2 * Copyright (c) 1999-2001 Todd C. Miller <Todd.Miller@courtesan.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * 4. Products derived from this software may not be called "Sudo" nor
20 * may "Sudo" appear in their names without specific prior written
21 * permission from the author.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
24 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
25 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
26 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
27 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 #include <sys/types.h>
38 #include <sys/param.h>
47 #endif /* STDC_HEADERS */
51 # ifdef HAVE_STRINGS_H
54 #endif /* HAVE_STRING_H */
57 #endif /* HAVE_UNISTD_H */
61 #include "sudo_auth.h"
64 static const char rcsid[] = "$Sudo: passwd.c,v 1.11 2002/01/17 15:56:15 millert Exp $";
68 #define HAS_AGEINFO(p, l) (l == 18 && p[DESLEN] == ',')
71 passwd_init(pw, promptp, auth)
76 #ifdef HAVE_SKEYACCESS
77 if (skeyaccess(pw, user_tty, NULL, NULL) == 0)
84 passwd_verify(pw, pass, auth)
93 pw_len = strlen(pw->pw_passwd);
95 #ifdef HAVE_GETAUTHUID
96 /* Ultrix shadow passwords may use crypt16() */
97 error = strcmp(pw->pw_passwd, (char *) crypt16(pass, pw->pw_passwd));
100 #endif /* HAVE_GETAUTHUID */
103 * Truncate to 8 chars if standard DES since not all crypt()'s do this.
104 * If this turns out not to be safe we will have to use OS #ifdef's (sigh).
107 if (pw_len == DESLEN || HAS_AGEINFO(pw->pw_passwd, pw_len))
111 * Normal UN*X password check.
112 * HP-UX may add aging info (separated by a ',') at the end so
113 * only compare the first DESLEN characters in that case.
115 epass = (char *) crypt(pass, pw->pw_passwd);
117 if (HAS_AGEINFO(pw->pw_passwd, pw_len) && strlen(epass) == DESLEN)
118 error = strncmp(pw->pw_passwd, epass, DESLEN);
120 error = strcmp(pw->pw_passwd, epass);
122 return(error ? AUTH_FAILURE : AUTH_SUCCESS);