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Use webcrypto for random number generation if available

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Patch submitted 5/10/2013 by Gavin Andresen -- Thanks Gavin!
This commit is contained in:
Canton Becker 2013-05-10 22:38:57 -06:00
parent 0cd980cb37
commit b4c2cf68e7
1 changed files with 9 additions and 2 deletions
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9
generate-wallet.html
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@ -1622,7 +1622,14 @@
sr.pool = new Array();
sr.pptr = 0;
var t;
if (navigator.appName == "Netscape" && navigator.appVersion < "5" && window.crypto) {
// Use webcrypto if available;
// see http://www.w3.org/2012/webcrypto/WebCryptoAPI/#Crypto-method-getRandomValues
if (window.crypto && window.crypto.getRandomValues) {
sr.pool = new Uint8Array(sr.poolSize);
window.crypto.getRandomValues(sr.pool);
sr.pptr = sr.poolSize;
}
else if (navigator.appName == "Netscape" && navigator.appVersion < "5" && window.crypto) {
// Extract entropy (256 bits) from NS4 RNG if available
var z = window.crypto.random(32);
for (t = 0; t < z.length; ++t)