Add warning when custom entropy is low
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@ -10741,9 +10741,10 @@ bC0zLjUsMjAuNGgtNkwyNDQuOCwzMTAuNkwyNDQuOCwzMTAuNnoiLz4KPC9nPgo8L3N2Zz4K">
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<div class="row valign-wrapper">
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<div class="col s4 right-align ">
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<input class="btn orange" type="button" onclick="js:genwallet(null);"
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value="Generate wallet" action=""/>
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<p>Custom entropy (leave empty to use PRNG)</p>
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<input type="text" value="" id="user_entropy_widget" />
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value="Generate wallet" id="gen_with_custom_entropy_button" disabled="disabled" action=""/>
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<p>Custom entropy for deterministic wallet (leave empty to use the browser's PRNG)</p>
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<input type="text" value="" id="user_entropy_widget" oninput="js:checkEntropy();" />
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<div style="color: red; display: none" id="user_entropy_warning_widget">WARNING: entropy is way too low for the wallet to be secure: aim for 256 bits (about a hundred dice throws)</div>
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</div>
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<div class="col s1 offset-s1"><h4>or</h4></div>
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<div class="col s5 offset-s1">
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@ -11093,6 +11094,43 @@ function genwallet_prefix()
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}
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}
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function checkEntropy()
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{
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var good = true;
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var button = document.getElementById("gen_with_custom_entropy_button")
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var user_entropy_widget = document.getElementById("user_entropy_widget")
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var user_entropy = user_entropy_widget.value;
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var user_entropy_warning_widget = document.getElementById("user_entropy_warning_widget")
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if (user_entropy.length === 0) {
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good = false;
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button.disabled = true
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user_entropy_warning_widget.style.display = "none"
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return
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}
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button.disabled = false
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var count = new Int32Array(256);
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for (var n = 0; n < 256; ++n)
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count[n] = 0
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for (var n = 0; n < user_entropy.length; ++n)
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count[user_entropy.charCodeAt(n)]++;
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var e = 0
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for (var n = 0; n < 256; ++n) {
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if (count[n] > 0) {
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var p = count[n] / user_entropy.length
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p *= Math.log(p) / Math.log(2)
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e -= p
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}
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}
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e *= user_entropy.length
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if (e < 128)
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good = false
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if (good)
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user_entropy_warning_widget.style.display = "none"
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else
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user_entropy_warning_widget.style.display = "block"
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}
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function toggle_qr()
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{
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address_qr_widget = document.getElementById("address_qr_widget");
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@ -1,17 +1,17 @@
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-----END PGP SIGNATURE-----
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