Class ASN1Sequence
- All Implemented Interfaces:
Iterable<ASN1Encodable>,ASN1Encodable,Encodable,Iterable<ASN1Encodable>
- Direct Known Subclasses:
BERSequence,DERSequence,DLSequence
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.
-
Constructor Summary
ConstructorsModifierConstructorDescriptionprotectedCreate an empty SEQUENCEprotectedASN1Sequence(ASN1Encodable element) Create a SEQUENCE containing one object.protectedASN1Sequence(ASN1Encodable[] elements) Create a SEQUENCE containing an array of objects.protectedASN1Sequence(ASN1EncodableVector elementVector) Create a SEQUENCE containing a vector of objects. -
Method Summary
Modifier and TypeMethodDescriptionstatic ASN1SequencegetInstance(Object obj) Return an ASN1Sequence from the given object.static ASN1SequencegetInstance(ASN1TaggedObject taggedObject, boolean explicit) Return an ASN1 SEQUENCE from a tagged object.getObjectAt(int index) Return the object at the sequence position indicated by index.inthashCode()iterator()Returns an iterator over a set of elements of type T.parser()intsize()Return the number of objects in this sequence.toArray()toString()Methods inherited from class org.bouncycastle.asn1.ASN1Primitive
encodeTo, encodeTo, equals, equals, equals, fromByteArray, toASN1PrimitiveMethods inherited from class org.bouncycastle.asn1.ASN1Object
getEncoded, getEncoded, hasEncodedTagValueMethods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface java.lang.Iterable
forEach, spliterator
-
Constructor Details
-
ASN1Sequence
protected ASN1Sequence()Create an empty SEQUENCE -
ASN1Sequence
Create a SEQUENCE containing one object.- Parameters:
element- the object to be put in the SEQUENCE.
-
ASN1Sequence
Create a SEQUENCE containing a vector of objects.- Parameters:
elementVector- the vector of objects to be put in the SEQUENCE.
-
ASN1Sequence
Create a SEQUENCE containing an array of objects.- Parameters:
elements- the array of objects to be put in the SEQUENCE.
-
-
Method Details
-
getInstance
Return an ASN1Sequence from the given object.- Parameters:
obj- the object we want converted.- Returns:
- an ASN1Sequence instance, or null.
- Throws:
IllegalArgumentException- if the object cannot be converted.
-
getInstance
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.
- Throws:
IllegalArgumentException- if the tagged object cannot be converted.
-
toArray
-
getObjects
-
parser
-
getObjectAt
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
public int size()Return the number of objects in this sequence.- Returns:
- the number of objects in this sequence.
-
hashCode
public int hashCode()- Specified by:
hashCodein classASN1Primitive
-
toString
-
iterator
Description copied from interface:IterableReturns an iterator over a set of elements of type T.- Specified by:
iteratorin interfaceIterable<ASN1Encodable>- Specified by:
iteratorin interfaceIterable<ASN1Encodable>- Returns:
- an Iterator.
-