[#EVP_PKEY_asn1_set_private]
= EVP_PKEY_asn1_set_private
:mrdocs:

Install PKCS#8 private‐key decode, encode, and print callbacks on an ASN.1 method.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
EVP_PKEY_asn1_set_private(
    xref:EVP_PKEY_ASN1_METHOD.adoc[EVP_PKEY_ASN1_METHOD]* ameth,
    int(* priv_decode)(xref:EVP_PKEY.adoc[EVP_PKEY]*, xref:PKCS8_PRIV_KEY_INFO.adoc[PKCS8_PRIV_KEY_INFO] const*),
    int(* priv_encode)(xref:PKCS8_PRIV_KEY_INFO.adoc[PKCS8_PRIV_KEY_INFO]*, xref:EVP_PKEY.adoc[EVP_PKEY] const*),
    int(* priv_print)(xref:BIO.adoc[BIO]*, xref:EVP_PKEY.adoc[EVP_PKEY] const*, int, xref:ASN1_PCTX.adoc[ASN1_PCTX]*));
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ameth*
| ASN.1 method being customized.
| *priv_decode*
| Decode a PKCS8_PRIV_KEY_INFO into `pk.`
| *priv_encode*
| Encode `pk` into a PKCS8_PRIV_KEY_INFO.
| *priv_print*
| Print the private key to a BIO.
|===


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