/* * Copyright (c) 1997-2002 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * 3. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "kuser_locl.h" RCSID("$Id: kinit.c,v 1.90.4.5 2004/06/21 08:17:06 lha Exp $"); int forwardable_flag = -1; int proxiable_flag = -1; int renewable_flag = -1; int renew_flag = 0; int validate_flag = 0; int version_flag = 0; int help_flag = 0; int addrs_flag = 1; struct getarg_strings extra_addresses; int anonymous_flag = 0; char *lifetime = NULL; char *renew_life = NULL; char *server = NULL; char *cred_cache = NULL; char *start_str = NULL; struct getarg_strings etype_str; int use_keytab = 0; char *keytab_str = NULL; int do_afslog = -1; #ifdef KRB4 int get_v4_tgt = -1; int convert_524; #endif int fcache_version; static struct getargs args[] = { #ifdef KRB4 { "524init", '4', arg_flag, &get_v4_tgt, "obtain version 4 TGT" }, { "524convert", '9', arg_flag, &convert_524, "only convert ticket to version 4" }, #endif { "afslog", 0 , arg_flag, &do_afslog, "obtain afs tokens" }, { "cache", 'c', arg_string, &cred_cache, "credentials cache", "cachename" }, { "forwardable", 'f', arg_flag, &forwardable_flag, "get forwardable tickets"}, { "keytab", 't', arg_string, &keytab_str, "keytab to use", "keytabname" }, { "lifetime", 'l', arg_string, &lifetime, "lifetime of tickets", "time"}, { "proxiable", 'p', arg_flag, &proxiable_flag, "get proxiable tickets" }, { "renew", 'R', arg_flag, &renew_flag, "renew TGT" }, { "renewable", 0, arg_flag, &renewable_flag, "get renewable tickets" }, { "renewable-life", 'r', arg_string, &renew_life, "renewable lifetime of tickets", "time" }, { "server", 'S', arg_string, &server, "server to get ticket for", "principal" }, { "start-time", 's', arg_string, &start_str, "when ticket gets valid", "time" }, { "use-keytab", 'k', arg_flag, &use_keytab, "get key from keytab" }, { "validate", 'v', arg_flag, &validate_flag, "validate TGT" }, { "enctypes", 'e', arg_strings, &etype_str, "encryption types to use", "enctypes" }, { "fcache-version", 0, arg_integer, &fcache_version, "file cache version to create" }, { "addresses", 0, arg_negative_flag, &addrs_flag, "request a ticket with no addresses" }, { "extra-addresses",'a', arg_strings, &extra_addresses, "include these extra addresses", "addresses" }, { "anonymous", 0, arg_flag, &anonymous_flag, "request an anonymous ticket" }, { "version", 0, arg_flag, &version_flag }, { "help", 0, arg_flag, &help_flag } }; static void usage (int ret) { arg_printusage (args, sizeof(args)/sizeof(*args), NULL, "[principal [command]]"); exit (ret); } #ifdef KRB4 /* for when the KDC tells us it's a v4 one, we try to talk that */ static int key_to_key(const char *user, char *instance, const char *realm, const void *arg, des_cblock *key) { memcpy(key, arg, sizeof(des_cblock)); return 0; } static int do_v4_fallback (krb5_context context, const krb5_principal principal, int lifetime, int use_srvtab, const char *srvtab_str, const char *passwd) { int ret; krb_principal princ; des_cblock key; krb5_error_code kret; if (lifetime == 0) lifetime = DEFAULT_TKT_LIFE; else lifetime = krb_time_to_life (0, lifetime); kret = krb5_524_conv_principal (context, principal, princ.name, princ.instance, princ.realm); if (kret) { krb5_warn (context, kret, "krb5_524_conv_principal"); return 1; } if (use_srvtab || srvtab_str) { if (srvtab_str == NULL) srvtab_str = KEYFILE; ret = read_service_key (princ.name, princ.instance, princ.realm, 0, srvtab_str, (char *)&key); if (ret) { warnx ("read_service_key %s: %s", srvtab_str, krb_get_err_text (ret)); return 1; } ret = krb_get_in_tkt (princ.name, princ.instance, princ.realm, KRB_TICKET_GRANTING_TICKET, princ.realm, lifetime, key_to_key, NULL, key); } else { ret = krb_get_pw_in_tkt(princ.name, princ.instance, princ.realm, KRB_TICKET_GRANTING_TICKET, princ.realm, lifetime, passwd); } memset (key, 0, sizeof(key)); if (ret) { warnx ("%s", krb_get_err_text(ret)); return 1; } if (do_afslog && k_hasafs()) { if ((ret = krb_afslog(NULL, NULL)) != 0 && ret != KDC_PR_UNKNOWN) { if(ret > 0) warnx ("%s", krb_get_err_text(ret)); else warnx ("failed to store AFS token"); } } return 0; } /* * the special version of get_default_principal that takes v4 into account */ static krb5_error_code kinit_get_default_principal (krb5_context context, krb5_principal *princ) { krb5_error_code ret; krb5_ccache id; krb_principal v4_princ; int kret; ret = krb5_cc_default (context, &id); if (ret == 0) { ret = krb5_cc_get_principal (context, id, princ); krb5_cc_close (context, id); if (ret == 0) return 0; } kret = krb_get_tf_fullname (tkt_string(), v4_princ.name, v4_princ.instance, v4_princ.realm); if (kret == KSUCCESS) { ret = krb5_425_conv_principal (context, v4_princ.name, v4_princ.instance, v4_princ.realm, princ); if (ret == 0) return 0; } return krb5_get_default_principal (context, princ); } #else /* !KRB4 */ static krb5_error_code kinit_get_default_principal (krb5_context context, krb5_principal *princ) { return krb5_get_default_principal (context, princ); } #endif /* !KRB4 */ static krb5_error_code get_server(krb5_context context, krb5_principal client, const char *server, krb5_principal *princ) { krb5_realm *client_realm; if(server) return krb5_parse_name(context, server, princ); client_realm = krb5_princ_realm (context, client); return krb5_make_principal(context, princ, *client_realm, KRB5_TGS_NAME, *client_realm, NULL); } #ifdef KRB4 static krb5_error_code do_524init(krb5_context context, krb5_ccache ccache, krb5_creds *creds, const char *server) { krb5_error_code ret; CREDENTIALS c; krb5_creds in_creds, *real_creds; if(creds != NULL) real_creds = creds; else { krb5_principal client; krb5_cc_get_principal(context, ccache, &client); memset(&in_creds, 0, sizeof(in_creds)); ret = get_server(context, client, server, &in_creds.server); if(ret) { krb5_free_principal(context, client); return ret; } in_creds.client = client; ret = krb5_get_credentials(context, 0, ccache, &in_creds, &real_creds); krb5_free_principal(context, client); krb5_free_principal(context, in_creds.server); if(ret) return ret; } ret = krb524_convert_creds_kdc_ccache(context, ccache, real_creds, &c); if(ret) krb5_warn(context, ret, "converting creds"); else { int tret = tf_setup(&c, c.pname, c.pinst); if(tret) krb5_warnx(context, "saving v4 creds: %s", krb_get_err_text(tret)); } if(creds == NULL) krb5_free_creds(context, real_creds); memset(&c, 0, sizeof(c)); return ret; } #endif static int renew_validate(krb5_context context, int renew, int validate, krb5_ccache cache, const char *server, krb5_deltat life) { krb5_error_code ret; krb5_creds in, *out; krb5_kdc_flags flags; memset(&in, 0, sizeof(in)); ret = krb5_cc_get_principal(context, cache, &in.client); if(ret) { krb5_warn(context, ret, "krb5_cc_get_principal"); return ret; } ret = get_server(context, in.client, server, &in.server); if(ret) { krb5_warn(context, ret, "get_server"); goto out; } flags.i = 0; flags.b.renewable = flags.b.renew = renew; flags.b.validate = validate; if (forwardable_flag != -1) flags.b.forwardable = forwardable_flag; if (proxiable_flag != -1) flags.b.proxiable = proxiable_flag; if (anonymous_flag != -1) flags.b.request_anonymous = anonymous_flag; if(life) in.times.endtime = time(NULL) + life; ret = krb5_get_kdc_cred(context, cache, flags, NULL, NULL, &in, &out); if(ret) { krb5_warn(context, ret, "krb5_get_kdc_cred"); goto out; } ret = krb5_cc_initialize(context, cache, in.client); if(ret) { krb5_free_creds (context, out); krb5_warn(context, ret, "krb5_cc_initialize"); goto out; } ret = krb5_cc_store_cred(context, cache, out); if(ret == 0 && server == NULL) { #ifdef KRB4 /* only do this if it's a general renew-my-tgt request */ if(get_v4_tgt) do_524init(context, cache, out, NULL); #endif if(do_afslog && k_hasafs()) krb5_afslog(context, cache, NULL, NULL); } krb5_free_creds (context, out); if(ret) { krb5_warn(context, ret, "krb5_cc_store_cred"); goto out; } out: krb5_free_creds_contents(context, &in); return ret; } static krb5_error_code get_new_tickets(krb5_context context, krb5_principal principal, krb5_ccache ccache, krb5_deltat ticket_life) { krb5_error_code ret; krb5_get_init_creds_opt opt; krb5_addresses no_addrs; krb5_creds cred; char passwd[256]; krb5_deltat start_time = 0; krb5_deltat renew = 0; memset(&cred, 0, sizeof(cred)); krb5_get_init_creds_opt_init (&opt); krb5_get_init_creds_opt_set_default_flags(context, "kinit", /* XXX */principal->realm, &opt); if(forwardable_flag != -1) krb5_get_init_creds_opt_set_forwardable (&opt, forwardable_flag); if(proxiable_flag != -1) krb5_get_init_creds_opt_set_proxiable (&opt, proxiable_flag); if(anonymous_flag != -1) krb5_get_init_creds_opt_set_anonymous (&opt, anonymous_flag); if (!addrs_flag) { no_addrs.len = 0; no_addrs.val = NULL; krb5_get_init_creds_opt_set_address_list (&opt, &no_addrs); } if (renew_life == NULL && renewable_flag) renew_life = "1 month"; if(renew_life) { renew = parse_time (renew_life, "s"); if (renew < 0) errx (1, "unparsable time: %s", renew_life); krb5_get_init_creds_opt_set_renew_life (&opt, renew); } if(ticket_life != 0) krb5_get_init_creds_opt_set_tkt_life (&opt, ticket_life); if(start_str) { int tmp = parse_time (start_str, "s"); if (tmp < 0) errx (1, "unparsable time: %s", start_str); start_time = tmp; } if(etype_str.num_strings) { krb5_enctype *enctype = NULL; int i; enctype = malloc(etype_str.num_strings * sizeof(*enctype)); if(enctype == NULL) errx(1, "out of memory"); for(i = 0; i < etype_str.num_strings; i++) { ret = krb5_string_to_enctype(context, etype_str.strings[i], &enctype[i]); if(ret) errx(1, "unrecognized enctype: %s", etype_str.strings[i]); } krb5_get_init_creds_opt_set_etype_list(&opt, enctype, etype_str.num_strings); } if(use_keytab || keytab_str) { krb5_keytab kt; if(keytab_str) ret = krb5_kt_resolve(context, keytab_str, &kt); else ret = krb5_kt_default(context, &kt); if (ret) krb5_err (context, 1, ret, "resolving keytab"); ret = krb5_get_init_creds_keytab (context, &cred, principal, kt, start_time, server, &opt); krb5_kt_close(context, kt); } else { char *p, *prompt; krb5_unparse_name (context, principal, &p); asprintf (&prompt, "%s's Password: ", p); free (p); if (des_read_pw_string(passwd, sizeof(passwd)-1, prompt, 0)){ memset(passwd, 0, sizeof(passwd)); exit(1); } free (prompt); ret = krb5_get_init_creds_password (context, &cred, principal, passwd, krb5_prompter_posix, NULL, start_time, server, &opt); } #ifdef KRB4 if (ret == KRB5KRB_AP_ERR_V4_REPLY || ret == KRB5_KDC_UNREACH) { int exit_val; exit_val = do_v4_fallback (context, principal, ticket_life, use_keytab, keytab_str, passwd); get_v4_tgt = 0; do_afslog = 0; memset(passwd, 0, sizeof(passwd)); if (exit_val == 0 || ret == KRB5KRB_AP_ERR_V4_REPLY) return exit_val; } #endif memset(passwd, 0, sizeof(passwd)); switch(ret){ case 0: break; case KRB5_LIBOS_PWDINTR: /* don't print anything if it was just C-c:ed */ exit(1); case KRB5KRB_AP_ERR_BAD_INTEGRITY: case KRB5KRB_AP_ERR_MODIFIED: krb5_errx(context, 1, "Password incorrect"); break; default: krb5_err(context, 1, ret, "krb5_get_init_creds"); } if(ticket_life != 0) { if(abs(cred.times.endtime - cred.times.starttime - ticket_life) > 30) { char life[32]; unparse_time(cred.times.endtime - cred.times.starttime, life, sizeof(life)); krb5_warnx(context, "NOTICE: ticket lifetime is %s", life); } } if(renew != 0) { if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) { char life[32]; unparse_time(cred.times.renew_till - cred.times.starttime, life, sizeof(life)); krb5_warnx(context, "NOTICE: ticket renewable lifetime is %s", life); } } ret = krb5_cc_initialize (context, ccache, cred.client); if (ret) krb5_err (context, 1, ret, "krb5_cc_initialize"); ret = krb5_cc_store_cred (context, ccache, &cred); if (ret) krb5_err (context, 1, ret, "krb5_cc_store_cred"); krb5_free_creds_contents (context, &cred); return 0; } int main (int argc, char **argv) { krb5_error_code ret; krb5_context context; krb5_ccache ccache; krb5_principal principal; int optind = 0; krb5_deltat ticket_life = 0; setprogname (argv[0]); ret = krb5_init_context (&context); if (ret) errx(1, "krb5_init_context failed: %d", ret); if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optind)) usage(1); if (help_flag) usage (0); if(version_flag) { print_version(NULL); exit(0); } argc -= optind; argv += optind; if (argv[0]) { ret = krb5_parse_name (context, argv[0], &principal); if (ret) krb5_err (context, 1, ret, "krb5_parse_name"); } else { ret = kinit_get_default_principal (context, &principal); if (ret) krb5_err (context, 1, ret, "krb5_get_default_principal"); } if(fcache_version) krb5_set_fcache_version(context, fcache_version); if(cred_cache) ret = krb5_cc_resolve(context, cred_cache, &ccache); else { if(argc > 1) { char s[1024]; ret = krb5_cc_gen_new(context, &krb5_fcc_ops, &ccache); if(ret) krb5_err(context, 1, ret, "creating cred cache"); snprintf(s, sizeof(s), "%s:%s", krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache)); setenv("KRB5CCNAME", s, 1); #ifdef KRB4 { int fd; snprintf(s, sizeof(s), "%s_XXXXXX", TKT_ROOT); if((fd = mkstemp(s)) >= 0) { close(fd); setenv("KRBTKFILE", s, 1); } } #endif } else ret = krb5_cc_default (context, &ccache); } if (ret) krb5_err (context, 1, ret, "resolving credentials cache"); if (argc > 1 && k_hasafs ()) k_setpag(); if (lifetime) { int tmp = parse_time (lifetime, "s"); if (tmp < 0) errx (1, "unparsable time: %s", lifetime); ticket_life = tmp; } #ifdef KRB4 if(get_v4_tgt == -1) krb5_appdefault_boolean(context, "kinit", krb5_principal_get_realm(context, principal), "krb4_get_tickets", TRUE, &get_v4_tgt); #endif if(do_afslog == -1) krb5_appdefault_boolean(context, "kinit", krb5_principal_get_realm(context, principal), "afslog", TRUE, &do_afslog); if(!addrs_flag && extra_addresses.num_strings > 0) krb5_errx(context, 1, "specifying both extra addresses and " "no addresses makes no sense"); { int i; krb5_addresses addresses; memset(&addresses, 0, sizeof(addresses)); for(i = 0; i < extra_addresses.num_strings; i++) { ret = krb5_parse_address(context, extra_addresses.strings[i], &addresses); if (ret == 0) { krb5_add_extra_addresses(context, &addresses); krb5_free_addresses(context, &addresses); } } free_getarg_strings(&extra_addresses); } if(renew_flag || validate_flag) { ret = renew_validate(context, renew_flag, validate_flag, ccache, server, ticket_life); exit(ret != 0); } #ifdef KRB4 if(!convert_524) #endif get_new_tickets(context, principal, ccache, ticket_life); #ifdef KRB4 if(get_v4_tgt) do_524init(context, ccache, NULL, server); #endif if(do_afslog && k_hasafs()) krb5_afslog(context, ccache, NULL, NULL); if(argc > 1) { ret = simple_execvp(argv[1], argv+1); krb5_cc_destroy(context, ccache); #ifdef KRB4 dest_tkt(); #endif if(k_hasafs()) k_unlog(); } else { krb5_cc_close (context, ccache); ret = 0; } krb5_free_principal(context, principal); krb5_free_context (context); return ret; }