several new kerberos related libraries and applications to FreeBSD: o kgetcred(1) allows one to manually get a ticket for a particular service. o kf(1) securily forwards ticket to another host through an authenticated and encrypted stream. o kcc(1) is an umbrella program around klist(1), kswitch(1), kgetcred(1) and other user kerberos operations. klist and kswitch are just symlinks to kcc(1) now. o kswitch(1) allows you to easily switch between kerberos credentials if you're running KCM. o hxtool(1) is a certificate management tool to use with PKINIT. o string2key(1) maps a password into key. o kdigest(8) is a userland tool to access the KDC's digest interface. o kimpersonate(8) creates a "fake" ticket for a service. We also now install manpages for some lirbaries that were not installed before, libheimntlm and libhx509. - The new HEIMDAL version no longer supports Kerberos 4. All users are recommended to switch to Kerberos 5. - Weak ciphers are now disabled by default. To enable DES support (used by telnet(8)), use "allow_weak_crypto" option in krb5.conf. - libtelnet, pam_ksu and pam_krb5 are now compiled with error on warnings disabled due to the function they use (krb5_get_err_text(3)) being deprecated. I plan to work on this next. - Heimdal's KDC now require sqlite to operate. We use the bundled version and install it as libheimsqlite. If some other FreeBSD components will require it in the future we can rename it to libbsdsqlite and use for these components as well. - This is not a latest Heimdal version, the new one was released while I was working on the update. I will update it to 1.5.2 soon, as it fixes some important bugs and security issues.
261 lines
7.0 KiB
C
261 lines
7.0 KiB
C
/*
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* Copyright (c) 1997-2004 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5_locl.h"
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static krb5_error_code
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verify_common (krb5_context context,
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krb5_principal principal,
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krb5_ccache ccache,
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krb5_keytab keytab,
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krb5_boolean secure,
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const char *service,
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krb5_creds cred)
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{
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krb5_error_code ret;
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krb5_principal server;
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krb5_verify_init_creds_opt vopt;
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krb5_ccache id;
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ret = krb5_sname_to_principal (context, NULL, service, KRB5_NT_SRV_HST,
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&server);
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if(ret)
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return ret;
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krb5_verify_init_creds_opt_init(&vopt);
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krb5_verify_init_creds_opt_set_ap_req_nofail(&vopt, secure);
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ret = krb5_verify_init_creds(context,
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&cred,
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server,
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keytab,
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NULL,
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&vopt);
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krb5_free_principal(context, server);
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if(ret)
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return ret;
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if(ccache == NULL)
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ret = krb5_cc_default (context, &id);
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else
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id = ccache;
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if(ret == 0){
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ret = krb5_cc_initialize(context, id, principal);
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if(ret == 0){
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ret = krb5_cc_store_cred(context, id, &cred);
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}
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if(ccache == NULL)
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krb5_cc_close(context, id);
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}
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krb5_free_cred_contents(context, &cred);
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return ret;
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}
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/*
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* Verify user `principal' with `password'.
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*
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* If `secure', also verify against local service key for `service'.
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*
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* As a side effect, fresh tickets are obtained and stored in `ccache'.
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*/
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_init(krb5_verify_opt *opt)
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{
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memset(opt, 0, sizeof(*opt));
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opt->secure = TRUE;
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opt->service = "host";
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}
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KRB5_LIB_FUNCTION int KRB5_LIB_CALL
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krb5_verify_opt_alloc(krb5_context context, krb5_verify_opt **opt)
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{
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*opt = calloc(1, sizeof(**opt));
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if ((*opt) == NULL) {
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krb5_set_error_message(context, ENOMEM,
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N_("malloc: out of memory", ""));
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return ENOMEM;
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}
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krb5_verify_opt_init(*opt);
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return 0;
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}
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_free(krb5_verify_opt *opt)
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{
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free(opt);
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}
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_set_ccache(krb5_verify_opt *opt, krb5_ccache ccache)
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{
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opt->ccache = ccache;
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}
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_set_keytab(krb5_verify_opt *opt, krb5_keytab keytab)
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{
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opt->keytab = keytab;
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}
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_set_secure(krb5_verify_opt *opt, krb5_boolean secure)
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{
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opt->secure = secure;
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}
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_set_service(krb5_verify_opt *opt, const char *service)
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{
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opt->service = service;
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}
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KRB5_LIB_FUNCTION void KRB5_LIB_CALL
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krb5_verify_opt_set_flags(krb5_verify_opt *opt, unsigned int flags)
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{
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opt->flags |= flags;
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}
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static krb5_error_code
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verify_user_opt_int(krb5_context context,
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krb5_principal principal,
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const char *password,
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krb5_verify_opt *vopt)
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{
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krb5_error_code ret;
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krb5_get_init_creds_opt *opt;
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krb5_creds cred;
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ret = krb5_get_init_creds_opt_alloc (context, &opt);
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if (ret)
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return ret;
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krb5_get_init_creds_opt_set_default_flags(context, NULL,
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krb5_principal_get_realm(context, principal),
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opt);
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ret = krb5_get_init_creds_password (context,
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&cred,
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principal,
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password,
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krb5_prompter_posix,
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NULL,
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0,
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NULL,
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opt);
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krb5_get_init_creds_opt_free(context, opt);
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if(ret)
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return ret;
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#define OPT(V, D) ((vopt && (vopt->V)) ? (vopt->V) : (D))
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return verify_common (context, principal, OPT(ccache, NULL),
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OPT(keytab, NULL), vopt ? vopt->secure : TRUE,
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OPT(service, "host"), cred);
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#undef OPT
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}
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_verify_user_opt(krb5_context context,
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krb5_principal principal,
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const char *password,
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krb5_verify_opt *opt)
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{
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krb5_error_code ret;
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if(opt && (opt->flags & KRB5_VERIFY_LREALMS)) {
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krb5_realm *realms, *r;
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ret = krb5_get_default_realms (context, &realms);
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if (ret)
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return ret;
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ret = KRB5_CONFIG_NODEFREALM;
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for (r = realms; *r != NULL && ret != 0; ++r) {
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ret = krb5_principal_set_realm(context, principal, *r);
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if (ret) {
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krb5_free_host_realm (context, realms);
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return ret;
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}
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ret = verify_user_opt_int(context, principal, password, opt);
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}
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krb5_free_host_realm (context, realms);
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if(ret)
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return ret;
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} else
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ret = verify_user_opt_int(context, principal, password, opt);
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return ret;
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}
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/* compat function that calls above */
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_verify_user(krb5_context context,
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krb5_principal principal,
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krb5_ccache ccache,
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const char *password,
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krb5_boolean secure,
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const char *service)
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{
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krb5_verify_opt opt;
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krb5_verify_opt_init(&opt);
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krb5_verify_opt_set_ccache(&opt, ccache);
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krb5_verify_opt_set_secure(&opt, secure);
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krb5_verify_opt_set_service(&opt, service);
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return krb5_verify_user_opt(context, principal, password, &opt);
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}
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/*
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* A variant of `krb5_verify_user'. The realm of `principal' is
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* ignored and all the local realms are tried.
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*/
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KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
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krb5_verify_user_lrealm(krb5_context context,
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krb5_principal principal,
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krb5_ccache ccache,
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const char *password,
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krb5_boolean secure,
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const char *service)
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{
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krb5_verify_opt opt;
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krb5_verify_opt_init(&opt);
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krb5_verify_opt_set_ccache(&opt, ccache);
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krb5_verify_opt_set_secure(&opt, secure);
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krb5_verify_opt_set_service(&opt, service);
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krb5_verify_opt_set_flags(&opt, KRB5_VERIFY_LREALMS);
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return krb5_verify_user_opt(context, principal, password, &opt);
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}
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