Adding upstream version 2.4.38.upstream/2.4.38

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 194 insertions, 0 deletions

diff --git a/modules/aaa/mod_authn_file.c b/modules/aaa/mod_authn_file.c
new file mode 100644
index 0000000..9909e44
--- /dev/null
+++ b/modules/aaa/mod_authn_file.c
@@ -0,0 +1,194 @@
+/* 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 "apr_md5.h"            /* for apr_password_validate */
+
+#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 {
+    char *pwfile;
+} authn_file_config_rec;
+
+static APR_OPTIONAL_FN_TYPE(ap_authn_cache_store) *authn_cache_store = NULL;
+#define AUTHN_CACHE_STORE(r,user,realm,data) \
+    if (authn_cache_store != NULL) \
+        authn_cache_store((r), "file", (user), (realm), (data))
+
+static void *create_authn_file_dir_config(apr_pool_t *p, char *d)
+{
+    authn_file_config_rec *conf = apr_palloc(p, sizeof(*conf));
+
+    conf->pwfile = NULL;     /* just to illustrate the default really */
+    return conf;
+}
+
+static const command_rec authn_file_cmds[] =
+{
+    AP_INIT_TAKE1("AuthUserFile", ap_set_file_slot,
+                  (void *)APR_OFFSETOF(authn_file_config_rec, pwfile),
+                  OR_AUTHCFG, "text file containing user IDs and passwords"),
+    {NULL}
+};
+
+module AP_MODULE_DECLARE_DATA authn_file_module;
+
+static authn_status check_password(request_rec *r, const char *user,
+                                   const char *password)
+{
+    authn_file_config_rec *conf = ap_get_module_config(r->per_dir_config,
+                                                       &authn_file_module);
+    ap_configfile_t *f;
+    char l[MAX_STRING_LEN];
+    apr_status_t status;
+    char *file_password = NULL;
+
+    if (!conf->pwfile) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01619)
+                      "AuthUserFile not specified in the configuration");
+        return AUTH_GENERAL_ERROR;
+    }
+
+    status = ap_pcfg_openfile(&f, r->pool, conf->pwfile);
+
+    if (status != APR_SUCCESS) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(01620)
+                      "Could not open password file: %s", conf->pwfile);
+        return AUTH_GENERAL_ERROR;
+    }
+
+    while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
+        const char *rpw, *w;
+
+        /* Skip # or blank lines. */
+        if ((l[0] == '#') || (!l[0])) {
+            continue;
+        }
+
+        rpw = l;
+        w = ap_getword(r->pool, &rpw, ':');
+
+        if (!strcmp(user, w)) {
+            file_password = ap_getword(r->pool, &rpw, ':');
+            break;
+        }
+    }
+    ap_cfg_closefile(f);
+
+    if (!file_password) {
+        return AUTH_USER_NOT_FOUND;
+    }
+    AUTHN_CACHE_STORE(r, user, NULL, file_password);
+
+    status = apr_password_validate(password, file_password);
+    if (status != APR_SUCCESS) {
+        return AUTH_DENIED;
+    }
+
+    return AUTH_GRANTED;
+}
+
+static authn_status get_realm_hash(request_rec *r, const char *user,
+                                   const char *realm, char **rethash)
+{
+    authn_file_config_rec *conf = ap_get_module_config(r->per_dir_config,
+                                                       &authn_file_module);
+    ap_configfile_t *f;
+    char l[MAX_STRING_LEN];
+    apr_status_t status;
+    char *file_hash = NULL;
+
+    if (!conf->pwfile) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01621)
+                      "AuthUserFile not specified in the configuration");
+        return AUTH_GENERAL_ERROR;
+    }
+
+    status = ap_pcfg_openfile(&f, r->pool, conf->pwfile);
+
+    if (status != APR_SUCCESS) {
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r, APLOGNO(01622)
+                      "Could not open password file: %s", conf->pwfile);
+        return AUTH_GENERAL_ERROR;
+    }
+
+    while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
+        const char *rpw, *w, *x;
+
+        /* Skip # or blank lines. */
+        if ((l[0] == '#') || (!l[0])) {
+            continue;
+        }
+
+        rpw = l;
+        w = ap_getword(r->pool, &rpw, ':');
+        x = ap_getword(r->pool, &rpw, ':');
+
+        if (x && w && !strcmp(user, w) && !strcmp(realm, x)) {
+            /* Remember that this is a md5 hash of user:realm:password.  */
+            file_hash = ap_getword(r->pool, &rpw, ':');
+            break;
+        }
+    }
+    ap_cfg_closefile(f);
+
+    if (!file_hash) {
+        return AUTH_USER_NOT_FOUND;
+    }
+
+    *rethash = file_hash;
+    AUTHN_CACHE_STORE(r, user, realm, file_hash);
+
+    return AUTH_USER_FOUND;
+}
+
+static const authn_provider authn_file_provider =
+{
+    &check_password,
+    &get_realm_hash,
+};
+
+static void opt_retr(void)
+{
+    authn_cache_store = APR_RETRIEVE_OPTIONAL_FN(ap_authn_cache_store);
+}
+static void register_hooks(apr_pool_t *p)
+{
+    ap_register_auth_provider(p, AUTHN_PROVIDER_GROUP, "file",
+                              AUTHN_PROVIDER_VERSION,
+                              &authn_file_provider, AP_AUTH_INTERNAL_PER_CONF);
+    ap_hook_optional_fn_retrieve(opt_retr, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+AP_DECLARE_MODULE(authn_file) =
+{
+    STANDARD20_MODULE_STUFF,
+    create_authn_file_dir_config,    /* dir config creater */
+    NULL,                            /* dir merger --- default is to override */
+    NULL,                            /* server config */
+    NULL,                            /* merge server config */
+    authn_file_cmds,                 /* command apr_table_t */
+    register_hooks                   /* register hooks */
+};