[#EVP_PKEY_meth_set_verifyctx]
= EVP_PKEY_meth_set_verifyctx
:mrdocs:

Set digest‐context verification callbacks on an EVP_PKEY_METHOD (deprecated).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
void
EVP_PKEY_meth_set_verifyctx(
    xref:EVP_PKEY_METHOD.adoc[EVP_PKEY_METHOD]* pmeth,
    int(* verifyctx_init)(xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]*, xref:EVP_MD_CTX.adoc[EVP_MD_CTX]*),
    int(* verifyctx)(xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]*, unsigned char const*, int, xref:EVP_MD_CTX.adoc[EVP_MD_CTX]*));
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *pmeth*
| Method table to update.
| *verifyctx_init*
| Optional initialiser called before streaming verify, or NULL.
| *verifyctx*
| Callback that verifies `sig` against digest state in `mctx,` or NULL to clear.
|===


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