[#DH_check_pub_key_ex]
= DH_check_pub_key_ex
:mrdocs:

Validate a Diffie‐Hellman public key and report problems via the error queue (deprecated).

== Synopsis

Declared in `<openssl/dh.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
DH_check_pub_key_ex(
    xref:DH.adoc[DH] const* dh,
    xref:BIGNUM.adoc[BIGNUM] const* pub_key);
----

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

1 if the public key looks suitable, or 0 if checks fail (reasons are pushed to the error stack).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dh*
| DH object providing the domain parameters used for the check.
| *pub_key*
| Public key value to validate against those parameters.
|===


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