JavaScript 导入私钥的椭圆曲线加密错误：私钥错误？

Question

我想使用这个库 JavaScript Elliptic curve cryptography library 基于 ECIES 加密和解密消息。 我想导入我的私钥并从中获取 public 密钥，因为每次 运行 代码时我都没有生成新的私钥。

代码：

var eccrypto = require("eccrypto");

var privateKeyB = 'efae5b8156d785913e244c39ca5b9bee1a46875d123d2f49bbeb0a91474118cf';
var publicKeyB = eccrypto.getPublic(privateKeyB);
console.log(publicKeyB.toString('hex'))

// Encrypting the message for B.
eccrypto.encrypt(publicKeyB, Buffer.from("msg to b")).then(function(encrypted) {
  // B decrypting the message.
  eccrypto.decrypt(privateKeyB, encrypted).then(function(plaintext) {
    console.log("Message to part B:", plaintext.toString());
  });
});

但是，代码无法运行并显示此错误：

    throw new Error(message || "Assertion failed");
    ^
    Error: Bad private key

Answer 1

eccrypto.getPublic() 期望 Buffer 作为参数，而不是 string。试试这个：

var eccrypto = require("eccrypto");

var privateKeyB = Buffer.from('efae5b8156d785913e244c39ca5b9bee1a46875d123d2f49bbeb0a91474118cf', 'hex');
var publicKeyB = eccrypto.getPublic(privateKeyB);
console.log(publicKeyB.toString('hex'))

// Encrypting the message for B.
eccrypto.encrypt(publicKeyB, Buffer.from("msg to b")).then(function(encrypted) {
  // B decrypting the message.
  eccrypto.decrypt(privateKeyB, encrypted).then(function(plaintext) {
    console.log("Message to part B:", plaintext.toString());
  });
});