[#PKCS7_verify]
= PKCS7_verify
:mrdocs:

Verify a PKCS#7 signedData structure and optionally write the content.

== Synopsis

Declared in `<openssl/pkcs7.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PKCS7_verify(
    xref:PKCS7.adoc[PKCS7]* p7,
    xref:stack_st_X509.adoc[stack_st_X509]* certs,
    xref:X509_STORE.adoc[X509_STORE]* store,
    xref:BIO.adoc[BIO]* indata,
    xref:BIO.adoc[BIO]* out,
    int flags);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *p7*
| Signed PKCS#7 object to verify.
| *certs*
| Optional untrusted certificates that may complete signer chains.
| *store*
| Trusted certificate store used for chain verification.
| *indata*
| BIO supplying detached content when the signature does not embed it.
| *out*
| Optional BIO that receives the verified content.
| *flags*
| PKCS7_* verification flags (for example PKCS7_NOVERIFY, PKCS7_DETACHED).
|===


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