393 lines
8.9 KiB
C
393 lines
8.9 KiB
C
/*-
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* Copyright (c) 2002-2003 Networks Associates Technology, Inc.
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* Copyright (c) 2004-2015 Dag-Erling Smørgrav
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* Network Associates Laboratories, the Security Research Division of
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* Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $OpenPAM: openpam.h 938 2017-04-30 21:34:42Z des $
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*/
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#ifndef SECURITY_OPENPAM_H_INCLUDED
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#define SECURITY_OPENPAM_H_INCLUDED
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/*
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* Annoying but necessary header pollution
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*/
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#include <stdarg.h>
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#include <security/openpam_attr.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct passwd;
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/*
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* API extensions
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*/
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int
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openpam_borrow_cred(pam_handle_t *_pamh,
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const struct passwd *_pwd)
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OPENPAM_NONNULL((1,2));
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int
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openpam_subst(const pam_handle_t *_pamh,
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char *_buf,
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size_t *_bufsize,
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const char *_template);
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void
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openpam_free_data(pam_handle_t *_pamh,
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void *_data,
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int _status);
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void
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openpam_free_envlist(char **_envlist);
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const char *
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openpam_get_option(pam_handle_t *_pamh,
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const char *_option);
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int
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openpam_restore_cred(pam_handle_t *_pamh)
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OPENPAM_NONNULL((1));
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int
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openpam_set_option(pam_handle_t *_pamh,
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const char *_option,
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const char *_value);
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int
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pam_error(const pam_handle_t *_pamh,
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const char *_fmt,
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...)
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OPENPAM_FORMAT ((__printf__, 2, 3))
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OPENPAM_NONNULL((1,2));
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int
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pam_get_authtok(pam_handle_t *_pamh,
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int _item,
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const char **_authtok,
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const char *_prompt)
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OPENPAM_NONNULL((1,3));
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int
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pam_info(const pam_handle_t *_pamh,
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const char *_fmt,
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...)
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OPENPAM_FORMAT ((__printf__, 2, 3))
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OPENPAM_NONNULL((1,2));
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int
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pam_prompt(const pam_handle_t *_pamh,
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int _style,
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char **_resp,
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const char *_fmt,
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...)
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OPENPAM_FORMAT ((__printf__, 4, 5))
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OPENPAM_NONNULL((1,4));
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int
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pam_setenv(pam_handle_t *_pamh,
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const char *_name,
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const char *_value,
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int _overwrite)
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OPENPAM_NONNULL((1,2,3));
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int
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pam_vinfo(const pam_handle_t *_pamh,
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const char *_fmt,
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va_list _ap)
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OPENPAM_FORMAT ((__printf__, 2, 0))
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OPENPAM_NONNULL((1,2));
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int
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pam_verror(const pam_handle_t *_pamh,
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const char *_fmt,
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va_list _ap)
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OPENPAM_FORMAT ((__printf__, 2, 0))
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OPENPAM_NONNULL((1,2));
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int
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pam_vprompt(const pam_handle_t *_pamh,
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int _style,
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char **_resp,
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const char *_fmt,
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va_list _ap)
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OPENPAM_FORMAT ((__printf__, 4, 0))
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OPENPAM_NONNULL((1,4));
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/*
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* Read cooked lines.
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* Checking for _IOFBF is a fairly reliable way to detect the presence
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* of <stdio.h>, as SUSv3 requires it to be defined there.
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*/
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#ifdef _IOFBF
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char *
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openpam_readline(FILE *_f,
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int *_lineno,
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size_t *_lenp)
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OPENPAM_NONNULL((1));
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char **
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openpam_readlinev(FILE *_f,
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int *_lineno,
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int *_lenp)
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OPENPAM_NONNULL((1));
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char *
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openpam_readword(FILE *_f,
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int *_lineno,
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size_t *_lenp)
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OPENPAM_NONNULL((1));
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#endif
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int
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openpam_straddch(char **_str,
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size_t *_sizep,
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size_t *_lenp,
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int ch)
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OPENPAM_NONNULL((1));
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/*
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* Enable / disable optional features
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*/
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enum {
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OPENPAM_RESTRICT_SERVICE_NAME,
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OPENPAM_VERIFY_POLICY_FILE,
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OPENPAM_RESTRICT_MODULE_NAME,
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OPENPAM_VERIFY_MODULE_FILE,
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OPENPAM_FALLBACK_TO_OTHER,
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OPENPAM_NUM_FEATURES
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};
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int
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openpam_set_feature(int _feature, int _onoff);
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int
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openpam_get_feature(int _feature, int *_onoff);
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/*
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* Log levels
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*/
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enum {
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PAM_LOG_LIBDEBUG = -1,
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PAM_LOG_DEBUG,
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PAM_LOG_VERBOSE,
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PAM_LOG_NOTICE,
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PAM_LOG_ERROR
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};
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/*
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* Log to syslog
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*/
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void
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_openpam_log(int _level,
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const char *_func,
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const char *_fmt,
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...)
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OPENPAM_FORMAT ((__printf__, 3, 4))
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OPENPAM_NONNULL((3));
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#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
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#define openpam_log(lvl, ...) \
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_openpam_log((lvl), __func__, __VA_ARGS__)
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#elif defined(__GNUC__) && (__GNUC__ >= 3)
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#define openpam_log(lvl, ...) \
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_openpam_log((lvl), __func__, __VA_ARGS__)
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#elif defined(__GNUC__) && (__GNUC__ >= 2) && (__GNUC_MINOR__ >= 95)
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#define openpam_log(lvl, fmt...) \
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_openpam_log((lvl), __func__, ##fmt)
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#elif defined(__GNUC__) && defined(__FUNCTION__)
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#define openpam_log(lvl, fmt...) \
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_openpam_log((lvl), __FUNCTION__, ##fmt)
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#else
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void
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openpam_log(int _level,
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const char *_format,
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...)
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OPENPAM_FORMAT ((__printf__, 2, 3))
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OPENPAM_NONNULL((2));
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#endif
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/*
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* Generic conversation function
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*/
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struct pam_message;
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struct pam_response;
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int openpam_ttyconv(int _n,
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const struct pam_message **_msg,
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struct pam_response **_resp,
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void *_data);
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extern int openpam_ttyconv_timeout;
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/*
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* Null conversation function
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*/
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int openpam_nullconv(int _n,
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const struct pam_message **_msg,
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struct pam_response **_resp,
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void *_data);
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/*
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* PAM primitives
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*/
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enum {
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PAM_SM_AUTHENTICATE,
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PAM_SM_SETCRED,
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PAM_SM_ACCT_MGMT,
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PAM_SM_OPEN_SESSION,
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PAM_SM_CLOSE_SESSION,
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PAM_SM_CHAUTHTOK,
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/* keep this last */
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PAM_NUM_PRIMITIVES
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};
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/*
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* Dummy service module function
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*/
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#define PAM_SM_DUMMY(type) \
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PAM_EXTERN int \
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pam_sm_##type(pam_handle_t *pamh, int flags, \
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int argc, const char *argv[]) \
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{ \
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\
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(void)pamh; \
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(void)flags; \
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(void)argc; \
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(void)argv; \
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return (PAM_IGNORE); \
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}
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/*
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* PAM service module functions match this typedef
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*/
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struct pam_handle;
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typedef int (*pam_func_t)(struct pam_handle *, int, int, const char **);
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/*
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* A struct that describes a module.
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*/
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typedef struct pam_module pam_module_t;
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struct pam_module {
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char *path;
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pam_func_t func[PAM_NUM_PRIMITIVES];
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void *dlh;
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};
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/*
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* Source-code compatibility with Linux-PAM modules
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*/
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#if defined(PAM_SM_AUTH) || defined(PAM_SM_ACCOUNT) || \
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defined(PAM_SM_SESSION) || defined(PAM_SM_PASSWORD)
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# define LINUX_PAM_MODULE
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#endif
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#if defined(LINUX_PAM_MODULE) && !defined(PAM_SM_AUTH)
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# define _PAM_SM_AUTHENTICATE 0
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# define _PAM_SM_SETCRED 0
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#else
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# undef PAM_SM_AUTH
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# define PAM_SM_AUTH
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# define _PAM_SM_AUTHENTICATE pam_sm_authenticate
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# define _PAM_SM_SETCRED pam_sm_setcred
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#endif
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#if defined(LINUX_PAM_MODULE) && !defined(PAM_SM_ACCOUNT)
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# define _PAM_SM_ACCT_MGMT 0
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#else
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# undef PAM_SM_ACCOUNT
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# define PAM_SM_ACCOUNT
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# define _PAM_SM_ACCT_MGMT pam_sm_acct_mgmt
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#endif
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#if defined(LINUX_PAM_MODULE) && !defined(PAM_SM_SESSION)
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# define _PAM_SM_OPEN_SESSION 0
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# define _PAM_SM_CLOSE_SESSION 0
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#else
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# undef PAM_SM_SESSION
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# define PAM_SM_SESSION
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# define _PAM_SM_OPEN_SESSION pam_sm_open_session
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# define _PAM_SM_CLOSE_SESSION pam_sm_close_session
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#endif
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#if defined(LINUX_PAM_MODULE) && !defined(PAM_SM_PASSWORD)
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# define _PAM_SM_CHAUTHTOK 0
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#else
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# undef PAM_SM_PASSWORD
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# define PAM_SM_PASSWORD
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# define _PAM_SM_CHAUTHTOK pam_sm_chauthtok
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#endif
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/*
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* Infrastructure for static modules using GCC linker sets.
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* You are not expected to understand this.
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*/
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#if !defined(PAM_SOEXT)
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# define PAM_SOEXT ".so"
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#endif
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#if defined(OPENPAM_STATIC_MODULES)
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# if !defined(__GNUC__)
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# error "Don't know how to build static modules on non-GNU compilers"
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# endif
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/* gcc, static linking */
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# include <sys/cdefs.h>
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# include <linker_set.h>
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# define PAM_EXTERN static
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# define PAM_MODULE_ENTRY(name) \
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static char _pam_name[] = name PAM_SOEXT; \
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static struct pam_module _pam_module = { \
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.path = _pam_name, \
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.func = { \
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[PAM_SM_AUTHENTICATE] = _PAM_SM_AUTHENTICATE, \
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[PAM_SM_SETCRED] = _PAM_SM_SETCRED, \
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[PAM_SM_ACCT_MGMT] = _PAM_SM_ACCT_MGMT, \
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[PAM_SM_OPEN_SESSION] = _PAM_SM_OPEN_SESSION, \
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[PAM_SM_CLOSE_SESSION] = _PAM_SM_CLOSE_SESSION, \
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[PAM_SM_CHAUTHTOK] = _PAM_SM_CHAUTHTOK \
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}, \
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}; \
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DATA_SET(_openpam_static_modules, _pam_module)
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#else
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/* normal case */
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# define PAM_EXTERN
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# define PAM_MODULE_ENTRY(name)
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* !SECURITY_OPENPAM_H_INCLUDED */
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