[#EVP_PKEY_digestsign_supports_digest]
= EVP_PKEY_digestsign_supports_digest
:mrdocs:

Query whether digest `name` can be used for DigestSign/Verify with `pkey.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_digestsign_supports_digest(
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* name,
    char const* propq);
----

== Return Value

1 if supported, 0 if not, or a negative value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pkey*
| Public key whose signature algorithm is checked.
| *libctx*
| Library context for algorithm fetches, or NULL for the default.
| *name*
| Digest algorithm name (for example "SHA256").
| *propq*
| Property query for provider selection, or NULL.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#