[#EVP_SignFinal_ex]
= EVP_SignFinal_ex
:mrdocs:

Finish a legacy Sign operation with an explicit library context and property query.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_SignFinal_ex(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    unsigned char* md,
    unsigned int* s,
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest/sign context that has absorbed the message via EVP_DigestUpdate().
| *md*
| Output buffer for the signature.
| *s*
| Receives the signature length in bytes.
| *pkey*
| Private key used to produce the signature.
| *libctx*
| Library context for algorithm fetches, or NULL for the default.
| *propq*
| Property query string, or NULL.
|===


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