class OpenSSL::ASN1::Constructive

The parent class for all constructed encodings. The value attribute of a Constructive is always an Array. Attributes are the same as for ASN1Data, with the addition of tagging.

SET and SEQUENCE ↑

Most constructed encodings come in the form of a SET or a SEQUENCE. These encodings are represented by one of the two sub-classes of Constructive:

Please note that tagged sequences and sets are still parsed as instances of ASN1Data. Find further details on tagged values there.

Example - constructing a SEQUENCE ↑

int = OpenSSL::ASN1::Integer.new(1)
str = OpenSSL::ASN1::PrintableString.new('abc')
sequence = OpenSSL::ASN1::Sequence.new( [ int, str ] )

Example - constructing a SET ↑

int = OpenSSL::ASN1::Integer.new(1)
str = OpenSSL::ASN1::PrintableString.new('abc')
set = OpenSSL::ASN1::Set.new( [ int, str ] )

Public Instance Methods

each { |asn1| block } → asn1_ary

Calls the given block once for each element in self, passing that element as parameter asn1. If no block is given, an enumerator is returned instead.

Example ↑

asn1_ary.each do |asn1|
  puts asn1
end

# File ext/openssl/lib/openssl/asn1.rb, line 148
def each(&blk)
  @value.each(&blk)

  self
end
to_der → DER-encoded String

See ASN1Data#to_der for details.

static VALUE
ossl_asn1cons_to_der(VALUE self)
{
    VALUE ary, str;
    long i;
    int indef_len;

    indef_len = RTEST(ossl_asn1_get_indefinite_length(self));
    ary = rb_convert_type(ossl_asn1_get_value(self), T_ARRAY, "Array", "to_a");
    str = rb_str_new(NULL, 0);
    for (i = 0; i < RARRAY_LEN(ary); i++) {
        VALUE item = RARRAY_AREF(ary, i);

        if (indef_len && rb_obj_is_kind_of(item, cASN1EndOfContent)) {
            if (i != RARRAY_LEN(ary) - 1)
                ossl_raise(eASN1Error, "illegal EOC octets in value");

            /*
             * EOC is not really part of the content, but we required to add one
             * at the end in the past.
             */
            break;
        }

        item = ossl_to_der_if_possible(item);
        StringValue(item);
        rb_str_append(str, item);
    }

    return to_der_internal(self, 1, indef_len, str);
}