C#实现SHA256WithRSA加密用于Java的秘钥私钥

超、凢脫俗 2023-08-17 15:22 114阅读 0赞

首先要把Java秘钥进行转换，然后再进行加密

转制秘钥的方法

public static string RSAPrivateKeyJava2DotNet(string privateKey)
    {
                RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(Convert.FromBase64String(privateKey));
    
                return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent><P>{2}</P><Q>{3}</Q><DP>{4}</DP><DQ>{5}</DQ><InverseQ>{6}</InverseQ><D>{7}</D></RSAKeyValue>",
                    Convert.ToBase64String(privateKeyParam.Modulus.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.PublicExponent.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.P.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.Q.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.DP.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.DQ.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.QInv.ToByteArrayUnsigned()),
                    Convert.ToBase64String(privateKeyParam.Exponent.ToByteArrayUnsigned()));
    }

加密的方法

public static string Sign(string contentForSign, string privateKey)
            {
                //转换成适用于.Net的秘钥
                var netKey = RSAPrivateKeyJava2DotNet(privateKey);
                var rsa = new RSACryptoServiceProvider();
                rsa.FromXmlString(netKey);
                //创建一个空对象
                var rsaClear = new RSACryptoServiceProvider();
                var paras = rsa.ExportParameters(true);
                rsaClear.ImportParameters(paras);
                //签名返回
                using (var sha256 = new SHA256CryptoServiceProvider())
                {
                    var signData = rsa.SignData(Encoding.UTF8.GetBytes(contentForSign), sha256);
                    return BytesToHex(signData);
                }
            } 
    
    
    public static string BytesToHex(byte[] data)
    {
                StringBuilder sbRet = new StringBuilder(data.Length * 2);
                for (int i = 0; i < data.Length; i++)
                {
                    sbRet.Append(Convert.ToString(data[i], 16).PadLeft(2, '0'));
                }
                return sbRet.ToString();
    }

调用：

string rsaSecret = @"MIIBUwIBADANBgkqhkiG9w0BAQEFAASCAT0wggE5AgEAAkEAjdAhDuqzKCzaYyrrxFLdWVoR7wwmSdbVHBSZ/lpILvN/vPaohbi0NChwAEXYbvIXrFQ7zQyuqKazoEbvvXRNKQ.......";
    
    string signDataString = Sign("Hello World!", rsaSecret);

转载于:https://www.cnblogs.com/bzmy/p/11504413.html