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manager.go
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manager.go
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package password
import (
"encoding/hex"
"github.com/pkg/errors"
"github.com/zalopay-oss/tokeny/pkg/keyvalue"
"golang.org/x/crypto/bcrypt"
)
const (
keyPassword = "password"
)
type manager struct {
kvStore keyvalue.Store
}
func NewManager(kvStore keyvalue.Store) *manager {
return &manager{kvStore: kvStore}
}
func (m *manager) IsRegistered() (bool, error) {
_, err := m.kvStore.Get(keyPassword)
if err == nil {
return true, nil
}
if errors.Is(err, keyvalue.ErrNoRecord) {
return false, nil
}
return false, err
}
func (m *manager) Register(pwd string, rePwd string) error {
saltedPwd, err := bcrypt.GenerateFromPassword([]byte(pwd), bcrypt.DefaultCost)
if err != nil {
return err
}
err = bcrypt.CompareHashAndPassword(saltedPwd, []byte(rePwd))
if err != nil {
if errors.Is(err, bcrypt.ErrMismatchedHashAndPassword) {
return ErrPasswordsMismatch
}
return err
}
err = m.kvStore.Set(keyPassword, hex.EncodeToString(saltedPwd))
if err != nil {
return err
}
return nil
}
func (m *manager) Login(pwd string) error {
savedPwdHexStr, err := m.kvStore.Get(keyPassword)
if err != nil {
if errors.Is(err, keyvalue.ErrNoRecord) {
return ErrNotRegistered
}
return err
}
savedPwd, err := hex.DecodeString(savedPwdHexStr)
if err != nil {
return err
}
err = bcrypt.CompareHashAndPassword(savedPwd, []byte(pwd))
if err != nil {
if errors.Is(err, bcrypt.ErrMismatchedHashAndPassword) {
return ErrWrongPassword
}
return err
}
return nil
}