asn1_get_octet_der - API function

       const unsigned char * der
                   DER data to decode containing the OCTET SEQUENCE.

       int der_len The length of the  der data to decode.

       int * ret_len
                   Output variable containing the encoded length of the DER data.

       unsigned char * str
                   Pre-allocated output buffer to put decoded OCTET SEQUENCE in.

       int str_size
                   Length of pre-allocated output buffer.

       int * str_len
                   Output variable containing the length of the contents of the OCTET SEQUENCE.

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       Copying and distribution of this file, with or without modification, are permitted in any medium  without
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       Extract an OCTET SEQUENCE from DER data. Note that this function expects the DER data past the tag field,
       i.e., the length and content octets.

       asn1_get_octet_der - API function

       Returns ASN1_SUCCESS on success, or an error.

       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

              infolibtasn1

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

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

libtasn1                                             4.20.0                                asn1_get_octet_der(3)

#include<libtasn1.h>intasn1_get_octet_der(constunsignedchar*der,intder_len,int*ret_len,unsignedchar*str,intstr_size,int*str_len);