asn1_write_value(3) libtasn1 asn1_write_value(3)

NAME asn1_write_value - Set the value of one element inside a structure.

SYNOPSIS #include <libtasn1.h>

asn1_retCode asn1_write_value(ASN1_TYPE node_root, const char * name, const void * ivalue, int len);

ARGUMENTS ASN1_TYPE 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 twos 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 twos 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: "YYMMD- DhhmmssZ", "YYMMDDhhmmssZ", "YYMMDDhhmmss+hhmm", "YYMMDDhhmmss-hh mm ", "YYMMDDhhmm+hh mm ", or "YYMMDDhhmm-hhmm". 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", "YYYYMMDDhh- mmss.sZ", "YYYYMMDDhhmmss.s+hhmm", "YYYYMMDDhhmmss.s-hhmm ", "YYYYM- MDDhhmm+hhmm", or "YYYYMMDDhhmm-hhmm" where ss.s indicates the sec- onds 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 coctains tce octetcstring 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 alterna- tives 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 its the first one, "?2" for the second and so on.

Using "pkix.asn"

result=asn1_write_value(cert, "certificate1.tbsCertificate.sub- ject.rdnSequence", "NEW", 1);

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

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

RETURNS ASN1_SUCCESS Set value OK.

ASN1_ELEMENT_NOT_FOUND NAME is not a valid element.

ASN1_VALUE_NOT_VALID VALUE has a wrong format.

COPYRIGHT Copyright © 2006, 2007, 2008, 2009 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 2.3 asn1_write_value(3)