kerberos utility library
Copyright (C) Andrew Tridgell 2001
Copyright (C) Remus Koos 2001
-
-
+ Copyright (C) Nalin Dahyabhai <nalin@redhat.com> 2004.
+ Copyright (C) Jeremy Allison 2004.
+ Copyright (C) Gerald Carter 2006.
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#ifdef HAVE_KRB5
+#define DEFAULT_KRB5_PORT 88
+
+#define LIBADS_CCACHE_NAME "MEMORY:libads"
+
/*
- simulate a kinit, putting the tgt in the default cache location
+ we use a prompter to avoid a crash bug in the kerberos libs when
+ dealing with empty passwords
+ this prompter is just a string copy ...
+*/
+static krb5_error_code
+kerb_prompter(krb5_context ctx, void *data,
+ const char *name,
+ const char *banner,
+ int num_prompts,
+ krb5_prompt prompts[])
+{
+ if (num_prompts == 0) return 0;
+
+ memset(prompts[0].reply->data, '\0', prompts[0].reply->length);
+ if (prompts[0].reply->length > 0) {
+ if (data) {
+ strncpy(prompts[0].reply->data, (const char *)data,
+ prompts[0].reply->length-1);
+ prompts[0].reply->length = strlen(prompts[0].reply->data);
+ } else {
+ prompts[0].reply->length = 0;
+ }
+ }
+ return 0;
+}
+
+static bool smb_krb5_err_io_nstatus(TALLOC_CTX *mem_ctx,
+ DATA_BLOB *edata_blob,
+ KRB5_EDATA_NTSTATUS *edata)
+{
+ bool ret = False;
+ prs_struct ps;
+
+ if (!mem_ctx || !edata_blob || !edata)
+ return False;
+
+ if (!prs_init(&ps, edata_blob->length, mem_ctx, UNMARSHALL))
+ return False;
+
+ if (!prs_copy_data_in(&ps, (char *)edata_blob->data, edata_blob->length))
+ goto out;
+
+ prs_set_offset(&ps, 0);
+
+ if (!prs_ntstatus("ntstatus", &ps, 1, &edata->ntstatus))
+ goto out;
+
+ if (!prs_uint32("unknown1", &ps, 1, &edata->unknown1))
+ goto out;
+
+ if (!prs_uint32("unknown2", &ps, 1, &edata->unknown2)) /* only seen 00000001 here */
+ goto out;
+
+ ret = True;
+ out:
+ prs_mem_free(&ps);
+
+ return ret;
+}
+
+ static bool smb_krb5_get_ntstatus_from_krb5_error(krb5_error *error,
+ NTSTATUS *nt_status)
+{
+ DATA_BLOB edata;
+ DATA_BLOB unwrapped_edata;
+ TALLOC_CTX *mem_ctx;
+ KRB5_EDATA_NTSTATUS parsed_edata;
+
+#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR
+ edata = data_blob(error->e_data->data, error->e_data->length);
+#else
+ edata = data_blob(error->e_data.data, error->e_data.length);
+#endif /* HAVE_E_DATA_POINTER_IN_KRB5_ERROR */
+
+#ifdef DEVELOPER
+ dump_data(10, edata.data, edata.length);
+#endif /* DEVELOPER */
+
+ mem_ctx = talloc_init("smb_krb5_get_ntstatus_from_krb5_error");
+ if (mem_ctx == NULL) {
+ data_blob_free(&edata);
+ return False;
+ }
+
+ if (!unwrap_edata_ntstatus(mem_ctx, &edata, &unwrapped_edata)) {
+ data_blob_free(&edata);
+ TALLOC_FREE(mem_ctx);
+ return False;
+ }
+
+ data_blob_free(&edata);
+
+ if (!smb_krb5_err_io_nstatus(mem_ctx, &unwrapped_edata, &parsed_edata)) {
+ data_blob_free(&unwrapped_edata);
+ TALLOC_FREE(mem_ctx);
+ return False;
+ }
+
+ data_blob_free(&unwrapped_edata);
+
+ if (nt_status) {
+ *nt_status = parsed_edata.ntstatus;
+ }
+
+ TALLOC_FREE(mem_ctx);
+
+ return True;
+}
+
+ static bool smb_krb5_get_ntstatus_from_krb5_error_init_creds_opt(krb5_context ctx,
+ krb5_get_init_creds_opt *opt,
+ NTSTATUS *nt_status)
+{
+ bool ret = False;
+ krb5_error *error = NULL;
+
+#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_GET_ERROR
+ ret = krb5_get_init_creds_opt_get_error(ctx, opt, &error);
+ if (ret) {
+ DEBUG(1,("krb5_get_init_creds_opt_get_error gave: %s\n",
+ error_message(ret)));
+ return False;
+ }
+#endif /* HAVE_KRB5_GET_INIT_CREDS_OPT_GET_ERROR */
+
+ if (!error) {
+ DEBUG(1,("no krb5_error\n"));
+ return False;
+ }
+
+#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR
+ if (!error->e_data) {
+#else
+ if (error->e_data.data == NULL) {
+#endif /* HAVE_E_DATA_POINTER_IN_KRB5_ERROR */
+ DEBUG(1,("no edata in krb5_error\n"));
+ krb5_free_error(ctx, error);
+ return False;
+ }
+
+ ret = smb_krb5_get_ntstatus_from_krb5_error(error, nt_status);
+
+ krb5_free_error(ctx, error);
+
+ return ret;
+}
+
+/*
+ simulate a kinit, putting the tgt in the given cache location. If cache_name == NULL
+ place in default cache location.
remus@snapserver.com
*/
-int kerberos_kinit_password(const char *principal, const char *password)
+int kerberos_kinit_password_ext(const char *principal,
+ const char *password,
+ int time_offset,
+ time_t *expire_time,
+ time_t *renew_till_time,
+ const char *cache_name,
+ bool request_pac,
+ bool add_netbios_addr,
+ time_t renewable_time,
+ NTSTATUS *ntstatus)
{
- krb5_context ctx;
+ krb5_context ctx = NULL;
krb5_error_code code = 0;
- krb5_ccache cc;
- krb5_principal me;
+ krb5_ccache cc = NULL;
+ krb5_principal me = NULL;
krb5_creds my_creds;
+ krb5_get_init_creds_opt *opt = NULL;
+ smb_krb5_addresses *addr = NULL;
- if (! *password) {
- /* kerberos dies on an empty password! */
- return KRB5_PARSE_MALFORMED;
- }
+ ZERO_STRUCT(my_creds);
+ initialize_krb5_error_table();
if ((code = krb5_init_context(&ctx)))
- return code;
-
- if ((code = krb5_cc_default(ctx, &cc))) {
- krb5_free_context(ctx);
- return code;
+ goto out;
+
+ if (time_offset != 0) {
+ krb5_set_real_time(ctx, time(NULL) + time_offset, 0);
}
-
- if ((code = krb5_parse_name(ctx, principal, &me))) {
- krb5_free_context(ctx);
- return code;
+
+ DEBUG(10,("kerberos_kinit_password: as %s using [%s] as ccache and config [%s]\n",
+ principal,
+ cache_name ? cache_name: krb5_cc_default_name(ctx),
+ getenv("KRB5_CONFIG")));
+
+ if ((code = krb5_cc_resolve(ctx, cache_name ? cache_name : krb5_cc_default_name(ctx), &cc))) {
+ goto out;
}
- if ((code = krb5_get_init_creds_password(ctx, &my_creds, me, (char*)password, NULL,
- NULL, 0, NULL, NULL))) {
- krb5_free_principal(ctx, me);
- krb5_free_context(ctx);
- return code;
+ if ((code = smb_krb5_parse_name(ctx, principal, &me))) {
+ goto out;
}
-
+
+ if ((code = smb_krb5_get_init_creds_opt_alloc(ctx, &opt))) {
+ goto out;
+ }
+
+ krb5_get_init_creds_opt_set_renew_life(opt, renewable_time);
+ krb5_get_init_creds_opt_set_forwardable(opt, True);
+#if 0
+ /* insane testing */
+ krb5_get_init_creds_opt_set_tkt_life(opt, 60);
+#endif
+
+#ifdef HAVE_KRB5_GET_INIT_CREDS_OPT_SET_PAC_REQUEST
+ if (request_pac) {
+ if ((code = krb5_get_init_creds_opt_set_pac_request(ctx, opt, (krb5_boolean)request_pac))) {
+ goto out;
+ }
+ }
+#endif
+ if (add_netbios_addr) {
+ if ((code = smb_krb5_gen_netbios_krb5_address(&addr))) {
+ goto out;
+ }
+ krb5_get_init_creds_opt_set_address_list(opt, addr->addrs);
+ }
+
+ if ((code = krb5_get_init_creds_password(ctx, &my_creds, me, CONST_DISCARD(char *,password),
+ kerb_prompter, CONST_DISCARD(char *,password),
+ 0, NULL, opt))) {
+ goto out;
+ }
+
if ((code = krb5_cc_initialize(ctx, cc, me))) {
- krb5_free_cred_contents(ctx, &my_creds);
- krb5_free_principal(ctx, me);
- krb5_free_context(ctx);
- return code;
+ goto out;
}
if ((code = krb5_cc_store_cred(ctx, cc, &my_creds))) {
- krb5_cc_close(ctx, cc);
- krb5_free_cred_contents(ctx, &my_creds);
- krb5_free_principal(ctx, me);
- krb5_free_context(ctx);
- return code;
+ goto out;
}
-
- krb5_cc_close(ctx, cc);
+
+ if (expire_time) {
+ *expire_time = (time_t) my_creds.times.endtime;
+ }
+
+ if (renew_till_time) {
+ *renew_till_time = (time_t) my_creds.times.renew_till;
+ }
+ out:
+ if (ntstatus) {
+
+ NTSTATUS status;
+
+ /* fast path */
+ if (code == 0) {
+ *ntstatus = NT_STATUS_OK;
+ goto cleanup;
+ }
+
+ /* try to get ntstatus code out of krb5_error when we have it
+ * inside the krb5_get_init_creds_opt - gd */
+
+ if (opt && smb_krb5_get_ntstatus_from_krb5_error_init_creds_opt(ctx, opt, &status)) {
+ *ntstatus = status;
+ goto cleanup;
+ }
+
+ /* fall back to self-made-mapping */
+ *ntstatus = krb5_to_nt_status(code);
+ }
+
+ cleanup:
krb5_free_cred_contents(ctx, &my_creds);
- krb5_free_principal(ctx, me);
- krb5_free_context(ctx);
-
- return 0;
+ if (me) {
+ krb5_free_principal(ctx, me);
+ }
+ if (addr) {
+ smb_krb5_free_addresses(ctx, addr);
+ }
+ if (opt) {
+ smb_krb5_get_init_creds_opt_free(ctx, opt);
+ }
+ if (cc) {
+ krb5_cc_close(ctx, cc);
+ }
+ if (ctx) {
+ krb5_free_context(ctx);
+ }
+ return code;
}
{
char *s;
int ret;
+ const char *account_name;
+ fstring acct_name;
+
+ if ( IS_DC ) {
+ /* this will end up getting a ticket for DOMAIN@RUSTED.REA.LM */
+ account_name = lp_workgroup();
+ } else {
+ /* always use the sAMAccountName for security = domain */
+ /* global_myname()$@REA.LM */
+ if ( lp_security() == SEC_DOMAIN ) {
+ fstr_sprintf( acct_name, "%s$", global_myname() );
+ account_name = acct_name;
+ }
+ else
+ /* This looks like host/global_myname()@REA.LM */
+ account_name = ads->auth.user_name;
+ }
- if (!ads->user_name) {
- /* by default use the machine account */
- extern pstring global_myname;
- fstring myname;
- fstrcpy(myname, global_myname);
- strlower(myname);
- asprintf(&ads->user_name, "HOST/%s", global_myname);
+ if (asprintf(&s, "%s@%s", account_name, ads->auth.realm) == -1) {
+ return KRB5_CC_NOMEM;
}
- asprintf(&s, "%s@%s", ads->user_name, ads->realm);
- ret = kerberos_kinit_password(s, ads->password);
+
+ if (!ads->auth.password) {
+ SAFE_FREE(s);
+ return KRB5_LIBOS_CANTREADPWD;
+ }
+
+ ret = kerberos_kinit_password_ext(s, ads->auth.password, ads->auth.time_offset,
+ &ads->auth.tgt_expire, NULL, NULL, False, False, ads->auth.renewable,
+ NULL);
if (ret) {
DEBUG(0,("kerberos_kinit_password %s failed: %s\n",
s, error_message(ret)));
}
- free(s);
+ SAFE_FREE(s);
return ret;
}
-/*
- verify an incoming ticket and parse out the principal name and
- authorization_data if available
-*/
-NTSTATUS ads_verify_ticket(ADS_STRUCT *ads, const DATA_BLOB *ticket,
- char **principal, DATA_BLOB *auth_data)
-{
- krb5_context context;
- krb5_auth_context auth_context = NULL;
- krb5_keytab keytab = NULL;
- krb5_data packet;
- krb5_ticket *tkt = NULL;
- krb5_data salt;
- krb5_encrypt_block eblock;
- int ret;
- krb5_keyblock * key;
- krb5_principal host_princ;
- char *host_princ_s;
- extern pstring global_myname;
- fstring myname;
- char *password_s;
- krb5_data password;
+int ads_kdestroy(const char *cc_name)
+{
+ krb5_error_code code;
+ krb5_context ctx = NULL;
+ krb5_ccache cc = NULL;
- if (!secrets_init()) {
- DEBUG(1,("secrets_init failed\n"));
- return NT_STATUS_LOGON_FAILURE;
+ initialize_krb5_error_table();
+ if ((code = krb5_init_context (&ctx))) {
+ DEBUG(3, ("ads_kdestroy: kdb5_init_context failed: %s\n",
+ error_message(code)));
+ return code;
+ }
+
+ if (!cc_name) {
+ if ((code = krb5_cc_default(ctx, &cc))) {
+ krb5_free_context(ctx);
+ return code;
+ }
+ } else {
+ if ((code = krb5_cc_resolve(ctx, cc_name, &cc))) {
+ DEBUG(3, ("ads_kdestroy: krb5_cc_resolve failed: %s\n",
+ error_message(code)));
+ krb5_free_context(ctx);
+ return code;
+ }
}
- password_s = secrets_fetch_machine_password();
- if (!password_s) {
- DEBUG(1,("failed to fetch machine password\n"));
- return NT_STATUS_LOGON_FAILURE;
+ if ((code = krb5_cc_destroy (ctx, cc))) {
+ DEBUG(3, ("ads_kdestroy: krb5_cc_destroy failed: %s\n",
+ error_message(code)));
}
- password.data = password_s;
- password.length = strlen(password_s);
+ krb5_free_context (ctx);
+ return code;
+}
- ret = krb5_init_context(&context);
- if (ret) {
- DEBUG(1,("krb5_init_context failed (%s)\n", error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+/************************************************************************
+ Routine to fetch the salting principal for a service. Active
+ Directory may use a non-obvious principal name to generate the salt
+ when it determines the key to use for encrypting tickets for a service,
+ and hopefully we detected that when we joined the domain.
+ ************************************************************************/
+
+static char *kerberos_secrets_fetch_salting_principal(const char *service, int enctype)
+{
+ char *key = NULL;
+ char *ret = NULL;
+
+ asprintf(&key, "%s/%s/enctype=%d", SECRETS_SALTING_PRINCIPAL, service, enctype);
+ if (!key) {
+ return NULL;
}
+ ret = (char *)secrets_fetch(key, NULL);
+ SAFE_FREE(key);
+ return ret;
+}
- ret = krb5_set_default_realm(context, ads->realm);
- if (ret) {
- DEBUG(1,("krb5_set_default_realm failed (%s)\n", error_message(ret)));
- ads_destroy(&ads);
- return NT_STATUS_LOGON_FAILURE;
+/************************************************************************
+ Return the standard DES salt key
+************************************************************************/
+
+char* kerberos_standard_des_salt( void )
+{
+ fstring salt;
+
+ fstr_sprintf( salt, "host/%s.%s@", global_myname(), lp_realm() );
+ strlower_m( salt );
+ fstrcat( salt, lp_realm() );
+
+ return SMB_STRDUP( salt );
+}
+
+/************************************************************************
+************************************************************************/
+
+static char* des_salt_key( void )
+{
+ char *key;
+
+ asprintf(&key, "%s/DES/%s", SECRETS_SALTING_PRINCIPAL, lp_realm());
+
+ return key;
+}
+
+/************************************************************************
+************************************************************************/
+
+bool kerberos_secrets_store_des_salt( const char* salt )
+{
+ char* key;
+ bool ret;
+
+ if ( (key = des_salt_key()) == NULL ) {
+ DEBUG(0,("kerberos_secrets_store_des_salt: failed to generate key!\n"));
+ return False;
}
- /* this whole process is far more complex than I would
- like. We have to go through all this to allow us to store
- the secret internally, instead of using /etc/krb5.keytab */
- ret = krb5_auth_con_init(context, &auth_context);
- if (ret) {
- DEBUG(1,("krb5_auth_con_init failed (%s)\n", error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+ if ( !salt ) {
+ DEBUG(8,("kerberos_secrets_store_des_salt: deleting salt\n"));
+ secrets_delete( key );
+ return True;
}
- fstrcpy(myname, global_myname);
- strlower(myname);
- asprintf(&host_princ_s, "HOST/%s@%s", myname, lp_realm());
- ret = krb5_parse_name(context, host_princ_s, &host_princ);
- if (ret) {
- DEBUG(1,("krb5_parse_name(%s) failed (%s)\n", host_princ_s, error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+ DEBUG(3,("kerberos_secrets_store_des_salt: Storing salt \"%s\"\n", salt));
+
+ ret = secrets_store( key, salt, strlen(salt)+1 );
+
+ SAFE_FREE( key );
+
+ return ret;
+}
+
+/************************************************************************
+************************************************************************/
+
+char* kerberos_secrets_fetch_des_salt( void )
+{
+ char *salt, *key;
+
+ if ( (key = des_salt_key()) == NULL ) {
+ DEBUG(0,("kerberos_secrets_fetch_des_salt: failed to generate key!\n"));
+ return False;
}
- ret = krb5_principal2salt(context, host_princ, &salt);
- if (ret) {
- DEBUG(1,("krb5_principal2salt failed (%s)\n", error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+ salt = (char*)secrets_fetch( key, NULL );
+
+ SAFE_FREE( key );
+
+ return salt;
+}
+
+/************************************************************************
+ Routine to get the default realm from the kerberos credentials cache.
+ Caller must free if the return value is not NULL.
+************************************************************************/
+
+char *kerberos_get_default_realm_from_ccache( void )
+{
+ char *realm = NULL;
+ krb5_context ctx = NULL;
+ krb5_ccache cc = NULL;
+ krb5_principal princ = NULL;
+
+ initialize_krb5_error_table();
+ if (krb5_init_context(&ctx)) {
+ return NULL;
+ }
+
+ DEBUG(5,("kerberos_get_default_realm_from_ccache: "
+ "Trying to read krb5 cache: %s\n",
+ krb5_cc_default_name(ctx)));
+ if (krb5_cc_default(ctx, &cc)) {
+ DEBUG(0,("kerberos_get_default_realm_from_ccache: "
+ "failed to read default cache\n"));
+ goto out;
}
-
- if (!(key = (krb5_keyblock *)malloc(sizeof(*key)))) {
- return NT_STATUS_NO_MEMORY;
+ if (krb5_cc_get_principal(ctx, cc, &princ)) {
+ DEBUG(0,("kerberos_get_default_realm_from_ccache: "
+ "failed to get default principal\n"));
+ goto out;
+ }
+
+#if defined(HAVE_KRB5_PRINCIPAL_GET_REALM)
+ realm = SMB_STRDUP(krb5_principal_get_realm(ctx, princ));
+#elif defined(HAVE_KRB5_PRINC_REALM)
+ {
+ krb5_data *realm_data = krb5_princ_realm(ctx, princ);
+ realm = SMB_STRNDUP(realm_data->data, realm_data->length);
+ }
+#endif
+
+ out:
+
+ if (princ) {
+ krb5_free_principal(ctx, princ);
+ }
+ if (cc) {
+ krb5_cc_close(ctx, cc);
}
+ if (ctx) {
+ krb5_free_context(ctx);
+ }
+
+ return realm;
+}
+
+
+/************************************************************************
+ Routine to get the salting principal for this service. This is
+ maintained for backwards compatibilty with releases prior to 3.0.24.
+ Since we store the salting principal string only at join, we may have
+ to look for the older tdb keys. Caller must free if return is not null.
+ ************************************************************************/
+
+krb5_principal kerberos_fetch_salt_princ_for_host_princ(krb5_context context,
+ krb5_principal host_princ,
+ int enctype)
+{
+ char *unparsed_name = NULL, *salt_princ_s = NULL;
+ krb5_principal ret_princ = NULL;
- krb5_use_enctype(context, &eblock, ENCTYPE_DES_CBC_MD5);
+ /* lookup new key first */
+
+ if ( (salt_princ_s = kerberos_secrets_fetch_des_salt()) == NULL ) {
- ret = krb5_string_to_key(context, &eblock, key, &password, &salt);
- if (ret) {
- DEBUG(1,("krb5_string_to_key failed (%s)\n", error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+ /* look under the old key. If this fails, just use the standard key */
+
+ if (smb_krb5_unparse_name(context, host_princ, &unparsed_name) != 0) {
+ return (krb5_principal)NULL;
+ }
+ if ((salt_princ_s = kerberos_secrets_fetch_salting_principal(unparsed_name, enctype)) == NULL) {
+ /* fall back to host/machine.realm@REALM */
+ salt_princ_s = kerberos_standard_des_salt();
+ }
}
- krb5_auth_con_setuseruserkey(context, auth_context, key);
+ if (smb_krb5_parse_name(context, salt_princ_s, &ret_princ) != 0) {
+ ret_princ = NULL;
+ }
+
+ SAFE_FREE(unparsed_name);
+ SAFE_FREE(salt_princ_s);
+
+ return ret_princ;
+}
- packet.length = ticket->length;
- packet.data = (krb5_pointer)ticket->data;
+/************************************************************************
+ Routine to set the salting principal for this service. Active
+ Directory may use a non-obvious principal name to generate the salt
+ when it determines the key to use for encrypting tickets for a service,
+ and hopefully we detected that when we joined the domain.
+ Setting principal to NULL deletes this entry.
+ ************************************************************************/
-#if 0
- file_save("/tmp/ticket.dat", ticket->data, ticket->length);
-#endif
+bool kerberos_secrets_store_salting_principal(const char *service,
+ int enctype,
+ const char *principal)
+{
+ char *key = NULL;
+ bool ret = False;
+ krb5_context context = NULL;
+ krb5_principal princ = NULL;
+ char *princ_s = NULL;
+ char *unparsed_name = NULL;
- if ((ret = krb5_rd_req(context, &auth_context, &packet,
- NULL, keytab, NULL, &tkt))) {
- DEBUG(3,("krb5_rd_req with auth failed (%s)\n",
- error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+ krb5_init_context(&context);
+ if (!context) {
+ return False;
+ }
+ if (strchr_m(service, '@')) {
+ asprintf(&princ_s, "%s", service);
+ } else {
+ asprintf(&princ_s, "%s@%s", service, lp_realm());
}
- if (tkt->enc_part2) {
- *auth_data = data_blob(tkt->enc_part2->authorization_data[0]->contents,
- tkt->enc_part2->authorization_data[0]->length);
+ if (smb_krb5_parse_name(context, princ_s, &princ) != 0) {
+ goto out;
+
+ }
+ if (smb_krb5_unparse_name(context, princ, &unparsed_name) != 0) {
+ goto out;
}
-#if 0
- if (tkt->enc_part2) {
- file_save("/tmp/authdata.dat",
- tkt->enc_part2->authorization_data[0]->contents,
- tkt->enc_part2->authorization_data[0]->length);
+ asprintf(&key, "%s/%s/enctype=%d", SECRETS_SALTING_PRINCIPAL, unparsed_name, enctype);
+ if (!key) {
+ goto out;
}
-#endif
- if ((ret = krb5_unparse_name(context, tkt->enc_part2->client, principal))) {
- DEBUG(3,("krb5_unparse_name failed (%s)\n",
- error_message(ret)));
- return NT_STATUS_LOGON_FAILURE;
+ if ((principal != NULL) && (strlen(principal) > 0)) {
+ ret = secrets_store(key, principal, strlen(principal) + 1);
+ } else {
+ ret = secrets_delete(key);
+ }
+
+ out:
+
+ SAFE_FREE(key);
+ SAFE_FREE(princ_s);
+ SAFE_FREE(unparsed_name);
+
+ if (context) {
+ krb5_free_context(context);
}
- return NT_STATUS_OK;
+ return ret;
+}
+
+
+/************************************************************************
+************************************************************************/
+
+int kerberos_kinit_password(const char *principal,
+ const char *password,
+ int time_offset,
+ const char *cache_name)
+{
+ return kerberos_kinit_password_ext(principal,
+ password,
+ time_offset,
+ 0,
+ 0,
+ cache_name,
+ False,
+ False,
+ 0,
+ NULL);
}
+/************************************************************************
+************************************************************************/
+
+static char *print_kdc_line(char *mem_ctx,
+ const char *prev_line,
+ const struct sockaddr_storage *pss)
+{
+ char *kdc_str = NULL;
+
+ if (pss->ss_family == AF_INET) {
+ kdc_str = talloc_asprintf(mem_ctx, "%s\tkdc = %s\n",
+ prev_line,
+ print_canonical_sockaddr(mem_ctx, pss));
+ } else {
+ char addr[INET6_ADDRSTRLEN];
+ uint16_t port = get_sockaddr_port(pss);
+
+ if (port != 0 && port != DEFAULT_KRB5_PORT) {
+ /* Currently for IPv6 we can't specify a non-default
+ krb5 port with an address, as this requires a ':'.
+ Resolve to a name. */
+ char hostname[MAX_DNS_NAME_LENGTH];
+ int ret = sys_getnameinfo((const struct sockaddr *)pss,
+ sizeof(*pss),
+ hostname, sizeof(hostname),
+ NULL, 0,
+ NI_NAMEREQD);
+ if (ret) {
+ DEBUG(0,("print_kdc_line: can't resolve name "
+ "for kdc with non-default port %s. "
+ "Error %s\n.",
+ print_canonical_sockaddr(mem_ctx, pss),
+ gai_strerror(ret)));
+ }
+ /* Success, use host:port */
+ kdc_str = talloc_asprintf(mem_ctx,
+ "%s\tkdc = %s:%u\n",
+ prev_line,
+ hostname,
+ (unsigned int)port);
+ } else {
+ kdc_str = talloc_asprintf(mem_ctx, "%s\tkdc = %s\n",
+ prev_line,
+ print_sockaddr(addr,
+ sizeof(addr),
+ pss));
+ }
+ }
+ return kdc_str;
+}
+
+/************************************************************************
+ Create a string list of available kdc's, possibly searching by sitename.
+ Does DNS queries.
+************************************************************************/
+
+static char *get_kdc_ip_string(char *mem_ctx,
+ const char *realm,
+ const char *sitename,
+ struct sockaddr_storage *pss)
+{
+ int i;
+ struct ip_service *ip_srv_site = NULL;
+ struct ip_service *ip_srv_nonsite = NULL;
+ int count_site = 0;
+ int count_nonsite;
+ char *kdc_str = print_kdc_line(mem_ctx, "", pss);
+
+ if (kdc_str == NULL) {
+ return NULL;
+ }
+
+ /* Get the KDC's only in this site. */
+
+ if (sitename) {
+
+ get_kdc_list(realm, sitename, &ip_srv_site, &count_site);
+
+ for (i = 0; i < count_site; i++) {
+ if (addr_equal(&ip_srv_site[i].ss, pss)) {
+ continue;
+ }
+ /* Append to the string - inefficient
+ * but not done often. */
+ kdc_str = print_kdc_line(mem_ctx,
+ kdc_str,
+ &ip_srv_site[i].ss);
+ if (!kdc_str) {
+ SAFE_FREE(ip_srv_site);
+ return NULL;
+ }
+ }
+ }
+
+ /* Get all KDC's. */
+
+ get_kdc_list(realm, NULL, &ip_srv_nonsite, &count_nonsite);
+
+ for (i = 0; i < count_nonsite; i++) {
+ int j;
+
+ if (addr_equal(&ip_srv_nonsite[i].ss, pss)) {
+ continue;
+ }
+
+ /* Ensure this isn't an IP already seen (YUK! this is n*n....) */
+ for (j = 0; j < count_site; j++) {
+ if (addr_equal(&ip_srv_nonsite[i].ss,
+ &ip_srv_site[j].ss)) {
+ break;
+ }
+ /* As the lists are sorted we can break early if nonsite > site. */
+ if (ip_service_compare(&ip_srv_nonsite[i], &ip_srv_site[j]) > 0) {
+ break;
+ }
+ }
+ if (j != i) {
+ continue;
+ }
+
+ /* Append to the string - inefficient but not done often. */
+ kdc_str = print_kdc_line(mem_ctx,
+ kdc_str,
+ &ip_srv_nonsite[i].ss);
+ if (!kdc_str) {
+ SAFE_FREE(ip_srv_site);
+ SAFE_FREE(ip_srv_nonsite);
+ return NULL;
+ }
+ }
+
+
+ SAFE_FREE(ip_srv_site);
+ SAFE_FREE(ip_srv_nonsite);
+
+ DEBUG(10,("get_kdc_ip_string: Returning %s\n",
+ kdc_str ));
+
+ return kdc_str;
+}
+
+/************************************************************************
+ Create a specific krb5.conf file in the private directory pointing
+ at a specific kdc for a realm. Keyed off domain name. Sets
+ KRB5_CONFIG environment variable to point to this file. Must be
+ run as root or will fail (which is a good thing :-).
+************************************************************************/
+
+bool create_local_private_krb5_conf_for_domain(const char *realm,
+ const char *domain,
+ const char *sitename,
+ struct sockaddr_storage *pss)
+{
+ char *dname = talloc_asprintf(NULL, "%s/smb_krb5", lp_lockdir());
+ char *tmpname = NULL;
+ char *fname = NULL;
+ char *file_contents = NULL;
+ char *kdc_ip_string = NULL;
+ size_t flen = 0;
+ ssize_t ret;
+ int fd;
+ char *realm_upper = NULL;
+
+ if (!dname) {
+ return False;
+ }
+ if ((mkdir(dname, 0755)==-1) && (errno != EEXIST)) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: "
+ "failed to create directory %s. Error was %s\n",
+ dname, strerror(errno) ));
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ tmpname = talloc_asprintf(dname, "%s/smb_tmp_krb5.XXXXXX", lp_lockdir());
+ if (!tmpname) {
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ fname = talloc_asprintf(dname, "%s/krb5.conf.%s", dname, domain);
+ if (!fname) {
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ DEBUG(10,("create_local_private_krb5_conf_for_domain: fname = %s, realm = %s, domain = %s\n",
+ fname, realm, domain ));
+
+ realm_upper = talloc_strdup(fname, realm);
+ strupper_m(realm_upper);
+
+ kdc_ip_string = get_kdc_ip_string(dname, realm, sitename, pss);
+ if (!kdc_ip_string) {
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ file_contents = talloc_asprintf(fname,
+ "[libdefaults]\n\tdefault_realm = %s\n"
+ "default_tgs_enctypes = RC4-HMAC DES-CBC-CRC DES-CBC-MD5\n"
+ "default_tkt_enctypes = RC4-HMAC DES-CBC-CRC DES-CBC-MD5\n"
+ "preferred_enctypes = RC4-HMAC DES-CBC-CRC DES-CBC-MD5\n\n"
+ "[realms]\n\t%s = {\n"
+ "\t%s\t}\n",
+ realm_upper, realm_upper, kdc_ip_string);
+
+ if (!file_contents) {
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ flen = strlen(file_contents);
+
+ fd = smb_mkstemp(tmpname);
+ if (fd == -1) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: smb_mkstemp failed,"
+ " for file %s. Errno %s\n",
+ tmpname, strerror(errno) ));
+ }
+
+ if (fchmod(fd, 0644)==-1) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: fchmod failed for %s."
+ " Errno %s\n",
+ tmpname, strerror(errno) ));
+ unlink(tmpname);
+ close(fd);
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ ret = write(fd, file_contents, flen);
+ if (flen != ret) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: write failed,"
+ " returned %d (should be %u). Errno %s\n",
+ (int)ret, (unsigned int)flen, strerror(errno) ));
+ unlink(tmpname);
+ close(fd);
+ TALLOC_FREE(dname);
+ return False;
+ }
+ if (close(fd)==-1) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: close failed."
+ " Errno %s\n", strerror(errno) ));
+ unlink(tmpname);
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ if (rename(tmpname, fname) == -1) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: rename "
+ "of %s to %s failed. Errno %s\n",
+ tmpname, fname, strerror(errno) ));
+ unlink(tmpname);
+ TALLOC_FREE(dname);
+ return False;
+ }
+
+ DEBUG(5,("create_local_private_krb5_conf_for_domain: wrote "
+ "file %s with realm %s KDC list = %s\n",
+ fname, realm_upper, kdc_ip_string));
+
+ /* Set the environment variable to this file. */
+ setenv("KRB5_CONFIG", fname, 1);
+
+#if defined(OVERWRITE_SYSTEM_KRB5_CONF)
+
+#define SYSTEM_KRB5_CONF_PATH "/etc/krb5.conf"
+ /* Insanity, sheer insanity..... */
+
+ if (strequal(realm, lp_realm())) {
+ char linkpath[PATH_MAX+1];
+ int lret;
+
+ lret = readlink(SYSTEM_KRB5_CONF_PATH, linkpath, sizeof(linkpath)-1);
+ if (lret != -1) {
+ linkpath[lret] = '\0';
+ }
+
+ if (lret != -1 || strcmp(linkpath, fname) == 0) {
+ /* Symlink already exists. */
+ TALLOC_FREE(dname);
+ return True;
+ }
+
+ /* Try and replace with a symlink. */
+ if (symlink(fname, SYSTEM_KRB5_CONF_PATH) == -1) {
+ const char *newpath = SYSTEM_KRB5_CONF_PATH ## ".saved";
+ if (errno != EEXIST) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: symlink "
+ "of %s to %s failed. Errno %s\n",
+ fname, SYSTEM_KRB5_CONF_PATH, strerror(errno) ));
+ TALLOC_FREE(dname);
+ return True; /* Not a fatal error. */
+ }
+
+ /* Yes, this is a race conditon... too bad. */
+ if (rename(SYSTEM_KRB5_CONF_PATH, newpath) == -1) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: rename "
+ "of %s to %s failed. Errno %s\n",
+ SYSTEM_KRB5_CONF_PATH, newpath,
+ strerror(errno) ));
+ TALLOC_FREE(dname);
+ return True; /* Not a fatal error. */
+ }
+
+ if (symlink(fname, SYSTEM_KRB5_CONF_PATH) == -1) {
+ DEBUG(0,("create_local_private_krb5_conf_for_domain: "
+ "forced symlink of %s to /etc/krb5.conf failed. Errno %s\n",
+ fname, strerror(errno) ));
+ TALLOC_FREE(dname);
+ return True; /* Not a fatal error. */
+ }
+ }
+ }
+#endif
+
+ TALLOC_FREE(dname);
+
+ return True;
+}
#endif
git.samba.org / samba.git / blobdiff