1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <gssapi/gssapi.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <errno.h> 33 34 #include "mech_switch.h" 35 #include "name.h" 36 #include "cred.h" 37 #include "context.h" 38 #include "utils.h" 39 40 static gss_cred_id_t 41 _gss_mech_cred_find(gss_cred_id_t cred_handle, gss_OID mech_type) 42 { 43 struct _gss_cred *cred = (struct _gss_cred *)cred_handle; 44 struct _gss_mechanism_cred *mc; 45 46 if (cred == NULL) 47 return GSS_C_NO_CREDENTIAL; 48 49 SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) { 50 if (gss_oid_equal(mech_type, mc->gmc_mech_oid)) 51 return mc->gmc_cred; 52 } 53 return GSS_C_NO_CREDENTIAL; 54 } 55 56 OM_uint32 57 gss_init_sec_context(OM_uint32 * minor_status, 58 const gss_cred_id_t initiator_cred_handle, 59 gss_ctx_id_t * context_handle, 60 const gss_name_t target_name, 61 const gss_OID input_mech_type, 62 OM_uint32 req_flags, 63 OM_uint32 time_req, 64 const gss_channel_bindings_t input_chan_bindings, 65 const gss_buffer_t input_token, 66 gss_OID * actual_mech_type, 67 gss_buffer_t output_token, 68 OM_uint32 * ret_flags, 69 OM_uint32 * time_rec) 70 { 71 OM_uint32 major_status; 72 struct _gss_mech_switch *m; 73 struct _gss_name *name = (struct _gss_name *) target_name; 74 struct _gss_mechanism_name *mn; 75 struct _gss_context *ctx = (struct _gss_context *) *context_handle; 76 gss_cred_id_t cred_handle; 77 int allocated_ctx; 78 gss_OID mech_type = input_mech_type; 79 80 *minor_status = 0; 81 82 _gss_buffer_zero(output_token); 83 if (actual_mech_type) 84 *actual_mech_type = GSS_C_NO_OID; 85 if (ret_flags) 86 *ret_flags = 0; 87 if (time_rec) 88 *time_rec = 0; 89 90 /* 91 * If we haven't allocated a context yet, do so now and lookup 92 * the mechanism switch table. If we have one already, make 93 * sure we use the same mechanism switch as before. 94 */ 95 if (!ctx) { 96 if (mech_type == GSS_C_NO_OID) { 97 _gss_load_mech(); 98 if (_gss_mech_oids == GSS_C_NO_OID_SET 99 || _gss_mech_oids->count == 0) 100 return (GSS_S_BAD_MECH); 101 mech_type = &_gss_mech_oids->elements[0]; 102 } 103 104 ctx = malloc(sizeof(struct _gss_context)); 105 if (!ctx) { 106 *minor_status = ENOMEM; 107 return (GSS_S_FAILURE); 108 } 109 memset(ctx, 0, sizeof(struct _gss_context)); 110 m = ctx->gc_mech = _gss_find_mech_switch(mech_type); 111 if (!m) { 112 free(ctx); 113 return (GSS_S_BAD_MECH); 114 } 115 allocated_ctx = 1; 116 } else { 117 m = ctx->gc_mech; 118 mech_type = &ctx->gc_mech->gm_mech_oid; 119 allocated_ctx = 0; 120 } 121 122 /* 123 * Find the MN for this mechanism. 124 */ 125 major_status = _gss_find_mn(minor_status, name, mech_type, &mn); 126 if (major_status != GSS_S_COMPLETE) { 127 if (allocated_ctx) 128 free(ctx); 129 return (major_status); 130 } 131 132 /* 133 * If we have a cred, find the cred for this mechanism. 134 */ 135 cred_handle = _gss_mech_cred_find(initiator_cred_handle, mech_type); 136 137 major_status = m->gm_init_sec_context(minor_status, 138 cred_handle, 139 &ctx->gc_ctx, 140 mn->gmn_name, 141 mech_type, 142 req_flags, 143 time_req, 144 input_chan_bindings, 145 input_token, 146 actual_mech_type, 147 output_token, 148 ret_flags, 149 time_rec); 150 151 if (major_status != GSS_S_COMPLETE 152 && major_status != GSS_S_CONTINUE_NEEDED) { 153 if (allocated_ctx) 154 free(ctx); 155 _gss_buffer_zero(output_token); 156 _gss_mg_error(m, major_status, *minor_status); 157 } else { 158 *context_handle = (gss_ctx_id_t) ctx; 159 } 160 161 return (major_status); 162 } 163