package libauth import (	"os"	"strings"	"unicode/utf8") func getkey(params string) error {	p, e := os.StartProcess(factotum, []string{"getkey", "-g", params},		&os.ProcAttr{Files: []*os.File{os.Stdin, os.Stdout, os.Stderr}})	if e != nil {		return e	}	_, e = p.Wait()	return e} var qsep = " \t\r\n" func qtoken(t, sep string) (tok, rest string) {	quoting := false 	for len(t) > 0 {		r, width := utf8.DecodeRuneInString(t)		if !(quoting || !strings.ContainsRune(sep, r)) {			break		} 		if r != '\'' {			tok += t[:width]			t = t[width:]			continue		} 		/* r is a quote */		if !quoting {			quoting = true			t = t[width:]			continue		} 		/* quoting and we're on a quote */		if len(t) > 1 && t[1] != '\'' {			quoting = false			t = t[width:]			continue		} 		/* doubled quote; fold one quote into two */		t = t[width:]		_, width = utf8.DecodeRuneInString(t)		tok += t[:width]	} 	return tok, t} func tokenize(s string) []string {	var ss []string 	for len(s) > 0 {		// skip ws		for {			r, width := utf8.DecodeRuneInString(s)			if !strings.ContainsRune(qsep, r) {				break			}			s = s[width:]		} 		tok, rest := qtoken(s, qsep)		ss = append(ss, tok)		s = rest	} 	return ss} // given a string of the form 'proto=foo service=bar user=baz', tokenize it into a map.func attrmap(s string) map[string]string {	attrmap := make(map[string]string) 	strs := tokenize(s)	for _, av := range strs {		a := strings.Split(av, "=")		if len(a) == 1 {			attrmap[a[0]] = ""		} else {			attrmap[a[0]] = a[1]		}	} 	return attrmap}