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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
A function uses a cryptographic operation, but is missing a prerequisite step for that operation.
| クラス名 | Missing Required Cryptographic Step (Java) | |||
|---|---|---|---|---|
| 日本語クラス名 | Missing Required Cryptographic Step (Java) | |||
| クラス分類 | セキュリティ (security) | |||
| ニーモニック | JAVA.CRYPTO.MRCS | |||
| 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="Missing Required Cryptographic Step (Java)" |
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
public class MissingCryptoStep {
public void CryptoMethod() throws NoSuchAlgorithmException {
KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
SecretKey secretKey = keyGenerator.generateKey(); // 'Missing Required Cryptographic Step (Java)' warning issued here:
// - Missing call to init() before call to generateKey().
// - Default initialization will be used. This may result in a less secure key than desired,
// and may also cause interoperability issues if multiple different cryptographic
// providers are used.
// ...
MessageDigest messageDigest = MessageDigest.getInstance("SHA-512");
byte[] hash = messageDigest.digest(); // 'Missing Required Cryptographic Step (Java)' warning issued here:
// - Missing call to update() before call to digest().
// - 'hash' will contain no data.
// ...
}
}
Add the missing cryptographic step.
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。