[#EVP_MD_CTX_set_pkey_ctx]
= EVP_MD_CTX_set_pkey_ctx
:mrdocs:

Attach or clear the EVP_PKEY_CTX owned by a digest context (for DigestSign/DigestVerify).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
EVP_MD_CTX_set_pkey_ctx(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* pctx);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest context that will hold `pctx.`
| *pctx*
| Key context to assign; ownership is transferred to `ctx.` Pass NULL to clear.
|===


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