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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
The same random seed is used multiple times.
If two random generators are initialized with the same seed, they will produce the same predictable sequence of numbers.
See also Hardcoded Random Seed (C#).
| Class Name | Use of Same Seed (C#) | |||
|---|---|---|---|---|
| Significance | security | |||
| Mnemonic | CSHARP.INSEC.SS | |||
| Categories |
|
|||
| Availability | Available for C# only. |
|||
| Enabling | Checks for this warning class are enabled by
default. To disable them, add the following WARNING_FILTER rule to the
project configuration file.
WARNING_FILTER += discard class="Use of Same Seed (C#)" |
Japanese (ja)
using System;
namespace Same_Seed_in_PRNG {
class Same_Seed_in_PRNG {
public static int SEED = 999;
public override void MyRand() {
Random random1 = new Random(SEED);
Random random2 = new Random(SEED); // 'Use of Same Seed (C#)' warning issued here
Console.WriteLine("" + random1.Next());
Console.WriteLine("" + random2.Next());
}
}
}
Use a less predictable seed, or don't specify a seed at all.
The following configuration file parameters affect checks for this warning class.