[#EVP_VerifyFinal]
= EVP_VerifyFinal
:mrdocs:

Finish a verify operation by checking `sigbuf` against the digested data.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_VerifyFinal(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    unsigned char const* sigbuf,
    unsigned int siglen,
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey);
----

== Return Value

1 if the signature is valid, 0 if it is invalid, or a negative value on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest/verify context that has absorbed the message via EVP_DigestUpdate().
| *sigbuf*
| Signature bytes to verify.
| *siglen*
| Length of `sigbuf` in bytes.
| *pkey*
| Public key used for verification.
|===


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