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## org.bouncycastle.asn1.x509
Class CertificatePair

    java.lang.Object
      org.bouncycastle.asn1.ASN1Encodable
          org.bouncycastle.asn1.x509.CertificatePair

All Implemented Interfaces:
  DEREncodable

    public class CertificatePair

extends ASN1Encodable

This class helps to support crossCerfificatePairs in a LDAP directory according RFC 2587

         crossCertificatePairATTRIBUTE::={
           WITH SYNTAX   CertificatePair
           EQUALITY MATCHING RULE certificatePairExactMatch
           ID joint-iso-ccitt(2) ds(5) attributeType(4) crossCertificatePair(40)}

> The forward elements of the crossCertificatePair attribute of a CA's directory entry shall be used to store all, except self-issued certificates issued to this CA. Optionally, the reverse elements of the crossCertificatePair attribute, of a CA's directory entry may contain a subset of certificates issued by this CA to other CAs. When both the forward and the reverse elements are present in a single attribute value, issuer name in one certificate shall match the subject name in the other and vice versa, and the subject public key in one certificate shall be capable of verifying the digital signature on the other certificate and vice versa. When a reverse element is present, the forward element value and the reverse element value need not be stored in the same attribute value; in other words, they can be stored in either a single attribute value or two attribute values.

           CertificatePair ::= SEQUENCE {
             forward        [0]    Certificate OPTIONAL,
             reverse        [1]    Certificate OPTIONAL,
             -- at least one of the pair shall be present -- }

Field Summary

Fields inherited from class org.bouncycastle.asn1.ASN1Encodable
`BER, DER`

Constructor Summary
`CertificatePair(X509CertificateStructure forward, X509CertificateStructure reverse)` Constructor from a given details.

Method Summary
`X509CertificateStructure` | `getForward()`
`static CertificatePair` | `getInstance(java.lang.Object obj)`
`X509CertificateStructure` | `getReverse()`
`DERObject` | `toASN1Object()` Produce an object suitable for an ASN1OutputStream.

Methods inherited from class org.bouncycastle.asn1.ASN1Encodable
`equals, getDEREncoded, getDERObject, getEncoded, getEncoded, hashCode`

Methods inherited from class java.lang.Object
`clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### CertificatePair

    public CertificatePair(X509CertificateStructure forward,
                           X509CertificateStructure reverse)

  Constructor from a given details.

  Parameters:
    `forward` - Certificates issued to this CA.
    `reverse` - Certificates issued by this CA to other CAs.

Method Detail

### getInstance

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

### toASN1Object

    public DERObject toASN1Object()

  Produce an object suitable for an ASN1OutputStream.

  Returns:

             CertificatePair ::= SEQUENCE {
               forward        [0]    Certificate OPTIONAL,
               reverse        [1]    Certificate OPTIONAL,
               -- at least one of the pair shall be present -- }

  Specified by:
    `toASN1Object` in class `ASN1Encodable`
  Returns:
    a DERObject

### getForward

    public X509CertificateStructure getForward()

  Returns:
    Returns the forward.

### getReverse

    public X509CertificateStructure getReverse()

  Returns:
    Returns the reverse.

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