/* * Copyright (c) 1997-2006 Kungliga Tekniska H�gskolan * (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 21483 2007-07-10 16:40:46Z lha $"); #include "krb5-v4compat.h" #include "heimntlm.h" int forwardable_flag = -1; int proxiable_flag = -1; int renewable_flag = -1; int renew_flag = 0; int pac_flag = -1; 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_str = 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; int get_v4_tgt = -1; int convert_524 = 0; int fcache_version; char *password_file = NULL; char *pk_user_id = NULL; char *pk_x509_anchors = NULL; int pk_use_enckey = 0; static int canonicalize_flag = 0; static char *ntlm_domain; static char *krb4_cc_name; static struct getargs args[] = { /* * used by MIT * a: ~A * V: verbose * F: ~f * P: ~p * C: v4 cache name? * 5: */ { "524init", '4', arg_flag, &get_v4_tgt, "obtain version 4 TGT" }, { "524convert", '9', arg_flag, &convert_524, "only convert ticket to version 4" }, { "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_str, "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", 'A', 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" }, { "request-pac", 0, arg_flag, &pac_flag, "request a Windows PAC" }, { "password-file", 0, arg_string, &password_file, "read the password from a file" }, { "canonicalize",0, arg_flag, &canonicalize_flag, "canonicalize client principal" }, #ifdef PKINIT { "pk-user", 'C', arg_string, &pk_user_id, "principal's public/private/certificate identifier", "id" }, { "x509-anchors", 'D', arg_string, &pk_x509_anchors, "directory with CA certificates", "directory" }, { "pk-use-enckey", 0, arg_flag, &pk_use_enckey, "Use RSA encrypted reply (instead of DH)" }, #endif { "ntlm-domain", 0, arg_string, &ntlm_domain, "NTLM domain", "domain" }, { "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); } 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); } static krb5_error_code do_524init(krb5_context context, krb5_ccache ccache, krb5_creds *creds, const char *server) { krb5_error_code ret; struct 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 { krb5_error_code tret = _krb5_krb_tf_setup(context, &c, NULL, 0); if(tret) krb5_warn(context, tret, "saving v4 creds"); } if(creds == NULL) krb5_free_creds(context, real_creds); memset(&c, 0, sizeof(c)); return ret; } 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 = NULL; 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; } if (renew) { /* * no need to check the error here, its only to be * friendly to the user */ krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in, &out); } flags.i = 0; flags.b.renewable = flags.b.renew = renew; flags.b.validate = validate; if (forwardable_flag != -1) flags.b.forwardable = forwardable_flag; else if (out) flags.b.forwardable = out->flags.b.forwardable; if (proxiable_flag != -1) flags.b.proxiable = proxiable_flag; else if (out) flags.b.proxiable = out->flags.b.proxiable; if (anonymous_flag != -1) flags.b.request_anonymous = anonymous_flag; if(life) in.times.endtime = time(NULL) + life; if (out) { krb5_free_creds (context, out); out = NULL; } 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) { /* only do this if it's a general renew-my-tgt request */ if(get_v4_tgt) do_524init(context, cache, out, NULL); 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_cred_contents(context, &in); return ret; } static krb5_error_code store_ntlmkey(krb5_context context, krb5_ccache id, const char *domain, krb5_const_principal client, struct ntlm_buf *buf) { krb5_error_code ret; krb5_creds cred; memset(&cred, 0, sizeof(cred)); ret = krb5_make_principal(context, &cred.server, krb5_principal_get_realm(context, client), "@ntlm-key", domain, NULL); if (ret) goto out; ret = krb5_copy_principal(context, client, &cred.client); if (ret) goto out; cred.times.authtime = time(NULL); cred.times.endtime = time(NULL) + 3600 * 24 * 30; /* XXX */ cred.session.keytype = ENCTYPE_ARCFOUR_HMAC_MD5; ret = krb5_data_copy(&cred.session.keyvalue, buf->data, buf->length); if (ret) goto out; ret = krb5_cc_store_cred(context, id, &cred); out: krb5_free_cred_contents (context, &cred); return 0; } static krb5_error_code get_new_tickets(krb5_context context, krb5_principal principal, krb5_ccache ccache, krb5_deltat ticket_life, int interactive) { krb5_error_code ret; krb5_get_init_creds_opt *opt; krb5_creds cred; char passwd[256]; krb5_deltat start_time = 0; krb5_deltat renew = 0; char *renewstr = NULL; krb5_enctype *enctype = NULL; struct ntlm_buf ntlmkey; memset(&ntlmkey, 0, sizeof(ntlmkey)); passwd[0] = '\0'; if (password_file) { FILE *f; if (strcasecmp("STDIN", password_file) == 0) f = stdin; else f = fopen(password_file, "r"); if (f == NULL) krb5_errx(context, 1, "Failed to open the password file %s", password_file); if (fgets(passwd, sizeof(passwd), f) == NULL) krb5_errx(context, 1, "Failed to read password from file %s", password_file); if (f != stdin) fclose(f); passwd[strcspn(passwd, "\n")] = '\0'; } memset(&cred, 0, sizeof(cred)); ret = krb5_get_init_creds_opt_alloc (context, &opt); if (ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_alloc"); krb5_get_init_creds_opt_set_default_flags(context, "kinit", krb5_principal_get_realm(context, principal), 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 (pac_flag != -1) krb5_get_init_creds_opt_set_pac_request(context, opt, pac_flag ? TRUE : FALSE); if (canonicalize_flag) krb5_get_init_creds_opt_set_canonicalize(context, opt, TRUE); if (pk_user_id) { ret = krb5_get_init_creds_opt_set_pkinit(context, opt, principal, pk_user_id, pk_x509_anchors, NULL, NULL, pk_use_enckey ? 2 : 0, krb5_prompter_posix, NULL, passwd); if (ret) krb5_err(context, 1, ret, "krb5_get_init_creds_opt_set_pkinit"); } if (addrs_flag != -1) krb5_get_init_creds_opt_set_addressless(context, opt, addrs_flag ? FALSE : TRUE); if (renew_life == NULL && renewable_flag) renewstr = "1 month"; if (renew_life) renewstr = renew_life; if (renewstr) { renew = parse_time (renewstr, "s"); if (renew < 0) errx (1, "unparsable time: %s", renewstr); 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) { 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_str, opt); krb5_kt_close(context, kt); } else if (pk_user_id) { ret = krb5_get_init_creds_password (context, &cred, principal, passwd, krb5_prompter_posix, NULL, start_time, server_str, opt); } else if (!interactive) { krb5_warnx(context, "Not interactive, failed to get initial ticket"); krb5_get_init_creds_opt_free(context, opt); return 0; } else { if (passwd[0] == '\0') { char *p, *prompt; krb5_unparse_name (context, principal, &p); asprintf (&prompt, "%s's Password: ", p); free (p); if (UI_UTIL_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_str, opt); } krb5_get_init_creds_opt_free(context, opt); if (ntlm_domain && passwd[0]) heim_ntlm_nt_key(passwd, &ntlmkey); 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: case KRB5KDC_ERR_PREAUTH_FAILED: krb5_errx(context, 1, "Password incorrect"); break; case KRB5KRB_AP_ERR_V4_REPLY: krb5_errx(context, 1, "Looks like a Kerberos 4 reply"); 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[64]; unparse_time_approx(cred.times.endtime - cred.times.starttime, life, sizeof(life)); krb5_warnx(context, "NOTICE: ticket lifetime is %s", life); } } if(renew_life) { if(abs(cred.times.renew_till - cred.times.starttime - renew) > 30) { char life[64]; unparse_time_approx(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_cred_contents (context, &cred); if (ntlm_domain && ntlmkey.data) store_ntlmkey(context, ccache, ntlm_domain, principal, &ntlmkey); if (enctype) free(enctype); return 0; } static time_t ticket_lifetime(krb5_context context, krb5_ccache cache, krb5_principal client, const char *server) { krb5_creds in_cred, *cred; krb5_error_code ret; time_t timeout; memset(&in_cred, 0, sizeof(in_cred)); ret = krb5_cc_get_principal(context, cache, &in_cred.client); if(ret) { krb5_warn(context, ret, "krb5_cc_get_principal"); return 0; } ret = get_server(context, in_cred.client, server, &in_cred.server); if(ret) { krb5_free_principal(context, in_cred.client); krb5_warn(context, ret, "get_server"); return 0; } ret = krb5_get_credentials(context, KRB5_GC_CACHED, cache, &in_cred, &cred); krb5_free_principal(context, in_cred.client); krb5_free_principal(context, in_cred.server); if(ret) { krb5_warn(context, ret, "krb5_get_credentials"); return 0; } timeout = cred->times.endtime - cred->times.starttime; if (timeout < 0) timeout = 0; krb5_free_creds(context, cred); return timeout; } struct renew_ctx { krb5_context context; krb5_ccache ccache; krb5_principal principal; krb5_deltat ticket_life; }; static time_t renew_func(void *ptr) { struct renew_ctx *ctx = ptr; krb5_error_code ret; time_t expire; int new_tickets = 0; if (renewable_flag) { ret = renew_validate(ctx->context, renewable_flag, validate_flag, ctx->ccache, server_str, ctx->ticket_life); if (ret) new_tickets = 1; } else new_tickets = 1; if (new_tickets) get_new_tickets(ctx->context, ctx->principal, ctx->ccache, ctx->ticket_life, 0); if(get_v4_tgt || convert_524) do_524init(ctx->context, ctx->ccache, NULL, server_str); if(do_afslog && k_hasafs()) krb5_afslog(ctx->context, ctx->ccache, NULL, NULL); expire = ticket_lifetime(ctx->context, ctx->ccache, ctx->principal, server_str) / 2; return expire + 1; } int main (int argc, char **argv) { krb5_error_code ret; krb5_context context; krb5_ccache ccache; krb5_principal principal; int optidx = 0; krb5_deltat ticket_life = 0; int parseflags = 0; setprogname (argv[0]); ret = krb5_init_context (&context); if (ret == KRB5_CONFIG_BADFORMAT) errx (1, "krb5_init_context failed to parse configuration file"); else if (ret) errx(1, "krb5_init_context failed: %d", ret); if(getarg(args, sizeof(args) / sizeof(args[0]), argc, argv, &optidx)) usage(1); if (help_flag) usage (0); if(version_flag) { print_version(NULL); exit(0); } argc -= optidx; argv += optidx; if (canonicalize_flag) parseflags |= KRB5_PRINCIPAL_PARSE_ENTERPRISE; if (argv[0]) { ret = krb5_parse_name_flags (context, argv[0], parseflags, &principal); if (ret) krb5_err (context, 1, ret, "krb5_parse_name"); } else { ret = krb5_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(renewable_flag == -1) /* this seems somewhat pointless, but whatever */ krb5_appdefault_boolean(context, "kinit", krb5_principal_get_realm(context, principal), "renewable", FALSE, &renewable_flag); if(get_v4_tgt == -1) krb5_appdefault_boolean(context, "kinit", krb5_principal_get_realm(context, principal), "krb4_get_tickets", FALSE, &get_v4_tgt); if(do_afslog == -1) krb5_appdefault_boolean(context, "kinit", krb5_principal_get_realm(context, principal), "afslog", TRUE, &do_afslog); 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); if (get_v4_tgt) { int fd; if (asprintf(&krb4_cc_name, "%s_XXXXXX", TKT_ROOT) < 0) krb5_errx(context, 1, "out of memory"); if((fd = mkstemp(krb4_cc_name)) >= 0) { close(fd); setenv("KRBTKFILE", krb4_cc_name, 1); } else { free(krb4_cc_name); krb4_cc_name = NULL; } } } 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; } if(addrs_flag == 0 && 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_str, ticket_life); exit(ret != 0); } if(!convert_524) get_new_tickets(context, principal, ccache, ticket_life, 1); if(get_v4_tgt || convert_524) do_524init(context, ccache, NULL, server_str); if(do_afslog && k_hasafs()) krb5_afslog(context, ccache, NULL, NULL); if(argc > 1) { struct renew_ctx ctx; time_t timeout; timeout = ticket_lifetime(context, ccache, principal, server_str) / 2; ctx.context = context; ctx.ccache = ccache; ctx.principal = principal; ctx.ticket_life = ticket_life; ret = simple_execvp_timed(argv[1], argv+1, renew_func, &ctx, timeout); #define EX_NOEXEC 126 #define EX_NOTFOUND 127 if(ret == EX_NOEXEC) krb5_warnx(context, "permission denied: %s", argv[1]); else if(ret == EX_NOTFOUND) krb5_warnx(context, "command not found: %s", argv[1]); krb5_cc_destroy(context, ccache); _krb5_krb_dest_tkt(context, krb4_cc_name); if(k_hasafs()) k_unlog(); } else { krb5_cc_close (context, ccache); ret = 0; } krb5_free_principal(context, principal); krb5_free_context (context); return ret; }