lib/gssapi/krb5/export_name.c

   1 /*
   2  * Copyright (c) 1997, 1999, 2003 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 "gsskrb5_locl.h"
  35
  36 OM_uint32 _gsskrb5_export_name
  37            (OM_uint32  * minor_status,
  38             const gss_name_t input_name,
  39             gss_buffer_t exported_name
  40            )
  41 {
  42     krb5_context context;
  43     krb5_const_principal princ = (krb5_const_principal)input_name;
  44     krb5_error_code kret;
  45     char *buf, *name;
  46     size_t len;
  47
  48     GSSAPI_KRB5_INIT (&context);
  49
  50     kret = krb5_unparse_name (context, princ, &name);
  51     if (kret) {
  52         *minor_status = kret;
  53         return GSS_S_FAILURE;
  54     }
  55     len = strlen (name);
  56
  57     exported_name->length = 10 + len + GSS_KRB5_MECHANISM->length;
  58     exported_name->value  = malloc(exported_name->length);
  59     if (exported_name->value == NULL) {
  60         free (name);
  61         *minor_status = ENOMEM;
  62         return GSS_S_FAILURE;
  63     }
  64
  65     /* TOK, MECH_OID_LEN, DER(MECH_OID), NAME_LEN, NAME */
  66
  67     buf = exported_name->value;
  68     memcpy(buf, "\x04\x01", 2);
  69     buf += 2;
  70     buf[0] = ((GSS_KRB5_MECHANISM->length + 2) >> 8) & 0xff;
  71     buf[1] = (GSS_KRB5_MECHANISM->length + 2) & 0xff;
  72     buf+= 2;
  73     buf[0] = 0x06;
  74     buf[1] = (GSS_KRB5_MECHANISM->length) & 0xFF;
  75     buf+= 2;
  76
  77     memcpy(buf, GSS_KRB5_MECHANISM->elements, GSS_KRB5_MECHANISM->length);
  78     buf += GSS_KRB5_MECHANISM->length;
  79
  80     buf[0] = (len >> 24) & 0xff;
  81     buf[1] = (len >> 16) & 0xff;
  82     buf[2] = (len >> 8) & 0xff;
  83     buf[3] = (len) & 0xff;
  84     buf += 4;
  85
  86     memcpy (buf, name, len);
  87
  88     free (name);
  89
  90     *minor_status = 0;
  91     return GSS_S_COMPLETE;
  92 }