diff options
Diffstat (limited to 'plugins/sudoers/auth/fwtk.c')
| -rw-r--r-- | plugins/sudoers/auth/fwtk.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/plugins/sudoers/auth/fwtk.c b/plugins/sudoers/auth/fwtk.c new file mode 100644 index 0000000..36f7cd8 --- /dev/null +++ b/plugins/sudoers/auth/fwtk.c @@ -0,0 +1,154 @@ +/* + * Copyright (c) 1999-2005, 2008, 2010-2015 + * Todd C. Miller <Todd.Miller@sudo.ws> + * + * 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 + */ + +#include <config.h> + +#ifdef HAVE_FWTK + +#include <sys/types.h> +#include <stdio.h> +#include <stdlib.h> +#ifdef HAVE_STRING_H +# include <string.h> +#endif /* HAVE_STRING_H */ +#ifdef HAVE_STRINGS_H +# include <strings.h> +#endif /* HAVE_STRING_H */ +#include <unistd.h> +#include <pwd.h> + +#include <auth.h> +#include <firewall.h> + +#include "sudoers.h" +#include "sudo_auth.h" + +int +sudo_fwtk_init(struct passwd *pw, sudo_auth *auth) +{ + static Cfg *confp; /* Configuration entry struct */ + char resp[128]; /* Response from the server */ + debug_decl(sudo_fwtk_init, SUDOERS_DEBUG_AUTH) + + if ((confp = cfg_read("sudo")) == (Cfg *)-1) { + sudo_warnx(U_("unable to read fwtk config")); + debug_return_int(AUTH_FATAL); + } + + if (auth_open(confp)) { + sudo_warnx(U_("unable to connect to authentication server")); + debug_return_int(AUTH_FATAL); + } + + /* Get welcome message from auth server */ + if (auth_recv(resp, sizeof(resp))) { + sudo_warnx(U_("lost connection to authentication server")); + debug_return_int(AUTH_FATAL); + } + if (strncmp(resp, "Authsrv ready", 13) != 0) { + sudo_warnx(U_("authentication server error:\n%s"), resp); + debug_return_int(AUTH_FATAL); + } + + debug_return_int(AUTH_SUCCESS); +} + +int +sudo_fwtk_verify(struct passwd *pw, char *prompt, sudo_auth *auth, struct sudo_conv_callback *callback) +{ + char *pass; /* Password from the user */ + char buf[SUDO_CONV_REPL_MAX + 12]; /* General prupose buffer */ + char resp[128]; /* Response from the server */ + int error; + debug_decl(sudo_fwtk_verify, SUDOERS_DEBUG_AUTH) + + /* Send username to authentication server. */ + (void) snprintf(buf, sizeof(buf), "authorize %s 'sudo'", pw->pw_name); +restart: + if (auth_send(buf) || auth_recv(resp, sizeof(resp))) { + sudo_warnx(U_("lost connection to authentication server")); + debug_return_int(AUTH_FATAL); + } + + /* Get the password/response from the user. */ + if (strncmp(resp, "challenge ", 10) == 0) { + (void) snprintf(buf, sizeof(buf), "%s\nResponse: ", &resp[10]); + pass = auth_getpass(buf, SUDO_CONV_PROMPT_ECHO_OFF, callback); + if (pass && *pass == '\0') { + free(pass); + pass = auth_getpass("Response [echo on]: ", + SUDO_CONV_PROMPT_ECHO_ON, callback); + } + } else if (strncmp(resp, "chalnecho ", 10) == 0) { + pass = auth_getpass(&resp[10], SUDO_CONV_PROMPT_ECHO_OFF, callback); + } else if (strncmp(resp, "password", 8) == 0) { + pass = auth_getpass(prompt, SUDO_CONV_PROMPT_ECHO_OFF, callback); + } else if (strncmp(resp, "display ", 8) == 0) { + sudo_printf(SUDO_CONV_INFO_MSG, "%s\n", &resp[8]); + strlcpy(buf, "response dummy", sizeof(buf)); + goto restart; + } else { + sudo_warnx("%s", resp); + debug_return_int(AUTH_FATAL); + } + if (!pass) { /* ^C or error */ + debug_return_int(AUTH_INTR); + } + + /* Send the user's response to the server */ + (void) snprintf(buf, sizeof(buf), "response '%s'", pass); + if (auth_send(buf) || auth_recv(resp, sizeof(resp))) { + sudo_warnx(U_("lost connection to authentication server")); + error = AUTH_FATAL; + goto done; + } + + if (strncmp(resp, "ok", 2) == 0) { + error = AUTH_SUCCESS; + goto done; + } + + /* Main loop prints "Permission Denied" or insult. */ + if (strcmp(resp, "Permission Denied.") != 0) + sudo_warnx("%s", resp); + error = AUTH_FAILURE; +done: + memset_s(buf, sizeof(buf), 0, sizeof(buf)); + memset_s(pass, SUDO_PASS_MAX, 0, strlen(pass)); + free(pass); + debug_return_int(error); +} + +int +sudo_fwtk_cleanup(struct passwd *pw, sudo_auth *auth) +{ + debug_decl(sudo_fwtk_cleanup, SUDOERS_DEBUG_AUTH) + + auth_close(); + debug_return_int(AUTH_SUCCESS); +} + +#endif /* HAVE_FWTK */ |