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cryptographically random uuids

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Mo Bitar
2017-01-02 10:59:41 -06:00
parent 0821053880
commit 18eae51067
3 changed files with 46 additions and 20 deletions
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33
app/assets/javascripts/app/services/helpers/crypto.js
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@@ -5,16 +5,29 @@ class SNCrypto {
}
generateUUID() {
var d = new Date().getTime();
if(window.performance && typeof window.performance.now === "function"){
d += performance.now(); //use high-precision timer if available
}
var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = (d + Math.random()*16)%16 | 0;
d = Math.floor(d/16);
return (c=='x' ? r : (r&0x3|0x8)).toString(16);
});
return uuid;
var crypto = window.crypto || window.msCrypto;
if(crypto) {
var buf = new Uint32Array(4);
crypto.getRandomValues(buf);
var idx = -1;
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
idx++;
var r = (buf[idx>>3] >> ((idx%8)*4))&15;
var v = c == 'x' ? r : (r&0x3|0x8);
return v.toString(16);
});
} else {
var d = new Date().getTime();
if(window.performance && typeof window.performance.now === "function"){
d += performance.now(); //use high-precision timer if available
}
var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = (d + Math.random()*16)%16 | 0;
d = Math.floor(d/16);
return (c=='x' ? r : (r&0x3|0x8)).toString(16);
});
return uuid;
}
}
decryptText(encrypted_content, key) {