1 /* $NetBSD: nssov.c,v 1.2 2020/08/11 13:15:36 christos 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 2008-2020 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 void 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(fp,&ipv4addr,sizeof(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(fp,&ipv6addr,sizeof(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_INT32(fp,tmpint32); 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_INT32(fp,*action); 253 return 0; 254 } 255 256 int nssov_config(nssov_info *ni,TFILE *fp,Operation *op) 257 { 258 int opt; 259 int32_t tmpint32; 260 261 READ_INT32(fp,opt); 262 263 Debug(LDAP_DEBUG_TRACE, "nssov_config (%d)\n",opt,0,0); 264 265 WRITE_INT32(fp,NSLCD_VERSION); 266 WRITE_INT32(fp,NSLCD_ACTION_CONFIG_GET); 267 WRITE_INT32(fp,NSLCD_RESULT_BEGIN); 268 269 switch (opt) { 270 case NSLCD_CONFIG_PAM_PASSWORD_PROHIBIT_MESSAGE: 271 /* request for pam password_prohibit_message */ 272 /* nssov_pam prohibits password */ 273 if (!BER_BVISEMPTY(&ni->ni_pam_password_prohibit_message)) { 274 Debug(LDAP_DEBUG_TRACE,"nssov_config(): %s (%s)\n", 275 "password_prohibit_message", 276 ni->ni_pam_password_prohibit_message.bv_val,0); 277 WRITE_STRING(fp,ni->ni_pam_password_prohibit_message.bv_val); 278 } 279 default: 280 /* all other config options are ignored */ 281 break; 282 } 283 284 WRITE_INT32(fp,NSLCD_RESULT_END); 285 return 0; 286 } 287 288 289 /* read a request message, returns <0 in case of errors, 290 this function closes the socket */ 291 static void handleconnection(nssov_info *ni,int sock,Operation *op) 292 { 293 TFILE *fp; 294 int32_t action; 295 int readtimeout,writetimeout; 296 uid_t uid; 297 gid_t gid; 298 char authid[sizeof("gidNumber=4294967295+uidNumber=424967295,cn=peercred,cn=external,cn=auth")]; 299 char peerbuf[8]; 300 struct berval peerbv = { sizeof(peerbuf), peerbuf }; 301 302 /* log connection */ 303 if (LUTIL_GETPEEREID(sock,&uid,&gid,&peerbv)) 304 Debug( LDAP_DEBUG_TRACE,"nssov: connection from unknown client: %s\n",strerror(errno),0,0); 305 else 306 Debug( LDAP_DEBUG_TRACE,"nssov: connection from uid=%d gid=%d\n", 307 (int)uid,(int)gid,0); 308 309 /* Should do authid mapping too */ 310 op->o_dn.bv_len = sprintf(authid,"gidNumber=%d+uidNumber=%d,cn=peercred,cn=external,cn=auth", 311 (int)gid, (int)uid ); 312 op->o_dn.bv_val = authid; 313 op->o_ndn = op->o_dn; 314 315 /* set the timeouts: 316 * read timeout is half a second because clients should send their request 317 * quickly, write timeout is 60 seconds because clients could be taking some 318 * time to process the results 319 */ 320 readtimeout = 500; 321 writetimeout = 60000; 322 /* create a stream object */ 323 if ((fp=tio_fdopen(sock,readtimeout,writetimeout, 324 READBUFFER_MINSIZE,READBUFFER_MAXSIZE, 325 WRITEBUFFER_MINSIZE,WRITEBUFFER_MAXSIZE))==NULL) 326 { 327 Debug( LDAP_DEBUG_ANY,"nssov: cannot create stream for writing: %s",strerror(errno),0,0); 328 (void)close(sock); 329 return; 330 } 331 /* read request */ 332 if (read_header(fp,&action)) 333 { 334 (void)tio_close(fp); 335 return; 336 } 337 /* handle request */ 338 switch (action) 339 { 340 case NSLCD_ACTION_ALIAS_BYNAME: (void)nssov_alias_byname(ni,fp,op); break; 341 case NSLCD_ACTION_ALIAS_ALL: (void)nssov_alias_all(ni,fp,op); break; 342 case NSLCD_ACTION_ETHER_BYNAME: (void)nssov_ether_byname(ni,fp,op); break; 343 case NSLCD_ACTION_ETHER_BYETHER: (void)nssov_ether_byether(ni,fp,op); break; 344 case NSLCD_ACTION_ETHER_ALL: (void)nssov_ether_all(ni,fp,op); break; 345 case NSLCD_ACTION_GROUP_BYNAME: (void)nssov_group_byname(ni,fp,op); break; 346 case NSLCD_ACTION_GROUP_BYGID: (void)nssov_group_bygid(ni,fp,op); break; 347 case NSLCD_ACTION_GROUP_BYMEMBER: (void)nssov_group_bymember(ni,fp,op); break; 348 case NSLCD_ACTION_GROUP_ALL: (void)nssov_group_all(ni,fp,op); break; 349 case NSLCD_ACTION_HOST_BYNAME: (void)nssov_host_byname(ni,fp,op); break; 350 case NSLCD_ACTION_HOST_BYADDR: (void)nssov_host_byaddr(ni,fp,op); break; 351 case NSLCD_ACTION_HOST_ALL: (void)nssov_host_all(ni,fp,op); break; 352 case NSLCD_ACTION_NETGROUP_BYNAME: (void)nssov_netgroup_byname(ni,fp,op); break; 353 case NSLCD_ACTION_NETWORK_BYNAME: (void)nssov_network_byname(ni,fp,op); break; 354 case NSLCD_ACTION_NETWORK_BYADDR: (void)nssov_network_byaddr(ni,fp,op); break; 355 case NSLCD_ACTION_NETWORK_ALL: (void)nssov_network_all(ni,fp,op); break; 356 case NSLCD_ACTION_PASSWD_BYNAME: (void)nssov_passwd_byname(ni,fp,op); break; 357 case NSLCD_ACTION_PASSWD_BYUID: (void)nssov_passwd_byuid(ni,fp,op); break; 358 case NSLCD_ACTION_PASSWD_ALL: (void)nssov_passwd_all(ni,fp,op); break; 359 case NSLCD_ACTION_PROTOCOL_BYNAME: (void)nssov_protocol_byname(ni,fp,op); break; 360 case NSLCD_ACTION_PROTOCOL_BYNUMBER:(void)nssov_protocol_bynumber(ni,fp,op); break; 361 case NSLCD_ACTION_PROTOCOL_ALL: (void)nssov_protocol_all(ni,fp,op); break; 362 case NSLCD_ACTION_RPC_BYNAME: (void)nssov_rpc_byname(ni,fp,op); break; 363 case NSLCD_ACTION_RPC_BYNUMBER: (void)nssov_rpc_bynumber(ni,fp,op); break; 364 case NSLCD_ACTION_RPC_ALL: (void)nssov_rpc_all(ni,fp,op); break; 365 case NSLCD_ACTION_SERVICE_BYNAME: (void)nssov_service_byname(ni,fp,op); break; 366 case NSLCD_ACTION_SERVICE_BYNUMBER: (void)nssov_service_bynumber(ni,fp,op); break; 367 case NSLCD_ACTION_SERVICE_ALL: (void)nssov_service_all(ni,fp,op); break; 368 case NSLCD_ACTION_SHADOW_BYNAME: if (uid==0) (void)nssov_shadow_byname(ni,fp,op); break; 369 case NSLCD_ACTION_SHADOW_ALL: if (uid==0) (void)nssov_shadow_all(ni,fp,op); break; 370 case NSLCD_ACTION_PAM_AUTHC: (void)pam_authc(ni,fp,op,uid); break; 371 case NSLCD_ACTION_PAM_AUTHZ: (void)pam_authz(ni,fp,op); break; 372 case NSLCD_ACTION_PAM_SESS_O: if (uid==0) (void)pam_sess_o(ni,fp,op); break; 373 case NSLCD_ACTION_PAM_SESS_C: if (uid==0) (void)pam_sess_c(ni,fp,op); break; 374 case NSLCD_ACTION_PAM_PWMOD: (void)pam_pwmod(ni,fp,op,uid); break; 375 case NSLCD_ACTION_CONFIG_GET: (void)nssov_config(ni,fp,op); break; 376 default: 377 Debug( LDAP_DEBUG_ANY,"nssov: invalid request id: %d",(int)action,0,0); 378 break; 379 } 380 /* we're done with the request */ 381 (void)tio_close(fp); 382 return; 383 } 384 385 /* accept a connection on the socket */ 386 static void *acceptconn(void *ctx, void *arg) 387 { 388 nssov_info *ni = arg; 389 Connection conn = {0}; 390 OperationBuffer opbuf; 391 Operation *op; 392 int csock; 393 394 if ( slapd_shutdown ) 395 return NULL; 396 397 { 398 struct sockaddr_storage addr; 399 socklen_t alen; 400 int j; 401 402 /* accept a new connection */ 403 alen=(socklen_t)sizeof(struct sockaddr_storage); 404 csock=accept(ni->ni_socket,(struct sockaddr *)&addr,&alen); 405 connection_client_enable(ni->ni_conn); 406 if (csock<0) 407 { 408 if ((errno==EINTR)||(errno==EAGAIN)||(errno==EWOULDBLOCK)) 409 { 410 Debug( LDAP_DEBUG_TRACE,"nssov: accept() failed (ignored): %s",strerror(errno),0,0); 411 return NULL; 412 } 413 Debug( LDAP_DEBUG_ANY,"nssov: accept() failed: %s",strerror(errno),0,0); 414 return NULL; 415 } 416 /* make sure O_NONBLOCK is not inherited */ 417 if ((j=fcntl(csock,F_GETFL,0))<0) 418 { 419 Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_GETFL) failed: %s",strerror(errno),0,0); 420 if (close(csock)) 421 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 422 return NULL; 423 } 424 if (fcntl(csock,F_SETFL,j&~O_NONBLOCK)<0) 425 { 426 Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,~O_NONBLOCK) failed: %s",strerror(errno),0,0); 427 if (close(csock)) 428 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 429 return NULL; 430 } 431 } 432 connection_fake_init( &conn, &opbuf, ctx ); 433 op=&opbuf.ob_op; 434 conn.c_ssf = conn.c_transport_ssf = local_ssf; 435 op->o_bd = ni->ni_db; 436 op->o_tag = LDAP_REQ_SEARCH; 437 438 /* handle the connection */ 439 handleconnection(ni,csock,op); 440 441 return NULL; 442 } 443 444 static slap_verbmasks nss_svcs[] = { 445 { BER_BVC("aliases"), NM_alias }, 446 { BER_BVC("ethers"), NM_ether }, 447 { BER_BVC("group"), NM_group }, 448 { BER_BVC("hosts"), NM_host }, 449 { BER_BVC("netgroup"), NM_netgroup }, 450 { BER_BVC("networks"), NM_network }, 451 { BER_BVC("passwd"), NM_passwd }, 452 { BER_BVC("protocols"), NM_protocol }, 453 { BER_BVC("rpc"), NM_rpc }, 454 { BER_BVC("services"), NM_service }, 455 { BER_BVC("shadow"), NM_shadow }, 456 { BER_BVNULL, 0 } 457 }; 458 459 static slap_verbmasks pam_opts[] = { 460 { BER_BVC("userhost"), NI_PAM_USERHOST }, 461 { BER_BVC("userservice"), NI_PAM_USERSVC }, 462 { BER_BVC("usergroup"), NI_PAM_USERGRP }, 463 { BER_BVC("hostservice"), NI_PAM_HOSTSVC }, 464 { BER_BVC("authz2dn"), NI_PAM_SASL2DN }, 465 { BER_BVC("uid2dn"), NI_PAM_UID2DN }, 466 { BER_BVNULL, 0 } 467 }; 468 469 enum { 470 NSS_SSD=1, 471 NSS_MAP, 472 NSS_PAM, 473 NSS_PAMGROUP, 474 NSS_PAMSESS 475 }; 476 477 static ConfigDriver nss_cf_gen; 478 479 static ConfigTable nsscfg[] = { 480 { "nssov-ssd", "service> <url", 3, 3, 0, ARG_MAGIC|NSS_SSD, 481 nss_cf_gen, "(OLcfgCtAt:3.1 NAME 'olcNssSsd' " 482 "DESC 'URL for searches in a given service' " 483 "EQUALITY caseIgnoreMatch " 484 "SYNTAX OMsDirectoryString )", NULL, NULL }, 485 { "nssov-map", "service> <orig> <new", 4, 4, 0, ARG_MAGIC|NSS_MAP, 486 nss_cf_gen, "(OLcfgCtAt:3.2 NAME 'olcNssMap' " 487 "DESC 'Map <service> lookups of <orig> attr to <new> attr' " 488 "EQUALITY caseIgnoreMatch " 489 "SYNTAX OMsDirectoryString )", NULL, NULL }, 490 { "nssov-pam", "options", 2, 0, 0, ARG_MAGIC|NSS_PAM, 491 nss_cf_gen, "(OLcfgCtAt:3.3 NAME 'olcNssPam' " 492 "DESC 'PAM authentication and authorization options' " 493 "EQUALITY caseIgnoreMatch " 494 "SYNTAX OMsDirectoryString )", NULL, NULL }, 495 { "nssov-pam-defhost", "hostname", 2, 2, 0, ARG_OFFSET|ARG_BERVAL, 496 (void *)offsetof(struct nssov_info, ni_pam_defhost), 497 "(OLcfgCtAt:3.4 NAME 'olcNssPamDefHost' " 498 "DESC 'Default hostname for service checks' " 499 "EQUALITY caseIgnoreMatch " 500 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 501 { "nssov-pam-group-dn", "DN", 2, 2, 0, ARG_MAGIC|ARG_DN|NSS_PAMGROUP, 502 nss_cf_gen, "(OLcfgCtAt:3.5 NAME 'olcNssPamGroupDN' " 503 "DESC 'DN of group in which membership is required' " 504 "EQUALITY distinguishedNameMatch " 505 "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL }, 506 { "nssov-pam-group-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC, 507 (void *)offsetof(struct nssov_info, ni_pam_group_ad), 508 "(OLcfgCtAt:3.6 NAME 'olcNssPamGroupAD' " 509 "DESC 'Member attribute to use for group check' " 510 "EQUALITY caseIgnoreMatch " 511 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 512 { "nssov-pam-min-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT, 513 (void *)offsetof(struct nssov_info, ni_pam_min_uid), 514 "(OLcfgCtAt:3.7 NAME 'olcNssPamMinUid' " 515 "DESC 'Minimum UID allowed to login' " 516 "EQUALITY integerMatch " 517 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, 518 { "nssov-pam-max-uid", "uid", 2, 2, 0, ARG_OFFSET|ARG_INT, 519 (void *)offsetof(struct nssov_info, ni_pam_max_uid), 520 "(OLcfgCtAt:3.8 NAME 'olcNssPamMaxUid' " 521 "DESC 'Maximum UID allowed to login' " 522 "EQUALITY integerMatch " 523 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, 524 { "nssov-pam-template-ad", "attr", 2, 2, 0, ARG_OFFSET|ARG_ATDESC, 525 (void *)offsetof(struct nssov_info, ni_pam_template_ad), 526 "(OLcfgCtAt:3.9 NAME 'olcNssPamTemplateAD' " 527 "DESC 'Attribute to use for template login name' " 528 "EQUALITY caseIgnoreMatch " 529 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 530 { "nssov-pam-template", "name", 2, 2, 0, ARG_OFFSET|ARG_BERVAL, 531 (void *)offsetof(struct nssov_info, ni_pam_template), 532 "(OLcfgCtAt:3.10 NAME 'olcNssPamTemplate' " 533 "DESC 'Default template login name' " 534 "EQUALITY caseIgnoreMatch " 535 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 536 { "nssov-pam-session", "service", 2, 2, 0, ARG_MAGIC|NSS_PAMSESS, 537 nss_cf_gen, "(OLcfgCtAt:3.11 NAME 'olcNssPamSession' " 538 "DESC 'Services for which sessions will be recorded' " 539 "EQUALITY caseIgnoreMatch " 540 "SYNTAX OMsDirectoryString )", NULL, NULL }, 541 { "nssov-pam-password-prohibit-message", 542 "password_prohibit_message", 2, 2, 0, 543 ARG_OFFSET|ARG_BERVAL, 544 (void *)offsetof(struct nssov_info, ni_pam_password_prohibit_message), 545 "(OLcfgCtAt:3.12 NAME 'olcNssPamPwdProhibitMsg' " 546 "DESC 'Prohibit password modification message' " 547 "EQUALITY caseIgnoreMatch " 548 "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, 549 { "nssov-pam-pwdmgr-dn", 550 "pwdmgr_dn", 2, 2, 0, 551 ARG_OFFSET|ARG_BERVAL, 552 (void *)offsetof(struct nssov_info, ni_pam_pwdmgr_dn), 553 "(OLcfgCtAt:3.13 NAME 'olcPamPwdmgrDn' " 554 "DESC 'Password Manager DN' " 555 "EQUALITY distinguishedNameMatch " 556 "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL }, 557 { "nssov-pam-pwdmgr-pwd", 558 "pwdmgr_pwd", 2, 2, 0, 559 ARG_OFFSET|ARG_BERVAL, 560 (void *)offsetof(struct nssov_info, ni_pam_pwdmgr_pwd), 561 "(OLcfgCtAt:3.14 NAME 'olcPamPwdmgrPwd' " 562 "DESC 'Password Manager Pwd' " 563 "EQUALITY octetStringMatch " 564 "SYNTAX OMsOctetString SINGLE-VALUE )", NULL, NULL }, 565 { NULL, NULL, 0,0,0, ARG_IGNORED } 566 }; 567 568 static ConfigOCs nssocs[] = { 569 { "( OLcfgCtOc:3.1 " 570 "NAME 'olcNssOvConfig' " 571 "DESC 'NSS lookup configuration' " 572 "SUP olcOverlayConfig " 573 "MAY ( olcNssSsd $ olcNssMap $ olcNssPam $ olcNssPamDefHost $ " 574 "olcNssPamGroupDN $ olcNssPamGroupAD $ " 575 "olcNssPamMinUid $ olcNssPamMaxUid $ olcNssPamSession $ " 576 "olcNssPamTemplateAD $ olcNssPamTemplate ) )", 577 Cft_Overlay, nsscfg }, 578 { NULL, 0, NULL } 579 }; 580 581 static int 582 nss_cf_gen(ConfigArgs *c) 583 { 584 slap_overinst *on = (slap_overinst *)c->bi; 585 nssov_info *ni = on->on_bi.bi_private; 586 nssov_mapinfo *mi; 587 int i, j, rc = 0; 588 slap_mask_t m; 589 590 if ( c->op == SLAP_CONFIG_EMIT ) { 591 switch(c->type) { 592 case NSS_SSD: 593 rc = 1; 594 for (i=NM_alias;i<NM_NONE;i++) { 595 struct berval scope; 596 struct berval ssd; 597 struct berval base; 598 599 mi = &ni->ni_maps[i]; 600 601 /* ignore all-default services */ 602 if ( mi->mi_scope == LDAP_SCOPE_DEFAULT && 603 bvmatch( &mi->mi_filter, &mi->mi_filter0 ) && 604 BER_BVISNULL( &mi->mi_base )) 605 continue; 606 607 if ( BER_BVISNULL( &mi->mi_base )) 608 base = ni->ni_db->be_nsuffix[0]; 609 else 610 base = mi->mi_base; 611 ldap_pvt_scope2bv(mi->mi_scope == LDAP_SCOPE_DEFAULT ? 612 LDAP_SCOPE_SUBTREE : mi->mi_scope, &scope); 613 ssd.bv_len = STRLENOF(" ldap:///???") + nss_svcs[i].word.bv_len + 614 base.bv_len + scope.bv_len + mi->mi_filter.bv_len; 615 ssd.bv_val = ch_malloc( ssd.bv_len + 1 ); 616 sprintf(ssd.bv_val, "%s ldap:///%s??%s?%s", nss_svcs[i].word.bv_val, 617 base.bv_val, scope.bv_val, mi->mi_filter.bv_val ); 618 ber_bvarray_add( &c->rvalue_vals, &ssd ); 619 rc = 0; 620 } 621 break; 622 case NSS_MAP: 623 rc = 1; 624 for (i=NM_alias;i<NM_NONE;i++) { 625 626 mi = &ni->ni_maps[i]; 627 for (j=0;!BER_BVISNULL(&mi->mi_attrkeys[j]);j++) { 628 if ( ber_bvstrcasecmp(&mi->mi_attrkeys[j], 629 &mi->mi_attrs[j].an_name)) { 630 struct berval map; 631 632 map.bv_len = nss_svcs[i].word.bv_len + 633 mi->mi_attrkeys[j].bv_len + 634 mi->mi_attrs[j].an_desc->ad_cname.bv_len + 2; 635 map.bv_val = ch_malloc(map.bv_len + 1); 636 sprintf(map.bv_val, "%s %s %s", nss_svcs[i].word.bv_val, 637 mi->mi_attrkeys[j].bv_val, mi->mi_attrs[j].an_desc->ad_cname.bv_val ); 638 ber_bvarray_add( &c->rvalue_vals, &map ); 639 rc = 0; 640 } 641 } 642 } 643 break; 644 case NSS_PAM: 645 rc = mask_to_verbs( pam_opts, ni->ni_pam_opts, &c->rvalue_vals ); 646 break; 647 case NSS_PAMGROUP: 648 if (!BER_BVISEMPTY( &ni->ni_pam_group_dn )) { 649 value_add_one( &c->rvalue_vals, &ni->ni_pam_group_dn ); 650 value_add_one( &c->rvalue_nvals, &ni->ni_pam_group_dn ); 651 } else { 652 rc = 1; 653 } 654 break; 655 case NSS_PAMSESS: 656 if (ni->ni_pam_sessions) { 657 ber_bvarray_dup_x( &c->rvalue_vals, ni->ni_pam_sessions, NULL ); 658 } else { 659 rc = 1; 660 } 661 break; 662 } 663 return rc; 664 } else if ( c->op == LDAP_MOD_DELETE ) { 665 /* FIXME */ 666 return 1; 667 } 668 switch( c->type ) { 669 case NSS_SSD: { 670 LDAPURLDesc *lud; 671 672 i = verb_to_mask(c->argv[1], nss_svcs); 673 if ( i == NM_NONE ) 674 return 1; 675 676 mi = &ni->ni_maps[i]; 677 rc = ldap_url_parse(c->argv[2], &lud); 678 if ( rc ) 679 return 1; 680 do { 681 struct berval base; 682 /* Must be LDAP scheme */ 683 if (strcasecmp(lud->lud_scheme,"ldap")) { 684 rc = 1; 685 break; 686 } 687 /* Host part, attrs, and extensions must be empty */ 688 if (( lud->lud_host && *lud->lud_host ) || 689 lud->lud_attrs || lud->lud_exts ) { 690 rc = 1; 691 break; 692 } 693 ber_str2bv( lud->lud_dn,0,0,&base); 694 rc = dnNormalize( 0,NULL,NULL,&base,&mi->mi_base,NULL); 695 if ( rc ) 696 break; 697 if ( lud->lud_filter ) { 698 /* steal this */ 699 ber_str2bv( lud->lud_filter,0,0,&mi->mi_filter); 700 lud->lud_filter = NULL; 701 } 702 mi->mi_scope = lud->lud_scope; 703 } while(0); 704 ldap_free_urldesc( lud ); 705 } 706 break; 707 case NSS_MAP: 708 i = verb_to_mask(c->argv[1], nss_svcs); 709 if ( i == NM_NONE ) 710 return 1; 711 rc = 1; 712 mi = &ni->ni_maps[i]; 713 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) { 714 if (!strcasecmp(c->argv[2],mi->mi_attrkeys[j].bv_val)) { 715 AttributeDescription *ad = NULL; 716 const char *text; 717 rc = slap_str2ad( c->argv[3], &ad, &text); 718 if ( rc == 0 ) { 719 mi->mi_attrs[j].an_desc = ad; 720 mi->mi_attrs[j].an_name = ad->ad_cname; 721 } 722 break; 723 } 724 } 725 break; 726 case NSS_PAM: 727 m = ni->ni_pam_opts; 728 i = verbs_to_mask(c->argc, c->argv, pam_opts, &m); 729 if (i == 0) { 730 ni->ni_pam_opts = m; 731 if ((m & NI_PAM_USERHOST) && !nssov_pam_host_ad) { 732 const char *text; 733 i = slap_str2ad("host", &nssov_pam_host_ad, &text); 734 if (i != LDAP_SUCCESS) { 735 snprintf(c->cr_msg, sizeof(c->cr_msg), 736 "nssov: host attr unknown: %s", text); 737 Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0); 738 rc = 1; 739 break; 740 } 741 } 742 if ((m & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) && !nssov_pam_svc_ad) { 743 const char *text; 744 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text); 745 if (i != LDAP_SUCCESS) { 746 snprintf(c->cr_msg, sizeof(c->cr_msg), 747 "nssov: authorizedService attr unknown: %s", text); 748 Debug(LDAP_DEBUG_ANY,"%s\n",c->cr_msg,0,0); 749 rc = 1; 750 break; 751 } 752 } 753 } else { 754 rc = 1; 755 } 756 break; 757 case NSS_PAMGROUP: 758 ni->ni_pam_group_dn = c->value_ndn; 759 ch_free( c->value_dn.bv_val ); 760 break; 761 case NSS_PAMSESS: 762 ber_str2bv( c->argv[1], 0, 1, &c->value_bv ); 763 ber_bvarray_add( &ni->ni_pam_sessions, &c->value_bv ); 764 break; 765 } 766 return rc; 767 } 768 769 static int 770 nssov_db_init( 771 BackendDB *be, 772 ConfigReply *cr ) 773 { 774 slap_overinst *on = (slap_overinst *)be->bd_info; 775 nssov_info *ni; 776 int rc; 777 778 rc = nssov_pam_init(); 779 if (rc) return rc; 780 781 ni = ch_calloc( 1, sizeof(nssov_info) ); 782 on->on_bi.bi_private = ni; 783 784 /* set up map keys */ 785 nssov_alias_init(ni); 786 nssov_ether_init(ni); 787 nssov_group_init(ni); 788 nssov_host_init(ni); 789 nssov_netgroup_init(ni); 790 nssov_network_init(ni); 791 nssov_passwd_init(ni); 792 nssov_protocol_init(ni); 793 nssov_rpc_init(ni); 794 nssov_service_init(ni); 795 nssov_shadow_init(ni); 796 797 ni->ni_db = be->bd_self; 798 ni->ni_pam_opts = NI_PAM_UID2DN; 799 800 return 0; 801 } 802 803 static int 804 nssov_db_destroy( 805 BackendDB *be, 806 ConfigReply *cr ) 807 { 808 return 0; 809 } 810 811 static int 812 nssov_db_open( 813 BackendDB *be, 814 ConfigReply *cr ) 815 { 816 slap_overinst *on = (slap_overinst *)be->bd_info; 817 nssov_info *ni = on->on_bi.bi_private; 818 nssov_mapinfo *mi; 819 820 int i, sock; 821 struct sockaddr_un addr; 822 823 /* Set default bases */ 824 for (i=0; i<NM_NONE; i++) { 825 if ( BER_BVISNULL( &ni->ni_maps[i].mi_base )) { 826 ber_dupbv( &ni->ni_maps[i].mi_base, &be->be_nsuffix[0] ); 827 } 828 if ( ni->ni_maps[i].mi_scope == LDAP_SCOPE_DEFAULT ) 829 ni->ni_maps[i].mi_scope = LDAP_SCOPE_SUBTREE; 830 } 831 /* validate attribute maps */ 832 mi = ni->ni_maps; 833 for ( i=0; i<NM_NONE; i++,mi++) { 834 const char *text; 835 int j; 836 for (j=0; !BER_BVISNULL(&mi->mi_attrkeys[j]); j++) { 837 /* skip attrs we already validated */ 838 if ( mi->mi_attrs[j].an_desc ) continue; 839 if ( slap_bv2ad( &mi->mi_attrs[j].an_name, 840 &mi->mi_attrs[j].an_desc, &text )) { 841 Debug(LDAP_DEBUG_ANY,"nssov: invalid attr \"%s\": %s\n", 842 mi->mi_attrs[j].an_name.bv_val, text, 0 ); 843 return -1; 844 } 845 } 846 BER_BVZERO(&mi->mi_attrs[j].an_name); 847 mi->mi_attrs[j].an_desc = NULL; 848 } 849 850 /* Find host and authorizedService definitions */ 851 if ((ni->ni_pam_opts & NI_PAM_USERHOST) && !nssov_pam_host_ad) 852 { 853 const char *text; 854 i = slap_str2ad("host", &nssov_pam_host_ad, &text); 855 if (i != LDAP_SUCCESS) { 856 Debug(LDAP_DEBUG_ANY,"nssov: host attr unknown: %s\n", 857 text, 0, 0 ); 858 return -1; 859 } 860 } 861 if ((ni->ni_pam_opts & (NI_PAM_USERSVC|NI_PAM_HOSTSVC)) && 862 !nssov_pam_svc_ad) 863 { 864 const char *text; 865 i = slap_str2ad("authorizedService", &nssov_pam_svc_ad, &text); 866 if (i != LDAP_SUCCESS) { 867 Debug(LDAP_DEBUG_ANY,"nssov: authorizedService attr unknown: %s\n", 868 text, 0, 0 ); 869 return -1; 870 } 871 } 872 if ( slapMode & SLAP_SERVER_MODE ) { 873 /* make sure /var/run/nslcd exists */ 874 if (mkdir(NSLCD_PATH, (mode_t) 0555)) { 875 Debug(LDAP_DEBUG_TRACE,"nssov: mkdir(%s) failed (ignored): %s\n", 876 NSLCD_PATH,strerror(errno),0); 877 } else { 878 Debug(LDAP_DEBUG_TRACE,"nssov: created %s\n",NSLCD_PATH,0,0); 879 } 880 881 /* create a socket */ 882 if ( (sock=socket(PF_UNIX,SOCK_STREAM,0))<0 ) 883 { 884 Debug(LDAP_DEBUG_ANY,"nssov: cannot create socket: %s\n",strerror(errno),0,0); 885 return -1; 886 } 887 /* remove existing named socket */ 888 if (unlink(NSLCD_SOCKET)<0) 889 { 890 Debug( LDAP_DEBUG_TRACE,"nssov: unlink() of "NSLCD_SOCKET" failed (ignored): %s\n", 891 strerror(errno),0,0); 892 } 893 /* create socket address structure */ 894 memset(&addr,0,sizeof(struct sockaddr_un)); 895 addr.sun_family=AF_UNIX; 896 strncpy(addr.sun_path,NSLCD_SOCKET,sizeof(addr.sun_path)); 897 addr.sun_path[sizeof(addr.sun_path)-1]='\0'; 898 /* bind to the named socket */ 899 if (bind(sock,(struct sockaddr *)&addr,sizeof(struct sockaddr_un))) 900 { 901 Debug( LDAP_DEBUG_ANY,"nssov: bind() to "NSLCD_SOCKET" failed: %s", 902 strerror(errno),0,0); 903 if (close(sock)) 904 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 905 return -1; 906 } 907 /* close the file descriptor on exit */ 908 if (fcntl(sock,F_SETFD,FD_CLOEXEC)<0) 909 { 910 Debug( LDAP_DEBUG_ANY,"nssov: fcntl(F_SETFL,O_NONBLOCK) failed: %s",strerror(errno),0,0); 911 if (close(sock)) 912 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 913 return -1; 914 } 915 /* set permissions of socket so anybody can do requests */ 916 /* Note: we use chmod() here instead of fchmod() because 917 fchmod does not work on sockets 918 http://www.opengroup.org/onlinepubs/009695399/functions/fchmod.html 919 http://lkml.org/lkml/2005/5/16/11 */ 920 if (chmod(NSLCD_SOCKET,(mode_t)0666)) 921 { 922 Debug( LDAP_DEBUG_ANY,"nssov: chmod(0666) failed: %s",strerror(errno),0,0); 923 if (close(sock)) 924 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 925 return -1; 926 } 927 /* start listening for connections */ 928 if (listen(sock,SOMAXCONN)<0) 929 { 930 Debug( LDAP_DEBUG_ANY,"nssov: listen() failed: %s",strerror(errno),0,0); 931 if (close(sock)) 932 Debug( LDAP_DEBUG_ANY,"nssov: problem closing socket: %s",strerror(errno),0,0); 933 return -1; 934 } 935 ni->ni_socket = sock; 936 ni->ni_conn = connection_client_setup( sock, acceptconn, ni ); 937 } 938 939 return 0; 940 } 941 942 static int 943 nssov_db_close( 944 BackendDB *be, 945 ConfigReply *cr ) 946 { 947 slap_overinst *on = (slap_overinst *)be->bd_info; 948 nssov_info *ni = on->on_bi.bi_private; 949 950 if ( slapMode & SLAP_SERVER_MODE ) { 951 /* close socket if it's still in use */ 952 if (ni->ni_socket >= 0); 953 { 954 if (close(ni->ni_socket)) 955 Debug( LDAP_DEBUG_ANY,"problem closing server socket (ignored): %s",strerror(errno),0,0); 956 ni->ni_socket = -1; 957 } 958 /* remove existing named socket */ 959 if (unlink(NSLCD_SOCKET)<0) 960 { 961 Debug( LDAP_DEBUG_TRACE,"unlink() of "NSLCD_SOCKET" failed (ignored): %s", 962 strerror(errno),0,0); 963 } 964 } 965 return 0; 966 } 967 968 static slap_overinst nssov; 969 970 int 971 nssov_initialize( void ) 972 { 973 int rc; 974 975 nssov.on_bi.bi_type = "nssov"; 976 nssov.on_bi.bi_db_init = nssov_db_init; 977 nssov.on_bi.bi_db_destroy = nssov_db_destroy; 978 nssov.on_bi.bi_db_open = nssov_db_open; 979 nssov.on_bi.bi_db_close = nssov_db_close; 980 981 nssov.on_bi.bi_cf_ocs = nssocs; 982 983 rc = config_register_schema( nsscfg, nssocs ); 984 if ( rc ) return rc; 985 986 return overlay_register(&nssov); 987 } 988 989 #if SLAPD_OVER_NSSOV == SLAPD_MOD_DYNAMIC 990 int 991 init_module( int argc, char *argv[] ) 992 { 993 return nssov_initialize(); 994 } 995 #endif 996