17c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 27c478bd9Sstevel@tonic-gate /* 37c478bd9Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 47c478bd9Sstevel@tonic-gate * Use is subject to license terms. 57c478bd9Sstevel@tonic-gate */ 67c478bd9Sstevel@tonic-gate 77c478bd9Sstevel@tonic-gate #include <k5-int.h> 8*505d05c7Sgtb #include "int-proto.h" 97c478bd9Sstevel@tonic-gate 107c478bd9Sstevel@tonic-gate extern krb5_error_code krb5_libdefault_boolean(); 117c478bd9Sstevel@tonic-gate 127c478bd9Sstevel@tonic-gate static krb5_error_code 13*505d05c7Sgtb krb5_cc_copy_creds_except(krb5_context context, krb5_ccache incc, krb5_ccache outcc, krb5_principal princ) 147c478bd9Sstevel@tonic-gate { 157c478bd9Sstevel@tonic-gate krb5_error_code code; 167c478bd9Sstevel@tonic-gate krb5_flags flags; 177c478bd9Sstevel@tonic-gate krb5_cc_cursor cur; 187c478bd9Sstevel@tonic-gate krb5_creds creds; 197c478bd9Sstevel@tonic-gate 207c478bd9Sstevel@tonic-gate flags = 0; /* turns off OPENCLOSE mode */ 217c478bd9Sstevel@tonic-gate if ((code = krb5_cc_set_flags(context, incc, flags)) != NULL) 227c478bd9Sstevel@tonic-gate return(code); 237c478bd9Sstevel@tonic-gate if ((code = krb5_cc_set_flags(context, outcc, flags)) != NULL) 247c478bd9Sstevel@tonic-gate return(code); 257c478bd9Sstevel@tonic-gate 267c478bd9Sstevel@tonic-gate if ((code = krb5_cc_start_seq_get(context, incc, &cur)) != NULL) 277c478bd9Sstevel@tonic-gate goto cleanup; 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate while ((code = krb5_cc_next_cred(context, incc, &cur, &creds)) == NULL) { 307c478bd9Sstevel@tonic-gate if (krb5_principal_compare(context, princ, creds.server)) 317c478bd9Sstevel@tonic-gate continue; 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate code = krb5_cc_store_cred(context, outcc, &creds); 347c478bd9Sstevel@tonic-gate krb5_free_cred_contents(context, &creds); 357c478bd9Sstevel@tonic-gate if (code) 367c478bd9Sstevel@tonic-gate goto cleanup; 377c478bd9Sstevel@tonic-gate } 387c478bd9Sstevel@tonic-gate 397c478bd9Sstevel@tonic-gate if (code != KRB5_CC_END) 407c478bd9Sstevel@tonic-gate goto cleanup; 417c478bd9Sstevel@tonic-gate 427c478bd9Sstevel@tonic-gate code = 0; 437c478bd9Sstevel@tonic-gate 447c478bd9Sstevel@tonic-gate cleanup: 457c478bd9Sstevel@tonic-gate flags = KRB5_TC_OPENCLOSE; 467c478bd9Sstevel@tonic-gate 477c478bd9Sstevel@tonic-gate if (code) 487c478bd9Sstevel@tonic-gate (void) krb5_cc_set_flags(context, incc, flags); 497c478bd9Sstevel@tonic-gate else 507c478bd9Sstevel@tonic-gate code = krb5_cc_set_flags(context, incc, flags); 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate if (code) 537c478bd9Sstevel@tonic-gate (void) krb5_cc_set_flags(context, outcc, flags); 547c478bd9Sstevel@tonic-gate else 557c478bd9Sstevel@tonic-gate code = krb5_cc_set_flags(context, outcc, flags); 567c478bd9Sstevel@tonic-gate 577c478bd9Sstevel@tonic-gate return(code); 587c478bd9Sstevel@tonic-gate } 597c478bd9Sstevel@tonic-gate 60*505d05c7Sgtb krb5_error_code KRB5_CALLCONV 617c478bd9Sstevel@tonic-gate krb5_verify_init_creds(krb5_context context, 627c478bd9Sstevel@tonic-gate krb5_creds *creds, 637c478bd9Sstevel@tonic-gate krb5_principal server_arg, 647c478bd9Sstevel@tonic-gate krb5_keytab keytab_arg, 657c478bd9Sstevel@tonic-gate krb5_ccache *ccache_arg, 667c478bd9Sstevel@tonic-gate krb5_verify_init_creds_opt *options) 677c478bd9Sstevel@tonic-gate { 687c478bd9Sstevel@tonic-gate krb5_error_code ret; 697c478bd9Sstevel@tonic-gate krb5_principal server; 707c478bd9Sstevel@tonic-gate krb5_keytab keytab; 717c478bd9Sstevel@tonic-gate krb5_ccache ccache; 727c478bd9Sstevel@tonic-gate krb5_keytab_entry kte; 737c478bd9Sstevel@tonic-gate krb5_creds in_creds, *out_creds; 747c478bd9Sstevel@tonic-gate krb5_auth_context authcon; 757c478bd9Sstevel@tonic-gate krb5_data ap_req; 767c478bd9Sstevel@tonic-gate 777c478bd9Sstevel@tonic-gate /* KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN */ 787c478bd9Sstevel@tonic-gate 797c478bd9Sstevel@tonic-gate server = NULL; 807c478bd9Sstevel@tonic-gate keytab = NULL; 817c478bd9Sstevel@tonic-gate ccache = NULL; 827c478bd9Sstevel@tonic-gate out_creds = NULL; 837c478bd9Sstevel@tonic-gate authcon = NULL; 847c478bd9Sstevel@tonic-gate ap_req.data = NULL; 857c478bd9Sstevel@tonic-gate 867c478bd9Sstevel@tonic-gate if (server_arg) { 877c478bd9Sstevel@tonic-gate server = server_arg; 887c478bd9Sstevel@tonic-gate } else { 89*505d05c7Sgtb if ((ret = krb5_sname_to_principal(context, NULL, NULL, 90*505d05c7Sgtb KRB5_NT_SRV_HST, &server))) { 917c478bd9Sstevel@tonic-gate goto cleanup; 927c478bd9Sstevel@tonic-gate } else { 937c478bd9Sstevel@tonic-gate /* 947c478bd9Sstevel@tonic-gate * Solaris Kerberos: 957c478bd9Sstevel@tonic-gate * We check first up to see whether 'verify_ap_req_fail' is 967c478bd9Sstevel@tonic-gate * set to false, because if FALSE there is no point in 977c478bd9Sstevel@tonic-gate * proceeding any further with the strict TGT verification check 987c478bd9Sstevel@tonic-gate * for the 'host/fqdn' service principal in the local keytab. 997c478bd9Sstevel@tonic-gate */ 1007c478bd9Sstevel@tonic-gate int nofail; 1017c478bd9Sstevel@tonic-gate if (krb5_libdefault_boolean(context, 1027c478bd9Sstevel@tonic-gate &creds->client->realm, 1037c478bd9Sstevel@tonic-gate "verify_ap_req_nofail", 1047c478bd9Sstevel@tonic-gate &nofail) == 0) { 1057c478bd9Sstevel@tonic-gate /* 1067c478bd9Sstevel@tonic-gate * Solaris Kerberos: 1077c478bd9Sstevel@tonic-gate * If the administrator has configured the system such 1087c478bd9Sstevel@tonic-gate * that its OK to fail this strict TGT verification check 1097c478bd9Sstevel@tonic-gate * (i.e. verify_ap_req_nofail = false), set the 1107c478bd9Sstevel@tonic-gate * 'ret' code to 0 and cleanup. 1117c478bd9Sstevel@tonic-gate */ 1127c478bd9Sstevel@tonic-gate if (!nofail) { 1137c478bd9Sstevel@tonic-gate ret = 0; 1147c478bd9Sstevel@tonic-gate goto cleanup; 1157c478bd9Sstevel@tonic-gate } 1167c478bd9Sstevel@tonic-gate } 1177c478bd9Sstevel@tonic-gate } 1187c478bd9Sstevel@tonic-gate } 1197c478bd9Sstevel@tonic-gate 1207c478bd9Sstevel@tonic-gate /* first, check if the server is in the keytab. If not, there's 1217c478bd9Sstevel@tonic-gate no reason to continue. rd_req does all this, but there's 1227c478bd9Sstevel@tonic-gate no way to know that a given error is caused by a missing 1237c478bd9Sstevel@tonic-gate keytab or key, and not by some other problem. */ 1247c478bd9Sstevel@tonic-gate 1257c478bd9Sstevel@tonic-gate if (keytab_arg) { 1267c478bd9Sstevel@tonic-gate keytab = keytab_arg; 1277c478bd9Sstevel@tonic-gate } else { 128*505d05c7Sgtb if ((ret = krb5_kt_default(context, &keytab))) 1297c478bd9Sstevel@tonic-gate goto cleanup; 1307c478bd9Sstevel@tonic-gate } 1317c478bd9Sstevel@tonic-gate 1327c478bd9Sstevel@tonic-gate if ((ret = krb5_kt_get_entry(context, keytab, server, 0, 0, &kte)) != NULL) { 1337c478bd9Sstevel@tonic-gate /* this means there is no keying material. This is ok, as long as 1347c478bd9Sstevel@tonic-gate it is not prohibited by the configuration */ 1357c478bd9Sstevel@tonic-gate if (options && 1367c478bd9Sstevel@tonic-gate (options->flags & KRB5_VERIFY_INIT_CREDS_OPT_AP_REQ_NOFAIL)) { 1377c478bd9Sstevel@tonic-gate if (options->ap_req_nofail) 1387c478bd9Sstevel@tonic-gate goto cleanup; 1397c478bd9Sstevel@tonic-gate } 1407c478bd9Sstevel@tonic-gate } 1417c478bd9Sstevel@tonic-gate 1427c478bd9Sstevel@tonic-gate krb5_kt_free_entry(context, &kte); 1437c478bd9Sstevel@tonic-gate 1447c478bd9Sstevel@tonic-gate /* If the creds are for the server principal, we're set, just do 1457c478bd9Sstevel@tonic-gate a mk_req. Otherwise, do a get_credentials first. */ 1467c478bd9Sstevel@tonic-gate 1477c478bd9Sstevel@tonic-gate if (krb5_principal_compare(context, server, creds->server)) { 1487c478bd9Sstevel@tonic-gate /* make an ap_req */ 149*505d05c7Sgtb if ((ret = krb5_mk_req_extended(context, &authcon, 0, NULL, creds, 150*505d05c7Sgtb &ap_req))) 1517c478bd9Sstevel@tonic-gate goto cleanup; 1527c478bd9Sstevel@tonic-gate } else { 1537c478bd9Sstevel@tonic-gate /* this is unclean, but it's the easiest way without ripping the 1547c478bd9Sstevel@tonic-gate library into very small pieces. store the client's initial cred 1557c478bd9Sstevel@tonic-gate in a memory ccache, then call the library. Later, we'll copy 1567c478bd9Sstevel@tonic-gate everything except the initial cred into the ccache we return to 1577c478bd9Sstevel@tonic-gate the user. A clean implementation would involve library 1587c478bd9Sstevel@tonic-gate internals with a coherent idea of "in" and "out". */ 1597c478bd9Sstevel@tonic-gate 1607c478bd9Sstevel@tonic-gate /* insert the initial cred into the ccache */ 1617c478bd9Sstevel@tonic-gate 162*505d05c7Sgtb if ((ret = krb5_cc_resolve(context, "MEMORY:rd_req", &ccache))) 1637c478bd9Sstevel@tonic-gate goto cleanup; 1647c478bd9Sstevel@tonic-gate 1657c478bd9Sstevel@tonic-gate if ((ret = krb5_cc_initialize(context, ccache, creds->client)) != NULL) 1667c478bd9Sstevel@tonic-gate goto cleanup; 1677c478bd9Sstevel@tonic-gate 1687c478bd9Sstevel@tonic-gate if ((ret = krb5_cc_store_cred(context, ccache, creds)) != NULL) 1697c478bd9Sstevel@tonic-gate goto cleanup; 1707c478bd9Sstevel@tonic-gate 1717c478bd9Sstevel@tonic-gate /* set up for get_creds */ 1727c478bd9Sstevel@tonic-gate memset(&in_creds, 0, sizeof(in_creds)); 1737c478bd9Sstevel@tonic-gate in_creds.client = creds->client; 1747c478bd9Sstevel@tonic-gate in_creds.server = server; 175*505d05c7Sgtb if ((ret = krb5_timeofday(context, &in_creds.times.endtime))) 1767c478bd9Sstevel@tonic-gate goto cleanup; 1777c478bd9Sstevel@tonic-gate in_creds.times.endtime += 5*60; 1787c478bd9Sstevel@tonic-gate 179*505d05c7Sgtb if ((ret = krb5_get_credentials(context, 0, ccache, &in_creds, 180*505d05c7Sgtb &out_creds))) 1817c478bd9Sstevel@tonic-gate goto cleanup; 1827c478bd9Sstevel@tonic-gate 1837c478bd9Sstevel@tonic-gate /* make an ap_req */ 184*505d05c7Sgtb if ((ret = krb5_mk_req_extended(context, &authcon, 0, NULL, out_creds, 185*505d05c7Sgtb &ap_req))) 1867c478bd9Sstevel@tonic-gate goto cleanup; 1877c478bd9Sstevel@tonic-gate } 1887c478bd9Sstevel@tonic-gate 1897c478bd9Sstevel@tonic-gate /* wipe the auth context for mk_req */ 1907c478bd9Sstevel@tonic-gate if (authcon) { 1917c478bd9Sstevel@tonic-gate krb5_auth_con_free(context, authcon); 1927c478bd9Sstevel@tonic-gate authcon = NULL; 1937c478bd9Sstevel@tonic-gate } 1947c478bd9Sstevel@tonic-gate 1957c478bd9Sstevel@tonic-gate /* verify the ap_req */ 1967c478bd9Sstevel@tonic-gate 197*505d05c7Sgtb if ((ret = krb5_rd_req(context, &authcon, &ap_req, server, keytab, 198*505d05c7Sgtb NULL, NULL))) 1997c478bd9Sstevel@tonic-gate goto cleanup; 2007c478bd9Sstevel@tonic-gate 2017c478bd9Sstevel@tonic-gate /* if we get this far, then the verification succeeded. We can 2027c478bd9Sstevel@tonic-gate still fail if the library stuff here fails, but that's it */ 2037c478bd9Sstevel@tonic-gate 2047c478bd9Sstevel@tonic-gate if (ccache_arg && ccache) { 2057c478bd9Sstevel@tonic-gate if (*ccache_arg == NULL) { 2067c478bd9Sstevel@tonic-gate krb5_ccache retcc; 2077c478bd9Sstevel@tonic-gate 2087c478bd9Sstevel@tonic-gate retcc = NULL; 2097c478bd9Sstevel@tonic-gate 2107c478bd9Sstevel@tonic-gate if (((ret = krb5_cc_resolve(context, "MEMORY:rd_req2", &retcc)) != NULL) || 2117c478bd9Sstevel@tonic-gate ((ret = krb5_cc_initialize(context, retcc, creds->client)) != NULL) || 2127c478bd9Sstevel@tonic-gate ((ret = krb5_cc_copy_creds_except(context, ccache, retcc, 2137c478bd9Sstevel@tonic-gate creds->server)) != NULL)) { 2147c478bd9Sstevel@tonic-gate if (retcc) 2157c478bd9Sstevel@tonic-gate (void) krb5_cc_destroy(context, retcc); 2167c478bd9Sstevel@tonic-gate } else { 2177c478bd9Sstevel@tonic-gate *ccache_arg = retcc; 2187c478bd9Sstevel@tonic-gate } 2197c478bd9Sstevel@tonic-gate } else { 2207c478bd9Sstevel@tonic-gate ret = krb5_cc_copy_creds_except(context, ccache, *ccache_arg, 2217c478bd9Sstevel@tonic-gate server); 2227c478bd9Sstevel@tonic-gate } 2237c478bd9Sstevel@tonic-gate } 2247c478bd9Sstevel@tonic-gate 2257c478bd9Sstevel@tonic-gate /* if any of the above paths returned an errors, then ret is set 2267c478bd9Sstevel@tonic-gate accordingly. either that, or it's zero, which is fine, too */ 2277c478bd9Sstevel@tonic-gate 2287c478bd9Sstevel@tonic-gate cleanup: 2297c478bd9Sstevel@tonic-gate if (!server_arg && server) 2307c478bd9Sstevel@tonic-gate krb5_free_principal(context, server); 2317c478bd9Sstevel@tonic-gate if (!keytab_arg && keytab) 2327c478bd9Sstevel@tonic-gate (void) krb5_kt_close(context, keytab); 2337c478bd9Sstevel@tonic-gate if (ccache) 2347c478bd9Sstevel@tonic-gate (void) krb5_cc_destroy(context, ccache); 2357c478bd9Sstevel@tonic-gate if (out_creds) 2367c478bd9Sstevel@tonic-gate krb5_free_creds(context, out_creds); 2377c478bd9Sstevel@tonic-gate if (authcon) 2387c478bd9Sstevel@tonic-gate krb5_auth_con_free(context, authcon); 2397c478bd9Sstevel@tonic-gate if (ap_req.data) 2407c478bd9Sstevel@tonic-gate krb5_xfree(ap_req.data); 2417c478bd9Sstevel@tonic-gate 2427c478bd9Sstevel@tonic-gate return(ret); 2437c478bd9Sstevel@tonic-gate } 244