org.bouncycastle.openpgp.PGPSecretKeyRing Maven / Gradle / Ivy
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package org.bouncycastle.openpgp;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.bouncycastle.bcpg.BCPGInputStream;
import org.bouncycastle.bcpg.PacketTags;
import org.bouncycastle.bcpg.PublicSubkeyPacket;
import org.bouncycastle.bcpg.SecretKeyPacket;
import org.bouncycastle.bcpg.SecretSubkeyPacket;
import org.bouncycastle.bcpg.TrustPacket;
import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
import org.bouncycastle.openpgp.operator.PBESecretKeyDecryptor;
import org.bouncycastle.openpgp.operator.PBESecretKeyEncryptor;
import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Iterable;
/**
* Class to hold a single master secret key and its subkeys.
*
* Often PGP keyring files consist of multiple master keys, if you are trying to process
* or construct one of these you should use the {@link PGPSecretKeyRingCollection} class.
*/
public class PGPSecretKeyRing
extends PGPKeyRing
implements Iterable
{
List keys;
List extraPubKeys;
private static List checkKeys(List keys)
{
List rv = new ArrayList(keys.size());
for (int i = 0; i != keys.size(); i++)
{
PGPSecretKey k = (PGPSecretKey)keys.get(i);
if (i == 0)
{
if (!k.isMasterKey())
{
throw new IllegalArgumentException("key 0 must be a master key");
}
}
else
{
if (k.isMasterKey())
{
throw new IllegalArgumentException("key 0 can be only master key");
}
}
rv.add(k);
}
return rv;
}
/**
* Base constructor from a list of keys representing a secret key ring (a master key and its
* associated sub-keys).
*
* @param secKeys the list of keys making up the ring.
*/
public PGPSecretKeyRing(List secKeys)
{
this(checkKeys(secKeys), new ArrayList());
}
private PGPSecretKeyRing(List keys, List extraPubKeys)
{
this.keys = keys;
this.extraPubKeys = extraPubKeys;
}
public PGPSecretKeyRing(
byte[] encoding,
KeyFingerPrintCalculator fingerPrintCalculator)
throws IOException, PGPException
{
this(new ByteArrayInputStream(encoding), fingerPrintCalculator);
}
public PGPSecretKeyRing(
InputStream in,
KeyFingerPrintCalculator fingerPrintCalculator)
throws IOException, PGPException
{
this.keys = new ArrayList();
this.extraPubKeys = new ArrayList();
BCPGInputStream pIn = wrap(in);
int initialTag = pIn.nextPacketTag();
if (initialTag != PacketTags.SECRET_KEY && initialTag != PacketTags.SECRET_SUBKEY)
{
throw new IOException(
"secret key ring doesn't start with secret key tag: " +
"tag 0x" + Integer.toHexString(initialTag));
}
SecretKeyPacket secret = (SecretKeyPacket)pIn.readPacket();
//
// ignore GPG comment packets if found.
//
while (pIn.nextPacketTag() == PacketTags.EXPERIMENTAL_2)
{
pIn.readPacket();
}
TrustPacket trust = readOptionalTrustPacket(pIn);
// revocation and direct signatures
List keySigs = readSignaturesAndTrust(pIn);
List ids = new ArrayList();
List idTrusts = new ArrayList();
List idSigs = new ArrayList();
readUserIDs(pIn, ids, idTrusts, idSigs);
keys.add(new PGPSecretKey(secret, new PGPPublicKey(secret.getPublicKeyPacket(), trust, keySigs, ids, idTrusts, idSigs, fingerPrintCalculator)));
// Read subkeys
while (pIn.nextPacketTag() == PacketTags.SECRET_SUBKEY
|| pIn.nextPacketTag() == PacketTags.PUBLIC_SUBKEY)
{
if (pIn.nextPacketTag() == PacketTags.SECRET_SUBKEY)
{
SecretSubkeyPacket sub = (SecretSubkeyPacket)pIn.readPacket();
//
// ignore GPG comment packets if found.
//
while (pIn.nextPacketTag() == PacketTags.EXPERIMENTAL_2)
{
pIn.readPacket();
}
TrustPacket subTrust = readOptionalTrustPacket(pIn);
List sigList = readSignaturesAndTrust(pIn);
keys.add(new PGPSecretKey(sub, new PGPPublicKey(sub.getPublicKeyPacket(), subTrust, sigList, fingerPrintCalculator)));
}
else
{
PublicSubkeyPacket sub = (PublicSubkeyPacket)pIn.readPacket();
TrustPacket subTrust = readOptionalTrustPacket(pIn);
List sigList = readSignaturesAndTrust(pIn);
extraPubKeys.add(new PGPPublicKey(sub, subTrust, sigList, fingerPrintCalculator));
}
}
}
/**
* Return the public key for the master key.
*
* @return PGPPublicKey
*/
public PGPPublicKey getPublicKey()
{
return ((PGPSecretKey)keys.get(0)).getPublicKey();
}
/**
* Return the public key referred to by the passed in keyID if it
* is present.
*
* @param keyID the full keyID of the key of interest.
* @return PGPPublicKey with matching keyID, null if it is not present.
*/
public PGPPublicKey getPublicKey(
long keyID)
{
PGPSecretKey key = getSecretKey(keyID);
if (key != null)
{
return key.getPublicKey();
}
for (int i = 0; i != extraPubKeys.size(); i++)
{
PGPPublicKey k = (PGPPublicKey)keys.get(i);
if (keyID == k.getKeyID())
{
return k;
}
}
return null;
}
/**
* Return the public key with the passed in fingerprint if it
* is present.
*
* @param fingerprint the full fingerprint of the key of interest.
* @return PGPPublicKey with the matching fingerprint, null if it is not present.
*/
public PGPPublicKey getPublicKey(byte[] fingerprint)
{
PGPSecretKey key = getSecretKey(fingerprint);
if (key != null)
{
return key.getPublicKey();
}
for (int i = 0; i != extraPubKeys.size(); i++)
{
PGPPublicKey k = (PGPPublicKey)keys.get(i);
if (Arrays.areEqual(fingerprint, k.getFingerprint()))
{
return k;
}
}
return null;
}
/**
* Return any keys carrying a signature issued by the key represented by keyID.
*
* @param keyID the key id to be matched against.
* @return an iterator (possibly empty) of PGPPublicKey objects carrying signatures from keyID.
*/
public Iterator getKeysWithSignaturesBy(long keyID)
{
List keysWithSigs = new ArrayList();
for (Iterator keyIt = getPublicKeys(); keyIt.hasNext();)
{
PGPPublicKey k = (PGPPublicKey)keyIt.next();
Iterator sigIt = k.getSignaturesForKeyID(keyID);
if (sigIt.hasNext())
{
keysWithSigs.add(k);
}
}
return keysWithSigs.iterator();
}
/**
* Return an iterator containing all the public keys.
*
* @return Iterator
*/
public Iterator getPublicKeys()
{
List pubKeys = new ArrayList();
for (Iterator it = getSecretKeys(); it.hasNext();)
{
pubKeys.add(((PGPSecretKey)it.next()).getPublicKey());
}
pubKeys.addAll(extraPubKeys);
return Collections.unmodifiableList(pubKeys).iterator();
}
/**
* Return the master private key.
*
* @return PGPSecretKey
*/
public PGPSecretKey getSecretKey()
{
return ((PGPSecretKey)keys.get(0));
}
/**
* Return an iterator containing all the secret keys.
*
* @return Iterator
*/
public Iterator getSecretKeys()
{
return Collections.unmodifiableList(keys).iterator();
}
/**
* Return the secret key referred to by the passed in keyID if it
* is present.
*
* @param keyID the full keyID of the key of interest.
* @return PGPSecretKey with matching keyID, null if it is not present.
*/
public PGPSecretKey getSecretKey(
long keyID)
{
for (int i = 0; i != keys.size(); i++)
{
PGPSecretKey k = (PGPSecretKey)keys.get(i);
if (keyID == k.getKeyID())
{
return k;
}
}
return null;
}
/**
* Return the secret key associated with the passed in fingerprint if it
* is present.
*
* @param fingerprint the full fingerprint of the key of interest.
* @return PGPSecretKey with the matching fingerprint, null if it is not present.
*/
public PGPSecretKey getSecretKey(byte[] fingerprint)
{
for (int i = 0; i != keys.size(); i++)
{
PGPSecretKey k = (PGPSecretKey)keys.get(i);
if (Arrays.areEqual(fingerprint, k.getPublicKey().getFingerprint()))
{
return k;
}
}
return null;
}
/**
* Return an iterator of the public keys in the secret key ring that
* have no matching private key. At the moment only personal certificate data
* appears in this fashion.
*
* @return iterator of unattached, or extra, public keys.
*/
public Iterator getExtraPublicKeys()
{
return extraPubKeys.iterator();
}
public byte[] getEncoded()
throws IOException
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
this.encode(bOut);
return bOut.toByteArray();
}
public void encode(
OutputStream outStream)
throws IOException
{
for (int i = 0; i != keys.size(); i++)
{
PGPSecretKey k = (PGPSecretKey)keys.get(i);
k.encode(outStream);
}
for (int i = 0; i != extraPubKeys.size(); i++)
{
PGPPublicKey k = (PGPPublicKey)extraPubKeys.get(i);
k.encode(outStream);
}
}
/**
* Support method for Iterable where available.
*/
public Iterator iterator()
{
return getSecretKeys();
}
/**
* Replace the public key set on the secret ring with the corresponding key off the public ring.
*
* @param secretRing secret ring to be changed.
* @param publicRing public ring containing the new public key set.
*/
public static PGPSecretKeyRing replacePublicKeys(PGPSecretKeyRing secretRing, PGPPublicKeyRing publicRing)
{
List newList = new ArrayList(secretRing.keys.size());
for (Iterator it = secretRing.keys.iterator(); it.hasNext();)
{
PGPSecretKey sk = (PGPSecretKey)it.next();
PGPPublicKey pk = publicRing.getPublicKey(sk.getKeyID());
newList.add(PGPSecretKey.replacePublicKey(sk, pk));
}
return new PGPSecretKeyRing(newList);
}
/**
* Return a copy of the passed in secret key ring, with the private keys (where present) associated with the master key and sub keys
* are encrypted using a new password and the passed in algorithm.
*
* @param ring the PGPSecretKeyRing to be copied.
* @param oldKeyDecryptor the current decryptor based on the current password for key.
* @param newKeyEncryptor a new encryptor based on a new password for encrypting the secret key material.
* @return the updated key ring.
*/
public static PGPSecretKeyRing copyWithNewPassword(
PGPSecretKeyRing ring,
PBESecretKeyDecryptor oldKeyDecryptor,
PBESecretKeyEncryptor newKeyEncryptor)
throws PGPException
{
List newKeys = new ArrayList(ring.keys.size());
for (Iterator keys = ring.getSecretKeys(); keys.hasNext();)
{
PGPSecretKey key = (PGPSecretKey)keys.next();
if (key.isPrivateKeyEmpty())
{
newKeys.add(key);
}
else
{
newKeys.add(PGPSecretKey.copyWithNewPassword(key, oldKeyDecryptor, newKeyEncryptor));
}
}
return new PGPSecretKeyRing(newKeys, ring.extraPubKeys);
}
/**
* Returns a new key ring with the secret key passed in either added or
* replacing an existing one with the same key ID.
*
* @param secRing the secret key ring to be modified.
* @param secKey the secret key to be added.
* @return a new secret key ring.
*/
public static PGPSecretKeyRing insertSecretKey(
PGPSecretKeyRing secRing,
PGPSecretKey secKey)
{
List keys = new ArrayList(secRing.keys);
boolean found = false;
boolean masterFound = false;
for (int i = 0; i != keys.size();i++)
{
PGPSecretKey key = (PGPSecretKey)keys.get(i);
if (key.getKeyID() == secKey.getKeyID())
{
found = true;
keys.set(i, secKey);
}
if (key.isMasterKey())
{
masterFound = true;
}
}
if (!found)
{
if (secKey.isMasterKey())
{
if (masterFound)
{
throw new IllegalArgumentException("cannot add a master key to a ring that already has one");
}
keys.add(0, secKey);
}
else
{
keys.add(secKey);
}
}
return new PGPSecretKeyRing(keys, secRing.extraPubKeys);
}
/**
* Returns a new key ring with the secret key passed in removed from the
* key ring.
*
* @param secRing the secret key ring to be modified.
* @param secKey the secret key to be removed.
* @return a new secret key ring, or null if secKey is not found.
*/
public static PGPSecretKeyRing removeSecretKey(
PGPSecretKeyRing secRing,
PGPSecretKey secKey)
{
List keys = new ArrayList(secRing.keys);
boolean found = false;
for (int i = 0; i < keys.size();i++)
{
PGPSecretKey key = (PGPSecretKey)keys.get(i);
if (key.getKeyID() == secKey.getKeyID())
{
found = true;
keys.remove(i);
}
}
if (!found)
{
return null;
}
return new PGPSecretKeyRing(keys, secRing.extraPubKeys);
}
}