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 © 2006-2013 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:
- http://www.gnu.org/software/libtasn1/manual/