--- /dev/null
+/*
+ * ITKACL module, (C) 2004-2011 Steinar H. Gunderson
+ */
+
+#define MODAUTHITKACL_VERSION "0.4"
+
+#include "apr_strings.h"
+
+#include "ap_config.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "http_protocol.h"
+#include "http_request.h"
+
+module AP_MODULE_DECLARE_DATA authz_itkacl_module;
+
+extern int itkacl_check(const char * const realm, const char * const user,
+ char *errmsg, size_t errmsg_size);
+
+typedef struct {
+ int authoritative;
+} authz_itkacl_config_rec;
+
+static void *authz_itkacl_dir_create_config(apr_pool_t *p, char *d)
+{
+ authz_itkacl_config_rec *conf = apr_palloc(p, sizeof(*conf));
+
+ conf->authoritative = 1; /* keep the fortress secure by default */
+ return conf;
+}
+
+static const command_rec authz_itkacl_cmds[] =
+{
+ AP_INIT_FLAG("AuthzITKACLAuthoritative", ap_set_flag_slot,
+ (void *)APR_OFFSETOF(authz_itkacl_config_rec, authoritative),
+ OR_AUTHCFG,
+ "Set to 'Off' to allow access control to be passed along to "
+ "lower modules if the 'require user' or 'require valid-user' "
+ "statement is not met. (default: On)."),
+ {NULL}
+};
+
+static int fail(request_rec *r, authz_itkacl_config_rec *conf)
+{
+ if (conf->authoritative) {
+ ap_note_auth_failure(r);
+ return HTTP_UNAUTHORIZED;
+ } else {
+ return DECLINED;
+ }
+}
+
+static int handle_require(request_rec *r, authz_itkacl_config_rec *conf, const char *username, const char *acl_path)
+{
+ char errmsg[1024];
+ int ret;
+
+ ret = itkacl_check(acl_path, username, errmsg, 1024);
+ if (ret == 0) {
+ return OK;
+ }
+
+ if (ret == -1) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "error during itkacl check for %s on %s: %s",
+ username, acl_path, errmsg);
+ }
+
+ return HTTP_UNAUTHORIZED;
+}
+
+static int authz_itkacl_authorize_user(request_rec *r)
+{
+ char *username, *ptr;
+ const apr_array_header_t *reqs_arr = ap_requires(r);
+ unsigned i;
+ require_line *reqs;
+ authz_itkacl_config_rec *conf = (authz_itkacl_config_rec *)
+ ap_get_module_config(r->per_dir_config, &authz_itkacl_module);
+
+ if (reqs_arr == NULL)
+ return DECLINED;
+
+ /* strip the domain part (FIXME: use the alias module instead?) */
+ username = strdup(r->user);
+ ptr = strchr(username, '@');
+ if (ptr != NULL)
+ ptr[0] = 0;
+
+ reqs = (require_line *)reqs_arr->elts;
+ for (i = 0; i < reqs_arr->nelts; ++i) {
+ const char *t, *w;
+
+ if (!(reqs[i].method_mask & (AP_METHOD_BIT << (r->method_number))))
+ continue;
+
+ t = reqs[i].requirement;
+ w = ap_getword_white(r->pool, &t);
+
+ if (strcasecmp(w, "valid-user") == 0) {
+ free(username);
+ return OK;
+ }
+
+ if (strcasecmp(w, "itkacl") == 0) {
+ const char *acl_path;
+
+ acl_path = ap_getword_conf(r->pool, &t);
+ if (acl_path == NULL || strcmp(acl_path, "") == 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "'Require itkacl' needs an argument");
+ return fail(r, conf);
+ }
+
+ if (strcasecmp(acl_path, "anyof") == 0) {
+ int num_seen = 0, ret;
+ while ((acl_path = ap_getword_conf(r->pool, &t)) != NULL) {
+ ret = handle_require(r, conf, username, acl_path);
+ if (ret == OK) {
+ free(username);
+ return ret;
+ }
+ ++num_seen;
+ }
+ if (num_seen == 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Missing arguments after 'Require itkacl anyof'");
+ } else if (ret == HTTP_UNAUTHORIZED) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "%s failed itkacl check for (multiple paths)",
+ username, acl_path);
+ ret = fail(r, conf);
+ }
+ free(username);
+ return ret;
+ } else {
+ /* check that there are no more arguments */
+ w = ap_getword_conf(r->pool, &t);
+ if (w != NULL && strcmp(w, "") != 0) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ "Excess arguments ('%s') after Require itkacl %s; "
+ "did you mean 'Require itkacl anyof ...'?",
+ w, acl_path);
+ return fail(r, conf);
+ }
+
+ int ret = handle_require(r, conf, username, acl_path);
+ if (ret == HTTP_UNAUTHORIZED) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+ "%s failed itkacl check for %s",
+ username, acl_path);
+ ret = fail(r, conf);
+ }
+ free(username);
+ return ret;
+ }
+ }
+ }
+
+ free(username);
+ return DECLINED;
+}
+
+static int authz_itkacl_init_handler(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
+{
+ ap_add_version_component(p, "mod_auth_itkacl/" MODAUTHITKACL_VERSION);
+ return OK;
+}
+
+void authz_itkacl_register_hooks(apr_pool_t *p)
+{
+ ap_hook_post_config(authz_itkacl_init_handler, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_auth_checker(authz_itkacl_authorize_user, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+module AP_MODULE_DECLARE_DATA authz_itkacl_module =
+{
+ STANDARD20_MODULE_STUFF,
+ authz_itkacl_dir_create_config,
+ NULL,
+ NULL,
+ NULL,
+ authz_itkacl_cmds,
+ authz_itkacl_register_hooks
+};
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