git.sur5r.net Git - openldap/blob - contrib/slapd-modules/nssov/nssov.c

   1 /* nssov.c - nss-ldap overlay for slapd */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2008-2010 The OpenLDAP Foundation.
   6  * Portions Copyright 2008 by Howard Chu, Symas Corp.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This code references portions of the nss-ldapd package
  19  * written by Arthur de Jong. The nss-ldapd code was forked
  20  * from the nss-ldap library written by Luke Howard.
  21  */
  22
  23 #include "nssov.h"
  24
  25 #ifndef SLAPD_OVER_NSSOV
  26 #define SLAPD_OVER_NSSOV SLAPD_MOD_DYNAMIC
  27 #endif
  28
  29 #include "../slapd/config.h"    /* not nss-ldapd config.h */
  30
  31 #include "lutil.h"
  32
  33 #include <ac/errno.h>
  34 #include <ac/unistd.h>
  35 #include <fcntl.h>
  36 #include <sys/stat.h>
  37
  38 AttributeDescription *nssov_pam_host_ad;
  39 AttributeDescription *nssov_pam_svc_ad;
  40
  41 /* buffer sizes for I/O */
  42 #define READBUFFER_MINSIZE 32
  43 #define READBUFFER_MAXSIZE 64
  44 #define WRITEBUFFER_MINSIZE 64
  45 #define WRITEBUFFER_MAXSIZE 64*1024
  46
  47 /* Find the given attribute's value in the RDN of the DN */
  48 int nssov_find_rdnval(struct berval *dn, AttributeDescription *ad, struct berval *value)
  49 {
  50         struct berval rdn;
  51         char *next;
  52
  53         BER_BVZERO(value);
  54         dnRdn( dn, &rdn );
  55         do {
  56                 next = ber_bvchr( &rdn, '+' );
  57                 if ( rdn.bv_val[ad->ad_cname.bv_len] == '=' &&
  58                         !ber_bvcmp( &rdn, &ad->ad_cname )) {
  59                         if ( next )
  60                                 rdn.bv_len = next - rdn.bv_val;
  61                         value->bv_val = rdn.bv_val + ad->ad_cname.bv_len + 1;
  62                         value->bv_len = rdn.bv_len - ad->ad_cname.bv_len - 1;
  63                         break;
  64                 }
  65                 if ( !next )
  66                         break;
  67                 next++;
  68                 rdn.bv_len -= next - rdn.bv_val;
  69                 rdn.bv_val = next;
  70         } while (1);
  71 }
  72
  73 /* create a search filter using a name that requires escaping */
  74 int nssov_filter_byname(nssov_mapinfo *mi,int key,struct berval *name,struct berval *buf)
  75 {
  76         char buf2[1024];
  77         struct berval bv2 = {sizeof(buf2),buf2};
  78
  79         /* escape attribute */
  80         if (nssov_escape(name,&bv2))
  81                 return -1;
  82         /* build filter */
  83         if (bv2.bv_len + mi->mi_filter.bv_len + mi->mi_attrs[key].an_desc->ad_cname.bv_len + 6 >
  84                 buf->bv_len )
  85                 return -1;
  86         buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))",
  87                 mi->mi_filter.bv_val, mi->mi_attrs[key].an_desc->ad_cname.bv_val,
  88                 bv2.bv_val );
  89         return 0;
  90 }
  91
  92 /* create a search filter using a string converted from an int */
  93 int nssov_filter_byid(nssov_mapinfo *mi,int key,struct berval *id,struct berval *buf)
  94 {
  95         /* build filter */
  96         if (id->bv_len + mi->mi_filter.bv_len + mi->mi_attrs[key].an_desc->ad_cname.bv_len + 6 >
  97                 buf->bv_len )
  98                 return -1;
  99         buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))",
 100                 mi->mi_filter.bv_val, mi->mi_attrs[key].an_desc->ad_cname.bv_val,
 101                 id->bv_val );
 102         return 0;
 103 }
 104
 105 void get_userpassword(struct berval *attr,struct berval *pw)
 106 {
 107         int i;
 108         /* go over the entries and return the remainder of the value if it
 109                  starts with {crypt} or crypt$ */
 110         for (i=0;!BER_BVISNULL(&attr[i]);i++)
 111         {
 112                 if (strncasecmp(attr[i].bv_val,"{crypt}",7)==0) {
 113                         pw->bv_val = attr[i].bv_val + 7;
 114                         pw->bv_len = attr[i].bv_len - 7;
 115                         return;
 116                 }
 117                 if (strncasecmp(attr[i].bv_val,"crypt$",6)==0) {
 118                         pw->bv_val = attr[i].bv_val + 6;
 119                         pw->bv_len = attr[i].bv_len - 6;
 120                         return;
 121                 }
 122         }
 123         /* just return the first value completely */
 124         *pw = *attr;
 125         /* TODO: support more password formats e.g. SMD5
 126                 (which is $1$ but in a different format)
 127                 (any code for this is more than welcome) */
 128 }
 129
 130 /* this writes a single address to the stream */
 131 int write_address(TFILE *fp,struct berval *addr)
 132 {
 133         int32_t tmpint32;
 134         struct in_addr ipv4addr;
 135         struct in6_addr ipv6addr;
 136         /* try to parse the address as IPv4 first, fall back to IPv6 */
 137         if (inet_pton(AF_INET,addr->bv_val,&ipv4addr)>0)
 138         {
 139                 /* write address type */
 140                 WRITE_INT32(fp,AF_INET);
 141                 /* write the address length */
 142                 WRITE_INT32(fp,sizeof(struct in_addr));
 143                 /* write the address itself (in network byte order) */
 144                 WRITE_TYPE(fp,ipv4addr,struct in_addr);
 145         }
 146         else if (inet_pton(AF_INET6,addr->bv_val,&ipv6addr)>0)
 147         {
 148                 /* write address type */
 149                 WRITE_INT32(fp,AF_INET6);
 150                 /* write the address length */
 151                 WRITE_INT32(fp,sizeof(struct in6_addr));
 152                 /* write the address itself (in network byte order) */
 153                 WRITE_TYPE(fp,ipv6addr,struct in6_addr);
 154         }
 155         else
 156         {
 157                 /* failure, log but write simple invalid address
 158                          (otherwise the address list is messed up) */
 159                 /* TODO: have error message in correct format */
 160                 Debug(LDAP_DEBUG_ANY,"nssov: unparseable address: %s\n",addr->bv_val,0,0);
 161                 /* write an illegal address type */
 162                 WRITE_INT32(fp,-1);
 163                 /* write an empty address */
 164                 WRITE_INT32(fp,0);
 165         }
 166         /* we're done */
 167         return 0;
 168 }
 169
 170 int read_address(TFILE *fp,char *addr,int *addrlen,int *af)
 171 {
 172         int32_t tmpint32;
 173         int len;
 174         /* read address family */
 175         READ_INT32(fp,*af);
 176         if ((*af!=AF_INET)&&(*af!=AF_INET6))
 177         {
 178                 Debug(LDAP_DEBUG_ANY,"nssov: incorrect address family specified: %d\n",*af,0,0);
 179                 return -1;
 180         }
 181         /* read address length */
 182         READ_INT32(fp,len);
 183         if ((len>*addrlen)||(len<=0))
 184         {
 185                 Debug(LDAP_DEBUG_ANY,"nssov: address length incorrect: %d\n",len,0,0);
 186                 return -1;
 187         }
 188         *addrlen=len;
 189         /* read address */
 190         READ(fp,addr,len);
 191         /* we're done */
 192         return 0;
 193 }
 194
 195 int nssov_escape(struct berval *src,struct berval *dst)
 196 {
 197         size_t pos=0;
 198         int i;
 199         /* go over all characters in source string */
 200         for (i=0;i<src->bv_len;i++)
 201         {
 202                 /* check if char will fit */
 203                 if (pos>=(dst->bv_len-4))
 204                         return -1;
 205                 /* do escaping for some characters */
 206                 switch (src->bv_val[i])
 207                 {
 208                         case '*':
 209                                 strcpy(dst->bv_val+pos,"\\2a");
 210                                 pos+=3;
 211                                 break;
 212                         case '(':
 213                                 strcpy(dst->bv_val+pos,"\\28");
 214                                 pos+=3;
 215                                 break;
 216                         case ')':
 217                                 strcpy(dst->bv_val+pos,"\\29");
 218                                 pos+=3;
 219                                 break;
 220                         case '\\':
 221                                 strcpy(dst->bv_val+pos,"\\5c");
 222                                 pos+=3;
 223                                 break;
 224                         default:
 225                                 /* just copy character */
 226                                 dst->bv_val[pos++]=src->bv_val[i];
 227                                 break;
 228                 }
 229         }
 230         /* terminate destination string */
 231         dst->bv_val[pos]='\0';
 232         dst->bv_len = pos;
 233         return 0;
 234 }
 235
 236 /* read the version information and action from the stream
 237    this function returns the read action in location pointer to by action */
 238 static int read_header(TFILE *fp,int32_t *action)
 239 {
 240   int32_t tmpint32;
 241   /* read the protocol version */
 242   READ_TYPE(fp,tmpint32,int32_t);
 243   if (tmpint32 != (int32_t)NSLCD_VERSION)
 244   {
 245     Debug( LDAP_DEBUG_TRACE,"nssov: wrong nslcd version id (%d)\n",(int)tmpint32,0,0);
 246     return -1;
 247   }
 248   /* read the request type */
 249   READ(fp,action,sizeof(int32_t));
 250   return 0;
 251 }
 252
 253 /* read a request message, returns <0 in case of errors,
 254    this function closes the socket */
 255 static void handleconnection(nssov_info *ni,int sock,Operation *op)
 256 {
 257   TFILE *fp;
 258   int32_t action;
 259   struct timeval readtimeout,writetimeout;
 260   uid_t uid;
 261   gid_t gid;
 262   char authid[sizeof("gidNumber=4294967295+uidNumber=424967295,cn=peercred,cn=external,cn=auth")];
 263
 264   /* log connection */
 265   if (lutil_getpeereid(sock,&uid,&gid))
 266     Debug( LDAP_DEBUG_TRACE,"nssov: connection from unknown client: %s\n",strerror(errno),0,0);
 267   else
 268     Debug( LDAP_DEBUG_TRACE,"nssov: connection from uid=%d gid=%d\n",
 269                       (int)uid,(int)gid,0);
 270
 271   /* Should do authid mapping too */
 272   op->o_dn.bv_len = sprintf(authid,"gidNumber=%d+uidNumber=%d,cn=peercred,cn=external,cn=auth",
 273         (int)uid, (int)gid );
 274   op->o_dn.bv_val = authid;
 275   op->o_ndn = op->o_dn;
 276
 277   /* set the timeouts */
 278   readtimeout.tv_sec=0; /* clients should send their request quickly */
 279   readtimeout.tv_usec=500000;
 280   writetimeout.tv_sec=5; /* clients could be taking some time to process the results */
 281   writetimeout.tv_usec=0;
 282   /* create a stream object */
 283   if ((fp=tio_fdopen(sock,&readtimeout,&writetimeout,
 284                      READBUFFER_MINSIZE,READBUFFER_MAXSIZE,
 285                      WRITEBUFFER_MINSIZE,WRITEBUFFER_MAXSIZE))==NULL)
 286   {
 287     Debug( LDAP_DEBUG_ANY,"nssov: cannot create stream for writing: %s",strerror(errno),0,0);
 288     (void)close(sock);
 289     return;
 290   }
 291   /* read request */
 292   if (read_header(fp,&action))
 293   {
 294     (void)tio_close(fp);
 295     return;
 296   }
 297   /* handle request */
 298   switch (action)
 299   {
 300     case NSLCD_ACTION_ALIAS_BYNAME:     (void)nssov_alias_byname(ni,fp,op); break;
 301     case NSLCD_ACTION_ALIAS_ALL:        (void)nssov_alias_all(ni,fp,op); break;
 302     case NSLCD_ACTION_ETHER_BYNAME:     (void)nssov_ether_byname(ni,fp,op); break;
 303     case NSLCD_ACTION_ETHER_BYETHER:    (void)nssov_ether_byether(ni,fp,op); break;
 304     case NSLCD_ACTION_ETHER_ALL:        (void)nssov_ether_all(ni,fp,op); break;
 305     case NSLCD_ACTION_GROUP_BYNAME:     (void)nssov_group_byname(ni,fp,op); break;
 306     case NSLCD_ACTION_GROUP_BYGID:      (void)nssov_group_bygid(ni,fp,op); break;
 307     case NSLCD_ACTION_GROUP_BYMEMBER:   (void)nssov_group_bymember(ni,fp,op); break;
 308     case NSLCD_ACTION_GROUP_ALL:        (void)nssov_group_all(ni,fp,op); break;
 309     case NSLCD_ACTION_HOST_BYNAME:      (void)nssov_host_byname(ni,fp,op); break;
 310     case NSLCD_ACTION_HOST_BYADDR:      (void)nssov_host_byaddr(ni,fp,op); break;
 311     case NSLCD_ACTION_HOST_ALL:         (void)nssov_host_all(ni,fp,op); break;
 312     case NSLCD_ACTION_NETGROUP_BYNAME:  (void)nssov_netgroup_byname(ni,fp,op); break;
 313     case NSLCD_ACTION_NETWORK_BYNAME:   (void)nssov_network_byname(ni,fp,op); break;
 314     case NSLCD_ACTION_NETWORK_BYADDR:   (void)nssov_network_byaddr(ni,fp,op); break;
 315     case NSLCD_ACTION_NETWORK_ALL:      (void)nssov_network_all(ni,fp,op); break;
 316     case NSLCD_ACTION_PASSWD_BYNAME:    (void)nssov_passwd_byname(ni,fp,op); break;
 317     case NSLCD_ACTION_PASSWD_BYUID:     (void)nssov_passwd_byuid(ni,fp,op); break;
 318     case NSLCD_ACTION_PASSWD_ALL:       (void)nssov_passwd_all(ni,fp,op); break;
 319     case NSLCD_ACTION_PROTOCOL_BYNAME:  (void)nssov_protocol_byname(ni,fp,op); break;
 320     case NSLCD_ACTION_PROTOCOL_BYNUMBER:(void)nssov_protocol_bynumber(ni,fp,op); break;
 321     case NSLCD_ACTION_PROTOCOL_ALL:     (void)nssov_protocol_all(ni,fp,op); break;
 322     case NSLCD_ACTION_RPC_BYNAME:       (void)nssov_rpc_byname(ni,fp,op); break;
 323     case NSLCD_ACTION_RPC_BYNUMBER:     (void)nssov_rpc_bynumber(ni,fp,op); break;
 324     case NSLCD_ACTION_RPC_ALL:          (void)nssov_rpc_all(ni,fp,op); break;
 325     case NSLCD_ACTION_SERVICE_BYNAME:   (void)nssov_service_byname(ni,fp,op); break;
 326     case NSLCD_ACTION_SERVICE_BYNUMBER: (void)nssov_service_bynumber(ni,fp,op); break;
 327     case NSLCD_ACTION_SERVICE_ALL:      (void)nssov_service_all(ni,fp,op); break;
 328     case NSLCD_ACTION_SHADOW_BYNAME:    if (uid==0) (void)nssov_shadow_byname(ni,fp,op); break;
 329     case NSLCD_ACTION_SHADOW_ALL:       if (uid==0) (void)nssov_shadow_all(ni,fp,op); break;
 330         case NSLCD_ACTION_PAM_AUTHC:            (void)pam_authc(ni,fp,op); break;
 331         case NSLCD_ACTION_PAM_AUTHZ:            (void)pam_authz(ni,fp,op); break;
 332         case NSLCD_ACTION_PAM_SESS_O:           if (uid==0) (void)pam_sess_o(ni,fp,op); break;
 333         case NSLCD_ACTION_PAM_SESS_C:           if (uid==0) (void)pam_sess_c(ni,fp,op); break;
 334         case NSLCD_ACTION_PAM_PWMOD:            (void)pam_pwmod(ni,fp,op); break;
 335     default:
 336       Debug( LDAP_DEBUG_ANY,"nssov: invalid request id: %d",(int)action,0,0);
 337       break;
 338   }
 339   /* we're done with the request */
 340   (void)tio_close(fp);
 341   return;
 342 }
 343
 344 /* accept a connection on the socket */
 345 static void *acceptconn(void *ctx, void *arg)
 346 {
 347         nssov_info *ni = arg;
 348         Connection conn = {0};
 349         OperationBuffer opbuf;
 350         Operation *op;
 351         int csock;
 352
 353         if ( slapd_shutdown )
 354                 return NULL;
 355
 356         {
 357                 struct sockaddr_storage addr;
 358                 socklen_t alen;
 359                 int j;
 360
 361                 /* accept a new connection */
 362                 alen=(socklen_t)sizeof(struct sockaddr_storage);
 363                 csock=accept(ni->ni_socket,(struct sockaddr *)&addr,&alen);
 364                 connection_client_enable(ni->ni_conn);
 365                 if (csock<0)
 366                 {
 367                         if ((errno==EINTR)||(errno==EAGAIN)||(errno==EWOULDBLOCK))
 368                         {
 369                                 Debug( LDAP_DEBUG_TRACE,"nssov: accept() failed (ignored): %s",strerror(errno),0,0);
 370                                 return;
 371                         }
 372                         Debug( LDAP_DEBUG_ANY,"nssov: accept() failed: %s",strerror(errno),0,0);
 373                         return;
 374                 }
 375                 /* make sure O_NONBLOCK is not inherited */
 376                 if ((j=fcntl(csock,F_GETFL,0))<0)
 377                 {
 378                         Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_GETFL) failed: %s",strerror(errno),0,0);
 379                         if (close(csock))
 380                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 381                         return;
 382                 }
 383                 if (fcntl(csock,F_SETFL,j&~O_NONBLOCK)<0)
 384                 {
 385                         Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,~O_NONBLOCK) failed: %s",strerror(errno),0,0);
 386                         if (close(csock))
 387                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 388                         return;
 389                 }
 390         }
 391         connection_fake_init( &conn, &opbuf, ctx );
 392         op=&opbuf.ob_op;
 393         conn.c_ssf = conn.c_transport_ssf = local_ssf;
 394         op->o_bd = ni->ni_db;
 395         op->o_tag = LDAP_REQ_SEARCH;
 396
 397         /* handle the connection */
 398         handleconnection(ni,csock,op);
 399 }
 400
 401 static slap_verbmasks nss_svcs[] = {
 402         { BER_BVC("aliases"), NM_alias },
 403         { BER_BVC("ethers"), NM_ether },
 404         { BER_BVC("group"), NM_group },
 405         { BER_BVC("hosts"), NM_host },
 406         { BER_BVC("netgroup"), NM_netgroup },
 407         { BER_BVC("networks"), NM_network },
 408         { BER_BVC("passwd"), NM_passwd },
 409         { BER_BVC("protocols"), NM_protocol },
 410         { BER_BVC("rpc"), NM_rpc },
 411         { BER_BVC("services"), NM_service },
 412         { BER_BVC("shadow"), NM_shadow },
 413         { BER_BVNULL, 0 }
 414 };
 415
 416 static slap_verbmasks pam_opts[] = {
 417         { BER_BVC("userhost"), NI_PAM_USERHOST },
 418         { BER_BVC("userservice"), NI_PAM_USERSVC },
 419         { BER_BVC("usergroup"), NI_PAM_USERGRP },
 420         { BER_BVC("hostservice"), NI_PAM_HOSTSVC },
 421         { BER_BVC("authz2dn"), NI_PAM_SASL2DN },
 422         { BER_BVC("uid2dn"), NI_PAM_UID2DN },
 423         { BER_BVNULL, 0 }
 424 };
 425
 426 enum {
 427         NSS_SSD=1,
 428         NSS_MAP,
 429         NSS_PAM,
 430         NSS_PAMGROUP,
 431         NSS_PAMSESS
 432 };
 433
 434 static ConfigDriver nss_cf_gen;
 435
 436 static ConfigTable nsscfg[] = {
 437         { "nssov-ssd", "service> <url", 3, 3, 0, ARG_MAGIC|NSS_SSD,
 438                 nss_cf_gen, "(OLcfgCtAt:3.1 NAME 'olcNssSsd' "
 439                         "DESC 'URL for searches in a given service' "
 440                         "EQUALITY caseIgnoreMatch "
 441                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 442         { "nssov-map", "service> <orig> <new", 4, 4, 0, ARG_MAGIC|NSS_MAP,
 443                 nss_cf_gen, "(OLcfgCtAt:3.2 NAME 'olcNssMap' "
 444                         "DESC 'Map <service> lookups of <orig> attr to <new> attr' "
 445                         "EQUALITY caseIgnoreMatch "
 446                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 447         { "nssov-pam", "options", 2, 0, 0, ARG_MAGIC|NSS_PAM,
 448                 nss_cf_gen, "(OLcfgCtAt:3.3 NAME 'olcNssPam' "
 449                         "DESC 'PAM authentication and authorization options' "
 450                         "EQUALITY caseIgnoreMatch "
 451                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 452         { "nssov-pam-defhost", "hostname", 2, 2, 0, ARG_OFFSET|ARG_BERVAL,
 453                 (void *)offsetof(struct nssov_info, ni_pam_defhost),
 454                 "(OLcfgCtAt:3.4 NAME 'olcNssPamDefHost' "
 455                         "DESC 'Default hostname for service checks' "
 456                         "EQUALITY caseIgnoreMatch "
 457                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 458         { "nssov-pam-group-dn", "DN", 2, 2, 0, ARG_MAGIC|ARG_DN|NSS_PAMGROUP,
 459                 nss_cf_gen, "(OLcfgCtAt:3.5 NAME 'olcNssPamGroupDN' "
 460                         "DESC 'DN of group in which membership is required' "
 461                         "EQUALITY distinguishedNameMatch "
 462                         "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 463         { "nssov-pam-group-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC,
 464                 (void *)offsetof(struct nssov_info, ni_pam_group_ad),
 465                 "(OLcfgCtAt:3.6 NAME 'olcNssPamGroupAD' "
 466                         "DESC 'Member attribute to use for group check' "
 467                         "EQUALITY caseIgnoreMatch "
 468                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 469         { "nssov-pam-min-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT,
 470                 (void *)offsetof(struct nssov_info, ni_pam_min_uid),
 471                 "(OLcfgCtAt:3.7 NAME 'olcNssPamMinUid' "
 472                         "DESC 'Minimum UID allowed to login' "
 473                         "EQUALITY integerMatch "
 474                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 475         { "nssov-pam-max-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT,
 476                 (void *)offsetof(struct nssov_info, ni_pam_max_uid),
 477                 "(OLcfgCtAt:3.8 NAME 'olcNssPamMaxUid' "
 478                         "DESC 'Maximum UID allowed to login' "
 479                         "EQUALITY integerMatch "
 480                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 481         { "nssov-pam-template-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC,
 482                 (void *)offsetof(struct nssov_info, ni_pam_template_ad),
 483                 "(OLcfgCtAt:3.9 NAME 'olcNssPamTemplateAD' "
 484                         "DESC 'Attribute to use for template login name' "
 485                         "EQUALITY caseIgnoreMatch "
 486                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 487         { "nssov-pam-template", "name", 2, 2, 0, ARG_OFFSET|ARG_BERVAL,
 488                 (void *)offsetof(struct nssov_info, ni_pam_template),
 489                 "(OLcfgCtAt:3.10 NAME 'olcNssPamTemplate' "
 490                         "DESC 'Default template login name' "
 491                         "EQUALITY caseIgnoreMatch "
 492                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 493         { "nssov-pam-session", "service", 2, 2, 0, ARG_MAGIC|ARG_BERVAL|NSS_PAMSESS,
 494                 nss_cf_gen, "(OLcfgCtAt:3.11 NAME 'olcNssPamSession' "
 495                         "DESC 'Services for which sessions will be recorded' "
 496                         "EQUALITY caseIgnoreMatch "
 497                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 498         { NULL, NULL, 0,0,0, ARG_IGNORED }
 499 };
 500
 501 static ConfigOCs nssocs[] = {
 502         { "( OLcfgCtOc:3.1 "
 503                 "NAME 'olcNssOvConfig' "
 504                 "DESC 'NSS lookup configuration' "
 505                 "SUP olcOverlayConfig "
 506                 "MAY ( olcNssSsd $ olcNssMap $ olcNssPam $ olcNssPamDefHost $ "
 507                         "olcNssPamGroupDN $ olcNssPamGroupAD $ "
 508                         "olcNssPamMinUid $ olcNssPamMaxUid $ olcNssPamSession $ "
 509                         "olcNssPamTemplateAD $ olcNssPamTemplate ) )",
 510                 Cft_Overlay, nsscfg },
 511         { NULL, 0, NULL }
 512 };
 513
 514 static int
 515 nss_cf_gen(ConfigArgs *c)
 516 {
 517         slap_overinst *on = (slap_overinst *)c->bi;
 518         nssov_info *ni = on->on_bi.bi_private;
 519         nssov_mapinfo *mi;
 520         int i, j, rc = 0;
 521         slap_mask_t m;
 522
 523         if ( c->op == SLAP_CONFIG_EMIT ) {
 524                 switch(c->type) {
 525                 case NSS_SSD:
 526                         rc = 1;
 527                         for (i=NM_alias;i<NM_NONE;i++) {
 528                                 struct berval scope;
 529                                 struct berval ssd;
 530                                 struct berval base;
 531
 532                                 mi = &ni->ni_maps[i];
 533
 534                                 /* ignore all-default services */
 535                                 if ( mi->mi_scope == LDAP_SCOPE_DEFAULT &&
 536                                         bvmatch( &mi->mi_filter, &mi->mi_filter0 ) &&
 537                                         BER_BVISNULL( &mi->mi_base ))
 538                                         continue;
 539
 540                                 if ( BER_BVISNULL( &mi->mi_base ))
 541                                         base = ni->ni_db->be_nsuffix[0];
 542                                 else
 543                                         base = mi->mi_base;
 544                                 ldap_pvt_scope2bv(mi->mi_scope == LDAP_SCOPE_DEFAULT ?
 545                                         LDAP_SCOPE_SUBTREE : mi->mi_scope, &scope);
 546                                 ssd.bv_len = STRLENOF(" ldap:///???") + nss_svcs[i].word.bv_len +
 547                                         base.bv_len + scope.bv_len + mi->mi_filter.bv_len;
 548                                 ssd.bv_val = ch_malloc( ssd.bv_len + 1 );
 549                                 sprintf(ssd.bv_val, "%s ldap:///%s??%s?%s", nss_svcs[i].word.bv_val,
 550                                         base.bv_val, scope.bv_val, mi->mi_filter.bv_val );
 551                                 ber_bvarray_add( &c->rvalue_vals, &ssd );
 552                                 rc = 0;
 553                         }
 554                         break;
 555                 case NSS_MAP:
 556                         rc = 1;
 557                         for (i=NM_alias;i<NM_NONE;i++) {
 558
 559                                 mi = &ni->ni_maps[i];
 560                                 for (j=0;!BER_BVISNULL(&mi->mi_attrkeys[j]);j++) {
 561                                         if ( ber_bvstrcasecmp(&mi->mi_attrkeys[j],
 562                                                 &mi->mi_attrs[j].an_name)) {
 563                                                 struct berval map;
 564
 565                                                 map.bv_len = nss_svcs[i].word.bv_len +
 566                                                         mi->mi_attrkeys[j].bv_len +
 567                                                         mi->mi_attrs[j].an_desc->ad_cname.bv_len + 2;
 568                                                 map.bv_val = ch_malloc(map.bv_len + 1);
 569                                                 sprintf(map.bv_val, "%s %s %s", nss_svcs[i].word.bv_val,
 570                                                         mi->mi_attrkeys[j].bv_val, mi->mi_attrs[j].an_desc->ad_cname.bv_val );
 571                                                 ber_bvarray_add( &c->rvalue_vals, &map );
 572                                                 rc = 0;
 573                                         }
 574                                 }
 575                         }
 576                         break;
 577                 case NSS_PAM:
 578                         rc = mask_to_verbs( pam_opts, ni->ni_pam_opts, &c->rvalue_vals );
 579                         break;
 580                 case NSS_PAMGROUP:
 581                         if (!BER_BVISEMPTY( &ni->ni_pam_group_dn )) {
 582                                 value_add_one( &c->rvalue_vals, &ni->ni_pam_group_dn );
 583                                 value_add_one( &c->rvalue_nvals, &ni->ni_pam_group_dn );
 584                         } else {
 585                                 rc = 1;
 586                         }
 587                         break;
 588                 case NSS_PAMSESS:
 589                         if (ni->ni_pam_sessions) {
 590                                 ber_bvarray_dup_x( &c->rvalue_vals, ni->ni_pam_sessions, NULL );
 591                         } else {
 592                                 rc = 1;
 593                         }
 594                         break;
 595                 }
 596                 return rc;
 597         } else if ( c->op == LDAP_MOD_DELETE ) {
 598                 /* FIXME */
 599                 return 1;
 600         }
 601         switch( c->type ) {
 602         case NSS_SSD: {
 603                 LDAPURLDesc *lud;
 604
 605                 i = verb_to_mask(c->argv[1], nss_svcs);
 606                 if ( i == NM_NONE )
 607                         return 1;
 608
 609                 mi = &ni->ni_maps[i];
 610                 rc = ldap_url_parse(c->argv[2], &lud);
 611                 if ( rc )
 612                         return 1;
 613                 do {
 614                         struct berval base;
 615                         /* Must be LDAP scheme */
 616                         if (strcasecmp(lud->lud_scheme,"ldap")) {
 617                                 rc = 1;
 618                                 break;
 619                         }
 620                         /* Host part, attrs, and extensions must be empty */
 621                         if (( lud->lud_host && *lud->lud_host ) ||
 622                                 lud->lud_attrs || lud->lud_exts ) {
 623                                 rc = 1;
 624                                 break;
 625                         }
 626                         ber_str2bv( lud->lud_dn,0,0,&base);
 627                         rc = dnNormalize( 0,NULL,NULL,&base,&mi->mi_base,NULL);
 628                         if ( rc )
 629                                 break;
 630                         if ( lud->lud_filter ) {
 631                                 /* steal this */
 632                                 ber_str2bv( lud->lud_filter,0,0,&mi->mi_filter);
 633                                 lud->lud_filter = NULL;
 634                         }
 635                         mi->mi_scope = lud->lud_scope;
 636                 } while(0);
 637                 ldap_free_urldesc( lud );
 638                 }
 639                 break;
 640         case NSS_MAP:
 641                 i = verb_to_mask(c->argv[1], nss_svcs);
 642                 if ( i == NM_NONE )
 643                         return 1;
 644                 rc = 1;
 645                 mi = &ni->ni_maps[i];
 646                 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) {
 647                         if (!strcasecmp(c->argv[2],mi->mi_attrkeys[j].bv_val)) {
 648                                 AttributeDescription *ad = NULL;
 649                                 const char *text;
 650                                 rc = slap_str2ad( c->argv[3], &ad, &text);
 651                                 if ( rc == 0 ) {
 652                                         mi->mi_attrs[j].an_desc = ad;
 653                                         mi->mi_attrs[j].an_name = ad->ad_cname;
 654                                 }
 655                                 break;
 656                         }
 657                 }
 658                 break;
 659         case NSS_PAM:
 660                 m = ni->ni_pam_opts;
 661                 i = verbs_to_mask(c->argc, c->argv, pam_opts, &m);
 662                 if (i == 0) {
 663                         ni->ni_pam_opts = m;
 664                         if ((m & NI_PAM_USERHOST) && !nssov_pam_host_ad) {
 665                                 const char *text;
 666                                 i = slap_str2ad("host", &nssov_pam_host_ad, &text);
 667                                 if (i != LDAP_SUCCESS) {
 668                                         snprintf(c->cr_msg, sizeof(c->cr_msg),
 669                                                 "nssov: host attr unknown: %s", text);
 670                                         Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0);
 671                                         rc = 1;
 672                                         break;
 673                                 }
 674                         }
 675                         if ((m & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) && !nssov_pam_svc_ad) {
 676                                 const char *text;
 677                                 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text);
 678                                 if (i != LDAP_SUCCESS) {
 679                                         snprintf(c->cr_msg, sizeof(c->cr_msg),
 680                                                 "nssov: authorizedService attr unknown: %s", text);
 681                                         Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0);
 682                                         rc = 1;
 683                                         break;
 684                                 }
 685                         }
 686                 } else {
 687                         rc = 1;
 688                 }
 689                 break;
 690         case NSS_PAMGROUP:
 691                 ni->ni_pam_group_dn = c->value_ndn;
 692                 ch_free( c->value_dn.bv_val );
 693                 break;
 694         case NSS_PAMSESS:
 695                 ber_bvarray_add( &ni->ni_pam_sessions, &c->value_bv );
 696                 break;
 697         }
 698         return rc;
 699 }
 700
 701 static int
 702 nssov_db_init(
 703         BackendDB *be,
 704         ConfigReply *cr )
 705 {
 706         slap_overinst *on = (slap_overinst *)be->bd_info;
 707         nssov_info *ni;
 708         nssov_mapinfo *mi;
 709         int rc;
 710
 711         rc = nssov_pam_init();
 712         if (rc) return rc;
 713
 714         ni = ch_calloc( 1, sizeof(nssov_info) );
 715         on->on_bi.bi_private = ni;
 716
 717         /* set up map keys */
 718         nssov_alias_init(ni);
 719         nssov_ether_init(ni);
 720         nssov_group_init(ni);
 721         nssov_host_init(ni);
 722         nssov_netgroup_init(ni);
 723         nssov_network_init(ni);
 724         nssov_passwd_init(ni);
 725         nssov_protocol_init(ni);
 726         nssov_rpc_init(ni);
 727         nssov_service_init(ni);
 728         nssov_shadow_init(ni);
 729
 730         ni->ni_db = be->bd_self;
 731         ni->ni_pam_opts = NI_PAM_UID2DN;
 732
 733         return 0;
 734 }
 735
 736 static int
 737 nssov_db_destroy(
 738         BackendDB *be,
 739         ConfigReply *cr )
 740 {
 741 }
 742
 743 static int
 744 nssov_db_open(
 745         BackendDB *be,
 746         ConfigReply *cr )
 747 {
 748         slap_overinst *on = (slap_overinst *)be->bd_info;
 749         nssov_info *ni = on->on_bi.bi_private;
 750         nssov_mapinfo *mi;
 751
 752         int i, sock;
 753         struct sockaddr_un addr;
 754
 755         /* Set default bases */
 756         for (i=0; i<NM_NONE; i++) {
 757                 if ( BER_BVISNULL( &ni->ni_maps[i].mi_base )) {
 758                         ber_dupbv( &ni->ni_maps[i].mi_base, &be->be_nsuffix[0] );
 759                 }
 760                 if ( ni->ni_maps[i].mi_scope == LDAP_SCOPE_DEFAULT )
 761                         ni->ni_maps[i].mi_scope = LDAP_SCOPE_SUBTREE;
 762         }
 763         /* validate attribute maps */
 764         mi = ni->ni_maps;
 765         for ( i=0; i<NM_NONE; i++,mi++) {
 766                 const char *text;
 767                 int j;
 768                 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) {
 769                         /* skip attrs we already validated */
 770                         if ( mi->mi_attrs[j].an_desc ) continue;
 771                         if ( slap_bv2ad( &mi->mi_attrs[j].an_name,
 772                                 &mi->mi_attrs[j].an_desc, &text )) {
 773                                 Debug(LDAP_DEBUG_ANY,"nssov: invalid attr \"%s\": %s\n",
 774                                         mi->mi_attrs[j].an_name.bv_val, text, 0 );
 775                                 return -1;
 776                         }
 777                 }
 778                 BER_BVZERO(&mi->mi_attrs[j].an_name);
 779                 mi->mi_attrs[j].an_desc = NULL;
 780         }
 781
 782         /* Find host and authorizedService definitions */
 783         if ((ni->ni_pam_opts & NI_PAM_USERHOST) && !nssov_pam_host_ad)
 784         {
 785                 const char *text;
 786                 i = slap_str2ad("host", &nssov_pam_host_ad, &text);
 787                 if (i != LDAP_SUCCESS) {
 788                         Debug(LDAP_DEBUG_ANY,"nssov: host attr unknown: %s\n",
 789                                 text, 0, 0 );
 790                         return -1;
 791                 }
 792         }
 793         if ((ni->ni_pam_opts & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) &&
 794                 !nssov_pam_svc_ad)
 795         {
 796                 const char *text;
 797                 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text);
 798                 if (i != LDAP_SUCCESS) {
 799                         Debug(LDAP_DEBUG_ANY,"nssov: authorizedService attr unknown: %s\n",
 800                                 text, 0, 0 );
 801                         return -1;
 802                 }
 803         }
 804         if ( slapMode & SLAP_SERVER_MODE ) {
 805                 /* make sure /var/run/nslcd exists */
 806                 if (mkdir(NSLCD_PATH, (mode_t) 0555)) {
 807                         Debug(LDAP_DEBUG_TRACE,"nssov: mkdir(%s) failed (ignored): %s\n",
 808                                         NSLCD_PATH,strerror(errno),0);
 809                 } else {
 810                         Debug(LDAP_DEBUG_TRACE,"nssov: created %s\n",NSLCD_PATH,0,0);
 811                 }
 812
 813                 /* create a socket */
 814                 if ( (sock=socket(PF_UNIX,SOCK_STREAM,0))<0 )
 815                 {
 816                         Debug(LDAP_DEBUG_ANY,"nssov: cannot create socket: %s\n",strerror(errno),0,0);
 817                         return -1;
 818                 }
 819                 /* remove existing named socket */
 820                 if (unlink(NSLCD_SOCKET)<0)
 821                 {
 822                         Debug( LDAP_DEBUG_TRACE,"nssov: unlink() of "NSLCD_SOCKET" failed (ignored): %s\n",
 823                                                         strerror(errno),0,0);
 824                 }
 825                 /* create socket address structure */
 826                 memset(&addr,0,sizeof(struct sockaddr_un));
 827                 addr.sun_family=AF_UNIX;
 828                 strncpy(addr.sun_path,NSLCD_SOCKET,sizeof(addr.sun_path));
 829                 addr.sun_path[sizeof(addr.sun_path)-1]='\0';
 830                 /* bind to the named socket */
 831                 if (bind(sock,(struct sockaddr *)&addr,sizeof(struct sockaddr_un)))
 832                 {
 833                         Debug( LDAP_DEBUG_ANY,"nssov: bind() to "NSLCD_SOCKET" failed: %s",
 834                                                         strerror(errno),0,0);
 835                         if (close(sock))
 836                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 837                         return -1;
 838                 }
 839                 /* close the file descriptor on exit */
 840                 if (fcntl(sock,F_SETFD,FD_CLOEXEC)<0)
 841                 {
 842                         Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,O_NONBLOCK) failed: %s",strerror(errno),0,0);
 843                         if (close(sock))
 844                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 845                         return -1;
 846                 }
 847                 /* set permissions of socket so anybody can do requests */
 848                 /* Note: we use chmod() here instead of fchmod() because
 849                          fchmod does not work on sockets
 850                          http://www.opengroup.org/onlinepubs/009695399/functions/fchmod.html
 851                          http://lkml.org/lkml/2005/5/16/11 */
 852                 if (chmod(NSLCD_SOCKET,(mode_t)0666))
 853                 {
 854                         Debug( LDAP_DEBUG_ANY,"nssov: chmod(0666) failed: %s",strerror(errno),0,0);
 855                         if (close(sock))
 856                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 857                         return -1;
 858                 }
 859                 /* start listening for connections */
 860                 if (listen(sock,SOMAXCONN)<0)
 861                 {
 862                         Debug( LDAP_DEBUG_ANY,"nssov: listen() failed: %s",strerror(errno),0,0);
 863                         if (close(sock))
 864                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 865                         return -1;
 866                 }
 867                 ni->ni_socket = sock;
 868                 ni->ni_conn = connection_client_setup( sock, acceptconn, ni );
 869         }
 870
 871         return 0;
 872 }
 873
 874 static int
 875 nssov_db_close(
 876         BackendDB *be,
 877         ConfigReply *cr )
 878 {
 879         slap_overinst *on = (slap_overinst *)be->bd_info;
 880         nssov_info *ni = on->on_bi.bi_private;
 881
 882         /* close socket if it's still in use */
 883         if (ni->ni_socket >= 0);
 884         {
 885                 if (close(ni->ni_socket))
 886                         Debug( LDAP_DEBUG_ANY,"problem closing server socket (ignored): %s",strerror(errno),0,0);
 887                 ni->ni_socket = -1;
 888         }
 889         /* remove existing named socket */
 890         if (unlink(NSLCD_SOCKET)<0)
 891         {
 892                 Debug( LDAP_DEBUG_TRACE,"unlink() of "NSLCD_SOCKET" failed (ignored): %s",
 893                         strerror(errno),0,0);
 894         }
 895 }
 896
 897 static slap_overinst nssov;
 898
 899 int
 900 nssov_initialize( void )
 901 {
 902         int rc;
 903
 904         nssov.on_bi.bi_type = "nssov";
 905         nssov.on_bi.bi_db_init = nssov_db_init;
 906         nssov.on_bi.bi_db_destroy = nssov_db_destroy;
 907         nssov.on_bi.bi_db_open = nssov_db_open;
 908         nssov.on_bi.bi_db_close = nssov_db_close;
 909
 910         nssov.on_bi.bi_cf_ocs = nssocs;
 911
 912         rc = config_register_schema( nsscfg, nssocs );
 913         if ( rc ) return rc;
 914
 915         return overlay_register(&nssov);
 916 }
 917
 918 #if SLAPD_OVER_NSSOV == SLAPD_MOD_DYNAMIC
 919 int
 920 init_module( int argc, char *argv[] )
 921 {
 922         return nssov_initialize();
 923 }
 924 #endif