| package org.bouncycastle.asn1; |
| |
| import java.io.IOException; |
| |
| import org.bouncycastle.util.Arrays; |
| import org.bouncycastle.util.Strings; |
| |
| /** |
| * DER UTF8String object. |
| */ |
| public class DERUTF8String |
| extends ASN1Primitive |
| implements ASN1String |
| { |
| private byte[] string; |
| |
| /** |
| * return an UTF8 string from the passed in object. |
| * |
| * @exception IllegalArgumentException |
| * if the object cannot be converted. |
| */ |
| public static DERUTF8String getInstance(Object obj) |
| { |
| if (obj == null || obj instanceof DERUTF8String) |
| { |
| return (DERUTF8String)obj; |
| } |
| |
| if (obj instanceof byte[]) |
| { |
| try |
| { |
| return (DERUTF8String)fromByteArray((byte[])obj); |
| } |
| catch (Exception e) |
| { |
| throw new IllegalArgumentException("encoding error in getInstance: " + e.toString()); |
| } |
| } |
| |
| throw new IllegalArgumentException("illegal object in getInstance: " |
| + obj.getClass().getName()); |
| } |
| |
| /** |
| * return an UTF8 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 DERUTF8String getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| ASN1Primitive o = obj.getObject(); |
| |
| if (explicit || o instanceof DERUTF8String) |
| { |
| return getInstance(o); |
| } |
| else |
| { |
| return new DERUTF8String(ASN1OctetString.getInstance(o).getOctets()); |
| } |
| } |
| |
| /** |
| * basic constructor - byte encoded string. |
| */ |
| DERUTF8String(byte[] string) |
| { |
| this.string = string; |
| } |
| |
| /** |
| * basic constructor |
| */ |
| public DERUTF8String(String string) |
| { |
| this.string = Strings.toUTF8ByteArray(string); |
| } |
| |
| public String getString() |
| { |
| return Strings.fromUTF8ByteArray(string); |
| } |
| |
| public String toString() |
| { |
| return getString(); |
| } |
| |
| public int hashCode() |
| { |
| return Arrays.hashCode(string); |
| } |
| |
| boolean asn1Equals(ASN1Primitive o) |
| { |
| if (!(o instanceof DERUTF8String)) |
| { |
| return false; |
| } |
| |
| DERUTF8String s = (DERUTF8String)o; |
| |
| return Arrays.areEqual(string, s.string); |
| } |
| |
| boolean isConstructed() |
| { |
| return false; |
| } |
| |
| int encodedLength() |
| throws IOException |
| { |
| return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; |
| } |
| |
| void encode(ASN1OutputStream out) |
| throws IOException |
| { |
| out.writeEncoded(BERTags.UTF8_STRING, string); |
| } |
| } |