Support Client TLS

[HTHou]

1. Genarate keystore

keytool -genkeypair -alias mykey -keyalg RSA -validity 3650 -keystore .keystore -ext san=dns:localhost,ip:127.0.0.1

Notice: must add -ext san=ip or dns:<DN address> in your command.

2. Export certificate.cer file

keytool -export -alias mykey -keystore .keystore -rfc -file certificate.cer

3. Manually import the certificate.cer into the system's trust store.
4. Enable client SSL in IoTDB side.
5. Configurate TLS in Client side.

var sessionPool = new SessionPool.Builder()
                .SetNodeUrls(sessionPoolTest.nodeUrls)
                .SetUsername(sessionPoolTest.username)
                .SetPassword(sessionPoolTest.password)
                .SetUseSsl(true)
                .SetCertificatePath("/path/to/certificate.cer")
                .Build();

var tableSessionPool = new TableSessionPool.Builder()
                .SetNodeUrls(sessionPoolTest.nodeUrls)
                .SetUsername(sessionPoolTest.username)
                .SetPassword(sessionPoolTest.password)
                .SetUseSsl(true)
                .SetCertificatePath("/path/to/certificate.cer")
                .Build();

[CritasWang]

LGTM

[Copilot]

Pull request overview

This pull request adds TLS/SSL support to the Apache IoTDB C# client, allowing secure connections between clients and IoTDB servers using X.509 certificates.

Changes:

• Added SSL configuration options (SetUseSsl and SetCertificatePath) to both SessionPool and TableSessionPool builders
• Updated SessionPool constructors and connection logic to support SSL/TLS transport using TTlsSocketTransport
• Cleaned up unused imports (System.Net.Sockets, System.Numerics, Microsoft.Extensions.Configuration)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 6 comments.

File	Description
src/Apache.IoTDB/SessionPool.Builder.cs	Added SSL configuration fields and builder methods; updated constructor calls to pass SSL parameters
src/Apache.IoTDB/TableSessionPool.Builder.cs	Added SSL configuration fields and builder methods; updated SessionPool instantiation with SSL parameters
src/Apache.IoTDB/SessionPool.cs	Added SSL fields, updated constructors, and modified CreateAndOpen to conditionally use TLS transport based on SSL configuration

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.