예제 #1
0
    static yastr
spf_macro_expand( struct spf *s, const yastr domain, const yastr macro )
{
    int			urlescape, rtransform;
    long		dtransform, i, j;
    char		*p, *pp;
    char		delim;
    yastr		expanded, tmp, escaped;
    yastr		*split;
    size_t		tok_count;

    expanded = yaslempty( );
    escaped = yaslempty( );
    tmp = yaslempty( );

    for ( p = macro ; *p != '\0' ; p++ ) {
	if ( *p != '%' ) {
	    expanded = yaslcatlen( expanded, p, 1 );
	    continue;
	}
	p++;
	switch( *p ) {
	case '%':
	    expanded = yaslcat( expanded, "%" );
	    break;
	case '_':
	    expanded = yaslcat( expanded, "_" );
	    break;
	case '-':
	    expanded = yaslcat( expanded, "%20" );
	    break;
	case '{':
	    p++;
	    /* RFC 7208 7.3 Macro Processing Details
	     * Uppercase macros expand exactly as their lowercase equivalents,
	     * and are then URL escaped.
	     */
	    urlescape = isupper( *p );
	    switch( *p ) {
		case 'S':
		case 's':
		    yaslclear( tmp );
		    tmp = yaslcatprintf( tmp, "%s@%s", s->spf_localpart,
			    s->spf_domain );
		    break;
		case 'L':
		case 'l':
		    tmp = yaslcpy( tmp, s->spf_localpart );
		    break;
		case 'O':
		case 'o':
		    tmp = yaslcpy( tmp, s->spf_domain );
		    break;
		case 'D':
		case 'd':
		    tmp = yaslcpy( tmp, domain );
		    break;
		case 'I':
		case 'i':
		    if ( s->spf_sockaddr->sa_family == AF_INET ) {
			tmp = yaslgrowzero( tmp, INET_ADDRSTRLEN );
			if ( inet_ntop( s->spf_sockaddr->sa_family,
				&((struct sockaddr_in *)s->spf_sockaddr)->sin_addr,
				tmp, (socklen_t)yasllen( tmp )) == NULL ) {
			    goto error;
			}
			yaslupdatelen( tmp );
		    }
		    break;
		case 'P':
		case 'p':
		    /* This is overly complex and should not be used,
		     * so we're not going to implement it. */
		    tmp = yaslcpy( tmp, "unknown" );
		    break;
		case 'V':
		case 'v':
		    tmp = yaslcpy( tmp, ( s->spf_sockaddr->sa_family == AF_INET6 ) ?
			    "ip6" : "in-addr" );
		    break;
		case 'H':
		case 'h':
		    tmp = yaslcpy( tmp, s->spf_helo );
		    break;
		default:
		    syslog( LOG_WARNING,
			    "SPF %s [%s]: invalid macro-letter: %c",
			    s->spf_domain, domain, *p );
		    goto error;
	    }

	    if ( urlescape ) {
		/* RFC 7208 7.3 Macro Processing Details
		 * Uppercase macros expand exactly as their lowercase
		 * equivalents, and are then URL escaped. URL escaping MUST be
		 * performed for characters not in the "unreserved" set, which
		 * is defined in [RFC3986].
		 */
		yaslclear( escaped );
		for ( pp = tmp ; *pp != '\0' ; pp++ ) {
		    /* RFC 3986 2.3 Unreserved Characters
		     * Characters that are allowed in a URI but do not have a
		     * reserved purpose are called unreserved.  These include
		     * uppercase and lowercase letters, decimal digits, hyphen,
		     * period, underscore, and tilde.
		     */
		    if ( isalnum( *pp ) || *pp == '-' || *pp == '.' ||
			    *pp == '_' || *pp == '~' ) {
			escaped = yaslcatlen( escaped, pp, 1 );
		    } else {
			/* Reserved */
			escaped = yaslcatprintf( escaped, "%%%X", *pp );
		    }
		}
		tmp = yaslcpylen( tmp, escaped, yasllen( escaped ));
	    }
	    p++;

	    /* Check for transformers */
	    dtransform = 0;
	    rtransform = 0;
	    if ( isdigit( *p )) {
		dtransform = strtoul( p, &pp, 10 );
		p = pp;
	    }

	    if ( *p == 'r' ) {
		rtransform = 1;
		p++;
	    }

	    delim = '\0';
	    for ( pp = p ; *pp != '\0' ; pp++ ) {
		if ( *pp == '}' ) {
		    break;
		}
		switch( *pp ) {
		/* RFC 7208 7.1 Formal Specification
		 * delimiter        = "." / "-" / "+" / "," / "/" / "_" / "="
		 */
		case '.':
		case '-':
		case '+':
		case ',':
		case '/':
		case '_':
		case '=':
			if ( delim != '\0' ) {
			    tmp = yaslmapchars( tmp, pp, &delim, 1 );
			} else {
			    delim = *pp;
			}
		    break;
		default:
		    syslog( LOG_WARNING, "SPF %s [%s]: invalid delimiter: %c",
			    s->spf_domain, domain, *pp );
		    goto error;
		}
	    }

	    if (( rtransform == 1 ) || ( dtransform > 0 ) ||
		    ( delim != '\0' )) {
		if ( delim == '\0' ) {
		    delim = '.';
		}
		split = yaslsplitlen( tmp, yasllen( tmp ), &delim, 1,
		    &tok_count );
		yaslclear( tmp );
		if ( rtransform == 1 ) {
		    if (( dtransform > 0 ) && ( tok_count > dtransform )) {
			j = tok_count - dtransform;
		    } else {
			j = 0;
		    }
		    for ( i = tok_count - 1 ; i >= j ; i-- ) {
			if ( yasllen( tmp ) > 0 ) {
			    tmp = yaslcat( tmp, "." );
			}
			tmp = yaslcatyasl( tmp, split [ i ] );
		    }
		} else {
		    if (( dtransform > 0 ) && (tok_count > dtransform )) {
			j = dtransform;
		    } else {
			j = tok_count;
		    }
		    for ( i = 0 ; i < j ; i++ ) {
			if ( yasllen( tmp ) > 0 ) {
			    tmp = yaslcat( tmp, "." );
			}
			tmp = yaslcatyasl( tmp, split[ i ] );
		    }
		}
		yaslfreesplitres( split, tok_count );
	    }
	    expanded = yaslcatyasl( expanded, tmp );
	    break;
	default:
	    syslog( LOG_WARNING, "SPF %s [%s]: invalid macro-expand: %s",
		    s->spf_domain, domain, p );
	    goto error;
	}
    }

    if ( yaslcmp( macro, expanded )) {
	simta_debuglog( 3, "SPF %s [%s]: expanded %s to %s",
		s->spf_domain, domain, macro, expanded );
    }

    yaslfree( tmp );
    yaslfree( escaped );
    return( expanded );

error:
    yaslfree( tmp );
    yaslfree( escaped );
    yaslfree( expanded );
    return( NULL );
}
예제 #2
0
    static int
simalias_create( void )
{
    int			linenum = 0, i;
    int			state = ALIAS_WHITE;
    char		rawline[ MAXPATHLEN ];
    yastr		line, key, value;
    char		*p;
#ifdef HAVE_LMDB
    int			rc;
    struct simta_dbh	*dbh = NULL;
#endif /* HAVE_LMDB */

    unlink( output );    

#ifdef HAVE_LMDB
    if (( rc = simta_db_new( &dbh, output )) != 0 ) {
	fprintf( stderr, "simta_db_new: %s: %s\n", output,
		simta_db_strerror( rc ));
	return( 1 );
    }
#else /* HAVE_LMDB */
    fprintf( stderr, "Compiled without DB support, data will not be saved.\n" );
#endif /* HAVE_LMDB */

    line = yaslempty( );
    key = yaslempty( );
    value = yaslempty( );
    while ( fgets( rawline, MAXPATHLEN, finput ) != NULL ) {
	linenum++;

	line = yaslcpy( line, rawline );
	yasltrim( line, " \f\n\r\t\v" );

	/* Blank line or comment */
	if (( *line == '\0' ) || ( *line == '#' )) {
	    continue;
	}

	yasltolower( line );
	line = yaslcatlen( line, "\n", 1 );

	if ( isspace( *rawline )) {
	    if ( state == ALIAS_WHITE ) {
		/* How unexpected. */
		fprintf( stderr, "%s line %d: Unexpected continuation line.\n",
			input, linenum );
		state = ALIAS_CONT;
	    }
	} else if ( state == ALIAS_CONT ) {
	    fprintf( stderr, "%s line %d: Expected a continuation line.\n",
		    input, linenum );
	    state = ALIAS_WHITE;
	}

	if ( state == ALIAS_WHITE ) {
	    if (( p = strchr( line, ':' )) != NULL ) {
		key = yaslcpylen( key, line, (size_t) ( p - line ));
		yaslrange( line, p - line + 1, -1 );

		if ( strncmp( key, "owner-", 6 ) == 0 ) {
		    /* Canonicalise sendmail-style owner */
		    if ( verbose ) {
			fprintf ( stderr, "%s line %d: noncanonical owner %s "
				"will be made canonical\n",
				input, linenum, key );
		    }
		    yaslrange( key, 6, -1 );
		    key = yaslcat( key, "-errors" );
		} else if ((( p = strrchr( key, '-' )) != NULL ) &&
			(( strcmp( p, "-owner" ) == 0 ) ||
			( strcmp( p, "-owners" ) == 0 ) ||
			( strcmp( p, "-error" ) == 0 ) ||
			( strcmp( p, "-request" ) == 0 ) ||
			( strcmp( p, "-requests" ) == 0 ))) {
		    /* Canonicalise simta-style owner */
		    if ( verbose ) {
			fprintf ( stderr, "%s line %d: noncanonical owner %s "
				"will be made canonical\n",
				input, linenum, key );
		    }
		    yaslrange( key, 0, p - key );
		    key = yaslcat( key, "-errors" );
		}
	    } else {
		fprintf( stderr,
			"%s line %d: Expected a colon somewhere. Skipping.\n",
			input, linenum );
		continue;
	    }
	} else {
	    state = ALIAS_WHITE;
	}

	i = 0;
	yaslclear( value );
	for ( p = line ; *p != '\0' ; p++ ) {
	    if ( *p == '"' ) {
		if ( i > 0 && ( value[ i - 1 ] == '\\' )) {
		    value[ i - 1 ] = '"';
		} else if ( state == ALIAS_QUOTE ) {
		    state = ALIAS_WHITE;
		    if ( *value == '\0' ) {
			fprintf( stderr, "%s line %d: Empty quoted value.\n",
				input, linenum );
		    }
		} else if ( state == ALIAS_WORD ) {
		    fprintf( stderr, "%s line %d: Unexpected quote.\n",
			input, linenum );
		} else {
		    state = ALIAS_QUOTE;
		}
	    } else if ( *p == ',' ) {
		switch ( state ) {
		case ALIAS_QUOTE:
		    value = yaslcatlen( value, p, 1 );
		    break;
		case ALIAS_CONT:
		    fprintf( stderr, "%s line %d: Empty list element.\n",
			    input, linenum );
		    break;
		default :
		    state = ALIAS_CONT;
		}
	    } else if ( isspace( *p )) {
		switch ( state ) {
		case ALIAS_QUOTE:
		    value = yaslcatlen( value, p, 1 );
		    break;
		case ALIAS_WORD :
		    state = ALIAS_WHITE;
		    break;
		default :
		    break;
		}
	    } else {
		if ( state == ALIAS_WHITE || state == ALIAS_CONT ) {
		    state = ALIAS_WORD;
		}
		value = yaslcatlen( value, p, 1 );
	    }

	    if ( *value != '\0' &&
		    ( state == ALIAS_WHITE || state == ALIAS_CONT )) {

		/* Check for known but unsupported syntax */
		if ( *value == '/' ) {
		    /* We have special support for nullrouting, so that's OK. */
		    if ( strcmp( value, "/dev/null" ) != 0 ) {
			fprintf( stderr,
				"%s line %d: Unsupported: delivery to file\n",
				input, linenum );
		    }
		} else if ( *value == '|' ) {
		    fprintf( stderr, "%s line %d: Unsupported: delivery to pipe\n",
			    input, linenum );
		} else if ( strncmp( value, ":include:", 9 ) == 0 ) {
		    fprintf( stderr, "%s line %d: Unsupported: file include\n",
			    input, linenum );
#ifdef HAVE_LMDB
		} else if (( rc = simta_db_put( dbh, key, value )) != 0 ) {
		    fprintf( stderr, "simta_db_put: %s: %s\n", input,
			    simta_db_strerror( rc ));
		    return( 1 );
#endif /* HAVE_LMDB */
		} else if ( verbose ) {
		    printf( "%s line %d: Added %s -> %s\n",
			    input, linenum, key, value );
		}

		yaslclear( value );
		i = 0;
	    }
	}
    }

#ifdef HAVE_LMDB
    simta_db_close( dbh );
    if ( verbose ) printf( "%s: created\n", output );
#else /* HAVE_LMDB */
    if ( verbose ) printf( "%s: not created\n", output );
#endif /* HAVE_LMDB */

    yaslfree( line );
    yaslfree( key );
    yaslfree( value );

    return( 0 );
}