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asn1_der_decoding_startEnd(3)      libtasn1      asn1_der_decoding_startEnd(3)


NAME

       asn1_der_decoding_startEnd - API function


SYNOPSIS

       #include <libtasn1.h>

       int asn1_der_decoding_startEnd(asn1_node element, const void * ider,
       int ider_len, const char * name_element, int * start, int * end);


ARGUMENTS

       asn1_node element
                   pointer to an ASN1 element

       const void * ider
                   vector that contains the DER encoding.

       int ider_len
                   number of bytes of * ider :  ider [0].. ider [len-1]

       const char * name_element
                   an element of NAME structure.

       int * start the position of the first byte of NAME_ELEMENT decoding (
                   ider [*start])

       int * end   the position of the last byte of NAME_ELEMENT decoding (
                   ider [*end])


DESCRIPTION

       Find the start and end point of an element in a DER encoding string. I
       mean that if you have a der encoding and you have already used the
       function asn1_der_decoding() to fill a structure, it may happen that
       you want to find the piece of string concerning an element of the
       structure.

       One example is the sequence "tbsCertificate" inside an X509
       certificate.

       Note that since libtasn1 3.7 the  ider and  ider_len parameters can be
       omitted, if the element is already decoded using asn1_der_decoding().


RETURNS

       ASN1_SUCCESS if DER encoding OK, ASN1_ELEMENT_NOT_FOUND if ELEMENT is
       asn1_node EMPTY or  name_element is not a valid element, ASN1_TAG_ERROR
       or ASN1_DER_ERROR if the der encoding doesn't match the structure
       ELEMENT.


COPYRIGHT

       Copyright (C) 2006-2022 Free Software Foundation, Inc..
       Copying and distribution of this file, with or without modification,
       are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.


SEE ALSO

       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:

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

libtasn1                            4.19.0       asn1_der_decoding_startEnd(3)

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