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org.bouncycastle.openpgp.operator.bc

public Class BcPublicKeyKeyEncryptionMethodGenerator

extends PublicKeyKeyEncryptionMethodGenerator
Class Inheritance
Imports
java.io.IOException, java.math.BigInteger, java.security.SecureRandom, org.bouncycastle.asn1.edec.EdECObjectIdentifiers, org.bouncycastle.bcpg.ECDHPublicBCPGKey, .HashAlgorithmTags, .MPInteger, .PublicKeyAlgorithmTags, .PublicKeyPacket, .SymmetricKeyAlgorithmTags, org.bouncycastle.crypto.AsymmetricBlockCipher, .AsymmetricCipherKeyPair, .AsymmetricCipherKeyPairGenerator, .KeyGenerationParameters, .RawAgreement, .Wrapper, org.bouncycastle.crypto.agreement.ECDHBasicAgreement, .X25519Agreement, .X448Agreement, org.bouncycastle.crypto.generators.ECKeyPairGenerator, .X25519KeyPairGenerator, .X448KeyPairGenerator, org.bouncycastle.crypto.params.AsymmetricKeyParameter, .ECKeyGenerationParameters, .ECPublicKeyParameters, .KeyParameter, .ParametersWithRandom, .X25519KeyGenerationParameters, .X25519PublicKeyParameters, .X448KeyGenerationParameters, .X448PublicKeyParameters, org.bouncycastle.openpgp.PGPException, .PGPPublicKey, org.bouncycastle.openpgp.operator.PGPPad, .PublicKeyKeyEncryptionMethodGenerator, .RFC6637Utils, org.bouncycastle.util.Arrays, .BigIntegers
A method generator for supporting public key based encryption operations.

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static interface
BcPublicKeyKeyEncryptionMethodGenerator.EphPubEncodingOperation

Field Summary

Modifier and TypeField and Description
private BcPGPKeyConverter
keyConverter

private SecureRandom
random

private static final byte
X_HDR

Inherited from org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator:
SESSION_KEY_OBFUSCATION_PROPERTYsessionKeyObfuscationuseWildcardRecipientWILDCARDWILDCARD_FINGERPRINTWILDCARD_KEYID

Constructor Summary

AccessConstructor and Description
public
BcPublicKeyKeyEncryptionMethodGenerator(PGPPublicKey
the public key to use for encryption.
key)

Create a public key encryption method generator with the method to be based on the passed in key.

Method Summary

Modifier and TypeMethod and Description
protected byte[]
encryptSessionInfo(PGPPublicKey
recipients public key
pubKey, byte[]
session-key
sessionKey, byte
for v3: session key algorithm ID; for v6: 0
symAlgId, boolean isV3)

Implements abstract org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator.encryptSessionInfo.

Encrypt a session key using the recipients public key.

private byte[]

Returns:

encrypted session key
encryptSessionInfoWithECDHKey(byte[]
sym alg ID (if v3 PKESK) + session key + 2 octets checksum
sessionInfo, byte[]
shared secret
secret, byte[]
UKM
userKeyingMaterial, byte[]
ephemeral public key encoding
ephPubEncoding, int
hash algorithm
hashAlgorithm, int
symmetric key algorithm
symmetricKeyAlgorithm)

Encrypt the session info.

private byte[]
encryptSessionInfoWithX25519X448Key(PublicKeyPacket pubKeyPacket, byte[] sessionKey, int hashAlgorithm, int symmetricKeyAlgorithm, String algorithmName, AsymmetricCipherKeyPairGenerator gen, KeyGenerationParameters parameters, RawAgreement agreement, AsymmetricKeyParameter cryptoPublicKey, int keySize, BcPublicKeyKeyEncryptionMethodGenerator.EphPubEncodingOperation ephPubEncodingOperation, byte optSymAlgId)

private AsymmetricCipherKeyPair
getAsymmetricCipherKeyPair(AsymmetricCipherKeyPairGenerator gen, KeyGenerationParameters parameters)

private byte[]
getWrapper(int symmetricKeyAlgorithm, KeyParameter key, byte[] sessionData)

public BcPublicKeyKeyEncryptionMethodGenerator

Returns:

the current generator.
setSecureRandom(SecureRandom
the secure random to be used.
random)

Provide a user defined source of randomness.

Inherited from org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator:
createSessionInfoencodeEncryptedSessionInfogenerategetSessionInfosetSessionKeyObfuscationsetUseWildcardKeyIDsetUseWildcardRecipient

Field Detail

keyConverterback to summary
private BcPGPKeyConverter keyConverter
randomback to summary
private SecureRandom random
X_HDRback to summary
private static final byte X_HDR

Constructor Detail

BcPublicKeyKeyEncryptionMethodGeneratorback to summary
public BcPublicKeyKeyEncryptionMethodGenerator(PGPPublicKey key)

Create a public key encryption method generator with the method to be based on the passed in key.

Parameters
key:PGPPublicKey

the public key to use for encryption.

Method Detail

encryptSessionInfoback to summary
protected byte[] encryptSessionInfo(PGPPublicKey pubKey, byte[] sessionKey, byte symAlgId, boolean isV3) throws PGPException

Implements abstract org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator.encryptSessionInfo.

Doc from org.bouncycastle.openpgp.operator.PublicKeyKeyEncryptionMethodGenerator.encryptSessionInfo.

Encrypt a session key using the recipients public key.

Parameters
pubKey:PGPPublicKey

recipients public key

sessionKey:byte[]

session-key

symAlgId:byte

for v3: session key algorithm ID; for v6: 0

Returns:byte[]

encrypted session info

Annotations
@Override
encryptSessionInfoWithECDHKeyback to summary
private byte[] encryptSessionInfoWithECDHKey(byte[] sessionInfo, byte[] secret, byte[] userKeyingMaterial, byte[] ephPubEncoding, int hashAlgorithm, int symmetricKeyAlgorithm) throws IOException, PGPException

Encrypt the session info.

Parameters
sessionInfo:byte[]

sym alg ID (if v3 PKESK) + session key + 2 octets checksum

secret:byte[]

shared secret

userKeyingMaterial:byte[]

UKM

ephPubEncoding:byte[]

ephemeral public key encoding

hashAlgorithm:int

hash algorithm

symmetricKeyAlgorithm:int

symmetric key algorithm

Returns:byte[]

encrypted session key

See Also
Session-Key Encryption using ECDH
encryptSessionInfoWithX25519X448Keyback to summary
private byte[] encryptSessionInfoWithX25519X448Key(PublicKeyPacket pubKeyPacket, byte[] sessionKey, int hashAlgorithm, int symmetricKeyAlgorithm, String algorithmName, AsymmetricCipherKeyPairGenerator gen, KeyGenerationParameters parameters, RawAgreement agreement, AsymmetricKeyParameter cryptoPublicKey, int keySize, BcPublicKeyKeyEncryptionMethodGenerator.EphPubEncodingOperation ephPubEncodingOperation, byte optSymAlgId) throws PGPException
getAsymmetricCipherKeyPairback to summary
private AsymmetricCipherKeyPair getAsymmetricCipherKeyPair(AsymmetricCipherKeyPairGenerator gen, KeyGenerationParameters parameters)
getWrapperback to summary
private byte[] getWrapper(int symmetricKeyAlgorithm, KeyParameter key, byte[] sessionData) throws PGPException
setSecureRandomback to summary
public BcPublicKeyKeyEncryptionMethodGenerator setSecureRandom(SecureRandom random)

Provide a user defined source of randomness.

Parameters
random:SecureRandom

the secure random to be used.

Returns:BcPublicKeyKeyEncryptionMethodGenerator

the current generator.

org.bouncycastle.openpgp.operator.bc back to summary

private Interface BcPublicKeyKeyEncryptionMethodGenerator.EphPubEncodingOperation

Annotations
@FunctionalInterface

Method Summary

Modifier and TypeMethod and Description
public void
getEphPubEncoding(AsymmetricKeyParameter publicKey, byte[] ephPubEncoding)

Method Detail

getEphPubEncodingback to summary
public void getEphPubEncoding(AsymmetricKeyParameter publicKey, byte[] ephPubEncoding)