source/heimdal/lib/gssapi/krb5/display_status.c

   1 /*
   2  * Copyright (c) 1998 - 2006 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   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  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5/gsskrb5_locl.h"
  35
  36 RCSID("$Id: display_status.c,v 1.17 2006/11/13 18:01:38 lha Exp $");
  37
  38 static const char *
  39 calling_error(OM_uint32 v)
  40 {
  41     static const char *msgs[] = {
  42         NULL,                   /* 0 */
  43         "A required input parameter could not be read.", /*  */
  44         "A required output parameter could not be written.", /*  */
  45         "A parameter was malformed"
  46     };
  47
  48     v >>= GSS_C_CALLING_ERROR_OFFSET;
  49
  50     if (v == 0)
  51         return "";
  52     else if (v >= sizeof(msgs)/sizeof(*msgs))
  53         return "unknown calling error";
  54     else
  55         return msgs[v];
  56 }
  57
  58 static const char *
  59 routine_error(OM_uint32 v)
  60 {
  61     static const char *msgs[] = {
  62         NULL,                   /* 0 */
  63         "An unsupported mechanism was requested",
  64         "An invalid name was supplied",
  65         "A supplied name was of an unsupported type",
  66         "Incorrect channel bindings were supplied",
  67         "An invalid status code was supplied",
  68         "A token had an invalid MIC",
  69         "No credentials were supplied, "
  70         "or the credentials were unavailable or inaccessible.",
  71         "No context has been established",
  72         "A token was invalid",
  73         "A credential was invalid",
  74         "The referenced credentials have expired",
  75         "The context has expired",
  76         "Miscellaneous failure (see text)",
  77         "The quality-of-protection requested could not be provide",
  78         "The operation is forbidden by local security policy",
  79         "The operation or option is not available",
  80         "The requested credential element already exists",
  81         "The provided name was not a mechanism name.",
  82     };
  83
  84     v >>= GSS_C_ROUTINE_ERROR_OFFSET;
  85
  86     if (v == 0)
  87         return "";
  88     else if (v >= sizeof(msgs)/sizeof(*msgs))
  89         return "unknown routine error";
  90     else
  91         return msgs[v];
  92 }
  93
  94 static const char *
  95 supplementary_error(OM_uint32 v)
  96 {
  97     static const char *msgs[] = {
  98         "normal completion",
  99         "continuation call to routine required",
 100         "duplicate per-message token detected",
 101         "timed-out per-message token detected",
 102         "reordered (early) per-message token detected",
 103         "skipped predecessor token(s) detected"
 104     };
 105
 106     v >>= GSS_C_SUPPLEMENTARY_OFFSET;
 107
 108     if (v >= sizeof(msgs)/sizeof(*msgs))
 109         return "unknown routine error";
 110     else
 111         return msgs[v];
 112 }
 113
 114 void
 115 _gsskrb5_clear_status (void)
 116 {
 117     krb5_context context;
 118
 119     if (_gsskrb5_init (&context) != 0)
 120         return;
 121     krb5_clear_error_string(context);
 122 }
 123
 124 void
 125 _gsskrb5_set_status (const char *fmt, ...)
 126 {
 127     krb5_context context;
 128     va_list args;
 129     char *str;
 130
 131     if (_gsskrb5_init (&context) != 0)
 132         return;
 133
 134     va_start(args, fmt);
 135     vasprintf(&str, fmt, args);
 136     va_end(args);
 137     if (str) {
 138         krb5_set_error_string(context, str);
 139         free(str);
 140     }
 141 }
 142
 143 OM_uint32 _gsskrb5_display_status
 144 (OM_uint32              *minor_status,
 145  OM_uint32               status_value,
 146  int                     status_type,
 147  const gss_OID   mech_type,
 148  OM_uint32              *message_context,
 149  gss_buffer_t    status_string)
 150 {
 151     krb5_context context;
 152     char *buf;
 153
 154     GSSAPI_KRB5_INIT (&context);
 155
 156     status_string->length = 0;
 157     status_string->value = NULL;
 158
 159     if (gss_oid_equal(mech_type, GSS_C_NO_OID) == 0 &&
 160         gss_oid_equal(mech_type, GSS_KRB5_MECHANISM) == 0) {
 161         *minor_status = 0;
 162         return GSS_C_GSS_CODE;
 163     }
 164
 165     if (status_type == GSS_C_GSS_CODE) {
 166         if (GSS_SUPPLEMENTARY_INFO(status_value))
 167             asprintf(&buf, "%s",
 168                      supplementary_error(GSS_SUPPLEMENTARY_INFO(status_value)));
 169         else
 170             asprintf (&buf, "%s %s",
 171                       calling_error(GSS_CALLING_ERROR(status_value)),
 172                       routine_error(GSS_ROUTINE_ERROR(status_value)));
 173     } else if (status_type == GSS_C_MECH_CODE) {
 174         buf = krb5_get_error_string(context);
 175         if (buf == NULL) {
 176             const char *tmp = krb5_get_err_text (context, status_value);
 177             if (tmp == NULL)
 178                 asprintf(&buf, "unknown mech error-code %u",
 179                          (unsigned)status_value);
 180             else
 181                 buf = strdup(tmp);
 182         }
 183     } else {
 184         *minor_status = EINVAL;
 185         return GSS_S_BAD_STATUS;
 186     }
 187
 188     if (buf == NULL) {
 189         *minor_status = ENOMEM;
 190         return GSS_S_FAILURE;
 191     }
 192
 193     *message_context = 0;
 194     *minor_status = 0;
 195
 196     status_string->length = strlen(buf);
 197     status_string->value  = buf;
 198
 199     return GSS_S_COMPLETE;
 200 }