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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/randomfill/browser.js | |
download | website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.gz website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.tar.bz2 website_creator-e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d.zip |
api, login, auth
Diffstat (limited to 'node_modules/randomfill/browser.js')
-rw-r--r-- | node_modules/randomfill/browser.js | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/node_modules/randomfill/browser.js b/node_modules/randomfill/browser.js new file mode 100644 index 0000000..ce34a69 --- /dev/null +++ b/node_modules/randomfill/browser.js @@ -0,0 +1,108 @@ +'use strict' + +function oldBrowser () { + throw new Error('secure random number generation not supported by this browser\nuse chrome, FireFox or Internet Explorer 11') +} +var safeBuffer = require('safe-buffer') +var randombytes = require('randombytes') +var Buffer = safeBuffer.Buffer +var kBufferMaxLength = safeBuffer.kMaxLength +var crypto = global.crypto || global.msCrypto +var kMaxUint32 = Math.pow(2, 32) - 1 +function assertOffset (offset, length) { + if (typeof offset !== 'number' || offset !== offset) { // eslint-disable-line no-self-compare + throw new TypeError('offset must be a number') + } + + if (offset > kMaxUint32 || offset < 0) { + throw new TypeError('offset must be a uint32') + } + + if (offset > kBufferMaxLength || offset > length) { + throw new RangeError('offset out of range') + } +} + +function assertSize (size, offset, length) { + if (typeof size !== 'number' || size !== size) { // eslint-disable-line no-self-compare + throw new TypeError('size must be a number') + } + + if (size > kMaxUint32 || size < 0) { + throw new TypeError('size must be a uint32') + } + + if (size + offset > length || size > kBufferMaxLength) { + throw new RangeError('buffer too small') + } +} +if ((crypto && crypto.getRandomValues) || !process.browser) { + exports.randomFill = randomFill + exports.randomFillSync = randomFillSync +} else { + exports.randomFill = oldBrowser + exports.randomFillSync = oldBrowser +} +function randomFill (buf, offset, size, cb) { + if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) { + throw new TypeError('"buf" argument must be a Buffer or Uint8Array') + } + + if (typeof offset === 'function') { + cb = offset + offset = 0 + size = buf.length + } else if (typeof size === 'function') { + cb = size + size = buf.length - offset + } else if (typeof cb !== 'function') { + throw new TypeError('"cb" argument must be a function') + } + assertOffset(offset, buf.length) + assertSize(size, offset, buf.length) + return actualFill(buf, offset, size, cb) +} + +function actualFill (buf, offset, size, cb) { + if (process.browser) { + var ourBuf = buf.buffer + var uint = new Uint8Array(ourBuf, offset, size) + crypto.getRandomValues(uint) + if (cb) { + process.nextTick(function () { + cb(null, buf) + }) + return + } + return buf + } + if (cb) { + randombytes(size, function (err, bytes) { + if (err) { + return cb(err) + } + bytes.copy(buf, offset) + cb(null, buf) + }) + return + } + var bytes = randombytes(size) + bytes.copy(buf, offset) + return buf +} +function randomFillSync (buf, offset, size) { + if (typeof offset === 'undefined') { + offset = 0 + } + if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) { + throw new TypeError('"buf" argument must be a Buffer or Uint8Array') + } + + assertOffset(offset, buf.length) + + if (size === undefined) size = buf.length - offset + + assertSize(size, offset, buf.length) + + return actualFill(buf, offset, size) +} |