CMS_DATA_CREATE(3ossl)

💖 CMS_DATA_CREATE(3ossl) 💖

okay so bestie, welcome to CMS_DATA_CREATE(3ossl) — the manual page for making a CMS Data object. it's giving "small but mighty", it's giving "two functions, one job", and honestly? we're obsessed. 🎀

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✨ NAME ✨

CMS_data_create_ex, CMS_data_create — Create CMS Data object 🦋

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🌸 SYNOPSIS 🌸

#include <openssl/cms.h>

CMS_ContentInfo *CMS_data_create_ex(BIO *in, unsigned int flags,
                                    OSSL_LIB_CTX *libctx, const char *propq);
CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags);

no cap, that's the whole thing. copy it exactly, don't get creative with it. 💅

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👑 DESCRIPTION 👑

so like, CMS_data_create_ex() builds you a CMS_ContentInfo structure and sets its type to NID_pkcs7_data. that's the vibe. the actual data? it comes in through the in BIO. 🫶

when it's pulling algorithms from providers, it uses the library context libctx and the property query propq. those two are your plug-ins for where the crypto comes from.

the flags field supports the CMS_STREAM flag. and here's the tea: internally, CMS_final() gets called unless CMS_STREAM is specified. so if you don't ask for streaming, it's getting finalized for you, whether you were ready or not. 😭

once you're done with the CMS_ContentInfo structure, you can free it with CMS_ContentInfo_free(3). clean up after yourself, queen. 🧹✨

and CMS_data_create()? it's literally the same as CMS_data_create_ex(), except it uses default values of NULL for the library context libctx and the property query propq. so if you don't care about that stuff, take the shortcut, it's fine. 🙈

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⭐ RETURN VALUES ⭐

• if the allocation fails, CMS_data_create_ex() and CMS_data_create() return NULL and set an error code you can grab with ERR_get_error(3). not a slay, but at least it tells you why. 💀
• otherwise, they return a pointer to the newly allocated structure. main character pointer energy. 👑

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🌈 SEE ALSO 🌈

• ERR_get_error(3)
• CMS_final(3)

go read those too, iykyk. 📚

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💜 HISTORY 💜

CMS_data_create_ex() was added in OpenSSL 3.0. so it's new-ish, it's fresh, it's got lore. ✨

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🎀 COPYRIGHT 🎀

Copyright 2020-2021 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>.

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real talk: use it responsibly, read your licenses, and never skip the CMS_STREAM caveat. that's the whole plot twist. 💅

and that's the page!! from the OpenSSL girlies, version 3.5.9, dated 2026-09-29 — mwah, xoxo, go create some CMS Data objects bestie 💖🦋🌸