diff options
Diffstat (limited to 'src/main/model/asn1/PrintableString.java')
-rw-r--r-- | src/main/model/asn1/PrintableString.java | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/src/main/model/asn1/PrintableString.java b/src/main/model/asn1/PrintableString.java new file mode 100644 index 0000000..73e33a6 --- /dev/null +++ b/src/main/model/asn1/PrintableString.java @@ -0,0 +1,49 @@ +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]|['()+,-./:=?])*"); + } +} |