[#CMS_digest_create_ex]
= CMS_digest_create_ex
:mrdocs:

Create a CMS DigestedData ContentInfo using a library context and property query.

== Synopsis

Declared in `<openssl/cms.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:CMS_ContentInfo.adoc[CMS_ContentInfo]*
CMS_digest_create_ex(
    xref:BIO.adoc[BIO]* in,
    xref:EVP_MD.adoc[EVP_MD] const* md,
    unsigned int flags,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq);
----

== Return Value

New DigestedData ContentInfo, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *in*
| BIO supplying the data to digest.
| *md*
| Message digest algorithm to apply.
| *flags*
| Optional CMS flags; CMS_DETACHED and CMS_STREAM are supported.
| *libctx*
| Library context for algorithm fetches, or NULL for the default.
| *propq*
| Property query for provider selection, or NULL.
|===


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