util_cred.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 OM_uint32
  36 gssEapAllocCred(OM_uint32 *minor, gss_cred_id_t *pCred)
  37 {
  38     OM_uint32 tmpMinor;
  39     gss_cred_id_t cred;
  40
  41     *pCred = GSS_C_NO_CREDENTIAL;
  42
  43     cred = (gss_cred_id_t)GSSEAP_CALLOC(1, sizeof(*cred));
  44     if (cred == NULL) {
  45         *minor = ENOMEM;
  46         return GSS_S_FAILURE;
  47     }
  48
  49     if (GSSEAP_MUTEX_INIT(&cred->mutex) != 0) {
  50         *minor = errno;
  51         gssEapReleaseCred(&tmpMinor, &cred);
  52         return GSS_S_FAILURE;
  53     }
  54
  55     *pCred = cred;
  56
  57     *minor = 0;
  58     return GSS_S_COMPLETE;
  59 }
  60
  61 OM_uint32
  62 gssEapReleaseCred(OM_uint32 *minor, gss_cred_id_t *pCred)
  63 {
  64     OM_uint32 tmpMinor;
  65     gss_cred_id_t cred = *pCred;
  66
  67     if (cred == GSS_C_NO_CREDENTIAL) {
  68         return GSS_S_COMPLETE;
  69     }
  70
  71     gssEapReleaseName(&tmpMinor, &cred->name);
  72
  73     if (cred->password.value != NULL) {
  74         memset(cred->password.value, 0, cred->password.length);
  75         GSSEAP_FREE(cred->password.value);
  76     }
  77
  78     if (cred->radiusConfigFile != NULL)
  79         free(cred->radiusConfigFile);
  80
  81     GSSEAP_MUTEX_DESTROY(&cred->mutex);
  82     memset(cred, 0, sizeof(*cred));
  83     GSSEAP_FREE(cred);
  84     *pCred = NULL;
  85
  86     *minor = 0;
  87     return GSS_S_COMPLETE;
  88 }
  89
  90 OM_uint32
  91 gssEapAcquireCred(OM_uint32 *minor,
  92                   const gss_name_t desiredName,
  93                   const gss_buffer_t password,
  94                   OM_uint32 timeReq,
  95                   const gss_OID_set desiredMechs,
  96                   int credUsage,
  97                   gss_cred_id_t *pCred,
  98                   gss_OID_set *pActualMechs,
  99                   OM_uint32 *timeRec)
 100 {
 101     OM_uint32 major, tmpMinor;
 102     gss_cred_id_t cred;
 103
 104     /* XXX TODO validate with changed set_cred_option API */
 105     *pCred = GSS_C_NO_CREDENTIAL;
 106
 107     major = gssEapAllocCred(minor, &cred);
 108     if (GSS_ERROR(major))
 109         goto cleanup;
 110
 111     switch (credUsage) {
 112     case GSS_C_BOTH:
 113         cred->flags |= CRED_FLAG_INITIATE | CRED_FLAG_ACCEPT;
 114         break;
 115     case GSS_C_INITIATE:
 116         cred->flags |= CRED_FLAG_INITIATE;
 117         break;
 118     case GSS_C_ACCEPT:
 119         cred->flags |= CRED_FLAG_ACCEPT;
 120         break;
 121     default:
 122         major = GSS_S_FAILURE;
 123         goto cleanup;
 124         break;
 125     }
 126
 127     if (desiredName != GSS_C_NO_NAME) {
 128         major = gssEapDuplicateName(minor, desiredName, &cred->name);
 129         if (GSS_ERROR(major))
 130             goto cleanup;
 131     } else {
 132         if (cred->flags & CRED_FLAG_INITIATE) {
 133             gss_buffer_desc buf;
 134
 135             buf.value = getlogin(); /* XXX */
 136             buf.length = strlen((char *)buf.value);
 137
 138             major = gssEapImportName(minor, &buf,
 139                                      GSS_C_NT_USER_NAME, &cred->name);
 140             if (GSS_ERROR(major))
 141                 goto cleanup;
 142         }
 143
 144         cred->flags |= CRED_FLAG_DEFAULT_IDENTITY;
 145     }
 146
 147     if (password != GSS_C_NO_BUFFER) {
 148         major = duplicateBuffer(minor, password, &cred->password);
 149         if (GSS_ERROR(major))
 150             goto cleanup;
 151
 152         cred->flags |= CRED_FLAG_PASSWORD;
 153     }
 154
 155     major = gssEapValidateMechs(minor, desiredMechs);
 156     if (GSS_ERROR(major))
 157         goto cleanup;
 158
 159     major = duplicateOidSet(minor, desiredMechs, &cred->mechanisms);
 160     if (GSS_ERROR(major))
 161         goto cleanup;
 162
 163     if (pActualMechs != NULL) {
 164         major = duplicateOidSet(minor, cred->mechanisms, pActualMechs);
 165         if (GSS_ERROR(major))
 166             goto cleanup;
 167     }
 168
 169     if (timeRec != NULL)
 170         *timeRec = GSS_C_INDEFINITE;
 171
 172     *pCred = cred;
 173     major = GSS_S_COMPLETE;
 174
 175 cleanup:
 176     if (GSS_ERROR(major))
 177         gssEapReleaseCred(&tmpMinor, &cred);
 178
 179     return major;
 180 }
 181
 182 int
 183 gssEapCredAvailable(gss_cred_id_t cred, gss_OID mech)
 184 {
 185     OM_uint32 minor;
 186     int present = 0;
 187
 188     assert(mech != GSS_C_NO_OID);
 189
 190     if (cred == GSS_C_NO_CREDENTIAL || cred->mechanisms == GSS_C_NO_OID_SET)
 191         return TRUE;
 192
 193     gss_test_oid_set_member(&minor, mech, cred->mechanisms, &present);
 194
 195     return present;
 196 }