X509_SIG_GET0(3ossl)

📦
version 15.1 · 3 versions
, in freebsd 15.1

🎀 NAME 🎀

okay bestie, welcome to the X509_SIG_GET0(3ossl) page — OpenSSL manual, DigestInfo business, very niche but we're slaying it. It's all about the DigestInfo functions:

  • X509_SIG_get0
  • X509_SIG_getm

✨ SYNOPSIS ✨

#include <openssl/x509.h>

void X509_SIG_get0(const X509_SIG *sig, const X509_ALGOR **palg,
                   const ASN1_OCTET_STRING **pdigest);
void X509_SIG_getm(X509_SIG *sig, X509_ALGOR **palg,
                   ASN1_OCTET_STRING **pdigest);

💖 DESCRIPTION 💖

So X509_SIG_get0() returns pointers to the algorithm identifier and digest value in sig. That's the whole assignment, no cap.

X509_SIG_getm() is identical to X509_SIG_get0() except the pointers returned are not constant and can be modified: for example to initialise them. yes bestie, that tiny m is doing real work 💅

🫶 RETURN VALUES 🫶

X509_SIG_get0() and X509_SIG_getm() return no values.

not one. not a crumb. they simply do their little pointer thing and leave. 😭

🦋 SEE ALSO 🦋

  • d2i_X509(3) — the other manual page you should go peek at.

real talk, legal text is not getting paraphrased — here it is, verbatim:

Copyright 2002-2020 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>.

💖 that's the page, bestie. source/version vibes: OpenSSL 3.5.6, dated 2026-04-07, and yes, this is the X509_SIG_GET0(3ossl) manual. slay. 🎀

📦 where this page comes from