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| CodeSonar® 9.2p0 | 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 (Java).
| クラス名 | Use of Same Seed (Java) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 日本語クラス名 | Use of Same Seed (Java) | |||||||||
| クラス分類 | セキュリティ (security) | |||||||||
| ニーモニック | JAVA.INSEC.SS | |||||||||
| カテゴリー |
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| 対応言語 | Available for Java and Kotlin. |
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| 有効/無効設定 | このワーニングクラスのチェックはデフォルトで有効になっています。チェックを無効にするにはプロジェクト設定ファイル
（configuration file）に以下の WARNING_FILTER ルールを追加してください。
WARNING_FILTER += discard class="Use of Same Seed (Java)" |
English (en)
public class SameSeed {
public void randomPrint() {
final byte[] SEED = new byte[] {0x01, 0x02, 0x03, 0x04, 0x05};
SecureRandom secureRandom1 = new SecureRandom();
secureRandom1.setSeed(SEED);
SecureRandom secureRandom2 = new SecureRandom();
secureRandom2.setSeed(SEED); // 'Use of Same Seed (Java)' warning issued here
System.out.println("" + secureRandom1.nextInt());
System.out.println("" + secureRandom2.nextInt());
}
}
Use a less predictable seed, or don't specify a seed at all.
設定ファイルの以下のパラメータがこのワーニングクラスのチェックに影響します。
To report problems with this documentation, please visit https://support.codesecure.com/.