[#EVP_KEYEXCH_fetch]
= EVP_KEYEXCH_fetch
:mrdocs:

Fetch a key‐exchange algorithm implementation from providers.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_KEYEXCH.adoc[EVP_KEYEXCH]*
EVP_KEYEXCH_fetch(
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* ctx,
    char const* algorithm,
    char const* properties);
----

== Return Value

Fetched EVP_KEYEXCH, or NULL on error; free with EVP_KEYEXCH_free.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Library context to search, or NULL for the default.
| *algorithm*
| Algorithm name such as "DH" or "X25519".
| *properties*
| Property query string, or NULL.
|===


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