.build();
OkHttpClient client = new OkHttpClient.Builder()
    .sslSocketFactory(clientCertificates.sslSocketFactory(), clientCertificates.trustManager())
    .build();
```

PEM files
---------

You can encode a `HeldCertificate` in PEM format:

```java
HeldCertificate heldCertificate = ...
System.out.println(heldCertificate.certificatePem())
```

```
-----BEGIN CERTIFICATE-----

export MINIO_AUDIT_WEBHOOK_AUTH_TOKEN_target1="token"
export MINIO_AUDIT_WEBHOOK_ENDPOINT_target1=http://localhost:8080/minio/logs
export MINIO_AUDIT_WEBHOOK_CLIENT_CERT="/tmp/cert.pem"
export MINIO_AUDIT_WEBHOOK_CLIENT_KEY=="/tmp/key.pem"
minio server /mnt/data
```

Setting this environment variable automatically enables audit logging to the HTTP target. The audit logging is in JSON format as described below.

NOTE:

* 3.3 [Use OpenSSL (with IP address) to Generate a Certificate](#using-open-ssl-with-ip)
* 3.4 [Use GnuTLS (for Windows) to Generate a Certificate](#using-gnu-tls)

**Note:**

* MinIO only supports keys and certificates in PEM format on Linux and Windows.
* MinIO doesn't currently support PFX certificates.

### 3.1 Use `certgen` to Generate a Certificate