1 /*- 2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3 * Authors: Doug Rabson <dfr@rabson.org> 4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/kernel.h> 33 #include <sys/kobj.h> 34 #include <sys/lock.h> 35 #include <sys/malloc.h> 36 #include <sys/mutex.h> 37 38 #include <kgssapi/gssapi.h> 39 #include <kgssapi/gssapi_impl.h> 40 #include <rpc/rpc.h> 41 42 #include "gssd.h" 43 #include "kgss_if.h" 44 45 OM_uint32 gss_accept_sec_context(OM_uint32 *minor_status, 46 gss_ctx_id_t *context_handle, 47 const gss_cred_id_t acceptor_cred_handle, 48 const gss_buffer_t input_token, 49 const gss_channel_bindings_t input_chan_bindings, 50 gss_name_t *src_name, 51 gss_OID *mech_type, 52 gss_buffer_t output_token, 53 OM_uint32 *ret_flags, 54 OM_uint32 *time_rec, 55 gss_cred_id_t *delegated_cred_handle) 56 { 57 struct accept_sec_context_res res; 58 struct accept_sec_context_args args; 59 enum clnt_stat stat; 60 gss_ctx_id_t ctx = *context_handle; 61 gss_name_t name; 62 gss_cred_id_t cred; 63 CLIENT *cl; 64 65 cl = kgss_gssd_client(); 66 if (cl == NULL) { 67 *minor_status = 0; 68 return (GSS_S_FAILURE); 69 } 70 71 if (ctx) 72 args.ctx = ctx->handle; 73 else 74 args.ctx = 0; 75 if (acceptor_cred_handle) 76 args.cred = acceptor_cred_handle->handle; 77 else 78 args.cred = 0; 79 args.input_token = *input_token; 80 args.input_chan_bindings = input_chan_bindings; 81 82 bzero(&res, sizeof(res)); 83 stat = gssd_accept_sec_context_1(&args, &res, cl); 84 CLNT_RELEASE(cl); 85 if (stat != RPC_SUCCESS) { 86 *minor_status = stat; 87 return (GSS_S_FAILURE); 88 } 89 90 if (res.major_status != GSS_S_COMPLETE 91 && res.major_status != GSS_S_CONTINUE_NEEDED) { 92 *minor_status = res.minor_status; 93 xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res); 94 return (res.major_status); 95 } 96 97 *minor_status = res.minor_status; 98 99 if (!ctx) { 100 ctx = kgss_create_context(res.mech_type); 101 if (!ctx) { 102 xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res); 103 *minor_status = 0; 104 return (GSS_S_BAD_MECH); 105 } 106 } 107 *context_handle = ctx; 108 109 ctx->handle = res.ctx; 110 name = malloc(sizeof(struct _gss_name_t), M_GSSAPI, M_WAITOK); 111 name->handle = res.src_name; 112 if (src_name) { 113 *src_name = name; 114 } else { 115 OM_uint32 junk; 116 gss_release_name(&junk, &name); 117 } 118 if (mech_type) 119 *mech_type = KGSS_MECH_TYPE(ctx); 120 kgss_copy_buffer(&res.output_token, output_token); 121 if (ret_flags) 122 *ret_flags = res.ret_flags; 123 if (time_rec) 124 *time_rec = res.time_rec; 125 cred = malloc(sizeof(struct _gss_cred_id_t), M_GSSAPI, M_WAITOK); 126 cred->handle = res.delegated_cred_handle; 127 if (delegated_cred_handle) { 128 *delegated_cred_handle = cred; 129 } else { 130 OM_uint32 junk; 131 gss_release_cred(&junk, &cred); 132 } 133 134 xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res); 135 136 /* 137 * If the context establishment is complete, export it from 138 * userland and hand the result (which includes key material 139 * etc.) to the kernel implementation. 140 */ 141 if (res.major_status == GSS_S_COMPLETE) 142 res.major_status = kgss_transfer_context(ctx); 143 144 return (res.major_status); 145 } 146