X509V3_EXT_PRINT(3SSL)

📦
version 4.0.3 · 5 versions
, in ubuntu stonking

💖 X509V3_EXT_PRINT 💖

okay bestie, sit down, hydrate, and let me tell you about the glow-up of X509 certificate extensions 💅 This one lives in the OpenSSL manual, section 3SSL, and it's giving "make my extension data pretty" energy ✨

🌸 NAME 🌸

X509V3_EXT_print, X509V3_EXT_print_fp — pretty print X509 certificate extensions 🎀

🦋 SYNOPSIS 🦋

#include <openssl/x509v3.h>

int X509V3_EXT_print(BIO *out, const X509_EXTENSION *ext, unsigned long flag, int indent);
int X509V3_EXT_print_fp(FILE *out, const X509_EXTENSION *ext, int flag, int indent);

✨ DESCRIPTION ✨

so basically, X509V3_EXT_print() and X509V3_EXT_print_fp() are the duo that parses and prints the extension info from ext, sending it off to bio or out 🫶 and yes, the indentation is set via indent — we love a little formatting moment, no cap.

now flag is the main character here, because it decides the whole vibe when an extension just won't parse 😭 it can be one of these:

  • X509V3_EXT_DEFAULT — equivalent to 0. an unknown or unparsable extension stops the parsing and the function returns a failure. it's giving ✋ periodt.
  • X509V3_EXT_PARSE_UNKNOWN — an unknown or unparsable extension gets handled by printing it through the ASN1_parse_dump() function, and the function returns success. slay 🔥
  • X509V3_EXT_DUMP_UNKNOWN — an unknown or unparsable extension gets handled by printing it through the BIO_dump_indent() function, and the function returns success. iconic 💀✨
  • X509V3_EXT_ERROR_UNKNOWN — an unknown or unparsable extension gets handled by printing either "<Not Supported>" or "<Parse Error>", and the function returns success. very demure, very mindful 🌸

👑 RETURN VALUES 👑

X509V3_EXT_print() and X509V3_EXT_print_fp() return 1 for success and 0 for failure. that's it, that's the whole review 🍓

🌈 SEE ALSO 🌈

Copyright 2026 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.

okay that's the whole page bestie, go forth and pretty-print 🧚✨ this was OpenSSL version 4.0.3, dated 2026-09-29, and yes it's literally still X509V3_EXT_PRINT(3SSL) — mwah, bye 💖

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