/* * Copyright (c) 1994-1996, 1998-1999, 2001, 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 #if defined(HAVE_SKEY) # include # define RFC1938 skey # ifdef __NetBSD__ # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d)) # else # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c)) # endif # define rfc1938verify(a,b) skeyverify((a),(b)) #elif defined(HAVE_OPIE) # include # define RFC1938 opie # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c)) # define rfc1938verify(a,b) opieverify((a),(b)) #endif #include "sudo.h" #include "sudo_auth.h" #ifndef lint static const char rcsid[] = "$Sudo: rfc1938.c,v 1.16 2004/02/13 21:36:47 millert Exp $"; #endif /* lint */ int rfc1938_setup(pw, promptp, auth) struct passwd *pw; char **promptp; sudo_auth *auth; { char challenge[256]; static char *orig_prompt = NULL, *new_prompt = NULL; static int op_len, np_size; static struct RFC1938 rfc1938; /* Stash a pointer to the rfc1938 struct if we have not initialized */ if (!auth->data) auth->data = &rfc1938; /* Save the original prompt */ if (orig_prompt == NULL) { orig_prompt = *promptp; op_len = strlen(orig_prompt); /* Ignore trailing colon (we will add our own) */ if (orig_prompt[op_len - 1] == ':') op_len--; else if (op_len >= 2 && orig_prompt[op_len - 1] == ' ' && orig_prompt[op_len - 2] == ':') op_len -= 2; } #ifdef HAVE_SKEY /* Close old stream */ if (rfc1938.keyfile) (void) fclose(rfc1938.keyfile); #endif /* * Look up the user and get the rfc1938 challenge. * If the user is not in the OTP db, only post a fatal error if * we are running alone (since they may just use a normal passwd). */ if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) { if (IS_ONEANDONLY(auth)) { warnx("you do not exist in the %s database", auth->name); return(AUTH_FATAL); } else { return(AUTH_FAILURE); } } /* Get space for new prompt with embedded challenge */ if (np_size < op_len + strlen(challenge) + 7) { np_size = op_len + strlen(challenge) + 7; new_prompt = (char *) erealloc(new_prompt, np_size); } if (def_long_otp_prompt) (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt); else (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len, orig_prompt, challenge); *promptp = new_prompt; return(AUTH_SUCCESS); } int rfc1938_verify(pw, pass, auth) struct passwd *pw; char *pass; sudo_auth *auth; { if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0) return(AUTH_SUCCESS); else return(AUTH_FAILURE); }