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181e6f32 | 1 | /* |
2 | * Copyright (c) 2005 The SCO Group. All rights reserved. | |
3 | * Copyright (c) 2005 Tim Rice. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | */ | |
25 | ||
26 | #include "includes.h" | |
27 | ||
28 | #if defined(HAVE_LIBIAF) && !defined(BROKEN_LIBIAF) | |
29 | #ifdef HAVE_CRYPT_H | |
30 | #include <crypt.h> | |
31 | #endif | |
32 | #include "packet.h" | |
33 | #include "buffer.h" | |
34 | #include "log.h" | |
35 | #include "servconf.h" | |
36 | #include "auth.h" | |
37 | #include "auth-options.h" | |
38 | ||
39 | int nischeck(char *); | |
40 | ||
41 | int | |
42 | sys_auth_passwd(Authctxt *authctxt, const char *password) | |
43 | { | |
44 | struct passwd *pw = authctxt->pw; | |
45 | char *encrypted_password; | |
46 | char *salt; | |
47 | int result; | |
48 | ||
49 | /* Just use the supplied fake password if authctxt is invalid */ | |
50 | char *pw_password = authctxt->valid ? shadow_pw(pw) : pw->pw_passwd; | |
51 | ||
52 | /* Check for users with no password. */ | |
53 | if (strcmp(pw_password, "") == 0 && strcmp(password, "") == 0) | |
54 | return (1); | |
55 | ||
56 | /* Encrypt the candidate password using the proper salt. */ | |
57 | salt = (pw_password[0] && pw_password[1]) ? pw_password : "xx"; | |
58 | #ifdef UNIXWARE_LONG_PASSWORDS | |
59 | if (!nischeck(pw->pw_name)) | |
60 | encrypted_password = bigcrypt(password, salt); | |
61 | else | |
62 | #endif /* UNIXWARE_LONG_PASSWORDS */ | |
63 | encrypted_password = xcrypt(password, salt); | |
64 | ||
65 | /* | |
66 | * Authentication is accepted if the encrypted passwords | |
67 | * are identical. | |
68 | */ | |
69 | result = (strcmp(encrypted_password, pw_password) == 0); | |
70 | ||
71 | if (authctxt->valid) | |
72 | free(pw_password); | |
73 | return(result); | |
74 | } | |
75 | ||
76 | #ifdef UNIXWARE_LONG_PASSWORDS | |
77 | int | |
78 | nischeck(char *namep) | |
79 | { | |
80 | char password_file[] = "/etc/passwd"; | |
81 | FILE *fd; | |
82 | struct passwd *ent = NULL; | |
83 | ||
84 | if ((fd = fopen (password_file, "r")) == NULL) { | |
85 | /* | |
86 | * If the passwd file has dissapeared we are in a bad state. | |
87 | * However, returning 0 will send us back through the | |
88 | * authentication scheme that has checked the ia database for | |
89 | * passwords earlier. | |
90 | */ | |
91 | return(0); | |
92 | } | |
93 | ||
94 | /* | |
95 | * fgetpwent() only reads from password file, so we know for certain | |
96 | * that the user is local. | |
97 | */ | |
98 | while (ent = fgetpwent(fd)) { | |
99 | if (strcmp (ent->pw_name, namep) == 0) { | |
100 | /* Local user */ | |
101 | fclose (fd); | |
102 | return(0); | |
103 | } | |
104 | } | |
105 | ||
106 | fclose (fd); | |
107 | return (1); | |
108 | } | |
109 | ||
110 | #endif /* UNIXWARE_LONG_PASSWORDS */ | |
111 | ||
112 | /* | |
113 | NOTE: ia_get_logpwd() allocates memory for arg 2 | |
114 | functions that call shadow_pw() will need to free | |
115 | */ | |
116 | ||
117 | char * | |
118 | get_iaf_password(struct passwd *pw) | |
119 | { | |
120 | char *pw_password = NULL; | |
121 | ||
122 | uinfo_t uinfo; | |
123 | if (!ia_openinfo(pw->pw_name,&uinfo)) { | |
124 | ia_get_logpwd(uinfo, &pw_password); | |
125 | if (pw_password == NULL) | |
126 | fatal("ia_get_logpwd: Unable to get the shadow passwd"); | |
127 | ia_closeinfo(uinfo); | |
128 | return pw_password; | |
129 | } | |
130 | else | |
131 | fatal("ia_openinfo: Unable to open the shadow passwd file"); | |
132 | } | |
133 | #endif /* HAVE_LIBIAF && !BROKEN_LIBIAF */ | |
134 |