mirror of
https://github.com/jedisct1/libsodium.git
synced 2026-08-26 11:47:13 +09:00
Frank Denis
b0403efc80
Emscripten registers /dev/urandom and /dev/random by default, but falls back to Math.random()*256 when crypto.getRandomValues() is not available, which is not acceptable. So we need to re-register them no matter what.
36 lines
1.1 KiB
JavaScript
36 lines
1.1 KiB
JavaScript
try {
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this['Module'] = Module;
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Module.test;
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} catch(e) {
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this['Module'] = Module = {};
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}
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Module['preRun'] = Module['preRun'] || [];
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Module['preRun'].push(function(){
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var randombyte = null;
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try {
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function randombyte_standard() {
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var buf = new Int8Array(1);
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window.crypto.getRandomValues(buf);
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return buf[0];
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}
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randombyte_standard();
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randombyte = randombyte_standard;
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} catch (e) {
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try {
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var crypto = require('crypto');
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function randombyte_node() {
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return crypto.randomBytes(1)[0];
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}
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randombyte_node();
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randombyte = randombyte_node;
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} catch(e) {
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throw 'No secure random number generator found';
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}
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}
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FS.init();
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var devFolder = FS.findObject('/dev') ||
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Module['FS_createFolder']('/', 'dev', true, true);
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Module['FS_createDevice'](devFolder, 'random', randombyte);
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Module['FS_createDevice'](devFolder, 'urandom', randombyte);
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});
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