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freeipa/client/ipa-join.c
Rob Crittenden 61650c577f Re-work the quiet option in ipa-join to not suppress errors 
The quiet option was supposed to suppress unnecessary output
on successful invocations. Instead it was suppressing most
error messages as well.

Remove all the quiet checks when an error would be displayed.

Pass the quiet option to ipa-getkeytab so it honors the
request as well.

Also tidy up some of the debug output.

https://pagure.io/freeipa/issue/9105

Signed-off-by: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
2022-02-09 10:48:06 -05:00

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/* Authors: Rob Crittenden <rcritten@redhat.com>
*
* Copyright (C) 2009 Red Hat
* see file 'COPYING' for use and warranty information
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* 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, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include "config.h"
#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <sys/utsname.h>
#include <krb5.h>
/* Doesn't work w/mozldap */
#include <ldap.h>
#include <popt.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <limits.h>
#ifdef WITH_IPA_JOIN_XML
#include "xmlrpc-c/base.h"
#include "xmlrpc-c/client.h"
#else
#include <curl/curl.h>
#include <jansson.h>
#endif
#include "ipa-client-common.h"
#include "ipa_ldap.h"
#include "ipa_hostname.h"
#define NAME "ipa-join"
#define JOIN_OID "2.16.840.1.113730.3.8.10.3"
#define IPA_CONFIG "/etc/ipa/default.conf"
char * read_config_file(const char *filename);
char * get_config_entry(char * data, const char *section, const char *key);
static int debug = 0;
#define ASPRINTF(strp, fmt...) \
if (asprintf(strp, fmt) == -1) { \
fprintf(stderr, _("Out of memory!\n")); \
rval = 3; \
goto cleanup; \
}
/*
* Translate some IPA exceptions into specific errors in this context.
*/
#ifdef WITH_IPA_JOIN_XML
static int
handle_fault(xmlrpc_env * const envP) {
if (envP->fault_occurred) {
switch(envP->fault_code) {
case 2100: /* unable to add new host entry or write objectClass */
fprintf(stderr,
_("No permission to join this host to the IPA domain.\n"));
break;
default:
fprintf(stderr, "%s\n", envP->fault_string);
}
return 1;
}
return 0;
}
#endif
/* Get the IPA server from the configuration file.
* The caller is responsible for freeing this value
*/
static char *
getIPAserver(char * data) {
return get_config_entry(data, "global", "server");
}
/* Make sure that the keytab is writable before doing anything */
static int check_perms(const char *keytab)
{
int ret;
int fd;
ret = access(keytab, W_OK);
if (ret == -1) {
switch(errno) {
case EACCES:
fprintf(stderr,
_("No write permissions on keytab file '%s'\n"),
keytab);
break;
case ENOENT:
/* file doesn't exist, lets touch it and see if writable */
fd = open(keytab, O_WRONLY | O_CREAT, 0600);
if (fd != -1) {
close(fd);
unlink(keytab);
return 0;
}
fprintf(stderr,
_("No write permissions on keytab file '%s'\n"),
keytab);
break;
default:
fprintf(stderr,
_("access() on %1$s failed: errno = %2$d\n"),
keytab, errno);
break;
}
return 1;
}
return 0;
}
/*
* There is no API in xmlrpc-c to set arbitrary headers but we can fake it
* by using a specially-crafted User-Agent string.
*
* The caller is responsible for freeing the return value.
*/
#ifdef WITH_IPA_JOIN_XML
char *
set_user_agent(const char *ipaserver) {
int ret;
char *user_agent = NULL;
ret = asprintf(&user_agent, "%s/%s\r\nReferer: https://%s/ipa/xml\r\nX-Original-User-Agent:", NAME, VERSION, ipaserver);
if (ret == -1) {
fprintf(stderr, _("Out of memory!"));
return NULL;
}
return user_agent;
}
/*
* Make an XML-RPC call to methodName. This uses the curl client to make
* a connection over SSL using the CA cert that should have been installed
* by ipa-client-install.
*/
static void
callRPC(char * user_agent,
xmlrpc_env * const envP,
xmlrpc_server_info * const serverInfoP,
const char * const methodName,
xmlrpc_value * const paramArrayP,
xmlrpc_value ** const resultPP) {
struct xmlrpc_clientparms clientparms;
struct xmlrpc_curl_xportparms * curlXportParmsP = NULL;
xmlrpc_client * clientP = NULL;
memset(&clientparms, 0, sizeof(clientparms));
XMLRPC_ASSERT(xmlrpc_value_type(paramArrayP) == XMLRPC_TYPE_ARRAY);
curlXportParmsP = malloc(sizeof(*curlXportParmsP));
if (curlXportParmsP == NULL) {
xmlrpc_env_set_fault(envP, XMLRPC_INTERNAL_ERROR, _("Out of memory!"));
return;
}
memset(curlXportParmsP, 0, sizeof(*curlXportParmsP));
/* Have curl do SSL certificate validation */
curlXportParmsP->no_ssl_verifypeer = 0;
curlXportParmsP->no_ssl_verifyhost = 0;
curlXportParmsP->cainfo = DEFAULT_CA_CERT_FILE;
curlXportParmsP->user_agent = user_agent;
clientparms.transport = "curl";
clientparms.transportparmsP = (struct xmlrpc_xportparms *)
curlXportParmsP;
clientparms.transportparm_size = XMLRPC_CXPSIZE(cainfo);
xmlrpc_client_create(envP, XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION,
&clientparms, sizeof(clientparms),
&clientP);
/* Set up kerberos negotiate authentication in curl. */
xmlrpc_server_info_set_user(envP, serverInfoP, ":", "");
xmlrpc_server_info_allow_auth_negotiate(envP, serverInfoP);
/* Perform the XML-RPC call */
if (!envP->fault_occurred) {
xmlrpc_client_call2(envP, clientP, serverInfoP, methodName, paramArrayP, resultPP);
}
/* Cleanup */
xmlrpc_server_info_free(serverInfoP);
xmlrpc_client_destroy(clientP);
free((void*)clientparms.transportparmsP);
}
#endif
/* The caller is responsible for unbinding the connection if ld is not NULL */
static LDAP *
connect_ldap(const char *hostname, const char *binddn, const char *bindpw,
int *ret) {
LDAP *ld = NULL;
int ldapdebug = 2;
char *uri = NULL;
struct berval bindpw_bv;
*ret = ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &ldapdebug);
if (*ret != LDAP_OPT_SUCCESS) {
goto fail;
}
*ret = asprintf(&uri, "ldaps://%s:636", hostname);
if (*ret == -1) {
fprintf(stderr, _("Out of memory!"));
*ret = LDAP_NO_MEMORY;
goto fail;
}
*ret = ipa_ldap_init(&ld, uri);
if (*ret != LDAP_SUCCESS) {
goto fail;
}
*ret = ipa_tls_ssl_init(ld, uri, DEFAULT_CA_CERT_FILE);
if (*ret != LDAP_SUCCESS) {
fprintf(stderr, _("Unable to enable SSL in LDAP\n"));
goto fail;
}
free(uri);
uri = NULL;
if (bindpw) {
bindpw_bv.bv_val = discard_const(bindpw);
bindpw_bv.bv_len = strlen(bindpw);
} else {
bindpw_bv.bv_val = NULL;
bindpw_bv.bv_len = 0;
}
*ret = ldap_sasl_bind_s(ld, binddn, LDAP_SASL_SIMPLE, &bindpw_bv,
NULL, NULL, NULL);
if (*ret != LDAP_SUCCESS) {
ipa_ldap_error(ld, *ret, _("SASL Bind failed\n"));
goto fail;
}
return ld;
fail:
if (ld != NULL) {
ldap_unbind_ext(ld, NULL, NULL);
}
if (uri != NULL) {
free(uri);
}
return NULL;
}
/*
* Given a list of naming contexts check each one to see if it has
* an IPA v2 server in it. The first one we find wins.
*/
static int
check_ipa_server(LDAP *ld, char **ldap_base, struct berval **vals)
{
struct berval **infovals;
LDAPMessage *entry, *res = NULL;
char *info_attrs[] = {"info", NULL};
int i, ret = 0;
for (i = 0; !*ldap_base && vals[i]; i++) {
ret = ldap_search_ext_s(ld, vals[i]->bv_val,
LDAP_SCOPE_BASE, "(info=IPA*)", info_attrs,
0, NULL, NULL, NULL, 0, &res);
if (ret != LDAP_SUCCESS) {
break;
}
entry = ldap_first_entry(ld, res);
infovals = ldap_get_values_len(ld, entry, info_attrs[0]);
if (strcmp(infovals[0]->bv_val, "IPA V2.0") == 0)
*ldap_base = strdup(vals[i]->bv_val);
ldap_msgfree(res);
res = NULL;
}
return ret;
}
/*
* Determine the baseDN of the remote server. Look first for a
* defaultNamingContext, otherwise fall back to reviewing each
* namingContext.
*/
static int
get_root_dn(const char *ipaserver, char **ldap_base)
{
LDAP *ld = NULL;
char *root_attrs[] = {"namingContexts", "defaultNamingContext", NULL};
LDAPMessage *entry, *res = NULL;
struct berval **ncvals;
struct berval **defvals;
int ret, rval = 0;
ld = connect_ldap(ipaserver, NULL, NULL, &ret);
if (!ld) {
rval = 14;
goto done;
}
ret = ldap_search_ext_s(ld, "", LDAP_SCOPE_BASE,
"objectclass=*", root_attrs, 0,
NULL, NULL, NULL, 0, &res);
if (ret != LDAP_SUCCESS) {
fprintf(stderr, _("Search for %1$s on rootdse failed with error %2$d\n"),
root_attrs[0], ret);
rval = 14;
goto done;
}
*ldap_base = NULL;
entry = ldap_first_entry(ld, res);
defvals = ldap_get_values_len(ld, entry, root_attrs[1]);
if (defvals) {
ret = check_ipa_server(ld, ldap_base, defvals);
}
ldap_value_free_len(defvals);
/* loop through to find the IPA context */
if (ret == LDAP_SUCCESS && !*ldap_base) {
ncvals = ldap_get_values_len(ld, entry, root_attrs[0]);
if (!ncvals) {
fprintf(stderr, _("No values for %s"), root_attrs[0]);
rval = 14;
ldap_value_free_len(ncvals);
goto done;
}
ret = check_ipa_server(ld, ldap_base, ncvals);
ldap_value_free_len(ncvals);
}
if (ret != LDAP_SUCCESS) {
fprintf(stderr, _("Search for IPA namingContext failed with error %d\n"), ret);
rval = 14;
goto done;
}
if (!*ldap_base) {
fprintf(stderr, _("IPA namingContext not found\n"));
rval = 14;
goto done;
}
done:
if (res) ldap_msgfree(res);
if (ld != NULL) {
ldap_unbind_ext(ld, NULL, NULL);
}
return rval;
}
/* Join a host to the current IPA realm.
*
* There are several scenarios for this:
* 1. You are an IPA admin user with fullrights to add hosts and generate
* keytabs.
* 2. You are an IPA admin user with rights to generate keytabs but not
* write hosts.
* 3. You are a regular IPA user with a password that can be used to
* generate the host keytab.
*
* If a password is presented it will be used regardless of the rights of
* the user.
*/
/* If we only have a bindpw then try to join in a bit of a degraded mode.
* This is going to duplicate some of the server-side code to determine
* the state of the entry.
*/
static int
join_ldap(const char *ipaserver, const char *hostname, char ** binddn, const char *bindpw, const char *basedn, const char **princ, bool quiet)
{
LDAP *ld;
int rval = 0;
char *oidresult = NULL;
struct berval valrequest;
struct berval *valresult = NULL;
int rc, ret;
char *ldap_base = NULL;
*binddn = NULL;
*princ = NULL;
if (NULL != basedn) {
ldap_base = strdup(basedn);
if (!ldap_base) {
fprintf(stderr, _("Out of memory!\n"));
rval = 3;
goto done;
}
} else {
if (get_root_dn(ipaserver, &ldap_base) != 0) {
fprintf(stderr, _("Unable to determine root DN of %s\n"),
ipaserver);
rval = 14;
goto done;
} else {
if (debug) {
fprintf(stderr, "root DN %s\n", ldap_base);
}
}
}
ret = asprintf(binddn, "fqdn=%s,cn=computers,cn=accounts,%s", hostname, ldap_base);
if (ret == -1)
{
fprintf(stderr, _("Out of memory!\n"));
rval = 3;
goto done;
}
if (debug) {
fprintf(stderr, "Connecting to %s as %s\n", ipaserver, *binddn);
}
ld = connect_ldap(ipaserver, *binddn, bindpw, &ret);
if (ld == NULL) {
switch(ret) {
case LDAP_NO_MEMORY:
rval = 3;
break;
case LDAP_INVALID_CREDENTIALS: /* incorrect password */
case LDAP_INAPPROPRIATE_AUTH: /* no password set */
rval = 15;
break;
default: /* LDAP connection error catch-all */
rval = 14;
break;
}
goto done;
}
valrequest.bv_val = (char *)hostname;
valrequest.bv_len = strlen(hostname);
if ((rc = ldap_extended_operation_s(ld, JOIN_OID, &valrequest, NULL, NULL, &oidresult, &valresult)) != LDAP_SUCCESS) {
char *s = NULL;
#ifdef LDAP_OPT_DIAGNOSTIC_MESSAGE
ldap_get_option(ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, &s);
#else
ldap_get_option(ld, LDAP_OPT_ERROR_STRING, &s);
#endif
fprintf(stderr, _("Enrollment failed. %s\n"), s);
if (debug) {
fprintf(stderr, "ldap_extended_operation_s failed: %s",
ldap_err2string(rc));
}
rval = 13;
goto ldap_done;
}
/* Get the value from the result returned by the server. */
*princ = strdup(valresult->bv_val);
ldap_done:
if (ld != NULL) {
ldap_unbind_ext(ld, NULL, NULL);
}
done:
free(ldap_base);
if (valresult) ber_bvfree(valresult);
if (oidresult) free(oidresult);
return rval;
}
#ifdef WITH_IPA_JOIN_XML
static int
join_krb5_xmlrpc(const char *ipaserver, const char *hostname, char **hostdn, const char **princ, bool force, bool quiet) {
xmlrpc_env env;
xmlrpc_value * argArrayP = NULL;
xmlrpc_value * paramArrayP = NULL;
xmlrpc_value * paramP = NULL;
xmlrpc_value * optionsP = NULL;
xmlrpc_value * resultP = NULL;
xmlrpc_value * structP = NULL;
xmlrpc_server_info * serverInfoP = NULL;
struct utsname uinfo;
xmlrpc_value *princP = NULL;
xmlrpc_value *krblastpwdchangeP = NULL;
xmlrpc_value *hostdnP = NULL;
const char *krblastpwdchange = NULL;
char * url = NULL;
char * user_agent = NULL;
int rval = 0;
int ret;
*hostdn = NULL;
*princ = NULL;
/* Start up our XML-RPC client library. */
xmlrpc_client_init(XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION);
uname(&uinfo);
xmlrpc_env_init(&env);
xmlrpc_client_setup_global_const(&env);
#if 1
ret = asprintf(&url, "https://%s:443/ipa/xml", ipaserver);
#else
ret = asprintf(&url, "http://%s:8888/", ipaserver);
#endif
if (ret == -1)
{
fprintf(stderr, _("Out of memory!\n"));
rval = 3;
goto cleanup;
}
serverInfoP = xmlrpc_server_info_new(&env, url);
argArrayP = xmlrpc_array_new(&env);
paramArrayP = xmlrpc_array_new(&env);
paramP = xmlrpc_string_new(&env, hostname);
xmlrpc_array_append_item(&env, argArrayP, paramP);
#ifdef REALM
if (!quiet)
printf("Joining %s to IPA realm %s\n", hostname, iparealm);
#endif
xmlrpc_array_append_item(&env, paramArrayP, argArrayP);
xmlrpc_DECREF(paramP);
optionsP = xmlrpc_build_value(&env, "{s:s,s:s}",
"nsosversion", uinfo.release,
"nshardwareplatform", uinfo.machine);
xmlrpc_array_append_item(&env, paramArrayP, optionsP);
xmlrpc_DECREF(optionsP);
if ((user_agent = set_user_agent(ipaserver)) == NULL) {
rval = 3;
goto cleanup;
}
callRPC(user_agent, &env, serverInfoP, "join", paramArrayP, &resultP);
if (handle_fault(&env)) {
rval = 17;
goto cleanup_xmlrpc;
}
/* Return value is the form of an array. The first value is the
* DN, the second a struct of attribute values
*/
xmlrpc_array_read_item(&env, resultP, 0, &hostdnP);
xmlrpc_read_string(&env, hostdnP, (const char **)hostdn);
xmlrpc_DECREF(hostdnP);
xmlrpc_array_read_item(&env, resultP, 1, &structP);
xmlrpc_struct_find_value(&env, structP, "krbprincipalname", &princP);
if (princP) {
xmlrpc_value * singleprincP = NULL;
/* FIXME: all values are returned as lists currently. Once this is
* fixed we can read the string directly.
*/
xmlrpc_array_read_item(&env, princP, 0, &singleprincP);
xmlrpc_read_string(&env, singleprincP, &*princ);
xmlrpc_DECREF(princP);
xmlrpc_DECREF(singleprincP);
} else {
fprintf(stderr, _("principal not found in XML-RPC response\n"));
rval = 12;
goto cleanup;
}
xmlrpc_struct_find_value(&env, structP, "krblastpwdchange", &krblastpwdchangeP);
if (krblastpwdchangeP && !force) {
xmlrpc_value * singleprincP = NULL;
/* FIXME: all values are returned as lists currently. Once this is
* fixed we can read the string directly.
*/
xmlrpc_array_read_item(&env, krblastpwdchangeP, 0, &singleprincP);
xmlrpc_read_string(&env, singleprincP, &krblastpwdchange);
xmlrpc_DECREF(krblastpwdchangeP);
fprintf(stderr, _("Host is already joined.\n"));
rval = 13;
goto cleanup;
}
cleanup:
if (argArrayP) xmlrpc_DECREF(argArrayP);
if (paramArrayP) xmlrpc_DECREF(paramArrayP);
if (resultP) xmlrpc_DECREF(resultP);
cleanup_xmlrpc:
free(user_agent);
free(url);
free((char *)krblastpwdchange);
xmlrpc_env_clean(&env);
xmlrpc_client_cleanup();
return rval;
}
#else // ifdef WITH_IPA_JOIN_XML
static inline struct curl_slist *
curl_slist_append_log(struct curl_slist *list, char *string, bool quiet) {
list = curl_slist_append(list, string);
if (!list) {
fprintf(stderr, _("curl_slist_append() failed for value: '%s'\n"), string);
return NULL;
}
return list;
}
#define CURL_SETOPT(curl, opt, val) \
if (curl_easy_setopt(curl, opt, val) != CURLE_OK) { \
fprintf(stderr, _("curl_easy_setopt() failed\n")); \
rval = 17; \
goto cleanup; \
}
size_t
jsonrpc_handle_response(char *ptr, size_t size, size_t nmemb, void *userdata) {
size_t realsize = size * nmemb;
curl_buffer *cb = (curl_buffer *) userdata;
char *buf = (char *) realloc(cb->payload, cb->size + realsize + 1);
if (!buf) {
fprintf(stderr, _("Expanding buffer in jsonrpc_handle_response failed"));
free(cb->payload);
cb->payload = NULL;
return 0;
}
cb->payload = buf;
memcpy(&(cb->payload[cb->size]), ptr, realsize);
cb->size += realsize;
cb->payload[cb->size] = 0;
return realsize;
}
static int
jsonrpc_request(const char *ipaserver, const json_t *json, curl_buffer *response, bool quiet) {
int rval = 0;
CURL *curl = NULL;
char *url = NULL;
char *referer = NULL;
char *user_agent = NULL;
struct curl_slist *headers = NULL;
char *json_str = NULL;
if (curl_global_init(CURL_GLOBAL_DEFAULT) != CURLE_OK) {
fprintf(stderr, _("curl_global_init() failed\n"));
rval = 17;
goto cleanup;
}
curl = curl_easy_init();
if (!curl) {
fprintf(stderr, _("curl_easy_init() failed\n"));
rval = 17;
goto cleanup;
}
/* setting endpoint and custom headers */
ASPRINTF(&url, "https://%s/ipa/json", ipaserver);
CURL_SETOPT(curl, CURLOPT_URL, url);
ASPRINTF(&referer, "referer: https://%s/ipa", ipaserver);
headers = curl_slist_append_log(headers, referer, quiet);
if (!headers) {
rval = 17;
goto cleanup;
}
ASPRINTF(&user_agent, "User-Agent: %s/%s", NAME, VERSION);
headers = curl_slist_append_log(headers, user_agent, quiet);
if (!headers) {
rval = 17;
goto cleanup;
}
headers = curl_slist_append_log(headers, "Accept: application/json", quiet);
if (!headers) {
rval = 17;
goto cleanup;
}
headers = curl_slist_append_log(headers, "Content-Type: application/json", quiet);
if (!headers) {
rval = 17;
goto cleanup;
}
CURL_SETOPT(curl, CURLOPT_HTTPHEADER, headers);
CURL_SETOPT(curl, CURLOPT_CAINFO, DEFAULT_CA_CERT_FILE);
CURL_SETOPT(curl, CURLOPT_WRITEFUNCTION, &jsonrpc_handle_response);
CURL_SETOPT(curl, CURLOPT_WRITEDATA, response);
CURL_SETOPT(curl, CURLOPT_HTTPAUTH, CURLAUTH_NEGOTIATE);
CURL_SETOPT(curl, CURLOPT_USERPWD, ":");
if (debug)
CURL_SETOPT(curl, CURLOPT_VERBOSE, 1L);
json_str = json_dumps(json, 0);
if (!json_str) {
fprintf(stderr, _("json_dumps() failed\n"));
rval = 17;
goto cleanup;
}
CURL_SETOPT(curl, CURLOPT_POSTFIELDS, json_str);
if (debug)
fprintf(stderr, _("JSON-RPC request:\n%s\n"), json_str);
/* Perform the call and check for errors */
CURLcode res = curl_easy_perform(curl);
if (res != CURLE_OK)
{
fprintf(stderr, _("JSON-RPC call failed: %s\n"), curl_easy_strerror(res));
rval = 17;
goto cleanup;
}
long resp_code;
curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &resp_code);
if (resp_code != 200) {
if (resp_code == 401)
fprintf(stderr, _("JSON-RPC call was unauthorized. Check your credentials.\n"));
else
fprintf(stderr, _("JSON-RPC call failed with status code: %li\n"), resp_code);
rval = 17;
goto cleanup;
}
if (debug && response->payload) {
fprintf(stderr, _("JSON-RPC response:\n%s\n"), response->payload);
}
cleanup:
curl_slist_free_all(headers);
if (curl)
curl_easy_cleanup(curl);
curl_global_cleanup();
if (url)
free(url);
if (referer)
free(referer);
if (user_agent)
free(user_agent);
if (json_str)
free(json_str);
return rval;
}
static int
jsonrpc_parse_error(json_t *j_error_obj) {
int rval = 0;
json_error_t j_error;
int error_code = 0;
char *error_message = NULL;
if (json_unpack_ex(j_error_obj, &j_error, 0, "{s:i, s:s}",
"code", &error_code,
"message", &error_message) != 0) {
if (debug)
fprintf(stderr, _("Extracting the error from the JSON-RPC response failed: %s\n"), j_error.text);
rval = 17;
goto cleanup;
}
switch (error_code) {
case 2100:
fprintf(stderr, _("No permission to join this host to the IPA domain.\n"));
rval = 1;
break;
default:
if (error_message)
fprintf(stderr, "%s\n", error_message);
rval = 1;
break;
}
cleanup:
return rval;
}
static int
jsonrpc_parse_response(const char *payload, json_t** j_result_obj, bool quiet) {
int rval = 0;
json_error_t j_error;
json_t *j_root = NULL;
json_t *j_error_obj = NULL;
j_root = json_loads(payload, 0, &j_error);
if (!j_root) {
fprintf(stderr, _("Parsing JSON-RPC response failed: %s\n"), j_error.text);
rval = 17;
goto cleanup;
}
j_error_obj = json_object_get(j_root, "error");
if (j_error_obj && !json_is_null(j_error_obj))
{
rval = jsonrpc_parse_error(j_error_obj);
goto cleanup;
}
*j_result_obj = json_object_get(j_root, "result");
if (!*j_result_obj) {
fprintf(stderr, _("Parsing JSON-RPC response failed: no 'result' value found.\n"));
rval = 17;
goto cleanup;
}
json_incref(*j_result_obj);
cleanup:
json_decref(j_root);
return rval;
}
static int
jsonrpc_parse_join_response(const char *payload, join_info *join_i, bool quiet) {
int rval = 0;
json_error_t j_error;
json_t *j_result_obj = NULL;
rval = jsonrpc_parse_response(payload, &j_result_obj, quiet);
if (rval)
goto cleanup;
char *tmp_hostdn = NULL;
char *tmp_princ = NULL;
char *tmp_pwdch = NULL;
if (json_unpack_ex(j_result_obj, &j_error, 0, "[s, {s:[s], s?:[s]}]",
&tmp_hostdn,
"krbprincipalname", &tmp_princ,
"krblastpwdchange", &tmp_pwdch) != 0) {
fprintf(stderr, _("Extracting the data from the JSON-RPC response failed: %s\n"), j_error.text);
rval = 17;
goto cleanup;
}
ASPRINTF(&join_i->dn, "%s", tmp_hostdn);
ASPRINTF(&join_i->krb_principal, "%s", tmp_princ);
join_i->is_provisioned = tmp_pwdch != NULL;
cleanup:
json_decref(j_result_obj);
return rval;
}
static int
join_krb5_jsonrpc(const char *ipaserver, const char *hostname, char **hostdn, const char **princ, bool force, bool quiet) {
int rval = 0;
struct utsname uinfo;
curl_buffer cb = {0};
json_error_t j_error;
json_t *json_req = NULL;
join_info join_i = {0};
*hostdn = NULL;
*princ = NULL;
uname(&uinfo);
/* create the JSON-RPC payload */
json_req = json_pack_ex(&j_error, 0, "{s:s, s:[[s], {s:s, s:s}]}",
"method", "join",
"params",
hostname,
"nsosversion", uinfo.release,
"nshardwareplatform", uinfo.machine);
if (!json_req) {
fprintf(stderr, _("json_pack_ex() failed: %s\n"), j_error.text);
rval = 17;
goto cleanup;
}
rval = jsonrpc_request(ipaserver, json_req, &cb, quiet);
if (rval != 0)
goto cleanup;
rval = jsonrpc_parse_join_response(cb.payload, &join_i, quiet);
if (rval != 0)
goto cleanup;
*hostdn = join_i.dn;
*princ = join_i.krb_principal;
if (!force && join_i.is_provisioned) {
fprintf(stderr, _("Host is already joined.\n"));
rval = 13;
goto cleanup;
}
cleanup:
json_decref(json_req);
if (cb.payload)
free(cb.payload);
return rval;
}
static int
jsonrpc_parse_unenroll_response(const char *payload, bool* result, bool quiet) {
int rval = 0;
json_error_t j_error;
json_t *j_result_obj = NULL;
rval = jsonrpc_parse_response(payload, &j_result_obj, quiet);
if (rval)
goto cleanup;
if (json_unpack_ex(j_result_obj, &j_error, 0, "{s:b}",
"result", result) != 0) {
fprintf(stderr, _("Extracting the data from the JSON-RPC response failed: %s\n"), j_error.text);
rval = 20;
goto cleanup;
}
cleanup:
json_decref(j_result_obj);
return rval;
}
static int
jsonrpc_unenroll_host(const char *ipaserver, const char *host, bool quiet) {
int rval = 0;
curl_buffer cb = {0};
json_error_t j_error;
json_t *json_req = NULL;
bool result = false;
/* create the JSON-RPC payload */
json_req = json_pack_ex(&j_error, 0, "{s:s, s:[[s], {}]}",
"method", "host_disable",
"params",
host);
if (!json_req) {
fprintf(stderr, _("json_pack_ex() failed: %s\n"), j_error.text);
rval = 17;
goto cleanup;
}
rval = jsonrpc_request(ipaserver, json_req, &cb, quiet);
if (rval != 0)
goto cleanup;
rval = jsonrpc_parse_unenroll_response(cb.payload, &result, quiet);
if (rval != 0)
goto cleanup;
if (result == true) {
if (!quiet)
fprintf(stderr, _("Unenrollment successful.\n"));
} else {
fprintf(stderr, _("Unenrollment failed.\n"));
}
cleanup:
json_decref(json_req);
if (cb.payload)
free(cb.payload);
return rval;
}
#endif
#ifdef WITH_IPA_JOIN_XML
static int
xmlrpc_unenroll_host(const char *ipaserver, const char *host, bool quiet)
{
int rval = 0;
int ret;
xmlrpc_env env;
xmlrpc_value * argArrayP = NULL;
xmlrpc_value * paramArrayP = NULL;
xmlrpc_value * paramP = NULL;
xmlrpc_value * resultP = NULL;
xmlrpc_server_info * serverInfoP = NULL;
xmlrpc_value *princP = NULL;
char * url = NULL;
char * user_agent = NULL;
/* Start up our XML-RPC client library. */
xmlrpc_client_init(XMLRPC_CLIENT_NO_FLAGS, NAME, VERSION);
xmlrpc_env_init(&env);
xmlrpc_client_setup_global_const(&env);
#if 1
ret = asprintf(&url, "https://%s:443/ipa/xml", ipaserver);
#else
ret = asprintf(&url, "http://%s:8888/", ipaserver);
#endif
if (ret == -1)
{
fprintf(stderr, _("Out of memory!\n"));
rval = 3;
goto cleanup;
}
serverInfoP = xmlrpc_server_info_new(&env, url);
argArrayP = xmlrpc_array_new(&env);
paramArrayP = xmlrpc_array_new(&env);
paramP = xmlrpc_string_new(&env, host);
xmlrpc_array_append_item(&env, argArrayP, paramP);
xmlrpc_array_append_item(&env, paramArrayP, argArrayP);
xmlrpc_DECREF(paramP);
if ((user_agent = set_user_agent(ipaserver)) == NULL) {
rval = 3;
goto cleanup;
}
callRPC(user_agent, &env, serverInfoP, "host_disable", paramArrayP, &resultP);
if (handle_fault(&env)) {
rval = 17;
goto cleanup;
}
xmlrpc_struct_find_value(&env, resultP, "result", &princP);
if (princP) {
xmlrpc_bool result;
xmlrpc_read_bool(&env, princP, &result);
if (result == 1) {
if (!quiet)
fprintf(stderr, _("Unenrollment successful.\n"));
} else {
fprintf(stderr, _("Unenrollment failed.\n"));
}
xmlrpc_DECREF(princP);
} else {
fprintf(stderr, _("result not found in XML-RPC response\n"));
rval = 20;
goto cleanup;
}
cleanup:
free(user_agent);
free(url);
if (argArrayP)
xmlrpc_DECREF(argArrayP);
if (paramArrayP)
xmlrpc_DECREF(paramArrayP);
xmlrpc_env_clean(&env);
xmlrpc_client_cleanup();
return rval;
}
#endif
static int
join(const char *server, const char *hostname, const char *bindpw, const char *basedn, const char *keytab, bool force, bool quiet)
{
int rval = 0;
pid_t childpid = 0;
int status = 0;
char *ipaserver = NULL;
char *iparealm = NULL;
const char * princ = NULL;
char * hostdn = NULL;
krb5_context krbctx = NULL;
krb5_ccache ccache = NULL;
krb5_principal uprinc = NULL;
krb5_error_code krberr;
if (server) {
ipaserver = strdup(server);
} else {
char * conf_data = read_config_file(IPA_CONFIG);
if ((ipaserver = getIPAserver(conf_data)) == NULL) {
fprintf(stderr, _("Unable to determine IPA server from %s\n"),
IPA_CONFIG);
exit(1);
}
free(conf_data);
}
if (bindpw)
rval = join_ldap(ipaserver, hostname, &hostdn, bindpw, basedn, &princ, quiet);
else {
krberr = krb5_init_context(&krbctx);
if (krberr) {
fprintf(stderr, _("Unable to join host: "
"Kerberos context initialization failed\n"));
rval = 1;
goto cleanup;
}
krberr = krb5_cc_default(krbctx, &ccache);
if (krberr) {
fprintf(stderr, _("Unable to join host:"
" Kerberos Credential Cache not found\n"));
rval = 5;
goto cleanup;
}
krberr = krb5_cc_get_principal(krbctx, ccache, &uprinc);
if (krberr) {
fprintf(stderr, _("Unable to join host: Kerberos User Principal "
"not found and host password not provided.\n"));
rval = 6;
goto cleanup;
}
#ifdef WITH_IPA_JOIN_XML
rval = join_krb5_xmlrpc(ipaserver, hostname, &hostdn, &princ, force, quiet);
#else
rval = join_krb5_jsonrpc(ipaserver, hostname, &hostdn, &princ, force, quiet);
#endif
}
if (rval) goto cleanup;
/* Fork off and let ipa-getkeytab generate the keytab for us */
childpid = fork();
if (childpid < 0) {
fprintf(stderr, _("fork() failed\n"));
rval = 1;
goto cleanup;
}
if (childpid == 0) {
char *argv[12];
char *path = "/usr/sbin/ipa-getkeytab";
int arg = 0;
int err;
argv[arg++] = path;
argv[arg++] = "-s";
argv[arg++] = ipaserver;
argv[arg++] = "-p";
argv[arg++] = (char *)princ;
argv[arg++] = "-k";
argv[arg++] = (char *)keytab;
if (bindpw) {
argv[arg++] = "-D";
argv[arg++] = (char *)hostdn;
argv[arg++] = "-w";
argv[arg++] = (char *)bindpw;
}
if (quiet) {
argv[arg++] = "-q";
}
argv[arg++] = NULL;
err = execv(path, argv);
if (err == -1) {
switch(errno) {
case ENOENT:
fprintf(stderr, _("ipa-getkeytab not found\n"));
break;
case EACCES:
fprintf(stderr, _("ipa-getkeytab has bad permissions?\n"));
break;
default:
fprintf(stderr, _("executing ipa-getkeytab failed, "
"errno %d\n"), errno);
break;
}
}
} else {
wait(&status);
}
if WIFEXITED(status) {
rval = WEXITSTATUS(status);
if (rval != 0) {
fprintf(stderr, _("child exited with %d\n"), rval);
}
}
cleanup:
free((char *)princ);
if (bindpw)
ldap_memfree((void *)hostdn);
else
free((char *)hostdn);
free((char *)ipaserver);
free((char *)iparealm);
if (uprinc) krb5_free_principal(krbctx, uprinc);
if (ccache) krb5_cc_close(krbctx, ccache);
if (krbctx) krb5_free_context(krbctx);
return rval;
}
static int
unenroll_host(const char *server, const char *hostname, const char *ktname, bool quiet)
{
int rval = 0;
char *ipaserver = NULL;
char *principal = NULL;
char *realm = NULL;
krb5_context krbctx = NULL;
krb5_keytab keytab = NULL;
krb5_ccache ccache = NULL;
krb5_principal princ = NULL;
krb5_error_code krberr;
krb5_creds creds;
krb5_get_init_creds_opt gicopts;
char tgs[LINE_MAX];
memset(&creds, 0, sizeof(creds));
if (server) {
ipaserver = strdup(server);
} else {
char * conf_data = read_config_file(IPA_CONFIG);
if ((ipaserver = getIPAserver(conf_data)) == NULL) {
fprintf(stderr, _("Unable to determine IPA server from %s\n"),
IPA_CONFIG);
exit(1);
}
free(conf_data);
}
krberr = krb5_init_context(&krbctx);
if (krberr) {
fprintf(stderr, _("Unable to join host: "
"Kerberos context initialization failed\n"));
rval = 1;
goto cleanup;
}
krberr = krb5_kt_resolve(krbctx, ktname, &keytab);
if (krberr != 0) {
fprintf(stderr, _("Error resolving keytab: %s.\n"),
error_message(krberr));
rval = 7;
goto cleanup;
}
krberr = krb5_get_default_realm(krbctx, &realm);
if (krberr != 0) {
fprintf(stderr, _("Error getting default Kerberos realm: %s.\n"),
error_message(krberr));
rval = 21;
goto cleanup;
}
ASPRINTF(&principal, "host/%s@%s", hostname, realm);
krberr = krb5_parse_name(krbctx, principal, &princ);
if (krberr != 0) {
fprintf(stderr, _("Error parsing \"%1$s\": %2$s.\n"),
principal, error_message(krberr));
rval = 4;
goto cleanup;
}
strcpy(tgs, KRB5_TGS_NAME);
snprintf(tgs + strlen(tgs), sizeof(tgs) - strlen(tgs), "/%.*s",
(krb5_princ_realm(krbctx, princ))->length,
(krb5_princ_realm(krbctx, princ))->data);
snprintf(tgs + strlen(tgs), sizeof(tgs) - strlen(tgs), "@%.*s",
(krb5_princ_realm(krbctx, princ))->length,
(krb5_princ_realm(krbctx, princ))->data);
krb5_get_init_creds_opt_init(&gicopts);
krb5_get_init_creds_opt_set_forwardable(&gicopts, 1);
krberr = krb5_get_init_creds_keytab(krbctx, &creds, princ, keytab,
0, tgs, &gicopts);
if (krberr != 0) {
fprintf(stderr, _("Error obtaining initial credentials: %s.\n"),
error_message(krberr));
rval = 19;
goto cleanup;
}
krberr = krb5_cc_resolve(krbctx, "MEMORY:ipa-join", &ccache);
if (krberr == 0) {
krberr = krb5_cc_initialize(krbctx, ccache, creds.client);
} else {
fprintf(stderr,
_("Unable to generate Kerberos Credential Cache\n"));
rval = 19;
goto cleanup;
}
if (krberr != 0) {
fprintf(stderr,
_("Unable to generate Kerberos Credential Cache\n"));
rval = 19;
goto cleanup;
}
krberr = krb5_cc_store_cred(krbctx, ccache, &creds);
if (krberr != 0) {
fprintf(stderr,
_("Error storing creds in credential cache: %s.\n"),
error_message(krberr));
rval = 19;
goto cleanup;
}
krb5_cc_close(krbctx, ccache);
ccache = NULL;
putenv("KRB5CCNAME=MEMORY:ipa-join");
#ifdef WITH_IPA_JOIN_XML
rval = xmlrpc_unenroll_host(ipaserver, hostname, quiet);
#else
rval = jsonrpc_unenroll_host(ipaserver, hostname, quiet);
#endif
cleanup:
if (principal)
free(principal);
if (ipaserver)
free(ipaserver);
if (realm)
krb5_free_default_realm(krbctx, realm);
if (keytab)
krb5_kt_close(krbctx, keytab);
if (princ)
krb5_free_principal(krbctx, princ);
if (ccache)
krb5_cc_close(krbctx, ccache);
krb5_free_cred_contents(krbctx, &creds);
if (krbctx)
krb5_free_context(krbctx);
return rval;
}
/*
* Note, an intention with return values is so that this is compatible with
* ipa-getkeytab. This is so based on the return value you can distinguish
* between errors common between the two (no kerbeors ccache) and those
* unique (host already added).
*/
int
main(int argc, const char **argv) {
static const char *hostname = NULL;
static const char *server = NULL;
static const char *keytab = NULL;
static const char *bindpw = NULL;
static const char *basedn = NULL;
int quiet = 0;
int unenroll = 0;
int force = 0;
struct poptOption options[] = {
{ "debug", 'd', POPT_ARG_NONE, &debug, 0,
_("Print the raw XML-RPC output in GSSAPI mode"), NULL },
{ "quiet", 'q', POPT_ARG_NONE, &quiet, 0,
_("Quiet mode. Only errors are displayed."), NULL },
{ "unenroll", 'u', POPT_ARG_NONE, &unenroll, 0,
_("Unenroll this host from IPA server"), NULL },
{ "hostname", 'h', POPT_ARG_STRING, &hostname, 0,
_("Hostname of this server"), _("hostname") },
{ "server", 's', POPT_ARG_STRING, &server, 0,
_("IPA Server to use"), _("hostname") },
{ "keytab", 'k', POPT_ARG_STRING, &keytab, 0,
_("Specifies where to store keytab information."), _("filename") },
{ "force", 'f', POPT_ARG_NONE, &force, 0,
_("Force the host join. Rejoin even if already joined."), NULL },
{ "bindpw", 'w', POPT_ARG_STRING, &bindpw, 0,
_("LDAP password (if not using Kerberos)"), _("password") },
{ "basedn", 'b', POPT_ARG_STRING, &basedn, 0,
_("LDAP basedn"), _("basedn") },
POPT_AUTOHELP
POPT_TABLEEND
};
poptContext pc;
int ret;
ret = init_gettext();
if (ret) {
fprintf(stderr, "Failed to load translations\n");
}
pc = poptGetContext("ipa-join", argc, (const char **)argv, options, 0);
ret = poptGetNextOpt(pc);
if (ret != -1) {
if (!quiet) {
poptPrintUsage(pc, stderr, 0);
}
poptFreeContext(pc);
exit(2);
}
poptFreeContext(pc);
if (debug)
setenv("XMLRPC_TRACE_XML", "1", 1);
if (!keytab)
keytab = "/etc/krb5.keytab";
/* auto-detect and verify hostname */
if (!hostname) {
hostname = ipa_gethostfqdn();
if (hostname == NULL) {
fprintf(stderr, _("Cannot get host's FQDN!\n"));
exit(22);
}
}
if (NULL == strstr(hostname, ".")) {
fprintf(stderr, _("The hostname must be fully-qualified: %s\n"), hostname);
exit(16);
}
if ((strcmp(hostname, "localhost") == 0) || (strcmp(hostname, "localhost.localdomain") == 0)){
fprintf(stderr, _("The hostname must not be: %s\n"), hostname);
exit(16);
}
if (unenroll) {
ret = unenroll_host(server, hostname, keytab, quiet);
} else {
ret = check_perms(keytab);
if (ret == 0)
ret = join(server, hostname, bindpw, basedn, keytab, force, quiet);
}
exit(ret);
}
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