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/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
#include "auth-common.h"
#include "passdb.h"
#ifdef PASSDB_PASSWD_FILE
#include "str.h"
#include "auth-cache.h"
#include "password-scheme.h"
#include "db-passwd-file.h"
struct passwd_file_passdb_module {
struct passdb_module module;
struct db_passwd_file *pwf;
const char *username_format;
};
static int
passwd_file_add_extra_fields(struct auth_request *request, char *const *fields)
{
string_t *str = t_str_new(512);
const struct var_expand_table *table;
const char *key, *value, *error;
unsigned int i;
table = auth_request_get_var_expand_table(request, NULL);
for (i = 0; fields[i] != NULL; i++) {
value = strchr(fields[i], '=');
if (value != NULL) {
key = t_strdup_until(fields[i], value);
str_truncate(str, 0);
if (auth_request_var_expand_with_table(str, value + 1,
request, table, NULL, &error) <= 0) {
e_error(authdb_event(request),
"Failed to expand extra field %s: %s",
fields[i], error);
return -1;
}
value = str_c(str);
} else {
key = fields[i];
value = "";
}
auth_request_set_field(request, key, value, NULL);
}
return 0;
}
static int passwd_file_save_results(struct auth_request *request,
const struct passwd_user *pu,
const char **crypted_pass_r,
const char **scheme_r)
{
*crypted_pass_r = pu->password != NULL ? pu->password : "";
*scheme_r = password_get_scheme(crypted_pass_r);
if (*scheme_r == NULL)
*scheme_r = request->passdb->passdb->default_pass_scheme;
/* save the password so cache can use it */
auth_request_set_field(request, "password",
*crypted_pass_r, *scheme_r);
if (pu->extra_fields != NULL) {
if (passwd_file_add_extra_fields(request, pu->extra_fields) < 0)
return -1;
}
return 0;
}
static void
passwd_file_verify_plain(struct auth_request *request, const char *password,
verify_plain_callback_t *callback)
{
struct passdb_module *_module = request->passdb->passdb;
struct passwd_file_passdb_module *module =
(struct passwd_file_passdb_module *)_module;
struct passwd_user *pu;
const char *scheme, *crypted_pass;
int ret;
ret = db_passwd_file_lookup(module->pwf, request,
module->username_format, &pu);
if (ret <= 0) {
callback(ret < 0 ? PASSDB_RESULT_INTERNAL_FAILURE :
PASSDB_RESULT_USER_UNKNOWN, request);
return;
}
if (passwd_file_save_results(request, pu, &crypted_pass, &scheme) < 0) {
callback(PASSDB_RESULT_INTERNAL_FAILURE, request);
return;
}
ret = auth_request_password_verify(request, password, crypted_pass,
scheme, AUTH_SUBSYS_DB);
callback(ret > 0 ? PASSDB_RESULT_OK : PASSDB_RESULT_PASSWORD_MISMATCH,
request);
}
static void
passwd_file_lookup_credentials(struct auth_request *request,
lookup_credentials_callback_t *callback)
{
struct passdb_module *_module = request->passdb->passdb;
struct passwd_file_passdb_module *module =
(struct passwd_file_passdb_module *)_module;
struct passwd_user *pu;
const char *crypted_pass, *scheme;
int ret;
ret = db_passwd_file_lookup(module->pwf, request,
module->username_format, &pu);
if (ret <= 0) {
callback(ret < 0 ? PASSDB_RESULT_INTERNAL_FAILURE :
PASSDB_RESULT_USER_UNKNOWN, NULL, 0, request);
return;
}
if (passwd_file_save_results(request, pu, &crypted_pass, &scheme) < 0) {
callback(PASSDB_RESULT_INTERNAL_FAILURE, NULL, 0, request);
return;
}
passdb_handle_credentials(PASSDB_RESULT_OK, crypted_pass, scheme,
callback, request);
}
static struct passdb_module *
passwd_file_preinit(pool_t pool, const char *args)
{
struct passwd_file_passdb_module *module;
const char *scheme = PASSWD_FILE_DEFAULT_SCHEME;
const char *format = PASSWD_FILE_DEFAULT_USERNAME_FORMAT;
const char *key, *value;
while (*args != '\0') {
if (*args == '/')
break;
key = args;
value = strchr(key, '=');
if (value == NULL) {
value = "";
args = strchr(key, ' ');
} else {
key = t_strdup_until(key, value);
args = strchr(++value, ' ');
if (args != NULL)
value = t_strdup_until(value, args);
}
if (args == NULL)
args = "";
else
args++;
if (strcmp(key, "scheme") == 0)
scheme = p_strdup(pool, value);
else if (strcmp(key, "username_format") == 0)
format = p_strdup(pool, value);
else
i_fatal("passdb passwd-file: Unknown setting: %s", key);
}
if (*args == '\0')
i_fatal("passdb passwd-file: Missing args");
module = p_new(pool, struct passwd_file_passdb_module, 1);
module->pwf = db_passwd_file_init(args, FALSE,
global_auth_settings->debug);
module->username_format = format;
module->module.default_pass_scheme = scheme;
return &module->module;
}
static void passwd_file_init(struct passdb_module *_module)
{
struct passwd_file_passdb_module *module =
(struct passwd_file_passdb_module *)_module;
db_passwd_file_parse(module->pwf);
}
static void passwd_file_deinit(struct passdb_module *_module)
{
struct passwd_file_passdb_module *module =
(struct passwd_file_passdb_module *)_module;
db_passwd_file_unref(&module->pwf);
}
struct passdb_module_interface passdb_passwd_file = {
"passwd-file",
passwd_file_preinit,
passwd_file_init,
passwd_file_deinit,
passwd_file_verify_plain,
passwd_file_lookup_credentials,
NULL
};
#else
struct passdb_module_interface passdb_passwd_file = {
.name = "passwd-file"
};
#endif
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