---
name: "CMS_digest_create"
section: "3ssl"
platform: "linux"
package: "openssl"
version: "3.6.5-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/CMS_digest_create"
---

# CMS\_digest\_create(3ssl)

Create CMS DigestedData object

## NAME

CMS\_digest\_create\_ex, CMS\_digest\_create - Create CMS DigestedData object

## SYNOPSIS

```
 #include <openssl/cms.h>
 CMS_ContentInfo *CMS_digest_create_ex(BIO *in, const EVP_MD *md,
                                       unsigned int flags, OSSL_LIB_CTX *ctx,
                                       const char *propq);
 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
                                    unsigned int flags);
```

## DESCRIPTION

**CMS\_digest\_create\_ex()** creates a **CMS\_ContentInfo** structure with a type **NID\_pkcs7\_digest**. The data supplied via the *in* BIO is digested using *md*. The library context *libctx* and the property query *propq* are used when retrieving algorithms from providers. The *flags* field supports the **CMS\_DETACHED** and **CMS\_STREAM** flags, Internally **CMS\_final()** is called unless **CMS\_STREAM** is specified.

The **CMS\_ContentInfo** structure can be freed using **CMS\_ContentInfo\_free**(3).

**CMS\_digest\_create()** is similar to **CMS\_digest\_create\_ex()** but uses default values of NULL for the library context *libctx* and the property query *propq*.

## RETURN VALUES

If the allocation fails, **CMS\_digest\_create\_ex()** and **CMS\_digest\_create()** return NULL and set an error code that can be obtained by **ERR\_get\_error**(3). Otherwise they return a pointer to the newly allocated structure.

## SEE ALSO

**ERR\_get\_error**(3), **CMS\_final**(3)\>

## HISTORY

The **CMS\_digest\_create\_ex()** method was added in OpenSSL 3.0.

## 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\>.