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259
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1 /* LDAP client interface for XEmacs.
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265
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2 Copyright (C) 1998 Free Software Foundation, Inc.
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259
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 /* Author: Oscar Figueiredo */
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24
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25 /* This file provides lisp primitives for access to an LDAP library
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26 conforming to the API defined in RFC 1823.
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27 It has been tested with:
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28 - UMich LDAP 3.3 (http://www.umich.edu/~dirsvcs/ldap/)
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29 - Netscape's LDAP SDK 1.0 (http://developer.netscape.com) */
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30
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31
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32 #include <config.h>
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33 #include "lisp.h"
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34
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265
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35 #include <errno.h>
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259
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36 #include <lber.h>
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37 #include <ldap.h>
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38
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39 #ifdef HAVE_NS_LDAP
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40 #define HAVE_LDAP_SET_OPTION 1
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41 #define HAVE_LDAP_GET_ERRNO 1
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42 #else
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43 #undef HAVE_LDAP_SET_OPTION
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44 #undef HAVE_LDAP_GET_ERRNO
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45 #endif
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46
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47 static Lisp_Object Vldap_default_base;
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48 static Lisp_Object Vldap_default_host;
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49
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50 /* ldap-search-internal plist keywords */
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51 static Lisp_Object Qhost, Qfilter, Qattributes, Qattrsonly, Qbase, Qscope,
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52 Qauth, Qbinddn, Qpasswd, Qderef, Qtimelimit, Qsizelimit;
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53 /* Search scope limits */
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54 static Lisp_Object Qbase, Qonelevel, Qsubtree;
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55 /* Authentication methods */
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56 #ifdef LDAP_AUTH_KRBV41
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57 static Lisp_Object Qkrbv41;
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58 #endif
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59 #ifdef LDAP_AUTH_KRBV42
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60 static Lisp_Object Qkrbv42;
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61 #endif
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62 /* Deref policy */
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261
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63 static Lisp_Object Qnever, Qalways, Qfind;
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259
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64
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65 DEFUN ("ldap-search-internal", Fldap_search_internal, 1, 1, 0, /*
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66 Perform a search on a LDAP server.
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67 SEARCH-PLIST is a property list describing the search request.
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68 Valid keys in that list are:
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69 `host' is a string naming one or more (blank separated) LDAP servers to
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70 to try to connect to. Each host name may optionally be of the form host:port.
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71 `filter' is a filter string for the search as described in RFC 1558
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72 `attributes' is a list of strings indicating which attributes to retrieve
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73 for each matching entry. If nil return all available attributes.
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74 `attrsonly' if non-nil indicates that only the attributes are retrieved, not
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75 the associated values.
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76 `base' is the base for the search as described in RFC 1779.
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77 `scope' is one of the three symbols `subtree', `base' or `onelevel'.
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78 `auth' is the authentication method to use, possible values depend on
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79 the LDAP library XEmacs was compiled with: `simple', `krbv41' and `krbv42'.
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80 `binddn' is the distinguished name of the user to bind as (in RFC 1779 syntax).
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81 `passwd' is the password to use for simple authentication.
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82 `deref' is one of the symbols `never', `always', `search' or `find'.
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83 `timelimit' is the timeout limit for the connection in seconds.
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84 `sizelimit' is the maximum number of matches to return.
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85 The function returns a list of matching entries. Each entry is itself
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86 an alist of attribute/values.
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87 */
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88 (search_plist))
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89 {
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90 /* This function calls lisp */
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91
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92 /* Vars for query */
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93 LDAP *ld;
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94 LDAPMessage *res, *e;
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95 BerElement *ptr;
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96 char *a;
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97 int i, rc, err;
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98
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99 char *ldap_host = NULL;
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100 char *ldap_filter = NULL;
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101 char **ldap_attributes = NULL;
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102 int ldap_attrsonly = 0;
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103 char *ldap_base = NULL;
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104 int ldap_scope = LDAP_SCOPE_SUBTREE;
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105 int ldap_auth = LDAP_AUTH_SIMPLE;
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106 char *ldap_binddn = NULL;
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107 char *ldap_passwd = NULL;
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108 int ldap_deref = LDAP_DEREF_NEVER;
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109 int ldap_timelimit = 0;
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110 int ldap_sizelimit = 0;
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111
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112 char **vals = NULL;
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113 int matches;
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114
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115 Lisp_Object list, entry, result, keyword, value;
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116 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5;
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117
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118 list = entry = result = keyword = value = Qnil;
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119 GCPRO5 (list, entry, result, keyword, value);
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120
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121
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122 EXTERNAL_PROPERTY_LIST_LOOP(list, keyword, value, search_plist)
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123 {
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124 /* Host */
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125 if (EQ (keyword, Qhost))
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126 {
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127 CHECK_STRING (value);
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128 ldap_host = alloca (XSTRING_LENGTH (value) + 1);
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129 strcpy (ldap_host, (char *)XSTRING_DATA (value));
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130 }
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131 /* Filter */
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132 else if (EQ (keyword, Qfilter))
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133 {
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134 CHECK_STRING (value);
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135 ldap_filter = alloca (XSTRING_LENGTH (value) + 1);
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136 strcpy (ldap_filter, (char *)XSTRING_DATA (value));
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137 }
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138 /* Attributes */
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139 else if (EQ (keyword, Qattributes))
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140 {
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141 if (! NILP (value))
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142 {
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143 Lisp_Object attr_left = value;
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144 struct gcpro ngcpro1;
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145
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146 NGCPRO1 (attr_left);
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147 CHECK_CONS (value);
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148
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149 ldap_attributes = alloca ((XINT (Flength (value)) + 1)*sizeof (char *));
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150
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151 for (i=0; !NILP (attr_left); i++) {
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152 CHECK_STRING (XCAR (attr_left));
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153 ldap_attributes[i] = alloca (XSTRING_LENGTH (XCAR (attr_left)) + 1);
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154 strcpy(ldap_attributes[i],
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155 (char *)(XSTRING_DATA( XCAR (attr_left))));
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156 attr_left = XCDR (attr_left);
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157 }
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158 ldap_attributes[i] = NULL;
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159 NUNGCPRO;
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160 }
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161 }
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162 /* Attributes Only */
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163 else if (EQ (keyword, Qattrsonly))
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164 {
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165 CHECK_SYMBOL (value);
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166 ldap_attrsonly = NILP (value) ? 0 : 1;
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167 }
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168 /* Base */
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169 else if (EQ (keyword, Qbase))
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170 {
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171 if (!NILP (value))
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172 {
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173 CHECK_STRING (value);
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174 ldap_base = alloca (XSTRING_LENGTH (value) + 1);
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175 strcpy (ldap_base, (char *)XSTRING_DATA (value));
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176 }
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177 }
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178 /* Scope */
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179 else if (EQ (keyword, Qscope))
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180 {
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181 CHECK_SYMBOL (value);
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182
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183 if (EQ (value, Qbase))
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184 ldap_scope = LDAP_SCOPE_BASE;
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185 else if (EQ (value, Qonelevel))
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186 ldap_scope = LDAP_SCOPE_ONELEVEL;
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187 else if (EQ (value, Qsubtree))
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188 ldap_scope = LDAP_SCOPE_SUBTREE;
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189 else
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190 signal_simple_error ("Invalid scope", value);
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191 }
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192 /* Authentication method */
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193 else if (EQ (keyword, Qauth))
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194 {
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195 CHECK_SYMBOL (value);
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196
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197 if (EQ (value, Qsimple))
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198 ldap_auth = LDAP_AUTH_SIMPLE;
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199 #ifdef LDAP_AUTH_KRBV41
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200 else if (EQ (value, Qkrbv41))
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201 ldap_auth = LDAP_AUTH_KRBV41;
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202 #endif
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203 #ifdef LDAP_AUTH_KRBV42
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204 else if (EQ (value, Qkrbv42))
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205 ldap_auth = LDAP_AUTH_KRBV42;
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206 #endif
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207 else
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208 signal_simple_error ("Invalid authentication method", value);
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209 }
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210 /* Bind DN */
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211 else if (EQ (keyword, Qbinddn))
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212 {
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213 if (!NILP (value))
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214 {
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215 CHECK_STRING (value);
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216 ldap_binddn = alloca (XSTRING_LENGTH (value) + 1);
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217 strcpy (ldap_binddn, (char *)XSTRING_DATA (value));
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218 }
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219 }
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220 /* Password */
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221 else if (EQ (keyword, Qpasswd))
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222 {
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223 if (!NILP (value))
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224 {
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225 CHECK_STRING (value);
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226 ldap_passwd = alloca (XSTRING_LENGTH (value) + 1);
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227 strcpy (ldap_passwd, (char *)XSTRING_DATA (value));
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228 }
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229 }
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230 /* Deref */
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231 else if (EQ (keyword, Qderef))
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232 {
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233 CHECK_SYMBOL (value);
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234 if (EQ (value, Qnever))
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235 ldap_deref = LDAP_DEREF_NEVER;
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236 else if (EQ (value, Qsearch))
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237 ldap_deref = LDAP_DEREF_SEARCHING;
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238 else if (EQ (value, Qfind))
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239 ldap_deref = LDAP_DEREF_FINDING;
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240 else if (EQ (value, Qalways))
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241 ldap_deref = LDAP_DEREF_ALWAYS;
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242 else
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243 signal_simple_error ("Invalid deref value", value);
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244 }
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245 /* Timelimit */
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246 else if (EQ (keyword, Qtimelimit))
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247 {
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248 if (!NILP (value))
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249 {
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250 CHECK_INT (value);
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251 ldap_timelimit = XINT (value);
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252 }
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253 }
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254 /* Sizelimit */
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255 else if (EQ (keyword, Qsizelimit))
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256 {
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257 if (!NILP (value))
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258 {
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259 CHECK_INT (value);
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260 ldap_sizelimit = XINT (value);
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261 }
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262 }
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263 }
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264
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265 /* Use ldap-default-base if no default base was given */
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266 if (ldap_base == NULL && !NILP (Vldap_default_base))
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267 {
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268 CHECK_STRING (Vldap_default_base);
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269 ldap_base = alloca (XSTRING_LENGTH (Vldap_default_base) + 1);
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270 strcpy (ldap_base, (char *)XSTRING_DATA (Vldap_default_base));
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271 }
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272
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273 /* Use ldap-default-host if no host was given */
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274 if (ldap_host == NULL && !NILP (Vldap_default_host))
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275 {
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276 CHECK_STRING (Vldap_default_host);
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277 ldap_host = alloca (XSTRING_LENGTH (Vldap_default_host) + 1);
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278 strcpy (ldap_host, (char *)XSTRING_DATA (Vldap_default_host));
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279 }
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280
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281 if (ldap_filter == NULL)
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282 error ("Empty search filter");
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283
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284 /* Garbage collect before connecting (if using UMich lib).
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285 This is ugly, I know, but without this, the UMich LDAP library 3.3
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286 frequently reports "Can't contact LDAP server". I really need to
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287 check what happens inside that lib. Anyway this should be harmless to
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288 XEmacs and makes things work. */
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289 #if defined (HAVE_UMICH_LDAP)
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265
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290 garbage_collect_1 ();
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259
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291 #endif
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292
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293 /* Connect to the server and bind */
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294 message ("Connecting to %s...", ldap_host);
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295 if ( (ld = ldap_open (ldap_host, LDAP_PORT)) == NULL )
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265
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296 signal_simple_error_2 ("Failed connecting to host",
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297 build_string (ldap_host),
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298 lisp_strerror (errno));
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259
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299
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300 #if HAVE_LDAP_SET_OPTION
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301 if (ldap_set_option (ld, LDAP_OPT_DEREF, (void *)&ldap_deref) != LDAP_SUCCESS)
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302 error ("Failed to set deref option");
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303 if (ldap_set_option (ld, LDAP_OPT_TIMELIMIT, (void *)&ldap_timelimit) != LDAP_SUCCESS)
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304 error ("Failed to set timelimit option");
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305 if (ldap_set_option (ld, LDAP_OPT_SIZELIMIT, (void *)&ldap_sizelimit) != LDAP_SUCCESS)
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306 error ("Failed to set sizelimit option");
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307 if (ldap_set_option (ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON) != LDAP_SUCCESS)
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308 error ("Failed to set referral option");
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309 #else /* HAVE_LDAP_SET_OPTION */
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310 ld->ld_deref = ldap_deref;
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311 ld->ld_timelimit = ldap_timelimit;
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312 ld->ld_sizelimit = ldap_sizelimit;
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313 #ifdef LDAP_REFERRALS
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314 ld->ld_options = LDAP_OPT_REFERRALS;
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315 #else /* LDAP_REFERRALS */
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316 ld->ld_options = 0;
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317 #endif /* LDAP_REFERRALS */
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318 #endif /* HAVE_LDAP_SET_OPTION */
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319
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320 message ("Binding to %s...", ldap_host);
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321 if ( (err = (ldap_bind_s (ld, ldap_binddn, ldap_passwd, ldap_auth ))) != LDAP_SUCCESS )
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322 signal_simple_error ("Failed binding to the server",
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323 build_string (ldap_err2string (err)));
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324
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325 /* Perform the search */
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326 message ("Searching with LDAP on %s...", ldap_host);
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327 if ( ldap_search (ld, ldap_base, ldap_scope, ldap_filter,
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328 ldap_attributes, ldap_attrsonly) == -1)
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329 {
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330 ldap_unbind (ld);
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331 #if HAVE_LDAP_GET_ERRNO
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332 signal_simple_error ("Error during LDAP search",
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333 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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334 #else
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335 signal_simple_error ("Error during LDAP search",
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336 build_string (ldap_err2string (ld->ld_errno)));
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337 #endif
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338 }
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339
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340 /* Build the results list */
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341 matches = 0;
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342
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343 while ( (rc = ldap_result (ld, LDAP_RES_ANY, 0, NULL, &res))
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344 == LDAP_RES_SEARCH_ENTRY )
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345 {
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346 matches ++;
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347 e = ldap_first_entry (ld, res);
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348 message ("Parsing results... %d", matches);
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349 entry = Qnil;
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350 for (a= ldap_first_attribute (ld, e, &ptr);
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351 a != NULL;
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352 a= ldap_next_attribute (ld, e, ptr) )
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353 {
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354 list = Fcons (build_string (a), Qnil);
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355 vals = ldap_get_values (ld, e, a);
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356 if (vals != NULL)
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357 {
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358 for (i=0; vals[i]!=NULL; i++)
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359 {
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360 list = Fcons (build_string (vals[i]),
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361 list);
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362 }
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363 }
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364 entry = Fcons (Fnreverse (list),
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365 entry);
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366 ldap_value_free (vals);
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367 }
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368 result = Fcons (Fnreverse (entry),
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369 result);
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370 ldap_msgfree (res);
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371 }
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372
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373 if (rc == -1)
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374 {
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375 #if HAVE_LDAP_GET_ERRNO
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376 signal_simple_error ("Error retrieving result",
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377 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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378 #else
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379 signal_simple_error ("Error retrieving result",
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380 build_string (ldap_err2string (ld->ld_errno)));
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381 #endif
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382 }
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383
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384 if ((rc = ldap_result2error (ld, res, 0)) != LDAP_SUCCESS)
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385 {
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386 #if HAVE_LDAP_GET_ERRNO
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387 signal_simple_error ("Error on result",
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388 build_string (ldap_err2string (ldap_get_lderrno (ld, NULL, NULL))));
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389 #else
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390 signal_simple_error ("Error on result",
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391 build_string (ldap_err2string (ld->ld_errno)));
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392 #endif
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393 }
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394
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395 ldap_msgfree (res);
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396 ldap_unbind (ld);
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397 message ("Done.");
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398
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399 result = Fnreverse (result);
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400 clear_message ();
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401
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402 UNGCPRO;
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403 return result;
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404 }
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405
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406
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407 void
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408 syms_of_eldap (void)
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409 {
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410 DEFSUBR(Fldap_search_internal);
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411
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412 defsymbol (&Qhost, "host");
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413 defsymbol (&Qfilter, "filter");
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414 defsymbol (&Qattributes, "attributes");
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415 defsymbol (&Qattrsonly, "attrsonly");
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416 defsymbol (&Qbase, "base");
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417 defsymbol (&Qscope, "scope");
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418 defsymbol (&Qauth, "auth");
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|
419 defsymbol (&Qbinddn, "binddn");
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420 defsymbol (&Qpasswd, "passwd");
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421 defsymbol (&Qderef, "deref");
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422 defsymbol (&Qtimelimit, "timelimit");
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423 defsymbol (&Qsizelimit, "sizelimit");
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424 defsymbol (&Qonelevel, "onelevel");
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425 defsymbol (&Qsubtree, "subtree");
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426 #ifdef LDAP_AUTH_KRBV41
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|
|
427 defsymbol (&Qkrbv41, "krbv41");
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|
|
428 #endif
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|
|
429 #ifdef LDAP_AUTH_KRBV42
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|
|
430 defsymbol (&Qkrbv42, "krbv42");
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|
|
431 #endif
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|
|
432 defsymbol (&Qnever, "never");
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|
|
433 defsymbol (&Qalways, "always");
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|
|
434 defsymbol (&Qfind, "find");
|
|
|
435 }
|
|
|
436
|
|
|
437 void
|
|
|
438 vars_of_eldap (void)
|
|
|
439 {
|
|
|
440 Fprovide (intern ("ldap-internal"));
|
|
|
441
|
|
|
442 DEFVAR_LISP ("ldap-default-host", &Vldap_default_host /*
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|
|
443 Default LDAP host.
|
|
|
444 */ );
|
|
|
445
|
|
|
446 DEFVAR_LISP ("ldap-default-base", &Vldap_default_base /*
|
|
|
447 Default base for LDAP searches.
|
|
|
448 This is a string using the syntax of RFC 1779.
|
|
|
449 For instance, "o=ACME, c=US" limits the search to the
|
|
|
450 Acme organization in the United States.
|
|
|
451 */ );
|
|
|
452
|
|
|
453 Vldap_default_host = Qnil;
|
|
|
454 Vldap_default_base = Qnil;
|
|
|
455 }
|
