| package org.bouncycastle.asn1; |
| |
| import java.io.IOException; |
| |
| import org.bouncycastle.util.Arrays; |
| |
| /** |
| * Carrier class for DER encoding BMPString object. |
| */ |
| public class DERBMPString |
| extends ASN1Primitive |
| implements ASN1String |
| { |
| private final char[] string; |
| |
| /** |
| * return a BMP String from the given object. |
| * |
| * @param obj the object we want converted. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| * @return a DERBMPString instance, or null. |
| */ |
| public static DERBMPString getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof DERBMPString) |
| { |
| return (DERBMPString)obj; |
| } |
| |
| if (obj instanceof byte[]) |
| { |
| try |
| { |
| return (DERBMPString)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 BMP 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 DERBMPString instance. |
| */ |
| public static DERBMPString getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| ASN1Primitive o = obj.getObject(); |
| |
| if (explicit || o instanceof DERBMPString) |
| { |
| return getInstance(o); |
| } |
| else |
| { |
| return new DERBMPString(ASN1OctetString.getInstance(o).getOctets()); |
| } |
| } |
| |
| /** |
| * basic constructor - byte encoded string. |
| * @param string the encoded BMP STRING to wrap. |
| */ |
| DERBMPString( |
| byte[] string) |
| { |
| char[] cs = new char[string.length / 2]; |
| |
| for (int i = 0; i != cs.length; i++) |
| { |
| cs[i] = (char)((string[2 * i] << 8) | (string[2 * i + 1] & 0xff)); |
| } |
| |
| this.string = cs; |
| } |
| |
| DERBMPString(char[] string) |
| { |
| this.string = string; |
| } |
| |
| /** |
| * basic constructor |
| * @param string a String to wrap as a BMP STRING. |
| */ |
| public DERBMPString( |
| String string) |
| { |
| this.string = string.toCharArray(); |
| } |
| |
| public String getString() |
| { |
| return new String(string); |
| } |
| |
| public String toString() |
| { |
| return getString(); |
| } |
| |
| public int hashCode() |
| { |
| return Arrays.hashCode(string); |
| } |
| |
| protected boolean asn1Equals( |
| ASN1Primitive o) |
| { |
| if (!(o instanceof DERBMPString)) |
| { |
| return false; |
| } |
| |
| DERBMPString s = (DERBMPString)o; |
| |
| return Arrays.areEqual(string, s.string); |
| } |
| |
| boolean isConstructed() |
| { |
| return false; |
| } |
| |
| int encodedLength() |
| { |
| return 1 + StreamUtil.calculateBodyLength(string.length * 2) + (string.length * 2); |
| } |
| |
| void encode( |
| ASN1OutputStream out) |
| throws IOException |
| { |
| out.write(BERTags.BMP_STRING); |
| out.writeLength(string.length * 2); |
| |
| for (int i = 0; i != string.length; i++) |
| { |
| char c = string[i]; |
| |
| out.write((byte)(c >> 8)); |
| out.write((byte)c); |
| } |
| } |
| } |