jcwallet/patches/randombytes+2.1.0.patch
2022-07-07 12:21:40 +08:00

57 lines
1.7 KiB
Diff

diff --git a/node_modules/randombytes/browser.js b/node_modules/randombytes/browser.js
index 0fb0b71..3bd48fe 100644
--- a/node_modules/randombytes/browser.js
+++ b/node_modules/randombytes/browser.js
@@ -12,13 +12,50 @@ function oldBrowser () {
throw new Error('Secure random number generation is not supported by this browser.\nUse Chrome, Firefox or Internet Explorer 11')
}
+
+
var Buffer = require('safe-buffer').Buffer
var crypto = global.crypto || global.msCrypto
if (crypto && crypto.getRandomValues) {
module.exports = randomBytes
} else {
- module.exports = oldBrowser
+ module.exports = orandomBytes
+}
+
+function getRandomValues(array) {
+ for (var i = 0, l = array.length; i < l; i++) {
+ array[i] = Math.floor(Math.random() * 256);
+ }
+ return array;
+}
+
+function orandomBytes (size, cb) {
+ // phantomjs needs to throw
+ if (size > MAX_UINT32) throw new RangeError('requested too many random bytes')
+
+ var bytes = Buffer.allocUnsafe(size)
+
+ if (size > 0) { // getRandomValues fails on IE if size == 0
+ if (size > MAX_BYTES) { // this is the max bytes crypto.getRandomValues
+ // can do at once see https://developer.mozilla.org/en-US/docs/Web/API/window.crypto.getRandomValues
+ for (var generated = 0; generated < size; generated += MAX_BYTES) {
+ // buffer.slice automatically checks if the end is past the end of
+ // the buffer so we don't have to here
+ getRandomValues(bytes.slice(generated, generated + MAX_BYTES))
+ }
+ } else {
+ getRandomValues(bytes)
+ }
+ }
+
+ if (typeof cb === 'function') {
+ return process.nextTick(function () {
+ cb(null, bytes)
+ })
+ }
+
+ return bytes
}
function randomBytes (size, cb) {