node_js_golang_rsa

// Node JS


var crypto = require('crypto');

// decrypt 
var privKeyPem = `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
`

var secretData = Buffer.from(`chO6rEYhdLhjwIMCet+8Xdk4YG8myLkkhBeq2VGRaFqnWsSx3j0thrQkZ9fRA2hqjSKpfXAXrkue51YKuqcywiwYNNcNKF7nb//wjOKJliK9LFe3kQkE6VBEIe6ji7P44i9894UoeNqFdfDTEbaHCbjEJbc4VIr2imF3jUu6OetmHfQsfbztJsvOM+GFufQQWBujFEz5jFQYzLu+Eh3DsXP9ACR3K+on2+eEqDvhldKBcHmjS1Z51v/QxQynTNqqkjN9bHWWegiWSi/sQR1+ApYqYaojAvQL/Trw1PMXju1X/cbjo9onZRuFS4kJ+oosFTCURMjOtKBQ+nOa95O1gw==`, "base64");
origData = crypto.privateDecrypt({
	key: Buffer.from(privKeyPem, 'base64').toString(),
	padding: crypto.constants.RSA_PKCS1_PADDING,
}, secretData); 
console.log(origData.toString("base64"));

return
// encrypt 

var pubKeyPem = `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`

var randKey1 = crypto.randomBytes(32);

var rsaEncrypted1 = crypto.publicEncrypt({
      key: Buffer.from(pubKeyPem, 'base64').toString(),
      // @ts-ignore
      padding: crypto.constants.RSA_PKCS1_PADDING,
    }, randKey1);

console.log("rand key", randKey1.toString('base64'));
console.log(rsaEncrypted1.toString('base64'));

// -----------------------------------------------------
// Go
func GenerateAndStoreKeys() {
	// generate key
	privatekey, err := rsa.GenerateKey(rand2.Reader, 2048)
	if err != nil {
		fmt.Printf("Cannot generate RSA key\n")
		os.Exit(1)
	}
	publickey := &privatekey.PublicKey

	// dump private key to file
	var privateKeyBytes = x509.MarshalPKCS1PrivateKey(privatekey)
	privateKeyBlock := &pem.Block{
		Type:  "RSA PRIVATE KEY",
		Bytes: privateKeyBytes,
	}
	privatePem, err := os.Create("private.pem")
	if err != nil {
		fmt.Printf("error when create private.pem: %s \n", err)
		os.Exit(1)
	}
	err = pem.Encode(privatePem, privateKeyBlock)
	if err != nil {
		fmt.Printf("error when encode private pem: %s \n", err)
		os.Exit(1)
	}

	// dump public key to file
	publicKeyBytes, _ := x509.MarshalPKIXPublicKey(publickey)
	publicKeyBlock := &pem.Block{
		Type:  "PUBLIC KEY",
		Bytes: publicKeyBytes,
	}
	publicPem, err := os.Create("public.pem")
	if err != nil {
		fmt.Printf("error when create public.pem: %s \n", err)
		os.Exit(1)
	}
	err = pem.Encode(publicPem, publicKeyBlock)
	if err != nil {
		fmt.Printf("error when encode public pem: %s \n", err)
		os.Exit(1)
	}
}

func DecodePrivateKeyFromPem() (*rsa.PrivateKey, error) {
	path := "private.pem"
	bs, _ := ioutil.ReadFile(path)
	block, _ := pem.Decode(bs)
	pKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
	if err != nil {
		return nil, err
	}
	return pKey, nil
}

func main() {
	// GenerateAndStoreKeys()
	pKey, err := DecodePrivateKeyFromPem()
	if err != nil {
		fmt.Println(err)
		return
	}
	b64Cipher := `gqsVlFIW/Txkq4NzdrQqW7ahKsdoBwsJUjNhW/Sh3rfCVDhs1Sqk3YcYHdxNh7v+uxW3iDU/xfgQGG7QZCutpRE+IRTK5ja0oQp9P8tf2GCeGLX0UmklV/uUunD/OxzYAzBxpU8XoYTnKPEFLOOZtpiFnCiHOIlm7V9Y+KLsZWS2aOkFie4lEmpz/di0Tp13qyJoTW9NJWQrvLks2wmVGYDcxITtYn0B2LbcNsOrjGoB7B9ImbtULTxiQpsVslkTKi4krZTqBVqtXXG
UDE5n4aZUWvSh/eXqyeiVJTLpZHOS5n6oNN+dd5v2mbgX7hU1gTNlggoQD6i7MlnyyX9b6A==`
	cipherTextBytes, _ := base64.StdEncoding.DecodeString(b64Cipher)
	decipher, _ := rsa.DecryptPKCS1v15(rand2.Reader, pKey, cipherTextBytes)
	fmt.Println(base64.StdEncoding.EncodeToString(decipher))
}