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97 lines
3.0 KiB
97 lines
3.0 KiB
2 years ago
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import randombytes from "../randombytes";
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'use strict';
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function oldBrowser() {
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throw new Error('secure random number generation not supported by this browser\nuse chrome, FireFox or Internet Explorer 11');
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}
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var kBufferMaxLength = Buffer.kMaxLength;
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var crypto = global.crypto || global.msCrypto;
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var kMaxUint32 = Math.pow(2, 32) - 1;
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function assertOffset(offset, length) {
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if (typeof offset !== 'number' || offset !== offset) { // eslint-disable-line no-self-compare
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throw new TypeError('offset must be a number');
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}
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if (offset > kMaxUint32 || offset < 0) {
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throw new TypeError('offset must be a uint32');
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}
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if (offset > kBufferMaxLength || offset > length) {
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throw new RangeError('offset out of range');
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}
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}
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function assertSize(size, offset, length) {
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if (typeof size !== 'number' || size !== size) { // eslint-disable-line no-self-compare
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throw new TypeError('size must be a number');
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}
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if (size > kMaxUint32 || size < 0) {
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throw new TypeError('size must be a uint32');
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}
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if (size + offset > length || size > kBufferMaxLength) {
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throw new RangeError('buffer too small');
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}
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}
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if ((crypto && crypto.getRandomValues) || !process.browser) {
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}
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else {
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}
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function randomFill(buf, offset, size, cb) {
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if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) {
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throw new TypeError('"buf" argument must be a Buffer or Uint8Array');
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}
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if (typeof offset === 'function') {
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cb = offset;
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offset = 0;
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size = buf.length;
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}
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else if (typeof size === 'function') {
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cb = size;
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size = buf.length - offset;
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}
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else if (typeof cb !== 'function') {
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throw new TypeError('"cb" argument must be a function');
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}
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assertOffset(offset, buf.length);
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assertSize(size, offset, buf.length);
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return actualFill(buf, offset, size, cb);
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}
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function actualFill(buf, offset, size, cb) {
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if (process.browser) {
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var ourBuf = buf.buffer;
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var uint = new Uint8Array(ourBuf, offset, size);
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crypto.getRandomValues(uint);
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if (cb) {
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process.nextTick(function () {
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cb(null, buf);
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});
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return;
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}
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return buf;
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}
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if (cb) {
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randombytes(size, function (err, bytes) {
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if (err) {
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return cb(err);
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}
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bytes.copy(buf, offset);
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cb(null, buf);
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});
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return;
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}
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var bytes = randombytes(size);
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bytes.copy(buf, offset);
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return buf;
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}
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function randomFillSync(buf, offset, size) {
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if (typeof offset === 'undefined') {
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offset = 0;
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}
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if (!Buffer.isBuffer(buf) && !(buf instanceof global.Uint8Array)) {
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throw new TypeError('"buf" argument must be a Buffer or Uint8Array');
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}
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assertOffset(offset, buf.length);
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if (size === undefined)
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size = buf.length - offset;
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assertSize(size, offset, buf.length);
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return actualFill(buf, offset, size);
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}
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export { randomFill };
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export { randomFillSync };
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