rxdb
Version:
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
49 lines (46 loc) • 1.65 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.defaultHashSha256 = exports.canUseCryptoSubtle = void 0;
exports.hashStringToNumber = hashStringToNumber;
exports.jsSha256 = jsSha256;
exports.nativeSha256 = nativeSha256;
var _ohash = require("ohash");
/**
* TODO in the future we should no longer provide a
* fallback to crypto.subtle.digest.
* Instead users without crypto.subtle.digest support, should have to provide their own
* hash function.
*/
function jsSha256(input) {
return Promise.resolve((0, _ohash.sha256)(input));
}
async function nativeSha256(input) {
var data = new TextEncoder().encode(input);
var hashBuffer = await crypto.subtle.digest('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;
}
var canUseCryptoSubtle = exports.canUseCryptoSubtle = typeof crypto !== 'undefined' && typeof crypto.subtle !== 'undefined' && typeof crypto.subtle.digest === 'function';
/**
* Default hash method used to hash
* strings and do equal comparisons.
*
* IMPORTANT: Changing the default hashing method
* requires a BREAKING change!
*/
var defaultHashSha256 = exports.defaultHashSha256 = canUseCryptoSubtle ? nativeSha256 : jsSha256;
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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