[#EVP_DigestFinal]
= EVP_DigestFinal
:mrdocs:

Finalize a digest computation and write the message digest.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_DigestFinal(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    unsigned char* md,
    unsigned int* s);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest context that has been updated with message data.
| *md*
| Output buffer of at least EVP_MD_size bytes receiving the digest.
| *s*
| Optional pointer receiving the digest length in bytes, or NULL.
|===


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