Package org.bouncycastle.bcpg

Class PublicKeyPacket

java.lang.Object

org.bouncycastle.bcpg.Packet

org.bouncycastle.bcpg.ContainedPacket

org.bouncycastle.bcpg.PublicKeyPacket

All Implemented Interfaces:

PacketTags, PublicKeyAlgorithmTags, org.bouncycastle.util.Encodable

Direct Known Subclasses:

PublicSubkeyPacket

public class PublicKeyPacket
extends ContainedPacket
implements PublicKeyAlgorithmTags

Base class for OpenPGP public (primary) keys. The public key packet holds the public parameters of an OpenPGP key pair. An OpenPGP certificate (transferable public key) consists of one primary key and optionally multiple subkey packets.

See Also:

• RFC4880 - Public-Key Packet
• RFC9580 - Public-Key Packet
• LibrePGP - Public-Key Packet

Field Summary

Fields

Modifier and Type	Field	Description
static final int	LIBREPGP_5	Non-Standard LibrePGP introduced v5, which is only supported by a subset of vendors.
static final int	VERSION_3	OpenPGP v3 keys are deprecated.
static final int	VERSION_4	OpenPGP v4 keys are (at the time of writing) widely used, but are subject to some attacks.
static final int	VERSION_6	OpenPGP v6 keys are newly introduced.

Fields inherited from interface org.bouncycastle.bcpg.PacketTags

AEAD_ENC_DATA, COMPRESSED_DATA, EXPERIMENTAL_1, EXPERIMENTAL_2, EXPERIMENTAL_3, EXPERIMENTAL_4, LITERAL_DATA, MARKER, MOD_DETECTION_CODE, ONE_PASS_SIGNATURE, PADDING, PUBLIC_KEY, PUBLIC_KEY_ENC_SESSION, PUBLIC_SUBKEY, RESERVED, SECRET_KEY, SECRET_SUBKEY, SIGNATURE, SYM_ENC_INTEGRITY_PRO, SYMMETRIC_KEY_ENC, SYMMETRIC_KEY_ENC_SESSION, TRUST, USER_ATTRIBUTE, USER_ID

Fields inherited from interface org.bouncycastle.bcpg.PublicKeyAlgorithmTags

AEDH, AEDSA, DIFFIE_HELLMAN, DSA, EC, ECDH, ECDSA, Ed25519, Ed448, EDDSA, EDDSA_LEGACY, ELGAMAL_ENCRYPT, ELGAMAL_GENERAL, EXPERIMENTAL_1, EXPERIMENTAL_10, EXPERIMENTAL_11, EXPERIMENTAL_2, EXPERIMENTAL_3, EXPERIMENTAL_4, EXPERIMENTAL_5, EXPERIMENTAL_6, EXPERIMENTAL_7, EXPERIMENTAL_8, EXPERIMENTAL_9, RSA_ENCRYPT, RSA_GENERAL, RSA_SIGN, X25519, X448

Constructor Summary

Constructors

Constructor	Description
PublicKeyPacket(int version, int algorithm, Date time, BCPGKey key)	Construct an OpenPGP public primary key packet.
PublicKeyPacket(int algorithm, Date time, BCPGKey key)	Deprecated. use versioned PublicKeyPacket(int, int, Date, BCPGKey) instead

Method Summary

Modifier and Type	Method	Description
void	encode(BCPGOutputStream out)	Encode the packet to the OpenPGP BCPGOutputStream.
int	getAlgorithm()	Return the algorithm id of the public key.
byte[]	getEncodedContents()	Return the encoded packet contents without the packet frame.
BCPGKey	getKey()	Return the key object.
static long	getKeyID(PublicKeyPacket publicPk, byte[] fingerprint)
Date	getTime()	Return the keys creation time.
int	getValidDays()	Deprecated. v4 and v6 keys instead signal their expiration time via the KeyExpirationTime signature subpacket.
int	getVersion()	Return the packet version.

Methods inherited from class org.bouncycastle.bcpg.ContainedPacket

getEncoded, getEncoded

Methods inherited from class org.bouncycastle.bcpg.Packet

getPacketTag, hasNewPacketFormat, isCritical

Methods inherited from class java.lang.Object

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

Field Details

VERSION_3

public static final int VERSION_3

OpenPGP v3 keys are deprecated. They can only be used with RSA.

See Also:

• OpenPGP - Version 3 Public Keys
• Constant Field Values

VERSION_4

public static final int VERSION_4

OpenPGP v4 keys are (at the time of writing) widely used, but are subject to some attacks.

See Also:

• OpenPGP - Version 4 Public Keys
• Constant Field Values

LIBREPGP_5

public static final int LIBREPGP_5

Non-Standard LibrePGP introduced v5, which is only supported by a subset of vendors.

See Also:

• Constant Field Values

VERSION_6

public static final int VERSION_6

OpenPGP v6 keys are newly introduced.

See Also:

• OpenPGP - Version 6 Public Keys
• Constant Field Values

Constructor Details

PublicKeyPacket

@Deprecated
public PublicKeyPacket(int algorithm,
 Date time,
 BCPGKey key)

Deprecated.

use versioned PublicKeyPacket(int, int, Date, BCPGKey) instead

Construct version 4 public primary key packet.

Parameters:

algorithm - public key algorithm id

time - creation time

key - key object

PublicKeyPacket

public PublicKeyPacket(int version,
 int algorithm,
 Date time,
 BCPGKey key)

Construct an OpenPGP public primary key packet.

Parameters:

version - packet version

algorithm - public key algorithm id

time - creation time

key - key object

Method Details

getVersion

public int getVersion()

Return the packet version.

Returns:

packet version

getAlgorithm

public int getAlgorithm()

Return the algorithm id of the public key.

Returns:

algorithm id

getValidDays

public int getValidDays()

Deprecated.

v4 and v6 keys instead signal their expiration time via the KeyExpirationTime signature subpacket.

Only for v3 keys - The time in days since the keys creation, during which the key is valid.

Returns:

v3 key validity period in days since creation.

getTime

public Date getTime()

Return the keys creation time.

Returns:

creation time of the key

getKey

public BCPGKey getKey()

Return the key object.

Returns:

key

getEncodedContents

public byte[] getEncodedContents()
                          throws IOException

Return the encoded packet contents without the packet frame.

Returns:

encoded packet contents

Throws:

IOException

encode

public void encode(BCPGOutputStream out)
            throws IOException

Encode the packet to the OpenPGP BCPGOutputStream. If the BCPGOutputStream packet format is set to PacketFormat.ROUNDTRIP, the result of Packet.hasNewPacketFormat() determines, which packet format is used to encode the packet. Otherwise, the BCPGOutputStream dictates which format to use.

Specified by:

encode in class ContainedPacket

Parameters:

out - packet output stream

Throws:

IOException

getKeyID

public static long getKeyID(PublicKeyPacket publicPk,
 byte[] fingerprint)