mech-login.c revision 462b8c71015b2483cff3c59fa3668246dc72dfce
/*
* LOGIN authentication mechanism.
*
* Copyright (c) 2004 Andrey Panin <pazke@donpac.ru>
*
* This software is released under the MIT license.
*/
#include "common.h"
#include "mech.h"
#include "passdb.h"
#include "safe-memset.h"
#include "plain-common.h"
static void
mech_login_auth_continue(struct auth_request *request,
const unsigned char *data, size_t data_size)
{
static const char prompt2[] = "Password:";
const char *username, *error;
if (request->user == NULL) {
username = t_strndup(data, data_size);
if (!auth_request_set_username(request, username, &error)) {
auth_request_log_info(request, "login", "%s", error);
auth_request_fail(request);
return;
}
request->callback(request, AUTH_CLIENT_RESULT_CONTINUE,
prompt2, strlen(prompt2));
} else {
char *pass = p_strndup(unsafe_data_stack_pool, data, data_size);
auth_request_verify_plain(request, pass, plain_verify_callback);
safe_memset(pass, 0, strlen(pass));
}
}
static void
mech_login_auth_initial(struct auth_request *request,
const unsigned char *data, size_t data_size)
{
static const char prompt1[] = "Username:";
if (data_size == 0) {
request->callback(request, AUTH_CLIENT_RESULT_CONTINUE,
prompt1, strlen(prompt1));
} else {
mech_login_auth_continue(request, data, data_size);
}
}
static struct auth_request *mech_login_auth_new(void)
{
struct auth_request *request;
pool_t pool;
pool = pool_alloconly_create("login_auth_request", 1024);
request = p_new(pool, struct auth_request, 1);
request->pool = pool;
return request;
}
const struct mech_module mech_login = {
"LOGIN",
MEMBER(flags) MECH_SEC_PLAINTEXT,
MEMBER(passdb_need_plain) TRUE,
MEMBER(passdb_need_credentials) FALSE,
MEMBER(passdb_need_set_credentials) FALSE,
mech_login_auth_new,
mech_login_auth_initial,
mech_login_auth_continue,
mech_generic_auth_free
};