hasher

Documentation

Overview

Copyright © 2018 Zhao Ming <mint.zhao.chiu@gmail.com>.

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.

Copyright © 2018 Zhao Ming <mint.zhao.chiu@gmail.com>.

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.

Copyright © 2018 Zhao Ming <mint.zhao.chiu@gmail.com>.

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.

Index

• Variables
• func DeRegisterHasher(hasherName string)
• func RegisterHasher(hasherName string, hasher Hasher) error
• type Hasher
  • func GetHasher(hasherName string) (Hasher, error)
• type MD5Hasher
  • func (h *MD5Hasher) Hash(msg []byte) ([]byte, error)
• type SHA256Hasher
  • func (h *SHA256Hasher) Hash(msg []byte) ([]byte, error)

Variables

var (
	// ErrHasherNotFound is returned when hasher not found
	ErrHasherNotFound = errors.New("hasher not found")

	// ErrHasherAlreadyRegistered is returned when hasher already registered
	ErrHasherAlreadyRegistered = errors.New("hasher already registered")
)

Functions

func DeRegisterHasher

func DeRegisterHasher(hasherName string)

DeRegisterHasher delete hasher form hashes, SHOULD ONLY USED IN TEST

func RegisterHasher

func RegisterHasher(hasherName string, hasher Hasher) error

RegisterHasher stores hash function into hashes, if hashName is already registered, return error

Types

type Hasher

type Hasher interface {

	// Hash hashes messages msg, can customize hash function, default is SHA256.
	Hash(msg []byte) ([]byte, error)
}

hasher contains hash related functions

func GetHasher

func GetHasher(hasherName string) (Hasher, error)

GetHasher return a hash function that already registered in hashes, if not return error

type MD5Hasher

type MD5Hasher struct {
}

func (*MD5Hasher) Hash

func (h *MD5Hasher) Hash(msg []byte) ([]byte, error)

type SHA256Hasher

type SHA256Hasher struct {
}

func (*SHA256Hasher) Hash

func (h *SHA256Hasher) Hash(msg []byte) ([]byte, error)