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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2003-2025 Free Software Foundation, Inc.
This 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 3 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, see
<http://www.gnu.org/licenses/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <mailutils/tls.h>
#include <mailutils/nls.h>
#include <mailutils/error.h>
#include <mailutils/errno.h>
#include <mailutils/mu_auth.h>
struct safety_check_closure
{
int defval;
int *data;
};
static int
cb_safety_checks (const char *name, void *data)
{
struct safety_check_closure *cp = data;
if (mu_file_safety_compose (cp->data, name, cp->defval))
mu_error (_("unknown keyword: %s"), name);
return 0;
}
static int
cb_cert_safety_checks (void *data, mu_config_value_t *arg)
{
struct safety_check_closure clos;
clos.defval = MU_TLS_CERT_FILE_CHECKS;
clos.data = data;
return mu_cfg_string_value_cb (arg, cb_safety_checks, &clos);
}
static int
cb_key_safety_checks (void *data, mu_config_value_t *arg)
{
struct safety_check_closure clos;
clos.defval = MU_TLS_KEY_FILE_CHECKS;
clos.data = data;
return mu_cfg_string_value_cb (arg, cb_safety_checks, &clos);
}
static int
cb_ca_safety_checks (void *data, mu_config_value_t *arg)
{
struct safety_check_closure clos;
clos.defval = MU_TLS_CA_FILE_CHECKS;
clos.data = data;
return mu_cfg_string_value_cb (arg, cb_safety_checks, &clos);
}
static struct mu_cfg_param mu_tls_global_param[] = {
{ "key-file", mu_cfg_callback,
&mu_tls_key_file_checks, 0,
cb_key_safety_checks,
N_("Configure safety checks for SSL key file. Argument is a list or "
"sequence of check names optionally prefixed with '+' to enable or "
"'-' to disable the corresponding check. Valid check names are:\n"
"\n"
" none disable all checks\n"
" all enable all checks\n"
" gwrfil forbid group writable files\n"
" awrfil forbid world writable files\n"
" grdfil forbid group readable files\n"
" ardfil forbid world writable files\n"
" linkwrdir forbid symbolic links in group or world writable directories\n"
" gwrdir forbid files in group writable directories\n"
" awrdir forbid files in world writable directories\n"),
N_("arg: list") },
{ "cert-file", mu_cfg_callback,
&mu_tls_cert_file_checks, 0,
cb_cert_safety_checks,
N_("Configure safety checks for SSL certificate. See above for a description of <arg>."),
N_("arg: list") },
{ "ca-file", mu_cfg_callback,
&mu_tls_ca_file_checks, 0,
cb_ca_safety_checks,
N_("Configure safety checks for SSL certificate authority file. See above for a description of <arg>."),
N_("arg: list") },
{ NULL }
};
static struct mu_cfg_param tls_canned_param[] = {
{ "ssl-certificate-file", mu_c_string,
NULL, mu_offsetof(struct mu_tls_config, cert_file), NULL,
N_("Specify SSL certificate file."),
N_("file") },
{ "ssl-key-file", mu_c_string,
NULL, mu_offsetof(struct mu_tls_config, key_file), NULL,
N_("Specify SSL certificate key file."),
N_("file") },
{ "ssl-ca-file", mu_c_string,
NULL, mu_offsetof(struct mu_tls_config, ca_file), NULL,
N_("Specify trusted CAs file."),
N_("file") },
{ "ssl-priorities", mu_c_string,
NULL, mu_offsetof(struct mu_tls_config, priorities), NULL,
N_("Set the priorities to use on the ciphers, key exchange methods, "
"macs and compression methods."),
NULL },
{ "handshake-timeout", mu_c_uint,
NULL, mu_offsetof(struct mu_tls_config, handshake_timeout), NULL,
N_("Timeout for handshake I/O operations (seconds)"),
"n" },
{ NULL }
};
void
mu_tls_cfg_init (void)
{
struct mu_cfg_section *section;
if (mu_create_canned_section ("tls", §ion))
abort ();
section->docstring = N_("Configure TLS");
section->label = NULL;
mu_cfg_section_add_params (section, tls_canned_param);
}
struct mu_auth_module mu_auth_tls_module = {
.name = "tls-file-checks",
.cfg = mu_tls_global_param,
};
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