diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/OutOfBand01Challenge.java b/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/OutOfBand01Challenge.java
deleted file mode 100644
index 39640517..00000000
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/OutOfBand01Challenge.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * acme4j - Java ACME client
- *
- * Copyright (C) 2016 Richard "Shred" Körber
- * http://acme4j.shredzone.org
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- */
-package org.shredzone.acme4j.challenge;
-
-import java.net.URL;
-
-import org.shredzone.acme4j.Session;
-
-/**
- * Implements the {@value TYPE} challenge.
- */
-public class OutOfBand01Challenge extends Challenge {
- private static final long serialVersionUID = -7459595198486630582L;
-
- /**
- * Challenge type name: {@value}
- */
- public static final String TYPE = "oob-01";
-
- /**
- * Creates a new generic {@link OutOfBand01Challenge} object.
- *
- * @param session
- * {@link Session} to bind to.
- */
- public OutOfBand01Challenge(Session session) {
- super(session);
- }
-
- /**
- * Returns the validation URL to be visited by the customer in order to complete the
- * challenge.
- */
- public URL getValidationUrl() {
- return getJSON().get("href").asURL();
- }
-
-}
diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/provider/AbstractAcmeProvider.java b/acme4j-client/src/main/java/org/shredzone/acme4j/provider/AbstractAcmeProvider.java
index 7184383e..38e678f2 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/provider/AbstractAcmeProvider.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/provider/AbstractAcmeProvider.java
@@ -25,7 +25,6 @@ import org.shredzone.acme4j.Session;
import org.shredzone.acme4j.challenge.Challenge;
import org.shredzone.acme4j.challenge.Dns01Challenge;
import org.shredzone.acme4j.challenge.Http01Challenge;
-import org.shredzone.acme4j.challenge.OutOfBand01Challenge;
import org.shredzone.acme4j.challenge.TlsSni02Challenge;
import org.shredzone.acme4j.connector.Connection;
import org.shredzone.acme4j.connector.DefaultConnection;
@@ -68,7 +67,6 @@ public abstract class AbstractAcmeProvider implements AcmeProvider {
map.put(Dns01Challenge.TYPE, Dns01Challenge::new);
map.put(TlsSni02Challenge.TYPE, TlsSni02Challenge::new);
map.put(Http01Challenge.TYPE, Http01Challenge::new);
- map.put(OutOfBand01Challenge.TYPE, OutOfBand01Challenge::new);
return Collections.unmodifiableMap(map);
}
diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/challenge/OutOfBandChallengeTest.java b/acme4j-client/src/test/java/org/shredzone/acme4j/challenge/OutOfBandChallengeTest.java
deleted file mode 100644
index bbb88de0..00000000
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/challenge/OutOfBandChallengeTest.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * acme4j - Java ACME client
- *
- * Copyright (C) 2016 Richard "Shred" Körber
- * http://acme4j.shredzone.org
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- */
-package org.shredzone.acme4j.challenge;
-
-import static org.hamcrest.Matchers.is;
-import static org.junit.Assert.assertThat;
-import static org.shredzone.acme4j.toolbox.TestUtils.getJSON;
-import static uk.co.datumedge.hamcrest.json.SameJSONAs.sameJSONAs;
-
-import java.io.IOException;
-import java.net.URL;
-
-import org.junit.BeforeClass;
-import org.junit.Test;
-import org.shredzone.acme4j.Session;
-import org.shredzone.acme4j.Status;
-import org.shredzone.acme4j.toolbox.JSONBuilder;
-import org.shredzone.acme4j.toolbox.TestUtils;
-
-/**
- * Unit tests for {@link OutOfBand01Challenge}.
- */
-public class OutOfBandChallengeTest {
- private static Session session;
-
- @BeforeClass
- public static void setup() throws IOException {
- session = TestUtils.session();
- }
-
- /**
- * Test that {@link OutOfBand01Challenge} is returning the validation URL.
- */
- @Test
- public void testHttpChallenge() throws IOException {
- OutOfBand01Challenge challenge = new OutOfBand01Challenge(session);
- challenge.unmarshall(getJSON("oobChallenge"));
-
- assertThat(challenge.getType(), is(OutOfBand01Challenge.TYPE));
- assertThat(challenge.getStatus(), is(Status.UNKNOWN));
- assertThat(challenge.getValidationUrl(),
- is(new URL("https://example.com/validate/evaGxfADs6pSRb2LAv9IZ")));
-
- JSONBuilder cb = new JSONBuilder();
- challenge.respond(cb);
-
- assertThat(cb.toString(), sameJSONAs("{\"type\": \"oob-01\"}"));
- }
-
-}
diff --git a/acme4j-client/src/test/java/org/shredzone/acme4j/provider/AbstractAcmeProviderTest.java b/acme4j-client/src/test/java/org/shredzone/acme4j/provider/AbstractAcmeProviderTest.java
index 06049d7d..6ed1dfcd 100644
--- a/acme4j-client/src/test/java/org/shredzone/acme4j/provider/AbstractAcmeProviderTest.java
+++ b/acme4j-client/src/test/java/org/shredzone/acme4j/provider/AbstractAcmeProviderTest.java
@@ -30,7 +30,6 @@ import org.shredzone.acme4j.Session;
import org.shredzone.acme4j.challenge.Challenge;
import org.shredzone.acme4j.challenge.Dns01Challenge;
import org.shredzone.acme4j.challenge.Http01Challenge;
-import org.shredzone.acme4j.challenge.OutOfBand01Challenge;
import org.shredzone.acme4j.challenge.TlsSni02Challenge;
import org.shredzone.acme4j.connector.Connection;
import org.shredzone.acme4j.connector.DefaultConnection;
@@ -155,12 +154,8 @@ public class AbstractAcmeProviderTest {
Challenge c6 = provider.createChallenge(session, "foobar-01");
assertThat(c6, is(nullValue()));
- Challenge c7 = provider.createChallenge(session, OutOfBand01Challenge.TYPE);
- assertThat(c7, not(nullValue()));
- assertThat(c7, instanceOf(OutOfBand01Challenge.class));
-
- Challenge c8 = provider.createChallenge(session, "");
- assertThat(c8, is(nullValue()));
+ Challenge c7 = provider.createChallenge(session, "");
+ assertThat(c7, is(nullValue()));
try {
provider.createChallenge(session, (String) null);
diff --git a/acme4j-client/src/test/resources/json/oobChallenge.json b/acme4j-client/src/test/resources/json/oobChallenge.json
deleted file mode 100644
index 31b55cc5..00000000
--- a/acme4j-client/src/test/resources/json/oobChallenge.json
+++ /dev/null
@@ -1,4 +0,0 @@
-{
- "type": "oob-01",
- "href": "https://example.com/validate/evaGxfADs6pSRb2LAv9IZ"
-}
diff --git a/src/site/markdown/challenge/index.md b/src/site/markdown/challenge/index.md
index d5bff4b7..1c749296 100644
--- a/src/site/markdown/challenge/index.md
+++ b/src/site/markdown/challenge/index.md
@@ -11,4 +11,3 @@ The ACME specifications define these standard challenges:
* [http-01](./http-01.html)
* [dns-01](./dns-01.html)
* [tls-sni-02](./tls-sni-02.html)
-* [oob-01](./oob-01.html)
diff --git a/src/site/markdown/challenge/oob-01.md b/src/site/markdown/challenge/oob-01.md
deleted file mode 100644
index f5c2e348..00000000
--- a/src/site/markdown/challenge/oob-01.md
+++ /dev/null
@@ -1,9 +0,0 @@
-# oob-01 Challenge
-
-The `oob-01` challenge is an "out of band" challenge that is used when there is no automatic way of validating ownership of a domain. The client is instead required to perform actions outside of the ACME protocol.
-
-`OutOfBand01Challenge` implements this challenge. Its `getValidationUrl()` method returns a URL that refers to a web page with further instructions about the actions to be taken by the domain owner.
-
-The challenge must be triggered _before_ the URL is presented to the domain owner.
-
-> __Note:__ Due to the nature of this challenge, it may take hours or even days until the domain owner finishes the actions and the challenge state changes to `VALID`.
diff --git a/src/site/site.xml b/src/site/site.xml
index 298b3392..bc12b38d 100644
--- a/src/site/site.xml
+++ b/src/site/site.xml
@@ -40,7 +40,6 @@
-
-