/// tip

All this might not seem as useful with these simple examples.

But you will see how useful it is in the chapters about **security**.

And you will also see the amounts of code it will save you.

 * limitations under the License.
 */
package okhttp.android.test.letsencrypt

import android.os.Build
import assertk.assertThat
import assertk.assertions.isEqualTo
import java.security.cert.X509Certificate
import okhttp3.OkHttpClient
import okhttp3.Protocol
import okhttp3.Request
import okhttp3.tls.HandshakeCertificates
import okhttp3.tls.decodeCertificatePem
import org.junit.jupiter.api.Tag

 */
package okhttp3

import java.io.Closeable
import java.io.File
import java.io.Flushable
import java.io.IOException
import java.security.cert.Certificate
import java.security.cert.CertificateEncodingException
import java.security.cert.CertificateException
import java.security.cert.CertificateFactory
import java.util.TreeSet
import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
import okhttp3.MediaType.Companion.toMediaTypeOrNull

In the next chapters, I'll give you more **concrete recipes** to deploy FastAPI applications.

But for now, let's check these important **conceptual ideas**. These concepts also apply to any other type of web API. 💡

## Security - HTTPS { #security-https }

In the [previous chapter about HTTPS](https.md){.internal-link target=_blank} we learned about how HTTPS provides encryption for your API.

import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.util.Strings;

/**
 * SMB1 Negotiate Protocol request message.
 *
 * This command is used to negotiate the SMB protocol dialect
 * and security parameters between client and server.
 */
public class SmbComNegotiate extends ServerMessageBlock implements SmbNegotiationRequest {

    private final boolean signingEnforced;
    private String[] dialects;

    /**

                    this.buffer[_i] = (short) _src.dec_ndr_short();
                }
            }
        }
    }

    /**
     * Security Identifier (SID) structure for DCE/RPC operations.
     * Represents a Windows security identifier used for access control.
     */
    public static class sid_t extends NdrObject {

        /**
         * Default constructor for sid_t.
         */

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.dcerpc.msrpc;

/**
 * MSRPC implementation for looking up security identifiers (SIDs).
 * This class provides functionality to resolve SIDs to their corresponding
 * account names using the LSA RPC interface.
 */
public class MsrpcLookupSids extends jcifs.dcerpc.msrpc.lsarpc.LsarLookupSids {

    /**
     * Creates a new request to open a domain handle.
     *
     * @param handle the SAM policy handle
     * @param access the desired access rights
     * @param sid the security identifier of the domain
     * @param domainHandle the domain handle to be populated
     */

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp.android.test

import java.security.Provider
import javax.net.ssl.SSLContext
import javax.net.ssl.SSLSocket
import okhttp3.DelegatingSSLSocket
import okhttp3.DelegatingSSLSocketFactory
import okhttp3.Protocol.HTTP_1_1
import okhttp3.Protocol.HTTP_2

	public final fun check (Ljava/lang/String;[Ljava/security/cert/Certificate;)V
	public fun equals (Ljava/lang/Object;)Z
	public final fun findMatchingPins (Ljava/lang/String;)Ljava/util/List;
	public final fun getPins ()Ljava/util/Set;
	public fun hashCode ()I
	public static final fun pin (Ljava/security/cert/Certificate;)Ljava/lang/String;
	public static final fun sha1Hash (Ljava/security/cert/X509Certificate;)Lokio/ByteString;