www.project-moonshot.org Git - mech_eap.orig/blob - accept_sec_context.c

   1 /*
   2  * Copyright (c) 2010, JANET(UK)
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  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  * 3. Neither the name of JANET(UK) nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include "gssapiP_eap.h"
  34
  35 static OM_uint32
  36 eapGssSmAcceptAuthenticate(OM_uint32 *minor,
  37                            gss_ctx_id_t ctx,
  38                            gss_cred_id_t cred,
  39                            gss_buffer_t inputToken,
  40                            gss_channel_bindings_t chanBindings,
  41                            gss_buffer_t outputToken)
  42 {
  43     OM_uint32 major, tmpMinor;
  44
  45 cleanup:
  46     return major;
  47 }
  48
  49
  50 static struct eap_gss_acceptor_sm {
  51     enum gss_eap_token_type inputTokenType;
  52     enum gss_eap_token_type outputTokenType;
  53     OM_uint32 (*processToken)(OM_uint32 *,
  54                               gss_ctx_id_t,
  55                               gss_cred_id_t,
  56                               gss_buffer_t,
  57                               gss_channel_bindings_t,
  58                               gss_buffer_t);
  59 } eapGssAcceptorSm[] = {
  60     { TOK_TYPE_EAP_RESP, TOK_TYPE_EAP_REQ, NULL },
  61 };
  62
  63 OM_uint32
  64 gss_accept_sec_context(OM_uint32 *minor,
  65                        gss_ctx_id_t *context_handle,
  66                        gss_cred_id_t cred,
  67                        gss_buffer_t input_token,
  68                        gss_channel_bindings_t input_chan_bindings,
  69                        gss_name_t *src_name,
  70                        gss_OID *mech_type,
  71                        gss_buffer_t output_token,
  72                        OM_uint32 *ret_flags,
  73                        OM_uint32 *time_rec,
  74                        gss_cred_id_t *delegated_cred_handle)
  75 {
  76     OM_uint32 major, tmpMinor;
  77     gss_ctx_id_t ctx = *context_handle;
  78     struct eap_gss_acceptor_sm *sm = NULL;
  79     gss_buffer_desc innerInputToken, innerOutputToken;
  80
  81     *minor = 0;
  82
  83     innerOutputToken.length = 0;
  84     innerOutputToken.value = NULL;
  85
  86     output_token->length = 0;
  87     output_token->value = NULL;
  88
  89     if (cred != GSS_C_NO_CREDENTIAL && !(cred->flags & CRED_FLAG_ACCEPT)) {
  90         return GSS_S_NO_CRED;
  91     }
  92
  93     if (input_token == GSS_C_NO_BUFFER || input_token->length == 0) {
  94         return GSS_S_DEFECTIVE_TOKEN;
  95     }
  96
  97     if (ctx == GSS_C_NO_CONTEXT) {
  98         major = gssEapAllocContext(minor, &ctx);
  99         if (GSS_ERROR(major))
 100             return major;
 101
 102         *context_handle = ctx;
 103     }
 104
 105     GSSEAP_MUTEX_LOCK(&ctx->mutex);
 106
 107     sm = &eapGssAcceptorSm[ctx->state];
 108
 109     major = gssEapVerifyToken(minor, ctx, input_token,
 110                               sm->inputTokenType, &innerInputToken);
 111     if (GSS_ERROR(major))
 112         goto cleanup;
 113
 114     major = (sm->processToken)(minor,
 115                                ctx,
 116                                cred,
 117                                &innerInputToken,
 118                                input_chan_bindings,
 119                                &innerOutputToken);
 120     if (GSS_ERROR(major))
 121         goto cleanup;
 122
 123     if (src_name != NULL && ctx->initiatorName != GSS_C_NO_NAME) {
 124         major = gss_duplicate_name(&minor, ctx->initiatorName, src_name);
 125         if (GSS_ERROR(major))
 126             goto cleanup;
 127     }
 128     if (mech_type != NULL) {
 129         if (!gssEapInternalizeOid(ctx->mechanismUsed, mech_type))
 130             duplicateOid(&tmpMinor, ctx->mechanismUsed, mech_type);
 131     }
 132     if (innerOutputToken.length != 0) {
 133         major = gssEapMakeToken(minor, ctx, &innerOutputToken,
 134                                 sm->outputTokenType, output_token);
 135         if (GSS_ERROR(major))
 136             goto cleanup;
 137     }
 138     if (ret_flags != NULL)
 139         *ret_flags = ctx->gssFlags;
 140     if (time_rec != NULL)
 141         gss_context_time(&tmpMinor, ctx, time_rec);
 142     if (delegated_cred_handle != NULL)
 143         *delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 144
 145     assert(ctx->state == EAP_STATE_ESTABLISHED || major == GSS_S_CONTINUE_NEEDED);
 146
 147 cleanup:
 148     GSSEAP_MUTEX_UNLOCK(&ctx->mutex);
 149
 150     if (GSS_ERROR(major))
 151         gssEapReleaseContext(&tmpMinor, context_handle);
 152
 153     gss_release_buffer(&tmpMinor, &innerOutputToken);
 154
 155     return major;
 156 }