/* * SPDX-License-Identifier: ISC * * Copyright (c) 1996, 1998-2005, 2010-2012, 2014-2015 * Todd C. Miller * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * * Sponsored in part by the Defense Advanced Research Projects * Agency (DARPA) and Air Force Research Laboratory, Air Force * Materiel Command, USAF, under agreement number F39502-99-1-0512. */ /* * This is an open source non-commercial project. Dear PVS-Studio, please check it. * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com */ /* * The code below basically comes from the examples supplied on * the OSF DCE 1.0.3 manpages for the sec_login routines, with * enough additional polishing to make the routine work with the * rest of sudo. * * This code is known to work on HP 700 and 800 series systems * running HP-UX 9.X and 10.X, with either HP's version 1.2.1 of DCE. * (aka, OSF DCE 1.0.3) or with HP's version 1.4 of DCE (aka, OSF * DCE 1.1). */ #include #ifdef HAVE_DCE #include #include #include #include #include #include #include #include #include /* required to call dce_error_inq_text routine */ #include #include "sudo_auth.h" #include static int check_dce_status(error_status_t, char *); int sudo_dce_verify(const struct sudoers_context *ctx, struct passwd *pw, const char *plain_pw, sudo_auth *auth, struct sudo_conv_callback *callback) { struct passwd temp_pw; sec_passwd_rec_t password_rec; sec_login_handle_t login_context; boolean32 reset_passwd; sec_login_auth_src_t auth_src; error_status_t status; debug_decl(sudo_dce_verify, SUDOERS_DEBUG_AUTH); if (IS_NONINTERACTIVE(auth)) debug_return_int(AUTH_NONINTERACTIVE); /* Display lecture if needed and we haven't already done so. */ display_lecture(callback); /* * Create the local context of the DCE principal necessary * to perform authenticated network operations. The network * identity set up by this operation cannot be used until it * is validated via sec_login_validate_identity(). */ if (sec_login_setup_identity((unsigned_char_p_t) pw->pw_name, sec_login_no_flags, &login_context, &status)) { if (check_dce_status(status, "sec_login_setup_identity(1):")) debug_return_int(AUTH_FAILURE); password_rec.key.key_type = sec_passwd_plain; password_rec.key.tagged_union.plain = (idl_char *) plain_pw; password_rec.pepper = NULL; password_rec.version_number = sec_passwd_c_version_none; /* Validate the login context with the password */ if (sec_login_validate_identity(login_context, &password_rec, &reset_passwd, &auth_src, &status)) { if (check_dce_status(status, "sec_login_validate_identity(1):")) debug_return_int(AUTH_FAILURE); /* * Certify that the DCE Security Server used to set * up and validate a login context is legitimate. Makes * sure that we didn't get spoofed by another DCE server. */ if (!sec_login_certify_identity(login_context, &status)) { sudo_printf(SUDO_CONV_ERROR_MSG|SUDO_CONV_PREFER_TTY, "Whoa! Bogus authentication server!\n"); (void) check_dce_status(status,"sec_login_certify_identity(1):"); debug_return_int(AUTH_FAILURE); } if (check_dce_status(status, "sec_login_certify_identity(2):")) debug_return_int(AUTH_FAILURE); /* * Sets the network credentials to those specified * by the now validated login context. */ sec_login_set_context(login_context, &status); if (check_dce_status(status, "sec_login_set_context:")) debug_return_int(AUTH_FAILURE); /* * Oops, your credentials were no good. Possibly * caused by clock times out of adjustment between * DCE client and DCE security server... */ if (auth_src != sec_login_auth_src_network) { sudo_printf(SUDO_CONV_ERROR_MSG|SUDO_CONV_PREFER_TTY, "You have no network credentials.\n"); debug_return_int(AUTH_FAILURE); } /* Check if the password has aged and is thus no good */ if (reset_passwd) { sudo_printf(SUDO_CONV_ERROR_MSG|SUDO_CONV_PREFER_TTY, "Your DCE password needs resetting.\n"); debug_return_int(AUTH_FAILURE); } /* * We should be a valid user by this point. Pull the * user's password structure from the DCE security * server just to make sure. If we get it with no * problems, then we really are legitimate... */ sec_login_get_pwent(login_context, (sec_login_passwd_t) &temp_pw, &status); if (check_dce_status(status, "sec_login_get_pwent:")) debug_return_int(AUTH_FAILURE); /* * If we get to here, then the pwent above properly fetched * the password structure from the DCE registry, so the user * must be valid. We don't really care what the user's * registry password is, just that the user could be * validated. In fact, if we tried to compare the local * password to the DCE entry at this point, the operation * would fail if the hidden password feature is turned on, * because the password field would contain an asterisk. * Also go ahead and destroy the user's DCE login context * before we leave here (and don't bother checking the * status), in order to clean up credentials files in * /opt/dcelocal/var/security/creds. By doing this, we are * assuming that the user will not need DCE authentication * later in the program, only local authentication. If this * is not true, then the login_context will have to be * returned to the calling program, and the context purged * somewhere later in the program. */ sec_login_purge_context(&login_context, &status); debug_return_int(AUTH_SUCCESS); } else { if(check_dce_status(status, "sec_login_validate_identity(2):")) debug_return_int(AUTH_FAILURE); sec_login_purge_context(&login_context, &status); if(check_dce_status(status, "sec_login_purge_context:")) debug_return_int(AUTH_FAILURE); } } (void) check_dce_status(status, "sec_login_setup_identity(2):"); debug_return_int(AUTH_FAILURE); } /* Returns 0 for DCE "ok" status, 1 otherwise */ static int check_dce_status(error_status_t input_status, char *comment) { int error_stat; unsigned char error_string[dce_c_error_string_len]; debug_decl(check_dce_status, SUDOERS_DEBUG_AUTH); if (input_status == rpc_s_ok) debug_return_int(0); dce_error_inq_text(input_status, error_string, &error_stat); sudo_printf(SUDO_CONV_ERROR_MSG|SUDO_CONV_PREFER_TTY, "%s %s\n", comment, error_string); debug_return_int(1); } #endif /* HAVE_DCE */