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37 RCSID("$Id: otp.c,v 1.34 2003/02/25 10:55:17 lha Exp $");
43 static char* alg_string;
45 static int version_flag;
48 struct getargs args[] = {
49 { "list", 'l', arg_flag, &listp, "list OTP status" },
50 { "delete", 'd', arg_flag, &deletep, "delete OTP" },
51 { "open", 'o', arg_flag, &openp, "open a locked OTP" },
52 { "renew", 'r', arg_flag, &renewp, "securely renew OTP" },
53 { "hash", 'f', arg_string, &alg_string,
54 "hash algorithm (md4, md5, or sha)", "algorithm"},
55 { "user", 'u', arg_string, &user,
56 "user other than current user (root only)", "user" },
57 { "version", 0, arg_flag, &version_flag },
58 { "help", 'h', arg_flag, &help_flag }
61 int num_args = sizeof(args) / sizeof(args[0]);
66 arg_printusage(args, num_args, NULL, "[num seed]");
71 * Renew the OTP for a user.
72 * The pass-phrase is not required (RFC 1938/8.0)
76 renew (int argc, char **argv, OtpAlgorithm *alg, char *user)
78 OtpContext newctx, *ctx;
86 newctx.n = atoi (argv[0]);
87 strlcpy (newctx.seed, argv[1], sizeof(newctx.seed));
89 snprintf (prompt, sizeof(prompt),
94 if (des_read_pw_string (pw, sizeof(pw), prompt, 0) == 0 &&
95 otp_parse (newctx.key, pw, alg) == 0) {
101 dbm = otp_db_open ();
103 warnx ("otp_db_open failed");
112 * Return 0 if the user could enter the next OTP.
113 * I would rather have returned !=0 but it's shell-like here around.
117 verify_user_otp(char *username)
120 char passwd[OTP_MAX_PASSPHRASE + 1];
121 char prompt[128], ss[256];
123 if (otp_challenge (&ctx, username, ss, sizeof(ss)) != 0) {
124 warnx("no otp challenge found for %s", username);
128 snprintf (prompt, sizeof(prompt), "%s's %s Password: ", username, ss);
129 if(des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0))
131 return otp_verify_user (&ctx, passwd);
135 * Set the OTP for a user
139 set (int argc, char **argv, OtpAlgorithm *alg, char *user)
143 char pw[OTP_MAX_PASSPHRASE + 1];
148 ctx.user = strdup (user);
149 if (ctx.user == NULL)
150 err (1, "out of memory");
152 ctx.n = atoi (argv[0]);
153 strlcpy (ctx.seed, argv[1], sizeof(ctx.seed));
156 if (des_read_pw_string (pw, sizeof(pw), "Pass-phrase: ", 1))
158 if (strlen (pw) < OTP_MIN_PASSPHRASE)
159 printf ("Too short pass-phrase. Use at least %d characters\n",
161 } while(strlen(pw) < OTP_MIN_PASSPHRASE);
162 ctx.alg->init (ctx.key, pw, ctx.seed);
163 for (i = 0; i < ctx.n; ++i)
164 ctx.alg->next (ctx.key);
168 err (1, "otp_db_open failed");
170 ret = otp_put (db, &ctx);
177 * Delete otp of user from the database
181 delete_otp (int argc, char **argv, char *user)
189 errx (1, "otp_db_open failed");
192 ret = otp_delete(db, &ctx);
198 * Tell whether the user has an otp
202 has_an_otp(char *user)
210 warnx ("otp_db_open failed");
211 return 0; /* if no db no otp! */
215 ret = otp_simple_get(db, &ctx);
222 * Get and print out the otp entry for some user
226 print_otp_entry_for_name (void *db, char *user)
231 if (!otp_simple_get(db, &ctx)) {
234 ctx.user, ctx.alg->name, ctx.n, ctx.seed);
238 ctime(&ctx.lock_time));
240 fprintf(stdout, "\n");
245 open_otp (int argc, char **argv, char *user)
253 errx (1, "otp_db_open failed");
256 ret = otp_simple_get (db, &ctx);
258 ret = otp_put (db, &ctx);
264 * Print otp entries for one or all users
268 list_otps (int argc, char **argv, char *user)
275 errx (1, "otp_db_open failed");
278 print_otp_entry_for_name(db, user);
280 /* scans all users... so as to get a deterministic order */
281 while ((pw = getpwent()))
282 print_otp_entry_for_name(db, pw->pw_name);
289 main (int argc, char **argv)
293 OtpAlgorithm *alg = otp_find_alg (OTP_ALG_DEFAULT);
296 setprogname (argv[0]);
297 if(getarg(args, num_args, argc, argv, &optind))
306 if(deletep && uid != 0)
307 errx (1, "Only root can delete OTPs");
309 alg = otp_find_alg (alg_string);
311 errx (1, "Unknown algorithm: %s", alg_string);
313 if (user && uid != 0)
314 errx (1, "Only root can use `-u'");
318 if (!(listp || deletep || renewp || openp))
321 if ( listp + deletep + renewp + defaultp + openp != 1)
322 usage(1); /* one of -d or -l or -r or none */
324 if(deletep || openp || listp) {
326 errx(1, "delete, open, and list requires no arguments");
329 errx(1, "setup, and renew requires `num', and `seed'");
332 return list_otps (argc, argv, user);
337 pwd = k_getpwuid(uid);
339 err (1, "You don't exist");
344 * users other that root must provide the next OTP to update the sequence.
345 * it avoids someone to use a pending session to change an OTP sequence.
348 if (uid != 0 && (defaultp || renewp)) {
349 if (!has_an_otp(user)) {
350 errx (1, "Only root can set an initial OTP");
351 } else { /* Check the next OTP (RFC 1938/8.0: SHOULD) */
352 if (verify_user_otp(user) != 0) {
353 errx (1, "User authentification failed");
359 return delete_otp (argc, argv, user);
361 return renew (argc, argv, alg, user);
363 return open_otp (argc, argv, user);
365 return set (argc, argv, alg, user);