从RSA密钥对获取私钥/公钥base64表示

Question

我想在C＃中生成RSA密钥对。 我能够获得xml字符串的键，但我需要base64表示它们。 这是我的xml代码

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();

privateKeyXmlText = rsa.ToXmlString(true);
publicKeyXmlText = rsa.ToXmlString(false);

但我想要的是什么

privateKeyStr=="MIICITAjBgoqhkiG9w0BDAEDMBUEEKaTCK5mE2MsQANxDAfaJe8CAQoEggH47qb6bFO+a2Fj...";
publicKeyStr == "MIIBKjCB4wYHKoZIzj0CATCB1wIBATAsBgcqhkjOPQEBAiEA/////wAA...";

有任何想法吗？

Answer 1

（回答） C＃从RSACryptoServiceProvider导出私有/公共RSA密钥到PEM字符串

public static Func<string, string> ToBase64PemFromKeyXMLString= (xmlPrivateKey) =>
        {
            if (string.IsNullOrEmpty(xmlPrivateKey))
                throw new ArgumentNullException("RSA key must contains value!");
            var keyContent = new PemReader(new StringReader(xmlPrivateKey));
            if (keyContent == null)
                throw new ArgumentNullException("private key is not valid!");
            var ciphrPrivateKey = (AsymmetricCipherKeyPair)keyContent.ReadObject();
            var asymmetricKey = new AsymmetricKeyEntry(ciphrPrivateKey.Private);

            PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(asymmetricKey.Key);
            var serializedPrivateKey = privateKeyInfo.ToAsn1Object().GetDerEncoded();
            return Convert.ToBase64String(serializedPrivateKey);
        };