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A cryptographic algorithm that contains an risky cipher algorithm.
Some cryptography algorithms are nowadays considered as outdated and unsafe or actually broken, since they are too easy to decode.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.
| Class Name | Cryptographic Algorithm with Weak Cipher (C#) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Significance | security | |||||||||
| Mnemonic | CSHARP.CRYPTO.CARC | |||||||||
| Categories |
|
|||||||||
| Availability | Available for C# only. |
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| 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="Cryptographic Algorithm with Weak Cipher (C#)" |
Japanese (ja)
using System;
using System.Security.Cryptography;
namespace DocumentationExamples
{
public class Cryptography
{
public static void Main(string[] args)
{
DES.Create(); // Risky Cryptographic Field (C#) warning issued here
SHA256.Create();
MD5.Create(); // Weak Hash Algorithm (C#) warning issued here
string mypassword = "HELLO WORLD!";
Convert.FromBase64String(mypassword); // Unsafe Base64 Encoding (C#) warning issued here
AesCryptoServiceProvider provider = new AesCryptoServiceProvider();
provider.Mode = CipherMode.ECB; // Cryptographic Algorithm with Weak Cipher (C#) warning issued here
// - AesCryptoServiceProvider is a secure algorithm, but ECB is an unsafe cipher mode.
}
}
}
It is advisable to use a safe cipher mode such as the GCM (Galois/Counter Mode). However, the .NET frameworks do not natively provide GCM, so using it will require adopting a third party implementation using a secure and certified library.
Use a safer cryptography algorithm.
The following configuration file parameters affect checks for this warning class.