[#PKCS7_get_attribute]
= PKCS7_get_attribute
:mrdocs:

Return an unauthenticated attribute of type `nid` from a PKCS#7 signer info.

== Synopsis

Declared in `<openssl/pkcs7.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:ASN1_TYPE.adoc[ASN1_TYPE]*
PKCS7_get_attribute(
    xref:PKCS7_SIGNER_INFO.adoc[PKCS7_SIGNER_INFO] const* si,
    int nid);
----

== Return Value

Pointer to the attribute value, or NULL if not present.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *si*
| Signer info whose unauthenticated attributes are searched.
| *nid*
| Attribute type NID to look up.
|===


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