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(Mono C#) RSA Signature with Certificate's Private Key from PFXSee more RSA ExamplesDemonstrates how to use a certificate's private key from a PFX file to create an RSA signature.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Create an instance of a certificate store object, load a PFX file, // locate the certificate we need, and use it for signing. // (a PFX file may contain more than one certificate.) Chilkat.CertStore certStore = new Chilkat.CertStore(); // The 1st argument is the filename, the 2nd arg is the // PFX file's password: bool success = certStore.LoadPfxFile("chilkat.pfx","test"); if (success != true) { Debug.WriteLine(certStore.LastErrorText); return; } Chilkat.Cert cert = certStore.FindCertBySubject("Chilkat Software, Inc."); if (certStore.LastMethodSuccess == false) { Debug.WriteLine(certStore.LastErrorText); return; } Chilkat.PrivateKey pkey = cert.ExportPrivateKey(); if (cert.LastMethodSuccess == false) { Debug.WriteLine(cert.LastErrorText); return; } // Get the private key in XML format: string pkeyXml = pkey.GetXml(); Chilkat.Rsa rsa = new Chilkat.Rsa(); // Import the private key into the RSA component: success = rsa.ImportPrivateKey(pkeyXml); if (success != true) { Debug.WriteLine(rsa.LastErrorText); return; } // Encode the signature as a hex string rsa.EncodingMode = "hex"; string strData = "This is the string to be signed."; // Sign the string using the sha-1 hash algorithm. // Other valid choices are "sha-256", "md2" and "md5". string hexSig = rsa.SignStringENC(strData,"sha-1"); Debug.WriteLine(hexSig); Debug.WriteLine("Success!"); |
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