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

   1 /* nssov.c - nss-ldap overlay for slapd */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 2008-2009 by Howard Chu, Symas Corp.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /*
  16  * This code references portions of the nss-ldapd package
  17  * written by Arthur de Jong. The nss-ldapd code was forked
  18  * from the nss-ldap library written by Luke Howard.
  19  */
  20
  21 #include "nssov.h"
  22
  23 #ifndef SLAPD_OVER_NSSOV
  24 #define SLAPD_OVER_NSSOV SLAPD_MOD_DYNAMIC
  25 #endif
  26
  27 #include "../slapd/config.h"    /* not nss-ldapd config.h */
  28
  29 #include "lutil.h"
  30
  31 #include <ac/errno.h>
  32 #include <ac/unistd.h>
  33 #include <fcntl.h>
  34 #include <sys/stat.h>
  35
  36 AttributeDescription *nssov_pam_host_ad;
  37 AttributeDescription *nssov_pam_svc_ad;
  38
  39 /* buffer sizes for I/O */
  40 #define READBUFFER_MINSIZE 32
  41 #define READBUFFER_MAXSIZE 64
  42 #define WRITEBUFFER_MINSIZE 64
  43 #define WRITEBUFFER_MAXSIZE 64*1024
  44
  45 /* Find the given attribute's value in the RDN of the DN */
  46 int nssov_find_rdnval(struct berval *dn, AttributeDescription *ad, struct berval *value)
  47 {
  48         struct berval rdn;
  49         char *next;
  50
  51         BER_BVZERO(value);
  52         dnRdn( dn, &rdn );
  53         do {
  54                 next = ber_bvchr( &rdn, '+' );
  55                 if ( rdn.bv_val[ad->ad_cname.bv_len] == '=' &&
  56                         !ber_bvcmp( &rdn, &ad->ad_cname )) {
  57                         if ( next )
  58                                 rdn.bv_len = next - rdn.bv_val;
  59                         value->bv_val = rdn.bv_val + ad->ad_cname.bv_len + 1;
  60                         value->bv_len = rdn.bv_len - ad->ad_cname.bv_len - 1;
  61                         break;
  62                 }
  63                 if ( !next )
  64                         break;
  65                 next++;
  66                 rdn.bv_len -= next - rdn.bv_val;
  67                 rdn.bv_val = next;
  68         } while (1);
  69 }
  70
  71 /* create a search filter using a name that requires escaping */
  72 int nssov_filter_byname(nssov_mapinfo *mi,int key,struct berval *name,struct berval *buf)
  73 {
  74         char buf2[1024];
  75         struct berval bv2 = {sizeof(buf2),buf2};
  76
  77         /* escape attribute */
  78         if (nssov_escape(name,&bv2))
  79                 return -1;
  80         /* build filter */
  81         if (bv2.bv_len + mi->mi_filter.bv_len + mi->mi_attrs[key].an_desc->ad_cname.bv_len + 6 >
  82                 buf->bv_len )
  83                 return -1;
  84         buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))",
  85                 mi->mi_filter.bv_val, mi->mi_attrs[key].an_desc->ad_cname.bv_val,
  86                 bv2.bv_val );
  87         return 0;
  88 }
  89
  90 /* create a search filter using a string converted from an int */
  91 int nssov_filter_byid(nssov_mapinfo *mi,int key,struct berval *id,struct berval *buf)
  92 {
  93         /* build filter */
  94         if (id->bv_len + mi->mi_filter.bv_len + mi->mi_attrs[key].an_desc->ad_cname.bv_len + 6 >
  95                 buf->bv_len )
  96                 return -1;
  97         buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))",
  98                 mi->mi_filter.bv_val, mi->mi_attrs[key].an_desc->ad_cname.bv_val,
  99                 id->bv_val );
 100         return 0;
 101 }
 102
 103 void get_userpassword(struct berval *attr,struct berval *pw)
 104 {
 105         int i;
 106         /* go over the entries and return the remainder of the value if it
 107                  starts with {crypt} or crypt$ */
 108         for (i=0;!BER_BVISNULL(&attr[i]);i++)
 109         {
 110                 if (strncasecmp(attr[i].bv_val,"{crypt}",7)==0) {
 111                         pw->bv_val = attr[i].bv_val + 7;
 112                         pw->bv_len = attr[i].bv_len - 7;
 113                         return;
 114                 }
 115                 if (strncasecmp(attr[i].bv_val,"crypt$",6)==0) {
 116                         pw->bv_val = attr[i].bv_val + 6;
 117                         pw->bv_len = attr[i].bv_len - 6;
 118                         return;
 119                 }
 120         }
 121         /* just return the first value completely */
 122         *pw = *attr;
 123         /* TODO: support more password formats e.g. SMD5
 124                 (which is $1$ but in a different format)
 125                 (any code for this is more than welcome) */
 126 }
 127
 128 /* this writes a single address to the stream */
 129 int write_address(TFILE *fp,struct berval *addr)
 130 {
 131         int32_t tmpint32;
 132         struct in_addr ipv4addr;
 133         struct in6_addr ipv6addr;
 134         /* try to parse the address as IPv4 first, fall back to IPv6 */
 135         if (inet_pton(AF_INET,addr->bv_val,&ipv4addr)>0)
 136         {
 137                 /* write address type */
 138                 WRITE_INT32(fp,AF_INET);
 139                 /* write the address length */
 140                 WRITE_INT32(fp,sizeof(struct in_addr));
 141                 /* write the address itself (in network byte order) */
 142                 WRITE_TYPE(fp,ipv4addr,struct in_addr);
 143         }
 144         else if (inet_pton(AF_INET6,addr->bv_val,&ipv6addr)>0)
 145         {
 146                 /* write address type */
 147                 WRITE_INT32(fp,AF_INET6);
 148                 /* write the address length */
 149                 WRITE_INT32(fp,sizeof(struct in6_addr));
 150                 /* write the address itself (in network byte order) */
 151                 WRITE_TYPE(fp,ipv6addr,struct in6_addr);
 152         }
 153         else
 154         {
 155                 /* failure, log but write simple invalid address
 156                          (otherwise the address list is messed up) */
 157                 /* TODO: have error message in correct format */
 158                 Debug(LDAP_DEBUG_ANY,"nssov: unparseable address: %s\n",addr->bv_val,0,0);
 159                 /* write an illegal address type */
 160                 WRITE_INT32(fp,-1);
 161                 /* write an empty address */
 162                 WRITE_INT32(fp,0);
 163         }
 164         /* we're done */
 165         return 0;
 166 }
 167
 168 int read_address(TFILE *fp,char *addr,int *addrlen,int *af)
 169 {
 170         int32_t tmpint32;
 171         int len;
 172         /* read address family */
 173         READ_INT32(fp,*af);
 174         if ((*af!=AF_INET)&&(*af!=AF_INET6))
 175         {
 176                 Debug(LDAP_DEBUG_ANY,"nssov: incorrect address family specified: %d\n",*af,0,0);
 177                 return -1;
 178         }
 179         /* read address length */
 180         READ_INT32(fp,len);
 181         if ((len>*addrlen)||(len<=0))
 182         {
 183                 Debug(LDAP_DEBUG_ANY,"nssov: address length incorrect: %d\n",len,0,0);
 184                 return -1;
 185         }
 186         *addrlen=len;
 187         /* read address */
 188         READ(fp,addr,len);
 189         /* we're done */
 190         return 0;
 191 }
 192
 193 int nssov_escape(struct berval *src,struct berval *dst)
 194 {
 195         size_t pos=0;
 196         int i;
 197         /* go over all characters in source string */
 198         for (i=0;i<src->bv_len;i++)
 199         {
 200                 /* check if char will fit */
 201                 if (pos>=(dst->bv_len-4))
 202                         return -1;
 203                 /* do escaping for some characters */
 204                 switch (src->bv_val[i])
 205                 {
 206                         case '*':
 207                                 strcpy(dst->bv_val+pos,"\\2a");
 208                                 pos+=3;
 209                                 break;
 210                         case '(':
 211                                 strcpy(dst->bv_val+pos,"\\28");
 212                                 pos+=3;
 213                                 break;
 214                         case ')':
 215                                 strcpy(dst->bv_val+pos,"\\29");
 216                                 pos+=3;
 217                                 break;
 218                         case '\\':
 219                                 strcpy(dst->bv_val+pos,"\\5c");
 220                                 pos+=3;
 221                                 break;
 222                         default:
 223                                 /* just copy character */
 224                                 dst->bv_val[pos++]=src->bv_val[i];
 225                                 break;
 226                 }
 227         }
 228         /* terminate destination string */
 229         dst->bv_val[pos]='\0';
 230         dst->bv_len = pos;
 231         return 0;
 232 }
 233
 234 /* read the version information and action from the stream
 235    this function returns the read action in location pointer to by action */
 236 static int read_header(TFILE *fp,int32_t *action)
 237 {
 238   int32_t tmpint32;
 239   /* read the protocol version */
 240   READ_TYPE(fp,tmpint32,int32_t);
 241   if (tmpint32 != (int32_t)NSLCD_VERSION)
 242   {
 243     Debug( LDAP_DEBUG_TRACE,"nssov: wrong nslcd version id (%d)\n",(int)tmpint32,0,0);
 244     return -1;
 245   }
 246   /* read the request type */
 247   READ(fp,action,sizeof(int32_t));
 248   return 0;
 249 }
 250
 251 /* read a request message, returns <0 in case of errors,
 252    this function closes the socket */
 253 static void handleconnection(nssov_info *ni,int sock,Operation *op)
 254 {
 255   TFILE *fp;
 256   int32_t action;
 257   struct timeval readtimeout,writetimeout;
 258   uid_t uid;
 259   gid_t gid;
 260   char authid[sizeof("gidNumber=4294967295+uidNumber=424967295,cn=peercred,cn=external,cn=auth")];
 261
 262   /* log connection */
 263   if (lutil_getpeereid(sock,&uid,&gid))
 264     Debug( LDAP_DEBUG_TRACE,"nssov: connection from unknown client: %s\n",strerror(errno),0,0);
 265   else
 266     Debug( LDAP_DEBUG_TRACE,"nssov: connection from uid=%d gid=%d\n",
 267                       (int)uid,(int)gid,0);
 268
 269   /* Should do authid mapping too */
 270   op->o_dn.bv_len = sprintf(authid,"gidNumber=%d+uidNumber=%d,cn=peercred,cn=external,cn=auth",
 271         (int)uid, (int)gid );
 272   op->o_dn.bv_val = authid;
 273   op->o_ndn = op->o_dn;
 274
 275   /* set the timeouts */
 276   readtimeout.tv_sec=0; /* clients should send their request quickly */
 277   readtimeout.tv_usec=500000;
 278   writetimeout.tv_sec=5; /* clients could be taking some time to process the results */
 279   writetimeout.tv_usec=0;
 280   /* create a stream object */
 281   if ((fp=tio_fdopen(sock,&readtimeout,&writetimeout,
 282                      READBUFFER_MINSIZE,READBUFFER_MAXSIZE,
 283                      WRITEBUFFER_MINSIZE,WRITEBUFFER_MAXSIZE))==NULL)
 284   {
 285     Debug( LDAP_DEBUG_ANY,"nssov: cannot create stream for writing: %s",strerror(errno),0,0);
 286     (void)close(sock);
 287     return;
 288   }
 289   /* read request */
 290   if (read_header(fp,&action))
 291   {
 292     (void)tio_close(fp);
 293     return;
 294   }
 295   /* handle request */
 296   switch (action)
 297   {
 298     case NSLCD_ACTION_ALIAS_BYNAME:     (void)nssov_alias_byname(ni,fp,op); break;
 299     case NSLCD_ACTION_ALIAS_ALL:        (void)nssov_alias_all(ni,fp,op); break;
 300     case NSLCD_ACTION_ETHER_BYNAME:     (void)nssov_ether_byname(ni,fp,op); break;
 301     case NSLCD_ACTION_ETHER_BYETHER:    (void)nssov_ether_byether(ni,fp,op); break;
 302     case NSLCD_ACTION_ETHER_ALL:        (void)nssov_ether_all(ni,fp,op); break;
 303     case NSLCD_ACTION_GROUP_BYNAME:     (void)nssov_group_byname(ni,fp,op); break;
 304     case NSLCD_ACTION_GROUP_BYGID:      (void)nssov_group_bygid(ni,fp,op); break;
 305     case NSLCD_ACTION_GROUP_BYMEMBER:   (void)nssov_group_bymember(ni,fp,op); break;
 306     case NSLCD_ACTION_GROUP_ALL:        (void)nssov_group_all(ni,fp,op); break;
 307     case NSLCD_ACTION_HOST_BYNAME:      (void)nssov_host_byname(ni,fp,op); break;
 308     case NSLCD_ACTION_HOST_BYADDR:      (void)nssov_host_byaddr(ni,fp,op); break;
 309     case NSLCD_ACTION_HOST_ALL:         (void)nssov_host_all(ni,fp,op); break;
 310     case NSLCD_ACTION_NETGROUP_BYNAME:  (void)nssov_netgroup_byname(ni,fp,op); break;
 311     case NSLCD_ACTION_NETWORK_BYNAME:   (void)nssov_network_byname(ni,fp,op); break;
 312     case NSLCD_ACTION_NETWORK_BYADDR:   (void)nssov_network_byaddr(ni,fp,op); break;
 313     case NSLCD_ACTION_NETWORK_ALL:      (void)nssov_network_all(ni,fp,op); break;
 314     case NSLCD_ACTION_PASSWD_BYNAME:    (void)nssov_passwd_byname(ni,fp,op); break;
 315     case NSLCD_ACTION_PASSWD_BYUID:     (void)nssov_passwd_byuid(ni,fp,op); break;
 316     case NSLCD_ACTION_PASSWD_ALL:       (void)nssov_passwd_all(ni,fp,op); break;
 317     case NSLCD_ACTION_PROTOCOL_BYNAME:  (void)nssov_protocol_byname(ni,fp,op); break;
 318     case NSLCD_ACTION_PROTOCOL_BYNUMBER:(void)nssov_protocol_bynumber(ni,fp,op); break;
 319     case NSLCD_ACTION_PROTOCOL_ALL:     (void)nssov_protocol_all(ni,fp,op); break;
 320     case NSLCD_ACTION_RPC_BYNAME:       (void)nssov_rpc_byname(ni,fp,op); break;
 321     case NSLCD_ACTION_RPC_BYNUMBER:     (void)nssov_rpc_bynumber(ni,fp,op); break;
 322     case NSLCD_ACTION_RPC_ALL:          (void)nssov_rpc_all(ni,fp,op); break;
 323     case NSLCD_ACTION_SERVICE_BYNAME:   (void)nssov_service_byname(ni,fp,op); break;
 324     case NSLCD_ACTION_SERVICE_BYNUMBER: (void)nssov_service_bynumber(ni,fp,op); break;
 325     case NSLCD_ACTION_SERVICE_ALL:      (void)nssov_service_all(ni,fp,op); break;
 326     case NSLCD_ACTION_SHADOW_BYNAME:    if (uid==0) (void)nssov_shadow_byname(ni,fp,op); break;
 327     case NSLCD_ACTION_SHADOW_ALL:       if (uid==0) (void)nssov_shadow_all(ni,fp,op); break;
 328         case NSLCD_ACTION_PAM_AUTHC:            (void)pam_authc(ni,fp,op); break;
 329         case NSLCD_ACTION_PAM_AUTHZ:            (void)pam_authz(ni,fp,op); break;
 330         case NSLCD_ACTION_PAM_SESS_O:           if (uid==0) (void)pam_sess_o(ni,fp,op); break;
 331         case NSLCD_ACTION_PAM_SESS_C:           if (uid==0) (void)pam_sess_c(ni,fp,op); break;
 332         case NSLCD_ACTION_PAM_PWMOD:            (void)pam_pwmod(ni,fp,op); break;
 333     default:
 334       Debug( LDAP_DEBUG_ANY,"nssov: invalid request id: %d",(int)action,0,0);
 335       break;
 336   }
 337   /* we're done with the request */
 338   (void)tio_close(fp);
 339   return;
 340 }
 341
 342 /* accept a connection on the socket */
 343 static void *acceptconn(void *ctx, void *arg)
 344 {
 345         nssov_info *ni = arg;
 346         Connection conn = {0};
 347         OperationBuffer opbuf;
 348         Operation *op;
 349         int csock;
 350
 351         if ( slapd_shutdown )
 352                 return NULL;
 353
 354         {
 355                 struct sockaddr_storage addr;
 356                 socklen_t alen;
 357                 int j;
 358
 359                 /* accept a new connection */
 360                 alen=(socklen_t)sizeof(struct sockaddr_storage);
 361                 csock=accept(ni->ni_socket,(struct sockaddr *)&addr,&alen);
 362                 connection_client_enable(ni->ni_conn);
 363                 if (csock<0)
 364                 {
 365                         if ((errno==EINTR)||(errno==EAGAIN)||(errno==EWOULDBLOCK))
 366                         {
 367                                 Debug( LDAP_DEBUG_TRACE,"nssov: accept() failed (ignored): %s",strerror(errno),0,0);
 368                                 return;
 369                         }
 370                         Debug( LDAP_DEBUG_ANY,"nssov: accept() failed: %s",strerror(errno),0,0);
 371                         return;
 372                 }
 373                 /* make sure O_NONBLOCK is not inherited */
 374                 if ((j=fcntl(csock,F_GETFL,0))<0)
 375                 {
 376                         Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_GETFL) failed: %s",strerror(errno),0,0);
 377                         if (close(csock))
 378                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 379                         return;
 380                 }
 381                 if (fcntl(csock,F_SETFL,j&~O_NONBLOCK)<0)
 382                 {
 383                         Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,~O_NONBLOCK) failed: %s",strerror(errno),0,0);
 384                         if (close(csock))
 385                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 386                         return;
 387                 }
 388         }
 389         connection_fake_init( &conn, &opbuf, ctx );
 390         op=&opbuf.ob_op;
 391         conn.c_ssf = conn.c_transport_ssf = local_ssf;
 392         op->o_bd = ni->ni_db;
 393         op->o_tag = LDAP_REQ_SEARCH;
 394
 395         /* handle the connection */
 396         handleconnection(ni,csock,op);
 397 }
 398
 399 static slap_verbmasks nss_svcs[] = {
 400         { BER_BVC("alias"), NM_alias },
 401         { BER_BVC("ether"), NM_ether },
 402         { BER_BVC("group"), NM_group },
 403         { BER_BVC("host"), NM_host },
 404         { BER_BVC("netgroup"), NM_netgroup },
 405         { BER_BVC("network"), NM_network },
 406         { BER_BVC("passwd"), NM_passwd },
 407         { BER_BVC("protocol"), NM_protocol },
 408         { BER_BVC("rpc"), NM_rpc },
 409         { BER_BVC("service"), NM_service },
 410         { BER_BVC("shadow"), NM_shadow },
 411         { BER_BVNULL, 0 }
 412 };
 413
 414 static slap_verbmasks pam_opts[] = {
 415         { BER_BVC("userhost"), NI_PAM_USERHOST },
 416         { BER_BVC("userservice"), NI_PAM_USERSVC },
 417         { BER_BVC("usergroup"), NI_PAM_USERGRP },
 418         { BER_BVC("hostservice"), NI_PAM_HOSTSVC },
 419         { BER_BVC("sasl2dn"), NI_PAM_SASL2DN },
 420         { BER_BVC("uid2dn"), NI_PAM_UID2DN },
 421         { BER_BVNULL, 0 }
 422 };
 423
 424 enum {
 425         NSS_SSD=1,
 426         NSS_MAP,
 427         NSS_PAM,
 428         NSS_PAMGROUP,
 429 };
 430
 431 static ConfigDriver nss_cf_gen;
 432
 433 static ConfigTable nsscfg[] = {
 434         { "nssov-ssd", "service> <url", 3, 3, 0, ARG_MAGIC|NSS_SSD,
 435                 nss_cf_gen, "(OLcfgCtAt:3.1 NAME 'olcNssSsd' "
 436                         "DESC 'URL for searches in a given service' "
 437                         "EQUALITY caseIgnoreMatch "
 438                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 439         { "nssov-map", "service> <orig> <new", 4, 4, 0, ARG_MAGIC|NSS_MAP,
 440                 nss_cf_gen, "(OLcfgCtAt:3.2 NAME 'olcNssMap' "
 441                         "DESC 'Map <service> lookups of <orig> attr to <new> attr' "
 442                         "EQUALITY caseIgnoreMatch "
 443                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 444         { "nssov-pam", "options", 2, 0, 0, ARG_MAGIC|NSS_PAM,
 445                 nss_cf_gen, "(OLcfgCtAt:3.3 NAME 'olcNssPam' "
 446                         "DESC 'PAM authentication and authorization options' "
 447                         "EQUALITY caseIgnoreMatch "
 448                         "SYNTAX OMsDirectoryString )", NULL, NULL },
 449         { "nssov-pam-defhost", "hostname", 2, 2, 0, ARG_OFFSET|ARG_BERVAL,
 450                 (void *)offsetof(struct nssov_info, ni_pam_defhost),
 451                 "(OLcfgCtAt:3.4 NAME 'olcNssPamDefHost' "
 452                         "DESC 'Default hostname for service checks' "
 453                         "EQUALITY caseIgnoreMatch "
 454                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 455         { "nssov-pam-group-dn", "DN", 2, 2, 0, ARG_MAGIC|ARG_DN|NSS_PAMGROUP,
 456                 nss_cf_gen, "(OLcfgCtAt:3.5 NAME 'olcNssPamGroupDN' "
 457                         "DESC 'DN of group in which membership is required' "
 458                         "EQUALITY distinguishedNameMatch "
 459                         "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 460         { "nssov-pam-group-ad", "options", 2, 2, 0, ARG_OFFSET|ARG_ATDESC,
 461                 (void *)offsetof(struct nssov_info, ni_pam_group_ad),
 462                 "(OLcfgCtAt:3.6 NAME 'olcNssPamGroupAD' "
 463                         "DESC 'Member attribute to use for group check' "
 464                         "EQUALITY caseIgnoreMatch "
 465                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 466         { "nssov-pam-min-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT,
 467                 (void *)offsetof(struct nssov_info, ni_pam_min_uid),
 468                 "(OLcfgCtAt:3.7 NAME 'olcNssPamMinUid' "
 469                         "DESC 'Minimum UID allowed to login' "
 470                         "EQUALITY integerMatch "
 471                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 472         { "nssov-pam-max-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT,
 473                 (void *)offsetof(struct nssov_info, ni_pam_max_uid),
 474                 "(OLcfgCtAt:3.8 NAME 'olcNssPamMaxUid' "
 475                         "DESC 'Maximum UID allowed to login' "
 476                         "EQUALITY integerMatch "
 477                         "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 478         { "nssov-pam-template-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC,
 479                 (void *)offsetof(struct nssov_info, ni_pam_template_ad),
 480                 "(OLcfgCtAt:3.9 NAME 'olcNssPamTemplateAD' "
 481                         "DESC 'Attribute to use for template login name' "
 482                         "EQUALITY caseIgnoreMatch "
 483                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 484         { "nssov-pam-template", "name", 2, 2, 0, ARG_OFFSET|ARG_BERVAL,
 485                 (void *)offsetof(struct nssov_info, ni_pam_template),
 486                 "(OLcfgCtAt:3.10 NAME 'olcNssPamTemplate' "
 487                         "DESC 'Default template login name' "
 488                         "EQUALITY caseIgnoreMatch "
 489                         "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
 490         { NULL, NULL, 0,0,0, ARG_IGNORED }
 491 };
 492
 493 static ConfigOCs nssocs[] = {
 494         { "( OLcfgCtOc:3.1 "
 495                 "NAME 'olcNssOvConfig' "
 496                 "DESC 'NSS lookup configuration' "
 497                 "SUP olcOverlayConfig "
 498                 "MAY ( olcNssSsd $ olcNssMap $ olcNssPam $ olcNssPamDefHost $ "
 499                         "olcNssPamGroupDN $ olcNssPamGroupAD $ "
 500                         "olcNssPamMinUid $ olcNssPamMaxUid $ "
 501                         "olcNssPamTemplateAD $ olcNssPamTemplate ) )",
 502                 Cft_Overlay, nsscfg },
 503         { NULL, 0, NULL }
 504 };
 505
 506 static int
 507 nss_cf_gen(ConfigArgs *c)
 508 {
 509         slap_overinst *on = (slap_overinst *)c->bi;
 510         nssov_info *ni = on->on_bi.bi_private;
 511         nssov_mapinfo *mi;
 512         int i, j, rc = 0;
 513         slap_mask_t m;
 514
 515         if ( c->op == SLAP_CONFIG_EMIT ) {
 516                 switch(c->type) {
 517                 case NSS_SSD:
 518                         rc = 1;
 519                         for (i=NM_alias;i<NM_NONE;i++) {
 520                                 struct berval scope;
 521                                 struct berval ssd;
 522                                 struct berval base;
 523
 524                                 mi = &ni->ni_maps[i];
 525
 526                                 /* ignore all-default services */
 527                                 if ( mi->mi_scope == LDAP_SCOPE_DEFAULT &&
 528                                         bvmatch( &mi->mi_filter, &mi->mi_filter0 ) &&
 529                                         BER_BVISNULL( &mi->mi_base ))
 530                                         continue;
 531
 532                                 if ( BER_BVISNULL( &mi->mi_base ))
 533                                         base = ni->ni_db->be_nsuffix[0];
 534                                 else
 535                                         base = mi->mi_base;
 536                                 ldap_pvt_scope2bv(mi->mi_scope == LDAP_SCOPE_DEFAULT ?
 537                                         LDAP_SCOPE_SUBTREE : mi->mi_scope, &scope);
 538                                 ssd.bv_len = STRLENOF(" ldap:///???") + nss_svcs[i].word.bv_len +
 539                                         base.bv_len + scope.bv_len + mi->mi_filter.bv_len;
 540                                 ssd.bv_val = ch_malloc( ssd.bv_len + 1 );
 541                                 sprintf(ssd.bv_val, "%s ldap:///%s??%s?%s", nss_svcs[i].word.bv_val,
 542                                         base.bv_val, scope.bv_val, mi->mi_filter.bv_val );
 543                                 ber_bvarray_add( &c->rvalue_vals, &ssd );
 544                                 rc = 0;
 545                         }
 546                         break;
 547                 case NSS_MAP:
 548                         rc = 1;
 549                         for (i=NM_alias;i<NM_NONE;i++) {
 550
 551                                 mi = &ni->ni_maps[i];
 552                                 for (j=0;!BER_BVISNULL(&mi->mi_attrkeys[j]);j++) {
 553                                         if ( ber_bvstrcasecmp(&mi->mi_attrkeys[j],
 554                                                 &mi->mi_attrs[j].an_name)) {
 555                                                 struct berval map;
 556
 557                                                 map.bv_len = nss_svcs[i].word.bv_len +
 558                                                         mi->mi_attrkeys[j].bv_len +
 559                                                         mi->mi_attrs[j].an_desc->ad_cname.bv_len + 2;
 560                                                 map.bv_val = ch_malloc(map.bv_len + 1);
 561                                                 sprintf(map.bv_val, "%s %s %s", nss_svcs[i].word.bv_val,
 562                                                         mi->mi_attrkeys[j].bv_val, mi->mi_attrs[j].an_desc->ad_cname.bv_val );
 563                                                 ber_bvarray_add( &c->rvalue_vals, &map );
 564                                                 rc = 0;
 565                                         }
 566                                 }
 567                         }
 568                         break;
 569                 case NSS_PAM:
 570                         rc = mask_to_verbs( pam_opts, ni->ni_pam_opts, &c->rvalue_vals );
 571                         break;
 572                 case NSS_PAMGROUP:
 573                         if (!BER_BVISEMPTY( &ni->ni_pam_group_dn )) {
 574                                 value_add_one( &c->rvalue_vals, &ni->ni_pam_group_dn );
 575                                 value_add_one( &c->rvalue_nvals, &ni->ni_pam_group_dn );
 576                         } else {
 577                                 rc = 1;
 578                         }
 579                         break;
 580                 }
 581                 return rc;
 582         } else if ( c->op == LDAP_MOD_DELETE ) {
 583                 /* FIXME */
 584                 return 1;
 585         }
 586         switch( c->type ) {
 587         case NSS_SSD: {
 588                 LDAPURLDesc *lud;
 589
 590                 i = verb_to_mask(c->argv[1], nss_svcs);
 591                 if ( i == NM_NONE )
 592                         return 1;
 593
 594                 mi = &ni->ni_maps[i];
 595                 rc = ldap_url_parse(c->argv[2], &lud);
 596                 if ( rc )
 597                         return 1;
 598                 do {
 599                         struct berval base;
 600                         /* Must be LDAP scheme */
 601                         if (strcasecmp(lud->lud_scheme,"ldap")) {
 602                                 rc = 1;
 603                                 break;
 604                         }
 605                         /* Host part, attrs, and extensions must be empty */
 606                         if (( lud->lud_host && *lud->lud_host ) ||
 607                                 lud->lud_attrs || lud->lud_exts ) {
 608                                 rc = 1;
 609                                 break;
 610                         }
 611                         ber_str2bv( lud->lud_dn,0,0,&base);
 612                         rc = dnNormalize( 0,NULL,NULL,&base,&mi->mi_base,NULL);
 613                         if ( rc )
 614                                 break;
 615                         if ( lud->lud_filter ) {
 616                                 /* steal this */
 617                                 ber_str2bv( lud->lud_filter,0,0,&mi->mi_filter);
 618                                 lud->lud_filter = NULL;
 619                         }
 620                         mi->mi_scope = lud->lud_scope;
 621                 } while(0);
 622                 ldap_free_urldesc( lud );
 623                 }
 624                 break;
 625         case NSS_MAP:
 626                 i = verb_to_mask(c->argv[1], nss_svcs);
 627                 if ( i == NM_NONE )
 628                         return 1;
 629                 rc = 1;
 630                 mi = &ni->ni_maps[i];
 631                 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) {
 632                         if (!strcasecmp(c->argv[2],mi->mi_attrkeys[j].bv_val)) {
 633                                 AttributeDescription *ad = NULL;
 634                                 const char *text;
 635                                 rc = slap_str2ad( c->argv[3], &ad, &text);
 636                                 if ( rc == 0 ) {
 637                                         mi->mi_attrs[j].an_desc = ad;
 638                                         mi->mi_attrs[j].an_name = ad->ad_cname;
 639                                 }
 640                                 break;
 641                         }
 642                 }
 643                 break;
 644         case NSS_PAM:
 645                 m = ni->ni_pam_opts;
 646                 i = verbs_to_mask(c->argc, c->argv, pam_opts, &m);
 647                 if (i == 0) {
 648                         ni->ni_pam_opts = m;
 649                         if ((m & NI_PAM_USERHOST) && !nssov_pam_host_ad) {
 650                                 const char *text;
 651                                 i = slap_str2ad("host", &nssov_pam_host_ad, &text);
 652                                 if (i != LDAP_SUCCESS) {
 653                                         snprintf(c->cr_msg, sizeof(c->cr_msg),
 654                                                 "nssov: host attr unknown: %s", text);
 655                                         Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0);
 656                                         rc = 1;
 657                                         break;
 658                                 }
 659                         }
 660                         if ((m & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) && !nssov_pam_svc_ad) {
 661                                 const char *text;
 662                                 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text);
 663                                 if (i != LDAP_SUCCESS) {
 664                                         snprintf(c->cr_msg, sizeof(c->cr_msg),
 665                                                 "nssov: authorizedService attr unknown: %s", text);
 666                                         Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0);
 667                                         rc = 1;
 668                                         break;
 669                                 }
 670                         }
 671                 } else {
 672                         rc = 1;
 673                 }
 674                 break;
 675         case NSS_PAMGROUP:
 676                 ni->ni_pam_group_dn = c->value_ndn;
 677                 ch_free( c->value_dn.bv_val );
 678                 break;
 679         }
 680         return rc;
 681 }
 682
 683 static int
 684 nssov_db_init(
 685         BackendDB *be,
 686         ConfigReply *cr )
 687 {
 688         slap_overinst *on = (slap_overinst *)be->bd_info;
 689         nssov_info *ni;
 690         nssov_mapinfo *mi;
 691         int i, j;
 692
 693         ni = ch_malloc( sizeof(nssov_info) );
 694         on->on_bi.bi_private = ni;
 695
 696         /* set up map keys */
 697         nssov_alias_init(ni);
 698         nssov_ether_init(ni);
 699         nssov_group_init(ni);
 700         nssov_host_init(ni);
 701         nssov_netgroup_init(ni);
 702         nssov_network_init(ni);
 703         nssov_passwd_init(ni);
 704         nssov_protocol_init(ni);
 705         nssov_rpc_init(ni);
 706         nssov_service_init(ni);
 707         nssov_shadow_init(ni);
 708
 709         ni->ni_db = be->bd_self;
 710
 711         return 0;
 712 }
 713
 714 static int
 715 nssov_db_destroy(
 716         BackendDB *be,
 717         ConfigReply *cr )
 718 {
 719 }
 720
 721 static int
 722 nssov_db_open(
 723         BackendDB *be,
 724         ConfigReply *cr )
 725 {
 726         slap_overinst *on = (slap_overinst *)be->bd_info;
 727         nssov_info *ni = on->on_bi.bi_private;
 728         nssov_mapinfo *mi;
 729
 730         int i, sock;
 731         struct sockaddr_un addr;
 732
 733         /* Set default bases */
 734         for (i=0; i<NM_NONE; i++) {
 735                 if ( BER_BVISNULL( &ni->ni_maps[i].mi_base )) {
 736                         ber_dupbv( &ni->ni_maps[i].mi_base, &be->be_nsuffix[0] );
 737                 }
 738                 if ( ni->ni_maps[i].mi_scope == LDAP_SCOPE_DEFAULT )
 739                         ni->ni_maps[i].mi_scope = LDAP_SCOPE_SUBTREE;
 740         }
 741         /* validate attribute maps */
 742         mi = ni->ni_maps;
 743         for ( i=0; i<NM_NONE; i++,mi++) {
 744                 const char *text;
 745                 int j;
 746                 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) {
 747                         /* skip attrs we already validated */
 748                         if ( mi->mi_attrs[j].an_desc ) continue;
 749                         if ( slap_bv2ad( &mi->mi_attrs[j].an_name,
 750                                 &mi->mi_attrs[j].an_desc, &text )) {
 751                                 Debug(LDAP_DEBUG_ANY,"nssov: invalid attr \"%s\": %s\n",
 752                                         mi->mi_attrs[j].an_name.bv_val, text, 0 );
 753                                 return -1;
 754                         }
 755                 }
 756                 BER_BVZERO(&mi->mi_attrs[j].an_name);
 757                 mi->mi_attrs[j].an_desc = NULL;
 758         }
 759
 760         /* Find host and authorizedService definitions */
 761         if ((ni->ni_pam_opts & NI_PAM_USERHOST) && !nssov_pam_host_ad)
 762         {
 763                 const char *text;
 764                 i = slap_str2ad("host", &nssov_pam_host_ad, &text);
 765                 if (i != LDAP_SUCCESS) {
 766                         Debug(LDAP_DEBUG_ANY,"nssov: host attr unknown: %s\n",
 767                                 text, 0, 0 );
 768                         return -1;
 769                 }
 770         }
 771         if ((ni->ni_pam_opts & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) &&
 772                 !nssov_pam_svc_ad)
 773         {
 774                 const char *text;
 775                 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text);
 776                 if (i != LDAP_SUCCESS) {
 777                         Debug(LDAP_DEBUG_ANY,"nssov: authorizedService attr unknown: %s\n",
 778                                 text, 0, 0 );
 779                         return -1;
 780                 }
 781         }
 782         if ( slapMode & SLAP_SERVER_MODE ) {
 783                 /* create a socket */
 784                 if ( (sock=socket(PF_UNIX,SOCK_STREAM,0))<0 )
 785                 {
 786                         Debug(LDAP_DEBUG_ANY,"nssov: cannot create socket: %s",strerror(errno),0,0);
 787                         return -1;
 788                 }
 789                 /* remove existing named socket */
 790                 if (unlink(NSLCD_SOCKET)<0)
 791                 {
 792                         Debug( LDAP_DEBUG_TRACE,"nssov: unlink() of "NSLCD_SOCKET" failed (ignored): %s",
 793                                                         strerror(errno),0,0);
 794                 }
 795                 /* create socket address structure */
 796                 memset(&addr,0,sizeof(struct sockaddr_un));
 797                 addr.sun_family=AF_UNIX;
 798                 strncpy(addr.sun_path,NSLCD_SOCKET,sizeof(addr.sun_path));
 799                 addr.sun_path[sizeof(addr.sun_path)-1]='\0';
 800                 /* bind to the named socket */
 801                 if (bind(sock,(struct sockaddr *)&addr,sizeof(struct sockaddr_un)))
 802                 {
 803                         Debug( LDAP_DEBUG_ANY,"nssov: bind() to "NSLCD_SOCKET" failed: %s",
 804                                                         strerror(errno),0,0);
 805                         if (close(sock))
 806                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 807                         return -1;
 808                 }
 809                 /* close the file descriptor on exit */
 810                 if (fcntl(sock,F_SETFD,FD_CLOEXEC)<0)
 811                 {
 812                         Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,O_NONBLOCK) failed: %s",strerror(errno),0,0);
 813                         if (close(sock))
 814                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 815                         return -1;
 816                 }
 817                 /* set permissions of socket so anybody can do requests */
 818                 /* Note: we use chmod() here instead of fchmod() because
 819                          fchmod does not work on sockets
 820                          http://www.opengroup.org/onlinepubs/009695399/functions/fchmod.html
 821                          http://lkml.org/lkml/2005/5/16/11 */
 822                 if (chmod(NSLCD_SOCKET,(mode_t)0666))
 823                 {
 824                         Debug( LDAP_DEBUG_ANY,"nssov: chmod(0666) failed: %s",strerror(errno),0,0);
 825                         if (close(sock))
 826                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 827                         return -1;
 828                 }
 829                 /* start listening for connections */
 830                 if (listen(sock,SOMAXCONN)<0)
 831                 {
 832                         Debug( LDAP_DEBUG_ANY,"nssov: listen() failed: %s",strerror(errno),0,0);
 833                         if (close(sock))
 834                                 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0);
 835                         return -1;
 836                 }
 837                 ni->ni_socket = sock;
 838                 ni->ni_conn = connection_client_setup( sock, acceptconn, ni );
 839         }
 840
 841         return 0;
 842 }
 843
 844 static int
 845 nssov_db_close(
 846         BackendDB *be,
 847         ConfigReply *cr )
 848 {
 849         slap_overinst *on = (slap_overinst *)be->bd_info;
 850         nssov_info *ni = on->on_bi.bi_private;
 851
 852         /* close socket if it's still in use */
 853         if (ni->ni_socket >= 0);
 854         {
 855                 if (close(ni->ni_socket))
 856                         Debug( LDAP_DEBUG_ANY,"problem closing server socket (ignored): %s",strerror(errno),0,0);
 857                 ni->ni_socket = -1;
 858         }
 859         /* remove existing named socket */
 860         if (unlink(NSLCD_SOCKET)<0)
 861         {
 862                 Debug( LDAP_DEBUG_TRACE,"unlink() of "NSLCD_SOCKET" failed (ignored): %s",
 863                         strerror(errno),0,0);
 864         }
 865 }
 866
 867 static slap_overinst nssov;
 868
 869 int
 870 nssov_initialize( void )
 871 {
 872         int rc;
 873
 874         nssov.on_bi.bi_type = "nssov";
 875         nssov.on_bi.bi_db_init = nssov_db_init;
 876         nssov.on_bi.bi_db_destroy = nssov_db_destroy;
 877         nssov.on_bi.bi_db_open = nssov_db_open;
 878         nssov.on_bi.bi_db_close = nssov_db_close;
 879
 880         nssov.on_bi.bi_cf_ocs = nssocs;
 881
 882         rc = config_register_schema( nsscfg, nssocs );
 883         if ( rc ) return rc;
 884
 885         return overlay_register(&nssov);
 886 }
 887
 888 #if SLAPD_OVER_NSSOV == SLAPD_MOD_DYNAMIC
 889 int
 890 init_module( int argc, char *argv[] )
 891 {
 892         return nssov_initialize();
 893 }
 894 #endif