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Class: OpenSSL::ASN1::Primitive

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
ObjectId
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ASN1Data
Instance Chain:
self, ASN1Data
Inherits: OpenSSL::ASN1::ASN1Data
Defined in: ext/openssl/ossl_asn1.c

Overview

The parent class for all primitive encodings. Attributes are the same as for ASN1Data, with the addition of #tagging. Primitive values can never be infinite length encodings, thus it is not possible to set the infinite_length attribute for Primitive and its sub-classes.

Primitive sub-classes and their mapping to Ruby classes

  • OpenSSL::ASN1::EndOfContent <=> value is always nil

  • OpenSSL::ASN1::Boolean <=> value is a Boolean

  • OpenSSL::ASN1::Integer <=> value is an ::OpenSSL::BN

  • OpenSSL::ASN1::BitString <=> value is a String

  • OpenSSL::ASN1::OctetString <=> value is a String

  • OpenSSL::ASN1::Null <=> value is always nil

  • OpenSSL::ASN1::Object <=> value is a String

  • OpenSSL::ASN1::Enumerated <=> value is an ::OpenSSL::BN

  • OpenSSL::ASN1::UTF8String <=> value is a String

  • OpenSSL::ASN1::NumericString <=> value is a String

  • OpenSSL::ASN1::PrintableString <=> value is a String

  • OpenSSL::ASN1::T61String <=> value is a String

  • OpenSSL::ASN1::VideotexString <=> value is a String

  • OpenSSL::ASN1::IA5String <=> value is a String

  • OpenSSL::ASN1::UTCTime <=> value is a Time

  • OpenSSL::ASN1::GeneralizedTime <=> value is a Time

  • OpenSSL::ASN1::GraphicString <=> value is a String

  • OpenSSL::ASN1::ISO64String <=> value is a String

  • OpenSSL::ASN1::GeneralString <=> value is a String

  • OpenSSL::ASN1::UniversalString <=> value is a String

  • OpenSSL::ASN1::BMPString <=> value is a String

OpenSSL::ASN1::BitString

Additional attributes

unused_bits: if the underlying BIT STRING's length is a multiple of 8 then unused_bits is 0. Otherwise unused_bits indicates the number of bits that are to be ignored in the final octet of the BitString's value.

ObjectId

NOTE: While OpenSSL::ASN1::ObjectId.new will allocate a new ObjectId, it is not typically allocated this way, but rather that are received from parsed ::OpenSSL::ASN1 encodings.

Additional attributes

  • sn: the short name as defined in <openssl/objects.h>.

  • ln: the long name as defined in <openssl/objects.h>.

  • oid: the object identifier as a String, e.g. “1.2.3.4.5”

  • short_name: alias for sn.

  • long_name: alias for ln.

Examples

With the Exception of OpenSSL::ASN1::EndOfContent, each Primitive class constructor takes at least one parameter, the value.

Creating EndOfContent

eoc = OpenSSL::ASN1::EndOfContent.new

Creating any other Primitive

prim = <class>.new(value) # <class> being one of the sub-classes except EndOfContent
prim_zero_tagged_implicit = <class>.new(value, 0, :IMPLICIT)
prim_zero_tagged_explicit = <class>.new(value, 0, :EXPLICIT)

Class Method Summary

ASN1Data - Inherited

.new

value: Please have a look at Constructive and Primitive to see how Ruby types are mapped to ASN.1 types and vice versa.

Instance Attribute Summary

  • #tagging rw

    May be used as a hint for encoding a value either implicitly or explicitly by setting it either to :IMPLICIT or to :EXPLICIT.

ASN1Data - Inherited

#infinite_length

Never nil.
#tag

A Number representing the tag number of this ASN1Data.
#tag_class

A Symbol representing the tag class of this ASN1Data.
#value

Carries the value of a ASN.1 type.

Instance Method Summary

ASN1Data - Inherited

#to_der

Encodes this ASN1Data into a DER-encoded String value.

Constructor Details

.new(value [, tag, tagging, tag_class ]) ⇒ Primitive

value: is mandatory.

tag: optional, may be specified for tagged values. If no tag is specified, the UNIVERSAL tag corresponding to the Primitive sub-class is used by default.

#tagging: may be used as an encoding hint to encode a value either explicitly or implicitly, see ::OpenSSL::ASN1 for possible values.

tag_class: if tag and #tagging are nil then this is set to :UNIVERSAL by default. If either tag or #tagging are set then :CONTEXT_SPECIFIC is used as the default. For possible values please cf. ::OpenSSL::ASN1.

Example

int = OpenSSL::ASN1::Integer.new(42)
zero_tagged_int = OpenSSL::ASN1::Integer.new(42, 0, :IMPLICIT)
private_explicit_zero_tagged_int = OpenSSL::ASN1::Integer.new(42, 0, :EXPLICIT, :PRIVATE)

Instance Attribute Details

#tagging (rw)

May be used as a hint for encoding a value either implicitly or explicitly by setting it either to :IMPLICIT or to :EXPLICIT. tagging is not set when a ASN.1 structure is parsed using OpenSSL::ASN1.decode.

Instance Method Details

#to_der ⇒ DER-encoded String

See ASN1Data#to_der for details. *