X500Name (Bouncy Castle Library 1.85 API Specification)
Date: 2026-07-12

org.bouncycastle.asn1.x500

## Class X500Name

- java.lang.Object
- - org.bouncycastle.asn1.ASN1Object
  - - org.bouncycastle.asn1.x500.X500Name

- All Implemented Interfaces:
    ASN1Choice, ASN1Encodable, Encodable

      public class X500Name
      extends ASN1Object
      implements ASN1Choice

  The X.500 Name object.

           Name ::= CHOICE {
                             RDNSequence }

           RDNSequence ::= SEQUENCE OF RelativeDistinguishedName

           RelativeDistinguishedName ::= SET SIZE (1..MAX) OF AttributeTypeAndValue

           AttributeTypeAndValue ::= SEQUENCE {
                                         type  OBJECT IDENTIFIER,
                                         value ANY }

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `X500Name(RDN[] rDNs)`
    `X500Name(java.lang.String dirName)`
    `X500Name(X500NameStyle style, RDN[] rDNs)`
    `X500Name(X500NameStyle style, java.lang.String dirName)`
    `X500Name(X500NameStyle style, X500Name name)` Deprecated. use the getInstance() method that takes a style.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(java.lang.Object obj)` test for equality - note: case is ignored.
    `ASN1ObjectIdentifier[]` | `getAttributeTypes()` return an array of OIDs contained in the attribute type of each RDN in structure order.
    `static X500NameStyle` | `getDefaultStyle()` Return the current default style.
    `static X500Name` | `getInstance(ASN1TaggedObject taggedObject, boolean declaredExplicit)` Return a X500Name based on the passed in tagged object.
    `static X500Name` | `getInstance(java.lang.Object obj)`
    `static X500Name` | `getInstance(X500NameStyle style, java.lang.Object obj)`
    `RDN[]` | `getRDNs()` return an array of RDNs in structure order.
    `RDN[]` | `getRDNs(ASN1ObjectIdentifier attributeType)` return an array of RDNs containing the attribute type given by OID in structure order.
    `static X500Name` | `getTagged(ASN1TaggedObject taggedObject, boolean declaredExplicit)`
    `int` | `hashCode()`
    `static void` | `setDefaultStyle(X500NameStyle style)` Set the default style for X500Name construction.
    `int` | `size()`
    `ASN1Primitive` | `toASN1Primitive()` Method providing a primitive representation of this object suitable for encoding.
    `java.lang.String` | `toString()`

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

      `encodeTo, encodeTo, getEncoded, getEncoded, hasEncodedTagValue`

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

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

- - ### Constructor Detail

    - #### X500Name

          public X500Name(X500NameStyle style,
                          X500Name name)

      Deprecated. use the getInstance() method that takes a style.

    - #### X500Name

          public X500Name(RDN[] rDNs)

    - #### X500Name

          public X500Name(X500NameStyle style,
                          RDN[] rDNs)

    - #### X500Name

          public X500Name(java.lang.String dirName)

    - #### X500Name

          public X500Name(X500NameStyle style,
                          java.lang.String dirName)

  - ### Method Detail

    - #### getInstance

          public static X500Name getInstance(ASN1TaggedObject taggedObject,
                                             boolean declaredExplicit)

      Return a X500Name based on the passed in tagged object.
      Parameters:
        `obj` - tag object holding name.
        `explicit` - true if explicitly tagged false otherwise.
      Returns:
        the X500Name

    - #### getTagged

          public static X500Name getTagged(ASN1TaggedObject taggedObject,
                                           boolean declaredExplicit)

    - #### getInstance

          public static X500Name getInstance(java.lang.Object obj)

    - #### getInstance

          public static X500Name getInstance(X500NameStyle style,
                                             java.lang.Object obj)

    - #### getRDNs

          public RDN[] getRDNs()

      return an array of RDNs in structure order.
      Returns:
        an array of RDN objects.

    - #### getAttributeTypes

          public ASN1ObjectIdentifier[] getAttributeTypes()

      return an array of OIDs contained in the attribute type of each RDN in structure order.
      Returns:
        an array, possibly zero length, of ASN1ObjectIdentifiers objects.

    - #### getRDNs

          public RDN[] getRDNs(ASN1ObjectIdentifier attributeType)

      return an array of RDNs containing the attribute type given by OID in structure order.
      Parameters:
        `attributeType` - the type OID we are looking for.
      Returns:
        an array, possibly zero length, of RDN objects.

    - #### size

          public int size()

    - #### 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.

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `ASN1Object`

    - #### equals

          public boolean equals(java.lang.Object obj)

      test for equality - note: case is ignored.
      Overrides:
        `equals` in class `ASN1Object`

    - #### toString

          public java.lang.String toString()

      Overrides:
        `toString` in class `java.lang.Object`

    - #### setDefaultStyle

          public static void setDefaultStyle(X500NameStyle style)

      Set the default style for X500Name construction.
      Parameters:
        `style` - an X500NameStyle

    - #### getDefaultStyle

          public static X500NameStyle getDefaultStyle()

      Return the current default style.
      Returns:
        default style for X500Name construction.