javax.security.auth.kerberos

Class KerberosPrincipal

java.lang.Object

javax.security.auth.kerberos.KerberosPrincipal

All Implemented Interfaces:

Serializable, Principal

public final class KerberosPrincipal
extends Object
implements Principal, Serializable

This class encapsulates a Kerberos principal.

Since:

1.4

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	KRB_NT_PRINCIPAL user principal name type.
static int	KRB_NT_SRV_HST service with host name as instance (telnet, rcommands) name type.
static int	KRB_NT_SRV_INST service and other unique instance (krbtgt) name type.
static int	KRB_NT_SRV_XHST service with host as remaining components name type.
static int	KRB_NT_UID unique ID name type.
static int	KRB_NT_UNKNOWN unknown name type.

Constructor Summary

Constructors

Constructor and Description
KerberosPrincipal(String name) Constructs a KerberosPrincipal from the provided string input.
KerberosPrincipal(String name, int nameType) Constructs a KerberosPrincipal from the provided string and name type input.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object other) Compares the specified Object with this Principal for equality.
String	getName() The returned string corresponds to the single-string representation of a Kerberos Principal name as specified in Section 2.1 of RFC 1964.
int	getNameType() Returns the name type of the KerberosPrincipal.
String	getRealm() Returns the realm component of this Kerberos principal.
int	hashCode() Returns a hashcode for this principal.
String	toString() Returns a string representation of the object.

Methods inherited from class java.lang.Object

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

Field Detail

KRB_NT_UNKNOWN

public static final int KRB_NT_UNKNOWN

unknown name type.

See Also:

Constant Field Values

KRB_NT_PRINCIPAL

public static final int KRB_NT_PRINCIPAL

user principal name type.

See Also:

Constant Field Values

KRB_NT_SRV_INST

public static final int KRB_NT_SRV_INST

service and other unique instance (krbtgt) name type.

See Also:

Constant Field Values

KRB_NT_SRV_HST

public static final int KRB_NT_SRV_HST

service with host name as instance (telnet, rcommands) name type.

See Also:

Constant Field Values

KRB_NT_SRV_XHST

public static final int KRB_NT_SRV_XHST

service with host as remaining components name type.

See Also:

Constant Field Values

KRB_NT_UID

public static final int KRB_NT_UID

unique ID name type.

See Also:

Constant Field Values

Constructor Detail

KerberosPrincipal

public KerberosPrincipal(String name)

Constructs a KerberosPrincipal from the provided string input. The name type for this principal defaults to KRB_NT_PRINCIPAL This string is assumed to contain a name in the format that is specified in Section 2.1.1. (Kerberos Principal Name Form) of RFC 1964 (for example, duke@FOO.COM, where duke represents a principal, and FOO.COM represents a realm).

If the input name does not contain a realm, the default realm is used. The default realm can be specified either in a Kerberos configuration file or via the java.security.krb5.realm system property. For more information, Kerberos Requirements

Parameters:

name - the principal name

Throws:

IllegalArgumentException - if name is improperly formatted, if name is null, or if name does not contain the realm to use and the default realm is not specified in either a Kerberos configuration file or via the java.security.krb5.realm system property.

KerberosPrincipal

public KerberosPrincipal(String name,
                 int nameType)

Constructs a KerberosPrincipal from the provided string and name type input. The string is assumed to contain a name in the format that is specified in Section 2.1 (Mandatory Name Forms) of RFC 1964. Valid name types are specified in Section 6.2 (Principal Names) of RFC 4120. The input name must be consistent with the provided name type. (for example, duke@FOO.COM, is a valid input string for the name type, KRB_NT_PRINCIPAL where duke represents a principal, and FOO.COM represents a realm).

If the input name does not contain a realm, the default realm is used. The default realm can be specified either in a Kerberos configuration file or via the java.security.krb5.realm system property. For more information, see Kerberos Requirements.

Parameters:

name - the principal name

nameType - the name type of the principal

Throws:

IllegalArgumentException - if name is improperly formatted, if name is null, if the nameType is not supported, or if name does not contain the realm to use and the default realm is not specified in either a Kerberos configuration file or via the java.security.krb5.realm system property.

Method Detail

getRealm

public String getRealm()

Returns the realm component of this Kerberos principal.

Returns:

the realm component of this Kerberos principal.

hashCode

public int hashCode()

Returns a hashcode for this principal. The hash code is defined to be the result of the following calculation:

  hashCode = getName().hashCode();
 

Specified by:

hashCode in interface Principal

Overrides:

hashCode in class Object

Returns:

a hashCode() for the KerberosPrincipal

See Also:

Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

equals

public boolean equals(Object other)

Compares the specified Object with this Principal for equality. Returns true if the given object is also a KerberosPrincipal and the two KerberosPrincipal instances are equivalent. More formally two KerberosPrincipal instances are equal if the values returned by getName() are equal and the values returned by getNameType() are equal.

Specified by:

equals in interface Principal

Overrides:

equals in class Object

Parameters:

other - the Object to compare to

Returns:

true if the Object passed in represents the same principal as this one, false otherwise.

See Also:

Object.hashCode(), HashMap

getName

public String getName()

The returned string corresponds to the single-string representation of a Kerberos Principal name as specified in Section 2.1 of RFC 1964.

Specified by:

getName in interface Principal

Returns:

the principal name.

getNameType

public int getNameType()

Returns the name type of the KerberosPrincipal. Valid name types are specified in Section 6.2 of RFC4120.

Returns:

the name type.

toString

public String toString()

Description copied from class: Object

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

Specified by:

toString in interface Principal

Overrides:

toString in class Object

Returns:

a string representation of the object.