asn1_der_decoding_startEnd(3)					     libtasn1					     asn1_der_decoding_startEnd(3)

NAME

       asn1_der_decoding_startEnd - Find the start and end point of an element in a DER encoding string.

SYNOPSIS

       #include <libtasn1.h>

       asn1_retCode asn1_der_decoding_startEnd(ASN1_TYPE element, const void * ider, int len, const char * name_element, int * start, int * end);

ARGUMENTS

       ASN1_TYPE element
		   pointer to an ASN1 element

       const void * ider
		   vector that contains the DER encoding.

       int 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.

EXAMPLE

       the sequence "tbsCertificate" inside an X509 certificate.

RETURNS

ASN1_SUCCESS
       DER encoding OK.

ASN1_ELEMENT_NOT_FOUND
       ELEMENT is ASN1_TYPE EMPTY or NAME_ELEMENT is not a valid element.

       ASN1_TAG_ERROR,ASN1_DER_ERROR: the der encoding doesn't match the structure ELEMENT.

COPYRIGHT

       Copyright (C) 2006, 2007, 2008, 2009 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.

libtasn1								2.2					     asn1_der_decoding_startEnd(3)