asn1_write_value(3)						     libtasn1						       asn1_write_value(3)

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'", "YYMMDDhh-
       mmss-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 STRING

       VALUE contains the octet string and LEN is the number of octets.

       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 coctains 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 (C) 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.

libtasn1								3.3						       asn1_write_value(3)