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> 8505d05c7Sgtb #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 13505d05c7Sgtb 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 60505d05c7Sgtb 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 86*5d01ff85Swillf if (server_arg) 877c478bd9Sstevel@tonic-gate server = server_arg; 88*5d01ff85Swillf else if (ret = krb5_sname_to_principal(context, NULL, NULL, 89*5d01ff85Swillf KRB5_NT_SRV_HST, &server)) 907c478bd9Sstevel@tonic-gate goto cleanup; 917c478bd9Sstevel@tonic-gate 927c478bd9Sstevel@tonic-gate /* first, check if the server is in the keytab. If not, there's 937c478bd9Sstevel@tonic-gate no reason to continue. rd_req does all this, but there's 947c478bd9Sstevel@tonic-gate no way to know that a given error is caused by a missing 957c478bd9Sstevel@tonic-gate keytab or key, and not by some other problem. */ 967c478bd9Sstevel@tonic-gate 977c478bd9Sstevel@tonic-gate if (keytab_arg) { 987c478bd9Sstevel@tonic-gate keytab = keytab_arg; 997c478bd9Sstevel@tonic-gate } else { 100*5d01ff85Swillf /* Solaris Kerberos: ignore errors here, deal with below */ 101*5d01ff85Swillf ret = krb5_kt_default(context, &keytab); 1027c478bd9Sstevel@tonic-gate } 1037c478bd9Sstevel@tonic-gate 104*5d01ff85Swillf /* Warning: be very, very careful when modifying the logic here */ 105*5d01ff85Swillf if (keytab == NULL || 106*5d01ff85Swillf (ret = krb5_kt_get_entry(context, keytab, server, 0, 0, &kte))) { 1077c478bd9Sstevel@tonic-gate /* this means there is no keying material. This is ok, as long as 1087c478bd9Sstevel@tonic-gate it is not prohibited by the configuration */ 109*5d01ff85Swillf 110*5d01ff85Swillf int nofail = 1; /* Solaris Kerberos: default return error if keytab problems */ 111*5d01ff85Swillf 1127c478bd9Sstevel@tonic-gate if (options && 1137c478bd9Sstevel@tonic-gate (options->flags & KRB5_VERIFY_INIT_CREDS_OPT_AP_REQ_NOFAIL)) { 114*5d01ff85Swillf /* first, if options are set then use the option value to set nofail */ 115*5d01ff85Swillf nofail = options->ap_req_nofail; 116*5d01ff85Swillf } else { 117*5d01ff85Swillf /* 118*5d01ff85Swillf * Check verify_ap_req_nofail if set in config file. Note this logic 119*5d01ff85Swillf * assumes that krb5_libdefault_boolean will not set nofail to a 120*5d01ff85Swillf * default value if verify_ap_req_nofail is not explictly set in 121*5d01ff85Swillf * config file. Don't care about the return code. 122*5d01ff85Swillf */ 123*5d01ff85Swillf (void) krb5_libdefault_boolean(context, &creds->client->realm, 124*5d01ff85Swillf "verify_ap_req_nofail", 125*5d01ff85Swillf &nofail); 1267c478bd9Sstevel@tonic-gate } 127*5d01ff85Swillf /* Solaris Kerberos: exit without an error ONLY if nofail is false */ 128*5d01ff85Swillf if (!nofail) 129*5d01ff85Swillf ret = 0; 130*5d01ff85Swillf 131*5d01ff85Swillf goto cleanup; 1327c478bd9Sstevel@tonic-gate } 1337c478bd9Sstevel@tonic-gate 1347c478bd9Sstevel@tonic-gate krb5_kt_free_entry(context, &kte); 1357c478bd9Sstevel@tonic-gate 1367c478bd9Sstevel@tonic-gate /* If the creds are for the server principal, we're set, just do 1377c478bd9Sstevel@tonic-gate a mk_req. Otherwise, do a get_credentials first. */ 1387c478bd9Sstevel@tonic-gate 1397c478bd9Sstevel@tonic-gate if (krb5_principal_compare(context, server, creds->server)) { 1407c478bd9Sstevel@tonic-gate /* make an ap_req */ 141505d05c7Sgtb if ((ret = krb5_mk_req_extended(context, &authcon, 0, NULL, creds, 142505d05c7Sgtb &ap_req))) 1437c478bd9Sstevel@tonic-gate goto cleanup; 1447c478bd9Sstevel@tonic-gate } else { 1457c478bd9Sstevel@tonic-gate /* this is unclean, but it's the easiest way without ripping the 1467c478bd9Sstevel@tonic-gate library into very small pieces. store the client's initial cred 1477c478bd9Sstevel@tonic-gate in a memory ccache, then call the library. Later, we'll copy 1487c478bd9Sstevel@tonic-gate everything except the initial cred into the ccache we return to 1497c478bd9Sstevel@tonic-gate the user. A clean implementation would involve library 1507c478bd9Sstevel@tonic-gate internals with a coherent idea of "in" and "out". */ 1517c478bd9Sstevel@tonic-gate 1527c478bd9Sstevel@tonic-gate /* insert the initial cred into the ccache */ 1537c478bd9Sstevel@tonic-gate 154505d05c7Sgtb if ((ret = krb5_cc_resolve(context, "MEMORY:rd_req", &ccache))) 1557c478bd9Sstevel@tonic-gate goto cleanup; 1567c478bd9Sstevel@tonic-gate 1577c478bd9Sstevel@tonic-gate if ((ret = krb5_cc_initialize(context, ccache, creds->client)) != NULL) 1587c478bd9Sstevel@tonic-gate goto cleanup; 1597c478bd9Sstevel@tonic-gate 1607c478bd9Sstevel@tonic-gate if ((ret = krb5_cc_store_cred(context, ccache, creds)) != NULL) 1617c478bd9Sstevel@tonic-gate goto cleanup; 1627c478bd9Sstevel@tonic-gate 1637c478bd9Sstevel@tonic-gate /* set up for get_creds */ 1647c478bd9Sstevel@tonic-gate memset(&in_creds, 0, sizeof(in_creds)); 1657c478bd9Sstevel@tonic-gate in_creds.client = creds->client; 1667c478bd9Sstevel@tonic-gate in_creds.server = server; 167505d05c7Sgtb if ((ret = krb5_timeofday(context, &in_creds.times.endtime))) 1687c478bd9Sstevel@tonic-gate goto cleanup; 1697c478bd9Sstevel@tonic-gate in_creds.times.endtime += 5*60; 1707c478bd9Sstevel@tonic-gate 171505d05c7Sgtb if ((ret = krb5_get_credentials(context, 0, ccache, &in_creds, 172505d05c7Sgtb &out_creds))) 1737c478bd9Sstevel@tonic-gate goto cleanup; 1747c478bd9Sstevel@tonic-gate 1757c478bd9Sstevel@tonic-gate /* make an ap_req */ 176505d05c7Sgtb if ((ret = krb5_mk_req_extended(context, &authcon, 0, NULL, out_creds, 177505d05c7Sgtb &ap_req))) 1787c478bd9Sstevel@tonic-gate goto cleanup; 1797c478bd9Sstevel@tonic-gate } 1807c478bd9Sstevel@tonic-gate 1817c478bd9Sstevel@tonic-gate /* wipe the auth context for mk_req */ 1827c478bd9Sstevel@tonic-gate if (authcon) { 1837c478bd9Sstevel@tonic-gate krb5_auth_con_free(context, authcon); 1847c478bd9Sstevel@tonic-gate authcon = NULL; 1857c478bd9Sstevel@tonic-gate } 1867c478bd9Sstevel@tonic-gate 1877c478bd9Sstevel@tonic-gate /* verify the ap_req */ 1887c478bd9Sstevel@tonic-gate 189505d05c7Sgtb if ((ret = krb5_rd_req(context, &authcon, &ap_req, server, keytab, 190505d05c7Sgtb NULL, NULL))) 1917c478bd9Sstevel@tonic-gate goto cleanup; 1927c478bd9Sstevel@tonic-gate 1937c478bd9Sstevel@tonic-gate /* if we get this far, then the verification succeeded. We can 1947c478bd9Sstevel@tonic-gate still fail if the library stuff here fails, but that's it */ 1957c478bd9Sstevel@tonic-gate 1967c478bd9Sstevel@tonic-gate if (ccache_arg && ccache) { 1977c478bd9Sstevel@tonic-gate if (*ccache_arg == NULL) { 1987c478bd9Sstevel@tonic-gate krb5_ccache retcc; 1997c478bd9Sstevel@tonic-gate 2007c478bd9Sstevel@tonic-gate retcc = NULL; 2017c478bd9Sstevel@tonic-gate 2027c478bd9Sstevel@tonic-gate if (((ret = krb5_cc_resolve(context, "MEMORY:rd_req2", &retcc)) != NULL) || 2037c478bd9Sstevel@tonic-gate ((ret = krb5_cc_initialize(context, retcc, creds->client)) != NULL) || 2047c478bd9Sstevel@tonic-gate ((ret = krb5_cc_copy_creds_except(context, ccache, retcc, 2057c478bd9Sstevel@tonic-gate creds->server)) != NULL)) { 2067c478bd9Sstevel@tonic-gate if (retcc) 2077c478bd9Sstevel@tonic-gate (void) krb5_cc_destroy(context, retcc); 2087c478bd9Sstevel@tonic-gate } else { 2097c478bd9Sstevel@tonic-gate *ccache_arg = retcc; 2107c478bd9Sstevel@tonic-gate } 2117c478bd9Sstevel@tonic-gate } else { 2127c478bd9Sstevel@tonic-gate ret = krb5_cc_copy_creds_except(context, ccache, *ccache_arg, 2137c478bd9Sstevel@tonic-gate server); 2147c478bd9Sstevel@tonic-gate } 2157c478bd9Sstevel@tonic-gate } 2167c478bd9Sstevel@tonic-gate 2177c478bd9Sstevel@tonic-gate /* if any of the above paths returned an errors, then ret is set 2187c478bd9Sstevel@tonic-gate accordingly. either that, or it's zero, which is fine, too */ 2197c478bd9Sstevel@tonic-gate 2207c478bd9Sstevel@tonic-gate cleanup: 2217c478bd9Sstevel@tonic-gate if (!server_arg && server) 2227c478bd9Sstevel@tonic-gate krb5_free_principal(context, server); 2237c478bd9Sstevel@tonic-gate if (!keytab_arg && keytab) 2247c478bd9Sstevel@tonic-gate (void) krb5_kt_close(context, keytab); 2257c478bd9Sstevel@tonic-gate if (ccache) 2267c478bd9Sstevel@tonic-gate (void) krb5_cc_destroy(context, ccache); 2277c478bd9Sstevel@tonic-gate if (out_creds) 2287c478bd9Sstevel@tonic-gate krb5_free_creds(context, out_creds); 2297c478bd9Sstevel@tonic-gate if (authcon) 2307c478bd9Sstevel@tonic-gate krb5_auth_con_free(context, authcon); 2317c478bd9Sstevel@tonic-gate if (ap_req.data) 2327c478bd9Sstevel@tonic-gate krb5_xfree(ap_req.data); 2337c478bd9Sstevel@tonic-gate 2347c478bd9Sstevel@tonic-gate return(ret); 2357c478bd9Sstevel@tonic-gate } 236