2 * Copyright (c) 1999-2002 Todd C. Miller <Todd.Miller@courtesan.com>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 * Sponsored in part by the Defense Advanced Research Projects
17 * Agency (DARPA) and Air Force Research Laboratory, Air Force
18 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
23 #include <sys/types.h>
24 #include <sys/param.h>
33 #endif /* STDC_HEADERS */
37 # ifdef HAVE_STRINGS_H
40 #endif /* HAVE_STRING_H */
43 #endif /* HAVE_UNISTD_H */
47 #include "sudo_auth.h"
50 static const char rcsid[] = "$Sudo: passwd.c,v 1.14 2004/02/13 21:36:47 millert Exp $";
54 #define HAS_AGEINFO(p, l) (l == 18 && p[DESLEN] == ',')
57 passwd_init(pw, promptp, auth)
62 #ifdef HAVE_SKEYACCESS
63 if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
70 passwd_verify(pw, pass, auth)
79 pw_len = strlen(pw->pw_passwd);
81 #ifdef HAVE_GETAUTHUID
82 /* Ultrix shadow passwords may use crypt16() */
83 error = strcmp(pw->pw_passwd, (char *) crypt16(pass, pw->pw_passwd));
86 #endif /* HAVE_GETAUTHUID */
89 * Truncate to 8 chars if standard DES since not all crypt()'s do this.
90 * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
93 if (pw_len == DESLEN || HAS_AGEINFO(pw->pw_passwd, pw_len))
97 * Normal UN*X password check.
98 * HP-UX may add aging info (separated by a ',') at the end so
99 * only compare the first DESLEN characters in that case.
101 epass = (char *) crypt(pass, pw->pw_passwd);
103 if (HAS_AGEINFO(pw->pw_passwd, pw_len) && strlen(epass) == DESLEN)
104 error = strncmp(pw->pw_passwd, epass, DESLEN);
106 error = strcmp(pw->pw_passwd, epass);
108 return(error ? AUTH_FAILURE : AUTH_SUCCESS);