[#CMS_verify]
= CMS_verify
:mrdocs:

Verify CMS SignedData signatures and write the content to `out` when requested.

== Synopsis

Declared in `<openssl/cms.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
CMS_verify(
    xref:CMS_ContentInfo.adoc[CMS_ContentInfo]* cms,
    xref:stack_st_X509.adoc[stack_st_X509]* certs,
    xref:X509_STORE.adoc[X509_STORE]* store,
    xref:BIO.adoc[BIO]* dcont,
    xref:BIO.adoc[BIO]* out,
    unsigned int flags);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *cms*
| SignedData ContentInfo to verify.
| *certs*
| Optional untrusted certificates to aid signer location, or NULL.
| *store*
| Trusted certificate store used to build and validate signer chains, or NULL.
| *dcont*
| Detached content BIO when the payload is not embedded; otherwise NULL.
| *out*
| Optional BIO that receives the verified content, or NULL.
| *flags*
| CMS verify flags (for example CMS_NO_SIGNER_CERT_VERIFY).
|===


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