jameshfisher.com/2017/10/30/web-cryptography-api-hello-world/
*/
var hash = Array.prototype.map.call(new Uint8Array(hashBuffer), x => ('00' + x.toString(16)).slice(-2)).join('');
return hash;
}
export var defaultHashSha256 = nativeSha256;
export function hashStringToNumber(str) {
var nr = 0;
var len = str.length;
for (var i = 0; i < len; i++) {
nr = nr + str.charCodeAt(i);
nr |= 0; // Convert to 32bit integer, improves performance
}
return nr;
}
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