[#EVP_PKEY_asn1_get0_info]
= EVP_PKEY_asn1_get0_info
:mrdocs:

Extract identifying metadata from an EVP_PKEY_ASN1_METHOD.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_asn1_get0_info(
    int* ppkey_id,
    int* pkey_base_id,
    int* ppkey_flags,
    char const** pinfo,
    char const** ppem_str,
    xref:EVP_PKEY_ASN1_METHOD.adoc[EVP_PKEY_ASN1_METHOD] const* ameth);
----

== Return Value

1 on success, or 0 if `ameth` is NULL.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ppkey_id*
| Optional; receives the method's EVP_PKEY type NID.
| *pkey_base_id*
| Optional; receives the base key type NID.
| *ppkey_flags*
| Optional; receives ASN1 method flags (ASN1_PKEY_*).
| *pinfo*
| Optional; receives the human‐readable info string, or NULL.
| *ppem_str*
| Optional; receives the PEM string name used for this key type.
| *ameth*
| ASN.1 method to query; must not be NULL.
|===


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