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The Bouncy Castle Java API for handling the OpenPGP protocol. This jar contains the OpenPGP API for JDK 1.8 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
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package org.bouncycastle.openpgp.operator.bc;
import java.io.IOException;
import java.math.BigInteger;
import java.util.Date;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cryptlib.CryptlibObjectIdentifiers;
import org.bouncycastle.asn1.edec.EdECObjectIdentifiers;
import org.bouncycastle.asn1.gnu.GNUObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.bcpg.BCPGKey;
import org.bouncycastle.bcpg.DSAPublicBCPGKey;
import org.bouncycastle.bcpg.DSASecretBCPGKey;
import org.bouncycastle.bcpg.ECDHPublicBCPGKey;
import org.bouncycastle.bcpg.ECDSAPublicBCPGKey;
import org.bouncycastle.bcpg.ECPublicBCPGKey;
import org.bouncycastle.bcpg.ECSecretBCPGKey;
import org.bouncycastle.bcpg.Ed25519PublicBCPGKey;
import org.bouncycastle.bcpg.Ed25519SecretBCPGKey;
import org.bouncycastle.bcpg.Ed448PublicBCPGKey;
import org.bouncycastle.bcpg.Ed448SecretBCPGKey;
import org.bouncycastle.bcpg.EdDSAPublicBCPGKey;
import org.bouncycastle.bcpg.EdSecretBCPGKey;
import org.bouncycastle.bcpg.ElGamalPublicBCPGKey;
import org.bouncycastle.bcpg.ElGamalSecretBCPGKey;
import org.bouncycastle.bcpg.OctetArrayBCPGKey;
import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
import org.bouncycastle.bcpg.PublicKeyPacket;
import org.bouncycastle.bcpg.RSAPublicBCPGKey;
import org.bouncycastle.bcpg.RSASecretBCPGKey;
import org.bouncycastle.bcpg.X25519PublicBCPGKey;
import org.bouncycastle.bcpg.X25519SecretBCPGKey;
import org.bouncycastle.bcpg.X448PublicBCPGKey;
import org.bouncycastle.bcpg.X448SecretBCPGKey;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.DSAParameters;
import org.bouncycastle.crypto.params.DSAPrivateKeyParameters;
import org.bouncycastle.crypto.params.DSAPublicKeyParameters;
import org.bouncycastle.crypto.params.ECNamedDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.crypto.params.Ed25519PrivateKeyParameters;
import org.bouncycastle.crypto.params.Ed25519PublicKeyParameters;
import org.bouncycastle.crypto.params.Ed448PrivateKeyParameters;
import org.bouncycastle.crypto.params.Ed448PublicKeyParameters;
import org.bouncycastle.crypto.params.ElGamalParameters;
import org.bouncycastle.crypto.params.ElGamalPrivateKeyParameters;
import org.bouncycastle.crypto.params.ElGamalPublicKeyParameters;
import org.bouncycastle.crypto.params.RSAKeyParameters;
import org.bouncycastle.crypto.params.RSAPrivateCrtKeyParameters;
import org.bouncycastle.crypto.params.X25519PrivateKeyParameters;
import org.bouncycastle.crypto.params.X25519PublicKeyParameters;
import org.bouncycastle.crypto.params.X448PrivateKeyParameters;
import org.bouncycastle.crypto.params.X448PublicKeyParameters;
import org.bouncycastle.crypto.util.PrivateKeyFactory;
import org.bouncycastle.crypto.util.PublicKeyFactory;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.math.ec.rfc8032.Ed25519;
import org.bouncycastle.math.ec.rfc8032.Ed448;
import org.bouncycastle.openpgp.PGPAlgorithmParameters;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPKdfParameters;
import org.bouncycastle.openpgp.PGPPrivateKey;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.operator.PGPKeyConverter;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.BigIntegers;
public class BcPGPKeyConverter
extends PGPKeyConverter
{
public PGPPrivateKey getPGPPrivateKey(PGPPublicKey pubKey, AsymmetricKeyParameter privKey)
throws PGPException
{
BCPGKey privPk = getPrivateBCPGKey(pubKey, privKey);
return new PGPPrivateKey(pubKey.getKeyID(), pubKey.getPublicKeyPacket(), privPk);
}
/**
* Create a version 4 PGPPublicKey from the passed in JCA one.
*
* Note: the time passed in affects the value of the key's keyID, so you probably only want
* to do this once for a JCA key, or make sure you keep track of the time you used.
*
*
* @param algorithm asymmetric algorithm type representing the public key.
* @param pubKey actual public key to associate.
* @param time date of creation.
* @throws PGPException on key creation problem.
* @deprecated use versioned {@link #getPGPPublicKey(int, int, PGPAlgorithmParameters, AsymmetricKeyParameter, Date)} instead
*/
@Deprecated
public PGPPublicKey getPGPPublicKey(int algorithm, PGPAlgorithmParameters algorithmParameters, AsymmetricKeyParameter pubKey, Date time)
throws PGPException
{
return getPGPPublicKey(PublicKeyPacket.VERSION_4, algorithm, algorithmParameters, pubKey, time);
}
/**
* Create a PGPPublicKey from the passed in JCA one.
*
* Note: the time passed in affects the value of the key's keyID, so you probably only want
* to do this once for a JCA key, or make sure you keep track of the time you used.
*
*
* @param version key version.
* @param algorithm asymmetric algorithm type representing the public key.
* @param pubKey actual public key to associate.
* @param time date of creation.
* @throws PGPException on key creation problem.
*/
public PGPPublicKey getPGPPublicKey(int version, int algorithm, PGPAlgorithmParameters algorithmParameters, AsymmetricKeyParameter pubKey, Date time)
throws PGPException
{
BCPGKey bcpgKey = getPublicBCPGKey(algorithm, algorithmParameters, pubKey);
return new PGPPublicKey(new PublicKeyPacket(version, algorithm, time, bcpgKey), new BcKeyFingerprintCalculator());
}
public AsymmetricKeyParameter getPrivateKey(PGPPrivateKey privKey)
throws PGPException
{
PublicKeyPacket pubPk = privKey.getPublicKeyPacket();
BCPGKey privPk = privKey.getPrivateKeyDataPacket();
try
{
switch (pubPk.getAlgorithm())
{
case PublicKeyAlgorithmTags.DSA:
{
DSAPublicBCPGKey dsaPub = (DSAPublicBCPGKey)pubPk.getKey();
DSASecretBCPGKey dsaPriv = (DSASecretBCPGKey)privPk;
return new DSAPrivateKeyParameters(dsaPriv.getX(),
new DSAParameters(dsaPub.getP(), dsaPub.getQ(), dsaPub.getG()));
}
case PublicKeyAlgorithmTags.ECDH:
{
ECDHPublicBCPGKey ecdhPub = (ECDHPublicBCPGKey)pubPk.getKey();
// Legacy XDH on Curve25519 (legacy X25519)
// 1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110
if (BcUtil.isX25519(ecdhPub.getCurveOID()))
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(EdECObjectIdentifiers.id_X25519,
Arrays.reverseInPlace(BigIntegers.asUnsignedByteArray(((ECSecretBCPGKey)privPk).getX()))));
}
// Legacy X448 (1.3.101.111)
else if (EdECObjectIdentifiers.id_X448.equals(ecdhPub.getCurveOID()))
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(EdECObjectIdentifiers.id_X448,
Arrays.reverseInPlace(BigIntegers.asUnsignedByteArray(((ECSecretBCPGKey)privPk).getX()))));
}
// NIST, Brainpool etc.
else
{
return implGetPrivateKeyEC(ecdhPub, (ECSecretBCPGKey)privPk);
}
}
// Modern X25519 (1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110)
case PublicKeyAlgorithmTags.X25519:
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(EdECObjectIdentifiers.id_X25519, X25519SecretBCPGKey.LENGTH,
privPk.getEncoded()));
}
// Modern X448 (1.3.101.111)
case PublicKeyAlgorithmTags.X448:
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(EdECObjectIdentifiers.id_X448, X448SecretBCPGKey.LENGTH,
privPk.getEncoded()));
}
case PublicKeyAlgorithmTags.ECDSA:
{
return implGetPrivateKeyEC((ECDSAPublicBCPGKey) pubPk.getKey(), (ECSecretBCPGKey) privPk);
}
// Legacy EdDSA (legacy Ed448, legacy Ed25519)
case PublicKeyAlgorithmTags.EDDSA_LEGACY:
{
// Legacy Ed448 (1.3.101.113)
if (((EdDSAPublicBCPGKey)pubPk.getKey()).getCurveOID().equals(EdECObjectIdentifiers.id_Ed448))
{
return implGetPrivateKeyPKCS8(EdECObjectIdentifiers.id_Ed448, Ed448.SECRET_KEY_SIZE, privPk);
}
// Legacy Ed25519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
return implGetPrivateKeyPKCS8(EdECObjectIdentifiers.id_Ed25519, Ed25519.SECRET_KEY_SIZE, privPk);
}
// Modern Ed22519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
case PublicKeyAlgorithmTags.Ed25519:
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(EdECObjectIdentifiers.id_Ed25519, Ed25519SecretBCPGKey.LENGTH, privPk.getEncoded()));
}
// Modern Ed448 (1.3.101.113)
case PublicKeyAlgorithmTags.Ed448:
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(EdECObjectIdentifiers.id_Ed448, Ed448SecretBCPGKey.LENGTH, privPk.getEncoded()));
}
case PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT:
case PublicKeyAlgorithmTags.ELGAMAL_GENERAL:
{
ElGamalPublicBCPGKey elPub = (ElGamalPublicBCPGKey)pubPk.getKey();
ElGamalSecretBCPGKey elPriv = (ElGamalSecretBCPGKey)privPk;
return new ElGamalPrivateKeyParameters(elPriv.getX(), new ElGamalParameters(elPub.getP(), elPub.getG()));
}
case PublicKeyAlgorithmTags.RSA_ENCRYPT:
case PublicKeyAlgorithmTags.RSA_GENERAL:
case PublicKeyAlgorithmTags.RSA_SIGN:
{
RSAPublicBCPGKey rsaPub = (RSAPublicBCPGKey)pubPk.getKey();
RSASecretBCPGKey rsaPriv = (RSASecretBCPGKey)privPk;
return new RSAPrivateCrtKeyParameters(rsaPriv.getModulus(), rsaPub.getPublicExponent(),
rsaPriv.getPrivateExponent(), rsaPriv.getPrimeP(), rsaPriv.getPrimeQ(), rsaPriv.getPrimeExponentP(),
rsaPriv.getPrimeExponentQ(), rsaPriv.getCrtCoefficient());
}
default:
throw new PGPException("unknown public key algorithm encountered: " + pubPk.getAlgorithm());
}
}
catch (PGPException e)
{
throw e;
}
catch (Exception e)
{
throw new PGPException("Exception constructing key", e);
}
}
public AsymmetricKeyParameter getPublicKey(PGPPublicKey publicKey)
throws PGPException
{
PublicKeyPacket publicPk = publicKey.getPublicKeyPacket();
try
{
switch (publicPk.getAlgorithm())
{
case PublicKeyAlgorithmTags.DSA:
{
DSAPublicBCPGKey dsaK = (DSAPublicBCPGKey)publicPk.getKey();
return new DSAPublicKeyParameters(dsaK.getY(), new DSAParameters(dsaK.getP(), dsaK.getQ(), dsaK.getG()));
}
case PublicKeyAlgorithmTags.ECDH:
{
ECDHPublicBCPGKey ecdhK = (ECDHPublicBCPGKey)publicPk.getKey();
// Legacy XDH on Curve25519 (legacy X25519)
// 1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110
if (BcUtil.isX25519(ecdhK.getCurveOID()))
{
byte[] pEnc = BigIntegers.asUnsignedByteArray(ecdhK.getEncodedPoint());
// skip the 0x40 header byte.
if (pEnc.length < 1 || 0x40 != pEnc[0])
{
throw new IllegalArgumentException("Invalid Curve25519 public key");
}
return implGetPublicKeyX509(EdECObjectIdentifiers.id_X25519, pEnc, 1);
}
// Legacy X448 (1.3.101.111)
else if (ecdhK.getCurveOID().equals(EdECObjectIdentifiers.id_X448))
{
byte[] pEnc = BigIntegers.asUnsignedByteArray(ecdhK.getEncodedPoint());
// skip the 0x40 header byte.
if (pEnc.length < 1 || 0x40 != pEnc[0])
{
throw new IllegalArgumentException("Invalid X448 public key");
}
return implGetPublicKeyX509(EdECObjectIdentifiers.id_X448, pEnc, 1);
}
else
{
return implGetPublicKeyEC(ecdhK);
}
}
// Modern X25519 (1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110)
case PublicKeyAlgorithmTags.X25519:
{
return implGetPublicKeyX509((X25519PublicBCPGKey)publicPk.getKey(), EdECObjectIdentifiers.id_X25519);
}
// Modern X448 (1.3.101.111)
case PublicKeyAlgorithmTags.X448:
{
return implGetPublicKeyX509((X448PublicBCPGKey)publicPk.getKey(), EdECObjectIdentifiers.id_X448);
}
case PublicKeyAlgorithmTags.ECDSA:
{
return implGetPublicKeyEC((ECDSAPublicBCPGKey)publicPk.getKey());
}
// Legacy EdDSA (legacy Ed448, legacy Ed25519)
case PublicKeyAlgorithmTags.EDDSA_LEGACY:
{
EdDSAPublicBCPGKey eddsaK = (EdDSAPublicBCPGKey)publicPk.getKey();
byte[] pEnc = BigIntegers.asUnsignedByteArray(eddsaK.getEncodedPoint());
if (pEnc.length < 1)
{
throw new IllegalArgumentException("Invalid EdDSA public key");
}
// Legacy Ed25519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
if (!eddsaK.getCurveOID().equals(EdECObjectIdentifiers.id_Ed448))
{
return implGetPublicKeyX509(EdECObjectIdentifiers.id_Ed25519, pEnc, pEnc[0] == 0x40 ? 1 : 0);
}
// Legacy Ed448 (1.3.101.113)
if (eddsaK.getCurveOID().equals(EdECObjectIdentifiers.id_Ed448))
{
return implGetPublicKeyX509(EdECObjectIdentifiers.id_Ed448, pEnc, pEnc[0] == 0x40 ? 1 : 0);
}
throw new IllegalArgumentException("Invalid EdDSA public key");
}
// Modern Ed22519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
case PublicKeyAlgorithmTags.Ed25519:
{
return implGetPublicKeyX509((Ed25519PublicBCPGKey)publicPk.getKey(), EdECObjectIdentifiers.id_Ed25519);
}
// Modern Ed448 (1.3.101.113)
case PublicKeyAlgorithmTags.Ed448:
{
return implGetPublicKeyX509((Ed448PublicBCPGKey)publicPk.getKey(), EdECObjectIdentifiers.id_Ed448);
}
case PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT:
case PublicKeyAlgorithmTags.ELGAMAL_GENERAL:
{
ElGamalPublicBCPGKey elK = (ElGamalPublicBCPGKey) publicPk.getKey();
return new ElGamalPublicKeyParameters(elK.getY(), new ElGamalParameters(elK.getP(), elK.getG()));
}
case PublicKeyAlgorithmTags.RSA_ENCRYPT:
case PublicKeyAlgorithmTags.RSA_GENERAL:
case PublicKeyAlgorithmTags.RSA_SIGN:
{
RSAPublicBCPGKey rsaK = (RSAPublicBCPGKey)publicPk.getKey();
return new RSAKeyParameters(false, rsaK.getModulus(), rsaK.getPublicExponent());
}
default:
throw new PGPException("unknown public key algorithm encountered: " + publicKey.getAlgorithm());
}
}
catch (PGPException e)
{
throw e;
}
catch (Exception e)
{
throw new PGPException("exception constructing public key", e);
}
}
private BCPGKey getPrivateBCPGKey(PGPPublicKey pubKey, AsymmetricKeyParameter privKey)
throws PGPException
{
switch (pubKey.getAlgorithm())
{
case PublicKeyAlgorithmTags.DSA:
{
DSAPrivateKeyParameters dsK = (DSAPrivateKeyParameters)privKey;
return new DSASecretBCPGKey(dsK.getX());
}
case PublicKeyAlgorithmTags.ECDH:
{
// Legacy XDH on Curve25519 (legacy X25519)
// 1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110
if (privKey instanceof X25519PrivateKeyParameters)
{
return new ECSecretBCPGKey(new BigInteger(1, Arrays.reverseInPlace(((X25519PrivateKeyParameters)privKey).getEncoded())));
}
// Legacy X448 (1.3.101.111)
else if (privKey instanceof X448PrivateKeyParameters)
{
return new ECSecretBCPGKey(new BigInteger(1, Arrays.reverseInPlace(((X448PrivateKeyParameters)privKey).getEncoded())));
}
// NIST, Brainpool etc.
else
{
ECPrivateKeyParameters ecK = (ECPrivateKeyParameters)privKey;
return new ECSecretBCPGKey(ecK.getD());
}
}
// Modern X25519 (1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110)
case PublicKeyAlgorithmTags.X25519:
{
return new X25519SecretBCPGKey(((X25519PrivateKeyParameters)privKey).getEncoded());
}
// Modern X448 (1.3.101.111)
case PublicKeyAlgorithmTags.X448:
{
return new X448SecretBCPGKey(((X448PrivateKeyParameters)privKey).getEncoded());
}
case PublicKeyAlgorithmTags.ECDSA:
{
ECPrivateKeyParameters ecK = (ECPrivateKeyParameters)privKey;
return new ECSecretBCPGKey(ecK.getD());
}
// Legacy EdDSA
case PublicKeyAlgorithmTags.EDDSA_LEGACY:
{
// Legacy Ed25519 (1.3.101.112 & 1.3.6.1.4.1.11591.15.1)
if (privKey instanceof Ed25519PrivateKeyParameters)
{
return new EdSecretBCPGKey(new BigInteger(1, ((Ed25519PrivateKeyParameters)privKey).getEncoded()));
}
// Legacy Ed448 (1.3.101.113)
else
{
return new EdSecretBCPGKey(new BigInteger(1, ((Ed448PrivateKeyParameters) privKey).getEncoded()));
}
}
// Modern Ed22519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
case PublicKeyAlgorithmTags.Ed25519:
{
return new Ed25519SecretBCPGKey(((Ed25519PrivateKeyParameters)privKey).getEncoded());
}
// Modern Ed448 (1.3.101.113)
case PublicKeyAlgorithmTags.Ed448:
{
return new Ed448SecretBCPGKey(((Ed448PrivateKeyParameters)privKey).getEncoded());
}
case PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT:
case PublicKeyAlgorithmTags.ELGAMAL_GENERAL:
{
ElGamalPrivateKeyParameters esK = (ElGamalPrivateKeyParameters)privKey;
return new ElGamalSecretBCPGKey(esK.getX());
}
case PublicKeyAlgorithmTags.RSA_ENCRYPT:
case PublicKeyAlgorithmTags.RSA_GENERAL:
case PublicKeyAlgorithmTags.RSA_SIGN:
{
RSAPrivateCrtKeyParameters rsK = (RSAPrivateCrtKeyParameters)privKey;
return new RSASecretBCPGKey(rsK.getExponent(), rsK.getP(), rsK.getQ());
}
default:
throw new PGPException("unknown public key algorithm encountered: " + pubKey.getAlgorithm());
}
}
private BCPGKey getPublicBCPGKey(int algorithm, PGPAlgorithmParameters algorithmParameters, AsymmetricKeyParameter pubKey)
throws PGPException
{
switch (algorithm)
{
case PublicKeyAlgorithmTags.RSA_GENERAL:
case PublicKeyAlgorithmTags.RSA_ENCRYPT:
case PublicKeyAlgorithmTags.RSA_SIGN:
{
RSAKeyParameters rK = (RSAKeyParameters)pubKey;
return new RSAPublicBCPGKey(rK.getModulus(), rK.getExponent());
}
case PublicKeyAlgorithmTags.DSA:
{
DSAPublicKeyParameters dK = (DSAPublicKeyParameters)pubKey;
DSAParameters dP = dK.getParameters();
return new DSAPublicBCPGKey(dP.getP(), dP.getQ(), dP.getG(), dK.getY());
}
case PublicKeyAlgorithmTags.ELGAMAL_ENCRYPT:
case PublicKeyAlgorithmTags.ELGAMAL_GENERAL:
{
ElGamalPublicKeyParameters eK = (ElGamalPublicKeyParameters)pubKey;
ElGamalParameters eS = eK.getParameters();
return new ElGamalPublicBCPGKey(eS.getP(), eS.getG(), eK.getY());
}
// NIST, Brainpool, Legacy X25519, Legacy X448
case PublicKeyAlgorithmTags.ECDH:
{
// Legacy X25519 (1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110)
if (pubKey instanceof X25519PublicKeyParameters)
{
byte[] pointEnc = new byte[1 + X25519PublicKeyParameters.KEY_SIZE];
pointEnc[0] = 0x40;
((X25519PublicKeyParameters)pubKey).encode(pointEnc, 1);
PGPKdfParameters kdfParams = implGetKdfParameters(CryptlibObjectIdentifiers.curvey25519, algorithmParameters);
return new ECDHPublicBCPGKey(CryptlibObjectIdentifiers.curvey25519, new BigInteger(1, pointEnc),
kdfParams.getHashAlgorithm(), kdfParams.getSymmetricWrapAlgorithm());
}
// Legacy X448 (1.3.101.111)
if (pubKey instanceof X448PublicKeyParameters)
{
byte[] pointEnc = new byte[1 + X448PublicKeyParameters.KEY_SIZE];
pointEnc[0] = 0x40;
((X448PublicKeyParameters)pubKey).encode(pointEnc, 1);
PGPKdfParameters kdfParams = implGetKdfParameters(EdECObjectIdentifiers.id_X448, algorithmParameters);
return new ECDHPublicBCPGKey(EdECObjectIdentifiers.id_X448, new BigInteger(1, pointEnc),
kdfParams.getHashAlgorithm(), kdfParams.getSymmetricWrapAlgorithm());
}
// NIST, Brainpool etc.
ECPublicKeyParameters ecK = (ECPublicKeyParameters)pubKey;
ECNamedDomainParameters parameters = (ECNamedDomainParameters)ecK.getParameters();
PGPKdfParameters kdfParams = implGetKdfParameters(parameters.getName(), algorithmParameters);
return new ECDHPublicBCPGKey(parameters.getName(), ecK.getQ(), kdfParams.getHashAlgorithm(),
kdfParams.getSymmetricWrapAlgorithm());
}
case PublicKeyAlgorithmTags.ECDSA:
{
ECPublicKeyParameters ecK = (ECPublicKeyParameters)pubKey;
ECNamedDomainParameters parameters = (ECNamedDomainParameters)ecK.getParameters();
return new ECDSAPublicBCPGKey(parameters.getName(), ecK.getQ());
}
// Legacy Ed255519, Legacy Ed448
case PublicKeyAlgorithmTags.EDDSA_LEGACY:
{
// Legacy Ed25519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
if (pubKey instanceof Ed25519PublicKeyParameters)
{
byte[] pointEnc = new byte[1 + Ed25519PublicKeyParameters.KEY_SIZE];
pointEnc[0] = 0x40;
((Ed25519PublicKeyParameters)pubKey).encode(pointEnc, 1);
return new EdDSAPublicBCPGKey(GNUObjectIdentifiers.Ed25519, new BigInteger(1, pointEnc));
}
// Legacy Ed448 (1.3.101.113)
else if (pubKey instanceof Ed448PublicKeyParameters)
{
byte[] pointEnc = new byte[1 + Ed448PublicKeyParameters.KEY_SIZE];
pointEnc[0] = 0x40;
((Ed448PublicKeyParameters)pubKey).encode(pointEnc, 1);
return new EdDSAPublicBCPGKey(EdECObjectIdentifiers.id_Ed448, new BigInteger(1, pointEnc));
}
else
{
throw new PGPException("Unknown LegacyEdDSA key type: " + pubKey.getClass().getName());
}
}
// Modern Ed22519 (1.3.6.1.4.1.11591.15.1 & 1.3.101.112)
case PublicKeyAlgorithmTags.Ed25519:
{
byte[] pointEnc = new byte[Ed25519PublicKeyParameters.KEY_SIZE];
((Ed25519PublicKeyParameters)pubKey).encode(pointEnc, 0);
return new Ed25519PublicBCPGKey(pointEnc);
}
// Modern Ed448 (1.3.101.113)
case PublicKeyAlgorithmTags.Ed448:
{
byte[] pointEnc = new byte[Ed448PublicKeyParameters.KEY_SIZE];
((Ed448PublicKeyParameters)pubKey).encode(pointEnc, 0);
return new Ed448PublicBCPGKey(pointEnc);
}
// Modern X25519 (1.3.6.1.4.1.3029.1.5.1 & 1.3.101.110)
case PublicKeyAlgorithmTags.X25519:
{
byte[] pointEnc = new byte[X25519PublicKeyParameters.KEY_SIZE];
((X25519PublicKeyParameters)pubKey).encode(pointEnc, 0);
return new X25519PublicBCPGKey(pointEnc);
}
// Modern X448 (1.3.101.111)
case PublicKeyAlgorithmTags.X448:
{
byte[] pointEnc = new byte[X448PublicKeyParameters.KEY_SIZE];
((X448PublicKeyParameters)pubKey).encode(pointEnc, 0);
return new X448PublicBCPGKey(pointEnc);
}
default:
{
throw new PGPException("unknown public key algorithm encountered: " + algorithm);
}
}
}
private AsymmetricKeyParameter implGetPublicKeyX509(OctetArrayBCPGKey eddsaK, ASN1ObjectIdentifier algorithm)
throws IOException
{
byte[] pEnc = Arrays.clone(eddsaK.getKey());
return PublicKeyFactory.createKey(new SubjectPublicKeyInfo(new AlgorithmIdentifier(algorithm),
Arrays.copyOfRange(pEnc, 0, pEnc.length)));
}
private AsymmetricKeyParameter implGetPublicKeyX509(ASN1ObjectIdentifier algorithm, byte[] pEnc, int pEncOff)
throws IOException
{
return PublicKeyFactory.createKey(new SubjectPublicKeyInfo(new AlgorithmIdentifier(algorithm),
Arrays.copyOfRange(pEnc, pEncOff, pEnc.length)));
}
private ECNamedDomainParameters implGetParametersEC(ECPublicBCPGKey ecPub)
{
ASN1ObjectIdentifier curveOID = ecPub.getCurveOID();
X9ECParameters x9 = BcUtil.getX9Parameters(curveOID);
return new ECNamedDomainParameters(curveOID, x9.getCurve(), x9.getG(), x9.getN(), x9.getH());
}
private AsymmetricKeyParameter implGetPrivateKeyEC(ECPublicBCPGKey ecPub, ECSecretBCPGKey ecPriv)
throws PGPException
{
ECNamedDomainParameters parameters = implGetParametersEC(ecPub);
return new ECPrivateKeyParameters(ecPriv.getX(), parameters);
}
private AsymmetricKeyParameter implGetPrivateKeyPKCS8(ASN1ObjectIdentifier algorithm, int keySize, BCPGKey privPk)
throws IOException
{
return PrivateKeyFactory.createKey(getPrivateKeyInfo(algorithm, BigIntegers.asUnsignedByteArray(keySize, ((EdSecretBCPGKey)privPk).getX())));
}
private AsymmetricKeyParameter implGetPublicKeyEC(ECPublicBCPGKey ecPub)
throws PGPException
{
ECNamedDomainParameters parameters = implGetParametersEC(ecPub);
ECPoint pubPoint = BcUtil.decodePoint(ecPub.getEncodedPoint(), parameters.getCurve());
return new ECPublicKeyParameters(pubPoint, parameters);
}
}
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