针对RSA加密，JavaScript，java，php 和dotnet之间的公私钥转换

迷南。 2022-04-13 04:26 192阅读 0赞

针对js和php、java使用的公钥和私钥，dotnet使用之前都需要进行转换

下面直接提供转换的方法（c\#代码）

using System;
    using System.Xml;
    using Org.BouncyCastle.Asn1.Pkcs;
    using Org.BouncyCastle.Asn1.X509;
    using Org.BouncyCastle.Crypto.Parameters;
    using Org.BouncyCastle.Math;
    using Org.BouncyCastle.Pkcs;
    using Org.BouncyCastle.Security;
    using Org.BouncyCastle.X509;
     
    /// <summary>
    /// RSA密钥格式转换
    ///依赖第三方库 Install-Package BouncyCastle -Version 1.8.4
    /// </summary>
    public class RSAKeyConvert
    {
        /// <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()));
        }
     
        /// <summary>
        /// RSA私钥格式转换，.net->java
        /// </summary>
        /// <param name="privateKey">.net生成的私钥</param>
        /// <returns></returns>
        public static string RSAPrivateKeyDotNet2Java(string privateKey)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(privateKey);
            BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
            BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
            BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText));
            BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText));
            BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText));
            BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText));
            BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText));
            BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText));
     
            RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv);
     
            PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam);
            byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded();
            return Convert.ToBase64String(serializedPrivateBytes);
        }
     
        /// <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公钥格式转换，.net->java
        /// </summary>
        /// <param name="publicKey">.net生成的公钥</param>
        /// <returns></returns>
        public static string RSAPublicKeyDotNet2Java(string publicKey)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(publicKey);
            BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
            BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
            RsaKeyParameters pub = new RsaKeyParameters(false, m, p);
     
            SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub);
            byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded();
            return Convert.ToBase64String(serializedPublicBytes);
        }
    }

### .NET密钥格式如下： ###

私钥：

<table> 
 <tbody> 
  <tr> 
   <td> <p><code>&lt;</code><code>RSAKeyValue</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>Modulus</code><code>&gt;pJlJIR0+G/vs7mhycs0Zd5DbWokMCsLX7Ih373+ljlteRmTm8IHj0Sl8zA26Qu/oAmqh9OFk806zW3TXl90RghSeQhzZBXFHBrTFN4U/o3wPhZBdFazh80bbskrmQ/jmz70qUm3HmGzsb3toxzN6Ehakdo7qP2Kc6aOVTyXrYpk=&lt;/</code><code>Modulus</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>Exponent</code><code>&gt;AQAB&lt;/</code><code>Exponent</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>P</code><code>&gt;1WKkFg6jlS2eZSVLiH1CK4b9uhr7qE1/L+tPqKQs+PzHX4eiZXnyAlQ+kgGmL7n1wR1RWNuiYnDZUetmTogaDQ==&lt;/</code><code>P</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>Q</code><code>&gt;xXhsuEnNJNQcQHEVTPZoulbMbTV1VZIDQ1zjG8fvu8sv6IBYcR5+EsC8n3/6RkW8/iCJDzxE++VHzhoSQSoDvQ==&lt;/</code><code>Q</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>DP</code><code>&gt;zr/rcn+umd0Aisnu/Ik48smxz39TdIfaAwkBPsoL1Re+6V2WyLG1/fG4SmmUpsuMRRdt+SWdmbnzpr7peo++hQ==&lt;/</code><code>DP</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>DQ</code><code>&gt;MWi2W04sBEEGaKFi4QTuo2FAeTrdBvIn2t0M/lCCjYyDijtC5drpVKvhBk+xQZAFf9iIMsWzxQtTciBX3PI0SQ==&lt;/</code><code>DQ</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>InverseQ</code><code>&gt;wGEfA3LWM4NHgRnXDqwwOUs3OtqWK0tsJPPcFMci+Bcgy96JpFTCr7bubXHMu14bdopCWUann2d3UuwEpvP+&lt;/</code><code>InverseQ</code><code>&gt;</code></p> <p><code>&nbsp;&nbsp;</code><code>&lt;</code><code>D</code><code>&gt;mK3TRtMwRJb33OGnn9OeFumYfy92qxi3X6Hq1o6qDBW2qkd4bImfv+ni6AinyOVuaadt2Y+lq4dKGcCVJzoZvPm1VKxD2y7xKa8/vEbPRiRTt0qnPq9T7UJkpDsiXf/zOMfWdjc3uA1bPnQ65RWHSJ7zAE+Gd7xnyCE5MEyijLE=&lt;/</code><code>D</code><code>&gt;</code></p> <p><code>&lt;/</code><code>RSAKeyValue</code><code>&gt;</code></p> </td> 
  </tr> 
 </tbody> 
</table>

公钥：

### java密钥格式如下： ###

私钥：

<table> 
 <tbody> 
  <tr> 
   <td> <p><code>MIICdwIBADANBgkqhkiG9w0BAQEFAASCAmEwggJdAgEAAoGBAKSZSSEdPhv77O5ocnLNGXeQ21qJDArC1+yId+</code><code>9</code><code>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</code><code>4</code><code>=</code></p> </td> 
  </tr> 
 </tbody> 
</table>

公钥：

<table> 
 <tbody> 
  <tr> 
   <td> <p><code>MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkmUkhHT4b++zuaHJyzRl3kNtaiQwKwtfsiHfvf6WOW15GZObwgePRKXzMDbpC7+gCaqH04WTzTrNbdNeX3RGCFJ5CHNkFcUcGtMU3hT+jfA+FkF0VrOHzRtuySuZD+ObPvSpSbceYbOxve2jHM3oSFqR2juo/Ypzpo5VPJetimQIDAQAB</code></p> </td> 
  </tr> 
 </tbody> 
</table>

C\#加解密RSA

/// <summary>
            /// RSA加密
            /// </summary>
            /// <param name="publickey"></param>
            /// <param name="content"></param>
            /// <returns></returns>
            public static string RSAEncrypt(string publickey, string content)
            {
                publickey = @"<RSAKeyValue><Modulus>5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>";
                RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
                byte[] cipherbytes;
                rsa.FromXmlString(publickey);
                cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content), false);
    
                return Convert.ToBase64String(cipherbytes);
            }
    
            /// <summary>
            /// RSA解密
            /// </summary>
            /// <param name="privatekey"></param>
            /// <param name="content"></param>
            /// <returns></returns>
            public static string RSADecrypt(string privatekey, string content)
            {
                privatekey = @"<RSAKeyValue><Modulus>5m9m14XH3oqLJ8bNGw9e4rGpXpcktv9MSkHSVFVMjHbfv+SJ5v0ubqQxa5YjLN4vc49z7SVju8s0X4gZ6AzZTn06jzWOgyPRV54Q4I0DCYadWW4Ze3e+BOtwgVU1Og3qHKn8vygoj40J6U85Z/PTJu3hN1m75Zr195ju7g9v4Hk=</Modulus><Exponent>AQAB</Exponent><P>/hf2dnK7rNfl3lbqghWcpFdu778hUpIEBixCDL5WiBtpkZdpSw90aERmHJYaW2RGvGRi6zSftLh00KHsPcNUMw==</P><Q>6Cn/jOLrPapDTEp1Fkq+uz++1Do0eeX7HYqi9rY29CqShzCeI7LEYOoSwYuAJ3xA/DuCdQENPSoJ9KFbO4Wsow==</Q><DP>ga1rHIJro8e/yhxjrKYo/nqc5ICQGhrpMNlPkD9n3CjZVPOISkWF7FzUHEzDANeJfkZhcZa21z24aG3rKo5Qnw==</DP><DQ>MNGsCB8rYlMsRZ2ek2pyQwO7h/sZT8y5ilO9wu08Dwnot/7UMiOEQfDWstY3w5XQQHnvC9WFyCfP4h4QBissyw==</DQ><InverseQ>EG02S7SADhH1EVT9DD0Z62Y0uY7gIYvxX/uq+IzKSCwB8M2G7Qv9xgZQaQlLpCaeKbux3Y59hHM+KpamGL19Kg==</InverseQ><D>vmaYHEbPAgOJvaEXQl+t8DQKFT1fudEysTy31LTyXjGu6XiltXXHUuZaa2IPyHgBz0Nd7znwsW/S44iql0Fen1kzKioEL3svANui63O3o5xdDeExVM6zOf1wUUh/oldovPweChyoAdMtUzgvCbJk1sYDJf++Nr0FeNW1RB1XG30=</D></RSAKeyValue>";
                RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
                byte[] cipherbytes;
                rsa.FromXmlString(privatekey);
                cipherbytes = rsa.Decrypt(Convert.FromBase64String(content), false);
    
                return Encoding.UTF8.GetString(cipherbytes);
            }
    复制代码

JavaScript版本的RSA加密：

<script type="text/javascript">
    
    var pubkey='-----BEGIN PUBLIC KEY-----';
    pubkey+='MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkmUkhHT4b++zuaHJyzRl3kNtaiQwKwtfsiHfvf6WOW15GZObwgePRKXzMDbpC7+gCaqH04WTzTrNbdNeX3RGCFJ5CHNkFcUcGtMU3hT+jfA+FkF0VrOHzRtuySuZD+ObPvSpSbceYbOxve2jHM3oSFqR2juo/Ypzpo5VPJetimQIDAQAB';
    pubkey+='-----END PUBLIC KEY-----';
        var encrypt = new JSEncrypt();
      encrypt.setPublicKey(pubkey); 
            var encrypted = encrypt.encrypt(data);//RSA加密并返回base64编码后的数据 
            var data=encodeURIComponent(encrypted);//URL编码
        </script>

参考：

rsa密钥的转换 [https://blog.csdn.net/yupu56/article/details/72624229][https_blog.csdn.net_yupu56_article_details_72624229]         [https://www.cnblogs.com/hubro/p/4538925.html][https_www.cnblogs.com_hubro_p_4538925.html]

rsa c\#加解密 [https://www.cnblogs.com/linzheng/archive/2011/02/20/1959123.html][https_www.cnblogs.com_linzheng_archive_2011_02_20_1959123.html]

第三方转换类库BouncyCastle ：[https://www.nuget.org/packages/BouncyCastle/][https_www.nuget.org_packages_BouncyCastle]

[https_blog.csdn.net_yupu56_article_details_72624229]: https://blog.csdn.net/yupu56/article/details/72624229
[https_www.cnblogs.com_hubro_p_4538925.html]: https://www.cnblogs.com/hubro/p/4538925.html
[https_www.cnblogs.com_linzheng_archive_2011_02_20_1959123.html]: https://www.cnblogs.com/linzheng/archive/2011/02/20/1959123.html
[https_www.nuget.org_packages_BouncyCastle]: https://www.nuget.org/packages/BouncyCastle/