lib/gssapi/krb5/display_status.c

   1 /*
   2  * Copyright (c) 1998 - 2001 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 "gssapi_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 static char *krb5_error_string;
  39
  40 static char *
  41 calling_error(OM_uint32 v)
  42 {
  43     static char *msgs[] = {
  44         NULL,                   /* 0 */
  45         "A required input parameter could not be read.", /*  */
  46         "A required output parameter could not be written.", /*  */
  47         "A parameter was malformed"
  48     };
  49
  50     v >>= GSS_C_CALLING_ERROR_OFFSET;
  51
  52     if (v == 0)
  53         return "";
  54     else if (v >= sizeof(msgs)/sizeof(*msgs))
  55         return "unknown calling error";
  56     else
  57         return msgs[v];
  58 }
  59
  60 static char *
  61 routine_error(OM_uint32 v)
  62 {
  63     static char *msgs[] = {
  64         NULL,                   /* 0 */
  65         "An unsupported mechanism was requested",
  66         "An invalid name was supplied",
  67         "A supplied name was of an unsupported type",
  68         "Incorrect channel bindings were supplied",
  69         "An invalid status code was supplied",
  70         "A token had an invalid MIC",
  71         "No credentials were supplied, "
  72         "or the credentials were unavailable or inaccessible.",
  73         "No context has been established",
  74         "A token was invalid",
  75         "A credential was invalid",
  76         "The referenced credentials have expired",
  77         "The context has expired",
  78         "Miscellaneous failure (see text)",
  79         "The quality-of-protection requested could not be provide",
  80         "The operation is forbidden by local security policy",
  81         "The operation or option is not available",
  82         "The requested credential element already exists",
  83         "The provided name was not a mechanism name.",
  84     };
  85
  86     v >>= GSS_C_ROUTINE_ERROR_OFFSET;
  87
  88     if (v == 0)
  89         return "";
  90     else if (v >= sizeof(msgs)/sizeof(*msgs))
  91         return "unknown routine error";
  92     else
  93         return msgs[v];
  94 }
  95
  96 void
  97 gssapi_krb5_set_error_string (void)
  98 {
  99     krb5_error_string = krb5_get_error_string(gssapi_krb5_context);
 100 }
 101
 102 char *
 103 gssapi_krb5_get_error_string (void)
 104 {
 105     char *ret = krb5_error_string;
 106     krb5_error_string = NULL;
 107     return ret;
 108 }
 109
 110 OM_uint32 gss_display_status
 111            (OM_uint32           *minor_status,
 112             OM_uint32            status_value,
 113             int                  status_type,
 114             const gss_OID        mech_type,
 115             OM_uint32           *message_context,
 116             gss_buffer_t         status_string)
 117 {
 118   char *buf;
 119
 120   gssapi_krb5_init ();
 121
 122   *minor_status = 0;
 123
 124   if (mech_type != GSS_C_NO_OID &&
 125       mech_type != GSS_KRB5_MECHANISM)
 126       return GSS_S_BAD_MECH;
 127
 128   if (status_type == GSS_C_GSS_CODE) {
 129       asprintf (&buf, "%s %s",
 130                 calling_error(GSS_CALLING_ERROR(status_value)),
 131                 routine_error(GSS_ROUTINE_ERROR(status_value)));
 132       if (buf == NULL) {
 133           *minor_status = ENOMEM;
 134           return GSS_S_FAILURE;
 135       }
 136   } else if (status_type == GSS_C_MECH_CODE) {
 137       buf = gssapi_krb5_get_error_string ();
 138       if (buf == NULL)
 139           buf = strdup(krb5_get_err_text (gssapi_krb5_context, status_value));
 140       if (buf == NULL) {
 141           *minor_status = ENOMEM;
 142           return GSS_S_FAILURE;
 143       }
 144   } else
 145       return GSS_S_BAD_STATUS;
 146
 147   *message_context = 0;
 148
 149   status_string->length = strlen(buf);
 150   status_string->value  = buf;
 151
 152   return GSS_S_COMPLETE;
 153 }