Support login in freebsd by system user/password

Signed-off-by: Jianhui Zhao <[email protected]>

build.sh

@@ -45,3 +45,6 @@ generate windows 386
 
 generate darwin amd64
 generate darwin 386
+
+generate freebsd amd64
+generate freebsd 386

login_freebsd.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"errors"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/GehirnInc/crypt"
+	_ "github.com/GehirnInc/crypt/apr1_crypt"
+	_ "github.com/GehirnInc/crypt/md5_crypt"
+	_ "github.com/GehirnInc/crypt/sha256_crypt"
+	_ "github.com/GehirnInc/crypt/sha512_crypt"
+)
+
+type spwd struct {
+	sp_namp string
+	sp_pwdp string
+}
+
+func getspnam(name string) (*spwd, error) {
+	/* Disallow potentially-malicious user names */
+	if name == "" || name[0] == '.' || strings.Contains(name, "/") {
+		return nil, errors.New("Invalid")
+	}
+
+	data, err := ioutil.ReadFile("/etc/master.passwd")
+	if err != nil {
+		return nil, err
+	}
+
+	for _, l := range strings.Split(string(data), "\n") {
+		if !strings.HasPrefix(l, name+":") {
+			continue
+		}
+
+		s := strings.Split(l, ":")
+
+		return &spwd{s[0], s[1]}, nil
+	}
+
+	return nil, errors.New("Not found")
+}
+
+func checkUser() bool {
+	return os.Getuid() == 0
+}
+
+func login(username, password string) bool {
+	sp, _ := getspnam(username)
+	if sp == nil {
+		return false
+	}
+
+	c := crypt.NewFromHash(sp.sp_pwdp)
+	return c.Verify(sp.sp_pwdp, []byte(password)) == nil
+}