#ifdef KRB5
#include <krb5.h>
+#include <gssapi.h>
#endif /* KRB5 */
#ifdef KRB4
#endif /* KRB5 */
int krb_save_credentials;
char *krb_tmp_dir;
+ char *service_name;
} kerb_auth_config;
+typedef struct {
+ gss_ctx_id_t context;
+ gss_cred_id_t server_creds;
+} gss_connection_t;
+
+static gss_connection_t *gss_connection = NULL;
+
+static void
+cleanup_gss_connection(void *data)
+{
+ OM_uint32 minor_status;
+ gss_connection_t *gss_conn = (gss_connection_t *)data;
+
+ if (data == NULL)
+ return;
+ if (gss_conn->context != GSS_C_NO_CONTEXT)
+ gss_delete_sec_context(&minor_status, &gss_conn->context,
+ GSS_C_NO_BUFFER);
+ if (gss_conn->server_creds != GSS_C_NO_CREDENTIAL)
+ gss_release_cred(&minor_status, &gss_conn->server_creds);
+}
const char *arg)
{
int offset = (int) (long) cmd->info;
- if
#ifdef KRB5
- (!strncasecmp(arg, "v5", 2))
+ if (!strncasecmp(arg, "v5", 2))
*(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosV5");
- else if
+ else
#endif /* KRB5 */
#ifdef KRB4
- (!strncasecmp(arg, "v4", 2))
+ if (!strncasecmp(arg, "v4", 2))
*(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosV4");
+ else
#endif /* KRB4 */
- else if
- (!strncasecmp(arg, "dualv5v4", 8))
+ if (!strncasecmp(arg, "dualv5v4", 8))
*(char **) ((char *)struct_ptr + offset) = MK_PSTRDUP(cmd->pool, "KerberosDualV5V4");
else if
(!strncasecmp(arg, "dualv4v5", 8))
krb5_deltat renewal = 0;
krb5_flags options = 0;
krb5_data tgtname = {
+#ifndef HEIMDAL
0,
+#endif
KRB5_TGS_NAME_SIZE,
KRB5_TGS_NAME
};
return 0;
my_creds.client = me;
+#ifdef HEIMDAL
+#else
if (krb5_build_principal_ext(kcontext, &server,
krb5_princ_realm(kcontext, me)->length,
krb5_princ_realm(kcontext, me)->data,
0)) {
return 0;
}
+#endif
my_creds.server = server;
if (krb5_timeofday(kcontext, &now))
return 0;
}
#endif /* KRB4 */
+static int
+get_gss_creds(request_rec *r,
+ kerb_auth_config *conf,
+ gss_cred_id_t *server_creds)
+{
+ int ret = 0;
+ gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ OM_uint32 major_status, minor_status;
+ gss_name_t server_name = GSS_C_NO_NAME;
+
+ if (conf->service_name) {
+ input_token.value = conf->service_name;
+ input_token.length = strlen(conf->service_name) + 1;
+ }
+ else {
+ input_token.value = "khttp";
+ input_token.length = 6;
+ }
+ major_status = gss_import_name(&minor_status, &input_token,
+ (conf->service_name) ?
+ GSS_C_NT_USER_NAME : GSS_C_NT_HOSTBASED_SERVICE,
+ &server_name);
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_import_name() failed"));
+ ret = SERVER_ERROR;
+ goto fail;
+ }
+
+#ifdef KRB5
+ if (conf->krb_5_keytab)
+ setenv("KRB5_KTNAME", conf->krb_5_keytab, 1);
+#endif
+ major_status = gss_acquire_cred(&minor_status, server_name, GSS_C_INDEFINITE,
+ GSS_C_NO_OID_SET, GSS_C_ACCEPT,
+ server_creds, NULL, NULL);
+#ifdef KRB5
+ if (conf->krb_5_keytab)
+ unsetenv("KRB5_KTNAME");
+#endif
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_acquire_cred() failed"));
+ ret = SERVER_ERROR;
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ /* XXX cleanup */
+
+ return ret;
+}
+
+static int
+negotiate_authenticate_user(request_rec *r,
+ kerb_auth_config *conf,
+ const char *auth_line)
+{
+ OM_uint32 major_status, minor_status, minor_status2;
+ gss_buffer_desc input_token = GSS_C_EMPTY_BUFFER;
+ gss_buffer_desc output_token = GSS_C_EMPTY_BUFFER;
+ const char *auth_param = NULL;
+ krb5_context krb_ctx = NULL;
+ int ret;
+ gss_name_t client_name = GSS_C_NO_NAME;
+ gss_cred_id_t delegated_cred = GSS_C_NO_CREDENTIAL;
+ char *p;
+
+ if (gss_connection == NULL) {
+ gss_connection = ap_pcalloc(r->connection->pool, sizeof(*gss_connection));
+ if (gss_connection == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "ap_pcalloc() failed");
+ ret = SERVER_ERROR;
+ goto end;
+ }
+ memset(gss_connection, 0, sizeof(*gss_connection));
+ ap_register_cleanup(r->connection->pool, gss_connection, cleanup_gss_connection, ap_null_cleanup);
+ }
+
+ if (gss_connection->server_creds == GSS_C_NO_CREDENTIAL) {
+ ret = get_gss_creds(r, conf, &gss_connection->server_creds);
+ if (ret)
+ goto end;
+ }
+
+ /* ap_getword() shifts parameter */
+ auth_param = ap_getword_white(r->pool, &auth_line);
+ if (auth_param == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "No Authorization parameter from client");
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ input_token.length = ap_base64decode_len(auth_param);
+ input_token.value = ap_pcalloc(r->connection->pool, input_token.length);
+ if (input_token.value == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "Not enough memory");
+ ret = SERVER_ERROR;
+ goto end;
+ }
+ input_token.length = ap_base64decode(input_token.value, auth_param);
+
+ major_status = gss_accept_sec_context(&minor_status,
+ &gss_connection->context,
+ gss_connection->server_creds,
+ &input_token,
+ GSS_C_NO_CHANNEL_BINDINGS,
+ &client_name,
+ NULL,
+ &output_token,
+ NULL,
+ NULL,
+ &delegated_cred);
+ if (output_token.length) {
+ char *token = NULL;
+ size_t len;
+
+ len = ap_base64encode_len(output_token.length);
+ token = ap_pcalloc(r->connection->pool, len + 1);
+ if (token == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "Not enough memory");
+ ret = SERVER_ERROR;
+ gss_release_buffer(&minor_status2, &output_token);
+ goto end;
+ }
+ ap_base64encode(token, output_token.value, output_token.length);
+ token[len] = '\0';
+ ap_table_set(r->err_headers_out, "WWW-Authenticate",
+ ap_pstrcat(r->pool, "GSS-Negotiate ", token, NULL));
+ free(token);
+ gss_release_buffer(&minor_status2, &output_token);
+ }
+
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_accept_sec_context() failed"));
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ if (major_status & GSS_S_CONTINUE_NEEDED) {
+#if 0
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "only one authentication iteration allowed");
+#endif
+ ret = HTTP_UNAUTHORIZED;
+ goto end;
+ }
+
+ major_status = gss_export_name(&minor_status, client_name, &output_token);
+ gss_release_name(&minor_status, &client_name);
+ if (GSS_ERROR(major_status)) {
+ ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, r,
+ "%s", get_gss_error(r->pool, minor_status,
+ "gss_export_name() failed"));
+ ret = SERVER_ERROR;
+ goto end;
+ }
+
+ r->connection->ap_auth_type = "Negotiate";
+ r->connection->user = ap_pstrdup(r->pool, output_token.value);
+#if 0
+ /* If the user comes from a realm specified by configuration don't include
+ its realm name in the username so that the authorization routine could
+ work for both Password-based and Ticket-based authentication. It's
+ administrators responsibility to include only such realm that have
+ unified principal instances, i.e. if the same principal name occures in
+ multiple realms, it must be always assigned to a single user.
+ */
+ p = strchr(r->connection->user, '@');
+ if (p != NULL) {
+ const char *realms = conf->gss_krb5_realms;
+
+ while (realms && *realms) {
+ if (strcmp(p+1, ap_getword_white(r->pool, &realms)) == 0) {
+ *p = '\0';
+ break;
+ }
+ }
+ }
+#endif
+
+ gss_release_buffer(&minor_status, &output_token);
+
+#if 0
+ /* This should be only done if afs token are requested or gss_save creds is
+ * specified */
+ /* gss_export_cred() from the GGF GSS Extensions could be used */
+ if (delegated_cred != GSS_C_NO_CREDENTIAL &&
+ (conf->gss_save_creds || (conf->gss_krb5_cells && k_hasafs()))) {
+ krb5_init_context(&krb_ctx);
+ do_afs_log(krb_ctx, r, delegated_cred->ccache, conf->gss_krb5_cells);
+ ret = store_krb5_creds(krb_ctx, r, conf, delegated_cred->ccache);
+ krb5_free_context(krb_ctx);
+ if (ret)
+ goto end;
+ }
+#endif
+ ret = OK;
+
+end:
+ if (delegated_cred)
+ gss_release_cred(&minor_status, &delegated_cred);
+
+ if (output_token.length)
+ gss_release_buffer(&minor_status, &output_token);
+
+ if (client_name != GSS_C_NO_NAME)
+ gss_release_name(&minor_status, &client_name);
+
+ return ret;
+}
/***************************************************************************
projects / mod_auth_kerb.cvs / .git / commitdiff