Package ai.nightfall.scan

Class WebhookSignatureValidator

java.lang.Object

ai.nightfall.scan.WebhookSignatureValidator

public class WebhookSignatureValidator
extends Object

A class that implements Nightfall webhook signature validation. This class can be used in a request middleware to validate the authenticity of a request before processing it. Validation is implemented with an SHA-256 HMAC signature.

Constructor Summary

Constructors

Constructor	Description
WebhookSignatureValidator()	Instantiates the validator with the default threshold.
WebhookSignatureValidator(TemporalAmount threshold)	Instantiates the validator with the provided threshold.

Method Summary

Modifier and Type	Method	Description
boolean	validate(String requestBody, byte[] signingSecret, String requestSignature, String requestTime)	Validates that the provided request payload is an authentic request that originated from Nightfall.

Methods inherited from class java.lang.Object

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

Constructor Details

WebhookSignatureValidator

public WebhookSignatureValidator()

Instantiates the validator with the default threshold.

WebhookSignatureValidator

public WebhookSignatureValidator(TemporalAmount threshold)

Instantiates the validator with the provided threshold.

Parameters:

threshold - the time threshold within which webhook requests should be considered valid.

Method Details

validate

public boolean validate(String requestBody,
 byte[] signingSecret,
 String requestSignature,
 String requestTime)

Validates that the provided request payload is an authentic request that originated from Nightfall. If this method returns false, request handlers shall not process the provided body any further.

Parameters:

requestBody - the entire, raw request payload, encoded in UTF-8.

signingSecret - the signing secret used as the key for HMAC.

requestSignature - the signature provided by Nightfall to compare against the locally-computed value.

requestTime - the Unix timestamp of when this request was sent, i.e. the number of seconds since the Unix epoch.

Returns:

true if the signature is valid and the request occurred within the allowed time threshold, otherwise false.

Throws:

NumberFormatException - if requestTime is not parsable as an integer