X509_LOAD_HTTP(3ossl)

📦 version 3.5.0, in opensuse-leap 16.0

💖 X509_LOAD_HTTP(3ossl) 💖

okay so you found the OpenSSL manual page for X509_LOAD_HTTP(3ossl) — and it's literally the certificate-and-CRL loading corner of the group chat. bestie, we're about to make HTTP fetch a cert or CRL and it's giving secure-but-flirty. ✨

🌸 NAME 🌸

X509_load_http, X509_http_nbio, X509_CRL_load_http, X509_CRL_http_nbio — certificate and CRL loading functions. periodt. 💅

🎀 SYNOPSIS 🎀

#include <openssl/x509.h>

X509 *X509_load_http(const char *url, BIO *bio, BIO *rbio, int timeout);
X509_CRL *X509_CRL_load_http(const char *url, BIO *bio, BIO *rbio, int timeout);

The following macros have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):

#define X509_http_nbio(rctx, pcert)
#define X509_CRL_http_nbio(rctx, pcrl)

🦋 DESCRIPTION 🦋

X509_load_http() and X509_CRL_load_http() loads a certificate or a CRL, respectively, in ASN.1 format using HTTP from the given url. like, that's the whole mission. 🫶

  • max response size, no cap? actually there is a cap: the maximum size of the HTTP response is 100 kB for certificates and 32 MB for CRLs, and it's hard coded in the functions. 💀
  • bio is given and rbio is NULL — then this BIO is used instead of an internal one for connecting, writing the request, and reading the response. iconique. ✨
  • both bio and rbio are given (which may be memory BIOs, for instance) — then no explicit connection is attempted, bio is used for writing the request, and rbio for reading the response. team work. 🔥
  • timeout is > 0 — this indicates the maximum number of seconds to wait until the transfer is complete. ⏳
  • timeout is 0 — waiting indefinitely, bestie. no clock anxiety. 🌈
  • timeout is < 0 — immediately leads to a timeout condition. not the vibe, but okay. 😭

X509_http_nbio() and X509_CRL_http_nbio() are macros for backward compatibility that have the same effect as the functions above but with infinite timeout and without the possibility to specify custom BIOs.

🌟 RETURN VALUES 🌟

On success the function yield the loaded value, else NULL. Error conditions include connection/transfer timeout, parse errors, etc. so yes, check for NULL, bestie. 💅

🧚 SEE ALSO 🧚

👑 HISTORY 👑

  • X509_load_http() and X509_CRL_load_http() were added in OpenSSL 3.0. 🎀
  • X509_http_nbio() and X509_CRL_http_nbio() were deprecated in OpenSSL 3.0. 🫠

Copyright 2019-2021 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>.

💅 cute sign-off: this was the OpenSSL 3.5.0 manual page, dated 2026-09-25, for X509_LOAD_HTTP(3ossl). bye bestie, go load those certs responsibly 🫶✨
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