1 /* 2 * Copyright © 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io> 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 * @author Aeneas Rekkas <aeneas+oss@aeneas.io> 17 * @copyright 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io> 18 * @license Apache-2.0 19 * 20 */ 21 22 package fosite 23 24 import ( 25 "context" 26 27 "github.com/ory/x/errorsx" 28 29 "golang.org/x/crypto/bcrypt" 30 ) 31 32 const DefaultBCryptWorkFactor = 12 33 34 // BCrypt implements the Hasher interface by using BCrypt. 35 type BCrypt struct { 36 WorkFactor int 37 } 38 39 func (b *BCrypt) Hash(ctx context.Context, data []byte) ([]byte, error) { 40 if b.WorkFactor == 0 { 41 b.WorkFactor = DefaultBCryptWorkFactor 42 } 43 s, err := bcrypt.GenerateFromPassword(data, b.WorkFactor) 44 if err != nil { 45 return nil, errorsx.WithStack(err) 46 } 47 return s, nil 48 } 49 50 func (b *BCrypt) Compare(ctx context.Context, hash, data []byte) error { 51 if err := bcrypt.CompareHashAndPassword(hash, data); err != nil { 52 return errorsx.WithStack(err) 53 } 54 return nil 55 } 56