diff options
Diffstat (limited to 'sys/kgssapi/gss_impl.c')
| -rw-r--r-- | sys/kgssapi/gss_impl.c | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/sys/kgssapi/gss_impl.c b/sys/kgssapi/gss_impl.c new file mode 100644 index 0000000..01d940a --- /dev/null +++ b/sys/kgssapi/gss_impl.c @@ -0,0 +1,266 @@ +/*- + * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ + * Authors: Doug Rabson <dfr@rabson.org> + * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> + * + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/kobj.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/priv.h> +#include <sys/syscall.h> +#include <sys/sysent.h> +#include <sys/sysproto.h> + +#include <kgssapi/gssapi.h> +#include <kgssapi/gssapi_impl.h> +#include <rpc/rpc.h> +#include <rpc/rpc_com.h> + +#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; + +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); + 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 +gssd_syscall(struct thread *td, struct gssd_syscall_args *uap) +{ + struct sockaddr_un sun; + struct netconfig *nconf; + char path[MAXPATHLEN]; + int error; + + error = priv_check(td, PRIV_NFS_DAEMON); + if (error) + return (error); + + if (kgss_gssd_handle) + CLNT_DESTROY(kgss_gssd_handle); + + error = copyinstr(uap->path, path, sizeof(path), NULL); + if (error) + return (error); + + sun.sun_family = AF_LOCAL; + strcpy(sun.sun_path, path); + sun.sun_len = SUN_LEN(&sun); + + nconf = getnetconfigent("local"); + kgss_gssd_handle = clnt_reconnect_create(nconf, + (struct sockaddr *) &sun, GSSD, GSSDVERS, + RPC_MAXDATASIZE, RPC_MAXDATASIZE); + + 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; + } +} + +/* + * Kernel module glue + */ +static int +kgssapi_modevent(module_t mod, int type, void *data) +{ + + return (0); +} +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); |
