diff options
Diffstat (limited to 'node_modules/randombytes/browser.js')
-rw-r--r-- | node_modules/randombytes/browser.js | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/node_modules/randombytes/browser.js b/node_modules/randombytes/browser.js deleted file mode 100644 index 0fb0b71..0000000 --- a/node_modules/randombytes/browser.js +++ /dev/null @@ -1,50 +0,0 @@ -'use strict' - -// limit of Crypto.getRandomValues() -// https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues -var MAX_BYTES = 65536 - -// Node supports requesting up to this number of bytes -// https://github.com/nodejs/node/blob/master/lib/internal/crypto/random.js#L48 -var MAX_UINT32 = 4294967295 - -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 -} - -function randomBytes (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 - crypto.getRandomValues(bytes.slice(generated, generated + MAX_BYTES)) - } - } else { - crypto.getRandomValues(bytes) - } - } - - if (typeof cb === 'function') { - return process.nextTick(function () { - cb(null, bytes) - }) - } - - return bytes -} |