/*- * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ * Authors: Doug Rabson * Developed with Red Inc: Alfred Perlstein * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "gssd.h" #include "kgss_if.h" MALLOC_DEFINE(M_GSSAPI, "GSS-API", "GSS-API"); /* * Syscall hooks */ static int gssd_syscall_offset = SYS_gssd_syscall; static struct sysent gssd_syscall_prev_sysent; MAKE_SYSENT(gssd_syscall); static bool_t gssd_syscall_registered = FALSE; struct kgss_mech_list kgss_mechs; CLIENT *kgss_gssd_handle; struct mtx kgss_gssd_lock; static void kgss_init(void *dummy) { int error; LIST_INIT(&kgss_mechs); error = syscall_register(&gssd_syscall_offset, &gssd_syscall_sysent, &gssd_syscall_prev_sysent, SY_THR_STATIC_KLD); if (error) printf("Can't register GSSD syscall\n"); else gssd_syscall_registered = TRUE; } SYSINIT(kgss_init, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_init, NULL); static void kgss_uninit(void *dummy) { if (gssd_syscall_registered) syscall_deregister(&gssd_syscall_offset, &gssd_syscall_prev_sysent); } SYSUNINIT(kgss_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_uninit, NULL); int sys_gssd_syscall(struct thread *td, struct gssd_syscall_args *uap) { struct sockaddr_un sun; struct netconfig *nconf; char path[MAXPATHLEN]; int error; CLIENT *cl, *oldcl; error = priv_check(td, PRIV_NFS_DAEMON); if (error) return (error); error = copyinstr(uap->path, path, sizeof(path), NULL); if (error) return (error); if (path[0] != '\0') { sun.sun_family = AF_LOCAL; strcpy(sun.sun_path, path); sun.sun_len = SUN_LEN(&sun); nconf = getnetconfigent("local"); cl = clnt_reconnect_create(nconf, (struct sockaddr *) &sun, GSSD, GSSDVERS, RPC_MAXDATASIZE, RPC_MAXDATASIZE); } else cl = NULL; mtx_lock(&kgss_gssd_lock); oldcl = kgss_gssd_handle; kgss_gssd_handle = cl; mtx_unlock(&kgss_gssd_lock); if (oldcl != NULL) { CLNT_CLOSE(oldcl); CLNT_RELEASE(oldcl); } return (0); } int kgss_oid_equal(const gss_OID oid1, const gss_OID oid2) { if (oid1 == oid2) return (1); if (!oid1 || !oid2) return (0); if (oid1->length != oid2->length) return (0); if (memcmp(oid1->elements, oid2->elements, oid1->length)) return (0); return (1); } void kgss_install_mech(gss_OID mech_type, const char *name, struct kobj_class *cls) { struct kgss_mech *km; km = malloc(sizeof(struct kgss_mech), M_GSSAPI, M_WAITOK); km->km_mech_type = mech_type; km->km_mech_name = name; km->km_class = cls; LIST_INSERT_HEAD(&kgss_mechs, km, km_link); } void kgss_uninstall_mech(gss_OID mech_type) { struct kgss_mech *km; LIST_FOREACH(km, &kgss_mechs, km_link) { if (kgss_oid_equal(km->km_mech_type, mech_type)) { LIST_REMOVE(km, km_link); free(km, M_GSSAPI); return; } } } gss_OID kgss_find_mech_by_name(const char *name) { struct kgss_mech *km; LIST_FOREACH(km, &kgss_mechs, km_link) { if (!strcmp(km->km_mech_name, name)) { return (km->km_mech_type); } } return (GSS_C_NO_OID); } const char * kgss_find_mech_by_oid(const gss_OID oid) { struct kgss_mech *km; LIST_FOREACH(km, &kgss_mechs, km_link) { if (kgss_oid_equal(km->km_mech_type, oid)) { return (km->km_mech_name); } } return (NULL); } gss_ctx_id_t kgss_create_context(gss_OID mech_type) { struct kgss_mech *km; gss_ctx_id_t ctx; LIST_FOREACH(km, &kgss_mechs, km_link) { if (kgss_oid_equal(km->km_mech_type, mech_type)) break; } if (!km) return (NULL); ctx = (gss_ctx_id_t) kobj_create(km->km_class, M_GSSAPI, M_WAITOK); KGSS_INIT(ctx); return (ctx); } void kgss_delete_context(gss_ctx_id_t ctx, gss_buffer_t output_token) { KGSS_DELETE(ctx, output_token); kobj_delete((kobj_t) ctx, M_GSSAPI); } OM_uint32 kgss_transfer_context(gss_ctx_id_t ctx) { struct export_sec_context_res res; struct export_sec_context_args args; enum clnt_stat stat; OM_uint32 maj_stat; if (!kgss_gssd_handle) return (GSS_S_FAILURE); args.ctx = ctx->handle; bzero(&res, sizeof(res)); stat = gssd_export_sec_context_1(&args, &res, kgss_gssd_handle); if (stat != RPC_SUCCESS) { return (GSS_S_FAILURE); } maj_stat = KGSS_IMPORT(ctx, res.format, &res.interprocess_token); ctx->handle = 0; xdr_free((xdrproc_t) xdr_export_sec_context_res, &res); return (maj_stat); } void kgss_copy_buffer(const gss_buffer_t from, gss_buffer_t to) { to->length = from->length; if (from->length) { to->value = malloc(from->length, M_GSSAPI, M_WAITOK); bcopy(from->value, to->value, from->length); } else { to->value = NULL; } } /* * Acquire the kgss_gssd_handle and return it with a reference count, * if it is available. */ CLIENT * kgss_gssd_client(void) { CLIENT *cl; mtx_lock(&kgss_gssd_lock); cl = kgss_gssd_handle; if (cl != NULL) CLNT_ACQUIRE(cl); mtx_unlock(&kgss_gssd_lock); return (cl); } /* * Kernel module glue */ static int kgssapi_modevent(module_t mod, int type, void *data) { int error = 0; switch (type) { case MOD_LOAD: rpc_gss_entries.rpc_gss_refresh_auth = rpc_gss_refresh_auth; rpc_gss_entries.rpc_gss_secfind = rpc_gss_secfind; rpc_gss_entries.rpc_gss_secpurge = rpc_gss_secpurge; rpc_gss_entries.rpc_gss_seccreate = rpc_gss_seccreate; rpc_gss_entries.rpc_gss_set_defaults = rpc_gss_set_defaults; rpc_gss_entries.rpc_gss_max_data_length = rpc_gss_max_data_length; rpc_gss_entries.rpc_gss_get_error = rpc_gss_get_error; rpc_gss_entries.rpc_gss_mech_to_oid = rpc_gss_mech_to_oid; rpc_gss_entries.rpc_gss_oid_to_mech = rpc_gss_oid_to_mech; rpc_gss_entries.rpc_gss_qop_to_num = rpc_gss_qop_to_num; rpc_gss_entries.rpc_gss_get_mechanisms = rpc_gss_get_mechanisms; rpc_gss_entries.rpc_gss_get_versions = rpc_gss_get_versions; rpc_gss_entries.rpc_gss_is_installed = rpc_gss_is_installed; rpc_gss_entries.rpc_gss_set_svc_name = rpc_gss_set_svc_name; rpc_gss_entries.rpc_gss_clear_svc_name = rpc_gss_clear_svc_name; rpc_gss_entries.rpc_gss_getcred = rpc_gss_getcred; rpc_gss_entries.rpc_gss_set_callback = rpc_gss_set_callback; rpc_gss_entries.rpc_gss_clear_callback = rpc_gss_clear_callback; rpc_gss_entries.rpc_gss_get_principal_name = rpc_gss_get_principal_name; rpc_gss_entries.rpc_gss_svc_max_data_length = rpc_gss_svc_max_data_length; mtx_init(&kgss_gssd_lock, "kgss_gssd_lock", NULL, MTX_DEF); break; case MOD_UNLOAD: /* * Unloading of the kgssapi module is not currently supported. * If somebody wants this, we would need to keep track of * currently executing threads and make sure the count is 0. */ /* FALLTHROUGH */ default: error = EOPNOTSUPP; } return (error); } static moduledata_t kgssapi_mod = { "kgssapi", kgssapi_modevent, NULL, }; DECLARE_MODULE(kgssapi, kgssapi_mod, SI_SUB_VFS, SI_ORDER_ANY); MODULE_DEPEND(kgssapi, krpc, 1, 1, 1); MODULE_VERSION(kgssapi, 1);