X500Name crash

[lhuynh-cs]

import java.io.IOException;

import javax.security.auth.x500.X500Principal;

import org.bouncycastle.asn1.x500.X500Name;
import org.bouncycastle.asn1.x500.X500NameBuilder;
import org.bouncycastle.asn1.x500.style.BCStyle;

public class TestParseDN {
	public static void main(String[] arg) throws IOException {
		String cn = "=^_^=";
		String dn = "CN=" + cn;

		X500Principal principal = new X500Principal(dn);
		System.out.println("Using X500Principal: " + principal.getName());
		
		X500NameBuilder builder = new X500NameBuilder(BCStyle.INSTANCE);
		builder.addRDN(BCStyle.CN, cn);
		X500Name x500Name = builder.build();
		System.out.println("Using X500NameBuilder: " + x500Name.toString());
		
		X500Name x500 = new X500Name(dn);
		System.out.println("Using X500Name: " + x500.toString());
	}
}

The output is (BC 1.83):

Using X500Principal: CN=\=^_^\=
Using X500NameBuilder: CN=\=^_^\=
Exception in thread "main" java.lang.IllegalArgumentException: badly formatted directory string
	at org.bouncycastle.asn1.x500.style.IETFUtils.nextToken(IETFUtils.java:218)
	at org.bouncycastle.asn1.x500.style.IETFUtils.addRDN(IETFUtils.java:191)
	at org.bouncycastle.asn1.x500.style.IETFUtils.addRDNs(IETFUtils.java:154)
	at org.bouncycastle.asn1.x500.style.IETFUtils.rDNsFromString(IETFUtils.java:137)
	at org.bouncycastle.asn1.x500.style.BCStyle.fromString(BCStyle.java:349)
	at org.bouncycastle.asn1.x500.X500Name.<init>(X500Name.java:161)
	at org.bouncycastle.asn1.x500.X500Name.<init>(X500Name.java:154)
	at test.TestParseDN.main(TestParseDN.java:27)

With String cn = "\\=^_^\\="; X500NameBuilder parsing is incorrect:

Using X500Principal: CN=\=^_^\=
Using X500NameBuilder: CN=\=^_^\\\=
Using X500Name: CN=\=^_^\=