memnix / memnix-rest

import (

	"github.com/memnix/memnix-rest/config"

	"github.com/pkg/errors"

	"golang.org/x/crypto/bcrypt"

)

// BcryptCrypto is the struct that holds the bcrypt crypto methods

type BcryptCrypto struct {

	Cost int

}

// NewBcryptCrypto returns a new BcryptCrypto

// Hash hashes a password using the bcrypt algorithm

// password is the plaintext password to hash.

// Returns the hashed password, or an error on failure.

// The cost is set in the config file.

//

// see: https://godoc.org/golang.org/x/crypto/bcrypt

// see: utils/config.go for the default cost

func (*BcryptCrypto) Hash(password string) ([]byte, error) {

	key, err := bcrypt.GenerateFromPassword([]byte(password), config.BCryptCost)

	if err != nil {

		return []byte(""), err

	}

	return key, nil

}

// Verify compares a bcrypt hashed password with its possible plaintext equivalent.

// password is the plaintext password to verify.

// hash is the bcrypt hashed password.

// Returns nil on success, or an error on failure.

// Returns true if the password matches, false if it does not.

func (*BcryptCrypto) Verify(password string, hash []byte) (bool, error) {

	err := bcrypt.CompareHashAndPassword(hash, []byte(password))

	if err != nil {

		return false, errors.Wrap(err, errors.New("error comparing bcrypt hash").Error())

	}

	return true, nil

}