@deftypefun {int} {gnutls_certificate_set_rawpk_key_file} (gnutls_certificate_credentials_t @var{cred}, const char* @var{rawpkfile}, const char* @var{privkeyfile}, gnutls_x509_crt_fmt_t @var{format}, const char * @var{pass}, unsigned int @var{key_usage}, const char ** @var{names}, unsigned int @var{names_length}, unsigned int @var{privkey_flags}, unsigned int @var{pkcs11_flags})
@var{cred}: is a @code{gnutls_certificate_credentials_t}  type.

@var{rawpkfile}: contains a raw public key in
PKIX.SubjectPublicKeyInfo format.

@var{privkeyfile}: contains a file path to a private key.

@var{format}: encoding of the keys. DER or PEM.

@var{pass}: an optional password to unlock the private key privkeyfile.

@var{key_usage}: an ORed sequence of @code{GNUTLS_KEY_} * flags.

@var{names}: is an array of DNS names belonging to the public-key (NULL if none).

@var{names_length}: holds the length of the names list.

@var{privkey_flags}: an ORed sequence of @code{gnutls_pkcs_encrypt_flags_t} .
These apply to the private key pkey.

@var{pkcs11_flags}: one of gnutls_pkcs11_obj_flags. These apply to URLs.

This function sets a public/private keypair read from file in the
@code{gnutls_certificate_credentials_t}  type to be used for authentication
and/or encryption.  @code{spki} and  @code{privkey} should match otherwise set
signatures cannot be validated. In case of no match this function
returns @code{GNUTLS_E_CERTIFICATE_KEY_MISMATCH} . This function should
be called once for the client because there is currently no mechanism
to determine which raw public-key to select for the peer when there
are multiple present. Multiple raw public keys for the server can be
distinghuished by setting the  @code{names} .

Note here that  @code{spki} is a raw public-key as defined
in RFC7250. It means that there is no surrounding certificate that
holds the public key and that there is therefore no direct mechanism
to prove the authenticity of this key. The keypair can be used during
a TLS handshake but its authenticity should be established via a
different mechanism (e.g. TOFU or known fingerprint).

The supported formats are basic unencrypted key, PKCS8, PKCS12,
and the openssl format and will be autodetected.

If the raw public-key and the private key are given in PEM encoding
then the strings that hold their values must be null terminated.

Key usage (as defined by X.509 extension (2.5.29.15)) can be explicitly
set because there is no certificate structure around the key to define
this value. See for more info @code{gnutls_x509_crt_get_key_usage()} .

Note that, this function by default returns zero on success and a
negative value on error. Since 3.5.6, when the flag @code{GNUTLS_CERTIFICATE_API_V2} 
is set using @code{gnutls_certificate_set_flags()}  it returns an index
(greater or equal to zero). That index can be used in other functions
to refer to the added key-pair.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, in case the
key pair does not match @code{GNUTLS_E_CERTIFICATE_KEY_MISMATCH}  is returned,
in other erroneous cases a different negative error code is returned.

@strong{Since:} 3.6.6
@end deftypefun