CMS\_DATA\_CREATE(3ossl) OpenSSL CMS\_DATA\_CREATE(3ossl) # [NAME](#NAME) CMS\_data\_create\_ex, CMS\_data\_create - Create CMS Data object # [SYNOPSIS](#SYNOPSIS) ``` #include 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); ``` # [DESCRIPTION](#DESCRIPTION) **CMS\_data\_create\_ex()** creates a **CMS\_ContentInfo** structure with a type **NID\_pkcs7\_data**. The data is supplied via the *in* BIO. The library context *libctx* and the property query *propq* are used when retrieving algorithms from providers. The *flags* field supports the **CMS\_STREAM** flag. Internally **CMS\_final()** is called unless **CMS\_STREAM** is specified. The **CMS\_ContentInfo** structure can be freed using [**CMS\_ContentInfo\_free**(3)](/man/os/openssl-4.0/CMS_ContentInfo_free.3). **CMS\_data\_create()** is similar to **CMS\_data\_create\_ex()** but uses default values of NULL for the library context *libctx* and the property query *propq*. # [RETURN VALUES](#RETURN_VALUES) If the allocation fails, **CMS\_data\_create\_ex()** and **CMS\_data\_create()** return NULL and set an error code that can be obtained by [**ERR\_get\_error**(3)](/man/os/openssl-4.0/ERR_get_error.3). Otherwise they return a pointer to the newly allocated structure. # [SEE ALSO](#SEE_ALSO) [**ERR\_get\_error**(3)](/man/os/openssl-4.0/ERR_get_error.3), [**CMS\_final**(3)](/man/os/openssl-4.0/CMS_final.3) # [HISTORY](#HISTORY) The **CMS\_data\_create\_ex()** method was added in OpenSSL 3.0. # [COPYRIGHT](#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>. 2026-09-29 4.0.3 --- Document: CMS_data_create_ex(3ossl) from openssl-4.0 4.0.3-r7 (Chainguard OS)