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A weak, possibly reversible Initialization Vector is passed as a parameter.
Some cryptography algorithms are nowadays considered as outdated and unsafe or actually broken, since they are too easy to decode. This checker identifies uses of unsafe algorithms for cryptography.
The OWASP documentation provides more information on Using the Java Cryptographic Extensions.
| クラス名 | Weak Initialization Vector Value (Java) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 日本語クラス名 | Weak Initialization Vector Value (Java) | ||||||||||||
| クラス分類 | セキュリティ (security) | ||||||||||||
| ニーモニック | JAVA.CRYPTO.WIV | ||||||||||||
| カテゴリー |
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| 対応言語 | Java で利用可能です。 |
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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="Weak Initialization Vector Value (Java)" |
English (en)
import javax.crypto.spec.IvParameterSpec;
public class InitializationVector {
public static IvParameterSpec weakInit(byte[] bytes) {
byte[] iv ={
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
return new IvParameterSpec(iv); // 'Weak Initialization Vector Value (Java)'
// warning issued here
}
}
Generate a secure random Initialization Vector.
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。