diff options
Diffstat (limited to 'libjava/classpath/gnu/javax/crypto/keyring/EnvelopeEntry.java')
| -rw-r--r-- | libjava/classpath/gnu/javax/crypto/keyring/EnvelopeEntry.java | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/javax/crypto/keyring/EnvelopeEntry.java b/libjava/classpath/gnu/javax/crypto/keyring/EnvelopeEntry.java new file mode 100644 index 00000000000..25b1dc2a04d --- /dev/null +++ b/libjava/classpath/gnu/javax/crypto/keyring/EnvelopeEntry.java @@ -0,0 +1,398 @@ +/* EnvelopeEntry.java -- + Copyright (C) 2003, 2006 Free Software Foundation, Inc. + +This file is a part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at +your option) any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; if not, write to the Free Software +Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 +USA + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.javax.crypto.keyring; + +import java.io.ByteArrayOutputStream; +import java.io.DataInputStream; +import java.io.DataOutputStream; +import java.io.IOException; + +import java.util.ArrayList; +import java.util.Date; +import java.util.Iterator; +import java.util.LinkedList; +import java.util.List; +import java.util.StringTokenizer; + +/** + * An envelope entry is a generic container for some number of primitive + * and other envelope entries. + */ +public abstract class EnvelopeEntry extends Entry +{ + + // Fields. + // ------------------------------------------------------------------------ + + /** The envelope that contains this one (if any). */ + protected EnvelopeEntry containingEnvelope; + + /** The contained entries. */ + protected List entries; + + // Constructor. + // ------------------------------------------------------------------------ + + public EnvelopeEntry(int type, Properties properties) + { + super(type, properties); + entries = new LinkedList(); + if (this.properties.get("alias-list") != null) + { + this.properties.remove("alias-list"); + } + } + + protected EnvelopeEntry(int type) + { + super(type); + entries = new LinkedList(); + } + + // Instance methods. + // ------------------------------------------------------------------------ + + /** + * Adds an entry to this envelope. + * + * @param entry The entry to add. + */ + public void add(Entry entry) + { + if (!containsEntry(entry)) + { + if (entry instanceof EnvelopeEntry) + { + ((EnvelopeEntry) entry).setContainingEnvelope(this); + } + entries.add(entry); + payload = null; + makeAliasList(); + } + } + + /** + * Tests if this envelope contains a primitive entry with the + * given alias. + * + * @param alias The alias to test. + * @return True if this envelope (or one of the contained envelopes) + * contains a primitive entry with the given alias. + */ + public boolean containsAlias(String alias) + { + String aliases = getAliasList(); + if (aliases == null) + { + return false; + } + StringTokenizer tok = new StringTokenizer(aliases, ";"); + while (tok.hasMoreTokens()) + { + if (tok.nextToken().equals(alias)) + { + return true; + } + } + return false; + } + + /** + * Tests if this envelope contains the given entry. + * + * @param entry The entry to test. + * @return True if this envelope contains the given entry. + */ + public boolean containsEntry(Entry entry) + { + if (entry instanceof EnvelopeEntry) + { + return entries.contains(entry); + } + else if (entry instanceof PrimitiveEntry) + { + for (Iterator it = entries.iterator(); it.hasNext();) + { + Entry e = (Entry) it.next(); + if (e.equals(entry)) + return true; + if ((e instanceof EnvelopeEntry) + && ((EnvelopeEntry) e).containsEntry(entry)) + return true; + } + } + return false; + } + + /** + * Returns a copy of all entries this envelope contains. + * + * @return All contained entries. + */ + public List getEntries() + { + return new ArrayList(entries); + } + + /** + * Gets all primitive entries that have the given alias. If there + * are any masked entries that contain the given alias, they will + * be returned as well. + * + * @param alias The alias of the entries to get. + * @return A list of all primitive entries that have the given alias. + */ + public List get(String alias) + { + List result = new LinkedList(); + for (Iterator it = entries.iterator(); it.hasNext();) + { + Entry e = (Entry) it.next(); + if (e instanceof EnvelopeEntry) + { + if (!((EnvelopeEntry) e).containsAlias(alias)) + { + continue; + } + if (e instanceof MaskableEnvelopeEntry) + { + if (((MaskableEnvelopeEntry) e).isMasked()) + { + result.add(e); + continue; + } + } + result.addAll(((EnvelopeEntry) e).get(alias)); + } + else if (e instanceof PrimitiveEntry) + { + if (((PrimitiveEntry) e).getAlias().equals(alias)) + { + result.add(e); + } + } + } + return result; + } + + /** + * Returns the list of all aliases contained by this envelope, + * separated by a semicolon (';'). + * + * @return The list of aliases. + */ + public String getAliasList() + { + String list = properties.get("alias-list"); + if (list == null) + { + return ""; + } + else + { + return list; + } + } + + /** + * Removes the specified entry. + * + * @param entry The entry. + * @return True if an entry was removed. + */ + public boolean remove(Entry entry) + { + boolean ret = false; + for (Iterator it = entries.iterator(); it.hasNext();) + { + Entry e = (Entry) it.next(); + if (e instanceof EnvelopeEntry) + { + if (e == entry) + { + it.remove(); + ret = true; + break; + } + if (((EnvelopeEntry) e).remove(entry)) + { + ret = true; + break; + } + } + else if (e instanceof PrimitiveEntry) + { + if (((PrimitiveEntry) e).equals(entry)) + { + it.remove(); + ret = true; + break; + } + } + } + if (ret) + { + payload = null; + makeAliasList(); + } + return ret; + } + + /** + * Removes all primitive entries that have the specified alias. + * + * @param alias The alias of the entries to remove. + */ + public void remove(String alias) + { + for (Iterator it = entries.iterator(); it.hasNext();) + { + Entry e = (Entry) it.next(); + if (e instanceof EnvelopeEntry) + { + ((EnvelopeEntry) e).remove(alias); + } + else if (e instanceof PrimitiveEntry) + { + if (((PrimitiveEntry) e).getAlias().equals(alias)) + { + it.remove(); + } + } + } + payload = null; + makeAliasList(); + } + + // Protected methods. + // ------------------------------------------------------------------------ + + protected void encodePayload() throws IOException + { + ByteArrayOutputStream bout = new ByteArrayOutputStream(1024); + DataOutputStream out = new DataOutputStream(bout); + for (Iterator it = entries.iterator(); it.hasNext();) + { + ((Entry) it.next()).encode(out); + } + } + + protected void setContainingEnvelope(EnvelopeEntry e) + { + if (containingEnvelope != null) + { + throw new IllegalArgumentException("envelopes may not be shared"); + } + containingEnvelope = e; + } + + protected void decodeEnvelope(DataInputStream in) throws IOException + { + while (true) + { + int type = in.read(); + switch (type) + { + case EncryptedEntry.TYPE: + add(EncryptedEntry.decode(in)); + break; + case PasswordEncryptedEntry.TYPE: + add(PasswordEncryptedEntry.decode(in)); + break; + case PasswordAuthenticatedEntry.TYPE: + add(PasswordAuthenticatedEntry.decode(in)); + break; + case AuthenticatedEntry.TYPE: + add(AuthenticatedEntry.decode(in)); + break; + case CompressedEntry.TYPE: + add(CompressedEntry.decode(in)); + break; + case CertificateEntry.TYPE: + add(CertificateEntry.decode(in)); + break; + case PublicKeyEntry.TYPE: + add(PublicKeyEntry.decode(in)); + break; + case PrivateKeyEntry.TYPE: + add(PrivateKeyEntry.decode(in)); + break; + case CertPathEntry.TYPE: + add(CertPathEntry.decode(in)); + break; + case BinaryDataEntry.TYPE: + add(BinaryDataEntry.decode(in)); + break; + case -1: + return; + default: + throw new MalformedKeyringException("unknown type " + type); + } + } + } + + // Own methods. + // ------------------------------------------------------------------------ + + private void makeAliasList() + { + if (entries.isEmpty()) + return; + StringBuffer buf = new StringBuffer(); + for (Iterator it = entries.iterator(); it.hasNext();) + { + Entry entry = (Entry) it.next(); + if (entry instanceof EnvelopeEntry) + { + buf.append(((EnvelopeEntry) entry).getAliasList()); + } + else if (entry instanceof PrimitiveEntry) + { + buf.append(((PrimitiveEntry) entry).getAlias()); + } + if (it.hasNext()) + buf.append(';'); + } + properties.put("alias-list", buf.toString()); + if (containingEnvelope != null) + { + containingEnvelope.makeAliasList(); + } + } +} |
