Remove unused code.

gnmi_server/pamAuth.go

@@ -2,9 +2,7 @@ package gnmi
 
 import (
 	"github.com/sonic-net/sonic-gnmi/common_utils"
-	"errors"
 	"github.com/golang/glog"
-	"github.com/msteinert/pam"
 	"golang.org/x/crypto/ssh"
 	"os/user"
 )
@@ -14,38 +12,6 @@ type UserCredential struct {
 	Password string
 }
 
-//PAM conversation handler.
-func (u UserCredential) PAMConvHandler(s pam.Style, msg string) (string, error) {
-
-	switch s {
-	case pam.PromptEchoOff:
-		return u.Password, nil
-	case pam.PromptEchoOn:
-		return u.Password, nil
-	case pam.ErrorMsg:
-		return "", nil
-	case pam.TextInfo:
-		return "", nil
-	default:
-		return "", errors.New("unrecognized conversation message style")
-	}
-}
-
-// PAMAuthenticate performs PAM authentication for the user credentials provided
-func (u UserCredential) PAMAuthenticate() error {
-	tx, err := pam.StartFunc("login", u.Username, u.PAMConvHandler)
-	if err != nil {
-		return err
-	}
-	return tx.Authenticate(0)
-}
-
-func PAMAuthUser(u string, p string) error {
-
-	cred := UserCredential{u, p}
-	err := cred.PAMAuthenticate()
-	return err
-}
 func GetUserRoles(usr *user.User) ([]string, error) {
 	// Lookup Roles
 	gids, err := usr.GroupIds()
@@ -62,6 +28,7 @@ func GetUserRoles(usr *user.User) ([]string, error) {
 	}
 	return roles, nil
 }
+
 func PopulateAuthStruct(username string, auth *common_utils.AuthInfo, r []string) error {
 	if len(r) == 0 {
 		AuthLock.Lock()
@@ -91,7 +58,6 @@ func UserPwAuth(username string, passwd string) (bool, error) {
 	 * /etc of host with /etc of container. For now disable this and use ssh
 	 * for authentication.
 	 */
-	// err := PAMAuthUser(username, passwd)
 
 	//Use ssh for authentication.
 	config := &ssh.ClientConfig{

go.mod

@@ -18,7 +18,6 @@ require (
 	github.com/jipanyang/gnmi v0.0.0-20180820232453-cb4d464fa018 // indirect
 	github.com/jipanyang/gnxi v0.0.0-20181221084354-f0a90cca6fd0
 	github.com/kylelemons/godebug v1.1.0 // indirect
-	github.com/msteinert/pam v0.0.0-20201130170657-e61372126161
 	github.com/onsi/ginkgo v1.10.3 // indirect
 	github.com/onsi/gomega v1.7.1 // indirect
 	github.com/openconfig/gnmi v0.0.0-20200617225440-d2b4e6a45802