[#PEM_read_bio_Parameters]
= PEM_read_bio_Parameters
:mrdocs:

Read algorithm parameters (e.g. DH/DSA) from PEM into an EVP_PKEY.

== Synopsis

Declared in `<openssl/pem.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_PKEY.adoc[EVP_PKEY]*
PEM_read_bio_Parameters(
    xref:BIO.adoc[BIO]* bp,
    xref:EVP_PKEY.adoc[EVP_PKEY]** x);
----

== Return Value

Parameter EVP_PKEY on success, or NULL on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *bp*
| BIO to read from.
| *x*
| Optional address of an EVP_PKEY pointer to reuse, or NULL.
|===


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