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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/security/OID.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/security/OID.java | 512 |
1 files changed, 512 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/security/OID.java b/gcc-4.4.3/libjava/classpath/gnu/java/security/OID.java new file mode 100644 index 000000000..a3d70e220 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/security/OID.java @@ -0,0 +1,512 @@ +/* OID.java -- numeric representation of an object identifier + Copyright (C) 2003, 2004, 2005, 2006 Free Software Foundation, Inc. + +This file is 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, 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; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, 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.java.security; + +import gnu.java.lang.CPStringBuilder; + +import gnu.java.security.der.DEREncodingException; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.io.InputStream; +import java.util.StringTokenizer; + +/** + * This immutable class represents an object identifier, or OID. + * + * <p>OIDs are represented as a series of hierarchical tokens, each of + * which is usually represented as a single, unsigned integer. The + * hierarchy works so that later tokens are considered within the group + * of earlier tokens. Thus, the OID for the Serpent block cipher, + * 1.3.6.1.4.1.11591.13.2, is maintained by the GNU project, whose OID + * is 1.3.6.1.4.1.11591 (which is, in turn, part of bigger, more general + * bodies; the topmost, 1, stands for the OIDs assigned by the + * International Standards Organization, ISO). + * + * <p>OIDs can be represented in a variety of ways, including the + * dotted-decimal form we use here. + * + * <p>OIDs may be relative, in which case the first two elements of the + * OID are omitted. + * + * @author Casey Marshall (csm@gnu.org) + */ +public class OID implements Cloneable, Comparable, java.io.Serializable +{ + + // Fields. + // ------------------------------------------------------------------------ + + /* Serial version id for serialization. */ + static final long serialVersionUID = 5722492029044597779L; + + /** + * The numeric ID structure. + */ + private int[] components; + + /** + * The string representation of this OID, in dotted-decimal format. + */ + private transient String strRep; + + /** + * The DER encoding of this OID. + */ + private transient byte[] der; + + /** + * Whether or not this OID is relative. + */ + private boolean relative; + + // Constructors. + // ------------------------------------------------------------------------ + + /** + * Create a new OID from the given byte array. The argument (which can + * neither be null nor zero-length) is copied to prevent subsequent + * modification. + * + * @param components The numeric IDs. + * @throws IllegalArgumentException If <i>components</i> is null or empty. + */ + public OID(int[] components) + { + this(components, false); + } + + /** + * Create a new OID from the given byte array. The argument (which can + * neither be null nor zero-length) is copied to prevent subsequent + * modification. + * + * @param components The numeric IDs. + * @param relative The relative flag. + * @throws IllegalArgumentException If <i>components</i> is null or empty. + */ + public OID(int[] components, boolean relative) + { + if (components == null || components.length == 0) + throw new IllegalArgumentException(); + this.components = (int[]) components.clone(); + this.relative = relative; + } + + /** + * Create a new OID from the given dotted-decimal representation. + * + * @param strRep The string representation of the OID. + * @throws IllegalArgumentException If the string does not contain at + * least one integer. + * @throws NumberFormatException If the string does not contain only + * numbers and periods ('.'). + */ + public OID(String strRep) + { + this(strRep, false); + } + + /** + * Create a new OID from the given dotted-decimal representation. + * + * @param strRep The string representation of the OID. + * @param relative The relative flag. + * @throws IllegalArgumentException If the string does not contain at + * least one integer. + * @throws NumberFormatException If the string does not contain only + * numbers and periods ('.'). + */ + public OID(String strRep, boolean relative) + { + this.relative = relative; + this.strRep = strRep; + components = fromString(strRep); + } + + /** + * Construct a new OID from the DER bytes in an input stream. This method + * does not read the tag or the length field from the input stream, so + * the caller must supply the number of octets in this OID's encoded + * form. + * + * @param derIn The DER input stream. + * @param len The number of bytes in the encoded form. + * @throws IOException If an error occurs reading the OID. + */ + public OID(InputStream derIn, int len) throws IOException + { + this(derIn, len, false); + } + + /** + * Construct a new OID from the DER bytes in an input stream. This method + * does not read the tag or the length field from the input stream, so + * the caller must supply the number of octets in this OID's encoded + * form. + * + * @param derIn The DER input stream. + * @param len The number of bytes in the encoded form. + * @param relative The relative flag. + * @throws IOException If an error occurs reading the OID. + */ + public OID(InputStream derIn, int len, boolean relative) throws IOException + { + der = new byte[len]; + derIn.read(der); + this.relative = relative; + try + { + components = fromDER(der, relative); + } + catch (ArrayIndexOutOfBoundsException aioobe) + { + aioobe.printStackTrace(); + throw aioobe; + } + } + + /** + * Construct a new OID from the given DER bytes. + * + * @param encoded The DER encoded OID. + * @throws IOException If an error occurs reading the OID. + */ + public OID(byte[] encoded) throws IOException + { + this(encoded, false); + } + + /** + * Construct a new OID from the given DER bytes. + * + * @param encoded The encoded relative OID. + * @param relative The relative flag. + */ + public OID(byte[] encoded, boolean relative) throws IOException + { + der = (byte[]) encoded.clone(); + this.relative = relative; + try + { + components = fromDER(der, relative); + } + catch (ArrayIndexOutOfBoundsException aioobe) + { + aioobe.printStackTrace(); + throw aioobe; + } + } + + // Instance methods. + // ------------------------------------------------------------------------ + + /** + * Return the numeric IDs of this OID. The value returned is copied to + * prevent modification. + * + * @return The IDs in a new integer array. + */ + public int[] getIDs() + { + return (int[]) components.clone(); + } + + /** + * Get the DER encoding of this OID, minus the tag and length fields. + * + * @return The DER bytes. + */ + public byte[] getDER() + { + if (der == null) + { + ByteArrayOutputStream bout = new ByteArrayOutputStream(); + int i = 0; + if (!relative) + { + int b = components[i++] * 40 + (components.length > 1 + ? components[i++] : 0); + encodeSubID(bout, b); + } + for ( ; i < components.length; i++) + encodeSubID(bout, components[i]); + der = bout.toByteArray(); + } + return (byte[]) der.clone(); + } + + /** + * Get the parent OID of this OID. That is, if this OID is "1.2.3.4", + * then the parent OID will be "1.2.3". If this OID is a top-level + * OID, this method returns null. + * + * @return The parent OID, or null. + */ + public OID getParent() + { + if (components.length == 1) + return null; + int[] parent = new int[components.length - 1]; + System.arraycopy(components, 0, parent, 0, parent.length); + return new OID(parent); + } + + public OID getChild(int id) + { + int[] child = new int[components.length + 1]; + System.arraycopy(components, 0, child, 0, components.length); + child[child.length - 1] = id; + return new OID(child); + } + + /** + * Get the root OID of this OID. That is, the first two components. + * + * @return The root OID. + */ + public OID getRoot() + { + if (components.length <= 2) + return this; + int[] root = new int[2]; + root[0] = components[0]; + root[1] = components[1]; + return new OID(root); + } + + public boolean isRelative() + { + return relative; + } + + /** + * Returns a copy of this OID. + * + * @return The copy. + */ + public Object clone() + { + try + { + return super.clone(); + } + catch (CloneNotSupportedException cnse) + { + InternalError ie = new InternalError(); + ie.initCause(cnse); + throw ie; + } + } + + /* Nice idea, but possibly too expensive for whatever benefit it + * provides. + + public String getShortName() + { + return OIDTable.getShortName(this); + } + + public String getLongName() + { + return OIDTable.getLongName(this); + } + + */ + + /** + * Returns the value of this OID in dotted-decimal format. + * + * @return The string representation. + */ + public String toString() + { + if (strRep != null) + return strRep; + else + { + CPStringBuilder buf = new CPStringBuilder(); + for (int i = 0; i < components.length; i++) + { + buf.append((long) components[i] & 0xFFFFFFFFL); + if (i < components.length - 1) + buf.append('.'); + } + return (strRep = buf.toString()); + } + } + + /** + * Computes a hash code for this OID. + * + * @return The hash code. + */ + public int hashCode() + { + int ret = 0; + for (int i = 0; i < components.length; i++) + ret += components[i] << (i & 31); + return ret; + } + + /** + * Tests whether or not this OID equals another. + * + * @return Whether or not this OID equals the other. + */ + public boolean equals(Object o) + { + if (!(o instanceof OID)) + return false; + return java.util.Arrays.equals(components, ((OID) o).components); + } + + /** + * Compares this OID to another. The comparison is essentially + * lexicographic, where the two OIDs are compared until their + * first difference, then that difference is returned. If one OID is + * shorter, but all elements equal between the two for the shorter + * length, then the shorter OID is lesser than the longer. + * + * @param o The object to compare. + * @return An integer less than, equal to, or greater than zero if + * this object is less than, equal to, or greater than the + * argument. + * @throws ClassCastException If <i>o</i> is not an OID. + */ + public int compareTo(Object o) + { + if (equals(o)) + return 0; + int[] components2 = ((OID) o).components; + int len = Math.min(components.length, components2.length); + for (int i = 0; i < len; i++) + { + if (components[i] != components2[i]) + return (components[i] < components2[i]) ? -1 : 1; + } + if (components.length == components2.length) + return 0; + return (components.length < components2.length) ? -1 : 1; + } + + // Own methods. + // ------------------------------------------------------------------------ + + private static int[] fromDER(byte[] der, boolean relative) + throws DEREncodingException + { + // cannot be longer than this. + int[] components = new int[der.length + 1]; + int count = 0; + int i = 0; + if (!relative && i < der.length) + { + // Non-relative OIDs have the first two arcs coded as: + // + // i = first_arc * 40 + second_arc; + // + int j = (der[i] & 0xFF); + components[count++] = j / 40; + components[count++] = j % 40; + i++; + } + while (i < der.length) + { + int j = 0; + do + { + j = der[i++] & 0xFF; + components[count] <<= 7; + components[count] |= j & 0x7F; + if (i >= der.length && (j & 0x80) != 0) + throw new DEREncodingException("malformed OID"); + } + while ((j & 0x80) != 0); + count++; + } + if (count == components.length) + return components; + int[] ret = new int[count]; + System.arraycopy(components, 0, ret, 0, count); + return ret; + } + + private static int[] fromString(String strRep) throws NumberFormatException + { + if (strRep.startsWith("OID.") || strRep.startsWith("oid.")) + strRep = strRep.substring(4); + StringTokenizer tok = new StringTokenizer(strRep, "."); + if (tok.countTokens() == 0) + throw new IllegalArgumentException(); + int[] components = new int[tok.countTokens()]; + int i = 0; + while (tok.hasMoreTokens()) + { + components[i++] = Integer.parseInt(tok.nextToken()); + } + return components; + } + + private static void encodeSubID(ByteArrayOutputStream out, int id) + { + if (id < 128) + { + out.write(id); + } + else if (id < 16384) + { + out.write((id >>> 7) | 0x80); + out.write(id & 0x7F); + } + else if (id < 2097152) + { + out.write((id >>> 14) | 0x80); + out.write(((id >>> 7) | 0x80) & 0xFF); + out.write(id & 0x7F); + } + else if (id < 268435456) + { + out.write( (id >>> 21) | 0x80); + out.write(((id >>> 14) | 0x80) & 0xFF); + out.write(((id >>> 7) | 0x80) & 0xFF); + out.write(id & 0x7F); + } + } +} |