lib/libgssapi/gss_oid_to_str.c

   1 /*-
   2  * Copyright (c) 2000 The Regents of the University of Michigan.
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 2000 Dug Song <dugsong@UMICH.EDU>.
   6  * All rights reserved, all wrongs reversed.
   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  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  22  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  23  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  24  * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  28  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  29  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  31  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 /* $FreeBSD$ */
  34
  35 #include <gssapi/gssapi.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <errno.h>
  40
  41 #include "utils.h"
  42
  43 OM_uint32
  44 gss_oid_to_str(OM_uint32 *minor_status, gss_OID oid, gss_buffer_t oid_str)
  45 {
  46         char            numstr[128];
  47         unsigned long   number;
  48         int             numshift;
  49         size_t          string_length;
  50         size_t          i;
  51         unsigned char   *cp;
  52         char            *bp;
  53
  54         *minor_status = 0;
  55         _gss_buffer_zero(oid_str);
  56
  57         if (oid == GSS_C_NULL_OID)
  58                 return (GSS_S_FAILURE);
  59
  60         /* Decoded according to krb5/gssapi_krb5.c */
  61
  62         /* First determine the size of the string */
  63         string_length = 0;
  64         number = 0;
  65         numshift = 0;
  66         cp = (unsigned char *) oid->elements;
  67         number = (unsigned long) cp[0];
  68         sprintf(numstr, "%ld ", number/40);
  69         string_length += strlen(numstr);
  70         sprintf(numstr, "%ld ", number%40);
  71         string_length += strlen(numstr);
  72         for (i=1; i<oid->length; i++) {
  73                 if ( (size_t) (numshift+7) < (sizeof(unsigned long)*8)) {
  74                         number = (number << 7) | (cp[i] & 0x7f);
  75                         numshift += 7;
  76                 }
  77                 else {
  78                         *minor_status = 0;
  79                         return(GSS_S_FAILURE);
  80                 }
  81                 if ((cp[i] & 0x80) == 0) {
  82                         sprintf(numstr, "%ld ", number);
  83                         string_length += strlen(numstr);
  84                         number = 0;
  85                         numshift = 0;
  86                 }
  87         }
  88         /*
  89          * If we get here, we've calculated the length of "n n n ... n ".
  90          * Add 4 here for "{ " and "}\0".
  91          */
  92         string_length += 4;
  93         if ((bp = (char *) malloc(string_length))) {
  94                 strcpy(bp, "{ ");
  95                 number = (unsigned long) cp[0];
  96                 sprintf(numstr, "%ld ", number/40);
  97                 strcat(bp, numstr);
  98                 sprintf(numstr, "%ld ", number%40);
  99                 strcat(bp, numstr);
 100                 number = 0;
 101                 cp = (unsigned char *) oid->elements;
 102                 for (i=1; i<oid->length; i++) {
 103                         number = (number << 7) | (cp[i] & 0x7f);
 104                         if ((cp[i] & 0x80) == 0) {
 105                                 sprintf(numstr, "%ld ", number);
 106                                 strcat(bp, numstr);
 107                                 number = 0;
 108                         }
 109                 }
 110                 strcat(bp, "}");
 111                 oid_str->length = strlen(bp)+1;
 112                 oid_str->value = (void *) bp;
 113                 *minor_status = 0;
 114                 return(GSS_S_COMPLETE);
 115         }
 116         *minor_status = ENOMEM;
 117         return(GSS_S_FAILURE);
 118 }