X509_SIG_GET0(3)

💖 NAME 💖

X509_SIG_get0, X509_SIG_getm — the DigestInfo functions, bestie 💅

✨ SYNOPSIS ✨

library “libcrypto” #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 🦋

Okay so X509_SIG_get0() is the one that hands you back pointers to the algorithm identifier and the digest value that live inside sig. Very demure, very "here are your pointers" 🫶

X509_SIG_getm() is literally identical to X509_SIG_get0(), except the pointers it gives back are not constant and can be modified — for example, to initialise them. Same vibe, slightly more freedom. Periodt 💖

🎀 SEE ALSO 🎀

• d2i_X509(3)
• X509_SIG_new(3)

🌈 HISTORY 🌈

X509_SIG_get0() and X509_SIG_getm() first appeared in OpenSSL 1.1.0 and have been available since OpenBSD 7.1. Iconic behaviour, no cap ✨

xoxo, Debian — June 8, 2025 — X509_SIG_GET0(3) 💅🎀