1 /* SASL LDAP auxprop implementation
2 * Copyright (C) 2002,2003 Howard Chu, All rights reserved. <hyc@symas.com>
4 * Permission is granted to anyone to use this software for any purpose
5 * on any computer system, and to alter it and redistribute it, subject
6 * to the following restrictions:
8 * 1. The author is not responsible for the consequences of use of this
9 * software, no matter how awful, even if they arise from flaws in it.
11 * 2. The origin of this software must not be misrepresented, either by
12 * explicit claim or by omission. Since few users ever read sources,
13 * credits should appear in the documentation.
15 * 3. Altered versions must be plainly marked as such, and must not be
16 * misrepresented as being the original software. Since few users
17 * ever read sources, credits should appear in the documentation.
19 * 4. This notice may not be removed or altered.
30 #include "plugin_common.h"
34 static char ldapdb[] = "ldapdb";
36 typedef struct ldapctx {
37 const char *uri; /* URI of LDAP server */
38 struct berval id; /* SASL authcid to bind as */
39 struct berval pw; /* password for bind */
40 struct berval mech; /* SASL mech */
41 int use_tls; /* Issue StartTLS request? */
44 static int ldapdb_interact(LDAP *ld, unsigned flags __attribute__((unused)),
45 void *def, void *inter)
47 sasl_interact_t *in = inter;
51 for (;in->id != SASL_CB_LIST_END;in++)
56 case SASL_CB_GETREALM:
57 ldap_get_option(ld, LDAP_OPT_X_SASL_REALM, &p.bv_val);
58 if (p.bv_val) p.bv_len = strlen(p.bv_val);
60 case SASL_CB_AUTHNAME:
69 in->result = p.bv_val;
76 typedef struct connparm {
83 static int ldapdb_connect(ldapctx *ctx, sasl_server_params_t *sparams,
84 const char *user, unsigned ulen, connparm *cp)
89 if((i=ldap_initialize(&cp->ld, ctx->uri))) {
93 authzid = sparams->utils->malloc(ulen + sizeof("u:"));
95 return LDAP_NO_MEMORY;
97 strcpy(authzid, "u:");
98 strcpy(authzid+2, user);
99 cp->c.ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
100 cp->c.ldctl_value.bv_val = authzid;
101 cp->c.ldctl_value.bv_len = ulen + 2;
102 cp->c.ldctl_iscritical = 1;
105 ldap_set_option(cp->ld, LDAP_OPT_PROTOCOL_VERSION, &i);
107 /* If TLS is set and it fails, continue or bail out as requested */
108 if (ctx->use_tls && (i=ldap_start_tls_s(cp->ld, NULL, NULL)) != LDAP_SUCCESS
109 && ctx->use_tls > 1) {
110 sparams->utils->free(authzid);
114 i = ldap_sasl_interactive_bind_s(cp->ld, NULL, ctx->mech.bv_val, NULL,
115 NULL, LDAP_SASL_QUIET, ldapdb_interact, ctx);
116 if (i != LDAP_SUCCESS) {
117 sparams->utils->free(authzid);
121 cp->ctrl[0] = &cp->c;
123 i = ldap_whoami_s(cp->ld, &cp->dn, cp->ctrl, NULL);
124 if (i == LDAP_SUCCESS && cp->dn) {
125 if (!cp->dn->bv_val || strncmp(cp->dn->bv_val, "dn:", 3)) {
128 i = LDAP_INVALID_SYNTAX;
130 cp->c.ldctl_value = *(cp->dn);
133 sparams->utils->free(authzid);
137 static void ldapdb_auxprop_lookup(void *glob_context,
138 sasl_server_params_t *sparams,
143 ldapctx *ctx = glob_context;
145 int ret, i, n, *aindx;
146 const struct propval *pr;
147 struct berval **bvals;
148 LDAPMessage *msg, *res;
151 if(!ctx || !sparams || !user) return;
153 pr = sparams->utils->prop_get(sparams->propctx);
156 /* count how many attrs to fetch */
157 for(i = 0, n = 0; pr[i].name; i++) {
158 if(pr[i].name[0] == '*' && (flags & SASL_AUXPROP_AUTHZID))
160 if(pr[i].values && !(flags & SASL_AUXPROP_OVERRIDE))
164 /* nothing to do, bail out */
167 /* alloc an array of attr names for search, and index to the props */
168 attrs = sparams->utils->malloc((n+1)*sizeof(char *)*2);
171 aindx = (int *)(attrs + n + 1);
174 for (i=0, n=0; pr[i].name; i++) {
175 if(pr[i].name[0] == '*' && (flags & SASL_AUXPROP_AUTHZID))
177 if(pr[i].values && !(flags & SASL_AUXPROP_OVERRIDE))
179 attrs[n] = (char *)pr[i].name;
180 if (pr[i].name[0] == '*') attrs[n]++;
186 if(ldapdb_connect(ctx, sparams, user, ulen, &cp)) {
190 ret = ldap_search_ext_s(cp.ld, cp.dn->bv_val+3, LDAP_SCOPE_BASE,
191 "(objectclass=*)", attrs, 0, cp.ctrl, NULL, NULL, 1, &res);
194 if (ret != LDAP_SUCCESS) goto done;
196 for(msg=ldap_first_message(cp.ld, res); msg; msg=ldap_next_message(cp.ld, msg))
198 if (ldap_msgtype(msg) != LDAP_RES_SEARCH_ENTRY) continue;
201 bvals = ldap_get_values_len(cp.ld, msg, attrs[i]);
202 if (!bvals) continue;
203 if (pr[aindx[i]].values)
204 sparams->utils->prop_erase(sparams->propctx, pr[aindx[i]].name);
205 sparams->utils->prop_set(sparams->propctx, pr[aindx[i]].name,
206 bvals[0]->bv_val, bvals[0]->bv_len);
213 if(attrs) sparams->utils->free(attrs);
214 if(cp.ld) ldap_unbind(cp.ld);
217 static int ldapdb_auxprop_store(void *glob_context,
218 sasl_server_params_t *sparams,
219 struct propctx *prctx,
223 ldapctx *ctx = glob_context;
225 const struct propval *pr;
229 /* just checking if we are enabled */
230 if (!prctx) return SASL_OK;
232 if (!sparams || !user) return SASL_BADPARAM;
234 pr = sparams->utils->prop_get(prctx);
235 if (!pr) return SASL_BADPARAM;
237 for (n=0; pr[n].name; n++);
238 if (!n) return SASL_BADPARAM;
240 mods = sparams->utils->malloc((n+1) * sizeof(LDAPMod*) + n * sizeof(LDAPMod));
241 if (!mods) return SASL_NOMEM;
243 if((i=ldapdb_connect(ctx, sparams, user, ulen, &cp)) == 0) {
245 for (i=0; i<n; i++) {
246 mods[i] = (LDAPMod *)((char *)(mods+n+1) + i * sizeof(LDAPMod));
247 mods[i]->mod_op = LDAP_MOD_REPLACE;
248 mods[i]->mod_type = (char *)pr[i].name;
249 mods[i]->mod_values = (char **)pr[i].values;
253 i = ldap_modify_ext_s(cp.ld, cp.dn->bv_val+3, mods, cp.ctrl, NULL);
257 sparams->utils->free(mods);
260 sparams->utils->seterror(sparams->utils->conn, 0,
262 if (i == LDAP_NO_MEMORY) i = SASL_NOMEM;
265 if (cp.ld) ldap_unbind(cp.ld);
269 static void ldapdb_auxprop_free(void *glob_ctx, const sasl_utils_t *utils)
271 utils->free(glob_ctx);
274 static sasl_auxprop_plug_t ldapdb_auxprop_plugin = {
277 NULL, /* glob_context */
278 ldapdb_auxprop_free, /* auxprop_free */
279 ldapdb_auxprop_lookup, /* auxprop_lookup */
281 ldapdb_auxprop_store /* spare if <2.1.16*/
284 static int ldapdb_auxprop_plug_init(const sasl_utils_t *utils,
287 sasl_auxprop_plug_t **plug,
288 const char *plugname __attribute__((unused)))
294 if(!out_version || !plug) return SASL_BADPARAM;
296 if(max_version < SASL_AUXPROP_PLUG_VERSION) return SASL_BADVERS;
298 memset(&tmp, 0, sizeof(tmp));
300 utils->getopt(utils->getopt_context, ldapdb, "ldapdb_uri", &tmp.uri, NULL);
301 if(!tmp.uri) return SASL_BADPARAM;
303 utils->getopt(utils->getopt_context, ldapdb, "ldapdb_id",
304 (const char **)&tmp.id.bv_val, &len);
306 utils->getopt(utils->getopt_context, ldapdb, "ldapdb_pw",
307 (const char **)&tmp.pw.bv_val, &len);
309 utils->getopt(utils->getopt_context, ldapdb, "ldapdb_mech",
310 (const char **)&tmp.mech.bv_val, &len);
311 tmp.mech.bv_len = len;
312 utils->getopt(utils->getopt_context, ldapdb, "ldapdb_starttls", &s, NULL);
315 if (!strcasecmp(s, "demand")) tmp.use_tls = 2;
316 else if (!strcasecmp(s, "try")) tmp.use_tls = 1;
318 utils->getopt(utils->getopt_context, ldapdb, "ldapdb_rc", &s, &len);
321 char *str = utils->malloc(sizeof("LDAPRC=")+len);
322 if (!str) return SASL_NOMEM;
323 strcpy( str, "LDAPRC=" );
324 strcpy( str + sizeof("LDAPRC=")-1, s );
332 p = utils->malloc(sizeof(ldapctx));
333 if (!p) return SASL_NOMEM;
335 ldapdb_auxprop_plugin.glob_context = p;
337 *out_version = SASL_AUXPROP_PLUG_VERSION;
339 *plug = &ldapdb_auxprop_plugin;
344 SASL_AUXPROP_PLUG_INIT( ldapdb )