---
name: "i2d_CMS_bio_stream"
section: "3ssl"
platform: "linux"
package: "openssl"
version: "3.6.5-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/i2d_CMS_bio_stream"
---

# i2d\_CMS\_bio\_stream(3ssl)

output CMS\_ContentInfo structure in BER format

## NAME

i2d\_CMS\_bio\_stream - output CMS\_ContentInfo structure in BER format

## SYNOPSIS

```
 #include <openssl/cms.h>
 int i2d_CMS_bio_stream(BIO *out, CMS_ContentInfo *cms, BIO *data, int flags);
```

## DESCRIPTION

**i2d\_CMS\_bio\_stream()** outputs a CMS\_ContentInfo structure in BER format.

It is otherwise identical to the function **SMIME\_write\_CMS()**.

## NOTES

This function is effectively a version of the **i2d\_CMS\_bio()** supporting streaming.

## BUGS

The prefix "i2d" is arguably wrong because the function outputs BER format.

## RETURN VALUES

**i2d\_CMS\_bio\_stream()** returns 1 for success or 0 for failure.

## SEE ALSO

**ERR\_get\_error**(3), **CMS\_sign**(3), **CMS\_verify**(3), **CMS\_encrypt**(3) **CMS\_decrypt**(3), **SMIME\_write\_CMS**(3), **PEM\_write\_bio\_CMS\_stream**(3)

## HISTORY

The **i2d\_CMS\_bio\_stream()** function was added in OpenSSL 1.0.0.

## COPYRIGHT

Copyright 2008-2016 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\>.