| package org.bouncycastle.asn1; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.Enumeration; |
| import java.util.Vector; |
| import org.bouncycastle.util.encoders.Hex; |
| |
| public abstract class ASN1OctetString |
| extends DERObject |
| { |
| byte[] string; |
| |
| /** |
| * return an Octet String 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 ASN1OctetString getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| return getInstance(obj.getObject()); |
| } |
| |
| /** |
| * return an Octet String from the given object. |
| * |
| * @param obj the object we want converted. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| */ |
| public static ASN1OctetString getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof ASN1OctetString) |
| { |
| return (ASN1OctetString)obj; |
| } |
| |
| if (obj instanceof ASN1TaggedObject) |
| { |
| return getInstance(((ASN1TaggedObject)obj).getObject()); |
| } |
| |
| if (obj instanceof ASN1Sequence) |
| { |
| Vector v = new Vector(); |
| Enumeration e = ((ASN1Sequence)obj).getObjects(); |
| |
| while (e.hasMoreElements()) |
| { |
| v.addElement(e.nextElement()); |
| } |
| |
| return new BERConstructedOctetString(v); |
| } |
| |
| throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); |
| } |
| |
| /** |
| * @param string the octets making up the octet string. |
| */ |
| public ASN1OctetString( |
| byte[] string) |
| { |
| this.string = string; |
| } |
| |
| public ASN1OctetString( |
| DEREncodable obj) |
| { |
| try |
| { |
| ByteArrayOutputStream bOut = new ByteArrayOutputStream(); |
| DEROutputStream dOut = new DEROutputStream(bOut); |
| |
| dOut.writeObject(obj); |
| dOut.close(); |
| |
| this.string = bOut.toByteArray(); |
| } |
| catch (IOException e) |
| { |
| throw new IllegalArgumentException("Error processing object : " + e.toString()); |
| } |
| } |
| |
| public byte[] getOctets() |
| { |
| return string; |
| } |
| |
| public int hashCode() |
| { |
| byte[] b = this.getOctets(); |
| int value = 0; |
| |
| for (int i = 0; i != b.length; i++) |
| { |
| value ^= (b[i] & 0xff) << (i % 4); |
| } |
| |
| return value; |
| } |
| |
| public boolean equals( |
| Object o) |
| { |
| if (!(o instanceof DEROctetString)) |
| { |
| return false; |
| } |
| |
| DEROctetString other = (DEROctetString)o; |
| |
| byte[] b1 = other.getOctets(); |
| byte[] b2 = this.getOctets(); |
| |
| if (b1.length != b2.length) |
| { |
| return false; |
| } |
| |
| for (int i = 0; i != b1.length; i++) |
| { |
| if (b1[i] != b2[i]) |
| { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| abstract void encode(DEROutputStream out) |
| throws IOException; |
| |
| public String toString() |
| { |
| return "#"+new String(Hex.encode(string)); |
| } |
| } |