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Fixes random chars function to truly generate unpredictable character sequences

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This commit is contained in:
Lord Hepipud 2025-06-02 16:30:00 +02:00
parent 440a04659c
commit ba6b35da94
1 changed files with 20 additions and 5 deletions
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25
lib/core/windows/Get-IcingaRandomChars.psm1
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@ -11,13 +11,28 @@ function Get-IcingaRandomChars()
return $RandomChars;
}
while ($Count -gt 0) {
[int]$SymbolLength = $Symbols.Length;
$CryptoProvider = New-Object System.Security.Cryptography.RNGCryptoServiceProvider;
$ByteValue = New-Object Byte[] 4;
$maxValid = [uint32]::MaxValue - ([uint32]::MaxValue % $SymbolLength);
[int]$SymbolLength = $Symbols.Length;
$RandomValue = Get-Random -Minimum 0 -Maximum ($SymbolLength - 1);
$RandomChars += $Symbols[$RandomValue];
$Count -= 1;
for ($index = 0; $index -lt $Count; $index++) {
do {
# Generate random bytes
$CryptoProvider.GetBytes($ByteValue);
$RandomNumber = [BitConverter]::ToUInt32($ByteValue, 0);
# Ensure the random number is within the valid range to avoid maximum security
} while ($RandomNumber -ge $maxValid);
# Calculate the index for the symbol array
$randomIndex = $RandomNumber % $SymbolLength;
$RandomChars += $Symbols[$randomIndex];
}
# Clean up
$CryptoProvider.Dispose();
$CryptoProvider = $null;
$ByteValue = $null;
return $RandomChars;
}