mod_authz_owner.c revision 2e242dca7111f99d54dd144b7b8418d88d560032
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski/* Licensed to the Apache Software Foundation (ASF) under one or more
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski * contributor license agreements. See the NOTICE file distributed with
c06dd8856a03b72f6b3f69e874f8700f10cb8522Christian Maeder * this work for additional information regarding copyright ownership.
7bf4436b6f9987b070033a323757b206c898c1beChristian Maeder * The ASF licenses this file to You under the Apache License, Version 2.0
97018cf5fa25b494adffd7e9b4e87320dae6bf47Christian Maeder * (the "License"); you may not use this file except in compliance with
c06dd8856a03b72f6b3f69e874f8700f10cb8522Christian Maeder * the License. You may obtain a copy of the License at
ae17d457c2d00d47d65e8cd510c3fd21b9516ccbTill Mossakowski *
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski * http://www.apache.org/licenses/LICENSE-2.0
7bf4436b6f9987b070033a323757b206c898c1beChristian Maeder *
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder * Unless required by applicable law or agreed to in writing, software
f3a94a197960e548ecd6520bb768cb0d547457bbChristian Maeder * distributed under the License is distributed on an "AS IS" BASIS,
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
679d3f541f7a9ede4079e045f7758873bb901872Till Mossakowski * See the License for the specific language governing permissions and
679d3f541f7a9ede4079e045f7758873bb901872Till Mossakowski * limitations under the License.
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski */
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski#include "apr_strings.h"
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder#include "apr_file_info.h"
9d34a8049237647d0188ee2ec88db2dc45f1f848Till Mossakowski#include "apr_user.h"
9d34a8049237647d0188ee2ec88db2dc45f1f848Till Mossakowski
9d34a8049237647d0188ee2ec88db2dc45f1f848Till Mossakowski#include "ap_config.h"
9d34a8049237647d0188ee2ec88db2dc45f1f848Till Mossakowski#include "ap_provider.h"
82d681fe6950e2a35f28fdefb874d060632faccaTill Mossakowski#include "httpd.h"
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski#include "http_config.h"
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski#include "http_core.h"
e3c9174a782e90f965a0b080c22861c3ef5af12dTill Mossakowski#include "http_log.h"
70e2af8d4bf21bcdfb53e9a0414e27173b577a1eTill Mossakowski#include "http_protocol.h"
70e2af8d4bf21bcdfb53e9a0414e27173b577a1eTill Mossakowski#include "http_request.h"
2b4130336e941b7d01c78a6da55449a4c6eca609Till Mossakowski
2b4130336e941b7d01c78a6da55449a4c6eca609Till Mossakowski#include "mod_auth.h" /* for AUTHZ_GROUP_NOTE */
2b4130336e941b7d01c78a6da55449a4c6eca609Till Mossakowski
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian MaederAPR_DECLARE_OPTIONAL_FN(char*, authz_owner_get_file_group, (request_rec *r));
82d681fe6950e2a35f28fdefb874d060632faccaTill Mossakowski
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maederstatic const command_rec authz_owner_cmds[] =
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder{
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder {NULL}
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder};
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maedermodule AP_MODULE_DECLARE_DATA authz_owner_module;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maederstatic authz_status fileowner_check_authorization(request_rec *r,
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder const char *require_args)
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder{
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder char *reason = NULL;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder apr_status_t status = 0;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder#if !APR_HAS_USER
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder reason = "'Require file-owner' is not supported on this platform.";
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
c529224e0ec191fbaa87261f05c34f89c17b3f3aTill Mossakowski "Authorization of user %s to access %s failed, reason: %s",
c529224e0ec191fbaa87261f05c34f89c17b3f3aTill Mossakowski r->user, r->uri, reason ? reason : "unknown");
02b3d9f81150bedd0916c2ffc637a14668e34097Till Mossakowski return AUTHZ_DENIED;
02b3d9f81150bedd0916c2ffc637a14668e34097Till Mossakowski#else /* APR_HAS_USER */
c529224e0ec191fbaa87261f05c34f89c17b3f3aTill Mossakowski char *owner = NULL;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder apr_finfo_t finfo;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder if (!r->filename) {
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder reason = "no filename available";
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder "Authorization of user %s to access %s failed, reason: %s",
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder r->user, r->uri, reason ? reason : "unknown");
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder return AUTHZ_DENIED;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder }
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder status = apr_stat(&finfo, r->filename, APR_FINFO_USER, r->pool);
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder if (status != APR_SUCCESS) {
bfa9e03532243ceb487f0384d0f6a447f1ce7670Till Mossakowski reason = apr_pstrcat(r->pool, "could not stat file ",
bfa9e03532243ceb487f0384d0f6a447f1ce7670Till Mossakowski r->filename, NULL);
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder "Authorization of user %s to access %s failed, reason: %s",
e3c9174a782e90f965a0b080c22861c3ef5af12dTill Mossakowski r->user, r->uri, reason ? reason : "unknown");
bfa9e03532243ceb487f0384d0f6a447f1ce7670Till Mossakowski return AUTHZ_DENIED;
8fe1a8e240ccd5f3682a936ef2fa4c22fee973bcTill Mossakowski }
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
c0380b947eef252db81ee562246bb732555427f4Till Mossakowski if (!(finfo.valid & APR_FINFO_USER)) {
c0380b947eef252db81ee562246bb732555427f4Till Mossakowski reason = "no file owner information available";
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski "Authorization of user %s to access %s failed, reason: %s",
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski r->user, r->uri, reason ? reason : "unknown");
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski return AUTHZ_DENIED;
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski }
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski status = apr_uid_name_get(&owner, finfo.user, r->pool);
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski if (status != APR_SUCCESS || !owner) {
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski reason = "could not get name of file owner";
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski "Authorization of user %s to access %s failed, reason: %s",
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder r->user, r->uri, reason ? reason : "unknown");
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder return AUTHZ_DENIED;
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski }
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder if (strcmp(owner, r->user)) {
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder reason = apr_psprintf(r->pool, "file owner %s does not match.",
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski owner);
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder "Authorization of user %s to access %s failed, reason: %s",
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder r->user, r->uri, reason ? reason : "unknown");
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder return AUTHZ_DENIED;
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder }
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski /* this user is authorized */
1bb1684c83317dfd1692ab53415027b67d8f2faeTill Mossakowski return AUTHZ_GRANTED;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder#endif /* APR_HAS_USER */
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder}
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maederstatic char *authz_owner_get_file_group(request_rec *r)
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder{
587fb54160b66128cf17e4c9bca7494a7f2c3c4aChristian Maeder char *reason = NULL;
587fb54160b66128cf17e4c9bca7494a7f2c3c4aChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder /* file-group only figures out the file's group and lets
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder * other modules do the actual authorization (against a group file/db).
43b4c41fbb07705c9df321221ab9cb9832460407Christian Maeder * Thus, these modules have to hook themselves after
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder * mod_authz_owner and of course recognize 'file-group', too.
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder */
7bf4436b6f9987b070033a323757b206c898c1beChristian Maeder#if !APR_HAS_USER
e9249d3ecd51a2b6a966a58669953e58d703adc6Till Mossakowski return NULL;
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder#else /* APR_HAS_USER */
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder char *group = NULL;
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder apr_finfo_t finfo;
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder apr_status_t status = 0;
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder if (!r->filename) {
0799b5dc3f06d2640e66e9ab54b8b217348fd719Christian Maeder reason = "no filename available";
0c2a90cbfb63865ff485c3fbe20a14589a5914beTill Mossakowski ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
c616e681da8c052b62e14247fea522da099ac0e4Christian Maeder "Authorization of user %s to access %s failed, reason: %s",
88ece6e49930670e8fd3ee79c89a2e918d2fbd0cChristian Maeder r->user, r->uri, reason ? reason : "unknown");
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder return NULL;
ba904a15082557e939db689fcfba0c68c9a4f740Christian Maeder }
58b671de3fe578346fef9642ffa3c5a0a0edb3cbTill Mossakowski
c0380b947eef252db81ee562246bb732555427f4Till Mossakowski status = apr_stat(&finfo, r->filename, APR_FINFO_GROUP, r->pool);
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder if (status != APR_SUCCESS) {
0799b5dc3f06d2640e66e9ab54b8b217348fd719Christian Maeder reason = apr_pstrcat(r->pool, "could not stat file ",
de6c4edf5694b8bad67ecec910c492eaf1129dc8Christian Maeder r->filename, NULL);
de6c4edf5694b8bad67ecec910c492eaf1129dc8Christian Maeder ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
de6c4edf5694b8bad67ecec910c492eaf1129dc8Christian Maeder "Authorization of user %s to access %s failed, reason: %s",
de6c4edf5694b8bad67ecec910c492eaf1129dc8Christian Maeder r->user, r->uri, reason ? reason : "unknown");
0799b5dc3f06d2640e66e9ab54b8b217348fd719Christian Maeder return NULL;
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski }
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski if (!(finfo.valid & APR_FINFO_GROUP)) {
31c49f2fa23d4ac089f35145d80a224deb6ea7e4Till Mossakowski reason = "no file group information available";
b9804822fb178b0fc27ce967a6a8cedc42c5bf90Christian Maeder ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
6a57a555c8ef0a79aa5d20e1d721400dbffa564aMaciek Makowski "Authorization of user %s to access %s failed, reason: %s",
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder r->user, r->uri, reason ? reason : "unknown");
6a57a555c8ef0a79aa5d20e1d721400dbffa564aMaciek Makowski return NULL;
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder }
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder status = apr_gid_name_get(&group, finfo.group, r->pool);
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder if (status != APR_SUCCESS || !group) {
b9804822fb178b0fc27ce967a6a8cedc42c5bf90Christian Maeder reason = "could not get name of file group";
7bf4436b6f9987b070033a323757b206c898c1beChristian Maeder ap_log_rerror(APLOG_MARK, APLOG_ERR, status, r,
3476beb5baf84bef7cc7d627b130de9d48700399Christian Maeder "Authorization of user %s to access %s failed, reason: %s",
7297175957c5ad3c0498032190b1dee9ec5fb873Christian Maeder r->user, r->uri, reason ? reason : "unknown");
e379124f467e5d0ef7d3c0ca238bff0521f70831Till Mossakowski return NULL;
a89e661aad28f1b39f4fc9f9f9a4d46074234123Christian Maeder }
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski return group;
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski#endif /* APR_HAS_USER */
1b05bdb88b90d3c947351f262d7ae7d68f0a4a6fTill Mossakowski}
9d34a8049237647d0188ee2ec88db2dc45f1f848Till Mossakowski
b10d6cef708b7a659f2d3b367e8e0db0d03ae3f5Till Mossakowskistatic const authz_provider authz_fileowner_provider =
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder{
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder &fileowner_check_authorization,
4ea99e115bbade1632815267d5e0dcb9931aac1eChristian Maeder};
8a8880f1b6a0681e636480991d45dfea11d62ff8Christian Maeder
d290f2ee3d1a4d60c77c5dd06979453f3fa34fafJorina Freya Gerkenstatic void register_hooks(apr_pool_t *p)
d290f2ee3d1a4d60c77c5dd06979453f3fa34fafJorina Freya Gerken{
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder APR_REGISTER_OPTIONAL_FN(authz_owner_get_file_group);
0799b5dc3f06d2640e66e9ab54b8b217348fd719Christian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder ap_register_auth_provider(p, AUTHZ_PROVIDER_GROUP, "file-owner",
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder AUTHZ_PROVIDER_VERSION,
b10d6cef708b7a659f2d3b367e8e0db0d03ae3f5Till Mossakowski &authz_fileowner_provider,
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder AP_AUTH_INTERNAL_PER_CONF);
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder}
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maedermodule AP_MODULE_DECLARE_DATA authz_owner_module =
b9804822fb178b0fc27ce967a6a8cedc42c5bf90Christian Maeder{
e379124f467e5d0ef7d3c0ca238bff0521f70831Till Mossakowski STANDARD20_MODULE_STUFF,
b9804822fb178b0fc27ce967a6a8cedc42c5bf90Christian Maeder NULL, /* dir config creater */
e379124f467e5d0ef7d3c0ca238bff0521f70831Till Mossakowski NULL, /* dir merger --- default is to override */
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder NULL, /* server config */
95c3e5d11dcee331dc3876a9bf0c1d6daa38e2caChristian Maeder NULL, /* merge server config */
c0380b947eef252db81ee562246bb732555427f4Till Mossakowski authz_owner_cmds, /* command apr_table_t */
b9804822fb178b0fc27ce967a6a8cedc42c5bf90Christian Maeder register_hooks /* register hooks */
b9804822fb178b0fc27ce967a6a8cedc42c5bf90Christian Maeder};
52aad0502f0ddd332a28ae3fcd3327fa66d002f7Till Mossakowski