#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 map_to_local;
+ bool gss_conn_ctx;
gss_key_value_set_desc cred_store;
};
return apr_psprintf(req->pool, "%s: [%s (%s)]", msg, msg_maj, msg_min);
}
+static APR_OPTIONAL_FN_TYPE(ssl_is_https) *mag_is_https = NULL;
+
+static int mag_post_config(apr_pool_t *cfg, apr_pool_t *log,
+ apr_pool_t *temp, server_rec *s)
+{
+ /* FIXME: create mutex to deal with connections and contexts ? */
+ mag_is_https = APR_RETRIEVE_OPTIONAL_FN(ssl_is_https);
+
+ return OK;
+}
+
+
+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 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;
char *auth_header_value;
int ret = HTTP_UNAUTHORIZED;
gss_ctx_id_t ctx = GSS_C_NO_CONTEXT;
+ gss_ctx_id_t *pctx;
gss_buffer_desc input = GSS_C_EMPTY_BUFFER;
gss_buffer_desc output = GSS_C_EMPTY_BUFFER;
gss_buffer_desc name = GSS_C_EMPTY_BUFFER;
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);
if (cfg->ssl_only) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
- "FIXME: check for ssl!");
+ 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;
+ }
+ pctx = &mc->ctx;
+ } else {
+ pctx = &ctx;
}
auth_header = apr_table_get(req->headers_in, "Authorization");
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,
+ maj = gss_accept_sec_context(&min, pctx, 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);
- }
-
- maj = gss_display_name(&min, client, &name, NULL);
- if (GSS_ERROR(maj)) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
- mag_error(req, "gss_accept_sec_context() failed",
- maj, min));
+ if (maj == GSS_S_CONTINUE_NEEDED) {
+ if (!cfg->gss_conn_ctx) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, req,
+ "Mechanism needs continuation but "
+ "GSSConnectionContext is off.");
+ gss_delete_sec_context(&min, pctx, GSS_C_NO_BUFFER);
+ gss_release_buffer(&min, &output);
+ output.length = 0;
+ }
goto done;
}
+ /* once the connection has been accepted we do not need the context
+ * anymore, discard it. FIXME: we also need a destructor for those
+ * mechanisms (like NTLMSSP) that do not complete in one step */
+ gss_delete_sec_context(&min, pctx, GSS_C_NO_BUFFER);
+
#ifdef HAVE_GSS_STORE_CRED_INTO
if (cfg->cred_store && delegated_cred != GSS_C_NO_CREDENTIAL) {
gss_key_value_set_desc store = {0, NULL};
#endif
req->ap_auth_type = apr_pstrdup(req->pool, "Negotiate");
- req->user = apr_pstrndup(req->pool, name.value, name.length);
+
+ /* 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,
+ mag_error(req, "gss_accept_sec_context() failed",
+ 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;
+ }
+
+ if (mc) {
+ mc->user_name = apr_pstrdup(req->connection->pool, req->user);
+ mc->gss_name = apr_pstrdup(req->connection->pool, clientname);
+ mc->established = true;
+ }
+
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);
+ 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_map_to_local(cmd_parms *parms, void *mconfig, int on)
+{
+ struct mag_config *cfg = (struct mag_config *)mconfig;
+ 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)
{
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("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_post_config(mag_post_config, 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