[#OBJ_find_sigid_by_algs]
= OBJ_find_sigid_by_algs
:mrdocs:

Look up the composite signature NID for a digest and public‐key algorithm pair.

== Synopsis

Declared in `<openssl/objects.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OBJ_find_sigid_by_algs(
    int* psignid,
    int dig_nid,
    int pkey_nid);
----

== Return Value

1 if a mapping was found, or 0 otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *psignid*
| On success, receives the signature algorithm NID.
| *dig_nid*
| Digest algorithm NID (may be NID_undef for pure signatures).
| *pkey_nid*
| Public‐key algorithm NID.
|===


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