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Diffstat (limited to 'src/main/model/csr/Attribute.java')
-rw-r--r-- | src/main/model/csr/Attribute.java | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/src/main/model/csr/Attribute.java b/src/main/model/csr/Attribute.java new file mode 100644 index 0000000..2fa319b --- /dev/null +++ b/src/main/model/csr/Attribute.java @@ -0,0 +1,83 @@ +package model.csr; + +import model.asn1.ASN1Object; +import model.asn1.ObjectIdentifier; +import model.asn1.Tag; +import model.asn1.exceptions.ParseException; +import model.asn1.parsing.BytesReader; + +import java.util.Arrays; +import java.util.Collection; +import java.util.stream.Stream; + +/** + * Implements the following: + * <pre> + * Attribute { ATTRIBUTE:IOSet } ::= SEQUENCE { + * type ATTRIBUTE.&id({IOSet}), + * values SET SIZE(1..MAX) OF ATTRIBUTE.&Type({IOSet}{@type}) + * } + * </pre> + * + * Represents a key - values pair in the CSR attribute. + */ +public class Attribute extends ASN1Object { + /** + * The type of that attribute. For example, <pre>2.5.29.14</pre> is subjectKeyIdentifier. + * It determines the format of the value. + */ + private final ObjectIdentifier type; + + /** + * Value set. + */ + private final Values values; + + /** + * EFFECT: Init the object with tag, parentTag, type, and values. For tag and parentTag, see {@link ASN1Object}. + * REQUIRES: The values must match the type. Type tag should be UNIVERSAL OID, and values should be SET OF. + */ + public Attribute(Tag tag, Tag parentTag, + ObjectIdentifier type, Values values) { + super(tag, parentTag); + this.type = type; + this.values = values; + } + + /** + * EFFECTS: Parse input DER. Value is not checked against the type. + * Throws {@link ASN1Object} if invalid: + * - Any fields missing (info, algorithm, signature) + * - Any fields having an incorrect tag (as seen in the ASN.1 definition) + * - Any fields with encoding instructions that violate implicit / explicit encoding rules + * - Other issues found during parsing the object, like early EOF (see {@link ASN1Object}) + * MODIFIES: this, encoded + */ + public Attribute(BytesReader encoded, boolean hasParentTag) throws ParseException { + super(encoded, hasParentTag); + this.type = new ObjectIdentifier(encoded, false); + this.type.getTag().enforce(ObjectIdentifier.TAG); + + this.values = new Values(encoded, false); + this.values.getTag().enforce(TAG_SET); + } + + /** + * EFFECTS: Encode the fields into DER, in the order. + */ + @Override + public Byte[] encodeValueDER() { + return Stream.of(Arrays.asList(type.encodeDER()), + Arrays.asList(values.encodeDER())) + .flatMap(Collection::stream) + .toArray(Byte[]::new); + } + + public ObjectIdentifier getType() { + return type; + } + + public Values getValues() { + return values; + } +} |