DOKK / manpages / debian 12 / libtasn1-6-dev / asn1_read_tag.3.en
asn1_read_tag(3) libtasn1 asn1_read_tag(3)

asn1_read_tag - API function

#include <libtasn1.h>

int asn1_read_tag(asn1_node_const root, const char * name, int * tagValue, int * classValue);

pointer to a structure
the name of the element inside a structure.
variable that will contain the TAG value.
variable that will specify the TAG type.

Returns the TAG and the CLASS of one element inside a structure. CLASS can have one of these constants: ASN1_CLASS_APPLICATION, ASN1_CLASS_UNIVERSAL, ASN1_CLASS_PRIVATE or ASN1_CLASS_CONTEXT_SPECIFIC.

ASN1_SUCCESS if successful, ASN1_ELEMENT_NOT_FOUND if
name is not a valid element.

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The full documentation for libtasn1 is maintained as a Texinfo manual. If the info and libtasn1 programs are properly installed at your site, the command

info libtasn1

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https://www.gnu.org/software/libtasn1/manual/
4.19.0 libtasn1