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Asn1ObjectIdentifier.javaAPI DocBouncy Castle Crypto API 1.41 (Java 1.5)7149Wed Oct 01 10:55:30 BST 2008org.bouncycastle.sasn1

Asn1ObjectIdentifier

public class Asn1ObjectIdentifier extends DerObject
deprecated
use corresponsding classes in org.bouncycastle.asn1.

Fields Summary
private String
_oid
Constructors Summary
Asn1ObjectIdentifier(int baseTag, byte[] data)

        super(baseTag, BerTag.OBJECT_IDENTIFIER, data);

        StringBuffer    objId = new StringBuffer();
        long            value = 0;
        boolean         first = true;
        int             b = 0;
        BigInteger           bigValue = null;
        ByteArrayInputStream bIn = new ByteArrayInputStream(data);
        
        while ((b = bIn.read()) >= 0)
        {
            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;
                }
            }
        }

        this._oid = objId.toString();
public Asn1ObjectIdentifier(String oid)

        super(BerTagClass.UNIVERSAL, BerTag.OBJECT_IDENTIFIER, toByteArray(oid));
        
        this._oid = oid;
Methods Summary
public booleanequals(java.lang.Object o)

        if (!(o instanceof Asn1ObjectIdentifier))
        {
            return false;
        }

        return _oid.equals(((Asn1ObjectIdentifier)o)._oid);
public inthashCode()

        return _oid.hashCode();
private static byte[]toByteArray(java.lang.String oid)

        OIDTokenizer            tok = new OIDTokenizer(oid);
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();

        try
        {
            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));
                }
            }
        }
        catch (NumberFormatException e)
        {
            throw new IllegalArgumentException("exception parsing field value: " + e.getMessage());
        }
        catch (IOException e)
        {
            throw new IllegalArgumentException("exception converting to bytes: " + e.getMessage());
        }

        return bOut.toByteArray();
public java.lang.StringtoString()

        return _oid;
private static voidwriteField(java.io.OutputStream out, long fieldValue)

        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 static voidwriteField(java.io.OutputStream out, java.math.BigInteger fieldValue)

        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);
        }