#include <stdbool.h>
#include <stdint.h>
#include <gssapi/gssapi.h>
+#include <gssapi/gssapi_ext.h>
#include <httpd.h>
#include <http_core.h>
+#include <http_connection.h>
#include <http_log.h>
#include <http_request.h>
#include <apr_strings.h>
#include <apr_base64.h>
-module AP_MODULE_DECLARE_DATA mag_module;
+module AP_MODULE_DECLARE_DATA auth_gssapi_module;
+
+APR_DECLARE_OPTIONAL_FN(int, ssl_is_https, (conn_rec *));
struct mag_config {
bool ssl_only;
- bool save_creds;
+ bool map_to_local;
+ bool gss_conn_ctx;
+ gss_key_value_set_desc cred_store;
};
static char *mag_status(request_rec *req, int type, uint32_t err)
return apr_psprintf(req->pool, "%s: [%s (%s)]", msg, msg_maj, msg_min);
}
+struct mag_conn {
+ gss_ctx_id_t ctx;
+ bool established;
+ char *user_name;
+ char *gss_name;
+};
+
+static int mag_pre_connection(conn_rec *c, void *csd)
+{
+ struct mag_conn *mc;
+
+ mc = apr_pcalloc(c->pool, sizeof(struct mag_conn));
+ if (!mc) return DECLINED;
+
+ ap_set_module_config(c->conn_config, &auth_gssapi_module, (void*)mc);
+ return OK;
+}
+
+static APR_OPTIONAL_FN_TYPE(ssl_is_https) *mag_is_https = NULL;
+
+static bool mag_conn_is_https(conn_rec *c)
+{
+ if (mag_is_https) {
+ if (mag_is_https(c)) return true;
+ }
+
+ return false;
+}
+
static int mag_auth(request_rec *req)
{
const char *type;
uint32_t maj, min;
char *reply;
size_t replen;
+ char *clientname;
+ gss_OID mech_type = GSS_C_NO_OID;
+ gss_buffer_desc lname = GSS_C_EMPTY_BUFFER;
+ struct mag_conn *mc = NULL;
type = ap_auth_type(req);
if ((type == NULL) || (strcasecmp(type, "GSSAPI") != 0)) {
return DECLINED;
}
- cfg = ap_get_module_config(req->per_dir_config, &mag_module);
+ cfg = ap_get_module_config(req->per_dir_config, &auth_gssapi_module);
- /* FIXME: Checks for ssl only configuration */
+ if (cfg->ssl_only) {
+ if (!mag_conn_is_https(req->connection)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "Not a TLS connection, refusing to authenticate!");
+ goto done;
+ }
+ }
+
+ if (cfg->gss_conn_ctx) {
+ mc = (struct mag_conn *)ap_get_module_config(
+ req->connection->conn_config,
+ &auth_gssapi_module);
+ if (!mc) {
+ return DECLINED;
+ }
+ if (mc->established) {
+ ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, req,
+ "Connection bound pre-authentication found.");
+ apr_table_set(req->subprocess_env, "GSS_NAME", mc->gss_name);
+ req->ap_auth_type = apr_pstrdup(req->pool, "Negotiate");
+ req->user = apr_pstrdup(req->pool, mc->user_name);
+ ret = OK;
+ goto done;
+ } else {
+ ctx = mc->ctx;
+ }
+ }
auth_header = apr_table_get(req->headers_in, "Authorization");
if (!auth_header) goto done;
if (!input.value) goto done;
input.length = apr_base64_decode(input.value, auth_header_value);
- /* FIXME: this works only with "one-roundtrip" gssapi auth for now,
- * should work with Krb, will fail with NTLMSSP */
maj = gss_accept_sec_context(&min, &ctx, GSS_C_NO_CREDENTIAL,
&input, GSS_C_NO_CHANNEL_BINDINGS,
- &client, NULL, &output, &flags, NULL,
+ &client, &mech_type, &output, &flags, NULL,
&delegated_cred);
if (GSS_ERROR(maj)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
goto done;
}
- if (output.length) {
- replen = apr_base64_encode_len(output.length) + 1;
- reply = apr_pcalloc(req->pool, 10 + replen);
- if (!reply) goto done;
- memcpy(reply, "Negotiate ", 10);
- apr_base64_encode(&reply[10], output.value, output.length);
- reply[replen] = '\0';
- apr_table_add(req->err_headers_out, "WWW-Authenticate", reply);
+ if (mc) {
+ mc->ctx = ctx;
+ ctx = GSS_C_NO_CONTEXT;
+ }
+
+ if (maj == GSS_S_CONTINUE_NEEDED) goto done;
+
+#ifdef HAVE_GSS_STORE_CRED_INTO
+ if (cfg->cred_store && delegated_cred != GSS_C_NO_CREDENTIAL) {
+ gss_key_value_set_desc store = {0, NULL};
+ /* FIXME: run substtutions */
+
+ maj = gss_store_cred_into(&min, delegated_cred, GSS_C_INITIATE,
+ GSS_C_NULL_OID, 1, 1, &store, NULL, NULL);
}
+#endif
+
+ req->ap_auth_type = apr_pstrdup(req->pool, "Negotiate");
+ /* Always set the GSS name in an env var */
maj = gss_display_name(&min, client, &name, NULL);
if (GSS_ERROR(maj)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
maj, min));
goto done;
}
+ clientname = apr_pstrndup(req->pool, name.value, name.length);
+ apr_table_set(req->subprocess_env, "GSS_NAME", clientname);
+
+ if (cfg->map_to_local) {
+ maj = gss_localname(&min, client, mech_type, &lname);
+ if (maj != GSS_S_COMPLETE) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ mag_error(req, "gss_localname() failed", maj, min));
+ goto done;
+ }
+ req->user = apr_pstrndup(req->pool, lname.value, lname.length);
+ } else {
+ req->user = clientname;
+ }
- /* FIXME: save creds */
+ if (mc) {
+ mc->user_name = apr_pstrdup(req->connection->pool, req->user);
+ mc->gss_name = apr_pstrdup(req->connection->pool, clientname);
+ mc->established = true;
+ }
- req->ap_auth_type = "Negotiate";
- req->user = apr_pstrndup(req->pool, name.value, name.length);
ret = OK;
done:
if (ret == HTTP_UNAUTHORIZED) {
- apr_table_add(req->err_headers_out, "WWW-Authenticate", "Negotiate");
+ if (output.length != 0) {
+ replen = apr_base64_encode_len(output.length) + 1;
+ reply = apr_pcalloc(req->pool, 10 + replen);
+ if (reply) {
+ memcpy(reply, "Negotiate ", 10);
+ apr_base64_encode(&reply[10], output.value, output.length);
+ reply[replen] = '\0';
+ apr_table_add(req->err_headers_out,
+ "WWW-Authenticate", reply);
+ }
+ } else {
+ apr_table_add(req->err_headers_out,
+ "WWW-Authenticate", "Negotiate");
+ }
}
gss_release_cred(&min, &delegated_cred);
gss_release_buffer(&min, &output);
gss_release_name(&min, &client);
gss_release_buffer(&min, &name);
gss_delete_sec_context(&min, &ctx, GSS_C_NO_BUFFER);
+ gss_release_buffer(&min, &lname);
return ret;
}
return NULL;
}
-static const char *mag_save_creds(cmd_parms *parms, void *mconfig, int on)
+static const char *mag_map_to_local(cmd_parms *parms, void *mconfig, int on)
{
struct mag_config *cfg = (struct mag_config *)mconfig;
- cfg->save_creds = on ? true : false;
+ cfg->map_to_local = on ? true : false;
+ return NULL;
+}
+
+static const char *mag_conn_ctx(cmd_parms *parms, void *mconfig, int on)
+{
+ struct mag_config *cfg = (struct mag_config *)mconfig;
+ cfg->gss_conn_ctx = on ? true : false;
+ return NULL;
+}
+
+static const char *mag_cred_store(cmd_parms *parms, void *mconfig,
+ const char *w)
+{
+ struct mag_config *cfg = (struct mag_config *)mconfig;
+ gss_key_value_element_desc *elements;
+ uint32_t count;
+ size_t size;
+ const char *p;
+ char *value;
+ char *key;
+
+ p = strchr(w, ':');
+ if (!p) {
+ ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, parms->server,
+ "%s [%s]", "Invalid syntax for GSSCredStore option", w);
+ return NULL;
+ }
+
+ key = apr_pstrndup(parms->pool, w, (p-w));
+ value = apr_pstrdup(parms->pool, p + 1);
+ if (!key || !value) {
+ ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, parms->server,
+ "%s", "OOM handling GSSCredStore option");
+ return NULL;
+ }
+
+ size = sizeof(gss_key_value_element_desc) * cfg->cred_store.count + 1;
+ elements = apr_palloc(parms->pool, size);
+ if (!elements) {
+ ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, parms->server,
+ "%s", "OOM handling GSSCredStore option");
+ return NULL;
+ }
+
+ for (count = 0; count < cfg->cred_store.count; count++) {
+ elements[count] = cfg->cred_store.elements[count];
+ }
+ elements[count].key = key;
+ elements[count].value = value;
+
+ cfg->cred_store.elements = elements;
+ cfg->cred_store.count = count;
+
return NULL;
}
static const command_rec mag_commands[] = {
AP_INIT_FLAG("GSSSSLOnly", mag_ssl_only, NULL, OR_AUTHCFG,
"Work only if connection is SSL Secured"),
- AP_INIT_FLAG("GSSSaveCreds", mag_save_creds, NULL, OR_AUTHCFG,
- "Save credentials"),
+ AP_INIT_FLAG("GSSLocalName", mag_map_to_local, NULL, OR_AUTHCFG,
+ "Work only if connection is SSL Secured"),
+ AP_INIT_FLAG("GSSConnectionContext", mag_conn_ctx, NULL, OR_AUTHCFG,
+ "Authentication is valid for the life of the connection"),
+ AP_INIT_ITERATE("GSSCredStore", mag_cred_store, NULL, OR_AUTHCFG,
+ "Credential Store"),
{ NULL }
};
mag_register_hooks(apr_pool_t *p)
{
ap_hook_check_user_id(mag_auth, NULL, NULL, APR_HOOK_MIDDLE);
+ ap_hook_pre_connection(mag_pre_connection, NULL, NULL, APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA auth_gssapi_module =
projects / mod_auth_gssapi.git / blobdiff