[#CMS_sign_ex]
= CMS_sign_ex
:mrdocs:

Create a CMS SignedData structure using a library context.

== Synopsis

Declared in `<openssl/cms.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:CMS_ContentInfo.adoc[CMS_ContentInfo]*
CMS_sign_ex(
    xref:X509.adoc[X509]* signcert,
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    xref:stack_st_X509.adoc[stack_st_X509]* certs,
    xref:BIO.adoc[BIO]* data,
    unsigned int flags,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq);
----

== Return Value

New SignedData ContentInfo, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *signcert*
| Signer certificate corresponding to `pkey,` or NULL for certificates‐only.
| *pkey*
| Signer private key, or NULL when only embedding certificates.
| *certs*
| Optional intermediate certificates to include, or NULL.
| *data*
| Content BIO to sign (read fully unless CMS_STREAM / CMS_PARTIAL flags apply).
| *flags*
| CMS signing flags (for example CMS_DETACHED, CMS_BINARY).
| *libctx*
| Library context for algorithm fetches, or NULL for the default.
| *propq*
| Property query for provider selection, or NULL.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#