Convert Python EC Key Pair Generation to Node.js Using Crypto Module

def generate_ec_key_pair(): curve = ec.SECP256R1() # generate ec key pair private_key = ec.generate_private_key(curve) public_key = private_key.public_key()

# get the private key bytes
private_key_bytes = private_key.private_numbers().private_value.to_bytes(32, "big")
# convert the private key bytes to a hex string
private_key_hex = private_key_bytes.hex()

# get the X and Y coordinates of the public key as bytes
x_coordinate_bytes = public_key.public_numbers().x.to_bytes(32, "big")
y_coordinate_bytes = public_key.public_numbers().y.to_bytes(32, "big")

# concatenate the X and Y coordinates and convert them to a hex string
public_key_hex = "04" + x_coordinate_bytes.hex() + y_coordinate_bytes.hex()

return private_key_hex, public_key_hex 转成nodejs

To convert the given Python code for generating an EC key pair to Node.js, you can use the crypto module available in Node.js. Below is the equivalent code in Node.js:

const crypto = require('crypto');

// Generate EC key pair
const { privateKey, publicKey } = crypto.generateKeyPairSync('ec', {
  namedCurve: 'prime256v1', // Equivalent to SECP256R1
  publicKeyEncoding: {
    type: 'spki',
    format: 'der'
  },
  privateKeyEncoding: {
    type: 'pkcs8',
    format: 'der'
  }
});

// Get the private key bytes
const privateKeyBytes = privateKey.slice(privateKey.length - 32);
const privateKeyHex = privateKeyBytes.toString('hex');

// Get the public key bytes
const publicKeyBytes = publicKey.slice(publicKey.length - 65);
const xCoordinateBytes = publicKeyBytes.slice(1, 33);
const yCoordinateBytes = publicKeyBytes.slice(33, 65);

// Concatenate the X and Y coordinates and convert them to a hex string
const publicKeyHex = '04' + xCoordinateBytes.toString('hex') + yCoordinateBytes.toString('hex');

console.log('Private Key (Hex):', privateKeyHex);
console.log('Public Key (Hex):', publicKeyHex);

Explanation:

1. Generate EC Key Pair: The crypto.generateKeyPairSync function is used to generate the EC key pair with the named curve prime256v1, which is equivalent to SECP256R1.
2. Private Key: The private key is extracted from the DER-encoded private key. The last 32 bytes represent the private key value.
3. Public Key: The public key is extracted from the DER-encoded public key. The first byte is a prefix (0x04), followed by the X and Y coordinates, each 32 bytes long.
4. Hex Conversion: The X and Y coordinates are concatenated and converted to a hex string, prefixed with '04'.

This code will generate the EC key pair and print the private and public keys in hexadecimal format, similar to the Python code provided.