Annotation of embedaddon/sudo/plugins/sudoers/auth/rfc1938.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (c) 1994-1996, 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: *
17: * Sponsored in part by the Defense Advanced Research Projects
18: * Agency (DARPA) and Air Force Research Laboratory, Air Force
19: * Materiel Command, USAF, under agreement number F39502-99-1-0512.
20: */
21:
22: #include <config.h>
23:
24: #include <sys/types.h>
25: #include <sys/param.h>
26: #include <stdio.h>
27: #ifdef STDC_HEADERS
28: # include <stdlib.h>
29: # include <stddef.h>
30: #else
31: # ifdef HAVE_STDLIB_H
32: # include <stdlib.h>
33: # endif
34: #endif /* STDC_HEADERS */
35: #ifdef HAVE_STRING_H
36: # include <string.h>
37: #endif /* HAVE_STRING_H */
38: #ifdef HAVE_STRINGS_H
39: # include <strings.h>
40: #endif /* HAVE_STRINGS_H */
41: #ifdef HAVE_UNISTD_H
42: # include <unistd.h>
43: #endif /* HAVE_UNISTD_H */
44: #include <pwd.h>
45:
46: #if defined(HAVE_SKEY)
47: # include <skey.h>
48: # define RFC1938 skey
49: # ifdef HAVE_RFC1938_SKEYCHALLENGE
50: # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c),(d))
51: # else
52: # define rfc1938challenge(a,b,c,d) skeychallenge((a),(b),(c))
53: # endif
54: # define rfc1938verify(a,b) skeyverify((a),(b))
55: #elif defined(HAVE_OPIE)
56: # include <opie.h>
57: # define RFC1938 opie
58: # define rfc1938challenge(a,b,c,d) opiechallenge((a),(b),(c))
59: # define rfc1938verify(a,b) opieverify((a),(b))
60: #endif
61:
62: #include "sudoers.h"
63: #include "sudo_auth.h"
64:
65: int
66: rfc1938_setup(struct passwd *pw, char **promptp, sudo_auth *auth)
67: {
68: char challenge[256];
69: static char *orig_prompt = NULL, *new_prompt = NULL;
70: static int op_len, np_size;
71: static struct RFC1938 rfc1938;
72:
73: /* Stash a pointer to the rfc1938 struct if we have not initialized */
74: if (!auth->data)
75: auth->data = &rfc1938;
76:
77: /* Save the original prompt */
78: if (orig_prompt == NULL) {
79: orig_prompt = *promptp;
80: op_len = strlen(orig_prompt);
81:
82: /* Ignore trailing colon (we will add our own) */
83: if (orig_prompt[op_len - 1] == ':')
84: op_len--;
85: else if (op_len >= 2 && orig_prompt[op_len - 1] == ' '
86: && orig_prompt[op_len - 2] == ':')
87: op_len -= 2;
88: }
89:
90: #ifdef HAVE_SKEY
91: /* Close old stream */
92: if (rfc1938.keyfile)
93: (void) fclose(rfc1938.keyfile);
94: #endif
95:
96: /*
97: * Look up the user and get the rfc1938 challenge.
98: * If the user is not in the OTP db, only post a fatal error if
99: * we are running alone (since they may just use a normal passwd).
100: */
101: if (rfc1938challenge(&rfc1938, pw->pw_name, challenge, sizeof(challenge))) {
102: if (IS_ONEANDONLY(auth)) {
103: warningx(_("you do not exist in the %s database"), auth->name);
104: return AUTH_FATAL;
105: } else {
106: return AUTH_FAILURE;
107: }
108: }
109:
110: /* Get space for new prompt with embedded challenge */
111: if (np_size < op_len + strlen(challenge) + 7) {
112: np_size = op_len + strlen(challenge) + 7;
113: new_prompt = (char *) erealloc(new_prompt, np_size);
114: }
115:
116: if (def_long_otp_prompt)
117: (void) snprintf(new_prompt, np_size, "%s\n%s", challenge, orig_prompt);
118: else
119: (void) snprintf(new_prompt, np_size, "%.*s [ %s ]:", op_len,
120: orig_prompt, challenge);
121:
122: *promptp = new_prompt;
123: return AUTH_SUCCESS;
124: }
125:
126: int
127: rfc1938_verify(struct passwd *pw, char *pass, sudo_auth *auth)
128: {
129:
130: if (rfc1938verify((struct RFC1938 *) auth->data, pass) == 0)
131: return AUTH_SUCCESS;
132: else
133: return AUTH_FAILURE;
134: }
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