---
name: "gnutls_certificate_set_x509_simple_pkcs12_file"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_certificate_set_x509_simple_pkcs12_file"
---

# gnutls\_certificate\_set\_x509\_simple\_pkcs12\_file(3)

API function

## NAME

gnutls\_certificate\_set\_x509\_simple\_pkcs12\_file - API function

## SYNOPSIS

**#include \<gnutls/gnutls.h\>**

**int gnutls\_certificate\_set\_x509\_simple\_pkcs12\_file(gnutls\_certificate\_credentials\_t** *res***, const char \*** *pkcs12file***, gnutls\_x509\_crt\_fmt\_t** *type***, const char \*** *password***);**

## ARGUMENTS

- gnutls\_certificate\_credentials\_t res

  is a **gnutls\_certificate\_credentials\_t** type.

- const char \* pkcs12file

  filename of file containing PKCS**12** blob.

- gnutls\_x509\_crt\_fmt\_t type

  is PEM or DER of the  *pkcs12file* .

- const char \* password

  optional password used to decrypt PKCS**12** file, bags and keys.

## DESCRIPTION

This function sets a certificate/private key pair and/or a CRL in the gnutls\_certificate\_credentials\_t type.  This function may be called more than once (in case multiple keys/certificates exist for the server).

PKCS**12** files with a MAC, encrypted bags and PKCS **8** private keys are supported. However, only password based security, and the same password for all operations, are supported.

PKCS**12** file may contain many keys and/or certificates, and this function will try to auto-detect based on the key ID the certificate and key pair to use. If the PKCS**12** file contain the issuer of the selected certificate, it will be appended to the certificate to form a chain.

If more than one private keys are stored in the PKCS**12** file, then only one key will be read (and it is undefined which one).

It is believed that the limitations of this function is acceptable for most usage, and that any more flexibility would introduce complexity that would make it harder to use this functionality at all.

Note that, this function by default returns zero on success and a negative value on error. Since 3.5.6, when the flag **GNUTLS\_CERTIFICATE\_API\_V2** is set using **gnutls\_certificate\_set\_flags()** it returns an index (greater or equal to zero). That index can be used to other functions to refer to the added key-pair.

## RETURNS

On success this functions returns zero, and otherwise a negative value on error (see above for modifying that behavior).

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2023 Free Software Foundation, Inc., and others.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

## SEE ALSO

The full documentation for **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

- https://www.gnutls.org/manual/