Module org.shredzone.acme4j

Package org.shredzone.acme4j.challenge

Class Challenge

java.lang.Object

org.shredzone.acme4j.AcmeResource

org.shredzone.acme4j.AcmeJsonResource

org.shredzone.acme4j.challenge.Challenge

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

TokenChallenge

public class Challenge
extends AcmeJsonResource

A generic challenge. It can be used as a base class for actual challenge implementations, but it is also used if the ACME server offers a proprietary challenge that is unknown to acme4j.

Subclasses must override acceptable(String) so it only accepts its own type. prepareResponse(JSONBuilder) can be overridden to put all required data to the challenge response.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static final String	KEY_ERROR
protected static final String	KEY_STATUS
protected static final String	KEY_TYPE
protected static final String	KEY_URL
protected static final String	KEY_VALIDATED

Constructor Summary

Constructors

Constructor	Description
Challenge(Login login, JSON data)	Creates a new generic Challenge object.

Method Summary

Modifier and Type	Method	Description
protected boolean	acceptable(String type)	Checks if the type is acceptable to this challenge.
Optional<Problem>	getError()	Returns a reason why the challenge has failed in the past, if returned by the server.
Status	getStatus()	Returns the current status of the challenge.
String	getType()	Returns the challenge type by name (e.g.
Optional<Instant>	getValidated()	Returns the validation date, if returned by the server.
protected void	prepareResponse(JSONBuilder response)	Prepares the response message for triggering the challenge.
protected void	setJSON(JSON json)	Sets the JSON representation of the resource data.
void	trigger()	Triggers this Challenge.

Methods inherited from class org.shredzone.acme4j.AcmeJsonResource

fetch, getJSON, getRetryAfter, invalidate, isValid, setRetryAfter, update

Methods inherited from class org.shredzone.acme4j.AcmeResource

getLocation, getLogin, getSession, rebind

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

KEY_TYPE

protected static final String KEY_TYPE

See Also:

• Constant Field Values

KEY_URL

protected static final String KEY_URL

See Also:

• Constant Field Values

KEY_STATUS

protected static final String KEY_STATUS

See Also:

• Constant Field Values

KEY_VALIDATED

protected static final String KEY_VALIDATED

See Also:

• Constant Field Values

KEY_ERROR

protected static final String KEY_ERROR

See Also:

• Constant Field Values

Constructor Details

Challenge

public Challenge(Login login,
 JSON data)

Creates a new generic Challenge object.

Parameters:

login - Login the resource is bound with

data - JSON challenge data

Method Details

getType

public String getType()

Returns the challenge type by name (e.g. "http-01").

getStatus

public Status getStatus()

Returns the current status of the challenge.

Possible values are: Status.PENDING, Status.PROCESSING, Status.VALID, Status.INVALID.

A challenge is only completed when it reaches either status Status.VALID or Status.INVALID.

getValidated

public Optional<Instant> getValidated()

Returns the validation date, if returned by the server.

getError

public Optional<Problem> getError()

Returns a reason why the challenge has failed in the past, if returned by the server. If there are multiple errors, they can be found in Problem.getSubProblems().

prepareResponse

protected void prepareResponse(JSONBuilder response)

Prepares the response message for triggering the challenge. Subclasses can add fields to the JSONBuilder as required by the challenge. Implementations of subclasses should make sure that prepareResponse(JSONBuilder) of the superclass is invoked.

Parameters:

response - JSONBuilder to write the response to

acceptable

protected boolean acceptable(String type)

Checks if the type is acceptable to this challenge. This generic class only checks if the type is not blank. Subclasses should instead check if the given type matches expected challenge type.

Parameters:

type - Type to check

Returns:

true if acceptable, false if not

setJSON

protected void setJSON(JSON json)

Description copied from class: AcmeJsonResource

Sets the JSON representation of the resource data.

Overrides:

setJSON in class AcmeJsonResource

Parameters:

json - New JSON data, must not be null.

trigger

public void trigger()
             throws AcmeException

Triggers this Challenge. The ACME server is requested to validate the response. Note that the validation is performed asynchronously by the ACME server.

After a challenge is triggered, it changes to Status.PENDING. As soon as validation takes place, it changes to Status.PROCESSING. After validation the status changes to Status.VALID or Status.INVALID, depending on the outcome of the validation.

If the challenge requires a resource to be set on your side (e.g. a DNS record or an HTTP file), it must be reachable from public before trigger() is invoked, and must not be taken down until the challenge has reached Status.VALID or Status.INVALID.

If this method is invoked a second time, the ACME server is requested to retry the validation. This can be useful if the client state has changed, for example after a firewall rule has been updated.

Throws:

AcmeException