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fix possible underflow in BlowfishKeyProvider.LenBigNum()

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This commit is contained in:
atlimit8
2022-05-18 23:08:30 -05:00
committed by Matthias Mailänder
parent 8ce9e01c1c
commit c56d2c1bbe
1 changed files with 8 additions and 2 deletions
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10
OpenRA.Mods.Cnc/FileFormats/BlowfishKeyProvider.cs
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@@ -90,8 +90,14 @@ namespace OpenRA.Mods.Cnc.FileFormats
static uint LenBigNum(uint[] n, uint len) static uint LenBigNum(uint[] n, uint len)
{ {
var i = len - 1; if (len == 0)
while (n[i] == 0) i--; return 0;
var i = len;
while (n[--i] == 0)
if (i == 0)
return 0; // all zero
return i + 1; return i + 1;
} }