PKCS8_PKEY_ADD1_ATTR(3ossl)

✨ PKCS8_PKEY_ADD1_ATTR ✨

okay bestie, so this is the PKCS8_PKEY_ADD1_ATTR(3ossl) page from the OpenSSL manuals and it's literally all about PKCS8 attribute functions 💅 like the little tag-along attributes that ride along with your private key info. she's niche but she's iconic.

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🌸 NAME 🌸

PKCS8_pkey_get0_attrs, PKCS8_pkey_add1_attr, PKCS8_pkey_add1_attr_by_NID, PKCS8_pkey_add1_attr_by_OBJ — the PKCS8 attribute functions, aka the group chat that handles attributes on your PKCS8_PRIV_KEY_INFO 🫶

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🎀 SYNOPSIS 🎀

#include <openssl/x509.h>

const STACK_OF(X509_ATTRIBUTE) *
PKCS8_pkey_get0_attrs(const PKCS8_PRIV_KEY_INFO *p8);
int PKCS8_pkey_add1_attr(PKCS8_PRIV_KEY_INFO *p8, X509_ATTRIBUTE *attr);
int PKCS8_pkey_add1_attr_by_NID(PKCS8_PRIV_KEY_INFO *p8, int nid, int type,
                                const unsigned char *bytes, int len);
int PKCS8_pkey_add1_attr_by_OBJ(PKCS8_PRIV_KEY_INFO *p8, const ASN1_OBJECT *obj,
                               int type, const unsigned char *bytes, int len);

like yes we're including <openssl/x509.h>, no cap, that's the vibe 💖

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🦋 DESCRIPTION 🦋

• PKCS8_pkey_get0_attrs() — she hands you back a const STACK of X509_ATTRIBUTE that's chillin' inside the const PKCS8_PRIV_KEY_INFO structure you passed in as p8. it's giving "look but don't touch" energy 💅
• PKCS8_pkey_add1_attr() — takes an already-constructed X509_ATTRIBUTE called attr and adds it to the existing PKCS8_PRIV_KEY_INFO structure p8. slay, she's joining the party ✨
• PKCS8_pkey_add1_attr_by_NID() and PKCS8_pkey_add1_attr_by_OBJ() — these two construct a brand-new X509_ATTRIBUTE from the arguments you hand them and add it to the existing PKCS8_PRIV_KEY_INFO structure p8. homemade attribute, chef's kiss 👑

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💖 RETURN VALUES 💖

PKCS8_pkey_add1_attr(), PKCS8_pkey_add1_attr_by_NID(), and PKCS8_pkey_add1_attr_by_OBJ() return 1 for success and 0 for failure. that's it, that's the whole personality — binary queen 🎀

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🌈 NOTES 🌈

STACK of X509_ATTRIBUTE is present in many X509-related structures, and some of them have the corresponding set of similar functions. so if this feels familiar, it's because she gets around (affectionately) 🧚

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⭐ SEE ALSO ⭐

• crypto(7)

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👑 COPYRIGHT 👑

Copyright 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>.

fr fr read the license before you do anything wild, bestie 🙈

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version 3.5.9, dated 2026-09-29 — that's the whole page, mwah 💋 go forth and attribute responsibly 🦋💜