Adding upstream version 2.4.57.upstream/2.4.57upstream

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

1 files changed, 215 insertions, 0 deletions

diff --git a/modules/aaa/mod_authn_anon.c b/modules/aaa/mod_authn_anon.c
new file mode 100644
index 0000000..82559bc
--- /dev/null
+++ b/modules/aaa/mod_authn_anon.c
@@ -0,0 +1,215 @@
+/* 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.
+ */
+
+/*
+ * Adapted to allow anonymous logins, just like with Anon-FTP, when
+ * one gives the magic user name 'anonymous' and ones email address
+ * as the password.
+ *
+ * Just add the following tokes to your <directory> setup:
+ *
+ * Anonymous                    magic-userid [magic-userid]...
+ *
+ * Anonymous_MustGiveEmail      [ on | off ] default = on
+ * Anonymous_LogEmail           [ on | off ] default = on
+ * Anonymous_VerifyEmail        [ on | off ] default = off
+ * Anonymous_NoUserId           [ on | off ] default = off
+ *
+ * The magic user id is something like 'anonymous', it is NOT case sensitive.
+ *
+ * The MustGiveEmail flag can be used to force users to enter something
+ * in the password field (like an email address). Default is on.
+ *
+ * Furthermore the 'NoUserID' flag can be set to allow completely empty
+ * usernames in as well; this can be is convenient as a single return
+ * in broken GUIs like W95 is often given by the user. The Default is off.
+ *
+ * Dirk.vanGulik@jrc.it; http://ewse.ceo.org; http://me-www.jrc.it/~dirkx
+ *
+ */
+
+#include "apr_strings.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "ap_provider.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "http_request.h"
+#include "http_protocol.h"
+
+#include "mod_auth.h"
+
+typedef struct anon_auth_user {
+    const char *user;
+    struct anon_auth_user *next;
+} anon_auth_user;
+
+typedef struct {
+    anon_auth_user *users;
+    int nouserid;
+    int logemail;
+    int verifyemail;
+    int mustemail;
+    int anyuserid;
+} authn_anon_config_rec;
+
+static void *create_authn_anon_dir_config(apr_pool_t *p, char *d)
+{
+    authn_anon_config_rec *conf = apr_palloc(p, sizeof(*conf));
+
+    /* just to illustrate the defaults really. */
+    conf->users = NULL;
+
+    conf->nouserid = 0;
+    conf->anyuserid = 0;
+    conf->logemail = 1;
+    conf->verifyemail = 0;
+    conf->mustemail = 1;
+    return conf;
+}
+
+static const char *anon_set_string_slots(cmd_parms *cmd,
+                                         void *my_config, const char *arg)
+{
+    authn_anon_config_rec *conf = my_config;
+    anon_auth_user *first;
+
+    if (!*arg) {
+        return "Anonymous string cannot be empty, use Anonymous_NoUserId";
+    }
+
+    /* squeeze in a record */
+    if (!conf->anyuserid) {
+        if (!strcmp(arg, "*")) {
+            conf->anyuserid = 1;
+        }
+        else {
+            first = conf->users;
+            conf->users = apr_palloc(cmd->pool, sizeof(*conf->users));
+            conf->users->user = arg;
+            conf->users->next = first;
+        }
+    }
+
+    return NULL;
+}
+
+static const command_rec authn_anon_cmds[] =
+{
+    AP_INIT_ITERATE("Anonymous", anon_set_string_slots, NULL, OR_AUTHCFG,
+     "a space-separated list of user IDs"),
+    AP_INIT_FLAG("Anonymous_MustGiveEmail", ap_set_flag_slot,
+     (void *)APR_OFFSETOF(authn_anon_config_rec, mustemail),
+     OR_AUTHCFG, "Limited to 'on' or 'off'"),
+    AP_INIT_FLAG("Anonymous_NoUserId", ap_set_flag_slot,
+     (void *)APR_OFFSETOF(authn_anon_config_rec, nouserid),
+     OR_AUTHCFG, "Limited to 'on' or 'off'"),
+    AP_INIT_FLAG("Anonymous_VerifyEmail", ap_set_flag_slot,
+     (void *)APR_OFFSETOF(authn_anon_config_rec, verifyemail),
+     OR_AUTHCFG, "Limited to 'on' or 'off'"),
+    AP_INIT_FLAG("Anonymous_LogEmail", ap_set_flag_slot,
+     (void *)APR_OFFSETOF(authn_anon_config_rec, logemail),
+     OR_AUTHCFG, "Limited to 'on' or 'off'"),
+    {NULL}
+};
+
+module AP_MODULE_DECLARE_DATA authn_anon_module;
+
+static authn_status check_anonymous(request_rec *r, const char *user,
+                                    const char *sent_pw)
+{
+    authn_anon_config_rec *conf = ap_get_module_config(r->per_dir_config,
+                                                      &authn_anon_module);
+    authn_status res = AUTH_USER_NOT_FOUND;
+
+    /* Ignore if we are not configured */
+    if (!conf->users && !conf->anyuserid) {
+        return AUTH_USER_NOT_FOUND;
+    }
+
+    /* Do we allow an empty userID and/or is it the magic one
+     */
+    if (!*user) {
+        if (conf->nouserid) {
+            res = AUTH_USER_FOUND;
+        }
+    }
+    else if (conf->anyuserid) {
+        res = AUTH_USER_FOUND;
+    }
+    else {
+        anon_auth_user *p = conf->users;
+
+        while (p) {
+            if (!strcasecmp(user, p->user)) {
+                res = AUTH_USER_FOUND;
+                break;
+            }
+            p = p->next;
+        }
+    }
+
+    /* Now if the supplied user-ID was ok, grant access if:
+     * (a) no passwd was sent and no password and no verification
+     *     were configured.
+     * (b) password was sent and no verification was configured
+     * (c) verification was configured and the password (sent or not)
+     *     looks like an email address
+     */
+    if (   (res == AUTH_USER_FOUND)
+        && (!conf->mustemail || *sent_pw)
+        && (   !conf->verifyemail
+            || (ap_strchr_c(sent_pw, '@') && ap_strchr_c(sent_pw, '.'))))
+    {
+        if (conf->logemail && ap_is_initial_req(r)) {
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, APR_SUCCESS, r, APLOGNO(01672)
+                          "Anonymous: Passwd <%s> Accepted",
+                          sent_pw ? sent_pw : "\'none\'");
+        }
+
+        return AUTH_GRANTED;
+    }
+
+    return (res == AUTH_USER_NOT_FOUND ? res : AUTH_DENIED);
+}
+
+static const authn_provider authn_anon_provider =
+{
+    &check_anonymous,
+    NULL
+};
+
+static void register_hooks(apr_pool_t *p)
+{
+    ap_register_auth_provider(p, AUTHN_PROVIDER_GROUP, "anon",
+                              AUTHN_PROVIDER_VERSION,
+                              &authn_anon_provider, AP_AUTH_INTERNAL_PER_CONF);
+}
+
+AP_DECLARE_MODULE(authn_anon) =
+{
+    STANDARD20_MODULE_STUFF,
+    create_authn_anon_dir_config, /* dir config creater */
+    NULL,                         /* dir merger ensure strictness */
+    NULL,                         /* server config */
+    NULL,                         /* merge server config */
+    authn_anon_cmds,              /* command apr_table_t */
+    register_hooks                /* register hooks */
+};