[#SMIME_write_ASN1]
= SMIME_write_ASN1
:mrdocs:

Write an ASN.1 CMS/PKCS#7 value as an S/MIME message (default library context).

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SMIME_write_ASN1(
    xref:BIO.adoc[BIO]* bio,
    xref:ASN1_VALUE.adoc[ASN1_VALUE]* val,
    xref:BIO.adoc[BIO]* data,
    int flags,
    int ctype_nid,
    int econt_nid,
    xref:stack_st_X509_ALGOR.adoc[stack_st_X509_ALGOR]* mdalgs,
    xref:ASN1_ITEM.adoc[ASN1_ITEM] const* it);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *bio*
| BIO that receives the S/MIME output.
| *val*
| CMS_ContentInfo or PKCS7 value to wrap (not const because streaming may update state).
| *data*
| Optional content BIO when streaming / detached content is used, or NULL.
| *flags*
| CMS_* / SMIME_* flags (for example CMS_DETACHED, CMS_TEXT, CMS_STREAM).
| *ctype_nid*
| NID of the content type.
| *econt_nid*
| NID of the embedded content type.
| *mdalgs*
| Digest algorithms for SignedData, or NULL when unused.
| *it*
| Item descriptor such as ASN1_ITEM_rptr(CMS_ContentInfo) or ASN1_ITEM_rptr(PKCS7).
|===


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