org.bouncycastle.openpgp.PGPPublicKey Maven / Gradle / Ivy
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package org.bouncycastle.openpgp;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cryptlib.CryptlibObjectIdentifiers;
import org.bouncycastle.asn1.gnu.GNUObjectIdentifiers;
import org.bouncycastle.asn1.x9.ECNamedCurveTable;
import org.bouncycastle.asn1.x9.X9ECParametersHolder;
import org.bouncycastle.bcpg.BCPGKey;
import org.bouncycastle.bcpg.BCPGOutputStream;
import org.bouncycastle.bcpg.DSAPublicBCPGKey;
import org.bouncycastle.bcpg.ECPublicBCPGKey;
import org.bouncycastle.bcpg.ElGamalPublicBCPGKey;
import org.bouncycastle.bcpg.KeyIdentifier;
import org.bouncycastle.bcpg.PublicKeyAlgorithmTags;
import org.bouncycastle.bcpg.PublicKeyPacket;
import org.bouncycastle.bcpg.PublicSubkeyPacket;
import org.bouncycastle.bcpg.RSAPublicBCPGKey;
import org.bouncycastle.bcpg.SignatureSubpacketTags;
import org.bouncycastle.bcpg.TrustPacket;
import org.bouncycastle.bcpg.UserAttributePacket;
import org.bouncycastle.bcpg.UserDataPacket;
import org.bouncycastle.bcpg.UserIDPacket;
import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
import org.bouncycastle.util.Arrays;
/**
* general class to handle a PGP public key object.
*/
public class PGPPublicKey
implements PublicKeyAlgorithmTags
{
private static final int[] MASTER_KEY_CERTIFICATION_TYPES = new int[]{PGPSignature.POSITIVE_CERTIFICATION, PGPSignature.CASUAL_CERTIFICATION, PGPSignature.NO_CERTIFICATION, PGPSignature.DEFAULT_CERTIFICATION, PGPSignature.DIRECT_KEY};
PublicKeyPacket publicPk;
TrustPacket trustPk;
List keySigs = new ArrayList ();
List ids = new ArrayList ();
List idTrusts = new ArrayList ();
List idSigs = new ArrayList ();
List subSigs = null;
private KeyIdentifier keyIdentifier;
private int keyStrength;
private void init(KeyFingerPrintCalculator fingerPrintCalculator)
throws PGPException
{
BCPGKey key = publicPk.getKey();
byte[] fingerprint = fingerPrintCalculator.calculateFingerprint(publicPk);
long keyID = PublicKeyPacket.getKeyID(publicPk, fingerprint);
this.keyIdentifier = new KeyIdentifier(fingerprint, keyID);
// key strength
if (publicPk.getVersion() <= PublicKeyPacket.VERSION_3)
{
RSAPublicBCPGKey rK = (RSAPublicBCPGKey)key;
this.keyStrength = rK.getModulus().bitLength();
}
else if (publicPk.getVersion() >= PublicKeyPacket.VERSION_4)
{
if (key instanceof RSAPublicBCPGKey)
{
this.keyStrength = ((RSAPublicBCPGKey)key).getModulus().bitLength();
}
else if (key instanceof DSAPublicBCPGKey)
{
this.keyStrength = ((DSAPublicBCPGKey)key).getP().bitLength();
}
else if (key instanceof ElGamalPublicBCPGKey)
{
this.keyStrength = ((ElGamalPublicBCPGKey)key).getP().bitLength();
}
else if (key instanceof ECPublicBCPGKey)
{
ASN1ObjectIdentifier curveOID = ((ECPublicBCPGKey)key).getCurveOID();
if (curveOID.equals(GNUObjectIdentifiers.Ed25519)
|| curveOID.equals(CryptlibObjectIdentifiers.curvey25519))
{
this.keyStrength = 256;
}
else
{
X9ECParametersHolder ecParameters = ECNamedCurveTable.getByOIDLazy(curveOID);
if (ecParameters != null)
{
this.keyStrength = ecParameters.getCurve().getFieldSize();
}
else
{
this.keyStrength = -1; // unknown
}
}
}
}
}
/**
* Create a PGP public key from a packet descriptor using the passed in fingerPrintCalculator to do calculate
* the fingerprint and keyID.
*
* @param publicKeyPacket packet describing the public key.
* @param fingerPrintCalculator calculator providing the digest support ot create the key fingerprint.
* @throws PGPException if the packet is faulty, or the required calculations fail.
*/
public PGPPublicKey(PublicKeyPacket publicKeyPacket, KeyFingerPrintCalculator fingerPrintCalculator)
throws PGPException
{
this.publicPk = publicKeyPacket;
this.ids = new ArrayList ();
this.idSigs = new ArrayList ();
init(fingerPrintCalculator);
}
/*
* Constructor for a sub-key.
*/
PGPPublicKey(
PublicKeyPacket publicPk,
TrustPacket trustPk,
List sigs,
KeyFingerPrintCalculator fingerPrintCalculator)
throws PGPException
{
this.publicPk = publicPk;
this.trustPk = trustPk;
this.subSigs = sigs;
init(fingerPrintCalculator);
}
PGPPublicKey(
PGPPublicKey key,
TrustPacket trust,
List subSigs)
{
this.publicPk = key.publicPk;
this.trustPk = trust;
this.subSigs = subSigs;
this.keyStrength = key.keyStrength;
this.keyIdentifier = key.keyIdentifier;
}
/**
* Copy constructor.
*
* @param pubKey the public key to copy.
*/
PGPPublicKey(
PGPPublicKey pubKey)
{
this.publicPk = pubKey.publicPk;
this.keySigs = new ArrayList (pubKey.keySigs);
this.ids = new ArrayList (pubKey.ids);
this.idTrusts = new ArrayList (pubKey.idTrusts);
this.idSigs = new ArrayList (pubKey.idSigs.size());
for (int i = 0; i != pubKey.idSigs.size(); i++)
{
this.idSigs.add(new ArrayList ((List )pubKey.idSigs.get(i)));
}
if (pubKey.subSigs != null)
{
this.subSigs = new ArrayList (pubKey.subSigs.size());
this.subSigs.addAll(pubKey.subSigs);
}
this.keyStrength = pubKey.keyStrength;
this.keyIdentifier = pubKey.keyIdentifier;
}
PGPPublicKey(
PublicKeyPacket publicPk,
TrustPacket trustPk,
List keySigs,
List ids,
List idTrusts,
List idSigs,
KeyFingerPrintCalculator fingerPrintCalculator)
throws PGPException
{
this.publicPk = publicPk;
this.trustPk = trustPk;
this.keySigs = keySigs;
this.ids = ids;
this.idTrusts = idTrusts;
this.idSigs = idSigs;
init(fingerPrintCalculator);
}
PGPPublicKey(
PGPPublicKey original,
TrustPacket trustPk,
List keySigs,
List ids,
List idTrusts,
List idSigs)
throws PGPException
{
this.publicPk = original.publicPk;
this.keyStrength = original.keyStrength;
this.keyIdentifier = original.keyIdentifier;
this.trustPk = trustPk;
this.keySigs = keySigs;
this.ids = ids;
this.idTrusts = idTrusts;
this.idSigs = idSigs;
}
/**
* @return the version of this key.
*/
public int getVersion()
{
return publicPk.getVersion();
}
/**
* @return creation time of key.
*/
public Date getCreationTime()
{
return publicPk.getTime();
}
/**
* @return number of valid days from creation time - zero means no
* expiry.
* @deprecated use getValidSeconds(): greater than version 3 keys may be valid for less than a day.
*/
public int getValidDays()
{
if (publicPk.getVersion() > PublicKeyPacket.VERSION_3)
{
long delta = this.getValidSeconds() % (24 * 60 * 60);
int days = (int)(this.getValidSeconds() / (24 * 60 * 60));
if (delta > 0 && days == 0)
{
return 1;
}
else
{
return days;
}
}
else
{
return publicPk.getValidDays();
}
}
/**
* Return the trust data associated with the public key, if present.
*
* @return a byte array with trust data, null otherwise.
*/
public byte[] getTrustData()
{
if (trustPk == null)
{
return null;
}
return Arrays.clone(trustPk.getLevelAndTrustAmount());
}
/**
* @return number of valid seconds from creation time - zero means no
* expiry.
*/
public long getValidSeconds()
{
if (publicPk.getVersion() > PublicKeyPacket.VERSION_3)
{
if (this.isMasterKey())
{
for (int i = 0; i != MASTER_KEY_CERTIFICATION_TYPES.length; i++)
{
long seconds = getExpirationTimeFromSig(true, MASTER_KEY_CERTIFICATION_TYPES[i]);
if (seconds >= 0)
{
return seconds;
}
}
}
else
{
long seconds = getExpirationTimeFromSig(false, PGPSignature.SUBKEY_BINDING);
if (seconds >= 0)
{
return seconds;
}
seconds = getExpirationTimeFromSig(false, PGPSignature.DIRECT_KEY);
if (seconds >= 0)
{
return seconds;
}
}
return 0;
}
else
{
return (long)publicPk.getValidDays() * 24 * 60 * 60;
}
}
private long getExpirationTimeFromSig(
boolean selfSigned,
int signatureType)
{
Iterator signatures = this.getSignaturesOfType(signatureType);
long expiryTime = -1;
long lastDate = -1;
while (signatures.hasNext())
{
PGPSignature sig = (PGPSignature)signatures.next();
if (!selfSigned || sig.getKeyID() == this.getKeyID())
{
PGPSignatureSubpacketVector hashed = sig.getHashedSubPackets();
if (hashed == null)
{
continue;
}
if (!hashed.hasSubpacket(SignatureSubpacketTags.KEY_EXPIRE_TIME))
{
continue;
}
long current = hashed.getKeyExpirationTime();
if (sig.getKeyID() == this.getKeyID())
{
if (sig.getCreationTime().getTime() > lastDate)
{
lastDate = sig.getCreationTime().getTime();
expiryTime = current;
}
}
else
{
if (current == 0 || current > expiryTime)
{
expiryTime = current;
}
}
}
}
return expiryTime;
}
/**
* Return the keyID associated with the public key.
*
* @return long
*/
public long getKeyID()
{
return keyIdentifier.getKeyId();
}
/**
* Return a {@link KeyIdentifier} identifying this key.
*
* @return key identifier
*/
public KeyIdentifier getKeyIdentifier()
{
return keyIdentifier;
}
/**
* Return the fingerprint of the public key.
*
* @return key fingerprint.
*/
public byte[] getFingerprint()
{
return keyIdentifier.getFingerprint();
}
public boolean hasFingerprint(byte[] fingerprint)
{
return keyIdentifier.hasFingerprint(fingerprint);
}
/**
* Return true if this key has an algorithm type that makes it suitable to use for encryption.
*
* Note: with version 4 keys KeyFlags subpackets should also be considered when present for
* determining the preferred use of the key.
*
* @return true if the key algorithm is suitable for encryption.
*/
public boolean isEncryptionKey()
{
int algorithm = publicPk.getAlgorithm();
return ((algorithm == RSA_GENERAL) || (algorithm == RSA_ENCRYPT)
|| (algorithm == ELGAMAL_ENCRYPT) || (algorithm == ELGAMAL_GENERAL)
|| (algorithm == DIFFIE_HELLMAN) || (algorithm == ECDH) || (algorithm == X448) || (algorithm == X25519));
}
/**
* Return true if this could be a master key.
*
* @return true if a master key.
*/
public boolean isMasterKey()
{
// this might seem a bit excessive, but we're also trying to flag something can't be a master key.
return !(publicPk instanceof PublicSubkeyPacket)
&& !(this.isEncryptionKey() && publicPk.getAlgorithm() != PublicKeyAlgorithmTags.RSA_GENERAL);
}
/**
* Return the algorithm code associated with the public key.
*
* @return int
*/
public int getAlgorithm()
{
return publicPk.getAlgorithm();
}
/**
* Return the strength of the key in bits.
*
* @return bit strength of key.
*/
public int getBitStrength()
{
return keyStrength;
}
/**
* Return any userIDs associated with the key.
*
* @return an iterator of Strings.
*/
public Iterator getUserIDs()
{
List temp = new ArrayList ();
for (int i = 0; i != ids.size(); i++)
{
if (ids.get(i) instanceof UserIDPacket)
{
temp.add(((UserIDPacket)ids.get(i)).getID());
}
}
return temp.iterator();
}
/**
* Return any userIDs associated with the key in raw byte form. No attempt is made
* to convert the IDs into Strings.
*
* @return an iterator of byte[].
*/
public Iterator getRawUserIDs()
{
List temp = new ArrayList ();
for (int i = 0; i != ids.size(); i++)
{
if (ids.get(i) instanceof UserIDPacket)
{
temp.add(((UserIDPacket)ids.get(i)).getRawID());
}
}
return temp.iterator();
}
/**
* Return any user attribute vectors associated with the key.
*
* @return an iterator of PGPUserAttributeSubpacketVector objects.
*/
public Iterator getUserAttributes()
{
List temp = new ArrayList ();
for (int i = 0; i != ids.size(); i++)
{
if (ids.get(i) instanceof PGPUserAttributeSubpacketVector)
{
temp.add((PGPUserAttributeSubpacketVector)ids.get(i));
}
}
return temp.iterator();
}
/**
* Return any signatures associated with the passed in id.
*
* @param id the id to be matched.
* @return an iterator of PGPSignature objects.
*/
public Iterator getSignaturesForID(
String id)
{
return getSignaturesForID(new UserIDPacket(id));
}
/**
* Return any signatures associated with the passed in id.
*
* @param rawID the id to be matched in raw byte form.
* @return an iterator of PGPSignature objects.
*/
public Iterator getSignaturesForID(
byte[] rawID)
{
return getSignaturesForID(new UserIDPacket(rawID));
}
/**
* Return any signatures associated with the passed in key identifier keyID.
*
* @param keyID the key id to be matched.
* @return an iterator of PGPSignature objects issued by the key with keyID.
*/
public Iterator getSignaturesForKeyID(
long keyID)
{
List sigs = new ArrayList ();
for (Iterator it = getSignatures(); it.hasNext(); )
{
PGPSignature sig = (PGPSignature)it.next();
if (sig.getKeyID() == keyID)
{
sigs.add(sig);
}
}
return sigs.iterator();
}
public Iterator getSignaturesForKey(KeyIdentifier identifier)
{
List sigs = new ArrayList ();
for (Iterator it = getSignatures(); it.hasNext(); )
{
PGPSignature sig = (PGPSignature)it.next();
if (identifier.isPresentIn(sig.getKeyIdentifiers()))
{
sigs.add(sig);
}
}
return sigs.iterator();
}
private Iterator getSignaturesForID(
UserIDPacket id)
{
List signatures = new ArrayList ();
boolean userIdFound = false;
for (int i = 0; i != ids.size(); i++)
{
if (id.equals(ids.get(i)))
{
userIdFound = true;
signatures.addAll((List )idSigs.get(i));
}
}
return userIdFound ? signatures.iterator() : null;
}
/**
* Return an iterator of signatures associated with the passed in user attributes.
*
* @param userAttributes the vector of user attributes to be matched.
* @return an iterator of PGPSignature objects.
*/
public Iterator getSignaturesForUserAttribute(
PGPUserAttributeSubpacketVector userAttributes)
{
List signatures = new ArrayList ();
boolean attributeFound = false;
for (int i = 0; i != ids.size(); i++)
{
if (userAttributes.equals(ids.get(i)))
{
attributeFound = true;
signatures.addAll((List )idSigs.get(i));
}
}
return attributeFound ? signatures.iterator() : null;
}
/**
* Return signatures of the passed in type that are on this key.
*
* @param signatureType the type of the signature to be returned.
* @return an iterator (possibly empty) of signatures of the given type.
*/
public Iterator getSignaturesOfType(
int signatureType)
{
List l = new ArrayList ();
Iterator it = this.getSignatures();
while (it.hasNext())
{
PGPSignature sig = (PGPSignature)it.next();
if (sig.getSignatureType() == signatureType)
{
l.add(sig);
}
}
return l.iterator();
}
/**
* Return all signatures/certifications associated with this key.
*
* @return an iterator (possibly empty) with all signatures/certifications.
*/
public Iterator getSignatures()
{
if (subSigs == null)
{
List sigs = new ArrayList (keySigs);
for (int i = 0; i != idSigs.size(); i++)
{
sigs.addAll((List )idSigs.get(i));
}
return sigs.iterator();
}
else
{
return subSigs.iterator();
}
}
/**
* Return all signatures/certifications directly associated with this key (ie, not to a user id).
*
* @return an iterator (possibly empty) with all signatures/certifications.
*/
public Iterator getKeySignatures()
{
if (subSigs == null)
{
List sigs = new ArrayList (keySigs);
return sigs.iterator();
}
else
{
return subSigs.iterator();
}
}
public PublicKeyPacket getPublicKeyPacket()
{
return publicPk;
}
public byte[] getEncoded()
throws IOException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
this.encode(bOut, false);
return bOut.toByteArray();
}
/**
* Return an encoding of the key, with trust packets stripped out if forTransfer is true.
*
* @param forTransfer if the purpose of encoding is to send key to other users.
* @return a encoded byte array representing the key.
* @throws IOException in case of encoding error.
*/
public byte[] getEncoded(boolean forTransfer)
throws IOException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
this.encode(bOut, forTransfer);
return bOut.toByteArray();
}
public void encode(
OutputStream outStream)
throws IOException
{
encode(outStream, false);
}
/**
* Encode the key to outStream, with trust packets stripped out if forTransfer is true.
*
* @param outStream stream to write the key encoding to.
* @param forTransfer if the purpose of encoding is to send key to other users.
* @throws IOException in case of encoding error.
*/
public void encode(OutputStream outStream, boolean forTransfer)
throws IOException
{
BCPGOutputStream out = BCPGOutputStream.wrap(outStream);
out.writePacket(publicPk);
if (!forTransfer && trustPk != null)
{
out.writePacket(trustPk);
}
if (subSigs == null) // not a sub-key
{
Util.encodePGPSignatures(out, keySigs, false);
for (int i = 0; i != ids.size(); i++)
{
if (ids.get(i) instanceof UserIDPacket)
{
UserIDPacket id = (UserIDPacket)ids.get(i);
out.writePacket(id);
}
else
{
PGPUserAttributeSubpacketVector v = (PGPUserAttributeSubpacketVector)ids.get(i);
out.writePacket(new UserAttributePacket(v.toSubpacketArray()));
}
if (!forTransfer && idTrusts.get(i) != null)
{
out.writePacket((TrustPacket)idTrusts.get(i));
}
List sigs = (List )idSigs.get(i);
Util.encodePGPSignatures(out, sigs, forTransfer);
}
}
else
{
Util.encodePGPSignatures(out, subSigs, forTransfer);
}
}
/**
* Check whether this (sub)key has a revocation signature on it.
*
* @return boolean indicating whether this (sub)key has been revoked.
* @deprecated this method is poorly named, use hasRevocation().
*/
public boolean isRevoked()
{
return hasRevocation();
}
/**
* Check whether this (sub)key has a revocation signature on it.
*
* @return boolean indicating whether this (sub)key has had a (possibly invalid) revocation attached..
*/
public boolean hasRevocation()
{
int ns = 0;
boolean revoked = false;
if (this.isMasterKey()) // Master key
{
while (!revoked && (ns < keySigs.size()))
{
if (((PGPSignature)keySigs.get(ns++)).getSignatureType() == PGPSignature.KEY_REVOCATION)
{
revoked = true;
}
}
}
else // Sub-key
{
while (!revoked && (ns < subSigs.size()))
{
if (((PGPSignature)subSigs.get(ns++)).getSignatureType() == PGPSignature.SUBKEY_REVOCATION)
{
revoked = true;
}
}
}
return revoked;
}
/**
* Add a certification for an id to the given public key.
*
* @param key the key the certification is to be added to.
* @param rawID the raw bytes making up the user id..
* @param certification the new certification.
* @return the re-certified key.
*/
public static PGPPublicKey addCertification(
PGPPublicKey key,
byte[] rawID,
PGPSignature certification)
{
return addCert(key, new UserIDPacket(rawID), certification);
}
/**
* Add a certification for an id to the given public key.
*
* @param key the key the certification is to be added to.
* @param id the id the certification is associated with.
* @param certification the new certification.
* @return the re-certified key.
*/
public static PGPPublicKey addCertification(
PGPPublicKey key,
String id,
PGPSignature certification)
{
return addCert(key, new UserIDPacket(id), certification);
}
/**
* Add a certification for the given UserAttributeSubpackets to the given public key.
*
* @param key the key the certification is to be added to.
* @param userAttributes the attributes the certification is associated with.
* @param certification the new certification.
* @return the re-certified key.
*/
public static PGPPublicKey addCertification(
PGPPublicKey key,
PGPUserAttributeSubpacketVector userAttributes,
PGPSignature certification)
{
return addCert(key, userAttributes, certification);
}
private static PGPPublicKey addCert(
PGPPublicKey key,
UserDataPacket id,
PGPSignature certification)
{
PGPPublicKey returnKey = new PGPPublicKey(key);
List sigList = null;
for (int i = 0; i != returnKey.ids.size(); i++)
{
if (id.equals(returnKey.ids.get(i)))
{
sigList = (List )returnKey.idSigs.get(i);
}
}
if (sigList != null)
{
sigList.add(certification);
}
else
{
sigList = new ArrayList ();
sigList.add(certification);
returnKey.ids.add(id);
returnKey.idTrusts.add(null);
returnKey.idSigs.add(sigList);
}
return returnKey;
}
/**
* Remove any certifications associated with a given user attribute subpacket
* on a key.
*
* @param key the key the certifications are to be removed from.
* @param userAttributes the attributes to be removed.
* @return the re-certified key, null if the user attribute subpacket was not found on the key.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
PGPUserAttributeSubpacketVector userAttributes)
{
return removeCert(key, userAttributes);
}
/**
* Remove any certifications associated with a given id on a key.
*
* @param key the key the certifications are to be removed from.
* @param id the id that is to be removed.
* @return the re-certified key, null if the id was not found on the key.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
String id)
{
return removeCert(key, new UserIDPacket(id));
}
/**
* Remove any certifications associated with a given id on a key.
*
* @param key the key the certifications are to be removed from.
* @param rawID the id that is to be removed in raw byte form.
* @return the re-certified key, null if the id was not found on the key.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
byte[] rawID)
{
return removeCert(key, new UserIDPacket(rawID));
}
private static PGPPublicKey removeCert(
PGPPublicKey key,
UserDataPacket id)
{
PGPPublicKey returnKey = new PGPPublicKey(key);
boolean found = false;
for (int i = returnKey.ids.size() - 1; i >= 0; i--)
{
if (id.equals(returnKey.ids.get(i)))
{
found = true;
returnKey.ids.remove(i);
returnKey.idTrusts.remove(i);
returnKey.idSigs.remove(i);
}
}
return found ? returnKey : null;
}
/**
* Remove a certification associated with a given id on a key.
*
* @param key the key the certifications are to be removed from.
* @param id the id that the certification is to be removed from (in its raw byte form)
* @param certification the certification to be removed.
* @return the re-certified key, null if the certification was not found.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
byte[] id,
PGPSignature certification)
{
return removeCert(key, new UserIDPacket(id), certification);
}
/**
* Remove a certification associated with a given id on a key.
*
* @param key the key the certifications are to be removed from.
* @param id the id that the certification is to be removed from.
* @param certification the certification to be removed.
* @return the re-certified key, null if the certification was not found.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
String id,
PGPSignature certification)
{
return removeCert(key, new UserIDPacket(id), certification);
}
/**
* Remove a certification associated with a given user attributes on a key.
*
* @param key the key the certifications are to be removed from.
* @param userAttributes the user attributes that the certification is to be removed from.
* @param certification the certification to be removed.
* @return the re-certified key, null if the certification was not found.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
PGPUserAttributeSubpacketVector userAttributes,
PGPSignature certification)
{
return removeCert(key, userAttributes, certification);
}
private static PGPPublicKey removeCert(
PGPPublicKey key,
UserDataPacket id,
PGPSignature certification)
{
PGPPublicKey returnKey = new PGPPublicKey(key);
boolean found = false;
for (int i = 0; i < returnKey.ids.size(); i++)
{
if (id.equals(returnKey.ids.get(i)))
{
found |= ((List )returnKey.idSigs.get(i)).remove(certification);
}
}
return found ? returnKey : null;
}
/**
* Add a revocation or some other key certification to a key.
*
* @param key the key the revocation is to be added to.
* @param certification the key signature to be added.
* @return the new changed public key object.
*/
public static PGPPublicKey addCertification(
PGPPublicKey key,
PGPSignature certification)
{
if (key.isMasterKey())
{
if (certification.getSignatureType() == PGPSignature.SUBKEY_REVOCATION)
{
throw new IllegalArgumentException("signature type incorrect for master key revocation.");
}
}
else
{
if (certification.getSignatureType() == PGPSignature.KEY_REVOCATION)
{
throw new IllegalArgumentException("signature type incorrect for sub-key revocation.");
}
}
PGPPublicKey returnKey = new PGPPublicKey(key);
List sigs = returnKey.subSigs != null ? returnKey.subSigs : returnKey.keySigs;
sigs.add(certification);
return returnKey;
}
/**
* Remove a certification from the key.
*
* @param key the key the certifications are to be removed from.
* @param certification the certification to be removed.
* @return the modified key, null if the certification was not found.
*/
public static PGPPublicKey removeCertification(
PGPPublicKey key,
PGPSignature certification)
{
PGPPublicKey returnKey = new PGPPublicKey(key);
List sigs = returnKey.subSigs != null ? returnKey.subSigs : returnKey.keySigs;
boolean found = sigs.remove(certification);
for (Iterator it = returnKey.idSigs.iterator(); it.hasNext(); )
{
List idSigs = (List )it.next();
found |= idSigs.remove(certification);
}
return found ? returnKey : null;
}
/**
* Merge this the given local public key with another, potentially fresher copy.
* The resulting {@link PGPPublicKey} contains the sum of both keys user-ids and signatures.
*
* If joinTrustPackets is set to true and the copy carries a trust packet,
* the joined key will copy the trust-packet from the copy.
* Otherwise, it will carry the trust packet of the local key.
*
* @param key local public key
* @param copy copy of the public key (e.g. from a key server)
* @param joinTrustPackets if true, trust packets from the copy are copied over into the resulting key
* @param allowSubkeySigsOnNonSubkey if true, subkey signatures on the copy will be present in the merged key, even if key was not a subkey before.
* @return joined key
* @throws PGPException
*/
public static PGPPublicKey join(
PGPPublicKey key,
PGPPublicKey copy,
boolean joinTrustPackets,
boolean allowSubkeySigsOnNonSubkey)
throws PGPException
{
if (key.getKeyID() != copy.getKeyID())
{
throw new IllegalArgumentException("Key-ID mismatch.");
}
TrustPacket trustPk = key.trustPk;
List keySigs = new ArrayList (key.keySigs);
List ids = new ArrayList (key.ids);
List idTrusts = new ArrayList (key.idTrusts);
List idSigs = new ArrayList (key.idSigs);
List subSigs = key.subSigs == null ? null : new ArrayList (key.subSigs);
if (joinTrustPackets)
{
if (copy.trustPk != null)
{
trustPk = copy.trustPk;
}
}
// key signatures
joinPgpSignatureList(copy.keySigs, keySigs, true, true);
// user-ids and id sigs
for (int idIdx = 0; idIdx < copy.ids.size(); idIdx++)
{
UserDataPacket copyId = (UserDataPacket)copy.ids.get(idIdx);
List copyIdSigs = new ArrayList ((List )copy.idSigs.get(idIdx));
TrustPacket copyTrust = (TrustPacket)copy.idTrusts.get(idIdx);
int existingIdIndex = -1;
for (int i = 0; i < ids.size(); i++)
{
UserDataPacket existingId = (UserDataPacket)ids.get(i);
if (existingId.equals(copyId))
{
existingIdIndex = i;
break;
}
}
// new user-id
if (existingIdIndex == -1)
{
ids.add(copyId);
idSigs.add(copyIdSigs);
idTrusts.add(joinTrustPackets ? copyTrust : null);
continue;
}
// existing user-id
if (joinTrustPackets && copyTrust != null)
{
TrustPacket existingTrust = (TrustPacket)idTrusts.get(existingIdIndex);
if (existingTrust == null || Arrays.areEqual(copyTrust.getLevelAndTrustAmount(), existingTrust.getLevelAndTrustAmount()))
{
idTrusts.set(existingIdIndex, copyTrust);
}
}
List existingIdSigs = (List )idSigs.get(existingIdIndex);
joinPgpSignatureList(copyIdSigs, existingIdSigs, false, true);
}
// subSigs
if (copy.subSigs != null)
{
if (subSigs == null && allowSubkeySigsOnNonSubkey)
{
subSigs = new ArrayList (copy.subSigs);
}
else
{
joinPgpSignatureList(copy.subSigs, subSigs, false, subSigs != null);
}
}
PGPPublicKey merged = new PGPPublicKey(key, trustPk, keySigs, ids, idTrusts, idSigs);
merged.subSigs = subSigs;
return merged;
}
private static void joinPgpSignatureList(List source,
List rlt,
boolean needBreak,
boolean isNotNull)
throws PGPException
{
for (Iterator it = source.iterator(); it.hasNext(); )
{
PGPSignature copySubSig = (PGPSignature)it.next();
boolean found = false;
for (int i = 0; isNotNull && i < rlt.size(); i++)
{
PGPSignature existingSubSig = (PGPSignature)rlt.get(i);
if (PGPSignature.isSignatureEncodingEqual(existingSubSig, copySubSig))
{
found = true;
// join existing sig with copy to apply modifications in unhashed subpackets
existingSubSig = PGPSignature.join(existingSubSig, copySubSig);
rlt.set(i, existingSubSig);
break;
}
}
if (found && needBreak)
{
break;
}
else if (!found && isNotNull)
{
rlt.add(copySubSig);
}
}
}
}