RelatedCertificate (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.asn1.x509

## Class RelatedCertificate

- java.lang.Object
- - org.bouncycastle.asn1.ASN1Object
  - - org.bouncycastle.asn1.x509.RelatedCertificate

- All Implemented Interfaces:
    ASN1Encodable, Encodable

      public class RelatedCertificate
      extends ASN1Object

  RFC 9763 sec. 3 `RelatedCertificate` certificate extension value.

       RelatedCertificate ::= SEQUENCE {
           hashAlgorithm DigestAlgorithmIdentifier,
           hashValue     OCTET STRING
       }

  The `hashValue` is the digest of the DER-encoded `Certificate` structure (TBSCertificate + signatureAlgorithm + signatureValue) of the single related end-entity certificate listed in the matching `id-aa-relatedCertRequest` attribute of the CSR that produced this certificate (RFC 9763 sec. 3.2).

  Identified by `X509ObjectIdentifiers.id_pe_relatedCert` / `Extension.relatedCertificate` (OID 1.3.6.1.5.5.7.1.36). RFC 9763 sec. 3.1 says the extension SHOULD NOT be marked critical.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `RelatedCertificate(AlgorithmIdentifier hashAlgorithm, ASN1OctetString hashValue)`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `AlgorithmIdentifier` | `getHashAlgorithm()`
    `ASN1OctetString` | `getHashValue()`
    `static RelatedCertificate` | `getInstance(java.lang.Object obj)`
    `ASN1Primitive` | `toASN1Primitive()` Method providing a primitive representation of this object suitable for encoding.

    - ### Methods inherited from class org.bouncycastle.asn1.ASN1Object

      `encodeTo, encodeTo, equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode`

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### RelatedCertificate

          public RelatedCertificate(AlgorithmIdentifier hashAlgorithm,
                                    ASN1OctetString hashValue)

  - ### Method Detail

    - #### getInstance

          public static RelatedCertificate getInstance(java.lang.Object obj)

    - #### getHashAlgorithm

          public AlgorithmIdentifier getHashAlgorithm()

    - #### getHashValue

          public ASN1OctetString getHashValue()

    - #### toASN1Primitive

          public ASN1Primitive toASN1Primitive()

      Description copied from class: `ASN1Object`
      Method providing a primitive representation of this object suitable for encoding.
      Specified by:
        `toASN1Primitive` in interface `ASN1Encodable`
      Specified by:
        `toASN1Primitive` in class `ASN1Object`
      Returns:
        a primitive representation of this object.