| package org.bouncycastle.asn1; |
| |
| import java.io.IOException; |
| |
| import org.bouncycastle.util.Arrays; |
| import org.bouncycastle.util.Strings; |
| |
| /** |
| * DER VisibleString object encoding ISO 646 (ASCII) character code points 32 to 126. |
| * <p> |
| * Explicit character set escape sequences are not allowed. |
| * </p> |
| */ |
| public class DERVisibleString |
| extends ASN1Primitive |
| implements ASN1String |
| { |
| private final byte[] string; |
| |
| /** |
| * Return a Visible String from the passed in object. |
| * |
| * @param obj a DERVisibleString or an object that can be converted into one. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| * @return a DERVisibleString instance, or null |
| */ |
| public static DERVisibleString getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof DERVisibleString) |
| { |
| return (DERVisibleString)obj; |
| } |
| |
| if (obj instanceof byte[]) |
| { |
| try |
| { |
| return (DERVisibleString)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 a Visible 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 DERVisibleString instance, or null |
| */ |
| public static DERVisibleString getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| ASN1Primitive o = obj.getObject(); |
| |
| if (explicit || o instanceof DERVisibleString) |
| { |
| return getInstance(o); |
| } |
| else |
| { |
| return new DERVisibleString(ASN1OctetString.getInstance(o).getOctets()); |
| } |
| } |
| |
| /* |
| * Basic constructor - byte encoded string. |
| */ |
| DERVisibleString( |
| byte[] string) |
| { |
| this.string = string; |
| } |
| |
| /** |
| * Basic constructor |
| * |
| * @param string the string to be carried in the VisibleString object, |
| */ |
| public DERVisibleString( |
| String string) |
| { |
| this.string = Strings.toByteArray(string); |
| } |
| |
| public String getString() |
| { |
| return Strings.fromByteArray(string); |
| } |
| |
| 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.VISIBLE_STRING, this.string); |
| } |
| |
| boolean asn1Equals( |
| ASN1Primitive o) |
| { |
| if (!(o instanceof DERVisibleString)) |
| { |
| return false; |
| } |
| |
| return Arrays.areEqual(string, ((DERVisibleString)o).string); |
| } |
| |
| public int hashCode() |
| { |
| return Arrays.hashCode(string); |
| } |
| } |