[#OSSL_CRMF_MSGS_verify_popo]
= OSSL_CRMF_MSGS_verify_popo
:mrdocs:

Verify proof‐of‐possession on a CRMF CertReqMessages sequence.

== Synopsis

Declared in `<openssl/crmf.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_CRMF_MSGS_verify_popo(
    xref:OSSL_CRMF_MSGS.adoc[OSSL_CRMF_MSGS] const* reqs,
    int rid,
    int acceptRAVerified,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq);
----

== Return Value

1 if POPO verifies, 0 if not, or ‐1 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *reqs*
| CertReqMessages to verify.
| *rid*
| certReqId of the message to verify, or ‐1 to verify all messages.
| *acceptRAVerified*
| Non‐zero to accept POPO raVerified without further checks.
| *libctx*
| Library context for algorithm fetching, or NULL for the default.
| *propq*
| Property query for algorithm fetching, or NULL.
|===


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