从比特币私钥中检索公钥

Question

我如何从比特币私钥中获取比特币地址。

我了解整个方法，除了第一个方法，公钥及其 x 和 y 线来自哈希/私钥。

如果我能在 php 中获得代码示例，那对我会更有帮助。

Answer 1

这是一个 NodeJS 脚本，从 WIF -> 私钥 -> 公钥 -> 二进制地址 -> 人类可读地址

// EXAMPLE: node wif_details.js 5JuHN27YsJktraQYGgLeihxZ2bwQbFANFdpc8gtDgqyyJsZJQB6

const ecc = require('eosjs-ecc');
const base58 = require('bs58');
const ripemd160 = require('ripemd160')

const wif = process.argv[2];
console.log("WIF: ", wif);

const privkey = ecc.PrivateKey.fromString(wif);
console.log("Private Key: ", privkey.toBuffer().toString('hex'));

const compressed_pubkey = privkey.toPublic();
const uncompressed_pubkey = compressed_pubkey.toUncompressed();
console.log("Public key (compressed): ", compressed_pubkey.toHex());
console.log("Public key: ", uncompressed_pubkey.toHex());

const hash1 = ecc.sha256(compressed_pubkey.toBuffer());
const hash2 = new ripemd160().update(Buffer.from(hash1, 'hex')).digest('hex');
const hash3 = ecc.sha256(uncompressed_pubkey.toBuffer());
const hash4 = new ripemd160().update(Buffer.from(hash3, 'hex')).digest('hex');
const with_prefix_compressed = '00' + hash2;
const with_prefix_uncompressed = '00' + hash4;

const hash5 = ecc.sha256(Buffer.from(with_prefix_compressed, 'hex'));
const hash6 = ecc.sha256(Buffer.from(hash5, 'hex'));
const hash7 = ecc.sha256(Buffer.from(with_prefix_uncompressed, 'hex'));
const hash8 = ecc.sha256(Buffer.from(hash7, 'hex'));
const binary_address_compressed = with_prefix_compressed + hash6.slice(0,8);
const binary_address_uncompressed = with_prefix_uncompressed + hash8.slice(0,8);
console.log("Binary address (compressed): ", binary_address_compressed);
console.log("Binary address: ", binary_address_uncompressed);

const bitcoin_address_compressed = base58.encode(Buffer.from(binary_address_compressed, 'hex'));
const bitcoin_address_uncompressed = base58.encode(Buffer.from(binary_address_uncompressed, 'hex'));
console.log("Bitcoin address (compressed): ", bitcoin_address_compressed);
console.log("Bitcoin address: ", bitcoin_address_uncompressed);

Answer 2

对于初学者来说，请使用以下库：

https://github.com/RobKohr/PHP-Bitcoin-Address-Creator

您可以选择使用 vanitygen 的后端并通过exec()、shell_exec() 甚至更好的escapeshellarg() 生成地址。除了这两种方法之外，您的选择是使用 bitcoind 服务器设置 rpc。

当然还有更复杂的解决方案，比如位于here(coinbit.tk, a splitkey vanity address generator that generates the private key in javascript)的地方

https://github.com/RobKohr/PHP-Bitcoin-Address-Creator

如果您仍有问题，请参阅以下主题。

https://bitcoin.stackexchange.com/questions/2289/php-script-to-create-private-key-public-address

https://bitcointalk.org/index.php?topic=81626.0

Answer 3

这并不是您真正想要的，因为您从特定的私钥开始。 但是，如果您只想生成私钥和公钥，则可能需要查看 vanitygen，它会同时生成两者。