org.apache.directory.server.kerberos.shared.keytab

Class KeytabEncoder

java.lang.Object

org.apache.directory.server.kerberos.shared.keytab.KeytabEncoder

public class KeytabEncoder
extends java.lang.Object

Encode keytab fields into a ByteBuffer.

Constructor Summary

Constructors

Constructor and Description
KeytabEncoder()

Method Summary

Modifier and Type	Method and Description
private short	encodeCountedString(java.util.List<byte[]> nameComponentBytes, java.lang.String string) Use a prefixed 16-bit length to encode a String.
private java.nio.ByteBuffer	encodeKeyBlock(EncryptionKey key) Encode a 16-bit encryption type and symmetric key material.
private int	encodeKeytabEntries(java.util.List<java.nio.ByteBuffer> buffers, short version, java.util.List<KeytabEntry> entries) Encode the keytab entries.
private java.nio.ByteBuffer	encodeKeytabEntry(short version, KeytabEntry entry) Encode a "keytab entry," which consists of a principal name, principal type, key version number, and key material.
private java.nio.ByteBuffer	encodePrincipalName(short version, java.lang.String principalName) Encode a principal name.
private short	getKeytabVersion(byte[] version) Tells if the keytabCersion is 0x0501 or 0x0502
java.nio.ByteBuffer	write(byte[] keytabVersion, java.util.List<KeytabEntry> entries) Write the keytab version and entries into a ByteBuffer.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

KeytabEncoder

public KeytabEncoder()

Method Detail

getKeytabVersion

private short getKeytabVersion(byte[] version)

Tells if the keytabCersion is 0x0501 or 0x0502

write

public java.nio.ByteBuffer write(byte[] keytabVersion,
                                 java.util.List<KeytabEntry> entries)

Write the keytab version and entries into a ByteBuffer.

Parameters:

keytabVersion -

entries -

Returns:

The ByteBuffer.

encodeKeytabEntries

private int encodeKeytabEntries(java.util.List<java.nio.ByteBuffer> buffers,
                                short version,
                                java.util.List<KeytabEntry> entries)

Encode the keytab entries. Each entry stores : - the size - the principal name - the type (int, 4 bytes) - the timestamp (int, 4 bytes) - the key version (1 byte) - the key

Parameters:

buffer -

entries -

encodeKeytabEntry

private java.nio.ByteBuffer encodeKeytabEntry(short version,
                                              KeytabEntry entry)

Encode a "keytab entry," which consists of a principal name, principal type, key version number, and key material.

encodePrincipalName

private java.nio.ByteBuffer encodePrincipalName(short version,
                                                java.lang.String principalName)

Encode a principal name.

Parameters:

buffer -

principalName -

encodeKeyBlock

private java.nio.ByteBuffer encodeKeyBlock(EncryptionKey key)

Encode a 16-bit encryption type and symmetric key material. We store the KeyType value ( a short ) and the KeyValue ( a length on a short and the bytes )

encodeCountedString

private short encodeCountedString(java.util.List<byte[]> nameComponentBytes,
                                  java.lang.String string)

Use a prefixed 16-bit length to encode a String. Realm and name components are ASCII encoded text with no zero terminator.