-static int ldap_is_attr_oid ( const char *attr )
-{
- int i, c, digit=0;
-
- for( i = 0; (c = attr[i]) != 0; i++ ) {
- if( c >= '0' && c <= '9' ) {
- digit=1;
-
- } else if ( c != '.' ) {
- /* not digit nor '.' */
- return 0;
-
- } else if ( !digit ) {
- /* '.' but prev not digit */
- return 0;
-
- } else {
- /* '.' */
- digit = 0;
- }
- }
-
- return digit;
-}
-
-static int ldap_is_attr_desc ( const char *attr )
-{
- /* cheap attribute description check */
- int i, c;
-
- for( i = 0; (c = attr[i]) != 0; i++ ) {
- if (( c >= '0' && c <= '9' )
- || ( c >= 'A' && c <= 'Z' )
- || ( c >= 'a' && c <= 'z' )
- || ( c == '.' || c == '-' )
- || ( c == ';' )) continue;
-
- return 0;
- }
-
- return i > 0;
-}
-
-static char *
-find_right_paren( char *s )
-{
- int balance, escape;
-
- balance = 1;
- escape = 0;
- while ( *s && balance ) {
- if ( escape == 0 ) {
- if ( *s == '(' )
- balance++;
- else if ( *s == ')' )
- balance--;
- }
- if ( *s == '\\' && ! escape )
- escape = 1;
- else
- escape = 0;
- if ( balance )
- s++;
- }
-
- return( *s ? s : NULL );
-}
-
-static int hex2value( int c )
-{
- if( c >= '0' && c <= '9' ) {
- return c - '0';
- }
-
- if( c >= 'A' && c <= 'F' ) {
- return c + (10 - (int) 'A');
- }
-
- if( c >= 'a' && c <= 'f' ) {
- return c + (10 - (int) 'a');
- }
-
- return -1;
-}
-
-char *
-ldap_pvt_find_wildcard( const char *s )
-{
- for( ; *s != '\0' ; s++ ) {
- switch( *s ) {
- case '*': /* found wildcard */
- return (char *) s;
-
- case '\\':
- s++; /* skip over escape */
- if ( *s == '\0' )
- return NULL; /* escape at end of string */
- }
- }
-
- return NULL;
-}
-
-/* unescape filter value */
-/* support both LDAP v2 and v3 escapes */
-/* output can include nul characters! */
-ber_slen_t
-ldap_pvt_filter_value_unescape( char *fval )
-{
- ber_slen_t r, v;
- int v1, v2;
-
- for( r=v=0; fval[v] != '\0'; v++ ) {
- switch( fval[v] ) {
- case '\\':
- /* escape */
- v++;
-
- if ( fval[v] == '\0' ) {
- /* escape at end of string */
- return -1;
-
- }
-
- if (( v1 = hex2value( fval[v] )) >= 0 ) {
- /* LDAPv3 escape */
- if (( v2 = hex2value( fval[v+1] )) < 0 ) {
- /* must be two digit code */
- return -1;
- }
-
- fval[r++] = v1 * 16 + v2;
- v++;
-
- } else {
- /* LDAPv2 escape */
- switch( fval[v] ) {
- case '(':
- case ')':
- case '*':
- case '\\':
- fval[r++] = fval[v];
- break;
- default:
- /* illegal escape */
- return -1;
- }
- }
- break;
-
- default:
- fval[r++] = fval[v];
- }
- }
-
- fval[r] = '\0';
- return r;
-}
-
-static char *
-put_complex_filter( BerElement *ber, char *str, ber_tag_t tag, int not )
-{
- char *next;
-
- /*
- * We have (x(filter)...) with str sitting on
- * the x. We have to find the paren matching
- * the one before the x and put the intervening
- * filters by calling put_filter_list().
- */
-
- /* put explicit tag */
- if ( ber_printf( ber, "t{" /*}*/, tag ) == -1 )
- return( NULL );
-
- str++;
- if ( (next = find_right_paren( str )) == NULL )
- return( NULL );
-
- *next = '\0';
- if ( put_filter_list( ber, str ) == -1 )
- return( NULL );
- *next++ = ')';
-
- /* flush explicit tagged thang */
- if ( ber_printf( ber, /*{*/ "N}" ) == -1 )
- return( NULL );
-
- return( next );
-}
-
-static int
-put_filter( BerElement *ber, char *str )
-{
- char *next;
- int parens, balance, escape;
-
- /*
- * A Filter looks like this:
- * Filter ::= CHOICE {
- * and [0] SET OF Filter,
- * or [1] SET OF Filter,
- * not [2] Filter,
- * equalityMatch [3] AttributeValueAssertion,
- * substrings [4] SubstringFilter,
- * greaterOrEqual [5] AttributeValueAssertion,
- * lessOrEqual [6] AttributeValueAssertion,
- * present [7] AttributeType,
- * approxMatch [8] AttributeValueAssertion,
- * extensibleMatch [9] MatchingRuleAssertion -- LDAPv3
- * }
- *
- * SubstringFilter ::= SEQUENCE {
- * type AttributeType,
- * SEQUENCE OF CHOICE {
- * initial [0] IA5String,
- * any [1] IA5String,
- * final [2] IA5String
- * }
- * }
- *
- * MatchingRuleAssertion ::= SEQUENCE { -- LDAPv3
- * matchingRule [1] MatchingRuleId OPTIONAL,
- * type [2] AttributeDescription OPTIONAL,
- * matchValue [3] AssertionValue,
- * dnAttributes [4] BOOLEAN DEFAULT FALSE }
- *
- * Note: tags in a choice are always explicit
- */
-
- Debug( LDAP_DEBUG_TRACE, "put_filter \"%s\"\n", str, 0, 0 );
-
- parens = 0;
- while ( *str ) {
- switch ( *str ) {
- case '(':
- str++;
- parens++;
-
- /* skip spaces */
- while( LDAP_SPACE( *str ) ) str++;
-
- switch ( *str ) {
- case '&':
- Debug( LDAP_DEBUG_TRACE, "put_filter: AND\n",
- 0, 0, 0 );
-
- if ( (str = put_complex_filter( ber, str,
- LDAP_FILTER_AND, 0 )) == NULL )
- return( -1 );
-
- parens--;
- break;
-
- case '|':
- Debug( LDAP_DEBUG_TRACE, "put_filter: OR\n",
- 0, 0, 0 );
-
- if ( (str = put_complex_filter( ber, str,
- LDAP_FILTER_OR, 0 )) == NULL )
- return( -1 );
-
- parens--;
- break;
-
- case '!':
- Debug( LDAP_DEBUG_TRACE, "put_filter: NOT\n",
- 0, 0, 0 );
-
- if ( (str = put_complex_filter( ber, str,
- LDAP_FILTER_NOT, 1 )) == NULL )
- return( -1 );
-
- parens--;
- break;
-
- default:
- Debug( LDAP_DEBUG_TRACE, "put_filter: simple\n",
- 0, 0, 0 );
-
- balance = 1;
- escape = 0;
- next = str;
- while ( *next && balance ) {
- if ( escape == 0 ) {
- if ( *next == '(' )
- balance++;
- else if ( *next == ')' )
- balance--;
- }
- if ( *next == '\\' && ! escape )
- escape = 1;
- else
- escape = 0;
- if ( balance )
- next++;
- }
- if ( balance != 0 )
- return( -1 );
-
- *next = '\0';
- if ( put_simple_filter( ber, str ) == -1 ) {
- return( -1 );
- }
- *next++ = ')';
- str = next;
- parens--;
- break;
- }
- break;
-
- case ')':
- Debug( LDAP_DEBUG_TRACE, "put_filter: end\n", 0, 0,
- 0 );
- if ( ber_printf( ber, /*[*/ "]" ) == -1 )
- return( -1 );
- str++;
- parens--;
- break;
-
- case ' ':
- str++;
- break;
-
- default: /* assume it's a simple type=value filter */
- Debug( LDAP_DEBUG_TRACE, "put_filter: default\n", 0, 0,
- 0 );
- next = strchr( str, '\0' );
- if ( put_simple_filter( ber, str ) == -1 ) {
- return( -1 );
- }
- str = next;
- break;
- }
- }
-
- return( parens ? -1 : 0 );
-}
-
-/*
- * Put a list of filters like this "(filter1)(filter2)..."
- */
-
-static int
-put_filter_list( BerElement *ber, char *str )
-{
- char *next;
- char save;
-
- Debug( LDAP_DEBUG_TRACE, "put_filter_list \"%s\"\n", str, 0, 0 );
-
- while ( *str ) {
- while ( *str && LDAP_SPACE( (unsigned char) *str ) )
- str++;
- if ( *str == '\0' )
- break;
-
- if ( (next = find_right_paren( str + 1 )) == NULL )
- return( -1 );
- save = *++next;
-
- /* now we have "(filter)" with str pointing to it */
- *next = '\0';
- if ( put_filter( ber, str ) == -1 )
- return( -1 );
- *next = save;
-
- str = next;
- }
-
- return( 0 );
-}
-
-static int
-put_simple_filter(
- BerElement *ber,
- char *str )
-{
- char *s;
- char *value;
- ber_tag_t ftype;
- int rc = -1;
-
- Debug( LDAP_DEBUG_TRACE, "put_simple_filter \"%s\"\n", str, 0, 0 );
-
- str = LDAP_STRDUP( str );
- if( str == NULL ) return -1;
-
- if ( (s = strchr( str, '=' )) == NULL ) {
- goto done;
- }
-
- value = s + 1;
- *s-- = '\0';
-
- switch ( *s ) {
- case '<':
- ftype = LDAP_FILTER_LE;
- *s = '\0';
- if(! ldap_is_attr_desc( str ) ) goto done;
- break;
-
- case '>':
- ftype = LDAP_FILTER_GE;
- *s = '\0';
- if(! ldap_is_attr_desc( str ) ) goto done;
- break;
-
- case '~':
- ftype = LDAP_FILTER_APPROX;
- *s = '\0';
- if(! ldap_is_attr_desc( str ) ) goto done;
- break;
-
- case ':':
- /* RFC2254 extensible filters are off the form:
- * type [:dn] [:rule] := value
- * or [:dn]:rule := value
- */
- ftype = LDAP_FILTER_EXT;
- *s = '\0';
-
- {
- char *dn = strchr( str, ':' );
- char *rule = NULL;
-
- if( dn == NULL ) {
- if(! ldap_is_attr_desc( str ) ) goto done;
- } else {
-
- *dn++ = '\0';
- rule = strchr( dn, ':' );
-
- if( rule == NULL ) {
- /* one colon */
- if ( strcmp(dn, "dn") == 0 ) {
- /* must have attribute */
- if( !ldap_is_attr_desc( str ) ) {
- goto done;
- }
-
- rule = "";
-
- } else {
- rule = dn;
- dn = NULL;
- }
-
- } else {
- /* two colons */
- *rule++ = '\0';
-
- if ( strcmp(dn, "dn") != 0 ) {
- /* must have "dn" */
- goto done;
- }
- }
-
- }
-
- if ( *str == '\0' && ( !rule || *rule == '\0' ) ) {
- /* must have either type or rule */
- goto done;
- }
-
- if ( *str != '\0' && !ldap_is_attr_desc( str ) ) {
- goto done;
- }
-
- if ( rule && *rule != '\0' && !ldap_is_attr_oid( rule ) ) {
- goto done;
- }
-
- rc = ber_printf( ber, "t{" /*}*/, ftype );
-
- if( rc != -1 && rule && *rule != '\0' ) {
- rc = ber_printf( ber, "ts", LDAP_FILTER_EXT_OID, rule );
- }
- if( rc != -1 && *str != '\0' ) {
- rc = ber_printf( ber, "ts", LDAP_FILTER_EXT_TYPE, str );
- }
-
- if( rc != -1 ) {
- ber_slen_t len = ldap_pvt_filter_value_unescape( value );
-
- if( len >= 0 ) {
- rc = ber_printf( ber, "totbN}",
- LDAP_FILTER_EXT_VALUE, value, len,
- LDAP_FILTER_EXT_DNATTRS, dn != NULL);
- } else {
- rc = -1;
- }
- }
- }
- goto done;
-
- default:
- if ( ldap_pvt_find_wildcard( value ) == NULL ) {
- ftype = LDAP_FILTER_EQUALITY;
- } else if ( strcmp( value, "*" ) == 0 ) {
- ftype = LDAP_FILTER_PRESENT;
- } else {
- rc = put_substring_filter( ber, str, value );
- goto done;
- }
- break;
- }
-
- if ( ftype == LDAP_FILTER_PRESENT ) {
- rc = ber_printf( ber, "ts", ftype, str );
-
- } else {
- ber_slen_t len = ldap_pvt_filter_value_unescape( value );
-
- if( len >= 0 ) {
- rc = ber_printf( ber, "t{soN}",
- ftype, str, value, len );
- }
- }
-
- if( rc != -1 ) rc = 0;
-
-done:
- LDAP_FREE( str );
- return rc;
-}
-
-static int
-put_substring_filter( BerElement *ber, char *type, char *val )
-{
- char *nextstar, gotstar = 0;
- ber_tag_t ftype = LDAP_FILTER_SUBSTRINGS;
-
- Debug( LDAP_DEBUG_TRACE, "put_substring_filter \"%s=%s\"\n", type,
- val, 0 );
-
- if ( ber_printf( ber, "t{s{", ftype, type ) == -1 )
- return( -1 );
-
- for( ; val != NULL; val=nextstar ) {
- if ( (nextstar = ldap_pvt_find_wildcard( val )) != NULL )
- *nextstar++ = '\0';
-
- if ( gotstar == 0 ) {
- ftype = LDAP_SUBSTRING_INITIAL;
- } else if ( nextstar == NULL ) {
- ftype = LDAP_SUBSTRING_FINAL;
- } else {
- ftype = LDAP_SUBSTRING_ANY;
- }
-
- if ( *val != '\0' ) {
- ber_slen_t len = ldap_pvt_filter_value_unescape( val );
-
- if ( len < 0 ) {
- return -1;
- }
-
- if ( ber_printf( ber, "to", ftype, val, len ) == -1 ) {
- return( -1 );
- }
- }
-
- gotstar = 1;
- }
-
- if ( ber_printf( ber, /* {{ */ "N}N}" ) == -1 )
- return( -1 );
-
- return( 0 );
-}
-