End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
class method
OpenSSL::ASN1.traverse
OpenSSL::ASN1.traverse(asn1) → nil
ext/openssl/ossl_asn1.c
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static VALUE
ossl_asn1_traverse(VALUE self, VALUE obj)
{
unsigned char *p;
VALUE tmp;
long len, read = 0, offset = 0;
obj = ossl_to_der_if_possible(obj);
tmp = rb_str_new4(StringValue(obj));
p = (unsigned char *)RSTRING_PTR(tmp);
len = RSTRING_LEN(tmp);
ossl_asn1_decode0(&p, len, &offset, 0, 1, &read);
RB_GC_GUARD(tmp);
int_ossl_decode_sanity_check(len, read, offset);
return Qnil;
}
If a block is given, it prints out each of the elements encountered. Block parameters are (in that order):
-
depth: The recursion depth, plus one with each constructed value being encountered (
Integer) -
offset: Current byte offset (
Integer) -
header length: Combined length in bytes of the Tag and Length headers. (
Integer) -
length: The overall remaining length of the entire data (
Integer) -
constructed: Whether this value is constructed or not (Boolean)
-
tag_class: Current tag class (
Symbol) -
tag: The current tag number (
Integer)
Example
Example
der = File.binread('asn1data.der') OpenSSL::ASN1.traverse(der) do | depth, offset, header_len, length, constructed, tag_class, tag| puts "Depth: #{depth} Offset: #{offset} Length: #{length}" puts "Header length: #{header_len} Tag: #{tag} Tag class: #{tag_class} Constructed: #{constructed}" end