C#

RSASSA-PSS Algorithm with SHA256 Hashing

See more RSA Examples

RSA encrypt a SHA256 hash with OAEP padding. C#

bool success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.PrivateKey privkey = new Chilkat.PrivateKey();

// Load the private key object from a PEM file.
// (To load from a PEM string, call LoadPem instead.)
success = privkey.LoadPemFile("somePath/myPrivateKey.pem");
if (success == false) {
    Debug.WriteLine(privkey.LastErrorText);
    return;
}

Chilkat.Rsa rsa = new Chilkat.Rsa();
// Use RSA-PSS by setting PkcsPadding = false
rsa.PkcsPadding = false;
// Use SHA256
rsa.OaepHash = "SHA-256";

rsa.UsePrivateKey(privkey);

// Generate a base64 signature.
rsa.EncodingMode = "base64";

string sigStr = rsa.SignStringENC("String to be signed","SHA-256");
if (rsa.LastMethodSuccess == false) {
    Debug.WriteLine(rsa.LastErrorText);
    return;
}

Debug.WriteLine("Signature: " + sigStr);