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hasher.go
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/
hasher.go
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// Copyright (c) Mainflux
// SPDX-License-Identifier: Apache-2.0
// Package bcrypt provides a hasher implementation utilizing bcrypt.
package bcrypt
import (
"github.com/mainflux/mainflux/pkg/errors"
"github.com/mainflux/mainflux/users"
"golang.org/x/crypto/bcrypt"
)
const cost int = 10
var (
errHashPassword = errors.New("Generate hash from password failed")
errComparePassword = errors.New("Compare hash and password failed")
)
var _ users.Hasher = (*bcryptHasher)(nil)
type bcryptHasher struct{}
// New instantiates a bcrypt-based hasher implementation.
func New() users.Hasher {
return &bcryptHasher{}
}
func (bh *bcryptHasher) Hash(pwd string) (string, error) {
hash, err := bcrypt.GenerateFromPassword([]byte(pwd), cost)
if err != nil {
return "", errors.Wrap(errHashPassword, err)
}
return string(hash), nil
}
func (bh *bcryptHasher) Compare(plain, hashed string) error {
err := bcrypt.CompareHashAndPassword([]byte(hashed), []byte(plain))
if err != nil {
return errors.Wrap(errComparePassword, err)
}
return nil
}