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| CodeSonar® 9.0p0 Hot Tips | CONFIDENTIAL | CodeSecure Inc |
An unsafe or deprecated transfer protocol is used inside a transfer method.
| CSHARP_ANALYSIS_STRICT_MODE=No | TLS v1, and TLS v1.1 are considered unsafe. |
|---|---|
| CSHARP_ANALYSIS_STRICT_MODE=Yes | All TLS versions are considered unsafe. |
| Class Name | Deprecated Transfer Protocol (C#) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Significance | security | |||||||||
| Mnemonic | CSHARP.INSEC.DTP | |||||||||
| Categories |
|
|||||||||
| Availability | Available for C# only. |
|||||||||
| Enabling | Checks for this warning class are
disabled by default. To enable them, add the following WARNING_FILTER
rule to the project configuration file.
WARNING_FILTER += allow class="Deprecated Transfer Protocol (C#)" |
Japanese (ja)
using System;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Security;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
namespace UnsafeTransferProtocol
{
public class TransferProtocolUsage
{
public void UnsafeTransferProtocol(TcpClient client,
string targetHost,
X509CertificateCollection clientCertificates,
bool checkCertificateRevocation,
AsyncCallback asyncCallback,
object asyncState) {
SslStream sslStream = new SslStream(client.GetStream(), false);
sslStream.BeginAuthenticateAsClient(targetHost,
clientCertificates,
System.Security.Authentication.SslProtocols.Ssl2,
checkCertificateRevocation,
asyncCallback,
asyncState); // "Deprecated Transfer Protocol (C#)" warning issued here
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3; // "Deprecated Transfer Protocol (C#)" warning issued here
}
}
}
Parameterize it in a configuration file.
Use safer protocols.
The following configuration file parameters affect checks for this warning class.