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

org.bouncycastle.asn1.x509

## Class Certificate

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

- All Implemented Interfaces:
    ASN1Encodable, Encodable

      public class Certificate
      extends ASN1Object

  an X509Certificate structure.

        Certificate ::= SEQUENCE {
            tbsCertificate          TBSCertificate,
            signatureAlgorithm      AlgorithmIdentifier,
            signature               BIT STRING
        }

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `Certificate(TBSCertificate tbsCertificate, AlgorithmIdentifier signatureAlgorithm, ASN1BitString signature)`

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `Time` | `getEndDate()`
    `Extensions` | `getExtensions()`
    `static Certificate` | `getInstance(ASN1TaggedObject obj, boolean explicit)`
    `static Certificate` | `getInstance(java.lang.Object obj)`
    `X500Name` | `getIssuer()`
    `ASN1BitString` | `getIssuerUniqueID()`
    `ASN1Integer` | `getSerialNumber()`
    `ASN1BitString` | `getSignature()`
    `AlgorithmIdentifier` | `getSignatureAlgorithm()`
    `Time` | `getStartDate()`
    `X500Name` | `getSubject()`
    `SubjectPublicKeyInfo` | `getSubjectPublicKeyInfo()`
    `ASN1BitString` | `getSubjectUniqueID()`
    `TBSCertificate` | `getTBSCertificate()`
    `Validity` | `getValidity()`
    `ASN1Integer` | `getVersion()`
    `int` | `getVersionNumber()`
    `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

    - #### Certificate

          public Certificate(TBSCertificate tbsCertificate,
                             AlgorithmIdentifier signatureAlgorithm,
                             ASN1BitString signature)

  - ### Method Detail

    - #### getInstance

          public static Certificate getInstance(ASN1TaggedObject obj,
                                                boolean explicit)

    - #### getInstance

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

    - #### getTBSCertificate

          public TBSCertificate getTBSCertificate()

    - #### getVersion

          public ASN1Integer getVersion()

    - #### getVersionNumber

          public int getVersionNumber()

    - #### getSerialNumber

          public ASN1Integer getSerialNumber()

    - #### getIssuer

          public X500Name getIssuer()

    - #### getValidity

          public Validity getValidity()

    - #### getStartDate

          public Time getStartDate()

    - #### getEndDate

          public Time getEndDate()

    - #### getSubject

          public X500Name getSubject()

    - #### getSubjectPublicKeyInfo

          public SubjectPublicKeyInfo getSubjectPublicKeyInfo()

    - #### getIssuerUniqueID

          public ASN1BitString getIssuerUniqueID()

    - #### getSubjectUniqueID

          public ASN1BitString getSubjectUniqueID()

    - #### getExtensions

          public Extensions getExtensions()

    - #### getSignatureAlgorithm

          public AlgorithmIdentifier getSignatureAlgorithm()

    - #### getSignature

          public ASN1BitString getSignature()

    - #### 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.