ObjectIdentifier type

class pyasn1.type.univ.ObjectIdentifier(value=NoValue(), tagSet=TagSet(), subtypeSpec=ConstraintsIntersection())

Create ObjectIdentifier type or object.

ObjectIdentifier objects are immutable and duck-type Python tuple objects (tuple of non-negative integers).

Parameters:
  • value (tuple, str or ObjectIdentifier object) – Python sequence of int or string literal or ObjectIdentifier object.
  • tagSet (TagSet) – Object representing non-default ASN.1 tag(s)
  • subtypeSpec (ConstraintsIntersection) – Object representing non-default ASN.1 subtype constraint(s)
Raises:

: :py:class:`pyasn1.error.PyAsn1Error` – On constraint violation or bad initializer.

Note

The ObjectIdentifier type models ASN.1 OBJECT IDENTIFIER as a sequence of integer numbers.

clone(value=NoValue(), tagSet=TagSet(), subtypeSpec=ConstraintsIntersection())

Create a copy of a ObjectIdentifier type or object.

Any parameters to the clone() method will replace corresponding properties of the ObjectIdentifier object.

Parameters:
  • value (tuple, str or ObjectIdentifier object) – Initialization value to pass to new ASN.1 object instead of inheriting one from the caller.
  • tagSet (TagSet) – Object representing ASN.1 tag(s) to use in new object instead of inheriting from the caller
  • subtypeSpec (ConstraintsIntersection) – Object representing ASN.1 subtype constraint(s) to use in new object instead of inheriting from the caller
Returns:

new instance of ObjectIdentifier type/value

subtype(value=NoValue(), implicitTag=Tag(), explicitTag=Tag(), subtypeSpec=ConstraintsIntersection())

Create a copy of a ObjectIdentifier type or object.

Any parameters to the subtype() method will be added to the corresponding properties of the ObjectIdentifier object.

Parameters:
  • value (tuple, str or ObjectIdentifier object) – Initialization value to pass to new ASN.1 object instead of inheriting one from the caller.
  • implicitTag (Tag) – Implicitly apply given ASN.1 tag object to caller’s TagSet, then use the result as new object’s ASN.1 tag(s).
  • explicitTag (Tag) – Explicitly apply given ASN.1 tag object to caller’s TagSet, then use the result as new object’s ASN.1 tag(s).
  • subtypeSpec (ConstraintsIntersection) – Add ASN.1 constraints object to one of the caller, then use the result as new object’s ASN.1 constraints.
Returns:

new instance of ObjectIdentifier type/value

tagSet = TagSet((), Tag(tagClass=0, tagFormat=0, tagId=6))

Set (on class, not on instance) or return a TagSet object representing ASN.1 tag(s) associated with ObjectIdentifier type.

subtypeSpec = ConstraintsIntersection()

Set (on class, not on instance) or return a ConstraintsIntersection object imposing constraints on ObjectIdentifier type initialization values.

isPrefixOf(other)

Indicate if this ObjectIdentifier object is a prefix of other ObjectIdentifier object.

Parameters:other (|ASN.1| object) – ObjectIdentifier object
Returns:boolTrue if this ObjectIdentifier object is a parent (e.g. prefix) of the other ObjectIdentifier object or False otherwise.
effectiveTagSet

For ObjectIdentifier type is equivalent to tagSet

isSameTypeWith(other, matchTags=True, matchConstraints=True)

Examine ObjectIdentifier type for equality with other ASN.1 type.

ASN.1 tags (tag) and constraints (constraint) are examined when carrying out ASN.1 types comparison.

No Python inheritance relationship between PyASN1 objects is considered.

Parameters:other (a pyasn1 type object) – Class instance representing ASN.1 type.
Returns:boolTrue if other is ObjectIdentifier type, False otherwise.
isSuperTypeOf(other, matchTags=True, matchConstraints=True)

Examine ObjectIdentifier type for subtype relationship with other ASN.1 type.

ASN.1 tags (tag) and constraints (constraint) are examined when carrying out ASN.1 types comparison.

No Python inheritance relationship between PyASN1 objects is considered.

Parameters:other (a pyasn1 type object) – Class instance representing ASN.1 type.
Returns:boolTrue if other is a subtype of ObjectIdentifier type, False otherwise.
isValue

Indicate if ObjectIdentifier object represents ASN.1 type or ASN.1 value.

In other words, if isValue is True, then the ASN.1 object is initialized.

Returns:boolTrue if object represents ASN.1 value and type, False if object represents just ASN.1 type.

Note

There is an important distinction between PyASN1 type and value objects. The PyASN1 type objects can only participate in ASN.1 type operations (subtyping, comparison etc) and serve as a blueprint for serialization codecs to resolve ambiguous types.

The PyASN1 value objects can additionally participate in most of built-in Python operations.

tagMap

Return a TagMap object mapping ASN.1 tags to ASN.1 objects within callee object.