/* * Copyright (c) 1999-2003 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. */ #include "config.h" #include #include #include #ifdef STDC_HEADERS # include # include #else # ifdef HAVE_STDLIB_H # include # endif #endif /* STDC_HEADERS */ #ifdef HAVE_STRING_H # include #else # ifdef HAVE_STRINGS_H # include # endif #endif /* HAVE_STRING_H */ #ifdef HAVE_UNISTD_H # include #endif /* HAVE_UNISTD_H */ #ifdef HAVE_ERR_H # include #else # include "emul/err.h" #endif /* HAVE_ERR_H */ #include #include #include #include "sudo.h" #include "sudo_auth.h" #ifndef lint static const char rcsid[] = "$Sudo: fwtk.c,v 1.23 2004/02/13 21:36:47 millert Exp $"; #endif /* lint */ int fwtk_init(pw, promptp, auth) struct passwd *pw; char **promptp; sudo_auth *auth; { static Cfg *confp; /* Configuration entry struct */ char resp[128]; /* Response from the server */ if ((confp = cfg_read("sudo")) == (Cfg *)-1) { warnx("cannot read fwtk config"); return(AUTH_FATAL); } if (auth_open(confp)) { warnx("cannot connect to authentication server"); return(AUTH_FATAL); } /* Get welcome message from auth server */ if (auth_recv(resp, sizeof(resp))) { warnx("lost connection to authentication server"); return(AUTH_FATAL); } if (strncmp(resp, "Authsrv ready", 13) != 0) { warnx("authentication server error:\n%s", resp); return(AUTH_FATAL); } return(AUTH_SUCCESS); } int fwtk_verify(pw, prompt, auth) struct passwd *pw; char *prompt; sudo_auth *auth; { char *pass; /* Password from the user */ char buf[SUDO_PASS_MAX + 12]; /* General prupose buffer */ char resp[128]; /* Response from the server */ int error; extern int nil_pw; /* 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))) { warnx("lost connection to authentication server"); return(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 = tgetpass(buf, def_passwd_timeout * 60, tgetpass_flags); if (pass && *pass == '\0') { pass = tgetpass("Response [echo on]: ", def_passwd_timeout * 60, tgetpass_flags | TGP_ECHO); } } else if (strncmp(resp, "chalnecho ", 10) == 0) { pass = tgetpass(&resp[10], def_passwd_timeout * 60, tgetpass_flags); } else if (strncmp(resp, "password", 8) == 0) { pass = tgetpass(prompt, def_passwd_timeout * 60, tgetpass_flags); } else if (strncmp(resp, "display ", 8) == 0) { fprintf(stderr, "%s\n", &resp[8]); strlcpy(buf, "response dummy", sizeof(buf)); goto restart; } else { warnx("%s", resp); return(AUTH_FATAL); } if (!pass) { /* ^C or error */ nil_pw = 1; return(AUTH_FAILURE); } else if (*pass == '\0') /* empty password */ nil_pw = 1; /* 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))) { warnx("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) warnx("%s", resp); error = AUTH_FAILURE; done: zero_bytes(pass, strlen(pass)); zero_bytes(buf, strlen(buf)); return(error); } int fwtk_cleanup(pw, auth) struct passwd *pw; sudo_auth *auth; { auth_close(); return(AUTH_SUCCESS); }