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  STRING:  VALUE  contains  the  bit string organized by bytes and LEN is the number of
       bits.   c
               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 © 2006-2013 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/