package org.bouncycastle.asn1;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.math.BigInteger;
public class DERObjectIdentifier
extends DERObject
{
String identifier;
/**
* return an OID from the passed in object
*
* @exception IllegalArgumentException if the object cannot be converted.
*/
public static DERObjectIdentifier getInstance(
Object obj)
{
if (obj == null || obj instanceof DERObjectIdentifier)
{
return (DERObjectIdentifier)obj;
}
if (obj instanceof ASN1OctetString)
{
return new DERObjectIdentifier(((ASN1OctetString)obj).getOctets());
}
if (obj instanceof ASN1TaggedObject)
{
return getInstance(((ASN1TaggedObject)obj).getObject());
}
throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
}
/**
* return an Object Identifier from a tagged object.
*
* @param obj the tagged object holding the object we want
* @param explicit true if the object is meant to be explicitly
* tagged false otherwise.
* @exception IllegalArgumentException if the tagged object cannot
* be converted.
*/
public static DERObjectIdentifier getInstance(
ASN1TaggedObject obj,
boolean explicit)
{
return getInstance(obj.getObject());
}
DERObjectIdentifier(
byte[] bytes)
{
StringBuffer objId = new StringBuffer();
long value = 0;
BigInteger bigValue = null;
boolean first = true;
for (int i = 0; i != bytes.length; i++)
{
int b = bytes[i] & 0xff;
if (value < 0x80000000000000L)
{
value = value * 128 + (b & 0x7f);
if ((b & 0x80) == 0) // end of number reached
{
if (first)
{
switch ((int)value / 40)
{
case 0:
objId.append('0');
break;
case 1:
objId.append('1');
value -= 40;
break;
default:
objId.append('2');
value -= 80;
}
first = false;
}
objId.append('.');
objId.append(value);
value = 0;
}
}
else
{
if (bigValue == null)
{
bigValue = BigInteger.valueOf(value);
}
bigValue = bigValue.shiftLeft(7);
bigValue = bigValue.or(BigInteger.valueOf(b & 0x7f));
if ((b & 0x80) == 0)
{
objId.append('.');
objId.append(bigValue);
bigValue = null;
value = 0;
}
}
}
// BEGIN android-changed
/*
* Intern the identifier so there aren't hundreds of duplicates
* (in practice).
*/
this.identifier = objId.toString().intern();
// END android-changed
}
public DERObjectIdentifier(
String identifier)
{
if (!isValidIdentifier(identifier))
{
throw new IllegalArgumentException("string " + identifier + " not an OID");
}
// BEGIN android-changed
/*
* Intern the identifier so there aren't hundreds of duplicates
* (in practice).
*/
this.identifier = identifier.intern();
// END android-changed
}
public String getId()
{
return identifier;
}
private void writeField(
OutputStream out,
long fieldValue)
throws IOException
{
if (fieldValue >= (1L << 7))
{
if (fieldValue >= (1L << 14))
{
if (fieldValue >= (1L << 21))
{
if (fieldValue >= (1L << 28))
{
if (fieldValue >= (1L << 35))
{
if (fieldValue >= (1L << 42))
{
if (fieldValue >= (1L << 49))
{
if (fieldValue >= (1L << 56))
{
out.write((int)(fieldValue >> 56) | 0x80);
}
out.write((int)(fieldValue >> 49) | 0x80);
}
out.write((int)(fieldValue >> 42) | 0x80);
}
out.write((int)(fieldValue >> 35) | 0x80);
}
out.write((int)(fieldValue >> 28) | 0x80);
}
out.write((int)(fieldValue >> 21) | 0x80);
}
out.write((int)(fieldValue >> 14) | 0x80);
}
out.write((int)(fieldValue >> 7) | 0x80);
}
out.write((int)fieldValue & 0x7f);
}
private void writeField(
OutputStream out,
BigInteger fieldValue)
throws IOException
{
int byteCount = (fieldValue.bitLength()+6)/7;
if (byteCount == 0)
{
out.write(0);
}
else
{
BigInteger tmpValue = fieldValue;
byte[] tmp = new byte[byteCount];
for (int i = byteCount-1; i >= 0; i--)
{
tmp[i] = (byte) ((tmpValue.intValue() & 0x7f) | 0x80);
tmpValue = tmpValue.shiftRight(7);
}
tmp[byteCount-1] &= 0x7f;
out.write(tmp);
}
}
void encode(
DEROutputStream out)
throws IOException
{
OIDTokenizer tok = new OIDTokenizer(identifier);
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
DEROutputStream dOut = new DEROutputStream(bOut);
writeField(bOut,
Integer.parseInt(tok.nextToken()) * 40
+ Integer.parseInt(tok.nextToken()));
while (tok.hasMoreTokens())
{
String token = tok.nextToken();
if (token.length() < 18)
{
writeField(bOut, Long.parseLong(token));
}
else
{
writeField(bOut, new BigInteger(token));
}
}
dOut.close();
byte[] bytes = bOut.toByteArray();
out.writeEncoded(OBJECT_IDENTIFIER, bytes);
}
public int hashCode()
{
return identifier.hashCode();
}
public boolean equals(
Object o)
{
if ((o == null) || !(o instanceof DERObjectIdentifier))
{
return false;
}
return identifier.equals(((DERObjectIdentifier)o).identifier);
}
public String toString()
{
return getId();
}
private static boolean isValidIdentifier(
String identifier)
{
boolean periodAllowed = false;
for (int i = identifier.length() - 1; i >= 0; i--)
{
char ch = identifier.charAt(i);
if ('0' <= ch && ch <= '9')
{
periodAllowed = true;
continue;
}
if (ch == '.')
{
if (!periodAllowed)
{
return false;
}
periodAllowed = false;
continue;
}
return false;
}
return periodAllowed;
}
}