PKCS12_DECRYPT_SKEY(3ossl)

💅 PKCS12_DECRYPT_SKEY(3ossl) 💅

okay bestie, so this one is an OpenSSL page (that's the 3ossl manual section, iykyk) and it's all about pulling a private key out of a PKCS#12 "shrouded keyBag" — which is literally just a key that someone wrapped up in a password-protected little blanket. We're unwrapping it. Iconic.

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✨ NAME ✨

PKCS12_decrypt_skey, PKCS12_decrypt_skey_ex — the PKCS12 shrouded keyBag decrypt functions. Two of them. Siblings. Fr fr.

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✨ SYNOPSIS ✨

#include <openssl/pkcs12.h>

PKCS8_PRIV_KEY_INFO *PKCS12_decrypt_skey(const PKCS12_SAFEBAG *bag,
                                         const char *pass, int passlen);
PKCS8_PRIV_KEY_INFO *PKCS12_decrypt_skey_ex(const PKCS12_SAFEBAG *bag,
                                            const char *pass, int passlen,
                                            OSSL_LIB_CTX *ctx,
                                            const char *propq);

look at them. so clean. so c. 🎀

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✨ DESCRIPTION ✨

🫶 PKCS12_decrypt_skey()

Decrypts the PKCS#8 shrouded keybag that's contained inside bag, using the password you hand it as pass with length passlen. that's it, that's the whole vibe. you give it a bag, you give it a password, it gives you the key back. slay.

🦋 PKCS12_decrypt_skey_ex()

Basically the same as the one above — like, same energy, same job — but it also lets you pass in a library context ctx and a property query propq, which are used to select algorithm implementations. so if you're the kind of girlie who cares which implementation gets picked, this is your function. main character energy.

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✨ RETURN VALUES ✨

Both functions return the decrypted key. and if something goes wrong? they return NULL. no key for you. 💀 (that's literally it, both of them, same return behaviour.)

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✨ CONFORMING TO ✨

IETF RFC 7292 — yes there's a whole RFC for this, and no I will not be reading it out loud: <https://tools.ietf.org/html/rfc7292>

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🌈 SEE ALSO 🌈

• PKCS8_decrypt_ex(3)
• PKCS8_encrypt_ex(3)
• PKCS12_add_key_ex(3)
• PKCS12_SAFEBAG_create_pkcs8_encrypt_ex(3)

go read those too, they're the extended universe bestie 🧚

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⭐ HISTORY ⭐

PKCS12_decrypt_skey_ex() was added in OpenSSL 3.0. so if you're on something older, that one just doesn't exist yet. sad but true.

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👑 COPYRIGHT 👑

Copyright 2021-2022 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>.

lowkey the important bit: it's Apache License 2.0, and you have to actually comply with it. no vibes-based licensing, bestie. 🙈

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and that's the whole page! 💖 manual page PKCS12_DECRYPT_SKEY(3ossl), straight outta OpenSSL version 3.5.0, dated 2026-09-25 — she's giving polished, she's giving up-to-date, she ate and left no crumbs. periodt. ✨🌸