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# NWTCPConnectionAuthenticationDelegate

A delegate protocol to customize the TLS authentication done by a connection.

```
protocol NWTCPConnectionAuthenticationDelegate : NSObjectProtocol
```

## Overview

A delegate is not required for an [`NWTCPConnection`](/documentation/NetworkExtension/NWTCPConnection) object.

## Topics

### Delegate methods

[`shouldEvaluateTrust(for:)`](/documentation/NetworkExtension/NWTCPConnectionAuthenticationDelegate/shouldEvaluateTrust(for:))

Indicate that the delegate should override the default trust evaluation for the connection.

[`evaluateTrust(for:peerCertificateChain:completionHandler:)`](/documentation/NetworkExtension/NWTCPConnectionAuthenticationDelegate/evaluateTrust(for:peerCertificateChain:completionHandler:))

Override the default trust evaluation for the connection.

[`shouldProvideIdentity(for:)`](/documentation/NetworkExtension/NWTCPConnectionAuthenticationDelegate/shouldProvideIdentity(for:))

Indicate that the delegate can provide an identity for the connection authentication.

[`provideIdentity(for:completionHandler:)`](/documentation/NetworkExtension/NWTCPConnectionAuthenticationDelegate/provideIdentity(for:completionHandler:))

Provide the identity and an optional certificate chain to be used for authentication.


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