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nginx-auth-ldap
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slightly patched fork of LDAP authentication module for nginx
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nginx-auth-ldap/ngx_http_auth_ldap_module.c

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/**
* Copyright (C) 2011-2013 Valery Komarov <komarov@valerka.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>
#include <ldap.h>
typedef struct {
ngx_str_t username;
ngx_str_t password;
} ngx_ldap_userinfo;
typedef struct {
ngx_str_t value;
ngx_array_t *lengths;
ngx_array_t *values;
} ngx_ldap_require_t;
typedef struct {
LDAPURLDesc *ludpp;
ngx_str_t url;
ngx_str_t alias;
ngx_str_t bind_dn;
ngx_str_t bind_dn_passwd;
ngx_str_t group_attribute;
ngx_flag_t group_attribute_dn;
ngx_array_t *require_group; /* array of ngx_ldap_require_t */
ngx_array_t *require_user; /* array of ngx_ldap_require_t */
ngx_flag_t require_valid_user;
ngx_flag_t satisfy_all;
} ngx_ldap_server;
typedef struct {
ngx_str_t realm;
ngx_array_t *servers;
} ngx_http_auth_ldap_loc_conf_t;
typedef struct {
ngx_array_t *servers; /* array of ngx_ldap_server */
ngx_hash_t srv;
} ngx_http_auth_ldap_conf_t;
static void * ngx_http_auth_ldap_create_conf(ngx_conf_t *cf);
static char * ngx_http_auth_ldap_ldap_server_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static char * ngx_http_auth_ldap_parse_url(ngx_conf_t *cf, ngx_ldap_server *server);
static char * ngx_http_auth_ldap_parse_require(ngx_conf_t *cf, ngx_ldap_server *server);
static char * ngx_http_auth_ldap_parse_satisfy(ngx_conf_t *cf, ngx_ldap_server *server);
static char * ngx_http_auth_ldap_ldap_server(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
static ngx_int_t ngx_http_auth_ldap_handler(ngx_http_request_t *r);
static ngx_int_t ngx_http_auth_ldap_init(ngx_conf_t *cf);
static void * ngx_http_auth_basic_create_loc_conf(ngx_conf_t *);
static char * ngx_http_auth_ldap_merge_loc_conf(ngx_conf_t *, void *, void *);
static ngx_int_t ngx_http_auth_ldap_authenticate_against_server(ngx_http_request_t *r, ngx_ldap_server *server,
ngx_ldap_userinfo *uinfo, ngx_http_auth_ldap_loc_conf_t *conf);
static ngx_int_t ngx_http_auth_ldap_set_realm(ngx_http_request_t *r, ngx_str_t *realm);
static ngx_ldap_userinfo * ngx_http_auth_ldap_get_user_info(ngx_http_request_t *);
static ngx_int_t ngx_http_auth_ldap_authenticate(ngx_http_request_t *r, ngx_http_auth_ldap_loc_conf_t *conf,
ngx_http_auth_ldap_conf_t *mconf);
static char * ngx_http_auth_ldap(ngx_conf_t *cf, void *post, void *data);
static ngx_conf_post_handler_pt ngx_http_auth_ldap_p = ngx_http_auth_ldap;
static ngx_command_t ngx_http_auth_ldap_commands[] = {
{
ngx_string("ldap_server"),
NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE1,
ngx_http_auth_ldap_ldap_server_block,
NGX_HTTP_MAIN_CONF_OFFSET,
0,
NULL
},
{
ngx_string("auth_ldap"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_HTTP_LMT_CONF | NGX_CONF_TAKE1,
ngx_conf_set_str_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_auth_ldap_loc_conf_t, realm),
&ngx_http_auth_ldap_p
},
{
ngx_string("auth_ldap_servers"),
NGX_HTTP_MAIN_CONF | NGX_HTTP_SRV_CONF | NGX_HTTP_LOC_CONF | NGX_HTTP_LMT_CONF | NGX_CONF_TAKE1234 | NGX_CONF_TAKE5 |NGX_CONF_TAKE6|NGX_CONF_TAKE7,
ngx_conf_set_str_array_slot,
NGX_HTTP_LOC_CONF_OFFSET,
offsetof(ngx_http_auth_ldap_loc_conf_t, servers),
NULL
},
ngx_null_command
};
static ngx_http_module_t ngx_http_auth_ldap_module_ctx = {
NULL, /* preconfiguration */
ngx_http_auth_ldap_init, /* postconfiguration */
ngx_http_auth_ldap_create_conf, /* create main configuration */
NULL, /* init main configuration */
NULL, //ngx_http_auth_ldap_create_server_conf, /* create server configuration */
NULL, //ngx_http_auth_ldap_merge_server_conf, /* merge server configuration */
ngx_http_auth_basic_create_loc_conf, /* create location configuration */
ngx_http_auth_ldap_merge_loc_conf /* merge location configuration */
};
ngx_module_t ngx_http_auth_ldap_module = {
NGX_MODULE_V1,
&ngx_http_auth_ldap_module_ctx, /* module context */
ngx_http_auth_ldap_commands, /* module directives */
NGX_HTTP_MODULE, /* module type */
NULL, /* init master */
NULL, /* init module */
NULL, /* init process */
NULL, /* init thread */
NULL, /* exit thread */
NULL, /* exit process */
NULL, /* exit master */
NGX_MODULE_V1_PADDING /**/
};
/**
* Reads ldap_server block and sets ngx_http_auth_ldap_ldap_server as a handler of each conf value
*/
static char *
ngx_http_auth_ldap_ldap_server_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
char *rv;
ngx_str_t *value, name;
ngx_conf_t save;
ngx_ldap_server server, *s;
ngx_http_auth_ldap_conf_t *cnf = conf;
value = cf->args->elts;
name = value[1];
if (ngx_strlen(name.data) == 0) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "Error: no name of ldap server specified");
return NGX_CONF_ERROR;
}
server.alias = name;
if (cnf->servers == NULL) {
cnf->servers = ngx_array_create(cf->pool, 7, sizeof(ngx_ldap_server));
if (cnf->servers == NULL) {
return NGX_CONF_ERROR;
}
}
s = ngx_array_push(cnf->servers);
if (s == NULL) {
return NGX_CONF_ERROR;
}
*s = server;
save = *cf;
cf->handler = ngx_http_auth_ldap_ldap_server;
cf->handler_conf = conf;
rv = ngx_conf_parse(cf, NULL);
*cf = save;
if (rv != NGX_CONF_OK) {
return rv;
}
return NGX_CONF_OK;
}
/**
* Called for every variable inside ldap_server block
*/
static char *
ngx_http_auth_ldap_ldap_server(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
{
char *rv;
ngx_str_t *value;
ngx_ldap_server *server;
ngx_http_auth_ldap_conf_t *cnf = conf;
// It should be safe to just use latest server from array
server = ((ngx_ldap_server*)cnf->servers->elts + (cnf->servers->nelts - 1));
value = cf->args->elts;
// TODO: Add more validation
if (ngx_strcmp(value[0].data, "url") == 0) {
return ngx_http_auth_ldap_parse_url(cf, server);
} else if(ngx_strcmp(value[0].data, "binddn") == 0) {
server->bind_dn = value[1];
} else if(ngx_strcmp(value[0].data, "binddn_passwd") == 0) {
server->bind_dn_passwd = value[1];
} else if(ngx_strcmp(value[0].data, "group_attribute") == 0) {
server->group_attribute = value[1];
} else if(ngx_strcmp(value[0].data, "group_attribute_is_dn") == 0 && ngx_strcmp(value[1].data, "on") == 0) {
server->group_attribute_dn = 1;
} else if(ngx_strcmp(value[0].data, "require") == 0) {
return ngx_http_auth_ldap_parse_require(cf, server);
} else if(ngx_strcmp(value[0].data, "satisfy") == 0) {
return ngx_http_auth_ldap_parse_satisfy(cf, server);
}
rv = NGX_CONF_OK;
return rv;
}
/**
* Parse auth_ldap directive
*/
static char *
ngx_http_auth_ldap(ngx_conf_t *cf, void *post, void *data) {
ngx_str_t *realm = data;
size_t len;
u_char *basic, *p;
if (ngx_strcmp(realm->data, "off") == 0) {
realm->len = 0;
realm->data = (u_char *) "";
return NGX_CONF_OK;
}
len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
basic = ngx_pcalloc(cf->pool, len);
if (basic == NULL) {
return NGX_CONF_ERROR;
}
p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1);
p = ngx_cpymem(p, realm->data, realm->len);
*p = '"';
realm->len = len;
realm->data = basic;
return NGX_CONF_OK;
}
/**
* Parse URL conf parameter
*/
static char *
ngx_http_auth_ldap_parse_url(ngx_conf_t *cf, ngx_ldap_server *server) {
ngx_str_t *value;
u_char *p;
value = cf->args->elts;
server->url = *value;
int rc = ldap_url_parse((const char*) value[1].data, &server->ludpp);
if (rc != LDAP_SUCCESS) {
switch (rc) {
case LDAP_URL_ERR_MEM:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Cannot allocate memory space.");
break;
case LDAP_URL_ERR_PARAM:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Invalid parameter.");
break;
case LDAP_URL_ERR_BADSCHEME:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: URL doesnt begin with \"ldap[s]://\".");
break;
case LDAP_URL_ERR_BADENCLOSURE:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: URL is missing trailing \">\".");
break;
case LDAP_URL_ERR_BADURL:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Invalid URL.");
break;
case LDAP_URL_ERR_BADHOST:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Host port is invalid.");
break;
case LDAP_URL_ERR_BADATTRS:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Invalid or missing attributes.");
break;
case LDAP_URL_ERR_BADSCOPE:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Invalid or missing scope string.");
break;
case LDAP_URL_ERR_BADFILTER:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Invalid or missing filter.");
break;
case LDAP_URL_ERR_BADEXTS:
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: Invalid or missing extensions.");
break;
}
return NGX_CONF_ERROR;
}
if (server->ludpp->lud_attrs == NULL) {
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "LDAP: No attrs in auth_ldap_url.");
return NGX_CONF_ERROR;
}
server->url.len = ngx_strlen(server->ludpp->lud_scheme) + ngx_strlen(server->ludpp->lud_host) + 11; // 11 = len("://:/") + len("65535") + len("\0")
server->url.data = ngx_pcalloc(cf->pool, server->url.len);
p = ngx_sprintf(server->url.data, "%s://%s:%d/", (const char*) server->ludpp->lud_scheme,
(const char*) server->ludpp->lud_host, server->ludpp->lud_port);
*p = 0;
return NGX_CONF_OK;
}
/**
* Parse "require" conf parameter
*/
static char *
ngx_http_auth_ldap_parse_require(ngx_conf_t *cf, ngx_ldap_server *server) {
ngx_http_script_compile_t sc;
ngx_str_t *value;
value = cf->args->elts;
if (server->require_user == NULL) {
server->require_user = ngx_array_create(cf->pool, 4, sizeof(ngx_ldap_require_t));
if (server->require_user == NULL) {
return NGX_CONF_ERROR;
}
}
if (server->require_group == NULL) {
server->require_group = ngx_array_create(cf->pool, 4, sizeof(ngx_ldap_require_t));
if (server->require_group == NULL) {
return NGX_CONF_ERROR;
}
}
if (ngx_strcmp(value[1].data, "valid_user") == 0) {
server->require_valid_user = 1;
}
if (ngx_strcmp(value[1].data, "user") == 0 || ngx_strcmp(value[1].data, "group") == 0)
{
ngx_int_t n;
ngx_ldap_require_t *rule = NULL;
if (ngx_strcmp(value[1].data, "user") == 0) {
rule = ngx_array_push(server->require_user);
}
if (ngx_strcmp(value[1].data, "group") == 0) {
rule = ngx_array_push(server->require_group);
}
if (rule == NULL) {
return NGX_CONF_ERROR;
}
rule->value.data = value[2].data;
rule->value.len = value[2].len;
rule->values = NULL;
rule->lengths = NULL;
n = ngx_http_script_variables_count(&value[2]);
if(n > 0) {
ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
sc.cf = cf;
sc.source = &value[2];
sc.lengths = &rule->lengths;
sc.values = &rule->values;
sc.complete_lengths = 1;
sc.complete_values = 1;
if (ngx_http_script_compile(&sc) != NGX_OK) {
return NGX_CONF_ERROR;
}
}
}
return NGX_CONF_OK;
}
/**
* Parse "satisfy" conf parameter
*/
static char *
ngx_http_auth_ldap_parse_satisfy(ngx_conf_t *cf, ngx_ldap_server *server) {
ngx_str_t *value;
value = cf->args->elts;
if (ngx_strcmp(value[1].data, "all") == 0) {
server->satisfy_all = 1;
return NGX_CONF_OK;
}
if (ngx_strcmp(value[1].data, "any") == 0) {
server->satisfy_all = 0;
return NGX_CONF_OK;
}
ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "Incorrect value for auth_ldap_satisfy ");
return NGX_CONF_ERROR;
}
/**
* Create main config which will store ldap_servers array
*/
static void *
ngx_http_auth_ldap_create_conf(ngx_conf_t *cf)
{
ngx_http_auth_ldap_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_ldap_conf_t));
if (conf == NULL) {
return NULL;
}
return conf;
}
/**
* Create location conf
*/
static void *
ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf) {
ngx_http_auth_ldap_loc_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_ldap_loc_conf_t));
if (conf == NULL) {
return NULL;
}
conf->servers = NGX_CONF_UNSET_PTR;
return conf;
}
/**
* Merge location conf
*/
static char *
ngx_http_auth_ldap_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) {
ngx_http_auth_ldap_loc_conf_t *prev = parent;
ngx_http_auth_ldap_loc_conf_t *conf = child;
if (conf->realm.data == NULL) {
conf->realm = prev->realm;
}
ngx_conf_merge_ptr_value(conf->servers, prev->servers, NULL);
return NGX_CONF_OK;
}
/**
* LDAP Authentication handler
*/
static ngx_int_t ngx_http_auth_ldap_handler(ngx_http_request_t *r) {
int rc;
ngx_http_auth_ldap_loc_conf_t *alcf;
alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_ldap_module);
if (alcf->realm.len == 0) {
return NGX_DECLINED;
}
ngx_http_auth_ldap_conf_t *cnf;
cnf = ngx_http_get_module_main_conf(r, ngx_http_auth_ldap_module);
rc = ngx_http_auth_basic_user(r);
if (rc == NGX_DECLINED) {
return ngx_http_auth_ldap_set_realm(r, &alcf->realm);
}
if (rc == NGX_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
return ngx_http_auth_ldap_authenticate(r, alcf, cnf);
}
/**
* Get login and password from http request.
*/
static ngx_ldap_userinfo*
ngx_http_auth_ldap_get_user_info(ngx_http_request_t *r) {
size_t len;
ngx_ldap_userinfo* uinfo;
u_char *uname_buf, *p;
uinfo = ngx_palloc(r->pool, sizeof(ngx_ldap_userinfo));
for (len = 0; len < r->headers_in.user.len; len++) {
if (r->headers_in.user.data[len] == ':') {
break;
}
}
uname_buf = ngx_palloc(r->pool, len + 1);
if (uname_buf == NULL) {
return NULL;
}
p = ngx_cpymem(uname_buf, r->headers_in.user.data, len);
*p = '\0';
uinfo->username.data = uname_buf;
uinfo->username.len = len;
uinfo->password.data = r->headers_in.passwd.data;
uinfo->password.len = r->headers_in.passwd.len;
return uinfo;
}
/**
* Read user credentials from request, set LDAP parameters and call authentication against required servers
*/
static ngx_int_t ngx_http_auth_ldap_authenticate(ngx_http_request_t *r, ngx_http_auth_ldap_loc_conf_t *conf,
ngx_http_auth_ldap_conf_t *mconf) {
ngx_ldap_server *server, *servers;
servers = mconf->servers->elts;
int rc;
ngx_uint_t i, k;
ngx_str_t *alias;
int version = LDAP_VERSION3;
int reqcert = LDAP_OPT_X_TLS_ALLOW;
ngx_ldap_userinfo *uinfo;
struct timeval timeOut = { 10, 0 };
ngx_flag_t pass = NGX_CONF_UNSET;
uinfo = ngx_http_auth_ldap_get_user_info(r);
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP username: %s", uinfo->username.data);
if (uinfo == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (uinfo->password.len == 0)
{
return ngx_http_auth_ldap_set_realm(r, &conf->realm);
}
/// Set LDAP version to 3 and set connection timeout.
ldap_set_option(NULL, LDAP_OPT_PROTOCOL_VERSION, &version);
ldap_set_option(NULL, LDAP_OPT_NETWORK_TIMEOUT, &timeOut);
rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &reqcert);
if (rc != LDAP_OPT_SUCCESS) {
ngx_log_error(NGX_LOG_WARN, r->connection->log, 0, "LDAP: unable to set require cert option: %s",
ldap_err2string(rc));
}
// TODO: We might be using hash here, cause this loops is quite ugly, but it is simple and it works
int found;
for (k = 0; k < conf->servers->nelts; k++) {
alias = ((ngx_str_t*)conf->servers->elts + k);
found = 0;
for (i = 0; i < mconf->servers->nelts; i++) {
server = &servers[i];
if (server->alias.len == alias->len && ngx_strncmp(server->alias.data, alias->data, server->alias.len) == 0) {
found = 1;
pass = ngx_http_auth_ldap_authenticate_against_server(r, server, uinfo, conf);
if (pass == 1) {
return NGX_OK;
} else if (pass == NGX_HTTP_INTERNAL_SERVER_ERROR) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
}
// If requested ldap server is not found, return 500 and write to log
if (found == 0) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "LDAP: Server \"%s\" is not defined!", alias->data);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
}
return ngx_http_auth_ldap_set_realm(r, &conf->realm);
}
/**
* Actual authentication against LDAP server
*/
static ngx_int_t ngx_http_auth_ldap_authenticate_against_server(ngx_http_request_t *r, ngx_ldap_server *server, ngx_ldap_userinfo *uinfo, ngx_http_auth_ldap_loc_conf_t *conf) {
LDAPURLDesc *ludpp = server->ludpp;
int rc;
LDAP *ld;
LDAPMessage *searchResult;
char *dn;
u_char *p, *filter;
ngx_ldap_require_t *value;
ngx_uint_t i;
struct berval bvalue;
ngx_flag_t pass = NGX_CONF_UNSET;
struct timeval timeOut = { 10, 0 };
if (server->ludpp == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: URL: %s", server->url.data);
rc = ldap_initialize(&ld, (const char*) server->url.data);
if (rc != LDAP_SUCCESS) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "LDAP: Session initializing failed: %d, %s, (%s)", rc,
ldap_err2string(rc), (const char*) server->url.data);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: Session initialized", NULL);
/// Bind to the server
rc = ldap_simple_bind_s(ld, (const char *) server->bind_dn.data, (const char *) server->bind_dn_passwd.data);
if (rc != LDAP_SUCCESS) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "LDAP [%s]: ldap_simple_bind_s error: %d, %s", server->url.data, rc,
ldap_err2string(rc));
ldap_unbind_s(ld);
// Do not throw 500 in case connection failure, multiple servers might be used for failover scenario
return 0;
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: Bind successful", NULL);
/// Create filter for search users by uid
filter = ngx_pcalloc(
r->pool,
(ludpp->lud_filter != NULL ? ngx_strlen(ludpp->lud_filter) : ngx_strlen("(objectClass=*)")) + ngx_strlen("(&(=))") + ngx_strlen(ludpp->lud_attrs[0])
+ uinfo->username.len + 1);
p = ngx_sprintf(filter, "(&%s(%s=%s))", ludpp->lud_filter != NULL ? ludpp->lud_filter : "(objectClass=*)", ludpp->lud_attrs[0], uinfo->username.data);
*p = 0;
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: filter %s", (const char*) filter);
/// Search the directory
rc = ldap_search_ext_s(ld, ludpp->lud_dn, ludpp->lud_scope, (const char*) filter, NULL, 0, NULL, NULL, &timeOut, 0,
&searchResult);
if (rc != LDAP_SUCCESS) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "LDAP: ldap_search_ext_s: %d, %s", rc, ldap_err2string(rc));
ldap_msgfree(searchResult);
ldap_unbind_s(ld);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
if (ldap_count_entries(ld, searchResult) > 0) {
dn = ldap_get_dn(ld, searchResult);
if (dn != NULL) {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: result DN %s", dn);
/// Check require user
if (server->require_user != NULL) {
value = server->require_user->elts;
for (i = 0; i < server->require_user->nelts; i++) {
ngx_str_t val;
if (value[i].lengths == NULL) {
val = value[i].value;
} else {
if (ngx_http_script_run(r, &val, value[i].lengths->elts, 0,
value[i].values->elts) == NULL)
{
ldap_memfree(dn);
ldap_msgfree(searchResult);
ldap_unbind_s(ld);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
val.data[val.len] = '\0';
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: compare with: %s", val.data);
if (ngx_strncmp(val.data, dn, val.len) == 0) {
pass = 1;
if (server->satisfy_all == 0) {
break;
}
} else {
if (server->satisfy_all == 1) {
ldap_memfree(dn);
ldap_msgfree(searchResult);
ldap_unbind_s(ld);
return 0;
}
}
}
}
/// Check require group
if (server->require_group != NULL) {
if (server->group_attribute_dn == 1) {
bvalue.bv_val = dn;
bvalue.bv_len = ngx_strlen(dn);
} else {
bvalue.bv_val = (char*) uinfo->username.data;
bvalue.bv_len = uinfo->username.len;
}
value = server->require_group->elts;
for (i = 0; i < server->require_group->nelts; i++) {
ngx_str_t val;
if (value[i].lengths == NULL) {
val = value[i].value;
} else {
if (ngx_http_script_run(r, &val, value[i].lengths->elts, 0,
value[i].values->elts) == NULL)
{
ldap_memfree(dn);
ldap_msgfree(searchResult);
ldap_unbind_s(ld);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
val.data[val.len] = '\0';
}
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: group compare with: %s", val.data);
rc = ldap_compare_ext_s(ld, (const char*) val.data, (const char*) server->group_attribute.data,
&bvalue, NULL, NULL);
/*if (rc != LDAP_COMPARE_TRUE && rc != LDAP_COMPARE_FALSE && rc != LDAP_NO_SUCH_ATTRIBUTE ) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "LDAP: ldap_search_ext_s: %d, %s", rc,
ldap_err2string(rc));
ldap_memfree(dn);
ldap_msgfree(searchResult);
ldap_unbind_s(ld);
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}*/
if (rc == LDAP_COMPARE_TRUE) {
pass = 1;
if (server->satisfy_all == 0) {
break;
}
} else {
if (server->satisfy_all == 1) {
pass = 0;
break;
}
}
}
}
/// Check valid user
if ( pass != 0 || (server->require_valid_user == 1 && server->satisfy_all == 0 && pass == 0)) {
/// Bind user to the server
rc = ldap_simple_bind_s(ld, dn, (const char *) uinfo->password.data);
if (rc != LDAP_SUCCESS) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "LDAP: ldap_simple_bind_s error: %d, %s", rc,
ldap_err2string(rc));
pass = 0;
} else {
ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "LDAP: User bind successful", NULL);
if (server->require_valid_user == 1) pass = 1;
}
}
}
ldap_memfree(dn);
}
ldap_msgfree(searchResult);
ldap_unbind_s(ld);
return pass;
}
/**
* Respond with forbidden and add correct headers
*/
static ngx_int_t ngx_http_auth_ldap_set_realm(ngx_http_request_t *r, ngx_str_t *realm) {
r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers);
if (r->headers_out.www_authenticate == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
r->headers_out.www_authenticate->hash = 1;
r->headers_out.www_authenticate->key.len = sizeof("WWW-Authenticate") - 1;
r->headers_out.www_authenticate->key.data = (u_char *) "WWW-Authenticate";
r->headers_out.www_authenticate->value = *realm;
return NGX_HTTP_UNAUTHORIZED;
}
/**
* Init module and add ldap auth handler to NGX_HTTP_ACCESS_PHASE
*/
static ngx_int_t ngx_http_auth_ldap_init(ngx_conf_t *cf) {
ngx_http_handler_pt *h;
ngx_http_core_main_conf_t *cmcf;
cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers);
if (h == NULL) {
return NGX_ERROR;
}
*h = ngx_http_auth_ldap_handler;
return NGX_OK;
}