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cryptix.openpgp.packet
Class PGPOnePassSignaturePacket  

java.lang.Object
  cryptix.openpgp.packet.PGPPacket
      cryptix.openpgp.packet.PGPOnePassSignaturePacket

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public class PGPOnePassSignaturePacket

extends PGPPacket

A class representing a one-pass signature packet.

This packet both has a binary and a plaintext form. While RFC 2440 only lists the binary form of this packet, we also support the 'Hash:' armour header key in clearsigned messages.

Because the plaintext form contains less information than the binary form, not all get methods will work with the plaintext form, in fact only the getHashID and the isNested method work. Fortunately these two are also the only useful ones for one pass signatures, so applications are encouraged not to depend on the other information contained in a binary one-pass signature packet.

Version:

$Revision: 1.2 $

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Field Summary
private  byte	algid
private  byte	hashid
private  byte[]	keyid
private  boolean	nested
private  byte	type
private  byte	version

 

Fields inherited from class cryptix.openpgp.packet.PGPPacket

 

Constructor Summary

PGPOnePassSignaturePacket()           Emtpy constructor for binary one pass signature packets This constructor is used by PGPPacketFactory, which calls the decode method to decode a binary one pass signature packet

PGPOnePassSignaturePacket(byte type, byte hashid, byte algid, byte[] keyid, boolean nested)           Constructor for binary one pass signature packets

PGPOnePassSignaturePacket(java.lang.String id, boolean nested)           Constructor for plain-text one pass signature packets

PGPOnePassSignaturePacket(java.lang.String id, boolean nested, cryptix.openpgp.algorithm.PGPAlgorithmFactory factory)           Constructor for plain-text one pass signature packets using a specific PGPAlgorithmFactory

 

Method Summary
void	decodeBody(cryptix.openpgp.io.PGPPacketDataInputStream in, cryptix.openpgp.algorithm.PGPAlgorithmFactory factory)           Decode the packet body
void	encodeBody(cryptix.openpgp.io.PGPPacketDataOutputStream out)           Encode the packet body
boolean	equals(java.lang.Object ssp)           Compare this packet to another one.
byte	getAlgorithmID()           Return the id of the public key algorithm used in the signature
byte	getHashID()           Return the id of the hash algorithm used in the signature
byte[]	getKeyID()           Return the 8 byte / 64 bit key ID for this signing key
byte	getType()           Return the type of the signature
byte	getVersion()           Return the version number of this packet
boolean	isNested()           Return if the message has multiple nested signatures

 

Methods inherited from class cryptix.openpgp.packet.PGPPacket

encode, getForceLengthType, getPacketID, hashCode, isLazy, setPacketID

 

Methods inherited from class java.lang.Object

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

 

Field Detail

version

private byte version

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type

private byte type

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hashid

private byte hashid

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algid

private byte algid

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keyid

private byte[] keyid

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nested

private boolean nested

Constructor Detail

PGPOnePassSignaturePacket

public PGPOnePassSignaturePacket()

Emtpy constructor for binary one pass signature packets This constructor is used by PGPPacketFactory, which calls the decode method to decode a binary one pass signature packet

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PGPOnePassSignaturePacket

public PGPOnePassSignaturePacket(java.lang.String id,
                                 boolean nested)

Constructor for plain-text one pass signature packets

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PGPOnePassSignaturePacket

public PGPOnePassSignaturePacket(java.lang.String id,
                                 boolean nested,
                                 cryptix.openpgp.algorithm.PGPAlgorithmFactory factory)

Constructor for plain-text one pass signature packets using a specific PGPAlgorithmFactory

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PGPOnePassSignaturePacket

public PGPOnePassSignaturePacket(byte type,
                                 byte hashid,
                                 byte algid,
                                 byte[] keyid,
                                 boolean nested)

Constructor for binary one pass signature packets

Method Detail

getHashID

public byte getHashID()

Return the id of the hash algorithm used in the signature

A list of possible values can be found in cryptix.openpgp.algorithm.PGPConstants

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getVersion

public byte getVersion()

Return the version number of this packet

Note: this method does not work for a plaintext one-pass signature packet

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getType

public byte getType()

Return the type of the signature

A list of possible values can be found in cryptix.openpgp.packet.PGPSignatureConstants

Note: this method does not work for a plaintext one-pass signature packet

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getAlgorithmID

public byte getAlgorithmID()

Return the id of the public key algorithm used in the signature

A list of possible values can be found in cryptix.openpgp.algorithm.PGPConstants

Note: this method does not work for a plaintext one-pass signature packet

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getKeyID

public byte[] getKeyID()

Return the 8 byte / 64 bit key ID for this signing key

Note: this method does not work for a plaintext one-pass signature packet

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isNested

public boolean isNested()

Return if the message has multiple nested signatures

RFC 2440 says about this:

[If this method returns true, it] indicates that the next packet is another One-Pass Signature packet that describes another signature to be applied to the same message data.

Note that if a message contains more than one one-pass signature, then the signature packets bracket the message; that is, the first signature packet after the message corresponds to the last one-pass packet and the final signature packet corresponds to the first one- pass packet.

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equals

public boolean equals(java.lang.Object ssp)

Compare this packet to another one.

Specified by:

equals in class PGPPacket

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encodeBody

public void encodeBody(cryptix.openpgp.io.PGPPacketDataOutputStream out)
                throws java.io.IOException

Encode the packet body

Specified by:

encodeBody in class PGPPacket

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decodeBody

public void decodeBody(cryptix.openpgp.io.PGPPacketDataInputStream in,
                       cryptix.openpgp.algorithm.PGPAlgorithmFactory factory)
                throws java.io.IOException,
                       cryptix.openpgp.PGPFatalDataFormatException,
                       cryptix.openpgp.PGPDataFormatException

Decode the packet body

Specified by:

decodeBody in class PGPPacket

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