转 C# 使用openssl

//先用大整数来生成一个1024bit的密钥对
            RSA rsa = new RSA();
            BigNumber number = OpenSSL.Core.Random.Next(10, 10, 1);
            rsa.GenerateKeys(1024, number, null, null);
            CryptoKey key = new CryptoKey(rsa);

            //创建X509证书，Subject和Issuer相同
            X509Certificate x509 = new X509Certificate();
            x509.SerialNumber = (int)DateTime.Now.Ticks;
            x509.Subject = new X509Name("CN=DOMAIN");        //DOMAIN为站点域名
            x509.Issuer = new X509Name("CN=DOMAIN");
            x509.PublicKey = key;                            //指定公钥
            x509.NotBefore = Convert.ToDateTime("2011-1-1"); //起始时间
            x509.NotAfter = Convert.ToDateTime("2050-1-1");  //失效时间
            x509.Version = 2;

            //用私钥签一下名
            x509.Sign(key, MessageDigest.MD5);

            //输出到crt文件中
            BIO x509bio = BIO.File("CA.crt", "w");
            x509.Write(x509bio);

            //生成pfx文件，注意证书链必须是空的
            var certs = new OpenSSL.Core.Stack<X509Certificate>();
            PKCS12 p12 = new PKCS12("PASSWORD", key, x509, certs); //PASSWORD为保护密钥
            BIO p12Bio = BIO.File("CA.pfx", "w");
            p12.Write(p12Bio);

            //清理
            rsa.Dispose();
            x509.Dispose();
            x509bio.Dispose();
            p12.Dispose();
            p12Bio.Dispose();

转　　http://www.cnblogs.com/jiecaoge/p/6408176.html

openssl-net git地址是 https://github.com/openssl-net/openssl-net