IA5String type

class pyasn1.type.char.IA5String(value=NoValue(), tagSet=TagSet(), subtypeSpec=ConstraintsIntersection(), encoding='us-ascii')

Creates IA5String type or object.

IA5String objects are immutable and duck-type Python 2 unicode or Python 3 str. When used in octet-stream context, IA5String type assumes “us-ascii” encoding.

Parameters:
  • value (unicode, str, bytes or IA5String object) – unicode object (Python 2) or string (Python 3), alternatively string (Python 2) or bytes (Python 3) representing octet-stream of serialized unicode string (note encoding parameter) or IA5String class instance.
  • tagSet (TagSet) – Object representing non-default ASN.1 tag(s)
  • subtypeSpec (ConstraintsIntersection) – Object representing non-default ASN.1 subtype constraint(s)
  • encoding (str) – Unicode codec ID to encode/decode unicode (Python 2) or str (Python 3) the payload when IA5String object is used in octet-stream context.
Raises:

pyasn1.error.PyAsn1Error – On constraint violation or bad initializer.

Note

The IA5String type models a basic character string first published in 1963 as an ISO/ITU standard, then it turned into ASCII.

clone(value=NoValue(), tagSet=TagSet(), subtypeSpec=ConstraintsIntersection(), encoding='us-ascii')

Creates a copy of a IA5String type or object.

Any parameters to the clone() method will replace corresponding properties of the IA5String object.

Parameters:
  • value (unicode, str, bytes or IA5String object) – unicode object (Python 2) or string (Python 3), alternatively string (Python 2) or bytes (Python 3) representing octet-stream of serialized unicode string (note encoding parameter) or IA5String class instance.
  • tagSet (TagSet) – Object representing non-default ASN.1 tag(s)
  • subtypeSpec (ConstraintsIntersection) – Object representing non-default ASN.1 subtype constraint(s)
  • encoding (str) – Unicode codec ID to encode/decode unicode (Python 2) or str (Python 3) the payload when IA5String object is used in octet-stream context.
Returns:

new instance of IA5String type/value

subtype(value=NoValue(), implicitTag=Tag(), explicitTag=Tag(), subtypeSpec=ConstraintsIntersection(), encoding='us-ascii')

Creates a copy of a IA5String type or object.

Any parameters to the subtype() method will be added to the corresponding properties of the IA5String object.

Parameters:
  • value (unicode, str, bytes or IA5String object) – unicode object (Python 2) or string (Python 3), alternatively string (Python 2) or bytes (Python 3) representing octet-stream of serialized unicode string (note encoding parameter) or IA5String class instance.
  • 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) – Object representing non-default ASN.1 subtype constraint(s)
  • encoding (str) – Unicode codec ID to encode/decode unicode (Python 2) or str (Python 3) the payload when IA5String object is used in octet-stream context.
Returns:

new instance of IA5String type/value

tagSet = TagSet((), Tag(tagClass=0, tagFormat=0, tagId=22))

Default TagSet object for IA5String objects

hasValue()

Indicate if IA5String object represents ASN.1 value or ASN.1 type.

The PyASN1 type objects can only participate in types comparison and serve as a blueprint for serialization codecs to resolve ambiguous types.

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

Returns:boolTrue if object is ASN.1 value, False otherwise.
isSameTypeWith(other, matchTags=True, matchConstraints=True)

Examine IA5String 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 IA5String type, False otherwise.
isSuperTypeOf(other, matchTags=True, matchConstraints=True)

Examine IA5String 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 IA5String type, False otherwise.