asn1_get_tag_der(3) libtasn1 asn1_get_tag_der(3)

asn1_get_tag_der - API function

#include <libtasn1.h>

int asn1_get_tag_der(const unsigned char * der, int der_len, unsigned char * cls, int * len, unsigned long * tag);

DER data to decode.
Length of DER data to decode.
Output variable containing decoded class.
Output variable containing the length of the DER TAG data.
Output variable containing the decoded tag (may be NULL).

Decode the class and TAG from DER code.

Returns ASN1_SUCCESS on success, or an error.

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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

should give you access to the complete manual. As an alternative you may obtain the manual from:
4.18.0 libtasn1