1 /* $NetBSD: nssov.c,v 1.1.1.4 2014/05/28 09:58:28 tron Exp $ */ 2 3 /* nssov.c - nss-ldap overlay for slapd */ 4 /* $OpenLDAP$ */ 5 /* This work is part of OpenLDAP Software <http://www.openldap.org/>. 6 * 7 * Copyright 2008-2014 The OpenLDAP Foundation. 8 * Portions Copyright 2008 by Howard Chu, Symas Corp. 9 * Portions Copyright 2013 by Ted C. Cheng, Symas Corp. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted only as authorized by the OpenLDAP 14 * Public License. 15 * 16 * A copy of this license is available in the file LICENSE in the 17 * top-level directory of the distribution or, alternatively, at 18 * <http://www.OpenLDAP.org/license.html>. 19 */ 20 /* ACKNOWLEDGEMENTS: 21 * This code references portions of the nss-ldapd package 22 * written by Arthur de Jong. The nss-ldapd code was forked 23 * from the nss-ldap library written by Luke Howard. 24 */ 25 26 #include "nssov.h" 27 28 #ifndef SLAPD_OVER_NSSOV 29 #define SLAPD_OVER_NSSOV SLAPD_MOD_DYNAMIC 30 #endif 31 32 #include "../slapd/config.h" /* not nss-ldapd config.h */ 33 34 #include "lutil.h" 35 36 #include <ac/errno.h> 37 #include <ac/unistd.h> 38 #include <fcntl.h> 39 #include <sys/stat.h> 40 41 AttributeDescription *nssov_pam_host_ad; 42 AttributeDescription *nssov_pam_svc_ad; 43 44 /* buffer sizes for I/O */ 45 #define READBUFFER_MINSIZE 32 46 #define READBUFFER_MAXSIZE 64 47 #define WRITEBUFFER_MINSIZE 64 48 #define WRITEBUFFER_MAXSIZE 64*1024 49 50 /* Find the given attribute's value in the RDN of the DN */ 51 int nssov_find_rdnval(struct berval *dn, AttributeDescription *ad, struct berval *value) 52 { 53 struct berval rdn; 54 char *next; 55 56 BER_BVZERO(value); 57 dnRdn( dn, &rdn ); 58 do { 59 next = ber_bvchr( &rdn, '+' ); 60 if ( rdn.bv_val[ad->ad_cname.bv_len] == '=' && 61 !ber_bvcmp( &rdn, &ad->ad_cname )) { 62 if ( next ) 63 rdn.bv_len = next - rdn.bv_val; 64 value->bv_val = rdn.bv_val + ad->ad_cname.bv_len + 1; 65 value->bv_len = rdn.bv_len - ad->ad_cname.bv_len - 1; 66 break; 67 } 68 if ( !next ) 69 break; 70 next++; 71 rdn.bv_len -= next - rdn.bv_val; 72 rdn.bv_val = next; 73 } while (1); 74 } 75 76 /* create a search filter using a name that requires escaping */ 77 int nssov_filter_byname(nssov_mapinfo *mi,int key,struct berval *name,struct berval *buf) 78 { 79 char buf2[1024]; 80 struct berval bv2 = {sizeof(buf2),buf2}; 81 82 /* escape attribute */ 83 if (nssov_escape(name,&bv2)) 84 return -1; 85 /* build filter */ 86 if (bv2.bv_len + mi->mi_filter.bv_len + mi->mi_attrs[key].an_desc->ad_cname.bv_len + 6 > 87 buf->bv_len ) 88 return -1; 89 buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))", 90 mi->mi_filter.bv_val, mi->mi_attrs[key].an_desc->ad_cname.bv_val, 91 bv2.bv_val ); 92 return 0; 93 } 94 95 /* create a search filter using a string converted from an int */ 96 int nssov_filter_byid(nssov_mapinfo *mi,int key,struct berval *id,struct berval *buf) 97 { 98 /* build filter */ 99 if (id->bv_len + mi->mi_filter.bv_len + mi->mi_attrs[key].an_desc->ad_cname.bv_len + 6 > 100 buf->bv_len ) 101 return -1; 102 buf->bv_len = snprintf(buf->bv_val, buf->bv_len, "(&%s(%s=%s))", 103 mi->mi_filter.bv_val, mi->mi_attrs[key].an_desc->ad_cname.bv_val, 104 id->bv_val ); 105 return 0; 106 } 107 108 void get_userpassword(struct berval *attr,struct berval *pw) 109 { 110 int i; 111 /* go over the entries and return the remainder of the value if it 112 starts with {crypt} or crypt$ */ 113 for (i=0;!BER_BVISNULL(&attr[i]);i++) 114 { 115 if (strncasecmp(attr[i].bv_val,"{crypt}",7)==0) { 116 pw->bv_val = attr[i].bv_val + 7; 117 pw->bv_len = attr[i].bv_len - 7; 118 return; 119 } 120 if (strncasecmp(attr[i].bv_val,"crypt$",6)==0) { 121 pw->bv_val = attr[i].bv_val + 6; 122 pw->bv_len = attr[i].bv_len - 6; 123 return; 124 } 125 } 126 /* just return the first value completely */ 127 *pw = *attr; 128 /* TODO: support more password formats e.g. SMD5 129 (which is $1$ but in a different format) 130 (any code for this is more than welcome) */ 131 } 132 133 /* this writes a single address to the stream */ 134 int write_address(TFILE *fp,struct berval *addr) 135 { 136 int32_t tmpint32; 137 struct in_addr ipv4addr; 138 struct in6_addr ipv6addr; 139 /* try to parse the address as IPv4 first, fall back to IPv6 */ 140 if (inet_pton(AF_INET,addr->bv_val,&ipv4addr)>0) 141 { 142 /* write address type */ 143 WRITE_INT32(fp,AF_INET); 144 /* write the address length */ 145 WRITE_INT32(fp,sizeof(struct in_addr)); 146 /* write the address itself (in network byte order) */ 147 WRITE_TYPE(fp,ipv4addr,struct in_addr); 148 } 149 else if (inet_pton(AF_INET6,addr->bv_val,&ipv6addr)>0) 150 { 151 /* write address type */ 152 WRITE_INT32(fp,AF_INET6); 153 /* write the address length */ 154 WRITE_INT32(fp,sizeof(struct in6_addr)); 155 /* write the address itself (in network byte order) */ 156 WRITE_TYPE(fp,ipv6addr,struct in6_addr); 157 } 158 else 159 { 160 /* failure, log but write simple invalid address 161 (otherwise the address list is messed up) */ 162 /* TODO: have error message in correct format */ 163 Debug(LDAP_DEBUG_ANY,"nssov: unparseable address: %s\n",addr->bv_val,0,0); 164 /* write an illegal address type */ 165 WRITE_INT32(fp,-1); 166 /* write an empty address */ 167 WRITE_INT32(fp,0); 168 } 169 /* we're done */ 170 return 0; 171 } 172 173 int read_address(TFILE *fp,char *addr,int *addrlen,int *af) 174 { 175 int32_t tmpint32; 176 int len; 177 /* read address family */ 178 READ_INT32(fp,*af); 179 if ((*af!=AF_INET)&&(*af!=AF_INET6)) 180 { 181 Debug(LDAP_DEBUG_ANY,"nssov: incorrect address family specified: %d\n",*af,0,0); 182 return -1; 183 } 184 /* read address length */ 185 READ_INT32(fp,len); 186 if ((len>*addrlen)||(len<=0)) 187 { 188 Debug(LDAP_DEBUG_ANY,"nssov: address length incorrect: %d\n",len,0,0); 189 return -1; 190 } 191 *addrlen=len; 192 /* read address */ 193 READ(fp,addr,len); 194 /* we're done */ 195 return 0; 196 } 197 198 int nssov_escape(struct berval *src,struct berval *dst) 199 { 200 size_t pos=0; 201 int i; 202 /* go over all characters in source string */ 203 for (i=0;i<src->bv_len;i++) 204 { 205 /* check if char will fit */ 206 if (pos>=(dst->bv_len-4)) 207 return -1; 208 /* do escaping for some characters */ 209 switch (src->bv_val[i]) 210 { 211 case '*': 212 strcpy(dst->bv_val+pos,"\\2a"); 213 pos+=3; 214 break; 215 case '(': 216 strcpy(dst->bv_val+pos,"\\28"); 217 pos+=3; 218 break; 219 case ')': 220 strcpy(dst->bv_val+pos,"\\29"); 221 pos+=3; 222 break; 223 case '\\': 224 strcpy(dst->bv_val+pos,"\\5c"); 225 pos+=3; 226 break; 227 default: 228 /* just copy character */ 229 dst->bv_val[pos++]=src->bv_val[i]; 230 break; 231 } 232 } 233 /* terminate destination string */ 234 dst->bv_val[pos]='\0'; 235 dst->bv_len = pos; 236 return 0; 237 } 238 239 /* read the version information and action from the stream 240 this function returns the read action in location pointer to by action */ 241 static int read_header(TFILE *fp,int32_t *action) 242 { 243 int32_t tmpint32; 244 /* read the protocol version */ 245 READ_TYPE(fp,tmpint32,int32_t); 246 if (tmpint32 != (int32_t)NSLCD_VERSION) 247 { 248 Debug( LDAP_DEBUG_TRACE,"nssov: wrong nslcd version id (%d)\n",(int)tmpint32,0,0); 249 return -1; 250 } 251 /* read the request type */ 252 READ(fp,action,sizeof(int32_t)); 253 return 0; 254 } 255 256 int nssov_config(nssov_info *ni,TFILE *fp,Operation *op) 257 { 258 int opt; 259 int32_t tmpint32; 260 struct berval *msg = BER_BVC(""); 261 int rc = NSLCD_PAM_SUCCESS; 262 263 READ_INT32(fp,opt); 264 265 Debug(LDAP_DEBUG_TRACE, "nssov_config (%d)\n",opt,0,0); 266 267 switch (opt) { 268 case NSLCD_CONFIG_PAM_PASSWORD_PROHIBIT_MESSAGE: 269 /* request for pam password_prothibit_message */ 270 /* nssov_pam prohibits password */ 271 if (!BER_BVISEMPTY(&ni->ni_pam_password_prohibit_message)) { 272 Debug(LDAP_DEBUG_TRACE,"nssov_config(): %s (%s)\n", 273 "password_prohibit_message", 274 ni->ni_pam_password_prohibit_message.bv_val,0); 275 msg = &ni->ni_pam_password_prohibit_message; 276 rc = NSLCD_PAM_PERM_DENIED; 277 } 278 /* fall through */ 279 default: 280 break; 281 } 282 283 done:; 284 WRITE_INT32(fp,NSLCD_VERSION); 285 WRITE_INT32(fp,NSLCD_ACTION_CONFIG_GET); 286 WRITE_INT32(fp,NSLCD_RESULT_BEGIN); 287 WRITE_BERVAL(fp,msg); 288 WRITE_INT32(fp,NSLCD_RESULT_END); 289 return 0; 290 } 291 292 293 /* read a request message, returns <0 in case of errors, 294 this function closes the socket */ 295 static void handleconnection(nssov_info *ni,int sock,Operation *op) 296 { 297 TFILE *fp; 298 int32_t action; 299 int readtimeout,writetimeout; 300 uid_t uid; 301 gid_t gid; 302 char authid[sizeof("gidNumber=4294967295+uidNumber=424967295,cn=peercred,cn=external,cn=auth")]; 303 char peerbuf[8]; 304 struct berval peerbv = { sizeof(peerbuf), peerbuf }; 305 306 /* log connection */ 307 if (LUTIL_GETPEEREID(sock,&uid,&gid,&peerbv)) 308 Debug( LDAP_DEBUG_TRACE,"nssov: connection from unknown client: %s\n",strerror(errno),0,0); 309 else 310 Debug( LDAP_DEBUG_TRACE,"nssov: connection from uid=%d gid=%d\n", 311 (int)uid,(int)gid,0); 312 313 /* Should do authid mapping too */ 314 op->o_dn.bv_len = sprintf(authid,"gidNumber=%d+uidNumber=%d,cn=peercred,cn=external,cn=auth", 315 (int)gid, (int)uid ); 316 op->o_dn.bv_val = authid; 317 op->o_ndn = op->o_dn; 318 319 /* set the timeouts: 320 * read timeout is half a second because clients should send their request 321 * quickly, write timeout is 60 seconds because clients could be taking some 322 * time to process the results 323 */ 324 readtimeout = 500; 325 writetimeout = 60000; 326 /* create a stream object */ 327 if ((fp=tio_fdopen(sock,readtimeout,writetimeout, 328 READBUFFER_MINSIZE,READBUFFER_MAXSIZE, 329 WRITEBUFFER_MINSIZE,WRITEBUFFER_MAXSIZE))==NULL) 330 { 331 Debug( LDAP_DEBUG_ANY,"nssov: cannot create stream for writing: %s",strerror(errno),0,0); 332 (void)close(sock); 333 return; 334 } 335 /* read request */ 336 if (read_header(fp,&action)) 337 { 338 (void)tio_close(fp); 339 return; 340 } 341 /* handle request */ 342 switch (action) 343 { 344 case NSLCD_ACTION_ALIAS_BYNAME: (void)nssov_alias_byname(ni,fp,op); break; 345 case NSLCD_ACTION_ALIAS_ALL: (void)nssov_alias_all(ni,fp,op); break; 346 case NSLCD_ACTION_ETHER_BYNAME: (void)nssov_ether_byname(ni,fp,op); break; 347 case NSLCD_ACTION_ETHER_BYETHER: (void)nssov_ether_byether(ni,fp,op); break; 348 case NSLCD_ACTION_ETHER_ALL: (void)nssov_ether_all(ni,fp,op); break; 349 case NSLCD_ACTION_GROUP_BYNAME: (void)nssov_group_byname(ni,fp,op); break; 350 case NSLCD_ACTION_GROUP_BYGID: (void)nssov_group_bygid(ni,fp,op); break; 351 case NSLCD_ACTION_GROUP_BYMEMBER: (void)nssov_group_bymember(ni,fp,op); break; 352 case NSLCD_ACTION_GROUP_ALL: (void)nssov_group_all(ni,fp,op); break; 353 case NSLCD_ACTION_HOST_BYNAME: (void)nssov_host_byname(ni,fp,op); break; 354 case NSLCD_ACTION_HOST_BYADDR: (void)nssov_host_byaddr(ni,fp,op); break; 355 case NSLCD_ACTION_HOST_ALL: (void)nssov_host_all(ni,fp,op); break; 356 case NSLCD_ACTION_NETGROUP_BYNAME: (void)nssov_netgroup_byname(ni,fp,op); break; 357 case NSLCD_ACTION_NETWORK_BYNAME: (void)nssov_network_byname(ni,fp,op); break; 358 case NSLCD_ACTION_NETWORK_BYADDR: (void)nssov_network_byaddr(ni,fp,op); break; 359 case NSLCD_ACTION_NETWORK_ALL: (void)nssov_network_all(ni,fp,op); break; 360 case NSLCD_ACTION_PASSWD_BYNAME: (void)nssov_passwd_byname(ni,fp,op); break; 361 case NSLCD_ACTION_PASSWD_BYUID: (void)nssov_passwd_byuid(ni,fp,op); break; 362 case NSLCD_ACTION_PASSWD_ALL: (void)nssov_passwd_all(ni,fp,op); break; 363 case NSLCD_ACTION_PROTOCOL_BYNAME: (void)nssov_protocol_byname(ni,fp,op); break; 364 case NSLCD_ACTION_PROTOCOL_BYNUMBER:(void)nssov_protocol_bynumber(ni,fp,op); break; 365 case NSLCD_ACTION_PROTOCOL_ALL: (void)nssov_protocol_all(ni,fp,op); break; 366 case NSLCD_ACTION_RPC_BYNAME: (void)nssov_rpc_byname(ni,fp,op); break; 367 case NSLCD_ACTION_RPC_BYNUMBER: (void)nssov_rpc_bynumber(ni,fp,op); break; 368 case NSLCD_ACTION_RPC_ALL: (void)nssov_rpc_all(ni,fp,op); break; 369 case NSLCD_ACTION_SERVICE_BYNAME: (void)nssov_service_byname(ni,fp,op); break; 370 case NSLCD_ACTION_SERVICE_BYNUMBER: (void)nssov_service_bynumber(ni,fp,op); break; 371 case NSLCD_ACTION_SERVICE_ALL: (void)nssov_service_all(ni,fp,op); break; 372 case NSLCD_ACTION_SHADOW_BYNAME: if (uid==0) (void)nssov_shadow_byname(ni,fp,op); break; 373 case NSLCD_ACTION_SHADOW_ALL: if (uid==0) (void)nssov_shadow_all(ni,fp,op); break; 374 case NSLCD_ACTION_PAM_AUTHC: (void)pam_authc(ni,fp,op); break; 375 case NSLCD_ACTION_PAM_AUTHZ: (void)pam_authz(ni,fp,op); break; 376 case NSLCD_ACTION_PAM_SESS_O: if (uid==0) (void)pam_sess_o(ni,fp,op); break; 377 case NSLCD_ACTION_PAM_SESS_C: if (uid==0) (void)pam_sess_c(ni,fp,op); break; 378 case NSLCD_ACTION_PAM_PWMOD: (void)pam_pwmod(ni,fp,op); break; 379 case NSLCD_ACTION_CONFIG_GET: (void)nssov_config(ni,fp,op); break; 380 default: 381 Debug( LDAP_DEBUG_ANY,"nssov: invalid request id: %d",(int)action,0,0); 382 break; 383 } 384 /* we're done with the request */ 385 (void)tio_close(fp); 386 return; 387 } 388 389 /* accept a connection on the socket */ 390 static void *acceptconn(void *ctx, void *arg) 391 { 392 nssov_info *ni = arg; 393 Connection conn = {0}; 394 OperationBuffer opbuf; 395 Operation *op; 396 int csock; 397 398 if ( slapd_shutdown ) 399 return NULL; 400 401 { 402 struct sockaddr_storage addr; 403 socklen_t alen; 404 int j; 405 406 /* accept a new connection */ 407 alen=(socklen_t)sizeof(struct sockaddr_storage); 408 csock=accept(ni->ni_socket,(struct sockaddr *)&addr,&alen); 409 connection_client_enable(ni->ni_conn); 410 if (csock<0) 411 { 412 if ((errno==EINTR)||(errno==EAGAIN)||(errno==EWOULDBLOCK)) 413 { 414 Debug( LDAP_DEBUG_TRACE,"nssov: accept() failed (ignored): %s",strerror(errno),0,0); 415 return; 416 } 417 Debug( LDAP_DEBUG_ANY,"nssov: accept() failed: %s",strerror(errno),0,0); 418 return; 419 } 420 /* make sure O_NONBLOCK is not inherited */ 421 if ((j=fcntl(csock,F_GETFL,0))<0) 422 { 423 Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_GETFL) failed: %s",strerror(errno),0,0); 424 if (close(csock)) 425 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 426 return; 427 } 428 if (fcntl(csock,F_SETFL,j&~O_NONBLOCK)<0) 429 { 430 Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,~O_NONBLOCK) failed: %s",strerror(errno),0,0); 431 if (close(csock)) 432 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 433 return; 434 } 435 } 436 connection_fake_init( &conn, &opbuf, ctx ); 437 op=&opbuf.ob_op; 438 conn.c_ssf = conn.c_transport_ssf = local_ssf; 439 op->o_bd = ni->ni_db; 440 op->o_tag = LDAP_REQ_SEARCH; 441 442 /* handle the connection */ 443 handleconnection(ni,csock,op); 444 } 445 446 static slap_verbmasks nss_svcs[] = { 447 { BER_BVC("aliases"), NM_alias }, 448 { BER_BVC("ethers"), NM_ether }, 449 { BER_BVC("group"), NM_group }, 450 { BER_BVC("hosts"), NM_host }, 451 { BER_BVC("netgroup"), NM_netgroup }, 452 { BER_BVC("networks"), NM_network }, 453 { BER_BVC("passwd"), NM_passwd }, 454 { BER_BVC("protocols"), NM_protocol }, 455 { BER_BVC("rpc"), NM_rpc }, 456 { BER_BVC("services"), NM_service }, 457 { BER_BVC("shadow"), NM_shadow }, 458 { BER_BVNULL, 0 } 459 }; 460 461 static slap_verbmasks pam_opts[] = { 462 { BER_BVC("userhost"), NI_PAM_USERHOST }, 463 { BER_BVC("userservice"), NI_PAM_USERSVC }, 464 { BER_BVC("usergroup"), NI_PAM_USERGRP }, 465 { BER_BVC("hostservice"), NI_PAM_HOSTSVC }, 466 { BER_BVC("authz2dn"), NI_PAM_SASL2DN }, 467 { BER_BVC("uid2dn"), NI_PAM_UID2DN }, 468 { BER_BVNULL, 0 } 469 }; 470 471 enum { 472 NSS_SSD=1, 473 NSS_MAP, 474 NSS_PAM, 475 NSS_PAMGROUP, 476 NSS_PAMSESS 477 }; 478 479 static ConfigDriver nss_cf_gen; 480 481 static ConfigTable nsscfg[] = { 482 { "nssov-ssd", "service> <url", 3, 3, 0, ARG_MAGIC|NSS_SSD, 483 nss_cf_gen, "(OLcfgCtAt:3.1 NAME 'olcNssSsd' " 484 "DESC 'URL for searches in a given service' " 485 "EQUALITY caseIgnoreMatch " 486 "SYNTAX OMsDirectoryString )", NULL, NULL }, 487 { "nssov-map", "service> <orig> <new", 4, 4, 0, ARG_MAGIC|NSS_MAP, 488 nss_cf_gen, "(OLcfgCtAt:3.2 NAME 'olcNssMap' " 489 "DESC 'Map <service> lookups of <orig> attr to <new> attr' " 490 "EQUALITY caseIgnoreMatch " 491 "SYNTAX OMsDirectoryString )", NULL, NULL }, 492 { "nssov-pam", "options", 2, 0, 0, ARG_MAGIC|NSS_PAM, 493 nss_cf_gen, "(OLcfgCtAt:3.3 NAME 'olcNssPam' " 494 "DESC 'PAM authentication and authorization options' " 495 "EQUALITY caseIgnoreMatch " 496 "SYNTAX OMsDirectoryString )", NULL, NULL }, 497 { "nssov-pam-defhost", "hostname", 2, 2, 0, ARG_OFFSET|ARG_BERVAL, 498 (void *)offsetof(struct nssov_info, ni_pam_defhost), 499 "(OLcfgCtAt:3.4 NAME 'olcNssPamDefHost' " 500 "DESC 'Default hostname for service checks' " 501 "EQUALITY caseIgnoreMatch " 502 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 503 { "nssov-pam-group-dn", "DN", 2, 2, 0, ARG_MAGIC|ARG_DN|NSS_PAMGROUP, 504 nss_cf_gen, "(OLcfgCtAt:3.5 NAME 'olcNssPamGroupDN' " 505 "DESC 'DN of group in which membership is required' " 506 "EQUALITY distinguishedNameMatch " 507 "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL }, 508 { "nssov-pam-group-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC, 509 (void *)offsetof(struct nssov_info, ni_pam_group_ad), 510 "(OLcfgCtAt:3.6 NAME 'olcNssPamGroupAD' " 511 "DESC 'Member attribute to use for group check' " 512 "EQUALITY caseIgnoreMatch " 513 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 514 { "nssov-pam-min-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT, 515 (void *)offsetof(struct nssov_info, ni_pam_min_uid), 516 "(OLcfgCtAt:3.7 NAME 'olcNssPamMinUid' " 517 "DESC 'Minimum UID allowed to login' " 518 "EQUALITY integerMatch " 519 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, 520 { "nssov-pam-max-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT, 521 (void *)offsetof(struct nssov_info, ni_pam_max_uid), 522 "(OLcfgCtAt:3.8 NAME 'olcNssPamMaxUid' " 523 "DESC 'Maximum UID allowed to login' " 524 "EQUALITY integerMatch " 525 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, 526 { "nssov-pam-template-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC, 527 (void *)offsetof(struct nssov_info, ni_pam_template_ad), 528 "(OLcfgCtAt:3.9 NAME 'olcNssPamTemplateAD' " 529 "DESC 'Attribute to use for template login name' " 530 "EQUALITY caseIgnoreMatch " 531 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 532 { "nssov-pam-template", "name", 2, 2, 0, ARG_OFFSET|ARG_BERVAL, 533 (void *)offsetof(struct nssov_info, ni_pam_template), 534 "(OLcfgCtAt:3.10 NAME 'olcNssPamTemplate' " 535 "DESC 'Default template login name' " 536 "EQUALITY caseIgnoreMatch " 537 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 538 { "nssov-pam-session", "service", 2, 2, 0, ARG_MAGIC|NSS_PAMSESS, 539 nss_cf_gen, "(OLcfgCtAt:3.11 NAME 'olcNssPamSession' " 540 "DESC 'Services for which sessions will be recorded' " 541 "EQUALITY caseIgnoreMatch " 542 "SYNTAX OMsDirectoryString )", NULL, NULL }, 543 { "nssov-pam-password-prohibit-message", 544 "password_prohibit_message", 2, 2, 0, 545 ARG_OFFSET|ARG_BERVAL, 546 (void *)offsetof(struct nssov_info, ni_pam_password_prohibit_message), 547 "(OLcfgCtAt:3.12 NAME 'olcNssPamPwdProhibitMsg' " 548 "DESC 'Prohibit password modification message' " 549 "EQUALITY caseIgnoreMatch " 550 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 551 { "nssov-pam-pwdmgr-dn", 552 "pwdmgr_dn", 2, 2, 0, 553 ARG_OFFSET|ARG_BERVAL, 554 (void *)offsetof(struct nssov_info, ni_pam_pwdmgr_dn), 555 "(OLcfgCtAt:3.13 NAME 'olcPamPwdmgrDn' " 556 "DESC 'Password Manager DN' " 557 "EQUALITY distinguishedNameMatch " 558 "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL }, 559 { "nssov-pam-pwdmgr-pwd", 560 "pwdmgr_pwd", 2, 2, 0, 561 ARG_OFFSET|ARG_BERVAL, 562 (void *)offsetof(struct nssov_info, ni_pam_pwdmgr_pwd), 563 "(OLcfgCtAt:3.14 NAME 'olcPamPwdmgrPwd' " 564 "DESC 'Password Manager Pwd' " 565 "EQUALITY octetStringMatch " 566 "SYNTAX OMsOctetString SINGLE-VALUE )", NULL, NULL }, 567 { NULL, NULL, 0,0,0, ARG_IGNORED } 568 }; 569 570 static ConfigOCs nssocs[] = { 571 { "( OLcfgCtOc:3.1 " 572 "NAME 'olcNssOvConfig' " 573 "DESC 'NSS lookup configuration' " 574 "SUP olcOverlayConfig " 575 "MAY ( olcNssSsd $ olcNssMap $ olcNssPam $ olcNssPamDefHost $ " 576 "olcNssPamGroupDN $ olcNssPamGroupAD $ " 577 "olcNssPamMinUid $ olcNssPamMaxUid $ olcNssPamSession $ " 578 "olcNssPamTemplateAD $ olcNssPamTemplate ) )", 579 Cft_Overlay, nsscfg }, 580 { NULL, 0, NULL } 581 }; 582 583 static int 584 nss_cf_gen(ConfigArgs *c) 585 { 586 slap_overinst *on = (slap_overinst *)c->bi; 587 nssov_info *ni = on->on_bi.bi_private; 588 nssov_mapinfo *mi; 589 int i, j, rc = 0; 590 slap_mask_t m; 591 592 if ( c->op == SLAP_CONFIG_EMIT ) { 593 switch(c->type) { 594 case NSS_SSD: 595 rc = 1; 596 for (i=NM_alias;i<NM_NONE;i++) { 597 struct berval scope; 598 struct berval ssd; 599 struct berval base; 600 601 mi = &ni->ni_maps[i]; 602 603 /* ignore all-default services */ 604 if ( mi->mi_scope == LDAP_SCOPE_DEFAULT && 605 bvmatch( &mi->mi_filter, &mi->mi_filter0 ) && 606 BER_BVISNULL( &mi->mi_base )) 607 continue; 608 609 if ( BER_BVISNULL( &mi->mi_base )) 610 base = ni->ni_db->be_nsuffix[0]; 611 else 612 base = mi->mi_base; 613 ldap_pvt_scope2bv(mi->mi_scope == LDAP_SCOPE_DEFAULT ? 614 LDAP_SCOPE_SUBTREE : mi->mi_scope, &scope); 615 ssd.bv_len = STRLENOF(" ldap:///???") + nss_svcs[i].word.bv_len + 616 base.bv_len + scope.bv_len + mi->mi_filter.bv_len; 617 ssd.bv_val = ch_malloc( ssd.bv_len + 1 ); 618 sprintf(ssd.bv_val, "%s ldap:///%s??%s?%s", nss_svcs[i].word.bv_val, 619 base.bv_val, scope.bv_val, mi->mi_filter.bv_val ); 620 ber_bvarray_add( &c->rvalue_vals, &ssd ); 621 rc = 0; 622 } 623 break; 624 case NSS_MAP: 625 rc = 1; 626 for (i=NM_alias;i<NM_NONE;i++) { 627 628 mi = &ni->ni_maps[i]; 629 for (j=0;!BER_BVISNULL(&mi->mi_attrkeys[j]);j++) { 630 if ( ber_bvstrcasecmp(&mi->mi_attrkeys[j], 631 &mi->mi_attrs[j].an_name)) { 632 struct berval map; 633 634 map.bv_len = nss_svcs[i].word.bv_len + 635 mi->mi_attrkeys[j].bv_len + 636 mi->mi_attrs[j].an_desc->ad_cname.bv_len + 2; 637 map.bv_val = ch_malloc(map.bv_len + 1); 638 sprintf(map.bv_val, "%s %s %s", nss_svcs[i].word.bv_val, 639 mi->mi_attrkeys[j].bv_val, mi->mi_attrs[j].an_desc->ad_cname.bv_val ); 640 ber_bvarray_add( &c->rvalue_vals, &map ); 641 rc = 0; 642 } 643 } 644 } 645 break; 646 case NSS_PAM: 647 rc = mask_to_verbs( pam_opts, ni->ni_pam_opts, &c->rvalue_vals ); 648 break; 649 case NSS_PAMGROUP: 650 if (!BER_BVISEMPTY( &ni->ni_pam_group_dn )) { 651 value_add_one( &c->rvalue_vals, &ni->ni_pam_group_dn ); 652 value_add_one( &c->rvalue_nvals, &ni->ni_pam_group_dn ); 653 } else { 654 rc = 1; 655 } 656 break; 657 case NSS_PAMSESS: 658 if (ni->ni_pam_sessions) { 659 ber_bvarray_dup_x( &c->rvalue_vals, ni->ni_pam_sessions, NULL ); 660 } else { 661 rc = 1; 662 } 663 break; 664 } 665 return rc; 666 } else if ( c->op == LDAP_MOD_DELETE ) { 667 /* FIXME */ 668 return 1; 669 } 670 switch( c->type ) { 671 case NSS_SSD: { 672 LDAPURLDesc *lud; 673 674 i = verb_to_mask(c->argv[1], nss_svcs); 675 if ( i == NM_NONE ) 676 return 1; 677 678 mi = &ni->ni_maps[i]; 679 rc = ldap_url_parse(c->argv[2], &lud); 680 if ( rc ) 681 return 1; 682 do { 683 struct berval base; 684 /* Must be LDAP scheme */ 685 if (strcasecmp(lud->lud_scheme,"ldap")) { 686 rc = 1; 687 break; 688 } 689 /* Host part, attrs, and extensions must be empty */ 690 if (( lud->lud_host && *lud->lud_host ) || 691 lud->lud_attrs || lud->lud_exts ) { 692 rc = 1; 693 break; 694 } 695 ber_str2bv( lud->lud_dn,0,0,&base); 696 rc = dnNormalize( 0,NULL,NULL,&base,&mi->mi_base,NULL); 697 if ( rc ) 698 break; 699 if ( lud->lud_filter ) { 700 /* steal this */ 701 ber_str2bv( lud->lud_filter,0,0,&mi->mi_filter); 702 lud->lud_filter = NULL; 703 } 704 mi->mi_scope = lud->lud_scope; 705 } while(0); 706 ldap_free_urldesc( lud ); 707 } 708 break; 709 case NSS_MAP: 710 i = verb_to_mask(c->argv[1], nss_svcs); 711 if ( i == NM_NONE ) 712 return 1; 713 rc = 1; 714 mi = &ni->ni_maps[i]; 715 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) { 716 if (!strcasecmp(c->argv[2],mi->mi_attrkeys[j].bv_val)) { 717 AttributeDescription *ad = NULL; 718 const char *text; 719 rc = slap_str2ad( c->argv[3], &ad, &text); 720 if ( rc == 0 ) { 721 mi->mi_attrs[j].an_desc = ad; 722 mi->mi_attrs[j].an_name = ad->ad_cname; 723 } 724 break; 725 } 726 } 727 break; 728 case NSS_PAM: 729 m = ni->ni_pam_opts; 730 i = verbs_to_mask(c->argc, c->argv, pam_opts, &m); 731 if (i == 0) { 732 ni->ni_pam_opts = m; 733 if ((m & NI_PAM_USERHOST) && !nssov_pam_host_ad) { 734 const char *text; 735 i = slap_str2ad("host", &nssov_pam_host_ad, &text); 736 if (i != LDAP_SUCCESS) { 737 snprintf(c->cr_msg, sizeof(c->cr_msg), 738 "nssov: host attr unknown: %s", text); 739 Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0); 740 rc = 1; 741 break; 742 } 743 } 744 if ((m & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) && !nssov_pam_svc_ad) { 745 const char *text; 746 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text); 747 if (i != LDAP_SUCCESS) { 748 snprintf(c->cr_msg, sizeof(c->cr_msg), 749 "nssov: authorizedService attr unknown: %s", text); 750 Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0); 751 rc = 1; 752 break; 753 } 754 } 755 } else { 756 rc = 1; 757 } 758 break; 759 case NSS_PAMGROUP: 760 ni->ni_pam_group_dn = c->value_ndn; 761 ch_free( c->value_dn.bv_val ); 762 break; 763 case NSS_PAMSESS: 764 ber_str2bv( c->argv[1], 0, 1, &c->value_bv ); 765 ber_bvarray_add( &ni->ni_pam_sessions, &c->value_bv ); 766 break; 767 } 768 return rc; 769 } 770 771 static int 772 nssov_db_init( 773 BackendDB *be, 774 ConfigReply *cr ) 775 { 776 slap_overinst *on = (slap_overinst *)be->bd_info; 777 nssov_info *ni; 778 nssov_mapinfo *mi; 779 int rc; 780 781 rc = nssov_pam_init(); 782 if (rc) return rc; 783 784 ni = ch_calloc( 1, sizeof(nssov_info) ); 785 on->on_bi.bi_private = ni; 786 787 /* set up map keys */ 788 nssov_alias_init(ni); 789 nssov_ether_init(ni); 790 nssov_group_init(ni); 791 nssov_host_init(ni); 792 nssov_netgroup_init(ni); 793 nssov_network_init(ni); 794 nssov_passwd_init(ni); 795 nssov_protocol_init(ni); 796 nssov_rpc_init(ni); 797 nssov_service_init(ni); 798 nssov_shadow_init(ni); 799 800 ni->ni_db = be->bd_self; 801 ni->ni_pam_opts = NI_PAM_UID2DN; 802 803 return 0; 804 } 805 806 static int 807 nssov_db_destroy( 808 BackendDB *be, 809 ConfigReply *cr ) 810 { 811 } 812 813 static int 814 nssov_db_open( 815 BackendDB *be, 816 ConfigReply *cr ) 817 { 818 slap_overinst *on = (slap_overinst *)be->bd_info; 819 nssov_info *ni = on->on_bi.bi_private; 820 nssov_mapinfo *mi; 821 822 int i, sock; 823 struct sockaddr_un addr; 824 825 /* Set default bases */ 826 for (i=0; i<NM_NONE; i++) { 827 if ( BER_BVISNULL( &ni->ni_maps[i].mi_base )) { 828 ber_dupbv( &ni->ni_maps[i].mi_base, &be->be_nsuffix[0] ); 829 } 830 if ( ni->ni_maps[i].mi_scope == LDAP_SCOPE_DEFAULT ) 831 ni->ni_maps[i].mi_scope = LDAP_SCOPE_SUBTREE; 832 } 833 /* validate attribute maps */ 834 mi = ni->ni_maps; 835 for ( i=0; i<NM_NONE; i++,mi++) { 836 const char *text; 837 int j; 838 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) { 839 /* skip attrs we already validated */ 840 if ( mi->mi_attrs[j].an_desc ) continue; 841 if ( slap_bv2ad( &mi->mi_attrs[j].an_name, 842 &mi->mi_attrs[j].an_desc, &text )) { 843 Debug(LDAP_DEBUG_ANY,"nssov: invalid attr \"%s\": %s\n", 844 mi->mi_attrs[j].an_name.bv_val, text, 0 ); 845 return -1; 846 } 847 } 848 BER_BVZERO(&mi->mi_attrs[j].an_name); 849 mi->mi_attrs[j].an_desc = NULL; 850 } 851 852 /* Find host and authorizedService definitions */ 853 if ((ni->ni_pam_opts & NI_PAM_USERHOST) && !nssov_pam_host_ad) 854 { 855 const char *text; 856 i = slap_str2ad("host", &nssov_pam_host_ad, &text); 857 if (i != LDAP_SUCCESS) { 858 Debug(LDAP_DEBUG_ANY,"nssov: host attr unknown: %s\n", 859 text, 0, 0 ); 860 return -1; 861 } 862 } 863 if ((ni->ni_pam_opts & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) && 864 !nssov_pam_svc_ad) 865 { 866 const char *text; 867 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text); 868 if (i != LDAP_SUCCESS) { 869 Debug(LDAP_DEBUG_ANY,"nssov: authorizedService attr unknown: %s\n", 870 text, 0, 0 ); 871 return -1; 872 } 873 } 874 if ( slapMode & SLAP_SERVER_MODE ) { 875 /* make sure /var/run/nslcd exists */ 876 if (mkdir(NSLCD_PATH, (mode_t) 0555)) { 877 Debug(LDAP_DEBUG_TRACE,"nssov: mkdir(%s) failed (ignored): %s\n", 878 NSLCD_PATH,strerror(errno),0); 879 } else { 880 Debug(LDAP_DEBUG_TRACE,"nssov: created %s\n",NSLCD_PATH,0,0); 881 } 882 883 /* create a socket */ 884 if ( (sock=socket(PF_UNIX,SOCK_STREAM,0))<0 ) 885 { 886 Debug(LDAP_DEBUG_ANY,"nssov: cannot create socket: %s\n",strerror(errno),0,0); 887 return -1; 888 } 889 /* remove existing named socket */ 890 if (unlink(NSLCD_SOCKET)<0) 891 { 892 Debug( LDAP_DEBUG_TRACE,"nssov: unlink() of "NSLCD_SOCKET" failed (ignored): %s\n", 893 strerror(errno),0,0); 894 } 895 /* create socket address structure */ 896 memset(&addr,0,sizeof(struct sockaddr_un)); 897 addr.sun_family=AF_UNIX; 898 strncpy(addr.sun_path,NSLCD_SOCKET,sizeof(addr.sun_path)); 899 addr.sun_path[sizeof(addr.sun_path)-1]='\0'; 900 /* bind to the named socket */ 901 if (bind(sock,(struct sockaddr *)&addr,sizeof(struct sockaddr_un))) 902 { 903 Debug( LDAP_DEBUG_ANY,"nssov: bind() to "NSLCD_SOCKET" failed: %s", 904 strerror(errno),0,0); 905 if (close(sock)) 906 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 907 return -1; 908 } 909 /* close the file descriptor on exit */ 910 if (fcntl(sock,F_SETFD,FD_CLOEXEC)<0) 911 { 912 Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,O_NONBLOCK) failed: %s",strerror(errno),0,0); 913 if (close(sock)) 914 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 915 return -1; 916 } 917 /* set permissions of socket so anybody can do requests */ 918 /* Note: we use chmod() here instead of fchmod() because 919 fchmod does not work on sockets 920 http://www.opengroup.org/onlinepubs/009695399/functions/fchmod.html 921 http://lkml.org/lkml/2005/5/16/11 */ 922 if (chmod(NSLCD_SOCKET,(mode_t)0666)) 923 { 924 Debug( LDAP_DEBUG_ANY,"nssov: chmod(0666) failed: %s",strerror(errno),0,0); 925 if (close(sock)) 926 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 927 return -1; 928 } 929 /* start listening for connections */ 930 if (listen(sock,SOMAXCONN)<0) 931 { 932 Debug( LDAP_DEBUG_ANY,"nssov: listen() failed: %s",strerror(errno),0,0); 933 if (close(sock)) 934 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 935 return -1; 936 } 937 ni->ni_socket = sock; 938 ni->ni_conn = connection_client_setup( sock, acceptconn, ni ); 939 } 940 941 return 0; 942 } 943 944 static int 945 nssov_db_close( 946 BackendDB *be, 947 ConfigReply *cr ) 948 { 949 slap_overinst *on = (slap_overinst *)be->bd_info; 950 nssov_info *ni = on->on_bi.bi_private; 951 952 if ( slapMode & SLAP_SERVER_MODE ) { 953 /* close socket if it's still in use */ 954 if (ni->ni_socket >= 0); 955 { 956 if (close(ni->ni_socket)) 957 Debug( LDAP_DEBUG_ANY,"problem closing server socket (ignored): %s",strerror(errno),0,0); 958 ni->ni_socket = -1; 959 } 960 /* remove existing named socket */ 961 if (unlink(NSLCD_SOCKET)<0) 962 { 963 Debug( LDAP_DEBUG_TRACE,"unlink() of "NSLCD_SOCKET" failed (ignored): %s", 964 strerror(errno),0,0); 965 } 966 } 967 } 968 969 static slap_overinst nssov; 970 971 int 972 nssov_initialize( void ) 973 { 974 int rc; 975 976 nssov.on_bi.bi_type = "nssov"; 977 nssov.on_bi.bi_db_init = nssov_db_init; 978 nssov.on_bi.bi_db_destroy = nssov_db_destroy; 979 nssov.on_bi.bi_db_open = nssov_db_open; 980 nssov.on_bi.bi_db_close = nssov_db_close; 981 982 nssov.on_bi.bi_cf_ocs = nssocs; 983 984 rc = config_register_schema( nsscfg, nssocs ); 985 if ( rc ) return rc; 986 987 return overlay_register(&nssov); 988 } 989 990 #if SLAPD_OVER_NSSOV == SLAPD_MOD_DYNAMIC 991 int 992 init_module( int argc, char *argv[] ) 993 { 994 return nssov_initialize(); 995 } 996 #endif 997