java.lang.Object

javax.security.auth.x500.X500Principal

All Implemented Interfaces:: Serializable, Principal

public final class X500Principal extends Object implements Principal, Serializable

This class represents an X.500 Principal. X500Principals are represented by distinguished names such as "CN=Duke, OU=JavaSoft, O=Sun Microsystems, C=US".

This class can be instantiated by using a string representation of the distinguished name, or by using the ASN.1 DER encoded byte representation of the distinguished name. The current specification for the string representation of a distinguished name is defined in RFC 2253: Lightweight Directory Access Protocol (v3): UTF-8 String Representation of Distinguished Names. This class, however, accepts string formats from both RFC 2253 and RFC 1779: A String Representation of Distinguished Names, and also recognizes attribute type keywords whose OIDs (Object Identifiers) are defined in RFC 5280: Internet X.509 Public Key Infrastructure Certificate and CRL Profile.

The string representation for this X500Principal can be obtained by calling the getName methods.

Note that the getSubjectX500Principal and getIssuerX500Principal methods of X509Certificate return X500Principals representing the issuer and subject fields of the certificate.

Since:

1.4

External Specifications

See Also:

Field Summary

Fields

Modifier and Type

Field

Description

static final String

CANONICAL

Canonical String format of Distinguished Names.

static final String

RFC1779

RFC 1779 String format of Distinguished Names.

static final String

RFC2253

RFC 2253 String format of Distinguished Names.
Constructor Summary

Constructors

Constructor

Description

X500Principal(byte[] name)

Creates an X500Principal from a distinguished name in ASN.1 DER encoded form.

X500Principal(InputStream is)

Creates an X500Principal from an InputStream containing the distinguished name in ASN.1 DER encoded form.

X500Principal(String name)

Creates an X500Principal from a string representation of an X.500 distinguished name (ex: "CN=Duke, OU=JavaSoft, O=Sun Microsystems, C=US").

X500Principal(String name, Map<String,String> keywordMap)

Creates an X500Principal from a string representation of an X.500 distinguished name (ex: "CN=Duke, OU=JavaSoft, O=Sun Microsystems, C=US").
Method Summary

Modifier and Type

Method

Description

boolean

equals(Object o)

Compares the specified Object with this X500Principal for equality.

byte[]

getEncoded()

Returns the distinguished name in ASN.1 DER encoded form.

String

getName()

Returns a string representation of the X.500 distinguished name using the format defined in RFC 2253.

String

getName(String format)

Returns a string representation of the X.500 distinguished name using the specified format.

String

getName(String format, Map<String,String> oidMap)

Returns a string representation of the X.500 distinguished name using the specified format.

int

hashCode()

Returns a hash code for this X500Principal.

String

toString()

Return a user-friendly string representation of this X500Principal.

Methods declared in class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods declared in interface java.security.Principal
implies

Field Details
- RFC1779
  public static final String RFC1779
  
  RFC 1779 String format of Distinguished Names.
  
  See Also:
  
  Constant Field Values
- RFC2253
  public static final String RFC2253
  
  RFC 2253 String format of Distinguished Names.
  
  See Also:
  
  Constant Field Values
- CANONICAL
  public static final String CANONICAL
  
  Canonical String format of Distinguished Names.
  
  See Also:
  
  Constant Field Values
Constructor Details
- X500Principal
  public X500Principal(String name)
  
  Creates an X500Principal from a string representation of an X.500 distinguished name (ex: "CN=Duke, OU=JavaSoft, O=Sun Microsystems, C=US"). The distinguished name must be specified using the grammar defined in RFC 1779 or RFC 2253 (either format is acceptable).
  This constructor recognizes the attribute type keywords defined in RFC 1779 and RFC 2253 (and listed in getName(String format)), as well as the T, DNQ or DNQUALIFIER, SURNAME, GIVENNAME, INITIALS, GENERATION, EMAILADDRESS, and SERIALNUMBER keywords whose Object Identifiers (OIDs) are defined in RFC 5280. Any other attribute type must be specified as an OID.
  This implementation enforces a more restrictive OID syntax than defined in RFC 1779 and 2253. It uses the more correct syntax defined in RFC 4512, which specifies that OIDs contain at least 2 digits:
  numericoid = number 1*( DOT number )
  
  Parameters:
  
  name - an X.500 distinguished name in RFC 1779 or RFC 2253 format
  
  Throws:
  
  NullPointerException - if the name is null
  
  IllegalArgumentException - if the name is improperly specified
  
  External Specifications
  
  RFC 4512: Lightweight Directory Access Protocol (LDAP): Directory Information Models
- X500Principal
  public X500Principal(String name, Map<String,String> keywordMap)
  
  Creates an X500Principal from a string representation of an X.500 distinguished name (ex: "CN=Duke, OU=JavaSoft, O=Sun Microsystems, C=US"). The distinguished name must be specified using the grammar defined in RFC 1779 or RFC 2253 (either format is acceptable).
  This constructor recognizes the attribute type keywords specified in X500Principal(String) and also recognizes additional keywords that have entries in the keywordMap parameter. Keyword entries in the keywordMap take precedence over the default keywords recognized by X500Principal(String). Keywords MUST be specified in all upper-case, otherwise they will be ignored. Improperly specified keywords are ignored; however if a keyword in the name maps to an improperly specified Object Identifier (OID), an IllegalArgumentException is thrown. It is permissible to have 2 different keywords that map to the same OID.
  This implementation enforces a more restrictive OID syntax than defined in RFC 1779 and 2253. It uses the more correct syntax defined in RFC 4512, which specifies that OIDs contain at least 2 digits:
  numericoid = number 1*( DOT number )
  
  Parameters:
  
  name - an X.500 distinguished name in RFC 1779 or RFC 2253 format
  
  keywordMap - an attribute type keyword map, where each key is a keyword String that maps to a corresponding object identifier in String form (a sequence of nonnegative integers separated by periods). The map may be empty but never null.
  
  Throws:
  
  NullPointerException - if name or keywordMap is null
  
  IllegalArgumentException - if the name is improperly specified or a keyword in the name maps to an OID that is not in the correct form
  
  Since:
  
  1.6
  
  External Specifications
  
  RFC 4512: Lightweight Directory Access Protocol (LDAP): Directory Information Models
- X500Principal
  public X500Principal(byte[] name)
  
  Creates an X500Principal from a distinguished name in ASN.1 DER encoded form. The ASN.1 notation for this structure is as follows.
  Name ::= CHOICE { RDNSequence } RDNSequence ::= SEQUENCE OF RelativeDistinguishedName RelativeDistinguishedName ::= SET SIZE (1 .. MAX) OF AttributeTypeAndValue AttributeTypeAndValue ::= SEQUENCE { type AttributeType, value AttributeValue } AttributeType ::= OBJECT IDENTIFIER AttributeValue ::= ANY DEFINED BY AttributeType .... DirectoryString ::= CHOICE { teletexString TeletexString (SIZE (1..MAX)), printableString PrintableString (SIZE (1..MAX)), universalString UniversalString (SIZE (1..MAX)), utf8String UTF8String (SIZE (1.. MAX)), bmpString BMPString (SIZE (1..MAX)) }
  
  Parameters:
  
  name - a byte array containing the distinguished name in ASN.1 DER encoded form
  
  Throws:
  
  IllegalArgumentException - if an encoding error occurs (incorrect form for DN)
- X500Principal
  
  public X500Principal(InputStream is)
  
  Creates an X500Principal from an InputStream containing the distinguished name in ASN.1 DER encoded form. The ASN.1 notation for this structure is supplied in the documentation for X500Principal(byte[] name).
  The read position of the input stream is positioned to the next available byte after the encoded distinguished name.
  
  Parameters:
  
  is - an InputStream containing the distinguished name in ASN.1 DER encoded form
  
  Throws:
  
  NullPointerException - if the InputStream is null
  
  IllegalArgumentException - if an encoding error occurs (incorrect form for DN)
Method Details
- getName
  
  public String getName()
  
  Returns a string representation of the X.500 distinguished name using the format defined in RFC 2253.
  This method is equivalent to calling getName(X500Principal.RFC2253).
  
  Specified by:
  
  getName in interface Principal
  
  Returns:
  
  the distinguished name of this X500Principal
- getName
  public String getName(String format)
  
  Returns a string representation of the X.500 distinguished name using the specified format. Valid values for the format are "RFC1779", "RFC2253", and "CANONICAL" (case-insensitive).
  If "RFC1779" is specified as the format, this method emits the attribute type keywords defined in RFC 1779 (CN, L, ST, O, OU, C, STREET). Any other attribute type is emitted as an OID.
  If "RFC2253" is specified as the format, this method emits the attribute type keywords defined in RFC 2253 (CN, L, ST, O, OU, C, STREET, DC, UID). Any other attribute type is emitted as an OID. Under a strict reading, RFC 2253 only specifies a UTF-8 string representation. The String returned by this method is the Unicode string achieved by decoding this UTF-8 representation.
  If "CANONICAL" is specified as the format, this method returns an RFC 2253 conformant string representation with the following additional canonicalizations:
  
  Leading zeros are removed from attribute types that are encoded as dotted decimal OIDs
  DirectoryString attribute values of type PrintableString and UTF8String are not output in hexadecimal format
  DirectoryString attribute values of types other than PrintableString and UTF8String are output in hexadecimal format
  Leading and trailing white space characters are removed from non-hexadecimal attribute values (unless the value consists entirely of white space characters)
  Internal substrings of one or more white space characters are converted to a single space in non-hexadecimal attribute values
  Relative Distinguished Names containing more than one Attribute Value Assertion (AVA) are output in the following order: an alphabetical ordering of AVAs containing standard keywords, followed by a numeric ordering of AVAs containing OID keywords.
  The only characters in attribute values that are escaped are those which section 2.4 of RFC 2253 states must be escaped (they are escaped using a preceding backslash character)
  The entire name is converted to upper case using String.toUpperCase(Locale.US)
  The entire name is converted to lower case using String.toLowerCase(Locale.US)
  The name is finally normalized using normalization form KD, as described in the Unicode Standard and UAX #15
  
  Additional standard formats may be introduced in the future.
  
  Parameters:
  
  format - the format to use
  
  Returns:
  
  a string representation of this X500Principal using the specified format
  
  Throws:
  
  IllegalArgumentException - if the specified format is invalid or null
- getName
  
  public String getName(String format, Map<String,String> oidMap)
  
  Returns a string representation of the X.500 distinguished name using the specified format. Valid values for the format are "RFC1779" and "RFC2253" (case-insensitive). "CANONICAL" is not permitted and an IllegalArgumentException will be thrown.
  This method returns Strings in the format as specified in getName(String) and also emits additional attribute type keywords for OIDs that have entries in the oidMap parameter. OID entries in the oidMap take precedence over the default OIDs recognized by getName(String). Improperly specified OIDs are ignored; however if an OID in the name maps to an improperly specified keyword, an IllegalArgumentException is thrown.
  Additional standard formats may be introduced in the future.
  Warning: additional attribute type keywords may not be recognized by other implementations; therefore do not use this method if you are unsure if these keywords will be recognized by other implementations.
  
  Parameters:
  
  format - the format to use
  
  oidMap - an OID map, where each key is an object identifier in String form (a sequence of nonnegative integers separated by periods) that maps to a corresponding attribute type keyword String. The map may be empty but never null.
  
  Returns:
  
  a string representation of this X500Principal using the specified format
  
  Throws:
  
  IllegalArgumentException - if the specified format is invalid, null, or an OID in the name maps to an improperly specified keyword
  
  NullPointerException - if oidMap is null
  
  Since:
  
  1.6
- getEncoded
  
  public byte[] getEncoded()
  
  Returns the distinguished name in ASN.1 DER encoded form. The ASN.1 notation for this structure is supplied in the documentation for X500Principal(byte[] name).
  Note that the byte array returned is cloned to protect against subsequent modifications.
  
  Returns:
  
  a byte array containing the distinguished name in ASN.1 DER encoded form
- toString
  
  public String toString()
  
  Return a user-friendly string representation of this X500Principal.
  
  Specified by:
  
  toString in interface Principal
  
  Overrides:
  
  toString in class Object
  
  Returns:
  
  a string representation of this X500Principal
- equals
  public boolean equals(Object o)
  
  Compares the specified Object with this X500Principal for equality.
  Specifically, this method returns true if the Object o is an X500Principal and if the respective canonical string representations (obtained via the getName(X500Principal.CANONICAL) method) of this object and o are equal.
  This implementation is compliant with the requirements of RFC 5280.
  
  Specified by:
  
  equals in interface Principal
  
  Overrides:
  
  equals in class Object
  
  Parameters:
  
  o - Object to be compared for equality with this X500Principal
  
  Returns:
  
  true if the specified Object is equal to this X500Principal, false otherwise
  
  See Also:
  
  Object.hashCode()
  
  HashMap
- hashCode
  public int hashCode()
  
  Returns a hash code for this X500Principal.
  The hash code is calculated via: getName(X500Principal.CANONICAL).hashCode()
  
  Specified by:
  
  hashCode in interface Principal
  
  Overrides:
  
  hashCode in class Object
  
  Returns:
  
  a hash code for this X500Principal
  
  See Also:
  
  Object.equals(java.lang.Object)
  
  System.identityHashCode(java.lang.Object)

Class X500Principal

Field Summary

Constructor Summary

Method Summary

Methods declared in class java.lang.Object

Methods declared in interface java.security.Principal

Field Details

RFC1779

RFC2253

CANONICAL

Constructor Details

X500Principal

X500Principal

X500Principal

X500Principal

Method Details

getName

getName

getName

getEncoded

toString

equals

hashCode