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
  20 static void escape_specials(const char *str,
  21                             char *bufptr,
  22                             size_t *sizeptr)
  23 {
  24         static const char specials[]="*()\\";
  25
  26         while (*str)
  27         {
  28                 char buf[10];
  29                 char *p;
  30
  31                 if (strchr(specials, *str))
  32                 {
  33                         sprintf(buf, "\\%02x", (int)(unsigned char)*str);
  34                 }
  35                 else
  36                 {
  37                         buf[0]=*str;
  38                         buf[1]=0;
  39                 }
  40
  41                 for (p=buf; *p; p++)
  42                 {
  43                         if (bufptr)
  44                                 *bufptr++=*p;
  45                         if (sizeptr)
  46                                 ++*sizeptr;
  47                 }
  48                 ++str;
  49         }
  50
  51         if (bufptr)
  52                 *bufptr=0;
  53 }
  54
  55 char *courier_auth_ldap_escape(const char *str)
  56 {
  57         char *escaped;
  58         size_t escaped_cnt=1;
  59
  60         escape_specials(str, NULL, &escaped_cnt);
  61         escaped=malloc(escaped_cnt);
  62         if (!escaped)
  63                 return NULL;
  64
  65         escape_specials(str, escaped, NULL);
  66
  67         return escaped;
  68 }