git.sur5r.net Git - openldap/blob - servers/slapd/dn.c

   1 /* dn.c - routines for dealing with distinguished names */
   2
   3 #include "portable.h"
   4
   5 #include <stdio.h>
   6
   7 #include <ac/ctype.h>
   8 #include <ac/socket.h>
   9 #include <ac/string.h>
  10 #include <ac/time.h>
  11
  12 #include "slap.h"
  13
  14 #define B4TYPE          0
  15 #define INTYPE          1
  16 #define B4EQUAL         2
  17 #define B4VALUE         3
  18 #define INVALUE         4
  19 #define INQUOTEDVALUE   5
  20 #define B4SEPARATOR     6
  21
  22 /*
  23  * dn_normalize - put dn into a canonical format.  the dn is
  24  * normalized in place, as well as returned.
  25  */
  26
  27 char *
  28 dn_normalize( char *dn )
  29 {
  30         char    *d, *s;
  31         int     state, gotesc;
  32
  33         /* Debug( LDAP_DEBUG_TRACE, "=> dn_normalize \"%s\"\n", dn, 0, 0 ); */
  34
  35         gotesc = 0;
  36         state = B4TYPE;
  37         for ( d = s = dn; *s; s++ ) {
  38                 switch ( state ) {
  39                 case B4TYPE:
  40                         if ( ! SPACE( *s ) ) {
  41                                 state = INTYPE;
  42                                 *d++ = *s;
  43                         }
  44                         break;
  45                 case INTYPE:
  46                         if ( *s == '=' ) {
  47                                 state = B4VALUE;
  48                                 *d++ = *s;
  49                         } else if ( SPACE( *s ) ) {
  50                                 state = B4EQUAL;
  51                         } else {
  52                                 *d++ = *s;
  53                         }
  54                         break;
  55                 case B4EQUAL:
  56                         if ( *s == '=' ) {
  57                                 state = B4VALUE;
  58                                 *d++ = *s;
  59                         } else if ( ! SPACE( *s ) ) {
  60                                 /* not a valid dn - but what can we do here? */
  61                                 *d++ = *s;
  62                         }
  63                         break;
  64                 case B4VALUE:
  65                         if ( *s == '"' ) {
  66                                 state = INQUOTEDVALUE;
  67                                 *d++ = *s;
  68                         } else if ( ! SPACE( *s ) ) {
  69                                 state = INVALUE;
  70                                 *d++ = *s;
  71                         }
  72                         break;
  73                 case INVALUE:
  74                         if ( !gotesc && SEPARATOR( *s ) ) {
  75                                 while ( SPACE( *(d - 1) ) )
  76                                         d--;
  77                                 state = B4TYPE;
  78                                 if ( *s == '+' ) {
  79                                         *d++ = *s;
  80                                 } else {
  81                                         *d++ = ',';
  82                                 }
  83                         } else if ( gotesc && !NEEDSESCAPE( *s ) &&
  84                             !SEPARATOR( *s ) ) {
  85                                 *--d = *s;
  86                                 d++;
  87                         } else {
  88                                 *d++ = *s;
  89                         }
  90                         break;
  91                 case INQUOTEDVALUE:
  92                         if ( !gotesc && *s == '"' ) {
  93                                 state = B4SEPARATOR;
  94                                 *d++ = *s;
  95                         } else if ( gotesc && !NEEDSESCAPE( *s ) ) {
  96                                 *--d = *s;
  97                                 d++;
  98                         } else {
  99                                 *d++ = *s;
 100                         }
 101                         break;
 102                 case B4SEPARATOR:
 103                         if ( SEPARATOR( *s ) ) {
 104                                 state = B4TYPE;
 105                                 *d++ = *s;
 106                         }
 107                         break;
 108                 default:
 109                         Debug( LDAP_DEBUG_ANY,
 110                             "dn_normalize - unknown state %d\n", state, 0, 0 );
 111                         break;
 112                 }
 113                 if ( *s == '\\' ) {
 114                         gotesc = 1;
 115                 } else {
 116                         gotesc = 0;
 117                 }
 118         }
 119         *d = '\0';
 120
 121         /* Debug( LDAP_DEBUG_TRACE, "<= dn_normalize \"%s\"\n", dn, 0, 0 ); */
 122         return( dn );
 123 }
 124
 125 /*
 126  * dn_normalize_case - put dn into a canonical form suitable for storing
 127  * in a hash database.  this involves normalizing the case as well as
 128  * the format.  the dn is normalized in place as well as returned.
 129  */
 130
 131 char *
 132 dn_normalize_case( char *dn )
 133 {
 134         char    *s;
 135
 136         /* normalize format */
 137         dn_normalize( dn );
 138
 139         /* normalize case */
 140         for ( s = dn; *s; s++ ) {
 141                 *s = TOUPPER( *s );
 142         }
 143
 144         return( dn );
 145 }
 146
 147 /*
 148  * dn_parent - return a copy of the dn of dn's parent
 149  */
 150
 151 char *
 152 dn_parent(
 153     Backend     *be,
 154     char        *dn
 155 )
 156 {
 157         char    *s;
 158         int     inquote, gotesc;
 159
 160         if( dn == NULL ) {
 161                 return NULL;
 162         }
 163
 164         while(*dn && SPACE(*dn)) {
 165                 dn++;
 166         }
 167
 168         if( *dn == '\0' ) {
 169                 return( NULL );
 170         }
 171
 172         if ( be_issuffix( be, dn ) ) {
 173                 return( NULL );
 174         }
 175
 176         /*
 177          * no =, assume it is a dns name, like blah@some.domain.name
 178          * if the blah@ part is there, return some.domain.name.  if
 179          * it's just some.domain.name, return domain.name.
 180          */
 181         if ( strchr( dn, '=' ) == NULL ) {
 182                 if ( (s = strchr( dn, '@' )) == NULL ) {
 183                         if ( (s = strchr( dn, '.' )) == NULL ) {
 184                                 return( NULL );
 185                         }
 186                 }
 187                 if ( *(s + 1) == '\0' ) {
 188                         return( NULL );
 189                 } else {
 190                         return( ch_strdup( &s[1] ) );
 191                 }
 192         }
 193
 194         /*
 195          * else assume it is an X.500-style name, which looks like
 196          * foo=bar,sha=baz,...
 197          */
 198
 199         inquote = 0;
 200         for ( s = dn; *s; s++ ) {
 201                 if ( *s == '\\' ) {
 202                         if ( *(s + 1) ) {
 203                                 s++;
 204                         }
 205                         continue;
 206                 }
 207                 if ( inquote ) {
 208                         if ( *s == '"' ) {
 209                                 inquote = 0;
 210                         }
 211                 } else {
 212                         if ( *s == '"' ) {
 213                                 inquote = 1;
 214                         } else if ( DNSEPARATOR( *s ) ) {
 215                                 return( ch_strdup( &s[1] ) );
 216                         }
 217                 }
 218         }
 219
 220         return( ch_strdup( "" ) );
 221 }
 222
 223 /*
 224  * dn_issuffix - tells whether suffix is a suffix of dn.  both dn
 225  * and suffix must be normalized.
 226  */
 227
 228 int
 229 dn_issuffix(
 230     char        *dn,
 231     char        *suffix
 232 )
 233 {
 234         int     dnlen, suffixlen;
 235
 236         if ( dn == NULL ) {
 237                 return( 0 );
 238         }
 239
 240         suffixlen = strlen( suffix );
 241         dnlen = strlen( dn );
 242
 243         if ( suffixlen > dnlen ) {
 244                 return( 0 );
 245         }
 246
 247         return( strcmp( dn + dnlen - suffixlen, suffix ) == 0 );
 248 }
 249
 250 /*
 251  * dn_type - tells whether the given dn is an X.500 thing or DNS thing
 252  * returns (defined in slap.h): DN_DNS          dns-style thing
 253  *                              DN_X500         x500-style thing
 254  */
 255
 256 int
 257 dn_type( char *dn )
 258 {
 259         return( strchr( dn, '=' ) == NULL ? DN_DNS : DN_X500 );
 260 }
 261
 262 char *
 263 dn_upcase( char *dn )
 264 {
 265         char    *s;
 266
 267         /* normalize case */
 268         for ( s = dn; *s; s++ ) {
 269                 *s = TOUPPER( *s );
 270         }
 271
 272         return( dn );
 273 }