1asn1_der_decoding_startEnd(3)      libtasn1      asn1_der_decoding_startEnd(3)
2
3
4

NAME

6       asn1_der_decoding_startEnd - Find the start and end point of an element
7       in a DER encoding string.
8

SYNOPSIS

10       #include <libtasn1.h>
11
12       asn1_retCode asn1_der_decoding_startEnd(ASN1_TYPE element, const void *
13       ider, int len, const char * name_element, int * start, int * end);
14

ARGUMENTS

16       ASN1_TYPE element
17                   pointer to an ASN1 element
18
19       const void * ider
20                   vector that contains the DER encoding.
21
22       int len     number of bytes of *ider: ider[0]..ider[len-1]
23
24       const char * name_element
25                   an element of NAME structure.
26
27       int * start the  position  of  the  first byte of NAME_ELEMENT decoding
28                   (ider[*start])
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30       int * end   the position of the  last  byte  of  NAME_ELEMENT  decoding
31                   (ider[*end])
32

DESCRIPTION

34       Find  the start and end point of an element in a DER encoding string. I
35       mean that if you have a der encoding and  you  have  already  used  the
36       function  "asn1_der_decoding"  to  fill a structure, it may happen that
37       you want to find the piece of  string  concerning  an  element  of  the
38       structure.
39

EXAMPLE

41       the sequence "tbsCertificate" inside an X509 certificate.
42

RETURNS

ASN1_SUCCESS
45       DER encoding OK.
46

ASN1_ELEMENT_NOT_FOUND
48       ELEMENT is ASN1_TYPE EMPTY or NAME_ELEMENT is not a valid element.
49
50       ASN1_TAG_ERROR,ASN1_DER_ERROR:  the  der  encoding  doesn't  match  the
51       structure ELEMENT.
52

54       Copyright © 2006, 2007, 2008, 2009 Free Software Foundation, Inc..
55       Copying and distribution of this file, with  or  without  modification,
56       are  permitted  in  any  medium  without royalty provided the copyright
57       notice and this notice are preserved.
58

SEE ALSO
60       The full documentation for libtasn1 is maintained as a Texinfo  manual.
61       If  the info and libtasn1 programs are properly installed at your site,
62       the command
63
64              info libtasn1
65
66       should give you access to the complete manual.
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68
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70libtasn1                              2.3        asn1_der_decoding_startEnd(3)



        

    


            
        

        

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