1 files changed, 146 insertions, 0 deletions
diff --git a/modules/aaa/mod_authz_user.c b/modules/aaa/mod_authz_user.c
new file mode 100644
index 0000000..881f77f
--- /dev/null
+++ b/modules/aaa/mod_authz_user.c
@@ -0,0 +1,146 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_strings.h"
+
+#include "ap_config.h"
+#include "ap_provider.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "http_protocol.h"
+#include "http_request.h"
+
+#include "mod_auth.h"
+
+typedef struct {
+        int dummy;  /* just here to stop compiler warnings for now. */
+} authz_user_config_rec;
+
+static void *create_authz_user_dir_config(apr_pool_t *p, char *d)
+{
+    authz_user_config_rec *conf = apr_palloc(p, sizeof(*conf));
+
+    return conf;
+}
+
+static const command_rec authz_user_cmds[] =
+{
+    {NULL}
+};
+
+module AP_MODULE_DECLARE_DATA authz_user_module;
+
+static authz_status user_check_authorization(request_rec *r,
+                                             const char *require_args,
+                                             const void *parsed_require_args)
+{
+    const char *err = NULL;
+    const ap_expr_info_t *expr = parsed_require_args;
+    const char *require;
+
+    const char *t, *w;
+
+    if (!r->user) {
+        return AUTHZ_DENIED_NO_USER;
+    }
+
+    require = ap_expr_str_exec(r, expr, &err);
+    if (err) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02594)
+                      "authz_user authorize: require user: Can't "
+                      "evaluate require expression: %s", err);
+        return AUTHZ_DENIED;
+    }
+
+    t = require;
+    while ((w = ap_getword_conf(r->pool, &t)) && w[0]) {
+        if (!strcmp(r->user, w)) {
+            return AUTHZ_GRANTED;
+        }
+    }
+
+    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01663)
+                  "access to %s failed, reason: user '%s' does not meet "
+                  "'require'ments for user to be allowed access",
+                  r->uri, r->user);
+
+    return AUTHZ_DENIED;
+}
+
+static authz_status validuser_check_authorization(request_rec *r,
+                                                  const char *require_line,
+                                                  const void *parsed_require_line)
+{
+    if (!r->user) {
+        return AUTHZ_DENIED_NO_USER;
+    }
+
+    return AUTHZ_GRANTED;
+}
+
+static const char *user_parse_config(cmd_parms *cmd, const char *require_line,
+                                     const void **parsed_require_line)
+{
+    const char *expr_err = NULL;
+    ap_expr_info_t *expr;
+
+    expr = ap_expr_parse_cmd(cmd, require_line, AP_EXPR_FLAG_STRING_RESULT,
+            &expr_err, NULL);
+
+    if (expr_err)
+        return apr_pstrcat(cmd->temp_pool,
+                           "Cannot parse expression in require line: ",
+                           expr_err, NULL);
+
+    *parsed_require_line = expr;
+
+    return NULL;
+}
+
+static const authz_provider authz_user_provider =
+{
+    &user_check_authorization,
+    &user_parse_config,
+};
+static const authz_provider authz_validuser_provider =
+{
+    &validuser_check_authorization,
+    NULL,
+};
+
+static void register_hooks(apr_pool_t *p)
+{
+    ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "user",
+                              AUTHZ_PROVIDER_VERSION,
+                              &authz_user_provider, AP_AUTH_INTERNAL_PER_CONF);
+    ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "valid-user",
+                              AUTHZ_PROVIDER_VERSION,
+                              &authz_validuser_provider,
+                              AP_AUTH_INTERNAL_PER_CONF);
+}
+
+AP_DECLARE_MODULE(authz_user) =
+{
+    STANDARD20_MODULE_STUFF,
+    create_authz_user_dir_config, /* dir config creater */
+    NULL,                         /* dir merger --- default is to override */
+    NULL,                         /* server config */
+    NULL,                         /* merge server config */
+    authz_user_cmds,              /* command apr_table_t */
+    register_hooks                /* register hooks */
+};