net 2.0中不支持rsa.importsaprivateKey（privateKey,out_）,请大家建议一种导入自定义私钥的替代方法

Question

下面是我想使用的代码从自定义私钥创建令牌。其中我得到了2.0.NET framework不支持的rsa.importsaprivateKey（privateKey,out_）方法的错误

        public string CreateToken(string _customerprivateKey, List<Claim> keypairs)
        {
            try
            {
                IdentityModelEventSource.ShowPII = true;
                // var privateKey = privateKeybyteArr;

                byte[] privateKey = Convert.FromBase64String(_customerprivateKey);

                RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(2048);
                **rsa.ImportRSAPrivateKey(privateKey, out _); // not supported in 2.0 .net framework**

                var signingCredentials = new SigningCredentials(
                    new RsaSecurityKey(rsa),
                    SecurityAlgorithms.RsaSha512)
                {
                    CryptoProviderFactory = new CryptoProviderFactory { CacheSignatureProviders = false }
                };

                List<System.Security.Claims.Claim> _claims = new List<System.Security.Claims.Claim>();
                foreach (var item in keypairs)
                {
                    _claims.Add(new System.Security.Claims.Claim(item.Key, item.Value));
                }
                var jwt = new JwtSecurityToken(
                    claims: _claims,
                    signingCredentials: signingCredentials
                );

                string token = new JwtSecurityTokenHandler().WriteToken(jwt);
                return token;
            }
            catch (Exception ex)
            {
                throw;
            }

        }

Answer 1

我已经将XML格式的privateKey传递给createToken方法，这解决了我的问题。参考C#RSA加密/解密与传输。