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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 encoded with indefinite length form, thus it is not possible to set the indefinite_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 true or false

  • 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 Method Summary

ASN1Data - Inherited

#infinite_length

Alias for indefinite_length.
#infinite_length=

Alias for indefinite_length=.
#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)
[ GitHub ] 

  


# File 'ext/openssl/ossl_asn1.c', line 1061



static VALUE
ossl_asn1_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE value, tag, tagging, tag_class;
    int default_tag;

    rb_scan_args(argc, argv, "13", &value, &tag, &tagging, &tag_class);
    default_tag = ossl_asn1_default_tag(self);

    if (default_tag == -1 || argc > 1) {
	if(NIL_P(tag))
	    ossl_raise(eASN1Error, "must specify tag number");
	if(!NIL_P(tagging) && !SYMBOL_P(tagging))
	    ossl_raise(eASN1Error, "invalid tagging method");
	if(NIL_P(tag_class)) {
	    if (NIL_P(tagging))
		tag_class = sym_UNIVERSAL;
	    else
		tag_class = sym_CONTEXT_SPECIFIC;
	}
	if(!SYMBOL_P(tag_class))
	    ossl_raise(eASN1Error, "invalid tag class");
    }
    else{
	tag = INT2NUM(default_tag);
	tagging = Qnil;
	tag_class = sym_UNIVERSAL;
    }
    ossl_asn1_set_tag(self, tag);
    ossl_asn1_set_value(self, value);
    ossl_asn1_set_tagging(self, tagging);
    ossl_asn1_set_tag_class(self, tag_class);
    ossl_asn1_set_indefinite_length(self, Qfalse);
    if (default_tag == V_ASN1_BIT_STRING)
	rb_ivar_set(self, sivUNUSED_BITS, INT2FIX(0));

    return self;
}


  







Instance Method Details



  

    #to_der  ⇒ DER-encoded String   



  

    

See ASN1Data#to_der for details.


  



  [ GitHub ]


  

  


# File 'ext/openssl/ossl_asn1.c', line 1127



static VALUE
ossl_asn1prim_to_der(VALUE self)
{
    ASN1_TYPE *asn1;
    long alllen, bodylen;
    unsigned char *p0, *p1;
    int j, tag, tc, state;
    VALUE str;

    if (ossl_asn1_default_tag(self) == -1) {
	str = ossl_asn1_get_value(self);
	return to_der_internal(self, 0, 0, StringValue(str));
    }

    asn1 = ossl_asn1_get_asn1type(self);
    alllen = i2d_ASN1_TYPE(asn1, NULL);
    if (alllen < 0) {
	ASN1_TYPE_free(asn1);
	ossl_raise(eASN1Error, "i2d_ASN1_TYPE");
    }
    str = ossl_str_new(NULL, alllen, &state);
    if (state) {
	ASN1_TYPE_free(asn1);
	rb_jump_tag(state);
    }
    p0 = p1 = (unsigned char *)RSTRING_PTR(str);
    i2d_ASN1_TYPE(asn1, &p0);
    ASN1_TYPE_free(asn1);
    assert(p0 - p1 == alllen);

    /* Strip header since to_der_internal() wants only the payload */
    j = ASN1_get_object((const unsigned char **)&p1, &bodylen, &tag, &tc, alllen);
    if (j & 0x80)
	ossl_raise(eASN1Error, "ASN1_get_object"); /* should not happen */

    return to_der_internal(self, 0, 0, rb_str_drop_bytes(str, alllen - bodylen));
}