[#PKCS7_add_signer]
= PKCS7_add_signer
:mrdocs:

Attach a prepared signer info to a PKCS#7 SignedData or SignedAndEnvelopedData structure.

== Synopsis

Declared in `<openssl/pkcs7.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
PKCS7_add_signer(
    xref:PKCS7.adoc[PKCS7]* p7,
    xref:PKCS7_SIGNER_INFO.adoc[PKCS7_SIGNER_INFO]* p7i);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *p7*
| PKCS#7 object that already has a signed content type.
| *p7i*
| Signer info to add; the structure retains a reference to it.
|===


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