Annotation of src/usr.bin/passwd/new_pwd.c, Revision 1.5
1.5 ! deraadt 1: /* $OpenBSD: new_pwd.c,v 1.4 2001/01/29 01:58:14 niklas Exp $ */
1.1 art 2: /* $KTH: new_pwd.c,v 1.11 1997/05/02 14:28:54 assar Exp $ */
3:
4: /*
5: * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
6: * (Royal Institute of Technology, Stockholm, Sweden).
7: * All rights reserved.
1.5 ! deraadt 8: *
1.1 art 9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
1.5 ! deraadt 12: *
1.1 art 13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
1.5 ! deraadt 15: *
1.1 art 16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.5 ! deraadt 19: *
1.1 art 20: * 3. All advertising materials mentioning features or use of this software
21: * must display the following acknowledgement:
22: * This product includes software developed by the Kungliga Tekniska
23: * Högskolan and its contributors.
1.5 ! deraadt 24: *
1.1 art 25: * 4. Neither the name of the Institute nor the names of its contributors
26: * may be used to endorse or promote products derived from this software
27: * without specific prior written permission.
1.5 ! deraadt 28: *
1.1 art 29: * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
30: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32: * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
33: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39: * SUCH DAMAGE.
40: */
41:
42: #include <sys/types.h>
43: #include <sys/socket.h>
44: #include <sys/time.h>
45: #include <sys/resource.h>
46: #include <netinet/in.h>
47: #include <des.h>
48: #include <kerberosIV/krb.h>
49: #include <kerberosIV/kadm.h>
50: #include <stdio.h>
51: #include <stdlib.h>
52: #include <string.h>
1.3 art 53: #include <ctype.h>
1.1 art 54:
55: #ifdef NOENCRYPTION
56: #define read_long_pw_string placebo_read_pw_string
57: #else
58: #define read_long_pw_string des_read_pw_string
59: #endif
60:
61: static char *
62: check_pw (char *pword)
63: {
1.2 deraadt 64: char *t;
65:
66: if (strlen(pword) == 0)
67: return "Null passwords are not allowed - Please enter a longer password.";
1.5 ! deraadt 68:
1.2 deraadt 69: if (strlen(pword) < MIN_KPW_LEN)
70: return "Password is to short - Please enter a longer password.";
1.5 ! deraadt 71:
1.2 deraadt 72: if (strcmp(pword, "s/key") == 0)
73: return "That password collides with a system feature. Choose another.\n";
74:
75: /* Don't allow all lower case passwords regardless of length */
1.1 art 76: for (t = pword; *t && islower(*t); t++)
1.2 deraadt 77: ;
1.1 art 78: if (*t == 0)
1.2 deraadt 79: return "Please don't use an all-lower case password.\n"
80: "\tUnusual capitalization, delimiter characters or "
81: "digits are suggested.";
82: return NULL;
1.1 art 83: }
84:
85: int
86: get_pw_new_pwd(char *pword, int pwlen, krb_principal *pr, int print_realm)
87: {
1.2 deraadt 88: char ppromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
89: char npromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
90: char p[MAX_K_NAME_SZ];
91: char local_realm[REALM_SZ];
92: int status;
93: char *expl;
94: char *q;
1.5 ! deraadt 95:
1.2 deraadt 96: /*
97: * We don't care about failure; this is to determine whether or
1.5 ! deraadt 98: * not to print the realm in the prompt for a new password.
1.2 deraadt 99: */
100: krb_get_lrealm(local_realm, 1);
1.5 ! deraadt 101:
1.2 deraadt 102: if (strcmp(local_realm, pr->realm))
103: print_realm++;
1.1 art 104: krb_unparse_name_r(pr, p);
1.2 deraadt 105: if (print_realm == 0 && (q = strrchr(p, '@')))
106: *q = 0;
107:
108: snprintf(ppromp, sizeof(ppromp), "Old password for %s:", p);
109: if (read_long_pw_string(pword, pwlen-1, ppromp, 0)) {
110: fprintf(stderr, "Error reading old password.\n");
111: return -1;
1.1 art 112: }
1.2 deraadt 113:
1.5 ! deraadt 114: status = krb_get_pw_in_tkt(pr->name, pr->instance, pr->realm,
1.2 deraadt 115: PWSERV_NAME, KADM_SINST, 1, pword);
116: if (status != KSUCCESS) {
117: if (status == INTK_BADPW) {
118: printf("Incorrect old password.\n");
119: return -1;
120: } else {
121: fprintf(stderr, "Kerberos error: %s\n",
122: krb_get_err_text(status));
123: return -1;
124: }
1.1 art 125: }
1.5 ! deraadt 126:
1.2 deraadt 127: memset(pword, 0, pwlen);
1.1 art 128:
1.2 deraadt 129: do {
130: char verify[MAX_KPW_LEN];
131: snprintf(npromp, sizeof(npromp), "New Password for %s:",p);
132: if (read_long_pw_string(pword, pwlen-1, npromp, 0)) {
133: fprintf(stderr,
134: "Error reading new password, password unchanged.\n");
135: return -1;
136: }
137: expl = check_pw (pword);
138: if (expl) {
139: printf("\n\t%s\n\n", expl);
140: continue;
141: }
142:
143: /* Now we got an ok password, verify it. */
144: snprintf(npromp, sizeof(npromp),
145: "Verifying New Password for %s:", p);
146: if (read_long_pw_string(verify, MAX_KPW_LEN-1, npromp, 0)) {
147: fprintf(stderr,
148: "Error reading new password, password unchanged.\n");
149: return -1;
150: }
151: if (strcmp(pword, verify) != 0) {
152: printf("Verify failure - try again\n");
153: expl = ""; /* continue */
154: }
155: } while (expl);
156: return 0;
1.1 art 157: }
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