crypto/external/bsd/heimdal/dist/lib/gssapi/krb5/display_status.c

   1 /*      $NetBSD: display_status.c,v 1.1.1.1 2011/04/13 18:14:45 elric Exp $     */
   2
   3 /*
   4  * Copyright (c) 1998 - 2006 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "gsskrb5_locl.h"
  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_message(context);
 122 }
 123
 124 void
 125 _gsskrb5_set_status (int ret, const char *fmt, ...)
 126 {
 127     krb5_context context;
 128     va_list args;
 129     char *str;
 130     int e;
 131
 132     if (_gsskrb5_init (&context) != 0)
 133         return;
 134
 135     va_start(args, fmt);
 136     e = vasprintf(&str, fmt, args);
 137     va_end(args);
 138     if (e >= 0 && str) {
 139         krb5_set_error_message(context, ret, "%s", str);
 140         free(str);
 141     }
 142 }
 143
 144 OM_uint32 GSSAPI_CALLCONV _gsskrb5_display_status
 145 (OM_uint32              *minor_status,
 146  OM_uint32               status_value,
 147  int                     status_type,
 148  const gss_OID   mech_type,
 149  OM_uint32              *message_context,
 150  gss_buffer_t    status_string)
 151 {
 152     krb5_context context;
 153     char *buf = NULL;
 154     int e = 0;
 155
 156     GSSAPI_KRB5_INIT (&context);
 157
 158     status_string->length = 0;
 159     status_string->value = NULL;
 160
 161     if (gss_oid_equal(mech_type, GSS_C_NO_OID) == 0 &&
 162         gss_oid_equal(mech_type, GSS_KRB5_MECHANISM) == 0) {
 163         *minor_status = 0;
 164         return GSS_C_GSS_CODE;
 165     }
 166
 167     if (status_type == GSS_C_GSS_CODE) {
 168         if (GSS_SUPPLEMENTARY_INFO(status_value))
 169             e = asprintf(&buf, "%s",
 170                          supplementary_error(GSS_SUPPLEMENTARY_INFO(status_value)));
 171         else
 172             e = asprintf (&buf, "%s %s",
 173                           calling_error(GSS_CALLING_ERROR(status_value)),
 174                           routine_error(GSS_ROUTINE_ERROR(status_value)));
 175     } else if (status_type == GSS_C_MECH_CODE) {
 176         const char *buf2 = krb5_get_error_message(context, status_value);
 177         if (buf2) {
 178             buf = strdup(buf2);
 179             krb5_free_error_message(context, buf2);
 180         } else {
 181             e = asprintf(&buf, "unknown mech error-code %u",
 182                          (unsigned)status_value);
 183         }
 184     } else {
 185         *minor_status = EINVAL;
 186         return GSS_S_BAD_STATUS;
 187     }
 188
 189     if (e < 0 || buf == NULL) {
 190         *minor_status = ENOMEM;
 191         return GSS_S_FAILURE;
 192     }
 193
 194     *message_context = 0;
 195     *minor_status = 0;
 196
 197     status_string->length = strlen(buf);
 198     status_string->value  = buf;
 199
 200     return GSS_S_COMPLETE;
 201 }