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/*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
* 2010 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
/* Some of the stuff needed for Certificate authentication is contained
* in this file.
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <auth_cert.h>
#include <gnutls_cert.h>
#include <gnutls_datum.h>
#include <gnutls_mpi.h>
#include <gnutls_global.h>
#include <gnutls_algorithms.h>
#include <gnutls_dh.h>
#include <gnutls_str.h>
#include <gnutls_state.h>
#include <gnutls_auth.h>
#include <gnutls_x509.h>
#include "x509/x509_int.h"
#ifdef ENABLE_OPENPGP
# include "openpgp/gnutls_openpgp.h"
#endif
/**
* gnutls_certificate_free_keys - Used to free all the keys from a gnutls_certificate_credentials_t structure
* @sc: is a #gnutls_certificate_credentials_t structure.
*
* This function will delete all the keys and the certificates associated
* with the given credentials. This function must not be called when a
* TLS negotiation that uses the credentials is in progress.
*
**/
void
gnutls_certificate_free_keys (gnutls_certificate_credentials_t sc)
{
unsigned i, j;
for (i = 0; i < sc->ncerts; i++)
{
for (j = 0; j < sc->cert_list_length[i]; j++)
{
_gnutls_gcert_deinit (&sc->cert_list[i][j]);
}
gnutls_free (sc->cert_list[i]);
}
gnutls_free (sc->cert_list_length);
sc->cert_list_length = NULL;
gnutls_free (sc->cert_list);
sc->cert_list = NULL;
for (i = 0; i < sc->ncerts; i++)
{
_gnutls_gkey_deinit (&sc->pkey[i]);
}
gnutls_free (sc->pkey);
sc->pkey = NULL;
sc->ncerts = 0;
}
/**
* gnutls_certificate_free_cas - Used to free all the CAs from a gnutls_certificate_credentials_t structure
* @sc: is a #gnutls_certificate_credentials_t structure.
*
* This function will delete all the CAs associated
* with the given credentials. Servers that do not use
* gnutls_certificate_verify_peers2() may call this to
* save some memory.
*
**/
void
gnutls_certificate_free_cas (gnutls_certificate_credentials_t sc)
{
unsigned j;
for (j = 0; j < sc->x509_ncas; j++)
{
gnutls_x509_crt_deinit (sc->x509_ca_list[j]);
}
sc->x509_ncas = 0;
gnutls_free (sc->x509_ca_list);
sc->x509_ca_list = NULL;
}
/**
* gnutls_certificate_get_x509_cas - Used to export all the CAs from a gnutls_certificate_credentials_t structure
* @sc: is a #gnutls_certificate_credentials_t structure.
* @x509_ca_list: will point to the CA list. Should be treated as constant
* @ncas: the number of CAs
*
* This function will export all the CAs associated
* with the given credentials.
*
* Since: 2.4.0
**/
void
gnutls_certificate_get_x509_cas (gnutls_certificate_credentials_t sc,
gnutls_x509_crt_t ** x509_ca_list,
unsigned int *ncas)
{
*x509_ca_list = sc->x509_ca_list;
*ncas = sc->x509_ncas;
}
/**
* gnutls_certificate_get_x509_crls - Used to export all the CRLs from a gnutls_certificate_credentials_t structure
* @sc: is a #gnutls_certificate_credentials_t structure.
* @x509_crl_list: the exported CRL list. Should be treated as constant
* @ncrls: the number of exported CRLs
*
* This function will export all the CRLs associated with the given
* credentials.
*
* Since: 2.4.0
**/
void
gnutls_certificate_get_x509_crls (gnutls_certificate_credentials_t sc,
gnutls_x509_crl_t ** x509_crl_list,
unsigned int *ncrls)
{
*x509_crl_list = sc->x509_crl_list;
*ncrls = sc->x509_ncrls;
}
#ifdef ENABLE_OPENPGP
/**
* gnutls_certificate_get_openpgp_keyring - export keyring from a #gnutls_certificate_credentials_t
* @sc: is a #gnutls_certificate_credentials_t structure.
* @keyring: the exported keyring. Should be treated as constant
*
* This function will export the OpenPGP keyring associated with the
* given credentials.
*
* Since: 2.4.0
**/
void
gnutls_certificate_get_openpgp_keyring (gnutls_certificate_credentials_t sc,
gnutls_openpgp_keyring_t * keyring)
{
*keyring = sc->keyring;
}
#endif
/**
* gnutls_certificate_free_ca_names - Used to free all the CA names from a gnutls_certificate_credentials_t structure
* @sc: is a #gnutls_certificate_credentials_t structure.
*
* This function will delete all the CA name in the
* given credentials. Clients may call this to save some memory
* since in client side the CA names are not used.
*
* CA names are used by servers to advertize the CAs they
* support to clients.
*
**/
void
gnutls_certificate_free_ca_names (gnutls_certificate_credentials_t sc)
{
_gnutls_free_datum (&sc->x509_rdn_sequence);
}
/*-
* _gnutls_certificate_get_rsa_params - Returns the RSA parameters pointer
* @rsa_params: holds the RSA parameters or NULL.
* @func: function to retrieve the parameters or NULL.
* @session: The session.
*
* This function will return the rsa parameters pointer.
*
-*/
gnutls_rsa_params_t
_gnutls_certificate_get_rsa_params (gnutls_rsa_params_t rsa_params,
gnutls_params_function * func,
gnutls_session_t session)
{
gnutls_params_st params;
int ret;
if (session->internals.params.rsa_params)
{
return session->internals.params.rsa_params;
}
if (rsa_params)
{
session->internals.params.rsa_params = rsa_params;
}
else if (func)
{
ret = func (session, GNUTLS_PARAMS_RSA_EXPORT, ¶ms);
if (ret == 0 && params.type == GNUTLS_PARAMS_RSA_EXPORT)
{
session->internals.params.rsa_params = params.params.rsa_export;
session->internals.params.free_rsa_params = params.deinit;
}
}
return session->internals.params.rsa_params;
}
/**
* gnutls_certificate_free_credentials - Used to free an allocated gnutls_certificate_credentials_t structure
* @sc: is a #gnutls_certificate_credentials_t structure.
*
* This structure is complex enough to manipulate directly thus
* this helper function is provided in order to free (deallocate) it.
*
* This function does not free any temporary parameters associated
* with this structure (ie RSA and DH parameters are not freed by
* this function).
**/
void
gnutls_certificate_free_credentials (gnutls_certificate_credentials_t sc)
{
gnutls_certificate_free_keys (sc);
gnutls_certificate_free_cas (sc);
gnutls_certificate_free_ca_names (sc);
#ifdef ENABLE_PKI
gnutls_certificate_free_crls (sc);
#endif
#ifdef ENABLE_OPENPGP
gnutls_openpgp_keyring_deinit (sc->keyring);
#endif
gnutls_free (sc);
}
/**
* gnutls_certificate_allocate_credentials - Used to allocate a gnutls_certificate_credentials_t structure
* @res: is a pointer to a #gnutls_certificate_credentials_t structure.
*
* This structure is complex enough to manipulate directly thus this
* helper function is provided in order to allocate it.
*
* Returns: %GNUTLS_E_SUCCESS on success, or an error code.
**/
int
gnutls_certificate_allocate_credentials (gnutls_certificate_credentials_t *
res)
{
*res = gnutls_calloc (1, sizeof (certificate_credentials_st));
if (*res == NULL)
return GNUTLS_E_MEMORY_ERROR;
(*res)->verify_bits = DEFAULT_VERIFY_BITS;
(*res)->verify_depth = DEFAULT_VERIFY_DEPTH;
return 0;
}
/* returns the KX algorithms that are supported by a
* certificate. (Eg a certificate with RSA params, supports
* GNUTLS_KX_RSA algorithm).
* This function also uses the KeyUsage field of the certificate
* extensions in order to disable unneded algorithms.
*/
int
_gnutls_selected_cert_supported_kx (gnutls_session_t session,
gnutls_kx_algorithm_t ** alg,
int *alg_size)
{
gnutls_kx_algorithm_t kx;
gnutls_pk_algorithm_t pk;
gnutls_kx_algorithm_t kxlist[MAX_ALGOS];
gnutls_cert *cert;
int i;
if (session->internals.selected_cert_list_length == 0)
{
*alg_size = 0;
*alg = NULL;
return 0;
}
cert = &session->internals.selected_cert_list[0];
i = 0;
for (kx = 0; kx < MAX_ALGOS; kx++)
{
pk = _gnutls_map_pk_get_pk (kx);
if (pk == cert->subject_pk_algorithm)
{
/* then check key usage */
if (_gnutls_check_key_usage (cert, kx) == 0)
{
kxlist[i] = kx;
i++;
}
}
}
if (i == 0)
{
gnutls_assert ();
return GNUTLS_E_INVALID_REQUEST;
}
*alg = gnutls_calloc (i, sizeof (gnutls_kx_algorithm_t));
if (*alg == NULL)
return GNUTLS_E_MEMORY_ERROR;
*alg_size = i;
memcpy (*alg, kxlist, i * sizeof (gnutls_kx_algorithm_t));
return 0;
}
/**
* gnutls_certificate_server_set_request - Used to set whether to request a client certificate
* @session: is a #gnutls_session_t structure.
* @req: is one of GNUTLS_CERT_REQUEST, GNUTLS_CERT_REQUIRE
*
* This function specifies if we (in case of a server) are going
* to send a certificate request message to the client. If @req
* is GNUTLS_CERT_REQUIRE then the server will return an error if
* the peer does not provide a certificate. If you do not
* call this function then the client will not be asked to
* send a certificate.
**/
void
gnutls_certificate_server_set_request (gnutls_session_t session,
gnutls_certificate_request_t req)
{
session->internals.send_cert_req = req;
}
/**
* gnutls_certificate_client_set_retrieve_function - Used to set a callback to retrieve the certificate
* @cred: is a #gnutls_certificate_credentials_t structure.
* @func: is the callback function
*
* This function sets a callback to be called in order to retrieve the certificate
* to be used in the handshake.
* The callback's function prototype is:
* int (*callback)(gnutls_session_t, const gnutls_datum_t* req_ca_dn, int nreqs,
* const gnutls_pk_algorithm_t* pk_algos, int pk_algos_length, gnutls_retr_st* st);
*
* @req_ca_cert is only used in X.509 certificates.
* Contains a list with the CA names that the server considers trusted.
* Normally we should send a certificate that is signed
* by one of these CAs. These names are DER encoded. To get a more
* meaningful value use the function gnutls_x509_rdn_get().
*
* @pk_algos contains a list with server's acceptable signature algorithms.
* The certificate returned should support the server's given algorithms.
*
* @st should contain the certificates and private keys.
*
* If the callback function is provided then gnutls will call it, in the
* handshake, after the certificate request message has been received.
*
* The callback function should set the certificate list to be sent, and
* return 0 on success. If no certificate was selected then the number of certificates
* should be set to zero. The value (-1) indicates error and the handshake
* will be terminated.
**/
void gnutls_certificate_client_set_retrieve_function
(gnutls_certificate_credentials_t cred,
gnutls_certificate_client_retrieve_function * func)
{
cred->client_get_cert_callback = func;
}
/**
* gnutls_certificate_server_set_retrieve_function - Used to set a callback to retrieve the certificate
* @cred: is a #gnutls_certificate_credentials_t structure.
* @func: is the callback function
*
* This function sets a callback to be called in order to retrieve the certificate
* to be used in the handshake.
* The callback's function prototype is:
* int (*callback)(gnutls_session_t, gnutls_retr_st* st);
*
* @st should contain the certificates and private keys.
*
* If the callback function is provided then gnutls will call it, in the
* handshake, after the certificate request message has been received.
*
* The callback function should set the certificate list to be sent, and
* return 0 on success. The value (-1) indicates error and the handshake
* will be terminated.
**/
void gnutls_certificate_server_set_retrieve_function
(gnutls_certificate_credentials_t cred,
gnutls_certificate_server_retrieve_function * func)
{
cred->server_get_cert_callback = func;
}
/*-
* _gnutls_x509_extract_certificate_activation_time - return the peer's certificate activation time
* @cert: should contain an X.509 DER encoded certificate
*
* This function will return the certificate's activation time in UNIX time
* (ie seconds since 00:00:00 UTC January 1, 1970).
*
* Returns a (time_t) -1 in case of an error.
*
-*/
static time_t
_gnutls_x509_get_raw_crt_activation_time (const gnutls_datum_t * cert)
{
gnutls_x509_crt_t xcert;
time_t result;
result = gnutls_x509_crt_init (&xcert);
if (result < 0)
return (time_t) - 1;
result = gnutls_x509_crt_import (xcert, cert, GNUTLS_X509_FMT_DER);
if (result < 0)
{
gnutls_x509_crt_deinit (xcert);
return (time_t) - 1;
}
result = gnutls_x509_crt_get_activation_time (xcert);
gnutls_x509_crt_deinit (xcert);
return result;
}
/*-
* gnutls_x509_extract_certificate_expiration_time - return the certificate's expiration time
* @cert: should contain an X.509 DER encoded certificate
*
* This function will return the certificate's expiration time in UNIX
* time (ie seconds since 00:00:00 UTC January 1, 1970). Returns a
*
* (time_t) -1 in case of an error.
*
-*/
static time_t
_gnutls_x509_get_raw_crt_expiration_time (const gnutls_datum_t * cert)
{
gnutls_x509_crt_t xcert;
time_t result;
result = gnutls_x509_crt_init (&xcert);
if (result < 0)
return (time_t) - 1;
result = gnutls_x509_crt_import (xcert, cert, GNUTLS_X509_FMT_DER);
if (result < 0)
{
gnutls_x509_crt_deinit (xcert);
return (time_t) - 1;
}
result = gnutls_x509_crt_get_expiration_time (xcert);
gnutls_x509_crt_deinit (xcert);
return result;
}
#ifdef ENABLE_OPENPGP
/*-
* _gnutls_openpgp_crt_verify_peers - return the peer's certificate status
* @session: is a gnutls session
*
* This function will try to verify the peer's certificate and return its status (TRUSTED, INVALID etc.).
* Returns a negative error code in case of an error, or GNUTLS_E_NO_CERTIFICATE_FOUND if no certificate was sent.
*
-*/
static int
_gnutls_openpgp_crt_verify_peers (gnutls_session_t session,
unsigned int *status)
{
cert_auth_info_t info;
gnutls_certificate_credentials_t cred;
int peer_certificate_list_size, ret;
CHECK_AUTH (GNUTLS_CRD_CERTIFICATE, GNUTLS_E_INVALID_REQUEST);
info = _gnutls_get_auth_info (session);
if (info == NULL)
return GNUTLS_E_INVALID_REQUEST;
cred = (gnutls_certificate_credentials_t)
_gnutls_get_cred (session->key, GNUTLS_CRD_CERTIFICATE, NULL);
if (cred == NULL)
{
gnutls_assert ();
return GNUTLS_E_INSUFFICIENT_CREDENTIALS;
}
if (info->raw_certificate_list == NULL || info->ncerts == 0)
{
gnutls_assert ();
return GNUTLS_E_NO_CERTIFICATE_FOUND;
}
/* generate a list of gnutls_certs based on the auth info
* raw certs.
*/
peer_certificate_list_size = info->ncerts;
if (peer_certificate_list_size != 1)
{
gnutls_assert ();
return GNUTLS_E_INTERNAL_ERROR;
}
/* Verify certificate
*/
ret =
_gnutls_openpgp_verify_key (cred, &info->raw_certificate_list[0],
peer_certificate_list_size, status);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return 0;
}
#endif
/**
* gnutls_certificate_verify_peers2 - return the peer's certificate verification status
* @session: is a gnutls session
* @status: is the output of the verification
*
* This function will try to verify the peer's certificate and return
* its status (trusted, invalid etc.). The value of @status should
* be one or more of the gnutls_certificate_status_t enumerated
* elements bitwise or'd. To avoid denial of service attacks some
* default upper limits regarding the certificate key size and chain
* size are set. To override them use
* gnutls_certificate_set_verify_limits().
*
* Note that you must also check the peer's name in order to check if
* the verified certificate belongs to the actual peer.
*
* This function uses gnutls_x509_crt_list_verify() with the CAs in
* the credentials as trusted CAs.
*
* Note that some commonly used X.509 Certificate Authorities are
* still using Version 1 certificates. If you want to accept them,
* you need to call gnutls_certificate_set_verify_flags() with, e.g.,
* %GNUTLS_VERIFY_ALLOW_X509_V1_CA_CRT parameter.
*
* Returns: a negative error code on error and zero on success.
**/
int
gnutls_certificate_verify_peers2 (gnutls_session_t session,
unsigned int *status)
{
cert_auth_info_t info;
CHECK_AUTH (GNUTLS_CRD_CERTIFICATE, GNUTLS_E_INVALID_REQUEST);
info = _gnutls_get_auth_info (session);
if (info == NULL)
{
return GNUTLS_E_NO_CERTIFICATE_FOUND;
}
if (info->raw_certificate_list == NULL || info->ncerts == 0)
return GNUTLS_E_NO_CERTIFICATE_FOUND;
switch (gnutls_certificate_type_get (session))
{
case GNUTLS_CRT_X509:
return _gnutls_x509_cert_verify_peers (session, status);
#ifdef ENABLE_OPENPGP
case GNUTLS_CRT_OPENPGP:
return _gnutls_openpgp_crt_verify_peers (session, status);
#endif
default:
return GNUTLS_E_INVALID_REQUEST;
}
}
/**
* gnutls_certificate_verify_peers - return the peer's certificate verification status
* @session: is a gnutls session
*
* This function will try to verify the peer's certificate and return
* its status (trusted, invalid etc.). However you must also check
* the peer's name in order to check if the verified certificate
* belongs to the actual peer.
*
* This function uses gnutls_x509_crt_list_verify().
*
* Returns: one or more of the #gnutls_certificate_status_t
* enumerated elements bitwise or'd, or a negative value on error.
*
* Deprecated: Use gnutls_certificate_verify_peers2() instead.
**/
int
gnutls_certificate_verify_peers (gnutls_session_t session)
{
unsigned int status;
int ret;
ret = gnutls_certificate_verify_peers2 (session, &status);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
return status;
}
/**
* gnutls_certificate_expiration_time_peers - return the peer's certificate expiration time
* @session: is a gnutls session
*
* This function will return the peer's certificate expiration time.
*
* Returns: (time_t)-1 on error.
*
* Deprecated: gnutls_certificate_verify_peers2() now verifies expiration times.
**/
time_t
gnutls_certificate_expiration_time_peers (gnutls_session_t session)
{
cert_auth_info_t info;
CHECK_AUTH (GNUTLS_CRD_CERTIFICATE, GNUTLS_E_INVALID_REQUEST);
info = _gnutls_get_auth_info (session);
if (info == NULL)
{
return (time_t) - 1;
}
if (info->raw_certificate_list == NULL || info->ncerts == 0)
{
gnutls_assert ();
return (time_t) - 1;
}
switch (gnutls_certificate_type_get (session))
{
case GNUTLS_CRT_X509:
return
_gnutls_x509_get_raw_crt_expiration_time (&info->raw_certificate_list
[0]);
#ifdef ENABLE_OPENPGP
case GNUTLS_CRT_OPENPGP:
return
_gnutls_openpgp_get_raw_key_expiration_time
(&info->raw_certificate_list[0]);
#endif
default:
return (time_t) - 1;
}
}
/**
* gnutls_certificate_activation_time_peers - return the peer's certificate activation time
* @session: is a gnutls session
*
* This function will return the peer's certificate activation time.
* This is the creation time for openpgp keys.
*
* Returns: (time_t)-1 on error.
*
* Deprecated: gnutls_certificate_verify_peers2() now verifies activation times.
**/
time_t
gnutls_certificate_activation_time_peers (gnutls_session_t session)
{
cert_auth_info_t info;
CHECK_AUTH (GNUTLS_CRD_CERTIFICATE, GNUTLS_E_INVALID_REQUEST);
info = _gnutls_get_auth_info (session);
if (info == NULL)
{
return (time_t) - 1;
}
if (info->raw_certificate_list == NULL || info->ncerts == 0)
{
gnutls_assert ();
return (time_t) - 1;
}
switch (gnutls_certificate_type_get (session))
{
case GNUTLS_CRT_X509:
return
_gnutls_x509_get_raw_crt_activation_time (&info->raw_certificate_list
[0]);
#ifdef ENABLE_OPENPGP
case GNUTLS_CRT_OPENPGP:
return
_gnutls_openpgp_get_raw_key_creation_time (&info->raw_certificate_list
[0]);
#endif
default:
return (time_t) - 1;
}
}
/* Converts the first certificate for the cert_auth_info structure
* to a gcert.
*/
int
_gnutls_get_auth_info_gcert (gnutls_cert * gcert,
gnutls_certificate_type_t type,
cert_auth_info_t info,
int flags /* OR of ConvFlags */ )
{
switch (type)
{
case GNUTLS_CRT_X509:
return _gnutls_x509_raw_cert_to_gcert (gcert,
&info->raw_certificate_list[0],
flags);
#ifdef ENABLE_OPENPGP
case GNUTLS_CRT_OPENPGP:
return _gnutls_openpgp_raw_crt_to_gcert (gcert,
&info->raw_certificate_list[0],
info->
use_subkey ? info->subkey_id :
NULL);
#endif
default:
gnutls_assert ();
return GNUTLS_E_INTERNAL_ERROR;
}
}
/* This function will convert a der certificate to a format
* (structure) that gnutls can understand and use. Actually the
* important thing on this function is that it extracts the
* certificate's (public key) parameters.
*
* The noext flag is used to complete the handshake even if the
* extensions found in the certificate are unsupported and critical.
* The critical extensions will be catched by the verification functions.
*/
int
_gnutls_x509_raw_cert_to_gcert (gnutls_cert * gcert,
const gnutls_datum_t * derCert,
int flags /* OR of ConvFlags */ )
{
int ret;
gnutls_x509_crt_t cert;
ret = gnutls_x509_crt_init (&cert);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
ret = gnutls_x509_crt_import (cert, derCert, GNUTLS_X509_FMT_DER);
if (ret < 0)
{
gnutls_assert ();
gnutls_x509_crt_deinit (cert);
return ret;
}
ret = _gnutls_x509_crt_to_gcert (gcert, cert, flags);
gnutls_x509_crt_deinit (cert);
return ret;
}
/* Like above but it accepts a parsed certificate instead.
*/
int
_gnutls_x509_crt_to_gcert (gnutls_cert * gcert,
gnutls_x509_crt_t cert, unsigned int flags)
{
int ret = 0;
memset (gcert, 0, sizeof (gnutls_cert));
gcert->cert_type = GNUTLS_CRT_X509;
gcert->sign_algo = gnutls_x509_crt_get_signature_algorithm (cert);
if (!(flags & CERT_NO_COPY))
{
#define SMALL_DER 512
opaque *der;
size_t der_size = SMALL_DER;
/* initially allocate a bogus size, just in case the certificate
* fits in it. That way we minimize the DER encodings performed.
*/
der = gnutls_malloc (SMALL_DER);
if (der == NULL)
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
ret =
gnutls_x509_crt_export (cert, GNUTLS_X509_FMT_DER, der, &der_size);
if (ret < 0 && ret != GNUTLS_E_SHORT_MEMORY_BUFFER)
{
gnutls_assert ();
gnutls_free (der);
return ret;
}
if (ret == GNUTLS_E_SHORT_MEMORY_BUFFER)
{
der = gnutls_realloc (der, der_size);
if (der == NULL)
{
gnutls_assert ();
return GNUTLS_E_MEMORY_ERROR;
}
ret =
gnutls_x509_crt_export (cert, GNUTLS_X509_FMT_DER, der,
&der_size);
if (ret < 0)
{
gnutls_assert ();
gnutls_free (der);
return ret;
}
}
gcert->raw.data = der;
gcert->raw.size = der_size;
}
else
/* now we have 0 or a bitwise or of things to decode */
flags ^= CERT_NO_COPY;
if (flags & CERT_ONLY_EXTENSIONS || flags == 0)
{
ret = gnutls_x509_crt_get_key_usage (cert, &gcert->key_usage, NULL);
if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
gcert->key_usage = 0;
else if (ret < 0)
{
gnutls_assert ();
return ret;
}
gcert->version = gnutls_x509_crt_get_version (cert);
}
gcert->subject_pk_algorithm = gnutls_x509_crt_get_pk_algorithm (cert, NULL);
if (flags & CERT_ONLY_PUBKEY || flags == 0)
{
gcert->params_size = MAX_PUBLIC_PARAMS_SIZE;
ret =
_gnutls_x509_crt_get_mpis (cert, gcert->params, &gcert->params_size);
if (ret < 0)
{
gnutls_assert ();
return ret;
}
}
return 0;
}
void
_gnutls_gcert_deinit (gnutls_cert * cert)
{
int i;
if (cert == NULL)
return;
for (i = 0; i < cert->params_size; i++)
{
_gnutls_mpi_release (&cert->params[i]);
}
_gnutls_free_datum (&cert->raw);
}
/**
* gnutls_sign_callback_set:
* @session: is a gnutls session
* @sign_func: function pointer to application's sign callback.
* @userdata: void pointer that will be passed to sign callback.
*
* Set the callback function. The function must have this prototype:
*
* typedef int (*gnutls_sign_func) (gnutls_session_t session,
* void *userdata,
* gnutls_certificate_type_t cert_type,
* const gnutls_datum_t * cert,
* const gnutls_datum_t * hash,
* gnutls_datum_t * signature);
*
* The @userdata parameter is passed to the @sign_func verbatim, and
* can be used to store application-specific data needed in the
* callback function. See also gnutls_sign_callback_get().
**/
void
gnutls_sign_callback_set (gnutls_session_t session,
gnutls_sign_func sign_func, void *userdata)
{
session->internals.sign_func = sign_func;
session->internals.sign_func_userdata = userdata;
}
/**
* gnutls_sign_callback_get:
* @session: is a gnutls session
* @userdata: if non-%NULL, will be set to abstract callback pointer.
*
* Retrieve the callback function, and its userdata pointer.
*
* Returns: The function pointer set by gnutls_sign_callback_set(), or
* if not set, %NULL.
**/
gnutls_sign_func
gnutls_sign_callback_get (gnutls_session_t session, void **userdata)
{
if (userdata)
*userdata = session->internals.sign_func_userdata;
return session->internals.sign_func;
}
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