| package org.bouncycastle.asn1; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| |
| import org.bouncycastle.util.Arrays; |
| |
| /** |
| * DER UniversalString object. |
| */ |
| public class DERUniversalString |
| extends ASN1Primitive |
| implements ASN1String |
| { |
| private static final char[] table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; |
| private final byte[] string; |
| |
| /** |
| * return a Universal String from the passed in object. |
| * |
| * @param obj a DERUniversalString or an object that can be converted into one. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| * @return a DERUniversalString instance, or null |
| */ |
| public static DERUniversalString getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof DERUniversalString) |
| { |
| return (DERUniversalString)obj; |
| } |
| |
| if (obj instanceof byte[]) |
| { |
| try |
| { |
| return (DERUniversalString)fromByteArray((byte[])obj); |
| } |
| catch (Exception e) |
| { |
| throw new IllegalArgumentException("encoding error getInstance: " + e.toString()); |
| } |
| } |
| |
| throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); |
| } |
| |
| /** |
| * return a Universal 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. |
| * @return a DERUniversalString instance, or null |
| */ |
| public static DERUniversalString getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| ASN1Primitive o = obj.getObject(); |
| |
| if (explicit || o instanceof DERUniversalString) |
| { |
| return getInstance(o); |
| } |
| else |
| { |
| return new DERUniversalString(((ASN1OctetString)o).getOctets()); |
| } |
| } |
| |
| /** |
| * basic constructor - byte encoded string. |
| * |
| * @param string the byte encoding of the string to be carried in the UniversalString object, |
| */ |
| public DERUniversalString( |
| byte[] string) |
| { |
| this.string = Arrays.clone(string); |
| } |
| |
| public String getString() |
| { |
| StringBuffer buf = new StringBuffer("#"); |
| ByteArrayOutputStream bOut = new ByteArrayOutputStream(); |
| ASN1OutputStream aOut = new ASN1OutputStream(bOut); |
| |
| try |
| { |
| aOut.writeObject(this); |
| } |
| catch (IOException e) |
| { |
| throw new ASN1ParsingException("internal error encoding BitString"); |
| } |
| |
| byte[] string = bOut.toByteArray(); |
| |
| for (int i = 0; i != string.length; i++) |
| { |
| buf.append(table[(string[i] >>> 4) & 0xf]); |
| buf.append(table[string[i] & 0xf]); |
| } |
| |
| return buf.toString(); |
| } |
| |
| public String toString() |
| { |
| return getString(); |
| } |
| |
| public byte[] getOctets() |
| { |
| return Arrays.clone(string); |
| } |
| |
| boolean isConstructed() |
| { |
| return false; |
| } |
| |
| int encodedLength() |
| { |
| return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; |
| } |
| |
| void encode( |
| ASN1OutputStream out) |
| throws IOException |
| { |
| out.writeEncoded(BERTags.UNIVERSAL_STRING, this.getOctets()); |
| } |
| |
| boolean asn1Equals( |
| ASN1Primitive o) |
| { |
| if (!(o instanceof DERUniversalString)) |
| { |
| return false; |
| } |
| |
| return Arrays.areEqual(string, ((DERUniversalString)o).string); |
| } |
| |
| public int hashCode() |
| { |
| return Arrays.hashCode(string); |
| } |
| } |