}
-static bool ads_cleanup_expired_creds(krb5_context context,
- krb5_ccache ccache,
- krb5_creds *credsp)
-{
- krb5_error_code retval;
- const char *cc_type = krb5_cc_get_type(context, ccache);
-
- DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
- cc_type, krb5_cc_get_name(context, ccache),
- http_timestring(talloc_tos(), credsp->times.endtime)));
-
- /* we will probably need new tickets if the current ones
- will expire within 10 seconds.
- */
- if (credsp->times.endtime >= (time(NULL) + 10))
- return false;
-
- /* heimdal won't remove creds from a file ccache, and
- perhaps we shouldn't anyway, since internally we
- use memory ccaches, and a FILE one probably means that
- we're using creds obtained outside of our exectuable
- */
- if (strequal(cc_type, "FILE")) {
- DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
- return false;
- }
-
- retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
- if (retval) {
- DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
- error_message(retval)));
- /* If we have an error in this, we want to display it,
- but continue as though we deleted it */
- }
- return true;
-}
-
-/* Allocate and setup the auth context into the state we need. */
-
-static krb5_error_code setup_auth_context(krb5_context context,
- krb5_auth_context *auth_context)
-{
- krb5_error_code retval;
-
- retval = krb5_auth_con_init(context, auth_context );
- if (retval) {
- DEBUG(1,("krb5_auth_con_init failed (%s)\n",
- error_message(retval)));
- return retval;
- }
-
- /* Ensure this is an addressless ticket. */
- retval = krb5_auth_con_setaddrs(context, *auth_context, NULL, NULL);
- if (retval) {
- DEBUG(1,("krb5_auth_con_setaddrs failed (%s)\n",
- error_message(retval)));
- }
-
- return retval;
-}
-
-#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
-static krb5_error_code create_gss_checksum(krb5_data *in_data, /* [inout] */
- uint32_t gss_flags)
-{
- unsigned int orig_length = in_data->length;
- unsigned int base_cksum_size = GSSAPI_CHECKSUM_SIZE;
- char *gss_cksum = NULL;
-
- if (orig_length) {
- /* Extra length field for delgated ticket. */
- base_cksum_size += 4;
- }
-
- if ((unsigned int)base_cksum_size + orig_length <
- (unsigned int)base_cksum_size) {
- return EINVAL;
- }
-
- gss_cksum = (char *)SMB_MALLOC(base_cksum_size + orig_length);
- if (gss_cksum == NULL) {
- return ENOMEM;
- }
-
- memset(gss_cksum, '\0', base_cksum_size + orig_length);
- SIVAL(gss_cksum, 0, GSSAPI_BNDLENGTH);
-
- /*
- * GSS_C_NO_CHANNEL_BINDINGS means 16 zero bytes.
- * This matches the behavior of heimdal and mit.
- *
- * And it is needed to work against some closed source
- * SMB servers.
- *
- * See bug #7883
- */
- memset(&gss_cksum[4], 0x00, GSSAPI_BNDLENGTH);
-
- SIVAL(gss_cksum, 20, gss_flags);
-
- if (orig_length) {
- SSVAL(gss_cksum, 24, 1); /* The Delegation Option identifier */
- SSVAL(gss_cksum, 26, orig_length);
- /* Copy the kerberos KRB_CRED data */
- memcpy(gss_cksum + 28, in_data->data, orig_length);
- free(in_data->data);
- in_data->data = NULL;
- in_data->length = 0;
- }
- in_data->data = gss_cksum;
- in_data->length = base_cksum_size + orig_length;
- return 0;
-}
-#endif
-
/**************************************************************
krb5_parse_name that takes a UNIX charset.
**************************************************************/
return krb5_principal_compare_any_realm(context, princ1, princ2);
}
-/*
- we can't use krb5_mk_req because w2k wants the service to be in a particular format
-*/
-static krb5_error_code ads_krb5_mk_req(krb5_context context,
- krb5_auth_context *auth_context,
- const krb5_flags ap_req_options,
- const char *principal,
- krb5_ccache ccache,
- krb5_data *outbuf,
- time_t *expire_time,
- const char *impersonate_princ_s)
+/**
+ * @brief Free the contents of a krb5_data structure and zero the data field.
+ *
+ * @param[in] context The krb5 context
+ *
+ * @param[in] pdata The data structure to free contents of
+ *
+ * This function frees the contents, not the structure itself.
+ */
+void smb_krb5_free_data_contents(krb5_context context, krb5_data *pdata)
{
- krb5_error_code retval;
- krb5_principal server;
- krb5_principal impersonate_princ = NULL;
- krb5_creds * credsp;
- krb5_creds creds;
- krb5_data in_data;
- bool creds_ready = false;
- int i = 0, maxtries = 3;
-
- ZERO_STRUCT(in_data);
-
- retval = smb_krb5_parse_name(context, principal, &server);
- if (retval) {
- DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
- return retval;
+#if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
+ if (pdata->data) {
+ krb5_free_data_contents(context, pdata);
}
+#elif defined(HAVE_KRB5_DATA_FREE)
+ krb5_data_free(context, pdata);
+#else
+ SAFE_FREE(pdata->data);
+#endif
+}
- if (impersonate_princ_s) {
- retval = smb_krb5_parse_name(context, impersonate_princ_s,
- &impersonate_princ);
- if (retval) {
- DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", impersonate_princ_s));
- goto cleanup_princ;
+/*
+ * @brief copy a buffer into a krb5_data struct
+ *
+ * @param[in] p The krb5_data
+ * @param[in] data The data to copy
+ * @param[in] length The length of the data to copy
+ * @return krb5_error_code
+ *
+ * Caller has to free krb5_data with smb_krb5_free_data_contents().
+ */
+krb5_error_code smb_krb5_copy_data_contents(krb5_data *p,
+ const void *data,
+ size_t len)
+{
+#if defined(HAVE_KRB5_DATA_COPY)
+ return krb5_data_copy(p, data, len);
+#else
+ if (len) {
+ p->data = malloc(len);
+ if (p->data == NULL) {
+ return ENOMEM;
}
+ memmove(p->data, data, len);
+ } else {
+ p->data = NULL;
}
+ p->length = len;
+ p->magic = KV5M_DATA;
+ return 0;
+#endif
+}
- /* obtain ticket & session key */
- ZERO_STRUCT(creds);
- if ((retval = krb5_copy_principal(context, server, &creds.server))) {
- DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
- error_message(retval)));
- goto cleanup_princ;
+bool get_krb5_smb_session_key(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_auth_context auth_context,
+ DATA_BLOB *session_key, bool remote)
+{
+ krb5_keyblock *skey = NULL;
+ krb5_error_code err = 0;
+ bool ret = false;
+
+ if (remote) {
+#ifdef HAVE_KRB5_AUTH_CON_GETRECVSUBKEY
+ err = krb5_auth_con_getrecvsubkey(context,
+ auth_context,
+ &skey);
+#else /* HAVE_KRB5_AUTH_CON_GETRECVSUBKEY */
+ err = krb5_auth_con_getremotesubkey(context,
+ auth_context, &skey);
+#endif /* HAVE_KRB5_AUTH_CON_GETRECVSUBKEY */
+ } else {
+#ifdef HAVE_KRB5_AUTH_CON_GETSENDSUBKEY
+ err = krb5_auth_con_getsendsubkey(context,
+ auth_context,
+ &skey);
+#else /* HAVE_KRB5_AUTH_CON_GETSENDSUBKEY */
+ err = krb5_auth_con_getlocalsubkey(context,
+ auth_context, &skey);
+#endif /* HAVE_KRB5_AUTH_CON_GETSENDSUBKEY */
}
- if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
- /* This can commonly fail on smbd startup with no ticket in the cache.
- * Report at higher level than 1. */
- DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
- error_message(retval)));
- goto cleanup_creds;
+ if (err || skey == NULL) {
+ DEBUG(10, ("KRB5 error getting session key %d\n", err));
+ goto done;
}
- while (!creds_ready && (i < maxtries)) {
+ DEBUG(10, ("Got KRB5 session key of length %d\n",
+ (int)KRB5_KEY_LENGTH(skey)));
- if ((retval = smb_krb5_get_credentials(context, ccache,
- creds.client,
- creds.server,
- impersonate_princ,
- &credsp))) {
- DEBUG(1,("ads_krb5_mk_req: smb_krb5_get_credentials failed for %s (%s)\n",
- principal, error_message(retval)));
- goto cleanup_creds;
- }
+ *session_key = data_blob_talloc(mem_ctx,
+ KRB5_KEY_DATA(skey),
+ KRB5_KEY_LENGTH(skey));
+ dump_data_pw("KRB5 Session Key:\n",
+ session_key->data,
+ session_key->length);
- /* cope with ticket being in the future due to clock skew */
- if ((unsigned)credsp->times.starttime > time(NULL)) {
- time_t t = time(NULL);
- int time_offset =(int)((unsigned)credsp->times.starttime-t);
- DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
- krb5_set_real_time(context, t + time_offset + 1, 0);
- }
-
- if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
- creds_ready = true;
- }
+ ret = true;
- i++;
+done:
+ if (skey) {
+ krb5_free_keyblock(context, skey);
}
- DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
- principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
- http_timestring(talloc_tos(), (unsigned)credsp->times.endtime),
- (unsigned)credsp->times.endtime));
+ return ret;
+}
- if (expire_time) {
- *expire_time = (time_t)credsp->times.endtime;
+
+#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
+ const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
+
+ const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
+{
+ static krb5_data kdata;
+
+ kdata.data = discard_const_p(char, krb5_principal_get_comp_string(context, principal, i));
+ kdata.length = strlen((const char *)kdata.data);
+ return &kdata;
+}
+#endif
+
+/*
+ * @brief Get talloced string component of a principal
+ *
+ * @param[in] mem_ctx The TALLOC_CTX
+ * @param[in] context The krb5_context
+ * @param[in] principal The principal
+ * @param[in] component The component
+ * @return string component
+ *
+ * Caller must talloc_free if the return value is not NULL.
+ *
+ */
+
+/* caller has to free returned string with talloc_free() */
+char *smb_krb5_principal_get_comp_string(TALLOC_CTX *mem_ctx,
+ krb5_context context,
+ krb5_const_principal principal,
+ unsigned int component)
+{
+#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
+ return talloc_strdup(mem_ctx, krb5_principal_get_comp_string(context, principal, component));
+#else
+ krb5_data *data;
+
+ if (component >= krb5_princ_size(context, principal)) {
+ return NULL;
}
- /* Allocate the auth_context. */
- retval = setup_auth_context(context, auth_context);
- if (retval) {
- DEBUG(1,("setup_auth_context failed (%s)\n",
- error_message(retval)));
- goto cleanup_creds;
+ data = krb5_princ_component(context, principal, component);
+ if (data == NULL) {
+ return NULL;
}
-#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
- {
- uint32_t gss_flags = 0;
+ return talloc_strndup(mem_ctx, data->data, data->length);
+#endif
+}
- if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
- /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
- as part of the kerberos exchange. */
+/* Prototypes */
- DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
+ krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
+ const char *client_string, /* gd@BER.SUSE.DE */
+ const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
+ time_t *expire_time)
+{
+ krb5_error_code ret;
+ krb5_context context = NULL;
+ krb5_ccache ccache = NULL;
+ krb5_principal client = NULL;
+ krb5_creds creds, creds_in;
- retval = krb5_auth_con_setuseruserkey(context,
- *auth_context,
- &credsp->keyblock );
- if (retval) {
- DEBUG(1,("krb5_auth_con_setuseruserkey failed (%s)\n",
- error_message(retval)));
- goto cleanup_creds;
- }
+ ZERO_STRUCT(creds);
+ ZERO_STRUCT(creds_in);
- /* Must use a subkey for forwarded tickets. */
- retval = krb5_auth_con_setflags(context,
- *auth_context,
- KRB5_AUTH_CONTEXT_USE_SUBKEY);
- if (retval) {
- DEBUG(1,("krb5_auth_con_setflags failed (%s)\n",
- error_message(retval)));
- goto cleanup_creds;
- }
+ initialize_krb5_error_table();
+ ret = krb5_init_context(&context);
+ if (ret) {
+ goto done;
+ }
- retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
- *auth_context, /* Authentication context [in] */
- discard_const_p(char, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
- credsp->client, /* Client principal for the tgt [in] */
- credsp->server, /* Server principal for the tgt [in] */
- ccache, /* Credential cache to use for storage [in] */
- 1, /* Turn on for "Forwardable ticket" [in] */
- &in_data ); /* Resulting response [out] */
+ if (!ccache_string) {
+ ccache_string = krb5_cc_default_name(context);
+ }
- if (retval) {
- DEBUG( 3, ("krb5_fwd_tgt_creds failed (%s)\n",
- error_message( retval ) ) );
+ if (!ccache_string) {
+ ret = EINVAL;
+ goto done;
+ }
- /*
- * This is not fatal. Delete the *auth_context and continue
- * with krb5_mk_req_extended to get a non-forwardable ticket.
- */
+ DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
- if (in_data.data) {
- free( in_data.data );
- in_data.data = NULL;
- in_data.length = 0;
- }
- krb5_auth_con_free(context, *auth_context);
- *auth_context = NULL;
- retval = setup_auth_context(context, auth_context);
- if (retval) {
- DEBUG(1,("setup_auth_context failed (%s)\n",
- error_message(retval)));
- goto cleanup_creds;
- }
- } else {
- /* We got a delegated ticket. */
- gss_flags |= GSS_C_DELEG_FLAG;
- }
- }
+ /* FIXME: we should not fall back to defaults */
+ ret = krb5_cc_resolve(context, discard_const_p(char, ccache_string), &ccache);
+ if (ret) {
+ goto done;
+ }
- /* Frees and reallocates in_data into a GSS checksum blob. */
- retval = create_gss_checksum(&in_data, gss_flags);
- if (retval) {
- goto cleanup_data;
+ if (client_string) {
+ ret = smb_krb5_parse_name(context, client_string, &client);
+ if (ret) {
+ goto done;
}
-
- /* We always want GSS-checksum types. */
- retval = krb5_auth_con_set_req_cksumtype(context, *auth_context, GSSAPI_CHECKSUM );
- if (retval) {
- DEBUG(1,("krb5_auth_con_set_req_cksumtype failed (%s)\n",
- error_message(retval)));
- goto cleanup_data;
+ } else {
+ ret = krb5_cc_get_principal(context, ccache, &client);
+ if (ret) {
+ goto done;
}
}
-#endif
- retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
- &in_data, credsp, outbuf);
- if (retval) {
- DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
- error_message(retval)));
+ ret = krb5_get_renewed_creds(context, &creds, client, ccache, discard_const_p(char, service_string));
+ if (ret) {
+ DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
+ goto done;
}
-#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
-cleanup_data:
-#endif
-
- if (in_data.data) {
- free( in_data.data );
- in_data.length = 0;
+ /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
+ ret = krb5_cc_initialize(context, ccache, client);
+ if (ret) {
+ goto done;
}
- krb5_free_creds(context, credsp);
+ ret = krb5_cc_store_cred(context, ccache, &creds);
-cleanup_creds:
+ if (expire_time) {
+ *expire_time = (time_t) creds.times.endtime;
+ }
+
+done:
+ krb5_free_cred_contents(context, &creds_in);
krb5_free_cred_contents(context, &creds);
-cleanup_princ:
- krb5_free_principal(context, server);
- if (impersonate_princ) {
- krb5_free_principal(context, impersonate_princ);
+ if (client) {
+ krb5_free_principal(context, client);
+ }
+ if (ccache) {
+ krb5_cc_close(context, ccache);
+ }
+ if (context) {
+ krb5_free_context(context);
}
- return retval;
+ return ret;
}
-/**
- * @brief Free the contents of a krb5_data structure and zero the data field.
- *
- * @param[in] context The krb5 context
- *
- * @param[in] pdata The data structure to free contents of
- *
- * This function frees the contents, not the structure itself.
- */
-void smb_krb5_free_data_contents(krb5_context context, krb5_data *pdata)
+ krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
{
-#if defined(HAVE_KRB5_FREE_DATA_CONTENTS)
- if (pdata->data) {
- krb5_free_data_contents(context, pdata);
+ krb5_error_code ret = 0;
+ if (addr == NULL) {
+ return ret;
}
-#elif defined(HAVE_KRB5_DATA_FREE)
- krb5_data_free(context, pdata);
-#else
- SAFE_FREE(pdata->data);
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ krb5_free_addresses(context, addr->addrs);
+#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
+ ret = krb5_free_addresses(context, addr->addrs);
+ SAFE_FREE(addr->addrs);
#endif
+ SAFE_FREE(addr);
+ addr = NULL;
+ return ret;
}
-/*
- * @brief copy a buffer into a krb5_data struct
- *
- * @param[in] p The krb5_data
- * @param[in] data The data to copy
- * @param[in] length The length of the data to copy
- * @return krb5_error_code
- *
- * Caller has to free krb5_data with smb_krb5_free_data_contents().
- */
-krb5_error_code smb_krb5_copy_data_contents(krb5_data *p,
- const void *data,
- size_t len)
-{
-#if defined(HAVE_KRB5_DATA_COPY)
- return krb5_data_copy(p, data, len);
-#else
- if (len) {
- p->data = malloc(len);
- if (p->data == NULL) {
- return ENOMEM;
- }
- memmove(p->data, data, len);
- } else {
- p->data = NULL;
- }
- p->length = len;
- p->magic = KV5M_DATA;
- return 0;
-#endif
-}
-
-/*
- get a kerberos5 ticket for the given service
-*/
-int cli_krb5_get_ticket(TALLOC_CTX *mem_ctx,
- const char *principal, time_t time_offset,
- DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
- uint32_t extra_ap_opts, const char *ccname,
- time_t *tgs_expire,
- const char *impersonate_princ_s)
-
+#define MAX_NETBIOSNAME_LEN 16
+ krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr,
+ const char *netbios_name)
{
- krb5_error_code retval;
- krb5_data packet;
- krb5_context context = NULL;
- krb5_ccache ccdef = NULL;
- krb5_auth_context auth_context = NULL;
- krb5_enctype enc_types[] = {
-#ifdef HAVE_ENCTYPE_AES256_CTS_HMAC_SHA1_96
- ENCTYPE_AES256_CTS_HMAC_SHA1_96,
-#endif
-#ifdef HAVE_ENCTYPE_AES128_CTS_HMAC_SHA1_96
- ENCTYPE_AES128_CTS_HMAC_SHA1_96,
+ krb5_error_code ret = 0;
+ char buf[MAX_NETBIOSNAME_LEN];
+ int len;
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ krb5_address **addrs = NULL;
+#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
+ krb5_addresses *addrs = NULL;
#endif
- ENCTYPE_ARCFOUR_HMAC,
- ENCTYPE_DES_CBC_MD5,
- ENCTYPE_DES_CBC_CRC,
- ENCTYPE_NULL};
- initialize_krb5_error_table();
- retval = krb5_init_context(&context);
- if (retval) {
- DEBUG(1, ("krb5_init_context failed (%s)\n",
- error_message(retval)));
- goto failed;
- }
-
- if (time_offset != 0) {
- krb5_set_real_time(context, time(NULL) + time_offset, 0);
- }
-
- if ((retval = krb5_cc_resolve(context, ccname ?
- ccname : krb5_cc_default_name(context), &ccdef))) {
- DEBUG(1, ("krb5_cc_default failed (%s)\n",
- error_message(retval)));
- goto failed;
- }
-
- if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
- DEBUG(1, ("krb5_set_default_tgs_ktypes failed (%s)\n",
- error_message(retval)));
- goto failed;
+ *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
+ if (*kerb_addr == NULL) {
+ return ENOMEM;
}
- retval = ads_krb5_mk_req(context, &auth_context,
- AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
- principal, ccdef, &packet,
- tgs_expire, impersonate_princ_s);
- if (retval) {
- goto failed;
+ /* temporarily duplicate put_name() code here to avoid dependency
+ * issues for a 5 lines function */
+ len = strlen(netbios_name);
+ memcpy(buf, netbios_name,
+ (len < MAX_NETBIOSNAME_LEN) ? len : MAX_NETBIOSNAME_LEN - 1);
+ if (len < MAX_NETBIOSNAME_LEN - 1) {
+ memset(buf + len, ' ', MAX_NETBIOSNAME_LEN - 1 - len);
}
+ buf[MAX_NETBIOSNAME_LEN - 1] = 0x20;
- get_krb5_smb_session_key(mem_ctx, context, auth_context,
- session_key_krb5, false);
-
- *ticket = data_blob_talloc(mem_ctx, packet.data, packet.length);
-
- smb_krb5_free_data_contents(context, &packet);
+#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
+ {
+ int num_addr = 2;
-failed:
+ addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
+ if (addrs == NULL) {
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
- if (context) {
- if (ccdef)
- krb5_cc_close(context, ccdef);
- if (auth_context)
- krb5_auth_con_free(context, auth_context);
- krb5_free_context(context);
- }
+ memset(addrs, 0, sizeof(krb5_address *) * num_addr);
- return retval;
-}
+ addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
+ if (addrs[0] == NULL) {
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
-bool get_krb5_smb_session_key(TALLOC_CTX *mem_ctx,
- krb5_context context,
- krb5_auth_context auth_context,
- DATA_BLOB *session_key, bool remote)
-{
- krb5_keyblock *skey = NULL;
- krb5_error_code err = 0;
- bool ret = false;
+ addrs[0]->magic = KV5M_ADDRESS;
+ addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
+ addrs[0]->length = MAX_NETBIOSNAME_LEN;
+ addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
+ if (addrs[0]->contents == NULL) {
+ SAFE_FREE(addrs[0]);
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
- if (remote) {
-#ifdef HAVE_KRB5_AUTH_CON_GETRECVSUBKEY
- err = krb5_auth_con_getrecvsubkey(context,
- auth_context,
- &skey);
-#else /* HAVE_KRB5_AUTH_CON_GETRECVSUBKEY */
- err = krb5_auth_con_getremotesubkey(context,
- auth_context, &skey);
-#endif /* HAVE_KRB5_AUTH_CON_GETRECVSUBKEY */
- } else {
-#ifdef HAVE_KRB5_AUTH_CON_GETSENDSUBKEY
- err = krb5_auth_con_getsendsubkey(context,
- auth_context,
- &skey);
-#else /* HAVE_KRB5_AUTH_CON_GETSENDSUBKEY */
- err = krb5_auth_con_getlocalsubkey(context,
- auth_context, &skey);
-#endif /* HAVE_KRB5_AUTH_CON_GETSENDSUBKEY */
- }
+ memcpy(addrs[0]->contents, buf, addrs[0]->length);
- if (err || skey == NULL) {
- DEBUG(10, ("KRB5 error getting session key %d\n", err));
- goto done;
+ addrs[1] = NULL;
}
+#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
+ {
+ addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
+ if (addrs == NULL) {
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
- DEBUG(10, ("Got KRB5 session key of length %d\n",
- (int)KRB5_KEY_LENGTH(skey)));
+ memset(addrs, 0, sizeof(krb5_addresses));
- *session_key = data_blob_talloc(mem_ctx,
- KRB5_KEY_DATA(skey),
- KRB5_KEY_LENGTH(skey));
- dump_data_pw("KRB5 Session Key:\n",
- session_key->data,
- session_key->length);
+ addrs->len = 1;
+ addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
+ if (addrs->val == NULL) {
+ SAFE_FREE(addrs);
+ SAFE_FREE(kerb_addr);
+ return ENOMEM;
+ }
- ret = true;
+ addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
+ addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
+ addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
+ if (addrs->val[0].address.data == NULL) {
+ SAFE_FREE(addrs->val);
+ SAFE_FREE(addrs);
+ SAFE_FREE(*kerb_addr);
+ return ENOMEM;
+ }
-done:
- if (skey) {
- krb5_free_keyblock(context, skey);
+ memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
}
+#else
+#error UNKNOWN_KRB5_ADDRESS_FORMAT
+#endif
+ (*kerb_addr)->addrs = addrs;
return ret;
}
+ void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
+{
+#ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
+ krb5_free_error_contents(context, krberror);
+#else /* MIT */
+ krb5_free_error(context, krberror);
+#endif
+}
-#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING) && !defined(HAVE_KRB5_PRINC_COMPONENT)
- const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i );
-
- const krb5_data *krb5_princ_component(krb5_context context, krb5_principal principal, int i )
+ krb5_error_code handle_krberror_packet(krb5_context context,
+ krb5_data *packet)
{
- static krb5_data kdata;
+ krb5_error_code ret;
+ bool got_error_code = false;
- kdata.data = discard_const_p(char, krb5_principal_get_comp_string(context, principal, i));
- kdata.length = strlen((const char *)kdata.data);
- return &kdata;
-}
-#endif
+ DEBUG(10,("handle_krberror_packet: got error packet\n"));
-/*
- * @brief Get talloced string component of a principal
- *
- * @param[in] mem_ctx The TALLOC_CTX
- * @param[in] context The krb5_context
- * @param[in] principal The principal
- * @param[in] component The component
- * @return string component
- *
- * Caller must talloc_free if the return value is not NULL.
- *
- */
-
-/* caller has to free returned string with talloc_free() */
-char *smb_krb5_principal_get_comp_string(TALLOC_CTX *mem_ctx,
- krb5_context context,
- krb5_const_principal principal,
- unsigned int component)
-{
-#if defined(HAVE_KRB5_PRINCIPAL_GET_COMP_STRING)
- return talloc_strdup(mem_ctx, krb5_principal_get_comp_string(context, principal, component));
-#else
- krb5_data *data;
-
- if (component >= krb5_princ_size(context, principal)) {
- return NULL;
- }
-
- data = krb5_princ_component(context, principal, component);
- if (data == NULL) {
- return NULL;
- }
-
- return talloc_strndup(mem_ctx, data->data, data->length);
-#endif
-}
-
-/* Prototypes */
-
- krb5_error_code smb_krb5_renew_ticket(const char *ccache_string, /* FILE:/tmp/krb5cc_0 */
- const char *client_string, /* gd@BER.SUSE.DE */
- const char *service_string, /* krbtgt/BER.SUSE.DE@BER.SUSE.DE */
- time_t *expire_time)
-{
- krb5_error_code ret;
- krb5_context context = NULL;
- krb5_ccache ccache = NULL;
- krb5_principal client = NULL;
- krb5_creds creds, creds_in;
-
- ZERO_STRUCT(creds);
- ZERO_STRUCT(creds_in);
-
- initialize_krb5_error_table();
- ret = krb5_init_context(&context);
- if (ret) {
- goto done;
- }
-
- if (!ccache_string) {
- ccache_string = krb5_cc_default_name(context);
- }
-
- if (!ccache_string) {
- ret = EINVAL;
- goto done;
- }
-
- DEBUG(10,("smb_krb5_renew_ticket: using %s as ccache\n", ccache_string));
-
- /* FIXME: we should not fall back to defaults */
- ret = krb5_cc_resolve(context, discard_const_p(char, ccache_string), &ccache);
- if (ret) {
- goto done;
- }
-
- if (client_string) {
- ret = smb_krb5_parse_name(context, client_string, &client);
- if (ret) {
- goto done;
- }
- } else {
- ret = krb5_cc_get_principal(context, ccache, &client);
- if (ret) {
- goto done;
- }
- }
-
- ret = krb5_get_renewed_creds(context, &creds, client, ccache, discard_const_p(char, service_string));
- if (ret) {
- DEBUG(10,("smb_krb5_renew_ticket: krb5_get_kdc_cred failed: %s\n", error_message(ret)));
- goto done;
- }
-
- /* hm, doesn't that create a new one if the old one wasn't there? - Guenther */
- ret = krb5_cc_initialize(context, ccache, client);
- if (ret) {
- goto done;
- }
-
- ret = krb5_cc_store_cred(context, ccache, &creds);
-
- if (expire_time) {
- *expire_time = (time_t) creds.times.endtime;
- }
-
-done:
- krb5_free_cred_contents(context, &creds_in);
- krb5_free_cred_contents(context, &creds);
-
- if (client) {
- krb5_free_principal(context, client);
- }
- if (ccache) {
- krb5_cc_close(context, ccache);
- }
- if (context) {
- krb5_free_context(context);
- }
-
- return ret;
-}
-
- krb5_error_code smb_krb5_free_addresses(krb5_context context, smb_krb5_addresses *addr)
-{
- krb5_error_code ret = 0;
- if (addr == NULL) {
- return ret;
- }
-#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
- krb5_free_addresses(context, addr->addrs);
-#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
- ret = krb5_free_addresses(context, addr->addrs);
- SAFE_FREE(addr->addrs);
-#endif
- SAFE_FREE(addr);
- addr = NULL;
- return ret;
-}
-
-#define MAX_NETBIOSNAME_LEN 16
- krb5_error_code smb_krb5_gen_netbios_krb5_address(smb_krb5_addresses **kerb_addr,
- const char *netbios_name)
-{
- krb5_error_code ret = 0;
- char buf[MAX_NETBIOSNAME_LEN];
- int len;
-#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
- krb5_address **addrs = NULL;
-#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
- krb5_addresses *addrs = NULL;
-#endif
-
- *kerb_addr = (smb_krb5_addresses *)SMB_MALLOC(sizeof(smb_krb5_addresses));
- if (*kerb_addr == NULL) {
- return ENOMEM;
- }
-
- /* temporarily duplicate put_name() code here to avoid dependency
- * issues for a 5 lines function */
- len = strlen(netbios_name);
- memcpy(buf, netbios_name,
- (len < MAX_NETBIOSNAME_LEN) ? len : MAX_NETBIOSNAME_LEN - 1);
- if (len < MAX_NETBIOSNAME_LEN - 1) {
- memset(buf + len, ' ', MAX_NETBIOSNAME_LEN - 1 - len);
- }
- buf[MAX_NETBIOSNAME_LEN - 1] = 0x20;
-
-#if defined(HAVE_MAGIC_IN_KRB5_ADDRESS) && defined(HAVE_ADDRTYPE_IN_KRB5_ADDRESS) /* MIT */
- {
- int num_addr = 2;
-
- addrs = (krb5_address **)SMB_MALLOC(sizeof(krb5_address *) * num_addr);
- if (addrs == NULL) {
- SAFE_FREE(*kerb_addr);
- return ENOMEM;
- }
-
- memset(addrs, 0, sizeof(krb5_address *) * num_addr);
-
- addrs[0] = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
- if (addrs[0] == NULL) {
- SAFE_FREE(addrs);
- SAFE_FREE(*kerb_addr);
- return ENOMEM;
- }
-
- addrs[0]->magic = KV5M_ADDRESS;
- addrs[0]->addrtype = KRB5_ADDR_NETBIOS;
- addrs[0]->length = MAX_NETBIOSNAME_LEN;
- addrs[0]->contents = (unsigned char *)SMB_MALLOC(addrs[0]->length);
- if (addrs[0]->contents == NULL) {
- SAFE_FREE(addrs[0]);
- SAFE_FREE(addrs);
- SAFE_FREE(*kerb_addr);
- return ENOMEM;
- }
-
- memcpy(addrs[0]->contents, buf, addrs[0]->length);
-
- addrs[1] = NULL;
- }
-#elif defined(HAVE_ADDR_TYPE_IN_KRB5_ADDRESS) /* Heimdal */
- {
- addrs = (krb5_addresses *)SMB_MALLOC(sizeof(krb5_addresses));
- if (addrs == NULL) {
- SAFE_FREE(*kerb_addr);
- return ENOMEM;
- }
-
- memset(addrs, 0, sizeof(krb5_addresses));
-
- addrs->len = 1;
- addrs->val = (krb5_address *)SMB_MALLOC(sizeof(krb5_address));
- if (addrs->val == NULL) {
- SAFE_FREE(addrs);
- SAFE_FREE(kerb_addr);
- return ENOMEM;
- }
-
- addrs->val[0].addr_type = KRB5_ADDR_NETBIOS;
- addrs->val[0].address.length = MAX_NETBIOSNAME_LEN;
- addrs->val[0].address.data = (unsigned char *)SMB_MALLOC(addrs->val[0].address.length);
- if (addrs->val[0].address.data == NULL) {
- SAFE_FREE(addrs->val);
- SAFE_FREE(addrs);
- SAFE_FREE(*kerb_addr);
- return ENOMEM;
- }
-
- memcpy(addrs->val[0].address.data, buf, addrs->val[0].address.length);
- }
-#else
-#error UNKNOWN_KRB5_ADDRESS_FORMAT
-#endif
- (*kerb_addr)->addrs = addrs;
-
- return ret;
-}
-
- void smb_krb5_free_error(krb5_context context, krb5_error *krberror)
-{
-#ifdef HAVE_KRB5_FREE_ERROR_CONTENTS /* Heimdal */
- krb5_free_error_contents(context, krberror);
-#else /* MIT */
- krb5_free_error(context, krberror);
-#endif
-}
-
- krb5_error_code handle_krberror_packet(krb5_context context,
- krb5_data *packet)
-{
- krb5_error_code ret;
- bool got_error_code = false;
-
- DEBUG(10,("handle_krberror_packet: got error packet\n"));
-
-#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
- {
- krb5_error krberror;
+#ifdef HAVE_E_DATA_POINTER_IN_KRB5_ERROR /* Heimdal */
+ {
+ krb5_error krberror;
if ((ret = krb5_rd_error(context, packet, &krberror))) {
- DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
+ DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
error_message(ret)));
return ret;
}
krb5_error *krberror;
if ((ret = krb5_rd_error(context, packet, &krberror))) {
- DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
+ DEBUG(10,("handle_krberror_packet: krb5_rd_error failed with: %s\n",
error_message(ret)));
return ret;
}
}
#endif
if (got_error_code) {
- DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
+ DEBUG(5,("handle_krberror_packet: got KERBERR from kpasswd: %s (%d)\n",
error_message(ret), ret));
}
return ret;
/* caller needs to free etype_s */
krb5_error_code smb_krb5_enctype_to_string(krb5_context context,
- krb5_enctype enctype,
+ krb5_enctype enctype,
char **etype_s)
{
#ifdef HAVE_KRB5_ENCTYPE_TO_STRING_WITH_KRB5_CONTEXT_ARG
if ((strncmp(keytab_name_req, "WRFILE:/", 8) == 0) ||
(strncmp(keytab_name_req, "FILE:/", 6) == 0)) {
- tmp = keytab_name_req;
+ tmp = keytab_name_req;
goto resolve;
}
}
resolve:
- DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
+ DEBUG(10,("smb_krb5_open_keytab: resolving: %s\n", tmp));
ret = krb5_kt_resolve(context, tmp, keytab);
out:
- TALLOC_FREE(mem_ctx);
- return ret;
+ TALLOC_FREE(mem_ctx);
+ return ret;
}
krb5_error_code smb_krb5_open_keytab(krb5_context context,
#endif
}
+/**********************************************************
+ * ADS KRB5 CALLS
+ **********************************************************/
+
+static bool ads_cleanup_expired_creds(krb5_context context,
+ krb5_ccache ccache,
+ krb5_creds *credsp)
+{
+ krb5_error_code retval;
+ const char *cc_type = krb5_cc_get_type(context, ccache);
+
+ DEBUG(3, ("ads_cleanup_expired_creds: Ticket in ccache[%s:%s] expiration %s\n",
+ cc_type, krb5_cc_get_name(context, ccache),
+ http_timestring(talloc_tos(), credsp->times.endtime)));
+
+ /* we will probably need new tickets if the current ones
+ will expire within 10 seconds.
+ */
+ if (credsp->times.endtime >= (time(NULL) + 10))
+ return false;
+
+ /* heimdal won't remove creds from a file ccache, and
+ perhaps we shouldn't anyway, since internally we
+ use memory ccaches, and a FILE one probably means that
+ we're using creds obtained outside of our exectuable
+ */
+ if (strequal(cc_type, "FILE")) {
+ DEBUG(5, ("ads_cleanup_expired_creds: We do not remove creds from a %s ccache\n", cc_type));
+ return false;
+ }
+
+ retval = krb5_cc_remove_cred(context, ccache, 0, credsp);
+ if (retval) {
+ DEBUG(1, ("ads_cleanup_expired_creds: krb5_cc_remove_cred failed, err %s\n",
+ error_message(retval)));
+ /* If we have an error in this, we want to display it,
+ but continue as though we deleted it */
+ }
+ return true;
+}
+
+/* Allocate and setup the auth context into the state we need. */
+
+static krb5_error_code setup_auth_context(krb5_context context,
+ krb5_auth_context *auth_context)
+{
+ krb5_error_code retval;
+
+ retval = krb5_auth_con_init(context, auth_context );
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_init failed (%s)\n",
+ error_message(retval)));
+ return retval;
+ }
+
+ /* Ensure this is an addressless ticket. */
+ retval = krb5_auth_con_setaddrs(context, *auth_context, NULL, NULL);
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_setaddrs failed (%s)\n",
+ error_message(retval)));
+ }
+
+ return retval;
+}
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
+static krb5_error_code create_gss_checksum(krb5_data *in_data, /* [inout] */
+ uint32_t gss_flags)
+{
+ unsigned int orig_length = in_data->length;
+ unsigned int base_cksum_size = GSSAPI_CHECKSUM_SIZE;
+ char *gss_cksum = NULL;
+
+ if (orig_length) {
+ /* Extra length field for delgated ticket. */
+ base_cksum_size += 4;
+ }
+
+ if ((unsigned int)base_cksum_size + orig_length <
+ (unsigned int)base_cksum_size) {
+ return EINVAL;
+ }
+
+ gss_cksum = (char *)SMB_MALLOC(base_cksum_size + orig_length);
+ if (gss_cksum == NULL) {
+ return ENOMEM;
+ }
+
+ memset(gss_cksum, '\0', base_cksum_size + orig_length);
+ SIVAL(gss_cksum, 0, GSSAPI_BNDLENGTH);
+
+ /*
+ * GSS_C_NO_CHANNEL_BINDINGS means 16 zero bytes.
+ * This matches the behavior of heimdal and mit.
+ *
+ * And it is needed to work against some closed source
+ * SMB servers.
+ *
+ * See bug #7883
+ */
+ memset(&gss_cksum[4], 0x00, GSSAPI_BNDLENGTH);
+
+ SIVAL(gss_cksum, 20, gss_flags);
+
+ if (orig_length) {
+ SSVAL(gss_cksum, 24, 1); /* The Delegation Option identifier */
+ SSVAL(gss_cksum, 26, orig_length);
+ /* Copy the kerberos KRB_CRED data */
+ memcpy(gss_cksum + 28, in_data->data, orig_length);
+ free(in_data->data);
+ in_data->data = NULL;
+ in_data->length = 0;
+ }
+ in_data->data = gss_cksum;
+ in_data->length = base_cksum_size + orig_length;
+ return 0;
+}
+#endif
+
+/*
+ we can't use krb5_mk_req because w2k wants the service to be in a particular format
+*/
+static krb5_error_code ads_krb5_mk_req(krb5_context context,
+ krb5_auth_context *auth_context,
+ const krb5_flags ap_req_options,
+ const char *principal,
+ krb5_ccache ccache,
+ krb5_data *outbuf,
+ time_t *expire_time,
+ const char *impersonate_princ_s)
+{
+ krb5_error_code retval;
+ krb5_principal server;
+ krb5_principal impersonate_princ = NULL;
+ krb5_creds * credsp;
+ krb5_creds creds;
+ krb5_data in_data;
+ bool creds_ready = false;
+ int i = 0, maxtries = 3;
+
+ ZERO_STRUCT(in_data);
+
+ retval = smb_krb5_parse_name(context, principal, &server);
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", principal));
+ return retval;
+ }
+
+ if (impersonate_princ_s) {
+ retval = smb_krb5_parse_name(context, impersonate_princ_s,
+ &impersonate_princ);
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: Failed to parse principal %s\n", impersonate_princ_s));
+ goto cleanup_princ;
+ }
+ }
+
+ /* obtain ticket & session key */
+ ZERO_STRUCT(creds);
+ if ((retval = krb5_copy_principal(context, server, &creds.server))) {
+ DEBUG(1,("ads_krb5_mk_req: krb5_copy_principal failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_princ;
+ }
+
+ if ((retval = krb5_cc_get_principal(context, ccache, &creds.client))) {
+ /* This can commonly fail on smbd startup with no ticket in the cache.
+ * Report at higher level than 1. */
+ DEBUG(3,("ads_krb5_mk_req: krb5_cc_get_principal failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ while (!creds_ready && (i < maxtries)) {
+
+ if ((retval = smb_krb5_get_credentials(context, ccache,
+ creds.client,
+ creds.server,
+ impersonate_princ,
+ &credsp))) {
+ DEBUG(1,("ads_krb5_mk_req: smb_krb5_get_credentials failed for %s (%s)\n",
+ principal, error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ /* cope with ticket being in the future due to clock skew */
+ if ((unsigned)credsp->times.starttime > time(NULL)) {
+ time_t t = time(NULL);
+ int time_offset =(int)((unsigned)credsp->times.starttime-t);
+ DEBUG(4,("ads_krb5_mk_req: Advancing clock by %d seconds to cope with clock skew\n", time_offset));
+ krb5_set_real_time(context, t + time_offset + 1, 0);
+ }
+
+ if (!ads_cleanup_expired_creds(context, ccache, credsp)) {
+ creds_ready = true;
+ }
+
+ i++;
+ }
+
+ DEBUG(10,("ads_krb5_mk_req: Ticket (%s) in ccache (%s:%s) is valid until: (%s - %u)\n",
+ principal, krb5_cc_get_type(context, ccache), krb5_cc_get_name(context, ccache),
+ http_timestring(talloc_tos(), (unsigned)credsp->times.endtime),
+ (unsigned)credsp->times.endtime));
+
+ if (expire_time) {
+ *expire_time = (time_t)credsp->times.endtime;
+ }
+
+ /* Allocate the auth_context. */
+ retval = setup_auth_context(context, auth_context);
+ if (retval) {
+ DEBUG(1,("setup_auth_context failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
+ {
+ uint32_t gss_flags = 0;
+
+ if( credsp->ticket_flags & TKT_FLG_OK_AS_DELEGATE ) {
+ /* Fetch a forwarded TGT from the KDC so that we can hand off a 2nd ticket
+ as part of the kerberos exchange. */
+
+ DEBUG( 3, ("ads_krb5_mk_req: server marked as OK to delegate to, building forwardable TGT\n") );
+
+ retval = krb5_auth_con_setuseruserkey(context,
+ *auth_context,
+ &credsp->keyblock );
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_setuseruserkey failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ /* Must use a subkey for forwarded tickets. */
+ retval = krb5_auth_con_setflags(context,
+ *auth_context,
+ KRB5_AUTH_CONTEXT_USE_SUBKEY);
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_setflags failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+
+ retval = krb5_fwd_tgt_creds(context,/* Krb5 context [in] */
+ *auth_context, /* Authentication context [in] */
+ discard_const_p(char, KRB5_TGS_NAME), /* Ticket service name ("krbtgt") [in] */
+ credsp->client, /* Client principal for the tgt [in] */
+ credsp->server, /* Server principal for the tgt [in] */
+ ccache, /* Credential cache to use for storage [in] */
+ 1, /* Turn on for "Forwardable ticket" [in] */
+ &in_data ); /* Resulting response [out] */
+
+ if (retval) {
+ DEBUG( 3, ("krb5_fwd_tgt_creds failed (%s)\n",
+ error_message( retval ) ) );
+
+ /*
+ * This is not fatal. Delete the *auth_context and continue
+ * with krb5_mk_req_extended to get a non-forwardable ticket.
+ */
+
+ if (in_data.data) {
+ free( in_data.data );
+ in_data.data = NULL;
+ in_data.length = 0;
+ }
+ krb5_auth_con_free(context, *auth_context);
+ *auth_context = NULL;
+ retval = setup_auth_context(context, auth_context);
+ if (retval) {
+ DEBUG(1,("setup_auth_context failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_creds;
+ }
+ } else {
+ /* We got a delegated ticket. */
+ gss_flags |= GSS_C_DELEG_FLAG;
+ }
+ }
+
+ /* Frees and reallocates in_data into a GSS checksum blob. */
+ retval = create_gss_checksum(&in_data, gss_flags);
+ if (retval) {
+ goto cleanup_data;
+ }
+
+ /* We always want GSS-checksum types. */
+ retval = krb5_auth_con_set_req_cksumtype(context, *auth_context, GSSAPI_CHECKSUM );
+ if (retval) {
+ DEBUG(1,("krb5_auth_con_set_req_cksumtype failed (%s)\n",
+ error_message(retval)));
+ goto cleanup_data;
+ }
+ }
+#endif
+
+ retval = krb5_mk_req_extended(context, auth_context, ap_req_options,
+ &in_data, credsp, outbuf);
+ if (retval) {
+ DEBUG(1,("ads_krb5_mk_req: krb5_mk_req_extended failed (%s)\n",
+ error_message(retval)));
+ }
+
+#if defined(TKT_FLG_OK_AS_DELEGATE ) && defined(HAVE_KRB5_AUTH_CON_SETUSERUSERKEY) && defined(KRB5_AUTH_CONTEXT_USE_SUBKEY) && defined(HAVE_KRB5_AUTH_CON_SET_REQ_CKSUMTYPE)
+cleanup_data:
+#endif
+
+ if (in_data.data) {
+ free( in_data.data );
+ in_data.length = 0;
+ }
+
+ krb5_free_creds(context, credsp);
+
+cleanup_creds:
+ krb5_free_cred_contents(context, &creds);
+
+cleanup_princ:
+ krb5_free_principal(context, server);
+ if (impersonate_princ) {
+ krb5_free_principal(context, impersonate_princ);
+ }
+
+ return retval;
+}
+
+/*
+ get a kerberos5 ticket for the given service
+*/
+int cli_krb5_get_ticket(TALLOC_CTX *mem_ctx,
+ const char *principal, time_t time_offset,
+ DATA_BLOB *ticket, DATA_BLOB *session_key_krb5,
+ uint32_t extra_ap_opts, const char *ccname,
+ time_t *tgs_expire,
+ const char *impersonate_princ_s)
+
+{
+ krb5_error_code retval;
+ krb5_data packet;
+ krb5_context context = NULL;
+ krb5_ccache ccdef = NULL;
+ krb5_auth_context auth_context = NULL;
+ krb5_enctype enc_types[] = {
+#ifdef HAVE_ENCTYPE_AES256_CTS_HMAC_SHA1_96
+ ENCTYPE_AES256_CTS_HMAC_SHA1_96,
+#endif
+#ifdef HAVE_ENCTYPE_AES128_CTS_HMAC_SHA1_96
+ ENCTYPE_AES128_CTS_HMAC_SHA1_96,
+#endif
+ ENCTYPE_ARCFOUR_HMAC,
+ ENCTYPE_DES_CBC_MD5,
+ ENCTYPE_DES_CBC_CRC,
+ ENCTYPE_NULL};
+
+ initialize_krb5_error_table();
+ retval = krb5_init_context(&context);
+ if (retval) {
+ DEBUG(1, ("krb5_init_context failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ if (time_offset != 0) {
+ krb5_set_real_time(context, time(NULL) + time_offset, 0);
+ }
+
+ if ((retval = krb5_cc_resolve(context, ccname ?
+ ccname : krb5_cc_default_name(context), &ccdef))) {
+ DEBUG(1, ("krb5_cc_default failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ if ((retval = krb5_set_default_tgs_ktypes(context, enc_types))) {
+ DEBUG(1, ("krb5_set_default_tgs_ktypes failed (%s)\n",
+ error_message(retval)));
+ goto failed;
+ }
+
+ retval = ads_krb5_mk_req(context, &auth_context,
+ AP_OPTS_USE_SUBKEY | (krb5_flags)extra_ap_opts,
+ principal, ccdef, &packet,
+ tgs_expire, impersonate_princ_s);
+ if (retval) {
+ goto failed;
+ }
+
+ get_krb5_smb_session_key(mem_ctx, context, auth_context,
+ session_key_krb5, false);
+
+ *ticket = data_blob_talloc(mem_ctx, packet.data, packet.length);
+
+ smb_krb5_free_data_contents(context, &packet);
+
+failed:
+
+ if (context) {
+ if (ccdef)
+ krb5_cc_close(context, ccdef);
+ if (auth_context)
+ krb5_auth_con_free(context, auth_context);
+ krb5_free_context(context);
+ }
+
+ return retval;
+}
+
#else /* HAVE_KRB5 */
/* this saves a few linking headaches */
int cli_krb5_get_ticket(TALLOC_CTX *mem_ctx,
git.samba.org / kai / samba-autobuild / .git / commitdiff