asn1_parser2array(3)

✨ asn1_parser2array(3) ✨

okay bestie, so this one lives in the libtasn1 manual (section 3, the library-call section, iykyk) and it's genuinely one of those little glue functions that eats an ASN.1 file for breakfast and spits out C code. let's get into it 💖

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🌸 NAME 🌸

asn1_parser2array — it's an API function, that's the whole vibe. no cap.

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🦋 SYNOPSIS 🦋

#include <libtasn1.h>

int asn1_parser2array(const char * inputFileName, const char *
outputFileName, const char * vectorName, char * error_desc);

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🎀 ARGUMENTS 🎀

four args, all of them matter, let's go one by one:

• const char * inputFileName — the path and the name of the file that's holding your ASN.1 declarations. this is the source of truth, the main character, the file you're reading from.
• const char * outputFileName — the path and the name of the file that's gonna contain the C vector definition. yes you have to give it both the path and the name, it's not psychic.
• const char * vectorName — the name you want the C vector to have. you get to pick it! iconic.
• char * error_desc — this is where the error description gets returned, OR an empty string if everything went fine. so if it's empty, you ate. if it's not, read it 👀

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💅 DESCRIPTION 💅

so basically this function generates a C structure from an ASN1 file. that's the whole job. it creates a file containing a C vector that you then use to manage the definitions that were included in the inputFileName file. like, it's translating your ASN.1 into C so C can actually deal with it.

and here's the cute part where it fills in the blanks for you 🫶:

• if inputFileName is "/aa/bb/xx.yy" and outputFileName is NULL, the file it creates is "/aa/bb/xx_asn1_tab.c".
• if vectorName is NULL, the vector name is gonna be "xx_asn1_tab".

so yeah, pass NULL and it just... does the sensible thing. love that for us.

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⭐ RETURNS ⭐

here's your vibe check, all the possible return values, no skipping:

• ASN1_SUCCESS — the file has correct syntax and every identifier is known. slay, this is the good one.
• ASN1_FILE_NOT_FOUND — something went wrong while opening inputFileName. she's not there, bestie 😭
• ASN1_SYNTAX_ERROR — the syntax is not correct.
• ASN1_IDENTIFIER_NOT_FOUND — there's an identifier in the file that just... isn't defined anywhere. rip.
• ASN1_NAME_TOO_LONG — there's an identifier in the file with more than ASN1_MAX_NAME_SIZE characters. too long, too much, unacceptable 💀

fr fr, check that return value. every single time. don't be the person who ignores it and then wonders why nothing works.

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👑 COPYRIGHT 👑

Copyright © 2006-2025 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.

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🌈 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/

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and that's the whole page, bestie 🧚✨ this was libtasn1 version 4.21.0, and yeah it's asn1_parser2array(3) in case you lost track. go forth and parse responsibly 🍓💜