com.develop.mnemonic

类 MnemonicUtils

java.lang.Object

com.develop.mnemonic.MnemonicUtils

public class MnemonicUtils
extends java.lang.Object

source org.web3j.crypto.MnemonicUtils 更改助记词读取方式

构造器概要

构造器

构造器和说明
MnemonicUtils()

方法概要

限定符和类型	方法和说明
static java.lang.String	generateMnemonic() 生成助记词, 默认生成英文， 12个单词
static java.lang.String	generateMnemonic(byte[] initialEntropy, WordList wordList) The mnemonic must encode entropy in a multiple of 32 bits.
static java.lang.String	generateMnemonic(WordList type) 生成助记词
static byte[]	generateSeed(java.lang.String mnemonic, java.lang.String passphrase) To create a binary seed from the mnemonic, we use the PBKDF2 function with a mnemonic sentence (in UTF-8 NFKD) used as the password and the string "mnemonic" + passphrase (again in UTF-8 NFKD) used as the salt.
static void	main(java.lang.String[] args)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

MnemonicUtils

public MnemonicUtils()

方法详细资料

generateMnemonic

public static java.lang.String generateMnemonic()

生成助记词, 默认生成英文， 12个单词

返回:

generateMnemonic

public static java.lang.String generateMnemonic(WordList type)

生成助记词

参数:

type -

返回:

generateMnemonic

public static java.lang.String generateMnemonic(byte[] initialEntropy,
                                                WordList wordList)

The mnemonic must encode entropy in a multiple of 32 bits. With more entropy security is improved but the sentence length increases. We refer to the initial entropy length as ENT. The allowed size of ENT is 128-256 bits.

Mnemonic generation algorithm

Given a randomly generated initial entropy of size ENT, first a checksum is generated by taking the first ENT / 32 bits of its SHA256 hash. This checksum is appended to the end of the initial entropy. Next, these concatenated bits are split into groups of 11 bits, each encoding a number from 0-2047, serving as an index into a wordlist. Finally, we convert these numbers into words and use the joined words as a mnemonic sentence.

参数:

initialEntropy - The initial entropy to generate mnemonic from

返回:

The generated mnemonic

抛出:

java.lang.IllegalArgumentException - If the given entropy is invalid

generateSeed

public static byte[] generateSeed(java.lang.String mnemonic,
                                  java.lang.String passphrase)

To create a binary seed from the mnemonic, we use the PBKDF2 function with a mnemonic sentence (in UTF-8 NFKD) used as the password and the string "mnemonic" + passphrase (again in UTF-8 NFKD) used as the salt. The iteration count is set to 2048 and HMAC-SHA512 is used as the pseudo-random function. The length of the derived key is 512 bits (= 64 bytes).

参数:

mnemonic - The input mnemonic which should be 128-160 bits in length containing only valid words

passphrase - The passphrase which will be used as part of salt for PBKDF2 function

返回:

Byte array representation of the generated seed

main

public static final void main(java.lang.String[] args)