50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
---
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title: "W05. Configure TLS for wss:// Connections"
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order: 56
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status: "draft"
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---
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Client-side TLS configuration for `wss://` (WebSocket over TLS) connections uses almost the same API as `SSLClient`. `ws::WebSocketClient` handles both `ws://` and `wss://` through the same class, so there's no separate class to switch to the way `SSLClient` requires.
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```cpp
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httplib::ws::WebSocketClient ws1("ws://localhost:8080/ws"); // plaintext
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httplib::ws::WebSocketClient ws2("wss://localhost:8443/ws"); // TLS
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```
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## Verifying the server certificate
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Use `set_ca_cert_path()` to point at your own CA certificate. The signature matches `SSLClient`: the first argument is the CA certificate file, the second is an optional CA directory.
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```cpp
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httplib::ws::WebSocketClient ws("wss://internal.example.com/ws");
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ws.set_ca_cert_path("/etc/ssl/certs/internal-ca.pem");
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if (ws.connect()) {
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ws.send("hello");
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}
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```
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To disable certificate verification entirely, use `enable_server_certificate_verification(false)`. For details on that behavior, see [T02. Control SSL Certificate Verification](../t02-cert-verification).
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## Presenting a client certificate (mTLS)
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`ws::WebSocketClient` has a constructor overload that takes a `PemMemory` struct, letting `wss://` connections present a client certificate.
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```cpp
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httplib::ws::WebSocketClient::PemMemory pem{};
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pem.cert_pem = client_cert.data();
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pem.cert_pem_len = client_cert.size();
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pem.key_pem = client_key.data();
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pem.key_pem_len = client_key.size();
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httplib::ws::WebSocketClient ws("wss://api.example.com/ws", pem);
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if (ws.connect()) {
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ws.send("hello");
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}
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```
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Passing `PemMemory` to a `ws://` (non-TLS) URL is silently ignored. There's no constructor that reads the cert files directly, so unlike `SSLClient` you always load the PEM into memory yourself before passing it in.
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For the full mTLS picture, including server-side setup and use cases, see [T04. Configure mTLS](../t04-mtls).
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