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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.8 and up.
package org.bouncycastle.asn1;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import org.bouncycastle.util.Arrays;
public class ASN1RelativeOID
extends ASN1Primitive
{
static final ASN1UniversalType TYPE = new ASN1UniversalType(ASN1RelativeOID.class, BERTags.RELATIVE_OID)
{
ASN1Primitive fromImplicitPrimitive(DEROctetString octetString)
{
return createPrimitive(octetString.getOctets(), false);
}
};
public static ASN1RelativeOID fromContents(byte[] contents)
{
return createPrimitive(contents, true);
}
public static ASN1RelativeOID getInstance(Object obj)
{
if (obj == null || obj instanceof ASN1RelativeOID)
{
return (ASN1RelativeOID)obj;
}
if (obj instanceof ASN1Encodable)
{
ASN1Primitive primitive = ((ASN1Encodable)obj).toASN1Primitive();
if (primitive instanceof ASN1RelativeOID)
{
return (ASN1RelativeOID)primitive;
}
}
else if (obj instanceof byte[])
{
byte[] enc = (byte[])obj;
try
{
return (ASN1RelativeOID)TYPE.fromByteArray(enc);
}
catch (IOException e)
{
throw new IllegalArgumentException("failed to construct relative OID from byte[]: " + e.getMessage());
}
}
throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
}
public static ASN1RelativeOID getInstance(ASN1TaggedObject taggedObject, boolean explicit)
{
return (ASN1RelativeOID)TYPE.getContextInstance(taggedObject, explicit);
}
private static final long LONG_LIMIT = (Long.MAX_VALUE >> 7) - 0x7F;
private final String identifier;
private byte[] contents;
public ASN1RelativeOID(String identifier)
{
if (identifier == null)
{
throw new NullPointerException("'identifier' cannot be null");
}
if (!isValidIdentifier(identifier, 0))
{
throw new IllegalArgumentException("string " + identifier + " not a relative OID");
}
this.identifier = identifier;
}
ASN1RelativeOID(ASN1RelativeOID oid, String branchID)
{
if (!isValidIdentifier(branchID, 0))
{
throw new IllegalArgumentException("string " + branchID + " not a valid OID branch");
}
this.identifier = oid.getId() + "." + branchID;
}
private ASN1RelativeOID(byte[] contents, boolean clone)
{
StringBuffer objId = new StringBuffer();
long value = 0;
BigInteger bigValue = null;
boolean first = true;
for (int i = 0; i != contents.length; i++)
{
int b = contents[i] & 0xff;
if (value <= LONG_LIMIT)
{
value += b & 0x7F;
if ((b & 0x80) == 0)
{
if (first)
{
first = false;
}
else
{
objId.append('.');
}
objId.append(value);
value = 0;
}
else
{
value <<= 7;
}
}
else
{
if (bigValue == null)
{
bigValue = BigInteger.valueOf(value);
}
bigValue = bigValue.or(BigInteger.valueOf(b & 0x7F));
if ((b & 0x80) == 0)
{
if (first)
{
first = false;
}
else
{
objId.append('.');
}
objId.append(bigValue);
bigValue = null;
value = 0;
}
else
{
bigValue = bigValue.shiftLeft(7);
}
}
}
this.identifier = objId.toString();
this.contents = clone ? Arrays.clone(contents) : contents;
}
public ASN1RelativeOID branch(String branchID)
{
return new ASN1RelativeOID(this, branchID);
}
public String getId()
{
return identifier;
}
public int hashCode()
{
return identifier.hashCode();
}
public String toString()
{
return getId();
}
boolean asn1Equals(ASN1Primitive other)
{
if (this == other)
{
return true;
}
if (!(other instanceof ASN1RelativeOID))
{
return false;
}
ASN1RelativeOID that = (ASN1RelativeOID)other;
return this.identifier.equals(that.identifier);
}
int encodedLength(boolean withTag)
{
return ASN1OutputStream.getLengthOfEncodingDL(withTag, getContents().length);
}
void encode(ASN1OutputStream out, boolean withTag) throws IOException
{
out.writeEncodingDL(withTag, BERTags.RELATIVE_OID, getContents());
}
boolean encodeConstructed()
{
return false;
}
private void doOutput(ByteArrayOutputStream aOut)
{
OIDTokenizer tok = new OIDTokenizer(identifier);
while (tok.hasMoreTokens())
{
String token = tok.nextToken();
if (token.length() <= 18)
{
writeField(aOut, Long.parseLong(token));
}
else
{
writeField(aOut, new BigInteger(token));
}
}
}
private synchronized byte[] getContents()
{
if (contents == null)
{
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
doOutput(bOut);
contents = bOut.toByteArray();
}
return contents;
}
static ASN1RelativeOID createPrimitive(byte[] contents, boolean clone)
{
return new ASN1RelativeOID(contents, clone);
}
static boolean isValidIdentifier(String identifier, int from)
{
int digitCount = 0;
int pos = identifier.length();
while (--pos >= from)
{
char ch = identifier.charAt(pos);
if (ch == '.')
{
if (0 == digitCount
|| (digitCount > 1 && identifier.charAt(pos + 1) == '0'))
{
return false;
}
digitCount = 0;
}
else if ('0' <= ch && ch <= '9')
{
++digitCount;
}
else
{
return false;
}
}
if (0 == digitCount
|| (digitCount > 1 && identifier.charAt(pos + 1) == '0'))
{
return false;
}
return true;
}
static void writeField(ByteArrayOutputStream out, long fieldValue)
{
byte[] result = new byte[9];
int pos = 8;
result[pos] = (byte)((int)fieldValue & 0x7F);
while (fieldValue >= (1L << 7))
{
fieldValue >>= 7;
result[--pos] = (byte)((int)fieldValue | 0x80);
}
out.write(result, pos, 9 - pos);
}
static void writeField(ByteArrayOutputStream out, 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() | 0x80);
tmpValue = tmpValue.shiftRight(7);
}
tmp[byteCount - 1] &= 0x7F;
out.write(tmp, 0, tmp.length);
}
}
}