/
encryption_utils.go
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/
encryption_utils.go
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/**
* (C) Copyright 2014, Deft Labs
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package dlshared
import "code.google.com/p/go.crypto/bcrypt"
// Encrypt a password. The cost option is 4 - 31. If the cost is above 31,
// then an error is displayed. If the cost is below four, then four is used. If a
// nil or empty password is passed, this method returns an error.
func HashPassword(password string, cost int) ([]byte, error) {
if len(password) == 0 { return nil, NewStackError("You must pass in a non-empty password") }
return bcrypt.GenerateFromPassword([]byte(password), cost)
}
// Check to see if the password is the same as the hashed value. If the values match,
// true is returned. If a nil or empty password or hash is passed, this method returns an error.
func PasswordMatchesHash(hashedPassword []byte, password string) (bool, error) {
if len(password) == 0 { return false, NewStackError("You must pass in a non-empty password") }
if len(hashedPassword) == 0 { return false, NewStackError("You must pass in a non-empty hashed password") }
err := bcrypt.CompareHashAndPassword(hashedPassword, []byte(password))
return err == nil, nil
}