C# 将私有公共 RSA 密钥从 RSACryptoServiceProvider 导出到 PEM 字符串

如何使用C#将私有/公共RSA密钥从RSACryptoServiceProvider导出到PEM字符串

csharp
using System;
using System.Security.Cryptography;
class Program
{
    static void Main()
    {
        // 创建一个新的RSACryptoServiceProvider实例
        using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
        {
            // 生成一个新的密钥对
            RSAParameters publicKey = rsa.ExportParameters(false);
            RSAParameters privateKey = rsa.ExportParameters(true);
            // 导出公钥和私钥到PEM字符串
            string publicKeyPem = ExportPublicKeyToPem(publicKey);
            string privateKeyPem = ExportPrivateKeyToPem(privateKey);
            Console.WriteLine("公钥：");
            Console.WriteLine(publicKeyPem);
            Console.WriteLine("私钥：");
            Console.WriteLine(privateKeyPem);
        }
    }
    static string ExportPublicKeyToPem(RSAParameters publicKey)
    {
        // TODO: 实现导出公钥到PEM字符串的逻辑
        throw new NotImplementedException();
    }
    static string ExportPrivateKeyToPem(RSAParameters privateKey)
    {
        // TODO: 实现导出私钥到PEM字符串的逻辑
        throw new NotImplementedException();
    }
}

csharp
static string ExportPublicKeyToPem(RSAParameters publicKey)
{
    string publicKeyModulusBase64 = Convert.ToBase64String(publicKey.Modulus);
    string publicKeyExponentBase64 = Convert.ToBase64String(publicKey.Exponent);
    string pemString = $"-----BEGIN RSA PUBLIC KEY-----\n" +
                      $"{publicKeyModulusBase64}\n" +
                      $"{publicKeyExponentBase64}\n" +
                      $"-----END RSA PUBLIC KEY-----";
    return pemString;
}

csharp
static string ExportPrivateKeyToPem(RSAParameters privateKey)
{
    string privateKeyModulusBase64 = Convert.ToBase64String(privateKey.Modulus);
    string privateKeyExponentBase64 = Convert.ToBase64String(privateKey.Exponent);
    string privateKeyPBase64 = Convert.ToBase64String(privateKey.P);
    string privateKeyQBase64 = Convert.ToBase64String(privateKey.Q);
    string privateKeyDPBase64 = Convert.ToBase64String(privateKey.DP);
    string privateKeyDQBase64 = Convert.ToBase64String(privateKey.DQ);
    string privateKeyInverseQBase64 = Convert.ToBase64String(privateKey.InverseQ);
    string pemString = $"-----BEGIN RSA PRIVATE KEY-----\n" +
                      $"{privateKeyModulusBase64}\n" +
                      $"{privateKeyExponentBase64}\n" +
                      $"{privateKeyPBase64}\n" +
                      $"{privateKeyQBase64}\n" +
                      $"{privateKeyDPBase64}\n" +
                      $"{privateKeyDQBase64}\n" +
                      $"{privateKeyInverseQBase64}\n" +
                      $"-----END RSA PRIVATE KEY-----";
    return pemString;
}