PEM_WRITE_BIO_PKCS7_STREAM(3ossl)

💖 PEM_WRITE_BIO_PKCS7_STREAM 💖

okay bestie, gather round, because this one is an OpenSSL man page and it's literally about one single function. her name is PEM_write_bio_PKCS7_stream and she's here to spit out a PKCS7 structure in PEM format. no cap. 🎀

---

✨ NAME ✨

PEM_write_bio_PKCS7_stream — output PKCS7 structure in PEM format 🌸

---

🦋 SYNOPSIS 🦋

#include <openssl/pkcs7.h>

int PEM_write_bio_PKCS7_stream(BIO *out, PKCS7 *p7, BIO *data, int flags);

like look at her. four args. immaculate. 💅

---

🌈 DESCRIPTION 🌈

so PEM_write_bio_PKCS7_stream() outputs a PKCS7 structure in PEM format. that's the whole gig. PEM format, PKCS7 structure, out it goes. 💖

and in every other way it is identical to SMIME_write_PKCS7(). same energy, same behaviour, just a different name doing its own thing. twins fr fr. 👯

---

💀 NOTES 💀

this function is effectively a version of PEM_write_bio_PKCS7() that supports streaming. that's the plot twist, that's the whole reason she exists. 🫶

---

⭐ RETURN VALUES ⭐

• 1 — success!! slay, it worked 🎉
• 0 — failure 😭 something went wrong bestie

---

👑 SEE ALSO 👑

go read these too, they're all part of the same friend group:

• ERR_get_error(3)
• PKCS7_sign(3)
• PKCS7_verify(3)
• PKCS7_encrypt(3)
• PKCS7_decrypt(3)
• SMIME_write_PKCS7(3)
• i2d_PKCS7_bio_stream(3)

---

🧚 HISTORY 🧚

PEM_write_bio_PKCS7_stream() was added in OpenSSL 1.0.0. she's been iconic since day one, periodt. 💜

---

🍓 COPYRIGHT 🍓

Copyright 2007-2016 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>.

---

and that's the whole page, bestie!! 💖 this was OpenSSL version 3.5.9, dated 2026-09-29, and the manual page is PEM_WRITE_BIO_PKCS7_STREAM(3ossl). go stream some PKCS7 responsibly. mwah. 💅✨🎀