[#EVP_DigestVerifyFinal]
= EVP_DigestVerifyFinal
:mrdocs:

Finish a DigestVerify operation by checking `sig` against the digested data.

== Synopsis

Declared in `<openssl/evp.h>`

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

== 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*
| Context initialized with EVP_DigestVerifyInit() and updated with the message.
| *sig*
| Signature bytes to verify.
| *siglen*
| Length of `sig` in bytes.
|===


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