2 * Copyright 1988 by the Massachusetts Institute of Technology.
4 * For copying and distribution information, please see the file
7 * change your password with kerberos
9 * $FreeBSD: src/crypto/kerberosIV/kadmin/kpasswd_standalone.c,v 1.1.8.3 2003/02/14 22:37:37 nectar Exp $
10 * $DragonFly: src/crypto/kerberosIV/kadmin/Attic/kpasswd_standalone.c,v 1.2 2003/06/17 04:24:36 dillon Exp $
15 * change your password with kerberos
19 #include <sys/types.h>
20 #include <sys/param.h>
21 #include <netinet/in.h>
32 extern void krb_set_tkt_string();
33 static void go_home(char *, int);
36 int krb_passwd(char *uname, char *iflag, char *rflag, char *uflag)
38 char name[ANAME_SZ]; /* name of user */
39 char inst[INST_SZ]; /* instance of user */
40 char realm[REALM_SZ]; /* realm of user */
41 char default_name[ANAME_SZ];
42 char default_inst[INST_SZ];
43 char default_realm[REALM_SZ];
44 int realm_given = 0; /* True if realm was give on cmdline */
45 int use_default = 1; /* True if we should use default name */
47 int status; /* return code */
51 char tktstring[MAXPATHLEN];
53 void get_pw_new_key();
56 int placebo_long_pw_string();
57 #define read_long_pw_string placebo_read_pw_string
59 #define read_long_pw_string des_read_pw_string
62 bzero(name, sizeof(name));
63 bzero(inst, sizeof(inst));
64 bzero(realm, sizeof(realm));
66 if (krb_get_tf_fullname(TKT_FILE, default_name, default_inst,
67 default_realm) != KSUCCESS) {
68 pw = getpwuid((int) getuid());
70 strcpy(default_name, pw->pw_name);
72 /* seems like a null name is kinda silly */
73 strcpy(default_name, "");
75 strcpy(default_inst, "");
76 if (krb_get_lrealm(default_realm, 1) != KSUCCESS)
77 strcpy(default_realm, KRB_REALM);
81 if ((status = kname_parse(name, inst, realm, uflag))) {
82 errx(2, "Kerberos error: %s", krb_err_txt[status]);
87 if (krb_get_lrealm(realm, 1) != KSUCCESS)
88 strcpy(realm, KRB_REALM);
92 if (k_isname(uname)) {
93 strncpy(name, uname, sizeof(name) - 1);
95 errx(1, "bad name: %s", uname);
100 if (k_isinst(iflag)) {
101 strncpy(inst, iflag, sizeof(inst) - 1);
103 errx(1, "bad instance: %s", iflag);
108 if (k_isrealm(rflag)) {
109 strncpy(realm, rflag, sizeof(realm) - 1);
112 errx(1, "bad realm: %s", rflag);
116 if(uname || iflag || rflag || uflag) use_default = 0;
119 strcpy(name, default_name);
120 strcpy(inst, default_inst);
121 strcpy(realm, default_realm);
124 strcpy(name, default_name);
126 strcpy(realm, default_realm);
129 (void) sprintf(tktstring, "/tmp/tkt_cpw_%d",getpid());
130 krb_set_tkt_string(tktstring);
132 get_pw_new_key(new_key, name, inst, realm, realm_given);
134 if ((status = kadm_init_link("changepw", KRB_MASTER, realm))
136 com_err("kpasswd", status, "while initializing");
137 else if ((status = kadm_change_pw(new_key)) != KADM_SUCCESS)
138 com_err("kpasswd", status, " attempting to change password.");
140 if (status != KADM_SUCCESS)
141 fprintf(stderr,"Password NOT changed.\n");
143 printf("Password changed.\n");
152 void get_pw_new_key(new_key, name, inst, realm, print_realm)
157 int print_realm; /* True if realm was give on cmdline */
159 char ppromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
160 char pword[MAX_KPW_LEN]; /* storage for the password */
161 char npromp[40+ANAME_SZ+INST_SZ+REALM_SZ]; /* for the password prompt */
163 char local_realm[REALM_SZ];
167 * We don't care about failure; this is to determine whether or
168 * not to print the realm in the prompt for a new password.
170 (void) krb_get_lrealm(local_realm, 1);
172 if (strcmp(local_realm, realm))
175 (void) sprintf(ppromp,"Old password for %s%s%s%s%s:",
176 name, *inst ? "." : "", inst,
177 print_realm ? "@" : "", print_realm ? realm : "");
178 if (read_long_pw_string(pword, sizeof(pword)-1, ppromp, 0)) {
179 fprintf(stderr, "Error reading old password.\n");
183 if ((status = krb_get_pw_in_tkt(name, inst, realm, PWSERV_NAME,
184 KADM_SINST, 1, pword)) != KSUCCESS) {
185 if (status == INTK_BADPW) {
186 printf("Incorrect old password.\n");
190 fprintf(stderr, "Kerberos error: %s\n", krb_err_txt[status]);
194 bzero(pword, sizeof(pword));
196 (void) sprintf(npromp,"New Password for %s%s%s%s%s:",
197 name, *inst ? "." : "", inst,
198 print_realm ? "@" : "", print_realm ? realm : "");
199 if (read_long_pw_string(pword, sizeof(pword)-1, npromp, 1))
200 go_home("Error reading new password, password unchanged.\n",0);
201 if (strlen(pword) == 0)
202 printf("Null passwords are not allowed; try again.\n");
203 } while (strlen(pword) == 0);
206 bzero((char *) new_key, sizeof(des_cblock));
207 new_key[0] = (unsigned char) 1;
209 (void) des_string_to_key(pword, (des_cblock *)new_key);
211 bzero(pword, sizeof(pword));
219 fprintf(stderr, str, x);