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package model.asn1;
import model.asn1.exceptions.ParseException;
import model.asn1.parsing.BytesReader;
import ui.Utils;
import java.nio.charset.StandardCharsets;
/**
* An ASN.1 PrintableString that only allows ([a-z]|[A-Z]| |[0-9]|['()+,-./:=?])*.
*/
public class PrintableString extends ASN1String {
/**
* The X.680 universal class tag assignment.
*/
public static final Tag TAG = new Tag(TagClass.UNIVERSAL, false, 0x13);
/**
* EFFECTS: Constructs with the given string.
* Throws {@link ParseException} if the given string is illegal (contains chars out of the PrintableString set).
* REQUIRES: For the requirements of tag and parentTag, consult {@link ASN1Object}.
*/
public PrintableString(Tag tag, Tag parentTag, String rawString) throws ParseException {
super(tag, parentTag, rawString);
}
/**
* EFFECTS: Parse from user input. Tags are parsed as-per {@link ASN1Object}. The value will be parsed as UTF-8 big
* endian.
* Throws {@link ParseException} if the encoded data is invalid:
* - Early EOF and other cases in {@link ASN1Object}
* - Illegal string: Contains non-printable chars
* MODIFIES: this, encoded
*/
public PrintableString(BytesReader encoded, boolean hasParentTag) throws ParseException {
super(encoded, hasParentTag);
setString(new String(Utils.byteToByte(encoded.require(getLength(), true)),
StandardCharsets.UTF_8));
}
/**
* EFFECTS: Validate the given string against PrintableString spec.
* REQUIRES: newString != null
*/
@Override
protected boolean validate(String newString) {
return newString.matches("([a-z]|[A-Z]| |[0-9]|['()+,-./:=?])*");
}
}
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