ns_connect.c revision 47789246278f5a31cca77e9dff187c916ada68ac
2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License, Version 1.0 only
2N/A * (the "License"). You may not use this file except in compliance
2N/A * with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A/*
2N/A * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
2N/A * Use is subject to license terms.
2N/A */
2N/A
2N/A#pragma ident "%Z%%M% %I% %E% SMI"
2N/A
2N/A#include <stdlib.h>
2N/A#include <stdio.h>
2N/A#include <errno.h>
2N/A#include <string.h>
2N/A#include <synch.h>
2N/A#include <time.h>
2N/A#include <libintl.h>
2N/A#include <thread.h>
2N/A#include <syslog.h>
2N/A#include <sys/mman.h>
2N/A#include <nsswitch.h>
2N/A#include <nss_dbdefs.h>
2N/A#include "solaris-priv.h"
2N/A#include "ns_sldap.h"
2N/A#include "ns_internal.h"
2N/A#include "ns_cache_door.h"
2N/A#include <sys/stat.h>
2N/A#include <fcntl.h>
2N/A#include <procfs.h>
2N/A#include <unistd.h>
2N/A
2N/Aextern unsigned int _sleep(unsigned int);
2N/Aextern int ldap_sasl_cram_md5_bind_s(LDAP *, char *, struct berval *,
2N/A LDAPControl **, LDAPControl **);
2N/Aextern int ldapssl_install_gethostbyaddr(LDAP *ld, const char *skip);
2N/A
2N/Astatic int openConnection(LDAP **, const char *, const ns_cred_t *,
2N/A int, ns_ldap_error_t **, int, int);
2N/A
2N/Astatic mutex_t sessionPoolLock = DEFAULTMUTEX;
2N/A
2N/Astatic Connection **sessionPool = NULL;
2N/Astatic int sessionPoolSize = 0;
2N/A
2N/A
2N/Astatic mutex_t nscdLock = DEFAULTMUTEX;
2N/Astatic int nscdChecked = 0;
2N/Astatic pid_t checkedPid = -1;
2N/Astatic int isNscd = 0;
2N/A
2N/A
2N/A/*
2N/A * Check /proc/PID/psinfo to see if this process is nscd
2N/A * If it is, treat connection as NS_LDAP_KEEP_CONN, to reduce
2N/A * constant reconnects for many operations.
2N/A * A more complete solution is to develop true connection pooling.
2N/A * However, this is much better than a new connection for every request.
2N/A */
2N/Astatic int
2N/Anscd_proc()
2N/A{
2N/A pid_t my_pid;
2N/A psinfo_t pinfo;
2N/A char fname[BUFSIZ];
2N/A int ret;
2N/A int fd;
2N/A
2N/A /* Don't bother checking if this process isn't root. */
2N/A /* It can't be nscd */
2N/A if (getuid() != 0)
2N/A return (0);
2N/A
2N/A my_pid = getpid();
2N/A if (nscdChecked && (my_pid == checkedPid)) {
2N/A return (isNscd);
2N/A }
2N/A (void) mutex_lock(&nscdLock);
2N/A if (nscdChecked && (my_pid == checkedPid)) {
2N/A (void) mutex_unlock(&nscdLock);
2N/A return (isNscd);
2N/A }
2N/A nscdChecked = 1;
2N/A checkedPid = my_pid;
2N/A isNscd = 0;
2N/A if (snprintf(fname, BUFSIZ, "/proc/%d/psinfo", my_pid) != 0) {
2N/A if ((fd = open(fname, O_RDONLY)) > 0) {
2N/A ret = read(fd, &pinfo, sizeof (psinfo_t));
2N/A (void) close(fd);
2N/A if (ret == sizeof (psinfo_t) &&
2N/A (strcmp(pinfo.pr_fname, "nscd") == 0)) {
2N/A /* process runs as root and is named nscd */
2N/A /* that's good enough for now */
2N/A isNscd = 1;
2N/A }
2N/A }
2N/A }
2N/A (void) mutex_unlock(&nscdLock);
2N/A return (isNscd);
2N/A}
2N/A
2N/A/*
2N/A * This function requests a server from the cache manager through
2N/A * the door functionality
2N/A */
2N/A
2N/Astatic int
2N/A__s_api_requestServer(const char *request, const char *server,
2N/A ns_server_info_t *ret, ns_ldap_error_t **error)
2N/A{
2N/A union {
2N/A ldap_data_t s_d;
2N/A char s_b[DOORBUFFERSIZE];
2N/A } space;
2N/A ldap_data_t *sptr;
2N/A int ndata;
2N/A int adata;
2N/A char errstr[MAXERROR];
2N/A const char *ireq;
2N/A char *rbuf, *ptr, *rest;
2N/A char *dptr;
2N/A char **mptr, **mptr1, **cptr, **cptr1;
2N/A int mcnt, ccnt;
2N/A char **servers;
2N/A int rc;
2N/A
2N/A if (ret == NULL || error == NULL) {
2N/A return (NS_LDAP_OP_FAILED);
2N/A }
2N/A (void) memset(ret, 0, sizeof (ns_server_info_t));
2N/A *error = NULL;
2N/A
2N/A (void) memset(space.s_b, 0, DOORBUFFERSIZE);
2N/A
2N/A if (request == NULL)
2N/A ireq = NS_CACHE_NEW;
2N/A else
2N/A ireq = request;
2N/A
2N/A adata = (sizeof (ldap_call_t) + strlen(ireq) +1);
2N/A if (server != NULL) {
2N/A adata += strlen(DOORLINESEP) + 1;
2N/A adata += strlen(server) + 1;
2N/A }
2N/A ndata = sizeof (space);
2N/A space.s_d.ldap_call.ldap_callnumber = GETLDAPSERVER;
2N/A (void) strcpy(space.s_d.ldap_call.ldap_u.domainname, ireq);
2N/A if (server != NULL) {
2N/A (void) strcat(space.s_d.ldap_call.ldap_u.domainname,
2N/A DOORLINESEP);
2N/A (void) strcat(space.s_d.ldap_call.ldap_u.domainname, server);
2N/A }
2N/A sptr = &space.s_d;
2N/A
2N/A switch (__ns_ldap_trydoorcall(&sptr, &ndata, &adata)) {
2N/A case SUCCESS:
2N/A break;
2N/A /* this case is for when the $mgr is not running, but ldapclient */
2N/A /* is trying to initialize things */
2N/A case NOSERVER:
2N/A /* get first server from config list unavailable otherwise */
2N/A servers = NULL;
2N/A rc = __s_api_getServers(&servers, error);
2N/A if (rc != NS_LDAP_SUCCESS) {
2N/A if (servers != NULL) {
2N/A __s_api_free2dArray(servers);
2N/A servers = NULL;
2N/A }
2N/A return (rc);
2N/A }
2N/A if (servers == NULL || servers[0] == NULL) {
2N/A __s_api_free2dArray(servers);
2N/A servers = NULL;
2N/A (void) sprintf(errstr,
2N/A gettext("No server found in configuration"));
2N/A MKERROR(LOG_ERR, *error, NS_CONFIG_NODEFAULT,
2N/A strdup(errstr), NULL);
2N/A return (NS_LDAP_CONFIG);
2N/A }
2N/A ret->server = strdup(servers[0]);
2N/A if (ret->server == NULL) {
2N/A __s_api_free2dArray(servers);
2N/A return (NS_LDAP_MEMORY);
2N/A }
2N/A ret->saslMechanisms = NULL;
2N/A ret->controls = NULL;
2N/A __s_api_free2dArray(servers);
2N/A servers = NULL;
2N/A return (NS_LDAP_SUCCESS);
2N/A case NOTFOUND:
2N/A default:
2N/A return (NS_LDAP_OP_FAILED);
2N/A }
2N/A
2N/A /* copy info from door call return structure here */
2N/A rbuf = space.s_d.ldap_ret.ldap_u.config;
2N/A
2N/A /* Get the host */
2N/A ptr = strtok_r(rbuf, DOORLINESEP, &rest);
2N/A if (ptr == NULL) {
2N/A (void) sprintf(errstr, gettext("No server returned from "
2N/A "ldap_cachemgr"));
2N/A MKERROR(LOG_WARNING, *error, NS_CONFIG_CACHEMGR,
2N/A strdup(errstr), NULL);
2N/A return (NS_LDAP_OP_FAILED);
2N/A }
2N/A ret->server = strdup(ptr);
2N/A if (ret->server == NULL) {
2N/A return (NS_LDAP_MEMORY);
2N/A }
2N/A
2N/A /* get the Supported Controls/SASL mechs */
2N/A mptr = NULL;
2N/A mcnt = 0;
2N/A cptr = NULL;
2N/A ccnt = 0;
2N/A for (; ; ) {
2N/A ptr = strtok_r(NULL, DOORLINESEP, &rest);
2N/A if (ptr == NULL)
2N/A break;
2N/A if (strncasecmp(ptr, _SASLMECHANISM,
2N/A _SASLMECHANISM_LEN) == 0) {
2N/A dptr = strchr(ptr, '=');
2N/A if (dptr == NULL)
2N/A continue;
2N/A dptr++;
2N/A mptr1 = (char **)realloc((void *)mptr,
2N/A sizeof (char *) * (mcnt+2));
2N/A if (mptr1 == NULL) {
2N/A __s_api_free2dArray(mptr);
2N/A if (sptr != &space.s_d) {
2N/A (void) munmap((char *)sptr, ndata);
2N/A }
2N/A __s_api_free2dArray(cptr);
2N/A free(ret->server);
2N/A ret->server = NULL;
2N/A return (NS_LDAP_MEMORY);
2N/A }
2N/A mptr = mptr1;
2N/A mptr[mcnt] = strdup(dptr);
2N/A if (mptr[mcnt] == NULL) {
2N/A if (sptr != &space.s_d) {
2N/A (void) munmap((char *)sptr, ndata);
2N/A }
2N/A __s_api_free2dArray(cptr);
2N/A cptr = NULL;
2N/A __s_api_free2dArray(mptr);
2N/A mptr = NULL;
2N/A free(ret->server);
2N/A ret->server = NULL;
2N/A return (NS_LDAP_MEMORY);
2N/A }
2N/A mcnt++;
2N/A mptr[mcnt] = NULL;
2N/A }
2N/A if (strncasecmp(ptr, _SUPPORTEDCONTROL,
2N/A _SUPPORTEDCONTROL_LEN) == 0) {
2N/A dptr = strchr(ptr, '=');
2N/A if (dptr == NULL)
2N/A continue;
2N/A dptr++;
2N/A cptr1 = (char **)realloc((void *)cptr,
2N/A sizeof (char *) * (ccnt+2));
2N/A if (cptr1 == NULL) {
2N/A if (sptr != &space.s_d) {
2N/A (void) munmap((char *)sptr, ndata);
2N/A }
2N/A __s_api_free2dArray(cptr);
2N/A __s_api_free2dArray(mptr);
2N/A mptr = NULL;
2N/A free(ret->server);
2N/A ret->server = NULL;
2N/A return (NS_LDAP_MEMORY);
2N/A }
2N/A cptr = cptr1;
2N/A cptr[ccnt] = strdup(dptr);
2N/A if (cptr[ccnt] == NULL) {
2N/A if (sptr != &space.s_d) {
2N/A (void) munmap((char *)sptr, ndata);
2N/A }
2N/A __s_api_free2dArray(cptr);
2N/A cptr = NULL;
2N/A __s_api_free2dArray(mptr);
2N/A mptr = NULL;
2N/A free(ret->server);
2N/A ret->server = NULL;
2N/A return (NS_LDAP_MEMORY);
2N/A }
2N/A ccnt++;
2N/A cptr[ccnt] = NULL;
2N/A }
2N/A }
2N/A if (mptr != NULL) {
2N/A ret->saslMechanisms = mptr;
2N/A }
2N/A if (cptr != NULL) {
2N/A ret->controls = cptr;
2N/A }
2N/A
2N/A
/* clean up door call */
if (sptr != &space.s_d) {
(void) munmap((char *)sptr, ndata);
}
*error = NULL;
return (NS_LDAP_SUCCESS);
}
#ifdef DEBUG
/*
* printCred(): prints the credential structure
*/
static void
printCred(FILE *fp, const ns_cred_t *cred)
{
if (fp == NULL) {
(void) fprintf(fp, "printCred: fp is NULL\n");
return;
}
if (cred == NULL) {
(void) fprintf(fp, "printCred: cred is NULL\n");
return;
}
(void) fprintf(fp, "AuthType=%d\n", cred->auth.type);
(void) fprintf(fp, "TlsType=%d\n", cred->auth.tlstype);
(void) fprintf(fp, "SaslMech=%d\n", cred->auth.saslmech);
(void) fprintf(fp, "SaslOpt=%d\n", cred->auth.saslopt);
if (cred->hostcertpath)
(void) fprintf(fp, "hostCertPath=%s\n", cred->hostcertpath);
if (cred->cred.unix_cred.userID)
(void) fprintf(fp, "userID=%s\n", cred->cred.unix_cred.userID);
if (cred->cred.unix_cred.passwd)
(void) fprintf(fp, "passwd=%s\n", cred->cred.unix_cred.passwd);
}
/*
* printConnection(): prints the connection structure
*/
static void
printConnection(FILE *fp, Connection *con)
{
if (fp == NULL || con == NULL)
return;
(void) fprintf(fp, "connectionID=%d\n", con->connectionId);
(void) fprintf(fp, "usedBit=%d\n", con->usedBit);
(void) fprintf(fp, "threadID=%d\n", con->threadID);
if (con->serverAddr) {
(void) fprintf(fp, "serverAddr=%s\n", con->serverAddr);
}
printCred(fp, con->auth);
(void) fprintf(fp, "-----------------------------------------------\n");
fflush(fp);
}
#endif /* DEBUG */
/*
* addConnection(): inserts a connection in the connection list.
* It will also sets use bit and the thread Id for the thread
* using the connection for the first time.
* Returns: -1 = failure, new Connection ID = success
*/
static int
addConnection(Connection *con)
{
int i;
if (!con)
return (-1);
#ifdef DEBUG
(void) fprintf(stderr, "Adding connection thrid=%d\n", con->threadID);
#endif /* DEBUG */
(void) mutex_lock(&sessionPoolLock);
if (sessionPool == NULL) {
sessionPoolSize = SESSION_CACHE_INC;
sessionPool = calloc(sessionPoolSize,
sizeof (struct connection **));
if (!sessionPool) {
(void) mutex_unlock(&sessionPoolLock);
return (-1);
}
#ifdef DEBUG
(void) fprintf(stderr, "Initialized sessionPool\n");
#endif /* DEBUG */
}
for (i = 0; (i < sessionPoolSize) && (sessionPool[i] != NULL); ++i)
;
if (i == sessionPoolSize) {
/* run out of array, need to increase sessionPool */
Connection **cl;
cl = (Connection **) realloc(sessionPool,
(sessionPoolSize + SESSION_CACHE_INC) *
sizeof (Connection *));
if (!cl) {
(void) mutex_unlock(&sessionPoolLock);
return (-1);
}
(void) memset(cl + sessionPoolSize, 0,
SESSION_CACHE_INC * sizeof (struct connection *));
sessionPool = cl;
sessionPoolSize += SESSION_CACHE_INC;
#ifdef DEBUG
(void) fprintf(stderr, "Increased sessionPoolSize to: %d\n",
sessionPoolSize);
#endif /* DEBUG */
}
sessionPool[i] = con;
con->usedBit = B_TRUE;
(void) mutex_unlock(&sessionPoolLock);
con->connectionId = i + CONID_OFFSET;
#ifdef DEBUG
(void) fprintf(stderr, "Connection added [%d]\n", i);
printConnection(stderr, con);
#endif /* DEBUG */
return (i + CONID_OFFSET);
}
/*
* See if the specified session matches a currently available
*/
static int
findConnectionById(int flags, const ns_cred_t *auth, ConnectionID cID,
Connection **conp)
{
Connection *cp;
int id;
if ((conp == NULL) || (auth == NULL) || cID < CONID_OFFSET)
return (-1);
*conp = NULL;
if (sessionPool == NULL)
return (-1);
id = cID - CONID_OFFSET;
if (id < 0 || id >= sessionPoolSize)
return (-1);
(void) mutex_lock(&sessionPoolLock);
if (sessionPool[id] == NULL) {
(void) mutex_unlock(&sessionPoolLock);
return (-1);
}
cp = sessionPool[id];
/*
* Make sure the connection has the same type of authentication method
*/
if ((cp->usedBit) ||
(cp->auth->auth.type != auth->auth.type) ||
(cp->auth->auth.tlstype != auth->auth.tlstype) ||
(cp->auth->auth.saslmech != auth->auth.saslmech) ||
(cp->auth->auth.saslopt != auth->auth.saslopt)) {
(void) mutex_unlock(&sessionPoolLock);
return (-1);
}
if ((((cp->auth->auth.type == NS_LDAP_AUTH_SASL) &&
((cp->auth->auth.saslmech == NS_LDAP_SASL_CRAM_MD5) ||
(cp->auth->auth.saslmech == NS_LDAP_SASL_DIGEST_MD5))) ||
(cp->auth->auth.type == NS_LDAP_AUTH_SIMPLE)) &&
((cp->auth->cred.unix_cred.userID == NULL) ||
(strcasecmp(cp->auth->cred.unix_cred.userID,
auth->cred.unix_cred.userID) != 0))) {
(void) mutex_unlock(&sessionPoolLock);
return (-1);
}
/* An existing connection is found but it needs to be reset */
if (flags & NS_LDAP_NEW_CONN) {
(void) mutex_unlock(&sessionPoolLock);
DropConnection(cID, 0);
return (-1);
}
/* found an available connection */
cp->usedBit = B_TRUE;
(void) mutex_unlock(&sessionPoolLock);
cp->threadID = thr_self();
*conp = cp;
return (cID);
}
/*
* findConnection(): find an available connection from the list
* that matches the criteria specified in Connection structure.
* If serverAddr is NULL, then find a connection to any server
* as long as it matches the rest of the parameters.
* Returns: -1 = failure, the Connection ID found = success.
*/
static int
findConnection(const char *serverAddr, const ns_cred_t *auth, Connection **conp)
{
Connection *cp;
int i;
if (auth == NULL || conp == NULL)
return (-1);
*conp = NULL;
#ifdef DEBUG
(void) fprintf(stderr, "Find connection\n");
(void) fprintf(stderr, "Looking for ....\n");
if (serverAddr && *serverAddr)
(void) fprintf(stderr, "serverAddr=%s\n", serverAddr);
else
(void) fprintf(stderr, "serverAddr=NULL\n");
printCred(stderr, auth);
fflush(stderr);
#endif /* DEBUG */
if (sessionPool == NULL)
return (-1);
(void) mutex_lock(&sessionPoolLock);
for (i = 0; i < sessionPoolSize; ++i) {
if (sessionPool[i] == NULL)
continue;
cp = sessionPool[i];
#ifdef DEBUG
(void) fprintf(stderr, "checking connection [%d] ....\n", i);
printConnection(stderr, cp);
#endif /* DEBUG */
if ((cp->usedBit) ||
(cp->auth->auth.type != auth->auth.type) ||
(cp->auth->auth.tlstype != auth->auth.tlstype) ||
(cp->auth->auth.saslmech != auth->auth.saslmech) ||
(cp->auth->auth.saslopt != auth->auth.saslopt) ||
(serverAddr && *serverAddr &&
(strcasecmp(serverAddr, cp->serverAddr) != 0)))
continue;
if ((((cp->auth->auth.type == NS_LDAP_AUTH_SASL) &&
((cp->auth->auth.saslmech == NS_LDAP_SASL_CRAM_MD5) ||
(cp->auth->auth.saslmech == NS_LDAP_SASL_DIGEST_MD5))) ||
(cp->auth->auth.type == NS_LDAP_AUTH_SIMPLE)) &&
((cp->auth->cred.unix_cred.userID == NULL) ||
(cp->auth->cred.unix_cred.passwd == NULL) ||
((strcasecmp(cp->auth->cred.unix_cred.userID,
auth->cred.unix_cred.userID) != 0)) ||
((strcmp(cp->auth->cred.unix_cred.passwd,
auth->cred.unix_cred.passwd) != 0))))
continue;
/* found an available connection */
cp->usedBit = B_TRUE;
(void) mutex_unlock(&sessionPoolLock);
cp->threadID = thr_self();
*conp = cp;
#ifdef DEBUG
(void) fprintf(stderr, "Connection found cID=%d\n", i);
fflush(stderr);
#endif /* DEBUG */
return (i + CONID_OFFSET);
}
(void) mutex_unlock(&sessionPoolLock);
return (-1);
}
/*
* Free a Connection structure
*/
static void
freeConnection(Connection *con)
{
if (con == NULL)
return;
if (con->serverAddr)
free(con->serverAddr);
if (con->auth)
(void) __ns_ldap_freeCred(&(con->auth));
if (con->saslMechanisms) {
__s_api_free2dArray(con->saslMechanisms);
}
if (con->controls) {
__s_api_free2dArray(con->controls);
}
free(con);
}
/*
* Find a connection matching the passed in criteria. If an open
* connection with that criteria exists use it, otherwise open a
* new connection.
* Success: returns the pointer to the Connection structure
* Failure: returns NULL, error code and message should be in errorp
*/
static int
makeConnection(Connection **conp, const char *serverAddr,
const ns_cred_t *auth, ConnectionID *cID, int timeoutSec,
ns_ldap_error_t **errorp, int fail_if_new_pwd_reqd,
int nopasswd_acct_mgmt)
{
Connection *con = NULL;
ConnectionID id;
char errmsg[MAXERROR];
int rc, exit_rc = NS_LDAP_SUCCESS;
ns_server_info_t sinfo;
char *hReq, *host = NULL;
LDAP *ld = NULL;
int passwd_mgmt = 0;
if (conp == NULL || errorp == NULL || auth == NULL)
return (NS_LDAP_INVALID_PARAM);
*errorp = NULL;
*conp = NULL;
sinfo.server = NULL;
sinfo.controls = NULL;
sinfo.saslMechanisms = NULL;
if ((id = findConnection(serverAddr, auth, &con)) != -1) {
/* connection found in cache */
#ifdef DEBUG
(void) fprintf(stderr, "connection found in cache %d\n", id);
fflush(stderr);
#endif /* DEBUG */
*cID = id;
*conp = con;
return (NS_LDAP_SUCCESS);
}
if (serverAddr) {
rc = openConnection(&ld, serverAddr, auth, timeoutSec, errorp,
fail_if_new_pwd_reqd, passwd_mgmt);
if (rc == NS_LDAP_SUCCESS || rc ==
NS_LDAP_SUCCESS_WITH_INFO) {
exit_rc = rc;
rc = __s_api_requestServer(NS_CACHE_NEW, serverAddr,
&sinfo, errorp);
if (rc != NS_LDAP_SUCCESS || sinfo.server == NULL) {
(void) snprintf(errmsg, sizeof (errmsg),
gettext("makeConnection: unable to get "
"server information for %s"), serverAddr);
syslog(LOG_ERR, "libsldap: %s", errmsg);
return (NS_LDAP_OP_FAILED);
}
goto create_con;
} else {
return (rc);
}
}
/* No cached connection, create one */
for (; ; ) {
if (host == NULL)
hReq = NS_CACHE_NEW;
else
hReq = NS_CACHE_NEXT;
rc = __s_api_requestServer(hReq, host, &sinfo, errorp);
if ((rc != NS_LDAP_SUCCESS) || (sinfo.server == NULL) ||
(host && (strcasecmp(host, sinfo.server) == 0))) {
/* Log the error */
if (*errorp) {
(void) snprintf(errmsg, sizeof (errmsg),
"%s: (%s)", gettext("makeConnection: "
"unable to make LDAP connection, "
"request for a server failed"),
(*errorp)->message);
syslog(LOG_ERR, "libsldap: %s", errmsg);
}
if (sinfo.server)
free(sinfo.server);
__s_api_free2dArray(sinfo.saslMechanisms);
__s_api_free2dArray(sinfo.controls);
if (host)
free(host);
return (NS_LDAP_OP_FAILED);
}
if (host)
free(host);
host = strdup(sinfo.server);
if (host == NULL) {
free(sinfo.server);
__s_api_free2dArray(sinfo.saslMechanisms);
__s_api_free2dArray(sinfo.controls);
return (NS_LDAP_MEMORY);
}
/* check if server supports password management */
passwd_mgmt = __s_api_contain_passwd_control_oid(
sinfo.controls);
/* check if server supports password less account mgmt */
if (nopasswd_acct_mgmt &&
!__s_api_contain_account_usable_control_oid(
sinfo.controls)) {
syslog(LOG_WARNING, "libsldap: server %s does not "
"provide account information without password",
host);
free(host);
free(sinfo.server);
__s_api_free2dArray(sinfo.saslMechanisms);
__s_api_free2dArray(sinfo.controls);
return (NS_LDAP_OP_FAILED);
}
/* make the connection */
rc = openConnection(&ld, host, auth, timeoutSec, errorp,
fail_if_new_pwd_reqd, passwd_mgmt);
/* if success, go to create connection structure */
if (rc == NS_LDAP_SUCCESS ||
rc == NS_LDAP_SUCCESS_WITH_INFO) {
exit_rc = rc;
break;
}
/*
* If not able to reach the server, inform the ldap
* cache manager that the server should be removed
* from its server list. Thus, the manager will not
* return this server on the next get-server request
* and will also reduce the server list refresh TTL,
* so that it will find out sooner when the server
* is up again.
*/
if (rc == NS_LDAP_INTERNAL && *errorp != NULL) {
if ((*errorp)->status == LDAP_CONNECT_ERROR ||
(*errorp)->status == LDAP_SERVER_DOWN) {
if (__s_api_removeServer(host) < 0) {
/*
* Couldn't remove server from
* server list. Log a warning.
*/
syslog(LOG_WARNING, "libsldap: could "
"not remove %s from servers list",
host);
}
}
}
/* else, cleanup and go for the next server */
if (sinfo.server) {
free(sinfo.server);
sinfo.server = NULL;
}
__s_api_free2dArray(sinfo.saslMechanisms);
sinfo.saslMechanisms = NULL;
__s_api_free2dArray(sinfo.controls);
sinfo.controls = NULL;
if (*errorp) {
/*
* If openConnection() failed due to
* password policy, or invalid credential,
* keep *errorp and exit
*/
if ((*errorp)->pwd_mgmt.status != NS_PASSWD_GOOD ||
(*errorp)->status == LDAP_INVALID_CREDENTIALS) {
free(host);
return (rc);
} else {
(void) __ns_ldap_freeError(errorp);
*errorp = NULL;
}
}
}
create_con:
/* we have created ld, setup con structure */
if (host)
free(host);
if ((con = calloc(1, sizeof (Connection))) == NULL) {
if (sinfo.server)
free(sinfo.server);
__s_api_free2dArray(sinfo.saslMechanisms);
__s_api_free2dArray(sinfo.controls);
/*
* If password control attached in **errorp,
* e.g. rc == NS_LDAP_SUCCESS_WITH_INFO,
* free the error structure
*/
if (*errorp) {
(void) __ns_ldap_freeError(errorp);
*errorp = NULL;
}
return (NS_LDAP_MEMORY);
}
con->serverAddr = sinfo.server;
con->saslMechanisms = sinfo.saslMechanisms;
con->controls = sinfo.controls;
con->auth = __ns_ldap_dupAuth(auth);
if (con->auth == NULL) {
free(con);
/*
* If password control attached in **errorp,
* e.g. rc == NS_LDAP_SUCCESS_WITH_INFO,
* free the error structure
*/
if (*errorp) {
(void) __ns_ldap_freeError(errorp);
*errorp = NULL;
}
return (NS_LDAP_MEMORY);
}
con->threadID = thr_self();
con->ld = ld;
if ((id = addConnection(con)) == -1) {
freeConnection(con);
/*
* If password control attached in **errorp,
* e.g. rc == NS_LDAP_SUCCESS_WITH_INFO,
* free the error structure
*/
if (*errorp) {
(void) __ns_ldap_freeError(errorp);
*errorp = NULL;
}
return (NS_LDAP_MEMORY);
}
#ifdef DEBUG
(void) fprintf(stderr, "connection added into cache %d\n", id);
fflush(stderr);
#endif /* DEBUG */
*cID = id;
*conp = con;
return (exit_rc);
}
/*
* Return the specified connection to the pool. If necessary
* delete the connection.
*/
static void
_DropConnection(ConnectionID cID, int flag, int fini)
{
Connection *cp;
int id;
int use_mutex = !fini;
id = cID - CONID_OFFSET;
if (id < 0 || id >= sessionPoolSize)
return;
#ifdef DEBUG
(void) fprintf(stderr,
"Dropping connection cID=%d flag=0x%x\n", cID, flag);
fflush(stderr);
#endif /* DEBUG */
if (use_mutex)
(void) mutex_lock(&sessionPoolLock);
cp = sessionPool[id];
/* sanity check before removing */
if (!cp || (!fini && (!cp->usedBit || cp->threadID != thr_self()))) {
if (use_mutex)
(void) mutex_unlock(&sessionPoolLock);
return;
}
if (!fini &&
((flag & NS_LDAP_NEW_CONN) == 0) &&
((flag & NS_LDAP_KEEP_CONN) || nscd_proc())) {
/* release Connection (keep alive) */
cp->usedBit = B_FALSE;
cp->threadID = 0; /* unmark the threadID */
if (use_mutex)
(void) mutex_unlock(&sessionPoolLock);
} else {
/* delete Connection (disconnect) */
sessionPool[id] = NULL;
if (use_mutex)
(void) mutex_unlock(&sessionPoolLock);
(void) ldap_unbind(cp->ld);
freeConnection(cp);
}
}
void
DropConnection(ConnectionID cID, int flag)
{
_DropConnection(cID, flag, 0);
}
/*
* This routine is called after a bind operation is
* done in openConnection() to process the password
* management information, if any.
*
* Input:
* bind_type: "simple" or "sasl/DIGEST-MD5"
* ldaprc : ldap rc from the ldap bind operation
* controls : controls returned by the server
* errmsg : error message from the server
* fail_if_new_pwd_reqd:
* flag indicating if connection should be open
* when password needs to change immediately
* passwd_mgmt:
* flag indicating if server supports password
* policy/management
*
* Output : ns_ldap_error structure, which may contain
* password status and number of seconds until
* expired
*
* return rc:
* NS_LDAP_EXTERNAL: error, connection should not open
* NS_LDAP_SUCCESS_WITH_INFO: OK to open but password info attached
* NS_LDAP_SUCCESS: OK to open connection
*
*/
static int
process_pwd_mgmt(char *bind_type, int ldaprc,
LDAPControl **controls,
char *errmsg, ns_ldap_error_t **errorp,
int fail_if_new_pwd_reqd,
int passwd_mgmt)
{
char errstr[MAXERROR];
LDAPControl **ctrl = NULL;
int exit_rc;
ns_ldap_passwd_status_t pwd_status = NS_PASSWD_GOOD;
int sec_until_exp = 0;
/*
* errmsg may be an empty string,
* even if ldaprc is LDAP_SUCCESS,
* free the empty string if that's the case
*/
if (errmsg &&
(*errmsg == '\0' || ldaprc == LDAP_SUCCESS)) {
ldap_memfree(errmsg);
errmsg = NULL;
}
if (ldaprc != LDAP_SUCCESS) {
/*
* try to map ldap rc and error message to
* a password status
*/
if (errmsg) {
if (passwd_mgmt)
pwd_status =
__s_api_set_passwd_status(
ldaprc, errmsg);
ldap_memfree(errmsg);
}
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: "
"%s bind failed "
"- %s"), bind_type, ldap_err2string(ldaprc));
if (pwd_status != NS_PASSWD_GOOD) {
MKERROR_PWD_MGMT(*errorp,
ldaprc, strdup(errstr),
pwd_status, 0, NULL);
} else {
MKERROR(LOG_ERR, *errorp, ldaprc, strdup(errstr),
NULL);
}
if (controls)
ldap_controls_free(controls);
return (NS_LDAP_INTERNAL);
}
/*
* ldaprc is LDAP_SUCCESS,
* process the password management controls, if any
*/
exit_rc = NS_LDAP_SUCCESS;
if (controls && passwd_mgmt) {
/*
* The control with the OID
* 2.16.840.1.113730.3.4.4 (or
* LDAP_CONTROL_PWEXPIRED, as defined
* in the ldap.h header file) is the
* expired password control.
*
* This control is used if the server
* is configured to require users to
* change their passwords when first
* logging in and whenever the
* passwords are reset.
*
* If the user is logging in for the
* first time or if the user's
* password has been reset, the
* server sends this control to
* indicate that the client needs to
* change the password immediately.
*
* At this point, the only operation
* that the client can perform is to
* change the user's password. If the
* client requests any other LDAP
* operation, the server sends back
* an LDAP_UNWILLING_TO_PERFORM
* result code with an expired
* password control.
*
* The control with the OID
* 2.16.840.1.113730.3.4.5 (or
* LDAP_CONTROL_PWEXPIRING, as
* defined in the ldap.h header file)
* is the password expiration warning
* control.
*
* This control is used if the server
* is configured to expire user
* passwords after a certain amount
* of time.
*
* The server sends this control back
* to the client if the client binds
* using a password that will soon
* expire. The ldctl_value field of
* the LDAPControl structure
* specifies the number of seconds
* before the password will expire.
*/
for (ctrl = controls; *ctrl; ctrl++) {
if (strcmp((*ctrl)->ldctl_oid,
LDAP_CONTROL_PWEXPIRED) == 0) {
/*
* if the caller wants this bind
* to fail, set up the error info.
* If call to this function is
* for searching the LDAP directory,
* e.g., __ns_ldap_list(),
* there's really no sense to
* let a connection open and
* then fail immediately afterward
* on the LDAP search operation with
* the LDAP_UNWILLING_TO_PERFORM rc
*/
pwd_status =
NS_PASSWD_CHANGE_NEEDED;
if (fail_if_new_pwd_reqd) {
(void) snprintf(errstr,
sizeof (errstr),
gettext(
"openConnection: "
"%s bind "
"failed "
"- password "
"expired. It "
" needs to change "
"immediately!"),
bind_type);
MKERROR_PWD_MGMT(*errorp,
LDAP_SUCCESS,
strdup(errstr),
pwd_status,
0,
NULL);
exit_rc = NS_LDAP_INTERNAL;
} else {
MKERROR_PWD_MGMT(*errorp,
LDAP_SUCCESS,
NULL,
pwd_status,
0,
NULL);
exit_rc =
NS_LDAP_SUCCESS_WITH_INFO;
}
break;
} else if (strcmp((*ctrl)->ldctl_oid,
LDAP_CONTROL_PWEXPIRING) == 0) {
pwd_status =
NS_PASSWD_ABOUT_TO_EXPIRE;
if ((*ctrl)->
ldctl_value.bv_len > 0 &&
(*ctrl)->
ldctl_value.bv_val)
sec_until_exp =
atoi((*ctrl)->
ldctl_value.bv_val);
MKERROR_PWD_MGMT(*errorp,
LDAP_SUCCESS,
NULL,
pwd_status,
sec_until_exp,
NULL);
exit_rc =
NS_LDAP_SUCCESS_WITH_INFO;
break;
}
}
}
if (controls)
ldap_controls_free(controls);
return (exit_rc);
}
static int
ldap_in_hosts_switch()
{
enum __nsw_parse_err pserr;
struct __nsw_switchconfig *conf;
struct __nsw_lookup *lkp;
const char *name;
int found = 0;
conf = __nsw_getconfig("hosts", &pserr);
if (conf == NULL) {
return (-1);
}
/* check for skip and count other backends */
for (lkp = conf->lookups; lkp != NULL; lkp = lkp->next) {
name = lkp->service_name;
if (strcmp(name, "ldap") == 0) {
found = 1;
break;
}
}
__nsw_freeconfig(conf);
return (found);
}
static int
openConnection(LDAP **ldp, const char *serverAddr, const ns_cred_t *auth,
int timeoutSec, ns_ldap_error_t **errorp,
int fail_if_new_pwd_reqd, int passwd_mgmt)
{
LDAP *ld = NULL;
char *binddn, *passwd;
char *digest_md5_name;
const char *s;
int ldapVersion = LDAP_VERSION3;
int derefOption = LDAP_DEREF_ALWAYS;
int zero = 0;
int rc;
char errstr[MAXERROR];
int errnum = 0;
LDAPMessage *resultMsg;
int msgId;
int useSSL = 0;
struct timeval tv;
AuthType_t bindType;
int timeoutMilliSec = timeoutSec * 1000;
struct berval cred;
char *sslServerAddr;
char *s1;
char *errmsg;
LDAPControl **controls;
int pwd_rc;
*errorp = NULL;
*ldp = NULL;
switch (auth->auth.type) {
case NS_LDAP_AUTH_NONE:
case NS_LDAP_AUTH_SIMPLE:
case NS_LDAP_AUTH_SASL:
bindType = auth->auth.type;
break;
case NS_LDAP_AUTH_TLS:
useSSL = 1;
switch (auth->auth.tlstype) {
case NS_LDAP_TLS_NONE:
bindType = NS_LDAP_AUTH_NONE;
break;
case NS_LDAP_TLS_SIMPLE:
bindType = NS_LDAP_AUTH_SIMPLE;
break;
case NS_LDAP_TLS_SASL:
bindType = NS_LDAP_AUTH_SASL;
break;
default:
(void) sprintf(errstr,
gettext("openConnection: unsupported "
"TLS authentication method "
"(%d)"), auth->auth.tlstype);
MKERROR(LOG_WARNING, *errorp,
LDAP_AUTH_METHOD_NOT_SUPPORTED,
strdup(errstr), NULL);
return (NS_LDAP_INTERNAL);
}
break;
default:
(void) sprintf(errstr,
gettext("openConnection: unsupported "
"authentication method (%d)"), auth->auth.type);
MKERROR(LOG_WARNING, *errorp,
LDAP_AUTH_METHOD_NOT_SUPPORTED, strdup(errstr),
NULL);
return (NS_LDAP_INTERNAL);
}
if (useSSL) {
const char *hostcertpath;
char *alloc_hcp = NULL;
#ifdef DEBUG
(void) fprintf(stderr, "+++TLS transport\n");
#endif /* DEBUG */
hostcertpath = auth->hostcertpath;
if (hostcertpath == NULL) {
alloc_hcp = __s_get_hostcertpath();
hostcertpath = alloc_hcp;
}
if (hostcertpath == NULL)
return (NS_LDAP_MEMORY);
if ((rc = ldapssl_client_init(hostcertpath, NULL)) < 0) {
if (alloc_hcp)
free(alloc_hcp);
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: failed to initialize "
"TLS security (%s)"),
ldapssl_err2string(rc));
MKERROR(LOG_WARNING, *errorp, LDAP_CONNECT_ERROR,
strdup(errstr), NULL);
return (NS_LDAP_INTERNAL);
}
if (alloc_hcp)
free(alloc_hcp);
/* determine if the host name contains a port number */
s = strchr(serverAddr, ']'); /* skip over ipv6 addr */
if (s == NULL)
s = serverAddr;
s = strchr(s, ':');
if (s != NULL) {
/*
* If we do get a port number, we will try stripping
* it. At present, referrals will always have a
* port number.
*/
sslServerAddr = strdup(serverAddr);
if (sslServerAddr == NULL)
return (NS_LDAP_MEMORY);
s1 = strrchr(sslServerAddr, ':');
if (s1 != NULL)
*s1 = '\0';
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: cannot use tls with %s. "
"Trying %s"),
serverAddr, sslServerAddr);
syslog(LOG_ERR, "libsldap: %s", errstr);
} else
sslServerAddr = (char *)serverAddr;
ld = ldapssl_init(sslServerAddr, LDAPS_PORT, 1);
if (sslServerAddr != serverAddr)
free(sslServerAddr);
if (ld == NULL ||
ldapssl_install_gethostbyaddr(ld, "ldap") != 0) {
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: failed to connect "
"using TLS (%s)"), strerror(errno));
MKERROR(LOG_WARNING, *errorp, LDAP_CONNECT_ERROR,
strdup(errstr), NULL);
return (NS_LDAP_INTERNAL);
}
} else {
#ifdef DEBUG
(void) fprintf(stderr, "+++Unsecure transport\n");
#endif /* DEBUG */
/* Warning message IF cannot connect to host(s) */
if ((ld = ldap_init((char *)serverAddr, LDAP_PORT)) == NULL) {
char *p = strerror(errno);
MKERROR(LOG_WARNING, *errorp, LDAP_CONNECT_ERROR,
strdup(p), NULL);
return (NS_LDAP_INTERNAL);
} else {
/* check and avoid gethostname recursion */
if (ldap_in_hosts_switch() > 0 &&
! __s_api_isipv4((char *)serverAddr) &&
! __s_api_isipv6((char *)serverAddr)) {
/* host: ldap - found, attempt to recover */
if (ldap_set_option(ld, LDAP_X_OPT_DNS_SKIPDB,
"ldap") != 0) {
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: "
"unrecoverable gethostname "
"recursion detected "
"in /etc/nsswitch.conf"));
MKERROR(LOG_WARNING, *errorp,
LDAP_CONNECT_ERROR,
strdup(errstr), NULL);
(void) ldap_unbind(ld);
return (NS_LDAP_INTERNAL);
}
}
}
}
(void) ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION, &ldapVersion);
(void) ldap_set_option(ld, LDAP_OPT_DEREF, &derefOption);
/*
* set LDAP_OPT_REFERRALS to OFF.
* This library will handle the referral itself
* based on API flags or configuration file
* specification. If this option is not set
* to OFF, libldap will never pass the
* referral info up to this library
*/
(void) ldap_set_option(ld, LDAP_OPT_REFERRALS, LDAP_OPT_OFF);
(void) ldap_set_option(ld, LDAP_OPT_TIMELIMIT, &zero);
(void) ldap_set_option(ld, LDAP_OPT_SIZELIMIT, &zero);
/* setup TCP/IP connect timeout */
(void) ldap_set_option(ld, LDAP_X_OPT_CONNECT_TIMEOUT,
&timeoutMilliSec);
/* retry if LDAP I/O was interrupted */
(void) ldap_set_option(ld, LDAP_OPT_RESTART, LDAP_OPT_ON);
switch (bindType) {
case NS_LDAP_AUTH_NONE:
#ifdef DEBUG
(void) fprintf(stderr, "+++Anonymous bind\n");
#endif /* DEBUG */
break;
case NS_LDAP_AUTH_SIMPLE:
binddn = auth->cred.unix_cred.userID;
passwd = auth->cred.unix_cred.passwd;
if (passwd == NULL || *passwd == '\0' ||
binddn == NULL || *binddn == '\0') {
(void) sprintf(errstr, gettext("openConnection: "
"missing credentials for Simple bind"));
MKERROR(LOG_WARNING, *errorp, LDAP_INVALID_CREDENTIALS,
strdup(errstr), NULL);
(void) ldap_unbind(ld);
return (NS_LDAP_INTERNAL);
}
#ifdef DEBUG
(void) fprintf(stderr, "+++Simple bind\n");
#endif /* DEBUG */
msgId = ldap_simple_bind(ld, binddn, passwd);
if (msgId == -1) {
(void) ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER,
(void *)&errnum);
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: simple bind failed "
"- %s"), ldap_err2string(errnum));
(void) ldap_unbind(ld);
MKERROR(LOG_WARNING, *errorp, errnum, strdup(errstr),
NULL);
return (NS_LDAP_INTERNAL);
}
tv.tv_sec = timeoutSec;
tv.tv_usec = 0;
rc = ldap_result(ld, msgId, 0, &tv, &resultMsg);
if ((rc == -1) || (rc == 0)) {
(void) ldap_get_option(ld, LDAP_OPT_ERROR_NUMBER,
(void *)&errnum);
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: simple bind failed "
"- %s"), ldap_err2string(errnum));
(void) ldap_msgfree(resultMsg);
(void) ldap_unbind(ld);
MKERROR(LOG_WARNING, *errorp, errnum, strdup(errstr),
NULL);
return (NS_LDAP_INTERNAL);
}
/*
* get ldaprc, controls, and error msg
*/
rc = ldap_parse_result(ld, resultMsg, &errnum, NULL,
&errmsg, NULL, &controls, 1);
if (rc != LDAP_SUCCESS) {
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: simple bind failed "
"- unable to parse result"));
(void) ldap_unbind(ld);
MKERROR(LOG_WARNING, *errorp, NS_LDAP_INTERNAL,
strdup(errstr), NULL);
return (NS_LDAP_INTERNAL);
}
/* process the password management info, if any */
pwd_rc = process_pwd_mgmt("simple",
errnum, controls, errmsg,
errorp,
fail_if_new_pwd_reqd,
passwd_mgmt);
if (pwd_rc == NS_LDAP_INTERNAL) {
(void) ldap_unbind(ld);
return (pwd_rc);
}
if (pwd_rc == NS_LDAP_SUCCESS_WITH_INFO) {
*ldp = ld;
return (pwd_rc);
}
break;
case NS_LDAP_AUTH_SASL:
/* We don't support any sasl options yet */
if (auth->auth.saslopt != NS_LDAP_SASLOPT_NONE) {
(void) sprintf(errstr,
gettext("openConnection: SASL options are "
"not supported (%d)"), auth->auth.saslopt);
MKERROR(LOG_WARNING, *errorp,
LDAP_AUTH_METHOD_NOT_SUPPORTED,
strdup(errstr), NULL);
(void) ldap_unbind(ld);
return (NS_LDAP_INTERNAL);
}
binddn = auth->cred.unix_cred.userID;
passwd = auth->cred.unix_cred.passwd;
if (passwd == NULL || *passwd == '\0' ||
binddn == NULL || *binddn == '\0') {
(void) sprintf(errstr,
gettext("openConnection: missing credentials "
"for SASL bind"));
MKERROR(LOG_WARNING, *errorp, LDAP_INVALID_CREDENTIALS,
strdup(errstr), NULL);
(void) ldap_unbind(ld);
return (NS_LDAP_INTERNAL);
}
cred.bv_val = passwd;
cred.bv_len = strlen(passwd);
switch (auth->auth.saslmech) {
case NS_LDAP_SASL_CRAM_MD5:
/*
* NOTE: if iDS changes to support cram_md5,
* please add password management code here.
* Since ldap_sasl_cram_md5_bind_s does not
* return anything that could be used to
* extract the ldap rc/errmsg/control to
* determine if bind failed due to password
* policy, a new cram_md5_bind API will need
* to be introduced. See
* ldap_x_sasl_digest_md5_bind() and case
* NS_LDAP_SASL_DIGEST_MD5 below for details.
*/
if ((rc = ldap_sasl_cram_md5_bind_s(ld, binddn,
&cred, NULL, NULL)) != LDAP_SUCCESS) {
(void) ldap_get_option(ld,
LDAP_OPT_ERROR_NUMBER, (void *)&errnum);
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: "
"sasl/CRAM-MD5 bind failed - %s"),
ldap_err2string(errnum));
MKERROR(LOG_WARNING, *errorp, errnum,
strdup(errstr), NULL);
(void) ldap_unbind(ld);
return (NS_LDAP_INTERNAL);
}
break;
case NS_LDAP_SASL_DIGEST_MD5:
digest_md5_name = malloc(strlen(binddn) + 5);
/* 5 = strlen("dn: ") + 1 */
if (digest_md5_name == NULL) {
(void) ldap_unbind(ld);
return (NS_LDAP_MEMORY);
}
(void) strcpy(digest_md5_name, "dn: ");
(void) strcat(digest_md5_name, binddn);
tv.tv_sec = timeoutSec;
tv.tv_usec = 0;
rc = ldap_x_sasl_digest_md5_bind(ld,
digest_md5_name, &cred, NULL, NULL,
&tv, &resultMsg);
if (resultMsg == NULL) {
free(digest_md5_name);
(void) ldap_get_option(ld,
LDAP_OPT_ERROR_NUMBER, (void *)&errnum);
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: "
"DIGEST-MD5 bind failed - %s"),
ldap_err2string(errnum));
(void) ldap_unbind(ld);
MKERROR(LOG_WARNING, *errorp, errnum,
strdup(errstr), NULL);
return (NS_LDAP_INTERNAL);
}
/*
* get ldaprc, controls, and error msg
*/
rc = ldap_parse_result(ld, resultMsg, &errnum, NULL,
&errmsg, NULL, &controls, 1);
if (rc != LDAP_SUCCESS) {
free(digest_md5_name);
(void) snprintf(errstr, sizeof (errstr),
gettext("openConnection: "
"DIGEST-MD5 bind failed "
"- unable to parse result"));
(void) ldap_unbind(ld);
MKERROR(LOG_WARNING, *errorp, NS_LDAP_INTERNAL,
strdup(errstr), NULL);
return (NS_LDAP_INTERNAL);
}
/* process the password management info, if any */
pwd_rc = process_pwd_mgmt("sasl/DIGEST-MD5",
errnum, controls, errmsg,
errorp,
fail_if_new_pwd_reqd,
passwd_mgmt);
if (pwd_rc == NS_LDAP_INTERNAL) {
free(digest_md5_name);
(void) ldap_unbind(ld);
return (pwd_rc);
}
if (pwd_rc == NS_LDAP_SUCCESS_WITH_INFO) {
*ldp = ld;
return (pwd_rc);
}
free(digest_md5_name);
break;
default:
(void) ldap_unbind(ld);
(void) sprintf(errstr,
gettext("openConnection: unsupported SASL "
"mechanism (%d)"), auth->auth.saslmech);
MKERROR(LOG_WARNING, *errorp,
LDAP_AUTH_METHOD_NOT_SUPPORTED, strdup(errstr),
NULL);
return (NS_LDAP_INTERNAL);
}
}
*ldp = ld;
return (NS_LDAP_SUCCESS);
}
/*
* FUNCTION: __s_api_getDefaultAuth
*
* Constructs a credential for authentication using the config module.
*
* RETURN VALUES:
*
* NS_LDAP_SUCCESS If successful
* NS_LDAP_CONFIG If there are any config errors.
* NS_LDAP_MEMORY Memory errors.
* NS_LDAP_OP_FAILED If there are no more authentication methods so can
* not build a new authp.
* NS_LDAP_INVALID_PARAM This overloaded return value means that some of the
* necessary fields of a cred for a given auth method
* are not provided.
* INPUT:
*
* cLevel Currently requested credential level to be tried
*
* aMethod Currently requested authentication method to be tried
*
* OUTPUT:
*
* authp authentication method to use.
*/
static int
__s_api_getDefaultAuth(
int *cLevel,
ns_auth_t *aMethod,
ns_cred_t **authp)
{
void **paramVal = NULL;
char *modparamVal = NULL;
int getUid = 0;
int getPasswd = 0;
int getCertpath = 0;
int rc = 0;
ns_ldap_error_t *errorp = NULL;
#ifdef DEBUG
(void) fprintf(stderr, "__s_api_getDefaultAuth START\n");
#endif
if (aMethod == NULL) {
/* Require an Auth */
return (NS_LDAP_INVALID_PARAM);
}
/*
* Do not differentiate between (proxy/self) at this time, but
* reject self credential levels at this time
*/
if (cLevel && *cLevel == NS_LDAP_CRED_SELF)
return (NS_LDAP_INVALID_PARAM);
*authp = (ns_cred_t *)calloc(1, sizeof (ns_cred_t));
if ((*authp) == NULL)
return (NS_LDAP_MEMORY);
(*authp)->auth = *aMethod;
switch (aMethod->type) {
case NS_LDAP_AUTH_NONE:
return (NS_LDAP_SUCCESS);
case NS_LDAP_AUTH_SIMPLE:
getUid++;
getPasswd++;
break;
case NS_LDAP_AUTH_SASL:
if ((aMethod->saslmech == NS_LDAP_SASL_DIGEST_MD5) ||
(aMethod->saslmech == NS_LDAP_SASL_CRAM_MD5)) {
getUid++;
getPasswd++;
} else {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_INVALID_PARAM);
}
break;
case NS_LDAP_AUTH_TLS:
if ((aMethod->tlstype == NS_LDAP_TLS_SIMPLE) ||
((aMethod->tlstype == NS_LDAP_TLS_SASL) &&
((aMethod->saslmech == NS_LDAP_SASL_DIGEST_MD5) ||
(aMethod->saslmech == NS_LDAP_SASL_CRAM_MD5)))) {
getUid++;
getPasswd++;
getCertpath++;
} else if (aMethod->tlstype == NS_LDAP_TLS_NONE) {
getCertpath++;
} else {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_INVALID_PARAM);
}
break;
}
if (getUid) {
paramVal = NULL;
if ((rc = __ns_ldap_getParam(NS_LDAP_BINDDN_P,
&paramVal, &errorp)) != NS_LDAP_SUCCESS) {
(void) __ns_ldap_freeCred(authp);
(void) __ns_ldap_freeError(&errorp);
*authp = NULL;
return (rc);
}
if (paramVal == NULL || *paramVal == NULL) {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_INVALID_PARAM);
}
(*authp)->cred.unix_cred.userID = strdup((char *)*paramVal);
(void) __ns_ldap_freeParam(&paramVal);
if ((*authp)->cred.unix_cred.userID == NULL) {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_MEMORY);
}
}
if (getPasswd) {
paramVal = NULL;
if ((rc = __ns_ldap_getParam(NS_LDAP_BINDPASSWD_P,
&paramVal, &errorp)) != NS_LDAP_SUCCESS) {
(void) __ns_ldap_freeCred(authp);
(void) __ns_ldap_freeError(&errorp);
*authp = NULL;
return (rc);
}
if (paramVal == NULL || *paramVal == NULL) {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_INVALID_PARAM);
}
modparamVal = dvalue((char *)*paramVal);
(void) __ns_ldap_freeParam(&paramVal);
if (modparamVal == NULL || (strlen((char *)modparamVal) == 0)) {
(void) __ns_ldap_freeCred(authp);
if (modparamVal != NULL)
free(modparamVal);
*authp = NULL;
return (NS_LDAP_INVALID_PARAM);
}
(*authp)->cred.unix_cred.passwd = modparamVal;
}
if (getCertpath) {
paramVal = NULL;
if ((rc = __ns_ldap_getParam(NS_LDAP_HOST_CERTPATH_P,
&paramVal, &errorp)) != NS_LDAP_SUCCESS) {
(void) __ns_ldap_freeCred(authp);
(void) __ns_ldap_freeError(&errorp);
*authp = NULL;
return (rc);
}
if (paramVal == NULL || *paramVal == NULL) {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_INVALID_PARAM);
}
(*authp)->hostcertpath = strdup((char *)*paramVal);
(void) __ns_ldap_freeParam(&paramVal);
if ((*authp)->hostcertpath == NULL) {
(void) __ns_ldap_freeCred(authp);
*authp = NULL;
return (NS_LDAP_MEMORY);
}
}
return (NS_LDAP_SUCCESS);
}
/*
* FUNCTION: __s_api_getConnection
*
* Bind to the specified server or one from the server
* list and return the pointer.
*
* This function can rebind or not (NS_LDAP_HARD), it can require a
* credential or bind anonymously
*
* This function follows the DUA configuration schema algorithm
*
* RETURN VALUES:
*
* NS_LDAP_SUCCESS A connection was made successfully.
* NS_LDAP_SUCCESS_WITH_INFO
* A connection was made successfully, but with
* password management info in *errorp
* NS_LDAP_INVALID_PARAM If any invalid arguments were passed to the function.
* NS_LDAP_CONFIG If there are any config errors.
* NS_LDAP_MEMORY Memory errors.
* NS_LDAP_INTERNAL If there was a ldap error.
*
* INPUT:
*
* server Bind to this LDAP server only
* flags If NS_LDAP_HARD is set function will not return until it has
* a connection unless there is a authentication problem.
* If NS_LDAP_NEW_CONN is set the function must force a new
* connection to be created
* If NS_LDAP_KEEP_CONN is set the connection is to be kept open
* auth Credentials for bind. This could be NULL in which case
* a default cred built from the config module is used.
* sessionId cookie that points to a previous session
* fail_if_new_pwd_reqd
* a flag indicating this function should fail if the passwd
* in auth needs to change immediately
* nopasswd_acct_mgmt
* a flag indicating that makeConnection should check before
* binding if server supports LDAP V3 password less
* account management
*
* OUTPUT:
*
* session pointer to a session with connection information
* errorp Set if there are any INTERNAL, or CONFIG error.
*/
int
__s_api_getConnection(
const char *server,
const int flags,
const ns_cred_t *cred, /* credentials for bind */
ConnectionID *sessionId,
Connection **session,
ns_ldap_error_t **errorp,
int fail_if_new_pwd_reqd,
int nopasswd_acct_mgmt)
{
char errmsg[MAXERROR];
ns_auth_t **aMethod = NULL;
ns_auth_t **aNext = NULL;
int **cLevel = NULL;
int **cNext = NULL;
int timeoutSec = NS_DEFAULT_BIND_TIMEOUT;
int rc;
Connection *con = NULL;
int sec = 1;
ns_cred_t *authp = NULL;
ns_cred_t anon;
int version = NS_LDAP_V2;
void **paramVal = NULL;
if ((session == NULL) || (sessionId == NULL)) {
return (NS_LDAP_INVALID_PARAM);
}
*session = NULL;
/* if we already have a session id try to reuse connection */
if (*sessionId > 0) {
rc = findConnectionById(flags, cred, *sessionId, &con);
if (rc == *sessionId && con) {
*session = con;
return (NS_LDAP_SUCCESS);
}
*sessionId = 0;
}
/* get profile version number */
if ((rc = __ns_ldap_getParam(NS_LDAP_FILE_VERSION_P,
&paramVal, errorp)) != NS_LDAP_SUCCESS)
return (rc);
if (paramVal == NULL) {
(void) sprintf(errmsg, gettext("getConnection: no file "
"version"));
MKERROR(LOG_WARNING, *errorp, NS_CONFIG_FILE, strdup(errmsg),
NS_LDAP_CONFIG);
return (NS_LDAP_CONFIG);
}
if (strcasecmp((char *)*paramVal, NS_LDAP_VERSION_1) == 0)
version = NS_LDAP_V1;
(void) __ns_ldap_freeParam((void ***)&paramVal);
/* Get the bind timeout value */
(void) __ns_ldap_getParam(NS_LDAP_BIND_TIME_P, &paramVal, errorp);
if (paramVal != NULL && *paramVal != NULL) {
timeoutSec = **((int **)paramVal);
(void) __ns_ldap_freeParam(&paramVal);
}
if (*errorp)
(void) __ns_ldap_freeError(errorp);
if (cred == NULL) {
/* Get the authentication method list */
if ((rc = __ns_ldap_getParam(NS_LDAP_AUTH_P,
(void ***)&aMethod, errorp)) != NS_LDAP_SUCCESS)
return (rc);
if (aMethod == NULL) {
aMethod = (ns_auth_t **)calloc(2, sizeof (ns_auth_t *));
if (aMethod == NULL)
return (NS_LDAP_MEMORY);
aMethod[0] = (ns_auth_t *)calloc(1, sizeof (ns_auth_t));
if (aMethod[0] == NULL) {
free(aMethod);
return (NS_LDAP_MEMORY);
}
if (version == NS_LDAP_V1)
(aMethod[0])->type = NS_LDAP_AUTH_SIMPLE;
else {
(aMethod[0])->type = NS_LDAP_AUTH_SASL;
(aMethod[0])->saslmech =
NS_LDAP_SASL_DIGEST_MD5;
(aMethod[0])->saslopt = NS_LDAP_SASLOPT_NONE;
}
}
/* Get the credential level list */
if ((rc = __ns_ldap_getParam(NS_LDAP_CREDENTIAL_LEVEL_P,
(void ***)&cLevel, errorp)) != NS_LDAP_SUCCESS) {
(void) __ns_ldap_freeParam((void ***)&aMethod);
return (rc);
}
if (cLevel == NULL) {
cLevel = (int **)calloc(2, sizeof (int *));
if (cLevel == NULL)
return (NS_LDAP_MEMORY);
cLevel[0] = (int *)calloc(1, sizeof (int));
if (cLevel[0] == NULL)
return (NS_LDAP_MEMORY);
if (version == NS_LDAP_V1)
*(cLevel[0]) = NS_LDAP_CRED_PROXY;
else
*(cLevel[0]) = NS_LDAP_CRED_ANON;
}
}
/* setup the anon credential for anonymous connection */
(void) memset(&anon, 0, sizeof (ns_cred_t));
anon.auth.type = NS_LDAP_AUTH_NONE;
for (; ; ) {
if (cred != NULL) {
/* using specified auth method */
rc = makeConnection(&con, server, cred,
sessionId, timeoutSec, errorp,
fail_if_new_pwd_reqd, nopasswd_acct_mgmt);
if (rc == NS_LDAP_SUCCESS ||
rc == NS_LDAP_SUCCESS_WITH_INFO) {
*session = con;
break;
}
} else {
/* for every cred level */
for (cNext = cLevel; *cNext != NULL; cNext++) {
if (**cNext == NS_LDAP_CRED_ANON) {
/* make connection anonymously */
rc = makeConnection(&con, server, &anon,
sessionId, timeoutSec, errorp,
fail_if_new_pwd_reqd,
nopasswd_acct_mgmt);
if (rc == NS_LDAP_SUCCESS ||
rc ==
NS_LDAP_SUCCESS_WITH_INFO) {
*session = con;
goto done;
}
continue;
}
/* for each cred level */
for (aNext = aMethod; *aNext != NULL; aNext++) {
/* make connection and authenticate */
/* with default credentials */
authp = NULL;
rc = __s_api_getDefaultAuth(*cNext,
*aNext, &authp);
if (rc != NS_LDAP_SUCCESS) {
continue;
}
rc = makeConnection(&con, server, authp,
sessionId, timeoutSec, errorp,
fail_if_new_pwd_reqd,
nopasswd_acct_mgmt);
(void) __ns_ldap_freeCred(&authp);
if (rc == NS_LDAP_SUCCESS ||
rc ==
NS_LDAP_SUCCESS_WITH_INFO) {
*session = con;
goto done;
}
}
}
}
if (flags & NS_LDAP_HARD) {
if (sec < LDAPMAXHARDLOOKUPTIME)
sec *= 2;
_sleep(sec);
} else {
break;
}
}
done:
(void) __ns_ldap_freeParam((void ***)&aMethod);
(void) __ns_ldap_freeParam((void ***)&cLevel);
return (rc);
}
#pragma fini(_free_sessionPool)
static void
_free_sessionPool()
{
int id;
(void) mutex_lock(&sessionPoolLock);
if (sessionPool != NULL) {
for (id = 0; id < sessionPoolSize; id++)
_DropConnection(id + CONID_OFFSET, 0, 1);
free(sessionPool);
sessionPool = NULL;
sessionPoolSize = 0;
}
(void) mutex_unlock(&sessionPoolLock);
}