C#使用java产出的RSA秘钥进行 公钥加密私钥解密 私钥加密公钥解密

RSA公钥加密私钥解密工具类

/// <summary>  
/// 公钥加密  
/// </summary>  
/// <param name="resData">需要加密的字符串</param>  
/// <param name="publicKey">公钥</param>  
/// <param name="input_charset">编码格式</param>  
/// <returns>明文</returns>  
public static string encryptData(string resData, string publicKey, string input_charset)
{
    byte[] DataToEncrypt = Encoding.ASCII.GetBytes(resData);
    string result = encrypt(DataToEncrypt, publicKey, input_charset);
    return result;
}


/// <summary>  
/// 私钥解密  
/// </summary>  
/// <param name="resData">加密字符串</param>  
/// <param name="privateKey">私钥</param>  
/// <param name="input_charset">编码格式</param>  
/// <returns>明文</returns>  
public static string decryptData(string resData, string privateKey, string input_charset)
{
    byte[] DataToDecrypt = Convert.FromBase64String(resData);
    string result = "";
    for (int j = 0; j < DataToDecrypt.Length / 128; j++)
    {
        byte[] buf = new byte[128];
        for (int i = 0; i < 128; i++)
        {

            buf[i] = DataToDecrypt[i + 128 * j];
        }
        result += decrypt(buf, privateKey, input_charset);
    }

    return result;
}

RSA私钥加密公钥解密工具类,依赖于BouncyCastle.Crypto.dll

/// <summary>
/// 私钥加密
/// </summary>
/// <param name="s">明文</param>
/// <param name="key">私钥(java产出的string)</param>
public static string EncryptByPrivateKey(string s, string key)
{
    //非对称加密算法，加解密用  
    IAsymmetricBlockCipher engine = new Pkcs1Encoding(new RsaEngine());

    //加密  
    try
    {
        engine.Init(true, GetPrivateKeyParameter(key));
        byte[] byteData = System.Text.Encoding.UTF8.GetBytes(s);
        var ResultData = engine.ProcessBlock(byteData, 0, byteData.Length);
        return Convert.ToBase64String(ResultData);
        //Console.WriteLine("密文（base64编码）:" + Convert.ToBase64String(testData) + Environment.NewLine);
    }
    catch (Exception ex)
    {
        return ex.Message;
    }
}

/// <summary>
/// 公钥解密
/// </summary>
/// <param name="s">明文</param>
/// <param name="key">公钥(java产出的string)</param>
public static string DecryptByPublicKey(string s, string key)
{
    s = s.Replace("\r", "").Replace("\n", "").Replace(" ", "");
    //非对称加密算法，加解密用  
    IAsymmetricBlockCipher engine = new Pkcs1Encoding(new RsaEngine());

    //解密  
    try
    {
        engine.Init(false, GetPublicKeyParameter(key));
        byte[] byteData = Convert.FromBase64String(s);
        var ResultData = engine.ProcessBlock(byteData, 0, byteData.Length);
        return System.Text.Encoding.UTF8.GetString(ResultData);
    }
    catch (Exception ex)
    {
        return ex.Message;
    }
}

亲测可用 代码工具类已整理好，有需要的可以下载一下：https://download.youkuaiyun.com/download/qq_37835111/10958784