C#RSA对接JAVA中RSA方式

ゝ一纸荒年。 2023-08-17 17:27 77阅读 0赞

C\#中通过FromXmlString属性加载的是XML形式,而JAVA中用到的是解析后的PEM格式的字符串,总之读取证书中信息无非是转换方式问题

/// <summary>
            ///  c# 使用 java 的公钥进行rsa加密 utf8编码   通过解析公钥加密数据
            /// </summary>
            /// <param name="publickey"></param>
            /// <returns></returns>
            public static string RSAEncrypts(string content)
            {
    
                RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
                byte[] cipherbytes;
                X509Certificate2 x509Certificate2 = new X509Certificate2("D:\\Config\\dsptest.cer");
                //创建并返回当前算法对象的xml字符串表示形式
                string publicKeyString = x509Certificate2.PublicKey.Key.ToXmlString(false);
                rsa.FromXmlString(publicKeyString);
                //rsa.FromXmlString(RSAPublicKeyJava2DotNet(publicKeyString));
                cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);
                return Convert.ToBase64String(cipherbytes);   
            }
    
                /// <summary>
                /// 私钥解密  通过解析私钥来解析数据  X509KeyStorageFlags.Exportable这个属性很关键是获取私钥信息的
                /// </summary>
                /// <param name="privatekey"></param>
                /// <param name="content"></param>
                /// <returns></returns>
             public static string RSADecrypt( string content)
            {
                byte[] rgb = Convert.FromBase64String(content);
                RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
                byte[] cipherbytes;
                X509Certificate2 x509Certificate2 = new X509Certificate2("D:\\Config\\test.pfx", "cfca1234", X509KeyStorageFlags.Exportable);
                //创建并返回当前算法对象的xml字符串表示形式
                //rsa.FromXmlString(RSAPrivateKeyJava2DotNet(Const.privatekey));
    
                rsa.FromXmlString(x509Certificate2.PrivateKey.ToXmlString(true));
                cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);
                return Encoding.UTF8.GetString(cipherbytes);            
            }

/***************以下是java提供的公私钥转成.net公私钥XML的方式*************************************/
    /// <summary> 
    /// RSA公钥格式转换，java->.net
    /// </summary>
    /// <param name="publicKey">java生成的公钥</param>
    /// <returns></returns>
    public static string RSAPublicKeyJava2DotNet(string publicKey)
    {
    RsaKeyParameters publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));
    return string.Format("<RSAKeyValue><Modulus>{0}</Modulus><Exponent>{1}</Exponent></RSAKeyValue>",
    Convert.ToBase64String(publicKeyParam.Modulus.ToByteArrayUnsigned()),
    Convert.ToBase64String(publicKeyParam.Exponent.ToByteArrayUnsigned()));
    }
    
    /// <summary>
    /// RSA私钥格式转换，java->.net
    /// </summary>
    /// <param name="privateKey">java生成的RSA私钥</param>
    /// <returns></returns>
    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()));
    
    }

转载于:https://www.cnblogs.com/weihengblogs/p/11442014.html