gss_impl.c revision 184588
1184588Sdfr/*- 2184588Sdfr * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3184588Sdfr * Authors: Doug Rabson <dfr@rabson.org> 4184588Sdfr * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 5184588Sdfr * 6184588Sdfr * Redistribution and use in source and binary forms, with or without 7184588Sdfr * modification, are permitted provided that the following conditions 8184588Sdfr * are met: 9184588Sdfr * 1. Redistributions of source code must retain the above copyright 10184588Sdfr * notice, this list of conditions and the following disclaimer. 11184588Sdfr * 2. Redistributions in binary form must reproduce the above copyright 12184588Sdfr * notice, this list of conditions and the following disclaimer in the 13184588Sdfr * documentation and/or other materials provided with the distribution. 14184588Sdfr * 15184588Sdfr * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16184588Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17184588Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18184588Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19184588Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20184588Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21184588Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22184588Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23184588Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24184588Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25184588Sdfr * SUCH DAMAGE. 26184588Sdfr */ 27184588Sdfr 28184588Sdfr#include <sys/cdefs.h> 29184588Sdfr__FBSDID("$FreeBSD: head/sys/kgssapi/gss_impl.c 184588 2008-11-03 10:38:00Z dfr $"); 30184588Sdfr 31184588Sdfr#include <sys/param.h> 32184588Sdfr#include <sys/kernel.h> 33184588Sdfr#include <sys/kobj.h> 34184588Sdfr#include <sys/malloc.h> 35184588Sdfr#include <sys/module.h> 36184588Sdfr#include <sys/priv.h> 37184588Sdfr#include <sys/syscall.h> 38184588Sdfr#include <sys/sysent.h> 39184588Sdfr#include <sys/sysproto.h> 40184588Sdfr 41184588Sdfr#include <kgssapi/gssapi.h> 42184588Sdfr#include <kgssapi/gssapi_impl.h> 43184588Sdfr#include <rpc/rpc.h> 44184588Sdfr#include <rpc/rpc_com.h> 45184588Sdfr 46184588Sdfr#include "gssd.h" 47184588Sdfr#include "kgss_if.h" 48184588Sdfr 49184588SdfrMALLOC_DEFINE(M_GSSAPI, "GSS-API", "GSS-API"); 50184588Sdfr 51184588Sdfr/* 52184588Sdfr * Syscall hooks 53184588Sdfr */ 54184588Sdfrstatic int gssd_syscall_offset = SYS_gssd_syscall; 55184588Sdfrstatic struct sysent gssd_syscall_prev_sysent; 56184588SdfrMAKE_SYSENT(gssd_syscall); 57184588Sdfrstatic bool_t gssd_syscall_registered = FALSE; 58184588Sdfr 59184588Sdfrstruct kgss_mech_list kgss_mechs; 60184588SdfrCLIENT *kgss_gssd_handle; 61184588Sdfr 62184588Sdfrstatic void 63184588Sdfrkgss_init(void *dummy) 64184588Sdfr{ 65184588Sdfr int error; 66184588Sdfr 67184588Sdfr LIST_INIT(&kgss_mechs); 68184588Sdfr error = syscall_register(&gssd_syscall_offset, &gssd_syscall_sysent, 69184588Sdfr &gssd_syscall_prev_sysent); 70184588Sdfr if (error) 71184588Sdfr printf("Can't register GSSD syscall\n"); 72184588Sdfr else 73184588Sdfr gssd_syscall_registered = TRUE; 74184588Sdfr} 75184588SdfrSYSINIT(kgss_init, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_init, NULL); 76184588Sdfr 77184588Sdfrstatic void 78184588Sdfrkgss_uninit(void *dummy) 79184588Sdfr{ 80184588Sdfr 81184588Sdfr if (gssd_syscall_registered) 82184588Sdfr syscall_deregister(&gssd_syscall_offset, 83184588Sdfr &gssd_syscall_prev_sysent); 84184588Sdfr} 85184588SdfrSYSUNINIT(kgss_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_uninit, NULL); 86184588Sdfr 87184588Sdfrint 88184588Sdfrgssd_syscall(struct thread *td, struct gssd_syscall_args *uap) 89184588Sdfr{ 90184588Sdfr struct sockaddr_un sun; 91184588Sdfr struct netconfig *nconf; 92184588Sdfr char path[MAXPATHLEN]; 93184588Sdfr int error; 94184588Sdfr 95184588Sdfr error = priv_check(td, PRIV_NFS_DAEMON); 96184588Sdfr if (error) 97184588Sdfr return (error); 98184588Sdfr 99184588Sdfr if (kgss_gssd_handle) 100184588Sdfr CLNT_DESTROY(kgss_gssd_handle); 101184588Sdfr 102184588Sdfr error = copyinstr(uap->path, path, sizeof(path), NULL); 103184588Sdfr if (error) 104184588Sdfr return (error); 105184588Sdfr 106184588Sdfr sun.sun_family = AF_LOCAL; 107184588Sdfr strcpy(sun.sun_path, path); 108184588Sdfr sun.sun_len = SUN_LEN(&sun); 109184588Sdfr 110184588Sdfr nconf = getnetconfigent("local"); 111184588Sdfr kgss_gssd_handle = clnt_reconnect_create(nconf, 112184588Sdfr (struct sockaddr *) &sun, GSSD, GSSDVERS, 113184588Sdfr RPC_MAXDATASIZE, RPC_MAXDATASIZE); 114184588Sdfr 115184588Sdfr return (0); 116184588Sdfr} 117184588Sdfr 118184588Sdfrint 119184588Sdfrkgss_oid_equal(const gss_OID oid1, const gss_OID oid2) 120184588Sdfr{ 121184588Sdfr 122184588Sdfr if (oid1 == oid2) 123184588Sdfr return (1); 124184588Sdfr if (!oid1 || !oid2) 125184588Sdfr return (0); 126184588Sdfr if (oid1->length != oid2->length) 127184588Sdfr return (0); 128184588Sdfr if (memcmp(oid1->elements, oid2->elements, oid1->length)) 129184588Sdfr return (0); 130184588Sdfr return (1); 131184588Sdfr} 132184588Sdfr 133184588Sdfrvoid 134184588Sdfrkgss_install_mech(gss_OID mech_type, const char *name, struct kobj_class *cls) 135184588Sdfr{ 136184588Sdfr struct kgss_mech *km; 137184588Sdfr 138184588Sdfr km = malloc(sizeof(struct kgss_mech), M_GSSAPI, M_WAITOK); 139184588Sdfr km->km_mech_type = mech_type; 140184588Sdfr km->km_mech_name = name; 141184588Sdfr km->km_class = cls; 142184588Sdfr LIST_INSERT_HEAD(&kgss_mechs, km, km_link); 143184588Sdfr} 144184588Sdfr 145184588Sdfrvoid 146184588Sdfrkgss_uninstall_mech(gss_OID mech_type) 147184588Sdfr{ 148184588Sdfr struct kgss_mech *km; 149184588Sdfr 150184588Sdfr LIST_FOREACH(km, &kgss_mechs, km_link) { 151184588Sdfr if (kgss_oid_equal(km->km_mech_type, mech_type)) { 152184588Sdfr LIST_REMOVE(km, km_link); 153184588Sdfr free(km, M_GSSAPI); 154184588Sdfr return; 155184588Sdfr } 156184588Sdfr } 157184588Sdfr} 158184588Sdfr 159184588Sdfrgss_OID 160184588Sdfrkgss_find_mech_by_name(const char *name) 161184588Sdfr{ 162184588Sdfr struct kgss_mech *km; 163184588Sdfr 164184588Sdfr LIST_FOREACH(km, &kgss_mechs, km_link) { 165184588Sdfr if (!strcmp(km->km_mech_name, name)) { 166184588Sdfr return (km->km_mech_type); 167184588Sdfr } 168184588Sdfr } 169184588Sdfr return (GSS_C_NO_OID); 170184588Sdfr} 171184588Sdfr 172184588Sdfrconst char * 173184588Sdfrkgss_find_mech_by_oid(const gss_OID oid) 174184588Sdfr{ 175184588Sdfr struct kgss_mech *km; 176184588Sdfr 177184588Sdfr LIST_FOREACH(km, &kgss_mechs, km_link) { 178184588Sdfr if (kgss_oid_equal(km->km_mech_type, oid)) { 179184588Sdfr return (km->km_mech_name); 180184588Sdfr } 181184588Sdfr } 182184588Sdfr return (NULL); 183184588Sdfr} 184184588Sdfr 185184588Sdfrgss_ctx_id_t 186184588Sdfrkgss_create_context(gss_OID mech_type) 187184588Sdfr{ 188184588Sdfr struct kgss_mech *km; 189184588Sdfr gss_ctx_id_t ctx; 190184588Sdfr 191184588Sdfr LIST_FOREACH(km, &kgss_mechs, km_link) { 192184588Sdfr if (kgss_oid_equal(km->km_mech_type, mech_type)) 193184588Sdfr break; 194184588Sdfr } 195184588Sdfr if (!km) 196184588Sdfr return (NULL); 197184588Sdfr 198184588Sdfr ctx = (gss_ctx_id_t) kobj_create(km->km_class, M_GSSAPI, M_WAITOK); 199184588Sdfr KGSS_INIT(ctx); 200184588Sdfr 201184588Sdfr return (ctx); 202184588Sdfr} 203184588Sdfr 204184588Sdfrvoid 205184588Sdfrkgss_delete_context(gss_ctx_id_t ctx, gss_buffer_t output_token) 206184588Sdfr{ 207184588Sdfr 208184588Sdfr KGSS_DELETE(ctx, output_token); 209184588Sdfr kobj_delete((kobj_t) ctx, M_GSSAPI); 210184588Sdfr} 211184588Sdfr 212184588SdfrOM_uint32 213184588Sdfrkgss_transfer_context(gss_ctx_id_t ctx) 214184588Sdfr{ 215184588Sdfr struct export_sec_context_res res; 216184588Sdfr struct export_sec_context_args args; 217184588Sdfr enum clnt_stat stat; 218184588Sdfr OM_uint32 maj_stat; 219184588Sdfr 220184588Sdfr if (!kgss_gssd_handle) 221184588Sdfr return (GSS_S_FAILURE); 222184588Sdfr 223184588Sdfr args.ctx = ctx->handle; 224184588Sdfr bzero(&res, sizeof(res)); 225184588Sdfr stat = gssd_export_sec_context_1(&args, &res, kgss_gssd_handle); 226184588Sdfr if (stat != RPC_SUCCESS) { 227184588Sdfr return (GSS_S_FAILURE); 228184588Sdfr } 229184588Sdfr 230184588Sdfr maj_stat = KGSS_IMPORT(ctx, res.format, &res.interprocess_token); 231184588Sdfr ctx->handle = 0; 232184588Sdfr 233184588Sdfr xdr_free((xdrproc_t) xdr_export_sec_context_res, &res); 234184588Sdfr 235184588Sdfr return (maj_stat); 236184588Sdfr} 237184588Sdfr 238184588Sdfrvoid 239184588Sdfrkgss_copy_buffer(const gss_buffer_t from, gss_buffer_t to) 240184588Sdfr{ 241184588Sdfr to->length = from->length; 242184588Sdfr if (from->length) { 243184588Sdfr to->value = malloc(from->length, M_GSSAPI, M_WAITOK); 244184588Sdfr bcopy(from->value, to->value, from->length); 245184588Sdfr } else { 246184588Sdfr to->value = NULL; 247184588Sdfr } 248184588Sdfr} 249184588Sdfr 250184588Sdfr/* 251184588Sdfr * Kernel module glue 252184588Sdfr */ 253184588Sdfrstatic int 254184588Sdfrkgssapi_modevent(module_t mod, int type, void *data) 255184588Sdfr{ 256184588Sdfr 257184588Sdfr return (0); 258184588Sdfr} 259184588Sdfrstatic moduledata_t kgssapi_mod = { 260184588Sdfr "kgssapi", 261184588Sdfr kgssapi_modevent, 262184588Sdfr NULL, 263184588Sdfr}; 264184588SdfrDECLARE_MODULE(kgssapi, kgssapi_mod, SI_SUB_VFS, SI_ORDER_ANY); 265184588SdfrMODULE_DEPEND(kgssapi, krpc, 1, 1, 1); 266184588SdfrMODULE_VERSION(kgssapi, 1); 267