crypto

README

crypto

crypto is a cryptography library used in NKN.

Usage

import "github.com/nknorg/crypto"

Digest

• SHA256

	SHA256.Hash(value []byte) []byte

• SHA3_256

	SHA3_256.Hash(value []byte) []byte

• RIPEMD160

	RIPEMD160.Hash(value []byte) []byte

Cipher

• AES-CBC

   ToAesKey(pwd []byte) []byte
   AesEncrypt(plaintext []byte, key []byte, iv []byte)  ([]byte, error)
   AesDecrypt(ciphertext []byte, key []byte, iv []byte) ([]byte, error)

Signature

• Generate Key

	// ECDSA(p256r1)
	P256R1.New() (*Keypair, error)
	// ED25519
	ED25519.New() (*Keypair, error)

• Sign & Verify

	type PubKey interface {
		EqualTo(pk PubKey) bool
		Compress(isCommpressed bool) ([]byte, error)
		DeCompress(encodeData []byte) error
		Marshal() ([]byte, error)
		Unmarshal(data []byte) error
		Verify(data []byte, signature []byte) error
	}

	type PrivKey interface {
		PublicKey() PubKey
		Marshal() ([]byte, error)
		Unmarshal(data []byte) error
		Sign(data []byte) ([]byte, error)
	}

	type Keypair struct {
		pk PubKey
		sk PrivKey
	}

Random number

	RandBytes(b []byte) (n int, err error)

License

crypto is under APACHE-2.0 license. See LICENSE for details.

Documentation

Index

• Constants
• func AesDecrypt(ciphertext []byte, key []byte, iv []byte) ([]byte, error)
• func AesEncrypt(plaintext []byte, key []byte, iv []byte) ([]byte, error)
• func RandBytes(b []byte) (n int, err error)
• func ToAesKey(pwd []byte) []byte
• type HASH
  • func (h HASH) Hash(value []byte) []byte
  • func (h HASH) Name() string
  • func (h HASH) Size() int
• type SIGALGO
  • func (sig SIGALGO) New() (*signature.Keypair, error)

Constants

const (
	HASH256_LEN = 32
	HASH160_LEN = 20
)

Functions

func AesDecrypt

func AesDecrypt(ciphertext []byte, key []byte, iv []byte) ([]byte, error)

func AesEncrypt

func AesEncrypt(plaintext []byte, key []byte, iv []byte) ([]byte, error)

func RandBytes

func RandBytes(b []byte) (n int, err error)

func ToAesKey

func ToAesKey(pwd []byte) []byte

Types

type HASH

type HASH uint32

const (
	SHA256    HASH = 1
	SHA3_256  HASH = 2
	RIPEMD160 HASH = 3
)

func (HASH) Hash

func (h HASH) Hash(value []byte) []byte

func (HASH) Name

func (h HASH) Name() string

func (HASH) Size

func (h HASH) Size() int

type SIGALGO

type SIGALGO uint32

const (
	P256R1  SIGALGO = 1
	ED25519 SIGALGO = 2
)

func (SIGALGO) New

func (sig SIGALGO) New() (*signature.Keypair, error)