[#EVP_DigestSignFinal]
= EVP_DigestSignFinal
:mrdocs:

Finalize a DigestSign operation and write the signature.

== Synopsis

Declared in `<openssl/evp.h>`

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

== Return Value

1 on success, or 0 / a negative value on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Context initialized with EVP_DigestSignInit and updated with EVP_DigestSignUpdate.
| *sigret*
| Buffer receiving the signature, or NULL to only query the required length.
| *siglen*
| On entry, size of `sigret;` on exit, signature length (or required size).
|===


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