NAME

       asn1_write_value - API function

SYNOPSIS

       #include <libtasn1.h>

       int asn1_write_value(asn1_node node_root, const char * name, const void * ivalue, int len);

ARGUMENTS

       asn1_node node_root
                   pointer to a structure

       const char * name
                   the name of the element inside the structure that you want to set.

       const void * ivalue
                   vector  used to specify the value to set. If len is >0, VALUE must be a two's complement form
                   integer.  if len=0 *VALUE must be a null terminated string with an integer value.

       int len     number of bytes of *value to use to set the value: value[0]..value[len-1] or 0 if value is  a
                   null terminated string

DESCRIPTION

       Set the value of one element inside a structure.

       If  an  element  is  OPTIONAL  and  you  want to delete it, you must use the value=NULL and len=0.  Using
       "pkix.asn":

       result=asn1_write_value(cert, "tbsCertificate.issuerUniqueID", NULL, 0);

       Description for each type:

INTEGER

       VALUE must contain a two's complement form integer.

       value[0]=0xFF ,               len=1 -> integer=-1.  value[0]=0xFF value[1]=0xFF ,  len=2  ->  integer=-1.
       value[0]=0x01  ,                len=1  -> integer= 1.  value[0]=0x00 value[1]=0x01 , len=2 -> integer= 1.
       value="123"                 , len=0 -> integer= 123.

ENUMERATED

       As INTEGER (but only with not negative numbers).

BOOLEAN

       VALUE must be the null terminated string "TRUE" or "FALSE" and LEN != 0.

       value="TRUE" , len=1 -> boolean=TRUE.  value="FALSE" , len=1 -> boolean=FALSE.

       OBJECT IDENTIFIER: VALUE must be a null terminated string with each  number  separated  by  a  dot  (e.g.
       "1.2.3.543.1").  LEN != 0.

       value="1 2 840 10040 4 3" , len=1 -> OID=dsa-with-sha.

UTCTIME

       VALUE  must  be  a  null  terminated  string  in  one of these formats: "YYMMDDhhmmssZ", "YYMMDDhhmmssZ",
       "YYMMDDhhmmss+hh'mm'", "YYMMDDhhmmss-hh'mm'", "YYMMDDhhmm+hh'mm'", or "YYMMDDhhmm-hh'mm'".  LEN != 0.

       value="9801011200Z" , len=1 -> time=Jannuary 1st, 1998 at 12h 00m Greenwich Mean Time

GENERALIZEDTIME

       VALUE must be in one of this format: "YYYYMMDDhhmmss.sZ", "YYYYMMDDhhmmss.sZ", "YYYYMMDDhhmmss.s+hh'mm'",
       "YYYYMMDDhhmmss.s-hh'mm'",  "YYYYMMDDhhmm+hh'mm'",  or  "YYYYMMDDhhmm-hh'mm'"  where  ss.s  indicates the
       seconds with any precision like "10.1" or "01.02".  LEN != 0

       value="2001010112001.12-0700" , len=1 -> time=Jannuary 1st, 2001 at 12h 00m 01.12s Pacific Daylight Time

       OCTET STcING: VAcUE contcins the octet string and LEN is the number of octets.
               k       k       k
       value="$ssh$x01$ssh$x02$ssh$x03" , len=3 -> three bytes octet string
               l       l       l

GENERALSTRING

       VALUE coctains tce generclstring and LEN is the number of octets.
               k       k       k
       value="$ssh$x01$ssh$x02$ssh$x03" , len=3 -> three bytes generalstring
               l       l       l
       BIT STRIcG: VALUE contains the bit string organized by bytes and LEN is the number of bits.
               k
       value="$ssh$xCF" , len=6 -> bit string="110011" (six bits)
               l

CHOICE

       if NAME indicates a choice type, VALUE must specify one  of  the  alternatives  with  a  null  terminated
       string. LEN != 0. Using "pkix.asn"

       result=asn1_write_value(cert, "certificate1.tbsCertificate.subject", "rdnSequence", 1);

ANY

       VALUE indicates the der encoding of a structure.  LEN != 0.

       SEQUENCE  OF:  VALUE must be the null terminated string "NEW" and LEN != 0. With this instruction another
       element is appended in the sequence. The name of this element will be "?1" if it's the  first  one,  "?2"
       for the second and so on.

       Using "pkix.asn"

       result=asn1_write_value(cert, "certificate1.tbsCertificate.subject.rdnSequence", "NEW", 1);

       SET OF: the same as SEQUENCE OF.  Using "pkix.asn":

       result=asn1_write_value(cert, "tbsCertificate.subject.rdnSequence.?LAST", "NEW", 1);

RETURNS

       ASN1_SUCCESS  if  the  value  was  set,  ASN1_ELEMENT_NOT_FOUND  if   name  is  not  a valid element, and
       ASN1_VALUE_NOT_VALID if  ivalue has a wrong format.

COPYRIGHT

       Copyright © 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/