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A Java SSL component library
package org.apache.commons.ssl.asn1;
import java.io.IOException;
/** DER IA5String object - this is an ascii string. */
public class DERIA5String
extends ASN1Object
implements DERString {
String string;
/**
* return a IA5 string from the passed in object
*
* @throws IllegalArgumentException if the object cannot be converted.
*/
public static DERIA5String getInstance(
Object obj) {
if (obj == null || obj instanceof DERIA5String) {
return (DERIA5String) obj;
}
if (obj instanceof ASN1OctetString) {
return new DERIA5String(((ASN1OctetString) obj).getOctets());
}
if (obj instanceof ASN1TaggedObject) {
return getInstance(((ASN1TaggedObject) obj).getObject());
}
throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
}
/**
* return an IA5 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.
* @throws IllegalArgumentException if the tagged object cannot
* be converted.
*/
public static DERIA5String getInstance(
ASN1TaggedObject obj,
boolean explicit) {
return getInstance(obj.getObject());
}
/** basic constructor - with bytes. */
public DERIA5String(
byte[] string) {
char[] cs = new char[string.length];
for (int i = 0; i != cs.length; i++) {
cs[i] = (char) (string[i] & 0xff);
}
this.string = new String(cs);
}
/** basic constructor - without validation. */
public DERIA5String(
String string) {
this(string, false);
}
/**
* Constructor with optional validation.
*
* @param string the base string to wrap.
* @param validate whether or not to check the string.
* @throws IllegalArgumentException if validate is true and the string
* contains characters that should not be in an IA5String.
*/
public DERIA5String(
String string,
boolean validate) {
if (validate && !isIA5String(string)) {
throw new IllegalArgumentException("string contains illegal characters");
}
this.string = string;
}
public String getString() {
return string;
}
public String toString() {
return string;
}
public byte[] getOctets() {
char[] cs = string.toCharArray();
byte[] bs = new byte[cs.length];
for (int i = 0; i != cs.length; i++) {
bs[i] = (byte) cs[i];
}
return bs;
}
void encode(
DEROutputStream out)
throws IOException {
out.writeEncoded(IA5_STRING, this.getOctets());
}
public int hashCode() {
return this.getString().hashCode();
}
boolean asn1Equals(
DERObject o) {
if (!(o instanceof DERIA5String)) {
return false;
}
DERIA5String s = (DERIA5String) o;
return this.getString().equals(s.getString());
}
/**
* return true if the passed in String can be represented without
* loss as an IA5String, false otherwise.
*
* @return true if in printable set, false otherwise.
*/
public static boolean isIA5String(
String str) {
for (int i = str.length() - 1; i >= 0; i--) {
char ch = str.charAt(i);
if (ch > 0x007f) {
return false;
}
}
return true;
}
}