authldapescape.c

   1 /*
   2 ** Copyright 2009 Double Precision, Inc.  See COPYING for
   3 ** distribution information.
   4 */
   5
   6 #if     HAVE_CONFIG_H
   7 #include        "courier_auth_config.h"
   8 #endif
   9 #include        <stdio.h>
  10 #include        <stdlib.h>
  11 #include        <string.h>
  12 #include        <errno.h>
  13 #if     HAVE_UNISTD_H
  14 #include        <unistd.h>
  15 #endif
  16
  17 #include        "courierauth.h"
  18
  19 static const char rcsid[]="$Id: authldapescape.c,v 1.2 2009/12/18 04:33:45 mrsam Exp $";
  20
  21 static void escape_specials(const char *str,
  22                             char *bufptr,
  23                             size_t *sizeptr)
  24 {
  25         static const char specials[]="*()\\";
  26
  27         while (*str)
  28         {
  29                 char buf[10];
  30                 char *p;
  31
  32                 if (strchr(specials, *str))
  33                 {
  34                         sprintf(buf, "\\%02x", (int)(unsigned char)*str);
  35                 }
  36                 else
  37                 {
  38                         buf[0]=*str;
  39                         buf[1]=0;
  40                 }
  41
  42                 for (p=buf; *p; p++)
  43                 {
  44                         if (bufptr)
  45                                 *bufptr++=*p;
  46                         if (sizeptr)
  47                                 ++*sizeptr;
  48                 }
  49                 ++str;
  50         }
  51
  52         if (bufptr)
  53                 *bufptr=0;
  54 }
  55
  56 char *courier_auth_ldap_escape(const char *str)
  57 {
  58         char *escaped;
  59         size_t escaped_cnt=1;
  60         int rc;
  61
  62         escape_specials(str, NULL, &escaped_cnt);
  63         escaped=malloc(escaped_cnt);
  64         if (!escaped)
  65                 return NULL;
  66
  67         escape_specials(str, escaped, NULL);
  68
  69         return escaped;
  70 }