Annotation of embedaddon/sudo/plugins/sudoers/auth/dce.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1996, 1998-2005, 2010-2011
3: * Todd C. Miller <Todd.Miller@courtesan.com>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
17: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
18: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
19: *
20: * Sponsored in part by the Defense Advanced Research Projects
21: * Agency (DARPA) and Air Force Research Laboratory, Air Force
22: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
23: */
24: /*
25: * The code below basically comes from the examples supplied on
26: * the OSF DCE 1.0.3 manpages for the sec_login routines, with
27: * enough additional polishing to make the routine work with the
28: * rest of sudo.
29: *
30: * This code is known to work on HP 700 and 800 series systems
31: * running HP-UX 9.X and 10.X, with either HP's version 1.2.1 of DCE.
32: * (aka, OSF DCE 1.0.3) or with HP's version 1.4 of DCE (aka, OSF
33: * DCE 1.1).
34: */
35:
36: #include <config.h>
37:
38: #include <sys/types.h>
39: #include <sys/param.h>
40: #include <stdio.h>
41: #ifdef STDC_HEADERS
42: # include <stdlib.h>
43: # include <stddef.h>
44: #else
45: # ifdef HAVE_STDLIB_H
46: # include <stdlib.h>
47: # endif
48: #endif /* STDC_HEADERS */
49: #ifdef HAVE_STRING_H
50: # include <string.h>
51: #endif /* HAVE_STRING_H */
52: #ifdef HAVE_STRINGS_H
53: # include <strings.h>
54: #endif /* HAVE_STRING_H */
55: #ifdef HAVE_UNISTD_H
56: # include <unistd.h>
57: #endif /* HAVE_UNISTD_H */
58: #include <pwd.h>
59:
60: #include <dce/rpc.h>
61: #include <dce/sec_login.h>
62: #include <dce/dce_error.h> /* required to call dce_error_inq_text routine */
63:
64: #include "sudoers.h"
65: #include "sudo_auth.h"
66:
67: static int check_dce_status(error_status_t, char *);
68:
69: int
70: dce_verify(struct passwd *pw, char *plain_pw, sudo_auth *auth)
71: {
72: struct passwd temp_pw;
73: sec_passwd_rec_t password_rec;
74: sec_login_handle_t login_context;
75: boolean32 reset_passwd;
76: sec_login_auth_src_t auth_src;
77: error_status_t status;
78:
79: /*
80: * Create the local context of the DCE principal necessary
81: * to perform authenticated network operations. The network
82: * identity set up by this operation cannot be used until it
83: * is validated via sec_login_validate_identity().
84: */
85: if (sec_login_setup_identity((unsigned_char_p_t) pw->pw_name,
86: sec_login_no_flags, &login_context, &status)) {
87:
88: if (check_dce_status(status, "sec_login_setup_identity(1):"))
89: return AUTH_FAILURE;
90:
91: password_rec.key.key_type = sec_passwd_plain;
92: password_rec.key.tagged_union.plain = (idl_char *) plain_pw;
93: password_rec.pepper = NULL;
94: password_rec.version_number = sec_passwd_c_version_none;
95:
96: /* Validate the login context with the password */
97: if (sec_login_validate_identity(login_context, &password_rec,
98: &reset_passwd, &auth_src, &status)) {
99:
100: if (check_dce_status(status, "sec_login_validate_identity(1):"))
101: return AUTH_FAILURE;
102:
103: /*
104: * Certify that the DCE Security Server used to set
105: * up and validate a login context is legitimate. Makes
106: * sure that we didn't get spoofed by another DCE server.
107: */
108: if (!sec_login_certify_identity(login_context, &status)) {
109: (void) fprintf(stderr, "Whoa! Bogus authentication server!\n");
110: (void) check_dce_status(status,"sec_login_certify_identity(1):");
111: return AUTH_FAILURE;
112: }
113: if (check_dce_status(status, "sec_login_certify_identity(2):"))
114: return AUTH_FAILURE;
115:
116: /*
117: * Sets the network credentials to those specified
118: * by the now validated login context.
119: */
120: sec_login_set_context(login_context, &status);
121: if (check_dce_status(status, "sec_login_set_context:"))
122: return AUTH_FAILURE;
123:
124: /*
125: * Oops, your credentials were no good. Possibly
126: * caused by clock times out of adjustment between
127: * DCE client and DCE security server...
128: */
129: if (auth_src != sec_login_auth_src_network) {
130: (void) fprintf(stderr,
131: "You have no network credentials.\n");
132: return AUTH_FAILURE;
133: }
134: /* Check if the password has aged and is thus no good */
135: if (reset_passwd) {
136: (void) fprintf(stderr,
137: "Your DCE password needs resetting.\n");
138: return AUTH_FAILURE;
139: }
140:
141: /*
142: * We should be a valid user by this point. Pull the
143: * user's password structure from the DCE security
144: * server just to make sure. If we get it with no
145: * problems, then we really are legitimate...
146: */
147: sec_login_get_pwent(login_context, (sec_login_passwd_t) &temp_pw,
148: &status);
149: if (check_dce_status(status, "sec_login_get_pwent:"))
150: return AUTH_FAILURE;
151:
152: /*
153: * If we get to here, then the pwent above properly fetched
154: * the password structure from the DCE registry, so the user
155: * must be valid. We don't really care what the user's
156: * registry password is, just that the user could be
157: * validated. In fact, if we tried to compare the local
158: * password to the DCE entry at this point, the operation
159: * would fail if the hidden password feature is turned on,
160: * because the password field would contain an asterisk.
161: * Also go ahead and destroy the user's DCE login context
162: * before we leave here (and don't bother checking the
163: * status), in order to clean up credentials files in
164: * /opt/dcelocal/var/security/creds. By doing this, we are
165: * assuming that the user will not need DCE authentication
166: * later in the program, only local authentication. If this
167: * is not true, then the login_context will have to be
168: * returned to the calling program, and the context purged
169: * somewhere later in the program.
170: */
171: sec_login_purge_context(&login_context, &status);
172: return AUTH_SUCCESS;
173: } else {
174: if(check_dce_status(status, "sec_login_validate_identity(2):"))
175: return AUTH_FAILURE;
176: sec_login_purge_context(&login_context, &status);
177: if(check_dce_status(status, "sec_login_purge_context:"))
178: return AUTH_FAILURE;
179: }
180: }
181: (void) check_dce_status(status, "sec_login_setup_identity(2):");
182: return AUTH_FAILURE;
183: }
184:
185: /* Returns 0 for DCE "ok" status, 1 otherwise */
186: static int
187: check_dce_status(error_status_t input_status, char *comment)
188: {
189: int error_stat;
190: unsigned char error_string[dce_c_error_string_len];
191:
192: if (input_status == rpc_s_ok)
193: return 0;
194: dce_error_inq_text(input_status, error_string, &error_stat);
195: (void) fprintf(stderr, "%s %s\n", comment, error_string);
196: return 1;
197: }
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