Golang Rsa 加密 解密

2/10/2017来源:ASP.NET技巧人气:1690

1)创建私钥:

openssl genrsa -out PRivate.pem 1024 //密钥长度,1024觉得不够安全的话可以用2048,但是代价也相应增大

2)创建公钥:

openssl rsa -in private.pem -pubout -out public.pem

publicKey <--- public.pem privateKey <--- private.pem

// 加密
func RsaEncrypt(origData []byte) ([]byte, error) {
	block, _ := pem.Decode(publicKey)
	if block == nil {
		return nil, errors.New("public key error")
	}
	pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
	if err != nil {
		return nil, err
	}
	pub := pubInterface.(*rsa.PublicKey)
	return rsa.EncryptPKCS1v15(rand.Reader, pub, origData)
}
// 解密
func RsaDecrypt(ciphertext []byte) ([]byte, error) {
	block, _ := pem.Decode(privateKey)
	if block == nil {
		return nil, errors.New("private key error!")
	}
	priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
	if err != nil {
		return nil, err
	}
	return rsa.DecryptPKCS1v15(rand.Reader, priv, ciphertext)
}