Sign document with RSA parameters

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Hello everyone,

I wanna ask question about RSA sign on C#.

I have one document for sign. I have plain hex values of modulus, private exponent and public exponent. I dont' t want to signing with random generated keys. When I try with sign with sign tool, i have got result perfectly. But i can' t do it with C#. I am new for this kind of problem. So i am really stucked.

I looked a lot of sites and arcticles but i couldn't find any solution. Maybe there is but i can' t get it, i don' t know.

If you could explain to me with details(step-step), i will really be grateful.

Thanks a lot.

What I have tried:

I tried a lots of solutions from internet but, its couldn't work.

Posted 1-Aug-17 11:09am

Levent Yağcıoğlu

Updated 2-Aug-17 0:21am

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Thomas Daniels · Answer 1 · 2017-08-02T00:21:00

You can create an RSAParameters instance:
RSAParameters Structure (System.Security.Cryptography)[^]
And then pass those in an RSACryptoServiceProvider[^]:

C#

RSAParameters parameters = new RSAParameters
{
    D = ...,
    DP = ...,
    ....
};
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
{
    rsa.ImportParameters(parameters);
    // rest of your code; read the RSACryptoServiceProvider documentation to see what you can do with it; I believe you're interested in the 'SignData' method
}