C# RSA 公共模数/指数? (坏数据)

发布于 2024-09-02 13:41:36 字数 2609 浏览 4 评论 0原文

我已经尝试了很多次,但我仍然收到“错误数据”。如何使用带有公钥指数/模数的 RSACryptoServiceProvider 来解密数据?

public static byte[] Encrypt(byte[] b, byte[] mod, byte[] exp)
{
    CspParameters csp = new CspParameters();
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);
    RSACryptoServiceProvider.UseMachineKeyStore = false;

    RSAParameters par = new RSAParameters();
    par.Exponent = exp;
    par.Modulus = mod;
    rsa.ImportParameters(par);

    return rsa.Encrypt(b, false);
}
public static byte[] Decrypt(byte[] b, byte[] pubexp, byte[] mod, byte[] priexp)
{
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
    RSACryptoServiceProvider.UseMachineKeyStore = false;
    RSAParameters rp = new RSAParameters();

    rp.Exponent = pubexp;
    rp.D = priexp;

    rp.Modulus = mod;
    rsa.ImportParameters(rp);
    return rsa.Decrypt(b, false);
}

static List<byte[]> Base2Array(string str)
{
    byte[] b = Convert.FromBase64String(str);

    List<byte[]> Bytes = new List<byte[]>();

    int i = 0;
    while (i < b.Length)
    {
        int size = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b, i));
        i += 4;
        byte[] b2 = new byte[size];
        Array.Copy(b, i, b2, 0, size);
        Bytes.Add(b2);
        i += size;
    }

    return Bytes;
}


static void Main(string[] args)
{
    List<byte[]> pub = Base2Array("AAAAB3NzaC1yc2EAAAABJQAAAIBMW4HxU1glv+CcZpJnvUKEyeNfFoKkyLOVLOOb/vNXQkrkGsNdpYAZkKKizij8fD3u3/iYT8UI+xkFoyonRYVipgCslirJB1VdvLivXs69Ht4vf7VAv2yJSUni3XsIHauMlfOkjJ7DpUW75ZkrxsGieICFWlXvRnAyDdqQrkZRZQ==");
    List<byte[]> pri = Base2Array("AAAAgBSjHDNiojO3UXZg6Ux4VyrOx9SCn9mCWgykWTEUeR6Anp6DxhlPUw3UEEetVy97hlw8iGCEQxcvG4T7qocni9UtUTLdpuQzvr6718y2CP0ouKt/1hVKD9QssT08XUvJEBQnnl2yVZAbIqT/DGnUH36L0BnQE/2ombPakwHscfFFAAAAQQCSfQy2cP8Oa0IR0u0whxqGmuuXY/3tCD8NaaSCYm31ly0QBdxFdf2WkC51DNVaf5/1ErHceMapFN9Z3j+/6lA7AAAAQQCFcMoSA32f240nFBmMv/nn/mL1uSdAXOxjUHViJc6M8ntZvW2ZuP2qTvfA3mh1AK5K69piX/4T72xxqTA2tmrfAAAAQFxX1JunFI+fpobdienVCZcjibwbpDPf1MVTbwQhAXHqVBL3XXgkysS/67X/aWnv/+SdBDaXa1SnDpphSWOkxAQ=");

    //pub[0] 7
    //pub[1] 1
    //pub[2] 128

    //pri[0] 128
    //pri[1] 65
    //pri[2] 65
    //pri[3] 64

    byte[] pubmod = null;
    byte[] primod = null;
    byte[] pubexp = null;
    byte[] priexp = null;

    pubexp = pub[0];
    pubmod = pub[2];

    priexp = pri[0];
    primod = pri[2];


    byte[] bstr = Encoding.ASCII.GetBytes("Test");

    bstr = Encrypt(bstr, pubmod, pubexp);
    bstr = Decrypt(bstr, pubexp, pubmod, null);


    string str = Encoding.ASCII.GetString(bstr);
}

I have tried and tried but I continue to get "Bad Data". How do you decrypt data using the RSACryptoServiceProvider with the public key's Exponent/Modulus?

public static byte[] Encrypt(byte[] b, byte[] mod, byte[] exp)
{
    CspParameters csp = new CspParameters();
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);
    RSACryptoServiceProvider.UseMachineKeyStore = false;

    RSAParameters par = new RSAParameters();
    par.Exponent = exp;
    par.Modulus = mod;
    rsa.ImportParameters(par);

    return rsa.Encrypt(b, false);
}
public static byte[] Decrypt(byte[] b, byte[] pubexp, byte[] mod, byte[] priexp)
{
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
    RSACryptoServiceProvider.UseMachineKeyStore = false;
    RSAParameters rp = new RSAParameters();

    rp.Exponent = pubexp;
    rp.D = priexp;

    rp.Modulus = mod;
    rsa.ImportParameters(rp);
    return rsa.Decrypt(b, false);
}

static List<byte[]> Base2Array(string str)
{
    byte[] b = Convert.FromBase64String(str);

    List<byte[]> Bytes = new List<byte[]>();

    int i = 0;
    while (i < b.Length)
    {
        int size = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(b, i));
        i += 4;
        byte[] b2 = new byte[size];
        Array.Copy(b, i, b2, 0, size);
        Bytes.Add(b2);
        i += size;
    }

    return Bytes;
}


static void Main(string[] args)
{
    List<byte[]> pub = Base2Array("AAAAB3NzaC1yc2EAAAABJQAAAIBMW4HxU1glv+CcZpJnvUKEyeNfFoKkyLOVLOOb/vNXQkrkGsNdpYAZkKKizij8fD3u3/iYT8UI+xkFoyonRYVipgCslirJB1VdvLivXs69Ht4vf7VAv2yJSUni3XsIHauMlfOkjJ7DpUW75ZkrxsGieICFWlXvRnAyDdqQrkZRZQ==");
    List<byte[]> pri = Base2Array("AAAAgBSjHDNiojO3UXZg6Ux4VyrOx9SCn9mCWgykWTEUeR6Anp6DxhlPUw3UEEetVy97hlw8iGCEQxcvG4T7qocni9UtUTLdpuQzvr6718y2CP0ouKt/1hVKD9QssT08XUvJEBQnnl2yVZAbIqT/DGnUH36L0BnQE/2ombPakwHscfFFAAAAQQCSfQy2cP8Oa0IR0u0whxqGmuuXY/3tCD8NaaSCYm31ly0QBdxFdf2WkC51DNVaf5/1ErHceMapFN9Z3j+/6lA7AAAAQQCFcMoSA32f240nFBmMv/nn/mL1uSdAXOxjUHViJc6M8ntZvW2ZuP2qTvfA3mh1AK5K69piX/4T72xxqTA2tmrfAAAAQFxX1JunFI+fpobdienVCZcjibwbpDPf1MVTbwQhAXHqVBL3XXgkysS/67X/aWnv/+SdBDaXa1SnDpphSWOkxAQ=");

    //pub[0] 7
    //pub[1] 1
    //pub[2] 128

    //pri[0] 128
    //pri[1] 65
    //pri[2] 65
    //pri[3] 64

    byte[] pubmod = null;
    byte[] primod = null;
    byte[] pubexp = null;
    byte[] priexp = null;

    pubexp = pub[0];
    pubmod = pub[2];

    priexp = pri[0];
    primod = pri[2];


    byte[] bstr = Encoding.ASCII.GetBytes("Test");

    bstr = Encrypt(bstr, pubmod, pubexp);
    bstr = Decrypt(bstr, pubexp, pubmod, null);


    string str = Encoding.ASCII.GetString(bstr);
}

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评论(2

雨后彩虹 2024-09-09 13:41:37

我做了类似的事情:

public byte[] PublicDecryption(byte[] encryptedData)
{
        var encData = new BigInteger(encryptedData);
        BigInteger bnData = encData.modPow(_exponent, _modulus);
        return bnData.getBytes();
}

public byte[] PrivateDecryption(byte[] encryptedData)
{
    var encData = new BigInteger(encryptedData);
    d = new BigInteger(rsaParams.D);
    BigInteger bnData = encData.modPow(d, _modulus);
    return bnData.getBytes();
}

BigInteger 是这样的:

http://www.codeproject.com/ KB/cs/biginteger.aspx

因为微软的实现是部分的并且有错误。

我从来没有遇到过这个问题。

希望这有帮助

i do something like that:

public byte[] PublicDecryption(byte[] encryptedData)
{
        var encData = new BigInteger(encryptedData);
        BigInteger bnData = encData.modPow(_exponent, _modulus);
        return bnData.getBytes();
}

public byte[] PrivateDecryption(byte[] encryptedData)
{
    var encData = new BigInteger(encryptedData);
    d = new BigInteger(rsaParams.D);
    BigInteger bnData = encData.modPow(d, _modulus);
    return bnData.getBytes();
}

where BigInteger is this:

http://www.codeproject.com/KB/cs/biginteger.aspx

because microsoft implementation is partial and buggy.

I've never had a problem with this.

Hope this help

め可乐爱微笑 2024-09-09 13:41:37

几个月前,我尝试实现私钥加密和公钥解密的场景。我花了一周的时间尝试使用 RSACryptoServiceProvider 来完成此操作,但......什么也没做。它们仅支持两种用例:

  1. 公钥加密、私钥(完整)密钥解密。

  2. 用私钥签名,用公钥验证。

他们已尽一切努力不允许您使用他们的 API 做其他事情。
请查看 msdn 论坛:
我发现了很多类似的答案 msdn,包括支持开发团队的答案。他们都说:这是设计上禁止的。所以我的建议是不要尝试使用 RSACryptoServiceProvider 来做到这一点,最好使用其他实现。

Few month ago I have tried to implement scenario with private key encryption and public key decryption. I spent a week trying doing this with RSACryptoServiceProvider and.. nothing. They support only two use cases:

  1. Public key encryption , private (full) key decryption.

  2. Signing with private key, verifying with public.

And they have done everything to not allow you do something else with their API.
Please, check out msdn forums:
I have found many answers like that one msdn, including answers from support development team. All they said: that this is prohibit by design. So my suggestion is don't even try to do that with RSACryptoServiceProvider, better use another implementation.

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