diff options
Diffstat (limited to 'modules/aaa/mod_authn_file.c')
| -rw-r--r-- | modules/aaa/mod_authn_file.c | 194 |
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 */ +}; |