util

Documentation

Overview

Package common contains various helper functions.

Index

• Constants
• func Bytes2Hex(d []byte) string
• func CopyBytes(b []byte) (copiedBytes []byte)
• func CreateDirIfNotExist(dir string) error
• func Decrypt(cryptograph string, passphrase string) (string, error)
• func DecryptBytes(encryptedJSON []byte, passphrase []byte) ([]byte, error)
• func Encrypt(raw string, passphrase string) (string, error)
• func EncryptBytes(raw []byte, passphrase []byte) ([]byte, error)
• func FromHex(s string) []byte
• func Hash(size int, data ...[]byte) []byte
• func Hash256(data ...[]byte) []byte
• func Hex2Bytes(str string) []byte
• func Hex2BytesFixed(str string, flen int) []byte
• func Hex32ToBytes(s string) [32]byte
• func Hex64ToBytes(s string) [64]byte
• func HexToBytes(s string) []byte
• func LeftPadBytes(slice []byte, l int) []byte
• func ReverseBytes(str []byte) (result []byte)
• func RightPadBytes(slice []byte, l int) []byte
• func ToHex(b []byte) string
• func ToString(v interface{}) string
• func TrimQuotes(s string) string

Constants

const (
	// StandardScryptN is the N parameter of Scrypt encryption algorithm, using 256MB
	// memory and taking approximately 1s CPU time on a modern processor.
	StandardScryptN = 1 << 18

	// StandardScryptP is the P parameter of Scrypt encryption algorithm, using 256MB
	// memory and taking approximately 1s CPU time on a modern processor.
	StandardScryptP = 1
)

Functions

func Bytes2Hex

func Bytes2Hex(d []byte) string

Bytes2Hex returns the hexadecimal encoding of d.

func CopyBytes

func CopyBytes(b []byte) (copiedBytes []byte)

CopyBytes returns an exact copy of the provided bytes.

func CreateDirIfNotExist

func CreateDirIfNotExist(dir string) error

CreateDirIfNotExist create given folder

func Decrypt

func Decrypt(cryptograph string, passphrase string) (string, error)

func DecryptBytes

func DecryptBytes(encryptedJSON []byte, passphrase []byte) ([]byte, error)

DecryptBytes decrypt raw json to raw

func Encrypt

func Encrypt(raw string, passphrase string) (string, error)

func EncryptBytes

func EncryptBytes(raw []byte, passphrase []byte) ([]byte, error)

EncryptBytes encrypts raw by passphrase to json binary

func FromHex

func FromHex(s string) []byte

FromHex returns the bytes represented by the hexadecimal string s. s may be prefixed with "0x".

func Hash

func Hash(size int, data ...[]byte) []byte

func Hash256

func Hash256(data ...[]byte) []byte

func Hex2Bytes

func Hex2Bytes(str string) []byte

Hex2Bytes returns the bytes represented by the hexadecimal string str.

func Hex2BytesFixed

func Hex2BytesFixed(str string, flen int) []byte

Hex2BytesFixed returns bytes of a specified fixed length flen.

func Hex32ToBytes

func Hex32ToBytes(s string) [32]byte

func Hex64ToBytes

func Hex64ToBytes(s string) [64]byte

func HexToBytes

func HexToBytes(s string) []byte

func LeftPadBytes

func LeftPadBytes(slice []byte, l int) []byte

LeftPadBytes zero-pads slice to the left up to length l.

func ReverseBytes

func ReverseBytes(str []byte) (result []byte)

func RightPadBytes

func RightPadBytes(slice []byte, l int) []byte

RightPadBytes zero-pads slice to the right up to length l.

func ToHex

func ToHex(b []byte) string

ToHex returns the hex representation of b, prefixed with '0x'. For empty slices, the return value is "0x0".

Deprecated: use hexutil.Encode instead.

func ToString

func ToString(v interface{}) string

func TrimQuotes

func TrimQuotes(s string) string

TrimQuotes trim quotes of string if quotes exist