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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2025 Free Software Foundation, Inc.
GNU Mailutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Mailutils 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#include "pop3d.h"
struct mu_auth_data *auth_data;
int
pop3d_begin_session ()
{
mu_url_t url = NULL;
size_t total = 0;
mu_diag_output (MU_DIAG_INFO, _("POP3 login: user `%s', source %s"),
auth_data->name, auth_data->source);
if (check_login_delay (auth_data->name))
{
mu_diag_output (MU_DIAG_INFO,
_("user `%s' tried to log in within the minimum allowed delay"),
auth_data->name);
state = AUTHORIZATION;
mu_auth_data_destroy (&auth_data);
return ERR_LOGIN_DELAY;
}
if (auth_data->change_uid)
setuid (auth_data->uid);
if (manlock_open_mailbox (&mbox, auth_data->mailbox, 0,
MU_STREAM_CREAT | MU_STREAM_RDWR))
{
mu_auth_data_destroy (&auth_data);
state = AUTHORIZATION;
return ERR_MBOX_LOCK;
}
username = mu_strdup (auth_data->name);
state = TRANSACTION;
pop3d_outf ("+OK opened mailbox for %s\n", username);
if (undelete_on_startup)
pop3d_undelete_all ();
deliver_pending_bulletins ();
/* log mailbox stats */
mu_mailbox_get_url (mbox, &url);
mu_mailbox_messages_count (mbox, &total);
mu_diag_output (MU_DIAG_INFO,
ngettext ("user `%s' logged in with mailbox `%s' (%s message)",
"user `%s' logged in with mailbox `%s' (%s messages)",
(unsigned long) total),
username, mu_url_to_string (url), mu_umaxtostr (0, total));
return OK;
}
int
pop3d_user (char *arg, struct pop3d_session *sess)
{
char *buf, *pass, *cmd;
char buffer[512];
int xscript_level;
if (state != AUTHORIZATION)
return ERR_WRONG_STATE;
if ((strlen (arg) == 0) || (strchr (arg, ' ') != NULL))
return ERR_BAD_ARGS;
pop3d_outf ("+OK\n");
pop3d_flush_output ();
xscript_level = set_xscript_level (MU_XSCRIPT_SECURE);
buf = pop3d_readline (buffer, sizeof (buffer));
pop3d_parse_command (buf, &cmd, &pass);
set_xscript_level (xscript_level);
if (mu_c_strcasecmp (cmd, "PASS") == 0)
{
int rc;
#ifdef _USE_APOP
/* Check to see if they have an APOP password. If so, refuse USER/PASS */
tmp = pop3d_apopuser (arg);
if (tmp != NULL)
{
mu_diag_output (MU_DIAG_INFO,
_("APOP user %s tried to log in with USER"), arg);
return ERR_BAD_LOGIN;
}
#endif
rc = mu_get_auth (&auth_data, mu_auth_key_name, arg);
switch (rc)
{
case 0:
break;
case MU_ERR_AUTH_FAILURE:
case MU_ERR_NOENT:
mu_diag_output (MU_DIAG_INFO, _("user `%s' nonexistent"), arg);
return ERR_BAD_LOGIN;
default:
mu_error (_("error getting identity info for user `%s': %s"),
arg, mu_strerror (rc));
return ERR_SYS_LOGIN;
}
rc = mu_authenticate (auth_data, pass);
openlog (MU_LOG_TAG (), LOG_PID, mu_log_facility);
switch (rc)
{
case 0:
break;
case MU_ERR_AUTH_FAILURE:
mu_diag_output (MU_DIAG_INFO,
_("user `%s': authentication failed"), arg);
mu_auth_data_destroy (&auth_data);
return ERR_BAD_LOGIN;
default:
mu_error (_("error authenticating user `%s': %s"),
arg, mu_strerror (rc));
return ERR_SYS_LOGIN;
}
}
else if (mu_c_strcasecmp (cmd, "QUIT") == 0)
{
mu_diag_output (MU_DIAG_INFO, _("possible probe of account `%s'"), arg);
return pop3d_quit (pass, sess);
}
else
{
return ERR_BAD_CMD;
}
return pop3d_begin_session ();
}
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