[#SMIME_write_PKCS7]
= SMIME_write_PKCS7
:mrdocs:

Write a PKCS#7 object in S/MIME (PEM/CMS) form to a BIO.

== Synopsis

Declared in `<openssl/pkcs7.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SMIME_write_PKCS7(
    xref:BIO.adoc[BIO]* bio,
    xref:PKCS7.adoc[PKCS7]* p7,
    xref:BIO.adoc[BIO]* data,
    int flags);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *bio*
| Output BIO for the S/MIME message.
| *p7*
| PKCS#7 structure to write.
| *data*
| Optional content BIO for streaming, or NULL when content is already in `p7.`
| *flags*
| SMIME_* writing flags (for example SMIME_DETACHED).
|===


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