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.security.NoSuchProviderException;
import java.security.Provider;
import java.security.SecureRandom;
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;
/**
* Class to hold a single master secret key and its subkeys.
* <p>
* Often PGP keyring files consist of multiple master keys, if you are trying to process
* or construct one of these you should use the PGPSecretKeyRingCollection class.
*/
public class PGPSecretKeyRing
extends PGPKeyRing
{
List keys;
List extraPubKeys;
PGPSecretKeyRing(List keys)
{
this(keys, new ArrayList());
}
private PGPSecretKeyRing(List keys, List extraPubKeys)
{
this.keys = keys;
this.extraPubKeys = extraPubKeys;
}
public PGPSecretKeyRing(
byte[] encoding)
throws IOException, PGPException
{
this(new ByteArrayInputStream(encoding));
}
public PGPSecretKeyRing(
InputStream in)
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)));
// 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)));
}
else
{
PublicSubkeyPacket sub = (PublicSubkeyPacket)pIn.readPacket();
TrustPacket subTrust = readOptionalTrustPacket(pIn);
List sigList = readSignaturesAndTrust(pIn);
extraPubKeys.add(new PGPPublicKey(sub, subTrust, sigList));
}
}
}
/**
* Return the public key for the master key.
*
* @return PGPPublicKey
*/
public PGPPublicKey getPublicKey()
{
return ((PGPSecretKey)keys.get(0)).getPublicKey();
}
/**
* 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();
}
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 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);
}
}
/**
* 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 master key and sub keys encrypted
* using a new password and the passed in algorithm.
*
* @param ring the PGPSecretKeyRing to be copied.
* @param oldPassPhrase the current password for key.
* @param newPassPhrase the new password for the key.
* @param newEncAlgorithm the algorithm to be used for the encryption.
* @param rand source of randomness.
* @param provider name of the provider to use
*/
public static PGPSecretKeyRing copyWithNewPassword(
PGPSecretKeyRing ring,
char[] oldPassPhrase,
char[] newPassPhrase,
int newEncAlgorithm,
SecureRandom rand,
String provider)
throws PGPException, NoSuchProviderException
{
return copyWithNewPassword(ring, oldPassPhrase, newPassPhrase, newEncAlgorithm, rand, PGPUtil.getProvider(provider));
}
/**
* Return a copy of the passed in secret key ring, with the master key and sub keys encrypted
* using a new password and the passed in algorithm.
*
* @param ring the PGPSecretKeyRing to be copied.
* @param oldPassPhrase the current password for key.
* @param newPassPhrase the new password for the key.
* @param newEncAlgorithm the algorithm to be used for the encryption.
* @param rand source of randomness.
* @param provider provider to use
*/
public static PGPSecretKeyRing copyWithNewPassword(
PGPSecretKeyRing ring,
char[] oldPassPhrase,
char[] newPassPhrase,
int newEncAlgorithm,
SecureRandom rand,
Provider provider)
throws PGPException
{
List newKeys = new ArrayList(ring.keys.size());
for (Iterator keys = ring.getSecretKeys(); keys.hasNext();)
{
newKeys.add(PGPSecretKey.copyWithNewPassword((PGPSecretKey)keys.next(), oldPassPhrase, newPassPhrase, newEncAlgorithm, rand, provider));
}
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);
}
}