Package io.anyline.nfc.bouncycastle.asn1

Class ASN1Sequence

  • All Implemented Interfaces:
    io.anyline.nfc.bouncycastle.asn1.ASN1Encodable , io.anyline.nfc.bouncycastle.util.Encodable , io.anyline.nfc.bouncycastle.util.Iterable , java.lang.Iterable 
    
public abstract class ASN1Sequence
extends ASN1Primitive implements Iterable<T>

    ASN.1 SEQUENCE and SEQUENCE OF constructs.

    DER form is always definite form length fields, while BER support uses indefinite form.

    X.690

    8: Basic encoding rules

    8.9 Encoding of a sequence value

    8.9.1 The encoding of a sequence value shall be constructed.

    8.9.2 The contents octets shall consist of the complete encoding of one data value from each of the types listed in the ASN.1 definition of the sequence type, in the order of their appearance in the definition, unless the type was referenced with the keyword OPTIONAL or the keyword DEFAULT.

    8.9.3 The encoding of a data value may, but need not, be present for a type which was referenced with the keyword OPTIONAL or the keyword DEFAULT. If present, it shall appear in the encoding at the point corresponding to the appearance of the type in the ASN.1 definition.

    8.10 Encoding of a sequence-of value

    8.10.1 The encoding of a sequence-of value shall be constructed.

    8.10.2 The contents octets shall consist of zero, one or more complete encodings of data values from the type listed in the ASN.1 definition.

    8.10.3 The order of the encodings of the data values shall be the same as the order of the data values in the sequence-of value to be encoded.

    9: Canonical encoding rules

    9.1 Length forms

    If the encoding is constructed, it shall employ the indefinite-length form. If the encoding is primitive, it shall include the fewest length octets necessary. [Contrast with 8.1.3.2 b).]

    11: Restrictions on BER employed by both CER and DER

    11.5 Set and sequence components with default value

    The encoding of a set value or sequence value shall not include an encoding for any component value which is equal to its default value.

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      static ASN1Sequence getInstance(Object obj) Return an ASN1Sequence from the given object.
      static ASN1Sequence getInstance(ASN1TaggedObject taggedObject, boolean explicit) Return an ASN1 SEQUENCE from a tagged object.
      Array<ASN1Encodable> toArray()
      Enumeration getObjects()
      ASN1SequenceParser parser()
      ASN1Encodable getObjectAt(int index) Return the object at the sequence position indicated by index.
      int size() Return the number of objects in this sequence.
      int hashCode()
      String toString()
      Iterator<ASN1Encodable> iterator() Returns an iterator over a set of elements of type T.

      • Methods inherited from class io.anyline.nfc.bouncycastle.asn1.ASN1Primitive

        encodeTo, encodeTo, equals, equals, equals, fromByteArray, toASN1Primitive

      • Methods inherited from class io.anyline.nfc.bouncycastle.asn1.ASN1Object

        equals, getEncoded, getEncoded

      • Methods inherited from class java.lang.Iterable

        forEach, iterator, spliterator

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

    • Method Detail

      • getInstance

         static ASN1Sequence getInstance(Object obj)

        Return an ASN1Sequence from the given object.

        Parameters:
        obj - the object we want converted.
        Returns:

        an ASN1Sequence instance, or null.

      • getInstance

         static ASN1Sequence getInstance(ASN1TaggedObject taggedObject, boolean explicit)

        Return an ASN1 SEQUENCE from a tagged object. There is a special case here, if an object appears to have been explicitly tagged on reading but we were expecting it to be implicitly tagged in the normal course of events it indicates that we lost the surrounding sequence - so we need to add it back (this will happen if the tagged object is a sequence that contains other sequences). If you are dealing with implicitly tagged sequences you really should be using this method.

        Parameters:
        taggedObject - the tagged object.
        explicit - true if the object is meant to be explicitly tagged, false otherwise.
        Returns:

        an ASN1Sequence instance.

      • getObjectAt

         ASN1Encodable getObjectAt(int index)

        Return the object at the sequence position indicated by index.

        Parameters:
        index - the sequence number (starting at zero) of the object
        Returns:

        the object at the sequence position indicated by index.

      • size

         int size()

        Return the number of objects in this sequence.

        Returns:

        the number of objects in this sequence.